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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * libata-core.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
Alan Cox92c52c52007-11-19 14:30:16 +000033 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
40 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/kernel.h>
44#include <linux/module.h>
45#include <linux/pci.h>
46#include <linux/init.h>
47#include <linux/list.h>
48#include <linux/mm.h>
49#include <linux/highmem.h>
50#include <linux/spinlock.h>
51#include <linux/blkdev.h>
52#include <linux/delay.h>
53#include <linux/timer.h>
54#include <linux/interrupt.h>
55#include <linux/completion.h>
56#include <linux/suspend.h>
57#include <linux/workqueue.h>
Jeff Garzik67846b32005-10-05 02:58:32 -040058#include <linux/jiffies.h>
David Hardeman378f0582005-09-17 17:55:31 +100059#include <linux/scatterlist.h>
Jeff Garzik2dcb4072007-10-19 06:42:56 -040060#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <scsi/scsi.h>
Jeff Garzik193515d2005-11-07 00:59:37 -050062#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <scsi/scsi_host.h>
64#include <linux/libata.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <asm/semaphore.h>
66#include <asm/byteorder.h>
Tejun Heo140b5e52007-12-12 12:21:52 +090067#include <linux/cdrom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69#include "libata.h"
70
Jeff Garzikfda0efc2007-01-31 07:43:15 -050071
Tejun Heod7bb4cc2006-05-31 18:27:46 +090072/* debounce timing parameters in msecs { interval, duration, timeout } */
Tejun Heoe9c83912006-07-03 16:07:26 +090073const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
74const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
75const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
Tejun Heod7bb4cc2006-05-31 18:27:46 +090076
Tejun Heo3373efd2006-05-15 20:57:53 +090077static unsigned int ata_dev_init_params(struct ata_device *dev,
78 u16 heads, u16 sectors);
79static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
Jeff Garzik218f3d32007-10-25 00:33:27 -040080static unsigned int ata_dev_set_feature(struct ata_device *dev,
81 u8 enable, u8 feature);
Tejun Heo3373efd2006-05-15 20:57:53 +090082static void ata_dev_xfermask(struct ata_device *dev);
Tejun Heo75683fe2007-07-05 13:31:27 +090083static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Tejun Heof3187192007-04-17 23:44:07 +090085unsigned int ata_print_id = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086static struct workqueue_struct *ata_wq;
87
Tejun Heo453b07a2006-05-31 18:27:42 +090088struct workqueue_struct *ata_aux_wq;
89
Jeff Garzik418dc1f2006-03-11 20:50:08 -050090int atapi_enabled = 1;
Jeff Garzik1623c812005-08-30 03:37:42 -040091module_param(atapi_enabled, int, 0444);
92MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
93
Albert Lee95de7192006-04-04 10:57:18 +080094int atapi_dmadir = 0;
95module_param(atapi_dmadir, int, 0444);
96MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
97
Mark Lordbaf4fdf2007-08-08 01:08:45 +090098int atapi_passthru16 = 1;
99module_param(atapi_passthru16, int, 0444);
100MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
101
Jeff Garzikc3c013a2006-02-27 22:31:19 -0500102int libata_fua = 0;
103module_param_named(fua, libata_fua, int, 0444);
104MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
105
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400106static int ata_ignore_hpa;
Alan Cox1e999732007-04-11 00:23:13 +0100107module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
108MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
109
Alan Coxb3a70602007-10-02 12:38:26 -0400110static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
111module_param_named(dma, libata_dma_mask, int, 0444);
112MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
113
Andrew Mortona8601e52006-06-25 01:36:52 -0700114static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
115module_param(ata_probe_timeout, int, 0444);
116MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
117
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400118int libata_noacpi = 0;
Jeff Garzikd7d0dad2007-03-28 01:57:37 -0400119module_param_named(noacpi, libata_noacpi, int, 0444);
Jeff Garzik6ebe9d82007-10-05 16:28:36 -0400120MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700121
Alan Coxae8d4ee2007-11-04 22:05:49 -0500122int libata_allow_tpm = 0;
123module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
124MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126MODULE_AUTHOR("Jeff Garzik");
127MODULE_DESCRIPTION("Library module for ATA devices");
128MODULE_LICENSE("GPL");
129MODULE_VERSION(DRV_VERSION);
130
Edward Falk0baab862005-06-02 18:17:13 -0400131
132/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
134 * @tf: Taskfile to convert
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 * @pmp: Port multiplier port
Tejun Heo99771262007-07-16 14:29:38 +0900136 * @is_cmd: This FIS is for command
137 * @fis: Buffer into which data will output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 *
139 * Converts a standard ATA taskfile to a Serial ATA
140 * FIS structure (Register - Host to Device).
141 *
142 * LOCKING:
143 * Inherited from caller.
144 */
Tejun Heo99771262007-07-16 14:29:38 +0900145void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Tejun Heo99771262007-07-16 14:29:38 +0900147 fis[0] = 0x27; /* Register - Host to Device FIS */
148 fis[1] = pmp & 0xf; /* Port multiplier number*/
149 if (is_cmd)
150 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 fis[2] = tf->command;
153 fis[3] = tf->feature;
154
155 fis[4] = tf->lbal;
156 fis[5] = tf->lbam;
157 fis[6] = tf->lbah;
158 fis[7] = tf->device;
159
160 fis[8] = tf->hob_lbal;
161 fis[9] = tf->hob_lbam;
162 fis[10] = tf->hob_lbah;
163 fis[11] = tf->hob_feature;
164
165 fis[12] = tf->nsect;
166 fis[13] = tf->hob_nsect;
167 fis[14] = 0;
168 fis[15] = tf->ctl;
169
170 fis[16] = 0;
171 fis[17] = 0;
172 fis[18] = 0;
173 fis[19] = 0;
174}
175
176/**
177 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
178 * @fis: Buffer from which data will be input
179 * @tf: Taskfile to output
180 *
Mark Lorde12a1be2005-11-12 18:55:45 -0500181 * Converts a serial ATA FIS structure to a standard ATA taskfile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 *
183 * LOCKING:
184 * Inherited from caller.
185 */
186
Jeff Garzik057ace52005-10-22 14:27:05 -0400187void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
189 tf->command = fis[2]; /* status */
190 tf->feature = fis[3]; /* error */
191
192 tf->lbal = fis[4];
193 tf->lbam = fis[5];
194 tf->lbah = fis[6];
195 tf->device = fis[7];
196
197 tf->hob_lbal = fis[8];
198 tf->hob_lbam = fis[9];
199 tf->hob_lbah = fis[10];
200
201 tf->nsect = fis[12];
202 tf->hob_nsect = fis[13];
203}
204
Albert Lee8cbd6df2005-10-12 15:06:27 +0800205static const u8 ata_rw_cmds[] = {
206 /* pio multi */
207 ATA_CMD_READ_MULTI,
208 ATA_CMD_WRITE_MULTI,
209 ATA_CMD_READ_MULTI_EXT,
210 ATA_CMD_WRITE_MULTI_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100211 0,
212 0,
213 0,
214 ATA_CMD_WRITE_MULTI_FUA_EXT,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800215 /* pio */
216 ATA_CMD_PIO_READ,
217 ATA_CMD_PIO_WRITE,
218 ATA_CMD_PIO_READ_EXT,
219 ATA_CMD_PIO_WRITE_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100220 0,
221 0,
222 0,
223 0,
Albert Lee8cbd6df2005-10-12 15:06:27 +0800224 /* dma */
225 ATA_CMD_READ,
226 ATA_CMD_WRITE,
227 ATA_CMD_READ_EXT,
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100228 ATA_CMD_WRITE_EXT,
229 0,
230 0,
231 0,
232 ATA_CMD_WRITE_FUA_EXT
Albert Lee8cbd6df2005-10-12 15:06:27 +0800233};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235/**
Albert Lee8cbd6df2005-10-12 15:06:27 +0800236 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
Tejun Heobd056d72006-11-14 22:47:10 +0900237 * @tf: command to examine and configure
238 * @dev: device tf belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 *
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500240 * Examine the device configuration and tf->flags to calculate
Albert Lee8cbd6df2005-10-12 15:06:27 +0800241 * the proper read/write commands and protocol to use.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 *
243 * LOCKING:
244 * caller.
245 */
Tejun Heobd056d72006-11-14 22:47:10 +0900246static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100248 u8 cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100250 int index, fua, lba48, write;
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500251
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100252 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800253 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
254 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Albert Lee8cbd6df2005-10-12 15:06:27 +0800256 if (dev->flags & ATA_DFLAG_PIO) {
257 tf->protocol = ATA_PROT_PIO;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100258 index = dev->multi_count ? 0 : 8;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900259 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
Alan Cox8d238e02006-01-17 20:50:31 +0000260 /* Unable to use DMA due to host limitation */
261 tf->protocol = ATA_PROT_PIO;
Albert Lee0565c262006-02-13 18:55:25 +0800262 index = dev->multi_count ? 0 : 8;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800263 } else {
264 tf->protocol = ATA_PROT_DMA;
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100265 index = 16;
Albert Lee8cbd6df2005-10-12 15:06:27 +0800266 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100268 cmd = ata_rw_cmds[index + fua + lba48 + write];
269 if (cmd) {
270 tf->command = cmd;
271 return 0;
272 }
273 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274}
275
Tejun Heocb95d562006-03-06 04:31:56 +0900276/**
Tejun Heo35b649f2006-11-14 22:37:35 +0900277 * ata_tf_read_block - Read block address from ATA taskfile
278 * @tf: ATA taskfile of interest
279 * @dev: ATA device @tf belongs to
280 *
281 * LOCKING:
282 * None.
283 *
284 * Read block address from @tf. This function can handle all
285 * three address formats - LBA, LBA48 and CHS. tf->protocol and
286 * flags select the address format to use.
287 *
288 * RETURNS:
289 * Block address read from @tf.
290 */
291u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
292{
293 u64 block = 0;
294
295 if (tf->flags & ATA_TFLAG_LBA) {
296 if (tf->flags & ATA_TFLAG_LBA48) {
297 block |= (u64)tf->hob_lbah << 40;
298 block |= (u64)tf->hob_lbam << 32;
299 block |= tf->hob_lbal << 24;
300 } else
301 block |= (tf->device & 0xf) << 24;
302
303 block |= tf->lbah << 16;
304 block |= tf->lbam << 8;
305 block |= tf->lbal;
306 } else {
307 u32 cyl, head, sect;
308
309 cyl = tf->lbam | (tf->lbah << 8);
310 head = tf->device & 0xf;
311 sect = tf->lbal;
312
313 block = (cyl * dev->heads + head) * dev->sectors + sect;
314 }
315
316 return block;
317}
318
319/**
Tejun Heobd056d72006-11-14 22:47:10 +0900320 * ata_build_rw_tf - Build ATA taskfile for given read/write request
321 * @tf: Target ATA taskfile
322 * @dev: ATA device @tf belongs to
323 * @block: Block address
324 * @n_block: Number of blocks
325 * @tf_flags: RW/FUA etc...
326 * @tag: tag
327 *
328 * LOCKING:
329 * None.
330 *
331 * Build ATA taskfile @tf for read/write request described by
332 * @block, @n_block, @tf_flags and @tag on @dev.
333 *
334 * RETURNS:
335 *
336 * 0 on success, -ERANGE if the request is too large for @dev,
337 * -EINVAL if the request is invalid.
338 */
339int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
340 u64 block, u32 n_block, unsigned int tf_flags,
341 unsigned int tag)
342{
343 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
344 tf->flags |= tf_flags;
345
Tejun Heo6d1245b2007-02-20 23:20:27 +0900346 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
Tejun Heobd056d72006-11-14 22:47:10 +0900347 /* yay, NCQ */
348 if (!lba_48_ok(block, n_block))
349 return -ERANGE;
350
351 tf->protocol = ATA_PROT_NCQ;
352 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
353
354 if (tf->flags & ATA_TFLAG_WRITE)
355 tf->command = ATA_CMD_FPDMA_WRITE;
356 else
357 tf->command = ATA_CMD_FPDMA_READ;
358
359 tf->nsect = tag << 3;
360 tf->hob_feature = (n_block >> 8) & 0xff;
361 tf->feature = n_block & 0xff;
362
363 tf->hob_lbah = (block >> 40) & 0xff;
364 tf->hob_lbam = (block >> 32) & 0xff;
365 tf->hob_lbal = (block >> 24) & 0xff;
366 tf->lbah = (block >> 16) & 0xff;
367 tf->lbam = (block >> 8) & 0xff;
368 tf->lbal = block & 0xff;
369
370 tf->device = 1 << 6;
371 if (tf->flags & ATA_TFLAG_FUA)
372 tf->device |= 1 << 7;
373 } else if (dev->flags & ATA_DFLAG_LBA) {
374 tf->flags |= ATA_TFLAG_LBA;
375
376 if (lba_28_ok(block, n_block)) {
377 /* use LBA28 */
378 tf->device |= (block >> 24) & 0xf;
379 } else if (lba_48_ok(block, n_block)) {
380 if (!(dev->flags & ATA_DFLAG_LBA48))
381 return -ERANGE;
382
383 /* use LBA48 */
384 tf->flags |= ATA_TFLAG_LBA48;
385
386 tf->hob_nsect = (n_block >> 8) & 0xff;
387
388 tf->hob_lbah = (block >> 40) & 0xff;
389 tf->hob_lbam = (block >> 32) & 0xff;
390 tf->hob_lbal = (block >> 24) & 0xff;
391 } else
392 /* request too large even for LBA48 */
393 return -ERANGE;
394
395 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
396 return -EINVAL;
397
398 tf->nsect = n_block & 0xff;
399
400 tf->lbah = (block >> 16) & 0xff;
401 tf->lbam = (block >> 8) & 0xff;
402 tf->lbal = block & 0xff;
403
404 tf->device |= ATA_LBA;
405 } else {
406 /* CHS */
407 u32 sect, head, cyl, track;
408
409 /* The request -may- be too large for CHS addressing. */
410 if (!lba_28_ok(block, n_block))
411 return -ERANGE;
412
413 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
414 return -EINVAL;
415
416 /* Convert LBA to CHS */
417 track = (u32)block / dev->sectors;
418 cyl = track / dev->heads;
419 head = track % dev->heads;
420 sect = (u32)block % dev->sectors + 1;
421
422 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
423 (u32)block, track, cyl, head, sect);
424
425 /* Check whether the converted CHS can fit.
426 Cylinder: 0-65535
427 Head: 0-15
428 Sector: 1-255*/
429 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
430 return -ERANGE;
431
432 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
433 tf->lbal = sect;
434 tf->lbam = cyl;
435 tf->lbah = cyl >> 8;
436 tf->device |= head;
437 }
438
439 return 0;
440}
441
442/**
Tejun Heocb95d562006-03-06 04:31:56 +0900443 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
444 * @pio_mask: pio_mask
445 * @mwdma_mask: mwdma_mask
446 * @udma_mask: udma_mask
447 *
448 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
449 * unsigned int xfer_mask.
450 *
451 * LOCKING:
452 * None.
453 *
454 * RETURNS:
455 * Packed xfer_mask.
456 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900457unsigned long ata_pack_xfermask(unsigned long pio_mask,
458 unsigned long mwdma_mask,
459 unsigned long udma_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900460{
461 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
462 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
463 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
464}
465
Tejun Heoc0489e42006-03-24 14:07:49 +0900466/**
467 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
468 * @xfer_mask: xfer_mask to unpack
469 * @pio_mask: resulting pio_mask
470 * @mwdma_mask: resulting mwdma_mask
471 * @udma_mask: resulting udma_mask
472 *
473 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
474 * Any NULL distination masks will be ignored.
475 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900476void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
477 unsigned long *mwdma_mask, unsigned long *udma_mask)
Tejun Heoc0489e42006-03-24 14:07:49 +0900478{
479 if (pio_mask)
480 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
481 if (mwdma_mask)
482 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
483 if (udma_mask)
484 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
485}
486
Tejun Heocb95d562006-03-06 04:31:56 +0900487static const struct ata_xfer_ent {
Tejun Heobe9a50c2006-03-31 22:48:52 +0900488 int shift, bits;
Tejun Heocb95d562006-03-06 04:31:56 +0900489 u8 base;
490} ata_xfer_tbl[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +0900491 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
492 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
493 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
Tejun Heocb95d562006-03-06 04:31:56 +0900494 { -1, },
495};
496
497/**
498 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
499 * @xfer_mask: xfer_mask of interest
500 *
501 * Return matching XFER_* value for @xfer_mask. Only the highest
502 * bit of @xfer_mask is considered.
503 *
504 * LOCKING:
505 * None.
506 *
507 * RETURNS:
Tejun Heo70cd0712007-11-27 19:43:40 +0900508 * Matching XFER_* value, 0xff if no match found.
Tejun Heocb95d562006-03-06 04:31:56 +0900509 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900510u8 ata_xfer_mask2mode(unsigned long xfer_mask)
Tejun Heocb95d562006-03-06 04:31:56 +0900511{
512 int highbit = fls(xfer_mask) - 1;
513 const struct ata_xfer_ent *ent;
514
515 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
516 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
517 return ent->base + highbit - ent->shift;
Tejun Heo70cd0712007-11-27 19:43:40 +0900518 return 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +0900519}
520
521/**
522 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
523 * @xfer_mode: XFER_* of interest
524 *
525 * Return matching xfer_mask for @xfer_mode.
526 *
527 * LOCKING:
528 * None.
529 *
530 * RETURNS:
531 * Matching xfer_mask, 0 if no match found.
532 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900533unsigned long ata_xfer_mode2mask(u8 xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900534{
535 const struct ata_xfer_ent *ent;
536
537 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
538 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
Tejun Heo70cd0712007-11-27 19:43:40 +0900539 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
540 & ~((1 << ent->shift) - 1);
Tejun Heocb95d562006-03-06 04:31:56 +0900541 return 0;
542}
543
544/**
545 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
546 * @xfer_mode: XFER_* of interest
547 *
548 * Return matching xfer_shift for @xfer_mode.
549 *
550 * LOCKING:
551 * None.
552 *
553 * RETURNS:
554 * Matching xfer_shift, -1 if no match found.
555 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900556int ata_xfer_mode2shift(unsigned long xfer_mode)
Tejun Heocb95d562006-03-06 04:31:56 +0900557{
558 const struct ata_xfer_ent *ent;
559
560 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
561 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
562 return ent->shift;
563 return -1;
564}
565
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566/**
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900567 * ata_mode_string - convert xfer_mask to string
568 * @xfer_mask: mask of bits supported; only highest bit counts.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 *
570 * Determine string which represents the highest speed
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900571 * (highest bit in @modemask).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 *
573 * LOCKING:
574 * None.
575 *
576 * RETURNS:
577 * Constant C string representing highest speed listed in
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900578 * @mode_mask, or the constant C string "<n/a>".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900580const char *ata_mode_string(unsigned long xfer_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581{
Tejun Heo75f554b2006-03-06 04:31:57 +0900582 static const char * const xfer_mode_str[] = {
583 "PIO0",
584 "PIO1",
585 "PIO2",
586 "PIO3",
587 "PIO4",
Alan Coxb352e572006-08-10 18:52:12 +0100588 "PIO5",
589 "PIO6",
Tejun Heo75f554b2006-03-06 04:31:57 +0900590 "MWDMA0",
591 "MWDMA1",
592 "MWDMA2",
Alan Coxb352e572006-08-10 18:52:12 +0100593 "MWDMA3",
594 "MWDMA4",
Tejun Heo75f554b2006-03-06 04:31:57 +0900595 "UDMA/16",
596 "UDMA/25",
597 "UDMA/33",
598 "UDMA/44",
599 "UDMA/66",
600 "UDMA/100",
601 "UDMA/133",
602 "UDMA7",
603 };
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900604 int highbit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900606 highbit = fls(xfer_mask) - 1;
607 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
608 return xfer_mode_str[highbit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 return "<n/a>";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610}
611
Tejun Heo4c360c82006-04-01 01:38:17 +0900612static const char *sata_spd_string(unsigned int spd)
613{
614 static const char * const spd_str[] = {
615 "1.5 Gbps",
616 "3.0 Gbps",
617 };
618
619 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
620 return "<unknown>";
621 return spd_str[spd - 1];
622}
623
Tejun Heo3373efd2006-05-15 20:57:53 +0900624void ata_dev_disable(struct ata_device *dev)
Tejun Heo0b8efb02006-03-24 15:25:31 +0900625{
Tejun Heo09d7f9b2007-06-25 23:34:02 +0900626 if (ata_dev_enabled(dev)) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900627 if (ata_msg_drv(dev->link->ap))
Tejun Heo09d7f9b2007-06-25 23:34:02 +0900628 ata_dev_printk(dev, KERN_WARNING, "disabled\n");
Tejun Heo562f0c22007-12-15 15:05:01 +0900629 ata_acpi_on_disable(dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +0900630 ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
631 ATA_DNXFER_QUIET);
Tejun Heo0b8efb02006-03-24 15:25:31 +0900632 dev->class++;
633 }
634}
635
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400636static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
637{
638 struct ata_link *link = dev->link;
639 struct ata_port *ap = link->ap;
640 u32 scontrol;
641 unsigned int err_mask;
642 int rc;
643
644 /*
645 * disallow DIPM for drivers which haven't set
646 * ATA_FLAG_IPM. This is because when DIPM is enabled,
647 * phy ready will be set in the interrupt status on
648 * state changes, which will cause some drivers to
649 * think there are errors - additionally drivers will
650 * need to disable hot plug.
651 */
652 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
653 ap->pm_policy = NOT_AVAILABLE;
654 return -EINVAL;
655 }
656
657 /*
658 * For DIPM, we will only enable it for the
659 * min_power setting.
660 *
661 * Why? Because Disks are too stupid to know that
662 * If the host rejects a request to go to SLUMBER
663 * they should retry at PARTIAL, and instead it
664 * just would give up. So, for medium_power to
665 * work at all, we need to only allow HIPM.
666 */
667 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
668 if (rc)
669 return rc;
670
671 switch (policy) {
672 case MIN_POWER:
673 /* no restrictions on IPM transitions */
674 scontrol &= ~(0x3 << 8);
675 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
676 if (rc)
677 return rc;
678
679 /* enable DIPM */
680 if (dev->flags & ATA_DFLAG_DIPM)
681 err_mask = ata_dev_set_feature(dev,
682 SETFEATURES_SATA_ENABLE, SATA_DIPM);
683 break;
684 case MEDIUM_POWER:
685 /* allow IPM to PARTIAL */
686 scontrol &= ~(0x1 << 8);
687 scontrol |= (0x2 << 8);
688 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
689 if (rc)
690 return rc;
691
Kristen Carlson Accardif5456b62007-11-02 16:37:08 -0700692 /*
693 * we don't have to disable DIPM since IPM flags
694 * disallow transitions to SLUMBER, which effectively
695 * disable DIPM if it does not support PARTIAL
696 */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400697 break;
698 case NOT_AVAILABLE:
699 case MAX_PERFORMANCE:
700 /* disable all IPM transitions */
701 scontrol |= (0x3 << 8);
702 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
703 if (rc)
704 return rc;
705
Kristen Carlson Accardif5456b62007-11-02 16:37:08 -0700706 /*
707 * we don't have to disable DIPM since IPM flags
708 * disallow all transitions which effectively
709 * disable DIPM anyway.
710 */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400711 break;
712 }
713
714 /* FIXME: handle SET FEATURES failure */
715 (void) err_mask;
716
717 return 0;
718}
719
720/**
721 * ata_dev_enable_pm - enable SATA interface power management
Stephen Hemminger48166fd2007-10-31 10:00:27 -0700722 * @dev: device to enable power management
723 * @policy: the link power management policy
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400724 *
725 * Enable SATA Interface power management. This will enable
726 * Device Interface Power Management (DIPM) for min_power
727 * policy, and then call driver specific callbacks for
728 * enabling Host Initiated Power management.
729 *
730 * Locking: Caller.
731 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
732 */
733void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
734{
735 int rc = 0;
736 struct ata_port *ap = dev->link->ap;
737
738 /* set HIPM first, then DIPM */
739 if (ap->ops->enable_pm)
740 rc = ap->ops->enable_pm(ap, policy);
741 if (rc)
742 goto enable_pm_out;
743 rc = ata_dev_set_dipm(dev, policy);
744
745enable_pm_out:
746 if (rc)
747 ap->pm_policy = MAX_PERFORMANCE;
748 else
749 ap->pm_policy = policy;
750 return /* rc */; /* hopefully we can use 'rc' eventually */
751}
752
Stephen Rothwell1992a5e2007-10-31 14:53:32 +1100753#ifdef CONFIG_PM
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400754/**
755 * ata_dev_disable_pm - disable SATA interface power management
Stephen Hemminger48166fd2007-10-31 10:00:27 -0700756 * @dev: device to disable power management
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400757 *
758 * Disable SATA Interface power management. This will disable
759 * Device Interface Power Management (DIPM) without changing
760 * policy, call driver specific callbacks for disabling Host
761 * Initiated Power management.
762 *
763 * Locking: Caller.
764 * Returns: void
765 */
766static void ata_dev_disable_pm(struct ata_device *dev)
767{
768 struct ata_port *ap = dev->link->ap;
769
770 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
771 if (ap->ops->disable_pm)
772 ap->ops->disable_pm(ap);
773}
Stephen Rothwell1992a5e2007-10-31 14:53:32 +1100774#endif /* CONFIG_PM */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400775
776void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
777{
778 ap->pm_policy = policy;
779 ap->link.eh_info.action |= ATA_EHI_LPM;
780 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
781 ata_port_schedule_eh(ap);
782}
783
Stephen Rothwell1992a5e2007-10-31 14:53:32 +1100784#ifdef CONFIG_PM
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400785static void ata_lpm_enable(struct ata_host *host)
786{
787 struct ata_link *link;
788 struct ata_port *ap;
789 struct ata_device *dev;
790 int i;
791
792 for (i = 0; i < host->n_ports; i++) {
793 ap = host->ports[i];
794 ata_port_for_each_link(link, ap) {
795 ata_link_for_each_dev(dev, link)
796 ata_dev_disable_pm(dev);
797 }
798 }
799}
800
801static void ata_lpm_disable(struct ata_host *host)
802{
803 int i;
804
805 for (i = 0; i < host->n_ports; i++) {
806 struct ata_port *ap = host->ports[i];
807 ata_lpm_schedule(ap, ap->pm_policy);
808 }
809}
Stephen Rothwell1992a5e2007-10-31 14:53:32 +1100810#endif /* CONFIG_PM */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400811
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 * ata_devchk - PATA device presence detection
815 * @ap: ATA channel to examine
816 * @device: Device to examine (starting at zero)
817 *
Tejun Heo0d5ff562007-02-01 15:06:36 +0900818 * This technique was originally described in
819 * Hale Landis's ATADRVR (www.ata-atapi.com), and
820 * later found its way into the ATA/ATAPI spec.
821 *
822 * Write a pattern to the ATA shadow registers,
823 * and if a device is present, it will respond by
824 * correctly storing and echoing back the
825 * ATA shadow register contents.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 *
827 * LOCKING:
828 * caller.
829 */
830
Tejun Heo0d5ff562007-02-01 15:06:36 +0900831static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900833 struct ata_ioports *ioaddr = &ap->ioaddr;
834 u8 nsect, lbal;
835
836 ap->ops->dev_select(ap, device);
837
838 iowrite8(0x55, ioaddr->nsect_addr);
839 iowrite8(0xaa, ioaddr->lbal_addr);
840
841 iowrite8(0xaa, ioaddr->nsect_addr);
842 iowrite8(0x55, ioaddr->lbal_addr);
843
844 iowrite8(0x55, ioaddr->nsect_addr);
845 iowrite8(0xaa, ioaddr->lbal_addr);
846
847 nsect = ioread8(ioaddr->nsect_addr);
848 lbal = ioread8(ioaddr->lbal_addr);
849
850 if ((nsect == 0x55) && (lbal == 0xaa))
851 return 1; /* we found a device */
852
853 return 0; /* nothing found */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854}
855
856/**
857 * ata_dev_classify - determine device type based on ATA-spec signature
858 * @tf: ATA taskfile register set for device to be identified
859 *
860 * Determine from taskfile register contents whether a device is
861 * ATA or ATAPI, as per "Signature and persistence" section
862 * of ATA/PI spec (volume 1, sect 5.14).
863 *
864 * LOCKING:
865 * None.
866 *
867 * RETURNS:
Tejun Heo633273a2007-09-23 13:19:54 +0900868 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
869 * %ATA_DEV_UNKNOWN the event of failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 */
Jeff Garzik057ace52005-10-22 14:27:05 -0400871unsigned int ata_dev_classify(const struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872{
873 /* Apple's open source Darwin code hints that some devices only
874 * put a proper signature into the LBA mid/high registers,
875 * So, we only check those. It's sufficient for uniqueness.
Tejun Heo633273a2007-09-23 13:19:54 +0900876 *
877 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
878 * signatures for ATA and ATAPI devices attached on SerialATA,
879 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
880 * spec has never mentioned about using different signatures
881 * for ATA/ATAPI devices. Then, Serial ATA II: Port
882 * Multiplier specification began to use 0x69/0x96 to identify
883 * port multpliers and 0x3c/0xc3 to identify SEMB device.
884 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
885 * 0x69/0x96 shortly and described them as reserved for
886 * SerialATA.
887 *
888 * We follow the current spec and consider that 0x69/0x96
889 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 */
Tejun Heo633273a2007-09-23 13:19:54 +0900891 if ((tf->lbam == 0) && (tf->lbah == 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 DPRINTK("found ATA device by sig\n");
893 return ATA_DEV_ATA;
894 }
895
Tejun Heo633273a2007-09-23 13:19:54 +0900896 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 DPRINTK("found ATAPI device by sig\n");
898 return ATA_DEV_ATAPI;
899 }
900
Tejun Heo633273a2007-09-23 13:19:54 +0900901 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
902 DPRINTK("found PMP device by sig\n");
903 return ATA_DEV_PMP;
904 }
905
906 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400907 printk(KERN_INFO "ata: SEMB device ignored\n");
Tejun Heo633273a2007-09-23 13:19:54 +0900908 return ATA_DEV_SEMB_UNSUP; /* not yet */
909 }
910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 DPRINTK("unknown device\n");
912 return ATA_DEV_UNKNOWN;
913}
914
915/**
916 * ata_dev_try_classify - Parse returned ATA device signature
Tejun Heo3f198592007-09-02 23:23:57 +0900917 * @dev: ATA device to classify (starting at zero)
918 * @present: device seems present
Tejun Heob4dc7622006-01-24 17:05:22 +0900919 * @r_err: Value of error register on completion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 *
921 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
922 * an ATA/ATAPI-defined set of values is placed in the ATA
923 * shadow registers, indicating the results of device detection
924 * and diagnostics.
925 *
926 * Select the ATA device, and read the values from the ATA shadow
927 * registers. Then parse according to the Error register value,
928 * and the spec-defined values examined by ata_dev_classify().
929 *
930 * LOCKING:
931 * caller.
Tejun Heob4dc7622006-01-24 17:05:22 +0900932 *
933 * RETURNS:
934 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 */
Tejun Heo3f198592007-09-02 23:23:57 +0900936unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
937 u8 *r_err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938{
Tejun Heo3f198592007-09-02 23:23:57 +0900939 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 struct ata_taskfile tf;
941 unsigned int class;
942 u8 err;
943
Tejun Heo3f198592007-09-02 23:23:57 +0900944 ap->ops->dev_select(ap, dev->devno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
946 memset(&tf, 0, sizeof(tf));
947
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 ap->ops->tf_read(ap, &tf);
Jeff Garzik0169e282005-10-29 21:25:10 -0400949 err = tf.feature;
Tejun Heob4dc7622006-01-24 17:05:22 +0900950 if (r_err)
951 *r_err = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Alan Cox93590852006-09-12 16:55:12 +0100953 /* see if device passed diags: if master then continue and warn later */
Tejun Heo3f198592007-09-02 23:23:57 +0900954 if (err == 0 && dev->devno == 0)
Alan Cox93590852006-09-12 16:55:12 +0100955 /* diagnostic fail : do nothing _YET_ */
Tejun Heo3f198592007-09-02 23:23:57 +0900956 dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
Alan Cox93590852006-09-12 16:55:12 +0100957 else if (err == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 /* do nothing */ ;
Tejun Heo3f198592007-09-02 23:23:57 +0900959 else if ((dev->devno == 0) && (err == 0x81))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 /* do nothing */ ;
961 else
Tejun Heob4dc7622006-01-24 17:05:22 +0900962 return ATA_DEV_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
Tejun Heob4dc7622006-01-24 17:05:22 +0900964 /* determine if device is ATA or ATAPI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 class = ata_dev_classify(&tf);
Tejun Heob4dc7622006-01-24 17:05:22 +0900966
Tejun Heod7fbee02007-09-02 23:24:48 +0900967 if (class == ATA_DEV_UNKNOWN) {
968 /* If the device failed diagnostic, it's likely to
969 * have reported incorrect device signature too.
970 * Assume ATA device if the device seems present but
971 * device signature is invalid with diagnostic
972 * failure.
973 */
974 if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC))
975 class = ATA_DEV_ATA;
976 else
977 class = ATA_DEV_NONE;
978 } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
979 class = ATA_DEV_NONE;
980
Tejun Heob4dc7622006-01-24 17:05:22 +0900981 return class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982}
983
984/**
Tejun Heo6a62a042006-02-13 10:02:46 +0900985 * ata_id_string - Convert IDENTIFY DEVICE page into string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 * @id: IDENTIFY DEVICE results we will examine
987 * @s: string into which data is output
988 * @ofs: offset into identify device page
989 * @len: length of string to return. must be an even number.
990 *
991 * The strings in the IDENTIFY DEVICE page are broken up into
992 * 16-bit chunks. Run through the string, and output each
993 * 8-bit chunk linearly, regardless of platform.
994 *
995 * LOCKING:
996 * caller.
997 */
998
Tejun Heo6a62a042006-02-13 10:02:46 +0900999void ata_id_string(const u16 *id, unsigned char *s,
1000 unsigned int ofs, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001{
1002 unsigned int c;
1003
1004 while (len > 0) {
1005 c = id[ofs] >> 8;
1006 *s = c;
1007 s++;
1008
1009 c = id[ofs] & 0xff;
1010 *s = c;
1011 s++;
1012
1013 ofs++;
1014 len -= 2;
1015 }
1016}
1017
Tejun Heo0e949ff2006-02-12 22:47:04 +09001018/**
Tejun Heo6a62a042006-02-13 10:02:46 +09001019 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
Tejun Heo0e949ff2006-02-12 22:47:04 +09001020 * @id: IDENTIFY DEVICE results we will examine
1021 * @s: string into which data is output
1022 * @ofs: offset into identify device page
1023 * @len: length of string to return. must be an odd number.
1024 *
Tejun Heo6a62a042006-02-13 10:02:46 +09001025 * This function is identical to ata_id_string except that it
Tejun Heo0e949ff2006-02-12 22:47:04 +09001026 * trims trailing spaces and terminates the resulting string with
1027 * null. @len must be actual maximum length (even number) + 1.
1028 *
1029 * LOCKING:
1030 * caller.
1031 */
Tejun Heo6a62a042006-02-13 10:02:46 +09001032void ata_id_c_string(const u16 *id, unsigned char *s,
1033 unsigned int ofs, unsigned int len)
Tejun Heo0e949ff2006-02-12 22:47:04 +09001034{
1035 unsigned char *p;
1036
1037 WARN_ON(!(len & 1));
1038
Tejun Heo6a62a042006-02-13 10:02:46 +09001039 ata_id_string(id, s, ofs, len - 1);
Tejun Heo0e949ff2006-02-12 22:47:04 +09001040
1041 p = s + strnlen(s, len - 1);
1042 while (p > s && p[-1] == ' ')
1043 p--;
1044 *p = '\0';
1045}
Edward Falk0baab862005-06-02 18:17:13 -04001046
Tejun Heodb6f8752007-09-03 12:31:58 +09001047static u64 ata_id_n_sectors(const u16 *id)
1048{
1049 if (ata_id_has_lba(id)) {
1050 if (ata_id_has_lba48(id))
1051 return ata_id_u64(id, 100);
1052 else
1053 return ata_id_u32(id, 60);
1054 } else {
1055 if (ata_id_current_chs_valid(id))
1056 return ata_id_u32(id, 57);
1057 else
1058 return id[1] * id[3] * id[6];
1059 }
1060}
1061
Alan Cox1e999732007-04-11 00:23:13 +01001062static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
1063{
1064 u64 sectors = 0;
1065
1066 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1067 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1068 sectors |= (tf->hob_lbal & 0xff) << 24;
1069 sectors |= (tf->lbah & 0xff) << 16;
1070 sectors |= (tf->lbam & 0xff) << 8;
1071 sectors |= (tf->lbal & 0xff);
1072
1073 return ++sectors;
1074}
1075
1076static u64 ata_tf_to_lba(struct ata_taskfile *tf)
1077{
1078 u64 sectors = 0;
1079
1080 sectors |= (tf->device & 0x0f) << 24;
1081 sectors |= (tf->lbah & 0xff) << 16;
1082 sectors |= (tf->lbam & 0xff) << 8;
1083 sectors |= (tf->lbal & 0xff);
1084
1085 return ++sectors;
1086}
1087
1088/**
Tejun Heoc728a912007-09-03 12:32:30 +09001089 * ata_read_native_max_address - Read native max address
1090 * @dev: target device
1091 * @max_sectors: out parameter for the result native max address
Alan Cox1e999732007-04-11 00:23:13 +01001092 *
Tejun Heoc728a912007-09-03 12:32:30 +09001093 * Perform an LBA48 or LBA28 native size query upon the device in
1094 * question.
1095 *
1096 * RETURNS:
1097 * 0 on success, -EACCES if command is aborted by the drive.
1098 * -EIO on other errors.
Alan Cox1e999732007-04-11 00:23:13 +01001099 */
Tejun Heoc728a912007-09-03 12:32:30 +09001100static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001101{
Tejun Heoc728a912007-09-03 12:32:30 +09001102 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001103 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001104 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001105
1106 ata_tf_init(dev, &tf);
1107
Tejun Heoc728a912007-09-03 12:32:30 +09001108 /* always clear all address registers */
Alan Cox1e999732007-04-11 00:23:13 +01001109 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001110
1111 if (lba48) {
1112 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1113 tf.flags |= ATA_TFLAG_LBA48;
1114 } else
1115 tf.command = ATA_CMD_READ_NATIVE_MAX;
1116
Alan Cox1e999732007-04-11 00:23:13 +01001117 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001118 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001119
Tejun Heo2b789102007-10-09 15:05:44 +09001120 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001121 if (err_mask) {
1122 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1123 "max address (err_mask=0x%x)\n", err_mask);
1124 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1125 return -EACCES;
1126 return -EIO;
1127 }
Alan Cox1e999732007-04-11 00:23:13 +01001128
Tejun Heoc728a912007-09-03 12:32:30 +09001129 if (lba48)
1130 *max_sectors = ata_tf_to_lba48(&tf);
1131 else
1132 *max_sectors = ata_tf_to_lba(&tf);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001133 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
Alan Cox93328e12007-09-29 04:06:48 -04001134 (*max_sectors)--;
Tejun Heoc728a912007-09-03 12:32:30 +09001135 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001136}
1137
1138/**
Tejun Heoc728a912007-09-03 12:32:30 +09001139 * ata_set_max_sectors - Set max sectors
1140 * @dev: target device
Randy Dunlap6b38d1d2007-05-01 17:35:55 -07001141 * @new_sectors: new max sectors value to set for the device
Alan Cox1e999732007-04-11 00:23:13 +01001142 *
Tejun Heoc728a912007-09-03 12:32:30 +09001143 * Set max sectors of @dev to @new_sectors.
1144 *
1145 * RETURNS:
1146 * 0 on success, -EACCES if command is aborted or denied (due to
1147 * previous non-volatile SET_MAX) by the drive. -EIO on other
1148 * errors.
Alan Cox1e999732007-04-11 00:23:13 +01001149 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001150static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
Alan Cox1e999732007-04-11 00:23:13 +01001151{
Tejun Heoc728a912007-09-03 12:32:30 +09001152 unsigned int err_mask;
Alan Cox1e999732007-04-11 00:23:13 +01001153 struct ata_taskfile tf;
Tejun Heoc728a912007-09-03 12:32:30 +09001154 int lba48 = ata_id_has_lba48(dev->id);
Alan Cox1e999732007-04-11 00:23:13 +01001155
1156 new_sectors--;
1157
1158 ata_tf_init(dev, &tf);
1159
Alan Cox1e999732007-04-11 00:23:13 +01001160 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
Tejun Heoc728a912007-09-03 12:32:30 +09001161
1162 if (lba48) {
1163 tf.command = ATA_CMD_SET_MAX_EXT;
1164 tf.flags |= ATA_TFLAG_LBA48;
1165
1166 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1167 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1168 tf.hob_lbah = (new_sectors >> 40) & 0xff;
Tejun Heo1e582ba2007-09-21 20:07:14 +09001169 } else {
Tejun Heoc728a912007-09-03 12:32:30 +09001170 tf.command = ATA_CMD_SET_MAX;
1171
Tejun Heo1e582ba2007-09-21 20:07:14 +09001172 tf.device |= (new_sectors >> 24) & 0xf;
1173 }
1174
Alan Cox1e999732007-04-11 00:23:13 +01001175 tf.protocol |= ATA_PROT_NODATA;
Tejun Heoc728a912007-09-03 12:32:30 +09001176 tf.device |= ATA_LBA;
Alan Cox1e999732007-04-11 00:23:13 +01001177
1178 tf.lbal = (new_sectors >> 0) & 0xff;
1179 tf.lbam = (new_sectors >> 8) & 0xff;
1180 tf.lbah = (new_sectors >> 16) & 0xff;
Alan Cox1e999732007-04-11 00:23:13 +01001181
Tejun Heo2b789102007-10-09 15:05:44 +09001182 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoc728a912007-09-03 12:32:30 +09001183 if (err_mask) {
1184 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1185 "max address (err_mask=0x%x)\n", err_mask);
1186 if (err_mask == AC_ERR_DEV &&
1187 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1188 return -EACCES;
1189 return -EIO;
1190 }
Alan Cox1e999732007-04-11 00:23:13 +01001191
Tejun Heoc728a912007-09-03 12:32:30 +09001192 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001193}
1194
1195/**
1196 * ata_hpa_resize - Resize a device with an HPA set
1197 * @dev: Device to resize
1198 *
1199 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1200 * it if required to the full size of the media. The caller must check
1201 * the drive has the HPA feature set enabled.
Tejun Heo05027ad2007-09-03 12:32:57 +09001202 *
1203 * RETURNS:
1204 * 0 on success, -errno on failure.
Alan Cox1e999732007-04-11 00:23:13 +01001205 */
Tejun Heo05027ad2007-09-03 12:32:57 +09001206static int ata_hpa_resize(struct ata_device *dev)
Alan Cox1e999732007-04-11 00:23:13 +01001207{
Tejun Heo05027ad2007-09-03 12:32:57 +09001208 struct ata_eh_context *ehc = &dev->link->eh_context;
1209 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1210 u64 sectors = ata_id_n_sectors(dev->id);
1211 u64 native_sectors;
Tejun Heoc728a912007-09-03 12:32:30 +09001212 int rc;
Jeff Garzika617c092007-05-21 20:14:23 -04001213
Tejun Heo05027ad2007-09-03 12:32:57 +09001214 /* do we need to do it? */
1215 if (dev->class != ATA_DEV_ATA ||
1216 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1217 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
Tejun Heoc728a912007-09-03 12:32:30 +09001218 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001219
Tejun Heo05027ad2007-09-03 12:32:57 +09001220 /* read native max address */
1221 rc = ata_read_native_max_address(dev, &native_sectors);
1222 if (rc) {
1223 /* If HPA isn't going to be unlocked, skip HPA
1224 * resizing from the next try.
1225 */
1226 if (!ata_ignore_hpa) {
1227 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1228 "broken, will skip HPA handling\n");
1229 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
Alan Cox1e999732007-04-11 00:23:13 +01001230
Tejun Heo05027ad2007-09-03 12:32:57 +09001231 /* we can continue if device aborted the command */
1232 if (rc == -EACCES)
1233 rc = 0;
Alan Cox1e999732007-04-11 00:23:13 +01001234 }
Tejun Heo37301a52007-06-25 20:45:54 +09001235
Tejun Heo05027ad2007-09-03 12:32:57 +09001236 return rc;
1237 }
1238
1239 /* nothing to do? */
1240 if (native_sectors <= sectors || !ata_ignore_hpa) {
1241 if (!print_info || native_sectors == sectors)
1242 return 0;
1243
1244 if (native_sectors > sectors)
1245 ata_dev_printk(dev, KERN_INFO,
1246 "HPA detected: current %llu, native %llu\n",
1247 (unsigned long long)sectors,
1248 (unsigned long long)native_sectors);
1249 else if (native_sectors < sectors)
1250 ata_dev_printk(dev, KERN_WARNING,
1251 "native sectors (%llu) is smaller than "
1252 "sectors (%llu)\n",
1253 (unsigned long long)native_sectors,
1254 (unsigned long long)sectors);
1255 return 0;
1256 }
1257
1258 /* let's unlock HPA */
1259 rc = ata_set_max_sectors(dev, native_sectors);
1260 if (rc == -EACCES) {
1261 /* if device aborted the command, skip HPA resizing */
1262 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1263 "(%llu -> %llu), skipping HPA handling\n",
1264 (unsigned long long)sectors,
1265 (unsigned long long)native_sectors);
1266 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1267 return 0;
1268 } else if (rc)
1269 return rc;
1270
1271 /* re-read IDENTIFY data */
1272 rc = ata_dev_reread_id(dev, 0);
1273 if (rc) {
1274 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1275 "data after HPA resizing\n");
1276 return rc;
1277 }
1278
1279 if (print_info) {
1280 u64 new_sectors = ata_id_n_sectors(dev->id);
1281 ata_dev_printk(dev, KERN_INFO,
1282 "HPA unlocked: %llu -> %llu, native %llu\n",
1283 (unsigned long long)sectors,
1284 (unsigned long long)new_sectors,
1285 (unsigned long long)native_sectors);
1286 }
1287
1288 return 0;
Alan Cox1e999732007-04-11 00:23:13 +01001289}
1290
Edward Falk0baab862005-06-02 18:17:13 -04001291/**
1292 * ata_noop_dev_select - Select device 0/1 on ATA bus
1293 * @ap: ATA channel to manipulate
1294 * @device: ATA device (numbered from zero) to select
1295 *
1296 * This function performs no actual function.
1297 *
1298 * May be used as the dev_select() entry in ata_port_operations.
1299 *
1300 * LOCKING:
1301 * caller.
1302 */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001303void ata_noop_dev_select(struct ata_port *ap, unsigned int device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304{
1305}
1306
Edward Falk0baab862005-06-02 18:17:13 -04001307
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308/**
1309 * ata_std_dev_select - Select device 0/1 on ATA bus
1310 * @ap: ATA channel to manipulate
1311 * @device: ATA device (numbered from zero) to select
1312 *
1313 * Use the method defined in the ATA specification to
1314 * make either device 0, or device 1, active on the
Edward Falk0baab862005-06-02 18:17:13 -04001315 * ATA channel. Works with both PIO and MMIO.
1316 *
1317 * May be used as the dev_select() entry in ata_port_operations.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 *
1319 * LOCKING:
1320 * caller.
1321 */
1322
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001323void ata_std_dev_select(struct ata_port *ap, unsigned int device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324{
1325 u8 tmp;
1326
1327 if (device == 0)
1328 tmp = ATA_DEVICE_OBS;
1329 else
1330 tmp = ATA_DEVICE_OBS | ATA_DEV1;
1331
Tejun Heo0d5ff562007-02-01 15:06:36 +09001332 iowrite8(tmp, ap->ioaddr.device_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 ata_pause(ap); /* needed; also flushes, for mmio */
1334}
1335
1336/**
1337 * ata_dev_select - Select device 0/1 on ATA bus
1338 * @ap: ATA channel to manipulate
1339 * @device: ATA device (numbered from zero) to select
1340 * @wait: non-zero to wait for Status register BSY bit to clear
1341 * @can_sleep: non-zero if context allows sleeping
1342 *
1343 * Use the method defined in the ATA specification to
1344 * make either device 0, or device 1, active on the
1345 * ATA channel.
1346 *
1347 * This is a high-level version of ata_std_dev_select(),
1348 * which additionally provides the services of inserting
1349 * the proper pauses and status polling, where needed.
1350 *
1351 * LOCKING:
1352 * caller.
1353 */
1354
1355void ata_dev_select(struct ata_port *ap, unsigned int device,
1356 unsigned int wait, unsigned int can_sleep)
1357{
Tejun Heo88574552006-06-25 20:00:35 +09001358 if (ata_msg_probe(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001359 ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, "
1360 "device %u, wait %u\n", device, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
1362 if (wait)
1363 ata_wait_idle(ap);
1364
1365 ap->ops->dev_select(ap, device);
1366
1367 if (wait) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001368 if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 msleep(150);
1370 ata_wait_idle(ap);
1371 }
1372}
1373
1374/**
1375 * ata_dump_id - IDENTIFY DEVICE info debugging output
Tejun Heo0bd33002006-02-12 22:47:05 +09001376 * @id: IDENTIFY DEVICE page to dump
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 *
Tejun Heo0bd33002006-02-12 22:47:05 +09001378 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1379 * page.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 *
1381 * LOCKING:
1382 * caller.
1383 */
1384
Tejun Heo0bd33002006-02-12 22:47:05 +09001385static inline void ata_dump_id(const u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386{
1387 DPRINTK("49==0x%04x "
1388 "53==0x%04x "
1389 "63==0x%04x "
1390 "64==0x%04x "
1391 "75==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001392 id[49],
1393 id[53],
1394 id[63],
1395 id[64],
1396 id[75]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 DPRINTK("80==0x%04x "
1398 "81==0x%04x "
1399 "82==0x%04x "
1400 "83==0x%04x "
1401 "84==0x%04x \n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001402 id[80],
1403 id[81],
1404 id[82],
1405 id[83],
1406 id[84]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 DPRINTK("88==0x%04x "
1408 "93==0x%04x\n",
Tejun Heo0bd33002006-02-12 22:47:05 +09001409 id[88],
1410 id[93]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411}
1412
Tejun Heocb95d562006-03-06 04:31:56 +09001413/**
1414 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1415 * @id: IDENTIFY data to compute xfer mask from
1416 *
1417 * Compute the xfermask for this device. This is not as trivial
1418 * as it seems if we must consider early devices correctly.
1419 *
1420 * FIXME: pre IDE drive timing (do we care ?).
1421 *
1422 * LOCKING:
1423 * None.
1424 *
1425 * RETURNS:
1426 * Computed xfermask
1427 */
Tejun Heo7dc951a2007-11-27 19:43:42 +09001428unsigned long ata_id_xfermask(const u16 *id)
Tejun Heocb95d562006-03-06 04:31:56 +09001429{
Tejun Heo7dc951a2007-11-27 19:43:42 +09001430 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heocb95d562006-03-06 04:31:56 +09001431
1432 /* Usual case. Word 53 indicates word 64 is valid */
1433 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1434 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1435 pio_mask <<= 3;
1436 pio_mask |= 0x7;
1437 } else {
1438 /* If word 64 isn't valid then Word 51 high byte holds
1439 * the PIO timing number for the maximum. Turn it into
1440 * a mask.
1441 */
Lennert Buytenhek7a0f1c82007-01-29 13:28:47 +01001442 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
Alan Cox46767aeb2006-09-29 18:26:47 +01001443 if (mode < 5) /* Valid PIO range */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001444 pio_mask = (2 << mode) - 1;
Alan Cox46767aeb2006-09-29 18:26:47 +01001445 else
1446 pio_mask = 1;
Tejun Heocb95d562006-03-06 04:31:56 +09001447
1448 /* But wait.. there's more. Design your standards by
1449 * committee and you too can get a free iordy field to
1450 * process. However its the speeds not the modes that
1451 * are supported... Note drivers using the timing API
1452 * will get this right anyway
1453 */
1454 }
1455
1456 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
Tejun Heofb21f0d2006-03-12 12:34:35 +09001457
Alan Coxb352e572006-08-10 18:52:12 +01001458 if (ata_id_is_cfa(id)) {
1459 /*
1460 * Process compact flash extended modes
1461 */
1462 int pio = id[163] & 0x7;
1463 int dma = (id[163] >> 3) & 7;
1464
1465 if (pio)
1466 pio_mask |= (1 << 5);
1467 if (pio > 1)
1468 pio_mask |= (1 << 6);
1469 if (dma)
1470 mwdma_mask |= (1 << 3);
1471 if (dma > 1)
1472 mwdma_mask |= (1 << 4);
1473 }
1474
Tejun Heofb21f0d2006-03-12 12:34:35 +09001475 udma_mask = 0;
1476 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1477 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
Tejun Heocb95d562006-03-06 04:31:56 +09001478
1479 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1480}
1481
Tejun Heo86e45b62006-03-05 15:29:09 +09001482/**
1483 * ata_port_queue_task - Queue port_task
1484 * @ap: The ata_port to queue port_task for
Randy Dunlape2a7f772006-05-18 10:50:18 -07001485 * @fn: workqueue function to be scheduled
David Howells65f27f32006-11-22 14:55:48 +00001486 * @data: data for @fn to use
Randy Dunlape2a7f772006-05-18 10:50:18 -07001487 * @delay: delay time for workqueue function
Tejun Heo86e45b62006-03-05 15:29:09 +09001488 *
1489 * Schedule @fn(@data) for execution after @delay jiffies using
1490 * port_task. There is one port_task per port and it's the
1491 * user(low level driver)'s responsibility to make sure that only
1492 * one task is active at any given time.
1493 *
1494 * libata core layer takes care of synchronization between
1495 * port_task and EH. ata_port_queue_task() may be ignored for EH
1496 * synchronization.
1497 *
1498 * LOCKING:
1499 * Inherited from caller.
1500 */
David Howells65f27f32006-11-22 14:55:48 +00001501void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data,
Tejun Heo86e45b62006-03-05 15:29:09 +09001502 unsigned long delay)
1503{
David Howells65f27f32006-11-22 14:55:48 +00001504 PREPARE_DELAYED_WORK(&ap->port_task, fn);
1505 ap->port_task_data = data;
Tejun Heo86e45b62006-03-05 15:29:09 +09001506
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001507 /* may fail if ata_port_flush_task() in progress */
1508 queue_delayed_work(ata_wq, &ap->port_task, delay);
Tejun Heo86e45b62006-03-05 15:29:09 +09001509}
1510
1511/**
1512 * ata_port_flush_task - Flush port_task
1513 * @ap: The ata_port to flush port_task for
1514 *
1515 * After this function completes, port_task is guranteed not to
1516 * be running or scheduled.
1517 *
1518 * LOCKING:
1519 * Kernel thread context (may sleep)
1520 */
1521void ata_port_flush_task(struct ata_port *ap)
1522{
Tejun Heo86e45b62006-03-05 15:29:09 +09001523 DPRINTK("ENTER\n");
1524
Oleg Nesterov45a66c12007-07-09 11:46:13 -07001525 cancel_rearming_delayed_work(&ap->port_task);
Tejun Heo86e45b62006-03-05 15:29:09 +09001526
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001527 if (ata_msg_ctl(ap))
1528 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
Tejun Heo86e45b62006-03-05 15:29:09 +09001529}
1530
Adrian Bunk7102d232007-01-04 00:09:36 +01001531static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001532{
Tejun Heo77853bf2006-01-23 13:09:36 +09001533 struct completion *waiting = qc->private_data;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001534
Tejun Heoa2a7a662005-12-13 14:48:31 +09001535 complete(waiting);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001536}
1537
1538/**
Tejun Heo24326972006-11-14 22:47:09 +09001539 * ata_exec_internal_sg - execute libata internal command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001540 * @dev: Device to which the command is sent
1541 * @tf: Taskfile registers for the command and the result
Tejun Heod69cf372006-04-02 18:51:53 +09001542 * @cdb: CDB for packet command
Tejun Heoa2a7a662005-12-13 14:48:31 +09001543 * @dma_dir: Data tranfer direction of the command
Randy Dunlap5c1ad8b2007-10-18 14:12:26 -07001544 * @sgl: sg list for the data buffer of the command
Tejun Heo24326972006-11-14 22:47:09 +09001545 * @n_elem: Number of sg entries
Tejun Heo2b789102007-10-09 15:05:44 +09001546 * @timeout: Timeout in msecs (0 for default)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001547 *
1548 * Executes libata internal command with timeout. @tf contains
1549 * command on entry and result on return. Timeout and error
1550 * conditions are reported via return value. No recovery action
1551 * is taken after a command times out. It's caller's duty to
1552 * clean up after timeout.
1553 *
1554 * LOCKING:
1555 * None. Should be called with kernel context, might sleep.
Tejun Heo551e8882006-06-12 14:09:49 +09001556 *
1557 * RETURNS:
1558 * Zero on success, AC_ERR_* mask on failure
Tejun Heoa2a7a662005-12-13 14:48:31 +09001559 */
Tejun Heo24326972006-11-14 22:47:09 +09001560unsigned ata_exec_internal_sg(struct ata_device *dev,
1561 struct ata_taskfile *tf, const u8 *cdb,
Jens Axboe87260212007-10-16 11:14:12 +02001562 int dma_dir, struct scatterlist *sgl,
Tejun Heo2b789102007-10-09 15:05:44 +09001563 unsigned int n_elem, unsigned long timeout)
Tejun Heoa2a7a662005-12-13 14:48:31 +09001564{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001565 struct ata_link *link = dev->link;
1566 struct ata_port *ap = link->ap;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001567 u8 command = tf->command;
1568 struct ata_queued_cmd *qc;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001569 unsigned int tag, preempted_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001570 u32 preempted_sactive, preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001571 int preempted_nr_active_links;
Ingo Molnar60be6b92006-07-03 00:25:26 -07001572 DECLARE_COMPLETION_ONSTACK(wait);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001573 unsigned long flags;
Tejun Heo77853bf2006-01-23 13:09:36 +09001574 unsigned int err_mask;
Tejun Heod95a7172006-05-15 20:58:14 +09001575 int rc;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001576
Jeff Garzikba6a1302006-06-22 23:46:10 -04001577 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001578
Tejun Heoe3180492006-05-15 20:58:09 +09001579 /* no internal command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09001580 if (ap->pflags & ATA_PFLAG_FROZEN) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001581 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoe3180492006-05-15 20:58:09 +09001582 return AC_ERR_SYSTEM;
1583 }
1584
Tejun Heo2ab7db12006-05-15 20:58:02 +09001585 /* initialize internal qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001586
Tejun Heo2ab7db12006-05-15 20:58:02 +09001587 /* XXX: Tag 0 is used for drivers with legacy EH as some
1588 * drivers choke if any other tag is given. This breaks
1589 * ata_tag_internal() test for those drivers. Don't use new
1590 * EH stuff without converting to it.
1591 */
1592 if (ap->ops->error_handler)
1593 tag = ATA_TAG_INTERNAL;
1594 else
1595 tag = 0;
1596
Tejun Heo6cec4a32006-05-15 21:03:41 +09001597 if (test_and_set_bit(tag, &ap->qc_allocated))
Tejun Heo2ab7db12006-05-15 20:58:02 +09001598 BUG();
Tejun Heof69499f2006-05-15 20:58:03 +09001599 qc = __ata_qc_from_tag(ap, tag);
Tejun Heo2ab7db12006-05-15 20:58:02 +09001600
1601 qc->tag = tag;
1602 qc->scsicmd = NULL;
1603 qc->ap = ap;
1604 qc->dev = dev;
1605 ata_qc_reinit(qc);
1606
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001607 preempted_tag = link->active_tag;
1608 preempted_sactive = link->sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001609 preempted_qc_active = ap->qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001610 preempted_nr_active_links = ap->nr_active_links;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001611 link->active_tag = ATA_TAG_POISON;
1612 link->sactive = 0;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001613 ap->qc_active = 0;
Tejun Heoda917d62007-09-23 13:14:12 +09001614 ap->nr_active_links = 0;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001615
1616 /* prepare & issue qc */
Tejun Heoa2a7a662005-12-13 14:48:31 +09001617 qc->tf = *tf;
Tejun Heod69cf372006-04-02 18:51:53 +09001618 if (cdb)
1619 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
Tejun Heoe61e0672006-05-15 20:57:40 +09001620 qc->flags |= ATA_QCFLAG_RESULT_TF;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001621 qc->dma_dir = dma_dir;
1622 if (dma_dir != DMA_NONE) {
Tejun Heo24326972006-11-14 22:47:09 +09001623 unsigned int i, buflen = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001624 struct scatterlist *sg;
Tejun Heo24326972006-11-14 22:47:09 +09001625
Jens Axboe87260212007-10-16 11:14:12 +02001626 for_each_sg(sgl, sg, n_elem, i)
1627 buflen += sg->length;
Tejun Heo24326972006-11-14 22:47:09 +09001628
Jens Axboe87260212007-10-16 11:14:12 +02001629 ata_sg_init(qc, sgl, n_elem);
Brian King49c80422007-01-30 11:32:26 -06001630 qc->nbytes = buflen;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001631 }
1632
Tejun Heo77853bf2006-01-23 13:09:36 +09001633 qc->private_data = &wait;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001634 qc->complete_fn = ata_qc_complete_internal;
1635
Tejun Heo8e0e6942006-03-31 20:41:11 +09001636 ata_qc_issue(qc);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001637
Jeff Garzikba6a1302006-06-22 23:46:10 -04001638 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001639
Tejun Heo2b789102007-10-09 15:05:44 +09001640 if (!timeout)
1641 timeout = ata_probe_timeout * 1000 / HZ;
1642
1643 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
Albert Lee41ade502006-03-14 11:19:04 +08001644
Tejun Heod95a7172006-05-15 20:58:14 +09001645 ata_port_flush_task(ap);
1646
1647 if (!rc) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04001648 spin_lock_irqsave(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001649
1650 /* We're racing with irq here. If we lose, the
1651 * following test prevents us from completing the qc
Tejun Heod95a7172006-05-15 20:58:14 +09001652 * twice. If we win, the port is frozen and will be
1653 * cleaned up by ->post_internal_cmd().
Tejun Heoa2a7a662005-12-13 14:48:31 +09001654 */
Tejun Heo77853bf2006-01-23 13:09:36 +09001655 if (qc->flags & ATA_QCFLAG_ACTIVE) {
Tejun Heod95a7172006-05-15 20:58:14 +09001656 qc->err_mask |= AC_ERR_TIMEOUT;
1657
1658 if (ap->ops->error_handler)
1659 ata_port_freeze(ap);
1660 else
1661 ata_qc_complete(qc);
Tejun Heof15a1da2006-05-15 20:57:56 +09001662
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001663 if (ata_msg_warn(ap))
1664 ata_dev_printk(dev, KERN_WARNING,
Tejun Heo88574552006-06-25 20:00:35 +09001665 "qc timeout (cmd 0x%x)\n", command);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001666 }
1667
Jeff Garzikba6a1302006-06-22 23:46:10 -04001668 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoa2a7a662005-12-13 14:48:31 +09001669 }
1670
Tejun Heod95a7172006-05-15 20:58:14 +09001671 /* do post_internal_cmd */
1672 if (ap->ops->post_internal_cmd)
1673 ap->ops->post_internal_cmd(qc);
1674
Tejun Heoa51d6442007-03-20 15:24:11 +09001675 /* perform minimal error analysis */
1676 if (qc->flags & ATA_QCFLAG_FAILED) {
1677 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1678 qc->err_mask |= AC_ERR_DEV;
1679
1680 if (!qc->err_mask)
1681 qc->err_mask |= AC_ERR_OTHER;
1682
1683 if (qc->err_mask & ~AC_ERR_OTHER)
1684 qc->err_mask &= ~AC_ERR_OTHER;
Tejun Heod95a7172006-05-15 20:58:14 +09001685 }
1686
Tejun Heo15869302006-05-15 20:57:33 +09001687 /* finish up */
Jeff Garzikba6a1302006-06-22 23:46:10 -04001688 spin_lock_irqsave(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001689
Tejun Heoe61e0672006-05-15 20:57:40 +09001690 *tf = qc->result_tf;
Tejun Heo77853bf2006-01-23 13:09:36 +09001691 err_mask = qc->err_mask;
1692
1693 ata_qc_free(qc);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001694 link->active_tag = preempted_tag;
1695 link->sactive = preempted_sactive;
Tejun Heodedaf2b2006-05-15 21:03:43 +09001696 ap->qc_active = preempted_qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +09001697 ap->nr_active_links = preempted_nr_active_links;
Tejun Heo77853bf2006-01-23 13:09:36 +09001698
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001699 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1700 * Until those drivers are fixed, we detect the condition
1701 * here, fail the command with AC_ERR_SYSTEM and reenable the
1702 * port.
1703 *
1704 * Note that this doesn't change any behavior as internal
1705 * command failure results in disabling the device in the
1706 * higher layer for LLDDs without new reset/EH callbacks.
1707 *
1708 * Kill the following code as soon as those drivers are fixed.
1709 */
Tejun Heo198e0fe2006-04-02 18:51:52 +09001710 if (ap->flags & ATA_FLAG_DISABLED) {
Tejun Heo1f7dd3e92006-03-24 15:25:30 +09001711 err_mask |= AC_ERR_SYSTEM;
1712 ata_port_probe(ap);
1713 }
1714
Jeff Garzikba6a1302006-06-22 23:46:10 -04001715 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo15869302006-05-15 20:57:33 +09001716
Tejun Heo77853bf2006-01-23 13:09:36 +09001717 return err_mask;
Tejun Heoa2a7a662005-12-13 14:48:31 +09001718}
1719
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720/**
Tejun Heo33480a02006-12-12 02:15:31 +09001721 * ata_exec_internal - execute libata internal command
Tejun Heo24326972006-11-14 22:47:09 +09001722 * @dev: Device to which the command is sent
1723 * @tf: Taskfile registers for the command and the result
1724 * @cdb: CDB for packet command
1725 * @dma_dir: Data tranfer direction of the command
1726 * @buf: Data buffer of the command
1727 * @buflen: Length of data buffer
Tejun Heo2b789102007-10-09 15:05:44 +09001728 * @timeout: Timeout in msecs (0 for default)
Tejun Heo24326972006-11-14 22:47:09 +09001729 *
1730 * Wrapper around ata_exec_internal_sg() which takes simple
1731 * buffer instead of sg list.
1732 *
1733 * LOCKING:
1734 * None. Should be called with kernel context, might sleep.
1735 *
1736 * RETURNS:
1737 * Zero on success, AC_ERR_* mask on failure
1738 */
1739unsigned ata_exec_internal(struct ata_device *dev,
1740 struct ata_taskfile *tf, const u8 *cdb,
Tejun Heo2b789102007-10-09 15:05:44 +09001741 int dma_dir, void *buf, unsigned int buflen,
1742 unsigned long timeout)
Tejun Heo24326972006-11-14 22:47:09 +09001743{
Tejun Heo33480a02006-12-12 02:15:31 +09001744 struct scatterlist *psg = NULL, sg;
1745 unsigned int n_elem = 0;
Tejun Heo24326972006-11-14 22:47:09 +09001746
Tejun Heo33480a02006-12-12 02:15:31 +09001747 if (dma_dir != DMA_NONE) {
1748 WARN_ON(!buf);
1749 sg_init_one(&sg, buf, buflen);
1750 psg = &sg;
1751 n_elem++;
1752 }
Tejun Heo24326972006-11-14 22:47:09 +09001753
Tejun Heo2b789102007-10-09 15:05:44 +09001754 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1755 timeout);
Tejun Heo24326972006-11-14 22:47:09 +09001756}
1757
1758/**
Tejun Heo977e6b92006-06-24 20:30:19 +09001759 * ata_do_simple_cmd - execute simple internal command
1760 * @dev: Device to which the command is sent
1761 * @cmd: Opcode to execute
1762 *
1763 * Execute a 'simple' command, that only consists of the opcode
1764 * 'cmd' itself, without filling any other registers
1765 *
1766 * LOCKING:
1767 * Kernel thread context (may sleep).
1768 *
1769 * RETURNS:
1770 * Zero on success, AC_ERR_* mask on failure
Tejun Heoe58eb582006-06-24 20:30:19 +09001771 */
Tejun Heo77b08fb2006-06-24 20:30:19 +09001772unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
Tejun Heoe58eb582006-06-24 20:30:19 +09001773{
1774 struct ata_taskfile tf;
Tejun Heoe58eb582006-06-24 20:30:19 +09001775
1776 ata_tf_init(dev, &tf);
1777
1778 tf.command = cmd;
1779 tf.flags |= ATA_TFLAG_DEVICE;
1780 tf.protocol = ATA_PROT_NODATA;
1781
Tejun Heo2b789102007-10-09 15:05:44 +09001782 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Tejun Heoe58eb582006-06-24 20:30:19 +09001783}
1784
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785/**
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001786 * ata_pio_need_iordy - check if iordy needed
1787 * @adev: ATA device
1788 *
1789 * Check if the current speed of the device requires IORDY. Used
1790 * by various controllers for chip configuration.
1791 */
Jeff Garzika617c092007-05-21 20:14:23 -04001792
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001793unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1794{
Alan Cox432729f2007-03-08 23:22:59 +00001795 /* Controller doesn't support IORDY. Probably a pointless check
1796 as the caller should know this */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001797 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001798 return 0;
Alan Cox432729f2007-03-08 23:22:59 +00001799 /* PIO3 and higher it is mandatory */
1800 if (adev->pio_mode > XFER_PIO_2)
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001801 return 1;
Alan Cox432729f2007-03-08 23:22:59 +00001802 /* We turn it on when possible */
1803 if (ata_id_has_iordy(adev->id))
1804 return 1;
1805 return 0;
1806}
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05001807
Alan Cox432729f2007-03-08 23:22:59 +00001808/**
1809 * ata_pio_mask_no_iordy - Return the non IORDY mask
1810 * @adev: ATA device
1811 *
1812 * Compute the highest mode possible if we are not using iordy. Return
1813 * -1 if no iordy mode is available.
1814 */
Jeff Garzika617c092007-05-21 20:14:23 -04001815
Alan Cox432729f2007-03-08 23:22:59 +00001816static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1817{
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001818 /* If we have no drive specific rule, then PIO 2 is non IORDY */
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001819 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
Alan Cox432729f2007-03-08 23:22:59 +00001820 u16 pio = adev->id[ATA_ID_EIDE_PIO];
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001821 /* Is the speed faster than the drive allows non IORDY ? */
1822 if (pio) {
1823 /* This is cycle times not frequency - watch the logic! */
1824 if (pio > 240) /* PIO2 is 240nS per cycle */
Alan Cox432729f2007-03-08 23:22:59 +00001825 return 3 << ATA_SHIFT_PIO;
1826 return 7 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001827 }
1828 }
Alan Cox432729f2007-03-08 23:22:59 +00001829 return 3 << ATA_SHIFT_PIO;
Alan Cox1bc4ccf2006-01-09 17:18:14 +00001830}
1831
1832/**
Tejun Heo49016ac2006-02-21 02:12:11 +09001833 * ata_dev_read_id - Read ID data from the specified device
Tejun Heo49016ac2006-02-21 02:12:11 +09001834 * @dev: target device
1835 * @p_class: pointer to class of the target device (may be changed)
Tejun Heobff04642006-11-10 18:08:10 +09001836 * @flags: ATA_READID_* flags
Tejun Heofe635c72006-05-15 20:57:35 +09001837 * @id: buffer to read IDENTIFY data into
Tejun Heo49016ac2006-02-21 02:12:11 +09001838 *
1839 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1840 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
Tejun Heoaec5c3c2006-03-25 01:33:34 +09001841 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1842 * for pre-ATA4 drives.
Tejun Heo49016ac2006-02-21 02:12:11 +09001843 *
Alan Cox50a99012007-08-08 14:27:00 +01001844 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
Jeff Garzik2dcb4072007-10-19 06:42:56 -04001845 * now we abort if we hit that case.
Alan Cox50a99012007-08-08 14:27:00 +01001846 *
Tejun Heo49016ac2006-02-21 02:12:11 +09001847 * LOCKING:
1848 * Kernel thread context (may sleep)
1849 *
1850 * RETURNS:
1851 * 0 on success, -errno otherwise.
1852 */
Tejun Heoa9beec92006-05-31 18:27:44 +09001853int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
Tejun Heobff04642006-11-10 18:08:10 +09001854 unsigned int flags, u16 *id)
Tejun Heo49016ac2006-02-21 02:12:11 +09001855{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001856 struct ata_port *ap = dev->link->ap;
Tejun Heo49016ac2006-02-21 02:12:11 +09001857 unsigned int class = *p_class;
Tejun Heo49016ac2006-02-21 02:12:11 +09001858 struct ata_taskfile tf;
1859 unsigned int err_mask = 0;
1860 const char *reason;
Tejun Heo54936f82007-05-11 14:35:29 +02001861 int may_fallback = 1, tried_spinup = 0;
Tejun Heo49016ac2006-02-21 02:12:11 +09001862 int rc;
1863
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001864 if (ata_msg_ctl(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09001865 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
Tejun Heo49016ac2006-02-21 02:12:11 +09001866
Tejun Heo49016ac2006-02-21 02:12:11 +09001867 ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
Tejun Heo49016ac2006-02-21 02:12:11 +09001868 retry:
Tejun Heo3373efd2006-05-15 20:57:53 +09001869 ata_tf_init(dev, &tf);
Tejun Heo49016ac2006-02-21 02:12:11 +09001870
1871 switch (class) {
1872 case ATA_DEV_ATA:
1873 tf.command = ATA_CMD_ID_ATA;
1874 break;
1875 case ATA_DEV_ATAPI:
1876 tf.command = ATA_CMD_ID_ATAPI;
1877 break;
1878 default:
1879 rc = -ENODEV;
1880 reason = "unsupported class";
1881 goto err_out;
1882 }
1883
1884 tf.protocol = ATA_PROT_PIO;
Tejun Heo81afe892007-02-07 12:37:41 -08001885
1886 /* Some devices choke if TF registers contain garbage. Make
1887 * sure those are properly initialized.
1888 */
1889 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1890
1891 /* Device presence detection is unreliable on some
1892 * controllers. Always poll IDENTIFY if available.
1893 */
1894 tf.flags |= ATA_TFLAG_POLLING;
Tejun Heo49016ac2006-02-21 02:12:11 +09001895
Tejun Heo3373efd2006-05-15 20:57:53 +09001896 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
Tejun Heo2b789102007-10-09 15:05:44 +09001897 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
Tejun Heo49016ac2006-02-21 02:12:11 +09001898 if (err_mask) {
Tejun Heo800b3992006-12-03 21:34:13 +09001899 if (err_mask & AC_ERR_NODEV_HINT) {
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001900 DPRINTK("ata%u.%d: NODEV after polling detection\n",
Tejun Heo44877b42007-02-21 01:06:51 +09001901 ap->print_id, dev->devno);
Tejun Heo55a8e2c2006-11-10 18:08:10 +09001902 return -ENOENT;
1903 }
1904
Tejun Heo54936f82007-05-11 14:35:29 +02001905 /* Device or controller might have reported the wrong
1906 * device class. Give a shot at the other IDENTIFY if
1907 * the current one is aborted by the device.
1908 */
1909 if (may_fallback &&
1910 (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
1911 may_fallback = 0;
1912
1913 if (class == ATA_DEV_ATA)
1914 class = ATA_DEV_ATAPI;
1915 else
1916 class = ATA_DEV_ATA;
1917 goto retry;
1918 }
1919
Tejun Heo49016ac2006-02-21 02:12:11 +09001920 rc = -EIO;
1921 reason = "I/O error";
Tejun Heo49016ac2006-02-21 02:12:11 +09001922 goto err_out;
1923 }
1924
Tejun Heo54936f82007-05-11 14:35:29 +02001925 /* Falling back doesn't make sense if ID data was read
1926 * successfully at least once.
1927 */
1928 may_fallback = 0;
1929
Tejun Heo49016ac2006-02-21 02:12:11 +09001930 swap_buf_le16(id, ATA_ID_WORDS);
1931
Tejun Heo49016ac2006-02-21 02:12:11 +09001932 /* sanity check */
Tejun Heoa4f57492006-09-12 20:35:49 -07001933 rc = -EINVAL;
Alan Cox60700682007-06-07 16:13:55 +01001934 reason = "device reports invalid type";
Tejun Heoa4f57492006-09-12 20:35:49 -07001935
1936 if (class == ATA_DEV_ATA) {
1937 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1938 goto err_out;
1939 } else {
1940 if (ata_id_is_ata(id))
1941 goto err_out;
Tejun Heo49016ac2006-02-21 02:12:11 +09001942 }
1943
Mark Lord169439c2007-04-17 18:26:07 -04001944 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1945 tried_spinup = 1;
1946 /*
1947 * Drive powered-up in standby mode, and requires a specific
1948 * SET_FEATURES spin-up subcommand before it will accept
1949 * anything other than the original IDENTIFY command.
1950 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04001951 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
Ryan Powerfb0582f92007-08-10 13:59:35 -07001952 if (err_mask && id[2] != 0x738c) {
Mark Lord169439c2007-04-17 18:26:07 -04001953 rc = -EIO;
1954 reason = "SPINUP failed";
1955 goto err_out;
1956 }
1957 /*
1958 * If the drive initially returned incomplete IDENTIFY info,
1959 * we now must reissue the IDENTIFY command.
1960 */
1961 if (id[2] == 0x37c8)
1962 goto retry;
1963 }
1964
Tejun Heobff04642006-11-10 18:08:10 +09001965 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
Tejun Heo49016ac2006-02-21 02:12:11 +09001966 /*
1967 * The exact sequence expected by certain pre-ATA4 drives is:
1968 * SRST RESET
Alan Cox50a99012007-08-08 14:27:00 +01001969 * IDENTIFY (optional in early ATA)
1970 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
Tejun Heo49016ac2006-02-21 02:12:11 +09001971 * anything else..
1972 * Some drives were very specific about that exact sequence.
Alan Cox50a99012007-08-08 14:27:00 +01001973 *
1974 * Note that ATA4 says lba is mandatory so the second check
1975 * shoud never trigger.
Tejun Heo49016ac2006-02-21 02:12:11 +09001976 */
1977 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
Tejun Heo3373efd2006-05-15 20:57:53 +09001978 err_mask = ata_dev_init_params(dev, id[3], id[6]);
Tejun Heo49016ac2006-02-21 02:12:11 +09001979 if (err_mask) {
1980 rc = -EIO;
1981 reason = "INIT_DEV_PARAMS failed";
1982 goto err_out;
1983 }
1984
1985 /* current CHS translation info (id[53-58]) might be
1986 * changed. reread the identify device info.
1987 */
Tejun Heobff04642006-11-10 18:08:10 +09001988 flags &= ~ATA_READID_POSTRESET;
Tejun Heo49016ac2006-02-21 02:12:11 +09001989 goto retry;
1990 }
1991 }
1992
1993 *p_class = class;
Tejun Heofe635c72006-05-15 20:57:35 +09001994
Tejun Heo49016ac2006-02-21 02:12:11 +09001995 return 0;
1996
1997 err_out:
Tejun Heo88574552006-06-25 20:00:35 +09001998 if (ata_msg_warn(ap))
Borislav Petkov0dd4b212006-06-23 02:29:08 -04001999 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
Tejun Heo88574552006-06-25 20:00:35 +09002000 "(%s, err_mask=0x%x)\n", reason, err_mask);
Tejun Heo49016ac2006-02-21 02:12:11 +09002001 return rc;
2002}
2003
Tejun Heo3373efd2006-05-15 20:57:53 +09002004static inline u8 ata_dev_knobble(struct ata_device *dev)
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002005{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002006 struct ata_port *ap = dev->link->ap;
2007 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002008}
2009
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002010static void ata_dev_config_ncq(struct ata_device *dev,
2011 char *desc, size_t desc_sz)
2012{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002013 struct ata_port *ap = dev->link->ap;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002014 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2015
2016 if (!ata_id_has_ncq(dev->id)) {
2017 desc[0] = '\0';
2018 return;
2019 }
Tejun Heo75683fe2007-07-05 13:31:27 +09002020 if (dev->horkage & ATA_HORKAGE_NONCQ) {
Alan Cox6919a0a2006-10-27 19:08:46 -07002021 snprintf(desc, desc_sz, "NCQ (not used)");
2022 return;
2023 }
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002024 if (ap->flags & ATA_FLAG_NCQ) {
Jeff Garzikcca39742006-08-24 03:19:22 -04002025 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002026 dev->flags |= ATA_DFLAG_NCQ;
2027 }
2028
2029 if (hdepth >= ddepth)
2030 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2031 else
2032 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2033}
2034
Tejun Heo49016ac2006-02-21 02:12:11 +09002035/**
Tejun Heoffeae412006-03-01 16:09:35 +09002036 * ata_dev_configure - Configure the specified ATA/ATAPI device
Tejun Heoffeae412006-03-01 16:09:35 +09002037 * @dev: Target device to configure
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 *
Tejun Heoffeae412006-03-01 16:09:35 +09002039 * Configure @dev according to @dev->id. Generic and low-level
2040 * driver specific fixups are also applied.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 *
2042 * LOCKING:
Tejun Heoffeae412006-03-01 16:09:35 +09002043 * Kernel thread context (may sleep)
2044 *
2045 * RETURNS:
2046 * 0 on success, -errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 */
Tejun Heoefdaedc2006-11-01 18:38:52 +09002048int ata_dev_configure(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002050 struct ata_port *ap = dev->link->ap;
2051 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo67465442007-05-15 03:28:16 +09002052 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002053 const u16 *id = dev->id;
Tejun Heo7dc951a2007-11-27 19:43:42 +09002054 unsigned long xfer_mask;
Alan Coxb352e572006-08-10 18:52:12 +01002055 char revbuf[7]; /* XYZ-99\0 */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002056 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2057 char modelbuf[ATA_ID_PROD_LEN+1];
Brian Kinge6d902a2006-06-28 08:30:31 -05002058 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002060 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
Tejun Heo44877b42007-02-21 01:06:51 +09002061 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2062 __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09002063 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 }
2065
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002066 if (ata_msg_probe(ap))
Tejun Heo44877b42007-02-21 01:06:51 +09002067 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068
Tejun Heo75683fe2007-07-05 13:31:27 +09002069 /* set horkage */
2070 dev->horkage |= ata_dev_blacklisted(dev);
2071
Tejun Heo67465442007-05-15 03:28:16 +09002072 /* let ACPI work its magic */
2073 rc = ata_acpi_on_devcfg(dev);
2074 if (rc)
2075 return rc;
Kristen Carlson Accardi08573a82006-11-10 16:14:47 -08002076
Tejun Heo05027ad2007-09-03 12:32:57 +09002077 /* massage HPA, do it early as it might change IDENTIFY data */
2078 rc = ata_hpa_resize(dev);
2079 if (rc)
2080 return rc;
2081
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002082 /* print device capabilities */
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002083 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002084 ata_dev_printk(dev, KERN_DEBUG,
2085 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2086 "85:%04x 86:%04x 87:%04x 88:%04x\n",
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002087 __FUNCTION__,
Tejun Heof15a1da2006-05-15 20:57:56 +09002088 id[49], id[82], id[83], id[84],
2089 id[85], id[86], id[87], id[88]);
Tejun Heoc39f5eb2006-03-13 19:51:19 +09002090
Tejun Heo208a9932006-03-05 17:55:58 +09002091 /* initialize to-be-configured parameters */
Tejun Heoea1dd4e2006-04-02 18:51:53 +09002092 dev->flags &= ~ATA_DFLAG_CFG_MASK;
Tejun Heo208a9932006-03-05 17:55:58 +09002093 dev->max_sectors = 0;
2094 dev->cdb_len = 0;
2095 dev->n_sectors = 0;
2096 dev->cylinders = 0;
2097 dev->heads = 0;
2098 dev->sectors = 0;
2099
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 /*
2101 * common ATA, ATAPI feature tests
2102 */
2103
Tejun Heoff8854b2006-03-06 04:31:56 +09002104 /* find max transfer mode; for printk only */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002105 xfer_mask = ata_id_xfermask(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002107 if (ata_msg_probe(ap))
2108 ata_dump_id(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109
Albert Leeef143d52007-06-05 13:01:33 +08002110 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2111 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2112 sizeof(fwrevbuf));
2113
2114 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2115 sizeof(modelbuf));
2116
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 /* ATA-specific feature tests */
2118 if (dev->class == ATA_DEV_ATA) {
Alan Coxb352e572006-08-10 18:52:12 +01002119 if (ata_id_is_cfa(id)) {
2120 if (id[162] & 1) /* CPRM may make this media unusable */
Tejun Heo44877b42007-02-21 01:06:51 +09002121 ata_dev_printk(dev, KERN_WARNING,
2122 "supports DRM functions and may "
2123 "not be fully accessable.\n");
Alan Coxb352e572006-08-10 18:52:12 +01002124 snprintf(revbuf, 7, "CFA");
Alan Coxae8d4ee2007-11-04 22:05:49 -05002125 } else {
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002126 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
Alan Coxae8d4ee2007-11-04 22:05:49 -05002127 /* Warn the user if the device has TPM extensions */
2128 if (ata_id_has_tpm(id))
2129 ata_dev_printk(dev, KERN_WARNING,
2130 "supports DRM functions and may "
2131 "not be fully accessable.\n");
2132 }
Alan Coxb352e572006-08-10 18:52:12 +01002133
Tejun Heo1148c3a2006-03-13 19:48:04 +09002134 dev->n_sectors = ata_id_n_sectors(id);
Tejun Heo29407402006-02-12 22:47:04 +09002135
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002136 if (dev->id[59] & 0x100)
2137 dev->multi_count = dev->id[59] & 0xff;
2138
Tejun Heo1148c3a2006-03-13 19:48:04 +09002139 if (ata_id_has_lba(id)) {
Tejun Heo4c2d7212006-03-05 17:55:58 +09002140 const char *lba_desc;
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002141 char ncq_desc[20];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002142
Tejun Heo4c2d7212006-03-05 17:55:58 +09002143 lba_desc = "LBA";
2144 dev->flags |= ATA_DFLAG_LBA;
Tejun Heo1148c3a2006-03-13 19:48:04 +09002145 if (ata_id_has_lba48(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002146 dev->flags |= ATA_DFLAG_LBA48;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002147 lba_desc = "LBA48";
Tejun Heo6fc49ad2006-11-11 20:10:45 +09002148
2149 if (dev->n_sectors >= (1UL << 28) &&
2150 ata_id_has_flush_ext(id))
2151 dev->flags |= ATA_DFLAG_FLUSH_EXT;
Tejun Heo4c2d7212006-03-05 17:55:58 +09002152 }
Albert Lee8bf62ece2005-05-12 15:29:42 -04002153
Tejun Heoa6e6ce82006-05-15 21:03:48 +09002154 /* config NCQ */
2155 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2156
Albert Lee8bf62ece2005-05-12 15:29:42 -04002157 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002158 if (ata_msg_drv(ap) && print_info) {
2159 ata_dev_printk(dev, KERN_INFO,
2160 "%s: %s, %s, max %s\n",
2161 revbuf, modelbuf, fwrevbuf,
2162 ata_mode_string(xfer_mask));
2163 ata_dev_printk(dev, KERN_INFO,
2164 "%Lu sectors, multi %u: %s %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002165 (unsigned long long)dev->n_sectors,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002166 dev->multi_count, lba_desc, ncq_desc);
2167 }
Tejun Heoffeae412006-03-01 16:09:35 +09002168 } else {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002169 /* CHS */
2170
2171 /* Default translation */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002172 dev->cylinders = id[1];
2173 dev->heads = id[3];
2174 dev->sectors = id[6];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002175
Tejun Heo1148c3a2006-03-13 19:48:04 +09002176 if (ata_id_current_chs_valid(id)) {
Albert Lee8bf62ece2005-05-12 15:29:42 -04002177 /* Current CHS translation is valid. */
Tejun Heo1148c3a2006-03-13 19:48:04 +09002178 dev->cylinders = id[54];
2179 dev->heads = id[55];
2180 dev->sectors = id[56];
Albert Lee8bf62ece2005-05-12 15:29:42 -04002181 }
2182
2183 /* print device info to dmesg */
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002184 if (ata_msg_drv(ap) && print_info) {
Tejun Heo88574552006-06-25 20:00:35 +09002185 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002186 "%s: %s, %s, max %s\n",
2187 revbuf, modelbuf, fwrevbuf,
2188 ata_mode_string(xfer_mask));
Jeff Garzika84471f2007-02-26 05:51:33 -05002189 ata_dev_printk(dev, KERN_INFO,
Eric D. Mudama3f64f562007-01-30 23:00:40 -07002190 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2191 (unsigned long long)dev->n_sectors,
2192 dev->multi_count, dev->cylinders,
2193 dev->heads, dev->sectors);
2194 }
Albert Lee07f6f7d2005-11-01 19:33:20 +08002195 }
2196
Tejun Heo6e7846e2006-02-12 23:32:58 +09002197 dev->cdb_len = 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 }
2199
2200 /* ATAPI-specific feature tests */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05002201 else if (dev->class == ATA_DEV_ATAPI) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002202 const char *cdb_intr_string = "";
2203 const char *atapi_an_string = "";
Tejun Heo7d77b242007-09-23 13:14:13 +09002204 u32 sntf;
Albert Lee08a556d2006-03-31 13:29:04 +08002205
Tejun Heo1148c3a2006-03-13 19:48:04 +09002206 rc = atapi_cdb_len(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002208 if (ata_msg_warn(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002209 ata_dev_printk(dev, KERN_WARNING,
2210 "unsupported CDB len\n");
Tejun Heoffeae412006-03-01 16:09:35 +09002211 rc = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 goto err_out_nosup;
2213 }
Tejun Heo6e7846e2006-02-12 23:32:58 +09002214 dev->cdb_len = (unsigned int) rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215
Tejun Heo7d77b242007-09-23 13:14:13 +09002216 /* Enable ATAPI AN if both the host and device have
2217 * the support. If PMP is attached, SNTF is required
2218 * to enable ATAPI AN to discern between PHY status
2219 * changed notifications and ATAPI ANs.
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002220 */
Tejun Heo7d77b242007-09-23 13:14:13 +09002221 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2222 (!ap->nr_pmp_links ||
2223 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
Tejun Heo854c73a2007-09-23 13:14:11 +09002224 unsigned int err_mask;
2225
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002226 /* issue SET feature command to turn this on */
Jeff Garzik218f3d32007-10-25 00:33:27 -04002227 err_mask = ata_dev_set_feature(dev,
2228 SETFEATURES_SATA_ENABLE, SATA_AN);
Tejun Heo854c73a2007-09-23 13:14:11 +09002229 if (err_mask)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002230 ata_dev_printk(dev, KERN_ERR,
Tejun Heo854c73a2007-09-23 13:14:11 +09002231 "failed to enable ATAPI AN "
2232 "(err_mask=0x%x)\n", err_mask);
2233 else {
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002234 dev->flags |= ATA_DFLAG_AN;
Tejun Heo854c73a2007-09-23 13:14:11 +09002235 atapi_an_string = ", ATAPI AN";
2236 }
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04002237 }
2238
Albert Lee08a556d2006-03-31 13:29:04 +08002239 if (ata_id_cdb_intr(dev->id)) {
Albert Lee312f7da2005-09-27 17:38:03 +08002240 dev->flags |= ATA_DFLAG_CDB_INTR;
Albert Lee08a556d2006-03-31 13:29:04 +08002241 cdb_intr_string = ", CDB intr";
2242 }
Albert Lee312f7da2005-09-27 17:38:03 +08002243
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 /* print device info to dmesg */
Borislav Petkov5afc8142006-06-27 14:51:25 +02002245 if (ata_msg_drv(ap) && print_info)
Albert Leeef143d52007-06-05 13:01:33 +08002246 ata_dev_printk(dev, KERN_INFO,
Tejun Heo854c73a2007-09-23 13:14:11 +09002247 "ATAPI: %s, %s, max %s%s%s\n",
Albert Leeef143d52007-06-05 13:01:33 +08002248 modelbuf, fwrevbuf,
Tejun Heo12436c32006-05-15 20:59:15 +09002249 ata_mode_string(xfer_mask),
Tejun Heo854c73a2007-09-23 13:14:11 +09002250 cdb_intr_string, atapi_an_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 }
2252
Tejun Heo914ed352006-11-01 18:39:55 +09002253 /* determine max_sectors */
2254 dev->max_sectors = ATA_MAX_SECTORS;
2255 if (dev->flags & ATA_DFLAG_LBA48)
2256 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2257
Kristen Carlson Accardica773292007-10-25 00:58:59 -04002258 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2259 if (ata_id_has_hipm(dev->id))
2260 dev->flags |= ATA_DFLAG_HIPM;
2261 if (ata_id_has_dipm(dev->id))
2262 dev->flags |= ATA_DFLAG_DIPM;
2263 }
2264
Alan Cox93590852006-09-12 16:55:12 +01002265 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2266 /* Let the user know. We don't want to disallow opens for
2267 rescue purposes, or in case the vendor is just a blithering
2268 idiot */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002269 if (print_info) {
Alan Cox93590852006-09-12 16:55:12 +01002270 ata_dev_printk(dev, KERN_WARNING,
2271"Drive reports diagnostics failure. This may indicate a drive\n");
2272 ata_dev_printk(dev, KERN_WARNING,
2273"fault or invalid emulation. Contact drive vendor for information.\n");
2274 }
2275 }
2276
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002277 /* limit bridge transfers to udma5, 200 sectors */
Tejun Heo3373efd2006-05-15 20:57:53 +09002278 if (ata_dev_knobble(dev)) {
Borislav Petkov5afc8142006-06-27 14:51:25 +02002279 if (ata_msg_drv(ap) && print_info)
Tejun Heof15a1da2006-05-15 20:57:56 +09002280 ata_dev_printk(dev, KERN_INFO,
2281 "applying bridge limits\n");
Tejun Heo5a529132006-03-24 14:07:50 +09002282 dev->udma_mask &= ATA_UDMA5;
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002283 dev->max_sectors = ATA_MAX_SECTORS;
2284 }
2285
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002286 if ((dev->class == ATA_DEV_ATAPI) &&
Albert Leef442cd82007-11-15 10:35:47 +09002287 (atapi_command_packet_set(id) == TYPE_TAPE)) {
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002288 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
Albert Leef442cd82007-11-15 10:35:47 +09002289 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2290 }
Tony Battersbyf8d8e572007-10-30 11:44:35 -04002291
Tejun Heo75683fe2007-07-05 13:31:27 +09002292 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
Tejun Heo03ec52d2007-04-12 13:38:11 +09002293 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2294 dev->max_sectors);
Albert Lee18d6e9d2007-04-02 11:34:15 +08002295
Kristen Carlson Accardica773292007-10-25 00:58:59 -04002296 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2297 dev->horkage |= ATA_HORKAGE_IPM;
2298
2299 /* reset link pm_policy for this port to no pm */
2300 ap->pm_policy = MAX_PERFORMANCE;
2301 }
2302
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002303 if (ap->ops->dev_config)
Alancd0d3bb2007-03-02 00:56:15 +00002304 ap->ops->dev_config(dev);
Tejun Heo4b2f3ed2006-03-01 16:09:36 +09002305
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002306 if (ata_msg_probe(ap))
2307 ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
2308 __FUNCTION__, ata_chk_status(ap));
Tejun Heoffeae412006-03-01 16:09:35 +09002309 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310
2311err_out_nosup:
Borislav Petkov0dd4b212006-06-23 02:29:08 -04002312 if (ata_msg_probe(ap))
Tejun Heo88574552006-06-25 20:00:35 +09002313 ata_dev_printk(dev, KERN_DEBUG,
2314 "%s: EXIT, err\n", __FUNCTION__);
Tejun Heoffeae412006-03-01 16:09:35 +09002315 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316}
2317
2318/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002319 * ata_cable_40wire - return 40 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002320 * @ap: port
2321 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002322 * Helper method for drivers which want to hardwire 40 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002323 * detection.
2324 */
2325
2326int ata_cable_40wire(struct ata_port *ap)
2327{
2328 return ATA_CBL_PATA40;
2329}
2330
2331/**
Alan Cox2e41e8e2007-03-08 23:19:19 +00002332 * ata_cable_80wire - return 80 wire cable type
Alan Coxbe0d18d2007-03-06 02:37:56 -08002333 * @ap: port
2334 *
Alan Cox2e41e8e2007-03-08 23:19:19 +00002335 * Helper method for drivers which want to hardwire 80 wire cable
Alan Coxbe0d18d2007-03-06 02:37:56 -08002336 * detection.
2337 */
2338
2339int ata_cable_80wire(struct ata_port *ap)
2340{
2341 return ATA_CBL_PATA80;
2342}
2343
2344/**
2345 * ata_cable_unknown - return unknown PATA cable.
2346 * @ap: port
2347 *
2348 * Helper method for drivers which have no PATA cable detection.
2349 */
2350
2351int ata_cable_unknown(struct ata_port *ap)
2352{
2353 return ATA_CBL_PATA_UNK;
2354}
2355
2356/**
2357 * ata_cable_sata - return SATA cable type
2358 * @ap: port
2359 *
2360 * Helper method for drivers which have SATA cables
2361 */
2362
2363int ata_cable_sata(struct ata_port *ap)
2364{
2365 return ATA_CBL_SATA;
2366}
2367
2368/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 * ata_bus_probe - Reset and probe ATA bus
2370 * @ap: Bus to probe
2371 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002372 * Master ATA bus probing function. Initiates a hardware-dependent
2373 * bus reset, then attempts to identify any devices found on
2374 * the bus.
2375 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04002377 * PCI/etc. bus probe sem.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378 *
2379 * RETURNS:
Tejun Heo96072e62006-04-01 01:38:17 +09002380 * Zero on success, negative errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381 */
2382
Brian King80289162006-08-07 14:27:31 -05002383int ata_bus_probe(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384{
Tejun Heo28ca5c52006-03-01 16:09:36 +09002385 unsigned int classes[ATA_MAX_DEVICES];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002386 int tries[ATA_MAX_DEVICES];
Tejun Heof58229f2007-08-06 18:36:23 +09002387 int rc;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002388 struct ata_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389
Tejun Heo28ca5c52006-03-01 16:09:36 +09002390 ata_port_probe(ap);
2391
Tejun Heof58229f2007-08-06 18:36:23 +09002392 ata_link_for_each_dev(dev, &ap->link)
2393 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002394
2395 retry:
Tejun Heocdeab112007-10-29 16:41:09 +09002396 ata_link_for_each_dev(dev, &ap->link) {
2397 /* If we issue an SRST then an ATA drive (not ATAPI)
2398 * may change configuration and be in PIO0 timing. If
2399 * we do a hard reset (or are coming from power on)
2400 * this is true for ATA or ATAPI. Until we've set a
2401 * suitable controller mode we should not touch the
2402 * bus as we may be talking too fast.
2403 */
2404 dev->pio_mode = XFER_PIO_0;
2405
2406 /* If the controller has a pio mode setup function
2407 * then use it to set the chipset to rights. Don't
2408 * touch the DMA setup as that will be dealt with when
2409 * configuring devices.
2410 */
2411 if (ap->ops->set_piomode)
2412 ap->ops->set_piomode(ap, dev);
2413 }
2414
Tejun Heo20444702006-03-13 01:57:01 +09002415 /* reset and determine device classes */
Tejun Heo52783c52006-05-31 18:28:22 +09002416 ap->ops->phy_reset(ap);
Tejun Heo2061a472006-03-12 00:57:39 +09002417
Tejun Heof58229f2007-08-06 18:36:23 +09002418 ata_link_for_each_dev(dev, &ap->link) {
Tejun Heo52783c52006-05-31 18:28:22 +09002419 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2420 dev->class != ATA_DEV_UNKNOWN)
2421 classes[dev->devno] = dev->class;
2422 else
2423 classes[dev->devno] = ATA_DEV_NONE;
Tejun Heo20444702006-03-13 01:57:01 +09002424
Tejun Heo52783c52006-05-31 18:28:22 +09002425 dev->class = ATA_DEV_UNKNOWN;
Tejun Heo28ca5c52006-03-01 16:09:36 +09002426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427
Tejun Heo52783c52006-05-31 18:28:22 +09002428 ata_port_probe(ap);
Tejun Heo20444702006-03-13 01:57:01 +09002429
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002430 /* read IDENTIFY page and configure devices. We have to do the identify
2431 specific sequence bass-ackwards so that PDIAG- is released by
2432 the slave device */
2433
Tejun Heof58229f2007-08-06 18:36:23 +09002434 ata_link_for_each_dev(dev, &ap->link) {
2435 if (tries[dev->devno])
2436 dev->class = classes[dev->devno];
Tejun Heo14d2bac2006-04-02 17:54:46 +09002437
Tejun Heoe1211e32006-04-01 01:38:18 +09002438 if (!ata_dev_enabled(dev))
Tejun Heoffeae412006-03-01 16:09:35 +09002439 continue;
2440
Tejun Heobff04642006-11-10 18:08:10 +09002441 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2442 dev->id);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002443 if (rc)
2444 goto fail;
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002445 }
2446
Alan Coxbe0d18d2007-03-06 02:37:56 -08002447 /* Now ask for the cable type as PDIAG- should have been released */
2448 if (ap->ops->cable_detect)
2449 ap->cbl = ap->ops->cable_detect(ap);
2450
Alan Cox614fe292007-08-22 23:22:45 +01002451 /* We may have SATA bridge glue hiding here irrespective of the
2452 reported cable types and sensed types */
2453 ata_link_for_each_dev(dev, &ap->link) {
2454 if (!ata_dev_enabled(dev))
2455 continue;
2456 /* SATA drives indicate we have a bridge. We don't know which
2457 end of the link the bridge is which is a problem */
2458 if (ata_id_is_sata(dev->id))
2459 ap->cbl = ATA_CBL_SATA;
2460 }
2461
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002462 /* After the identify sequence we can now set up the devices. We do
2463 this in the normal order so that the user doesn't get confused */
2464
Tejun Heof58229f2007-08-06 18:36:23 +09002465 ata_link_for_each_dev(dev, &ap->link) {
Jeff Garzikf31f0cc2007-03-02 17:47:28 -05002466 if (!ata_dev_enabled(dev))
2467 continue;
Tejun Heoffeae412006-03-01 16:09:35 +09002468
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002469 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
Tejun Heoefdaedc2006-11-01 18:38:52 +09002470 rc = ata_dev_configure(dev);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002471 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002472 if (rc)
2473 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474 }
2475
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002476 /* configure transfer mode */
Tejun Heo02607312007-08-06 18:36:23 +09002477 rc = ata_set_mode(&ap->link, &dev);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002478 if (rc)
Tejun Heo51713d32006-04-11 22:26:29 +09002479 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002480
Tejun Heof58229f2007-08-06 18:36:23 +09002481 ata_link_for_each_dev(dev, &ap->link)
2482 if (ata_dev_enabled(dev))
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002483 return 0;
Alan Coxe35a9e02006-03-27 18:46:37 +01002484
Tejun Heoe82cbdb2006-04-01 01:38:18 +09002485 /* no device present, disable port */
2486 ata_port_disable(ap);
Tejun Heo96072e62006-04-01 01:38:17 +09002487 return -ENODEV;
Tejun Heo14d2bac2006-04-02 17:54:46 +09002488
2489 fail:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002490 tries[dev->devno]--;
2491
Tejun Heo14d2bac2006-04-02 17:54:46 +09002492 switch (rc) {
2493 case -EINVAL:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002494 /* eeek, something went very wrong, give up */
Tejun Heo14d2bac2006-04-02 17:54:46 +09002495 tries[dev->devno] = 0;
2496 break;
Tejun Heo4ae72a12007-02-02 16:22:30 +09002497
2498 case -ENODEV:
2499 /* give it just one more chance */
2500 tries[dev->devno] = min(tries[dev->devno], 1);
Tejun Heo14d2bac2006-04-02 17:54:46 +09002501 case -EIO:
Tejun Heo4ae72a12007-02-02 16:22:30 +09002502 if (tries[dev->devno] == 1) {
2503 /* This is the last chance, better to slow
2504 * down than lose it.
2505 */
Tejun Heo936fd732007-08-06 18:36:23 +09002506 sata_down_spd_limit(&ap->link);
Tejun Heo4ae72a12007-02-02 16:22:30 +09002507 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2508 }
Tejun Heo14d2bac2006-04-02 17:54:46 +09002509 }
2510
Tejun Heo4ae72a12007-02-02 16:22:30 +09002511 if (!tries[dev->devno])
Tejun Heo3373efd2006-05-15 20:57:53 +09002512 ata_dev_disable(dev);
Tejun Heoec573752006-04-11 22:26:29 +09002513
Tejun Heo14d2bac2006-04-02 17:54:46 +09002514 goto retry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515}
2516
2517/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04002518 * ata_port_probe - Mark port as enabled
2519 * @ap: Port for which we indicate enablement
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04002521 * Modify @ap data structure such that the system
2522 * thinks that the entire port is enabled.
2523 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002524 * LOCKING: host lock, or some other form of
Jeff Garzik0cba6322005-05-30 19:49:12 -04002525 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 */
2527
2528void ata_port_probe(struct ata_port *ap)
2529{
Tejun Heo198e0fe2006-04-02 18:51:52 +09002530 ap->flags &= ~ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531}
2532
2533/**
Tejun Heo3be680b2005-12-19 22:35:02 +09002534 * sata_print_link_status - Print SATA link status
Tejun Heo936fd732007-08-06 18:36:23 +09002535 * @link: SATA link to printk link status about
Tejun Heo3be680b2005-12-19 22:35:02 +09002536 *
2537 * This function prints link speed and status of a SATA link.
2538 *
2539 * LOCKING:
2540 * None.
2541 */
Tejun Heo936fd732007-08-06 18:36:23 +09002542void sata_print_link_status(struct ata_link *link)
Tejun Heo3be680b2005-12-19 22:35:02 +09002543{
Tejun Heo6d5f9732006-04-03 00:09:41 +09002544 u32 sstatus, scontrol, tmp;
Tejun Heo3be680b2005-12-19 22:35:02 +09002545
Tejun Heo936fd732007-08-06 18:36:23 +09002546 if (sata_scr_read(link, SCR_STATUS, &sstatus))
Tejun Heo3be680b2005-12-19 22:35:02 +09002547 return;
Tejun Heo936fd732007-08-06 18:36:23 +09002548 sata_scr_read(link, SCR_CONTROL, &scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002549
Tejun Heo936fd732007-08-06 18:36:23 +09002550 if (ata_link_online(link)) {
Tejun Heo3be680b2005-12-19 22:35:02 +09002551 tmp = (sstatus >> 4) & 0xf;
Tejun Heo936fd732007-08-06 18:36:23 +09002552 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002553 "SATA link up %s (SStatus %X SControl %X)\n",
2554 sata_spd_string(tmp), sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002555 } else {
Tejun Heo936fd732007-08-06 18:36:23 +09002556 ata_link_printk(link, KERN_INFO,
Tejun Heof15a1da2006-05-15 20:57:56 +09002557 "SATA link down (SStatus %X SControl %X)\n",
2558 sstatus, scontrol);
Tejun Heo3be680b2005-12-19 22:35:02 +09002559 }
2560}
2561
2562/**
Alan Coxebdfca62006-03-23 15:38:34 +00002563 * ata_dev_pair - return other device on cable
Alan Coxebdfca62006-03-23 15:38:34 +00002564 * @adev: device
2565 *
2566 * Obtain the other device on the same cable, or if none is
2567 * present NULL is returned
2568 */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002569
Tejun Heo3373efd2006-05-15 20:57:53 +09002570struct ata_device *ata_dev_pair(struct ata_device *adev)
Alan Coxebdfca62006-03-23 15:38:34 +00002571{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002572 struct ata_link *link = adev->link;
2573 struct ata_device *pair = &link->device[1 - adev->devno];
Tejun Heoe1211e32006-04-01 01:38:18 +09002574 if (!ata_dev_enabled(pair))
Alan Coxebdfca62006-03-23 15:38:34 +00002575 return NULL;
2576 return pair;
2577}
2578
2579/**
Jeff Garzik780a87f2005-05-30 15:41:05 -04002580 * ata_port_disable - Disable port.
2581 * @ap: Port to be disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04002583 * Modify @ap data structure such that the system
2584 * thinks that the entire port is disabled, and should
2585 * never attempt to probe or communicate with devices
2586 * on this port.
2587 *
Jeff Garzikcca39742006-08-24 03:19:22 -04002588 * LOCKING: host lock, or some other form of
Jeff Garzik780a87f2005-05-30 15:41:05 -04002589 * serialization.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002590 */
2591
2592void ata_port_disable(struct ata_port *ap)
2593{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002594 ap->link.device[0].class = ATA_DEV_NONE;
2595 ap->link.device[1].class = ATA_DEV_NONE;
Tejun Heo198e0fe2006-04-02 18:51:52 +09002596 ap->flags |= ATA_FLAG_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597}
2598
Tejun Heo1c3fae42006-04-02 20:53:28 +09002599/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002600 * sata_down_spd_limit - adjust SATA spd limit downward
Tejun Heo936fd732007-08-06 18:36:23 +09002601 * @link: Link to adjust SATA spd limit for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002602 *
Tejun Heo936fd732007-08-06 18:36:23 +09002603 * Adjust SATA spd limit of @link downward. Note that this
Tejun Heo1c3fae42006-04-02 20:53:28 +09002604 * function only adjusts the limit. The change must be applied
Tejun Heo3c567b72006-05-15 20:57:23 +09002605 * using sata_set_spd().
Tejun Heo1c3fae42006-04-02 20:53:28 +09002606 *
2607 * LOCKING:
2608 * Inherited from caller.
2609 *
2610 * RETURNS:
2611 * 0 on success, negative errno on failure
2612 */
Tejun Heo936fd732007-08-06 18:36:23 +09002613int sata_down_spd_limit(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002614{
Tejun Heo81952c52006-05-15 20:57:47 +09002615 u32 sstatus, spd, mask;
2616 int rc, highbit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002617
Tejun Heo936fd732007-08-06 18:36:23 +09002618 if (!sata_scr_valid(link))
Tejun Heo008a7892007-07-16 14:29:40 +09002619 return -EOPNOTSUPP;
2620
2621 /* If SCR can be read, use it to determine the current SPD.
Tejun Heo936fd732007-08-06 18:36:23 +09002622 * If not, use cached value in link->sata_spd.
Tejun Heo008a7892007-07-16 14:29:40 +09002623 */
Tejun Heo936fd732007-08-06 18:36:23 +09002624 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
Tejun Heo008a7892007-07-16 14:29:40 +09002625 if (rc == 0)
2626 spd = (sstatus >> 4) & 0xf;
2627 else
Tejun Heo936fd732007-08-06 18:36:23 +09002628 spd = link->sata_spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002629
Tejun Heo936fd732007-08-06 18:36:23 +09002630 mask = link->sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002631 if (mask <= 1)
2632 return -EINVAL;
Tejun Heo008a7892007-07-16 14:29:40 +09002633
2634 /* unconditionally mask off the highest bit */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002635 highbit = fls(mask) - 1;
2636 mask &= ~(1 << highbit);
2637
Tejun Heo008a7892007-07-16 14:29:40 +09002638 /* Mask off all speeds higher than or equal to the current
2639 * one. Force 1.5Gbps if current SPD is not available.
2640 */
2641 if (spd > 1)
2642 mask &= (1 << (spd - 1)) - 1;
2643 else
2644 mask &= 1;
2645
2646 /* were we already at the bottom? */
Tejun Heo1c3fae42006-04-02 20:53:28 +09002647 if (!mask)
2648 return -EINVAL;
2649
Tejun Heo936fd732007-08-06 18:36:23 +09002650 link->sata_spd_limit = mask;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002651
Tejun Heo936fd732007-08-06 18:36:23 +09002652 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
Tejun Heof15a1da2006-05-15 20:57:56 +09002653 sata_spd_string(fls(mask)));
Tejun Heo1c3fae42006-04-02 20:53:28 +09002654
2655 return 0;
2656}
2657
Tejun Heo936fd732007-08-06 18:36:23 +09002658static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002659{
Tejun Heo52702222007-10-31 10:17:07 +09002660 struct ata_link *host_link = &link->ap->link;
2661 u32 limit, target, spd;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002662
Tejun Heo52702222007-10-31 10:17:07 +09002663 limit = link->sata_spd_limit;
2664
2665 /* Don't configure downstream link faster than upstream link.
2666 * It doesn't speed up anything and some PMPs choke on such
2667 * configuration.
2668 */
2669 if (!ata_is_host_link(link) && host_link->sata_spd)
2670 limit &= (1 << host_link->sata_spd) - 1;
2671
2672 if (limit == UINT_MAX)
2673 target = 0;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002674 else
Tejun Heo52702222007-10-31 10:17:07 +09002675 target = fls(limit);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002676
2677 spd = (*scontrol >> 4) & 0xf;
Tejun Heo52702222007-10-31 10:17:07 +09002678 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002679
Tejun Heo52702222007-10-31 10:17:07 +09002680 return spd != target;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002681}
2682
2683/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002684 * sata_set_spd_needed - is SATA spd configuration needed
Tejun Heo936fd732007-08-06 18:36:23 +09002685 * @link: Link in question
Tejun Heo1c3fae42006-04-02 20:53:28 +09002686 *
2687 * Test whether the spd limit in SControl matches
Tejun Heo936fd732007-08-06 18:36:23 +09002688 * @link->sata_spd_limit. This function is used to determine
Tejun Heo1c3fae42006-04-02 20:53:28 +09002689 * whether hardreset is necessary to apply SATA spd
2690 * configuration.
2691 *
2692 * LOCKING:
2693 * Inherited from caller.
2694 *
2695 * RETURNS:
2696 * 1 if SATA spd configuration is needed, 0 otherwise.
2697 */
Tejun Heo936fd732007-08-06 18:36:23 +09002698int sata_set_spd_needed(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002699{
2700 u32 scontrol;
2701
Tejun Heo936fd732007-08-06 18:36:23 +09002702 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
Tejun Heodb64bcf2007-10-31 10:17:06 +09002703 return 1;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002704
Tejun Heo936fd732007-08-06 18:36:23 +09002705 return __sata_set_spd_needed(link, &scontrol);
Tejun Heo1c3fae42006-04-02 20:53:28 +09002706}
2707
2708/**
Tejun Heo3c567b72006-05-15 20:57:23 +09002709 * sata_set_spd - set SATA spd according to spd limit
Tejun Heo936fd732007-08-06 18:36:23 +09002710 * @link: Link to set SATA spd for
Tejun Heo1c3fae42006-04-02 20:53:28 +09002711 *
Tejun Heo936fd732007-08-06 18:36:23 +09002712 * Set SATA spd of @link according to sata_spd_limit.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002713 *
2714 * LOCKING:
2715 * Inherited from caller.
2716 *
2717 * RETURNS:
2718 * 0 if spd doesn't need to be changed, 1 if spd has been
Tejun Heo81952c52006-05-15 20:57:47 +09002719 * changed. Negative errno if SCR registers are inaccessible.
Tejun Heo1c3fae42006-04-02 20:53:28 +09002720 */
Tejun Heo936fd732007-08-06 18:36:23 +09002721int sata_set_spd(struct ata_link *link)
Tejun Heo1c3fae42006-04-02 20:53:28 +09002722{
2723 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09002724 int rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002725
Tejun Heo936fd732007-08-06 18:36:23 +09002726 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002727 return rc;
Tejun Heo1c3fae42006-04-02 20:53:28 +09002728
Tejun Heo936fd732007-08-06 18:36:23 +09002729 if (!__sata_set_spd_needed(link, &scontrol))
Tejun Heo1c3fae42006-04-02 20:53:28 +09002730 return 0;
2731
Tejun Heo936fd732007-08-06 18:36:23 +09002732 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09002733 return rc;
2734
Tejun Heo1c3fae42006-04-02 20:53:28 +09002735 return 1;
2736}
2737
Alan Cox452503f2005-10-21 19:01:32 -04002738/*
2739 * This mode timing computation functionality is ported over from
2740 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
2741 */
2742/*
Alan Coxb352e572006-08-10 18:52:12 +01002743 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
Alan Cox452503f2005-10-21 19:01:32 -04002744 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
Alan Coxb352e572006-08-10 18:52:12 +01002745 * for UDMA6, which is currently supported only by Maxtor drives.
2746 *
2747 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
Alan Cox452503f2005-10-21 19:01:32 -04002748 */
2749
2750static const struct ata_timing ata_timing[] = {
Tejun Heo70cd0712007-11-27 19:43:40 +09002751/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
2752 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
2753 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 },
2754 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 },
2755 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
2756 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
2757 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
2758 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002759
Tejun Heo70cd0712007-11-27 19:43:40 +09002760 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
2761 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
2762 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002763
Tejun Heo70cd0712007-11-27 19:43:40 +09002764 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
2765 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
2766 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
Alan Coxb352e572006-08-10 18:52:12 +01002767 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
Tejun Heo70cd0712007-11-27 19:43:40 +09002768 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
Alan Cox452503f2005-10-21 19:01:32 -04002769
2770/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
Tejun Heo70cd0712007-11-27 19:43:40 +09002771 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
2772 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
2773 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 },
2774 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
2775 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 },
2776 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 },
2777 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 },
Alan Cox452503f2005-10-21 19:01:32 -04002778
2779 { 0xFF }
2780};
2781
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002782#define ENOUGH(v, unit) (((v)-1)/(unit)+1)
2783#define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
Alan Cox452503f2005-10-21 19:01:32 -04002784
2785static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
2786{
2787 q->setup = EZ(t->setup * 1000, T);
2788 q->act8b = EZ(t->act8b * 1000, T);
2789 q->rec8b = EZ(t->rec8b * 1000, T);
2790 q->cyc8b = EZ(t->cyc8b * 1000, T);
2791 q->active = EZ(t->active * 1000, T);
2792 q->recover = EZ(t->recover * 1000, T);
2793 q->cycle = EZ(t->cycle * 1000, T);
2794 q->udma = EZ(t->udma * 1000, UT);
2795}
2796
2797void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
2798 struct ata_timing *m, unsigned int what)
2799{
2800 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
2801 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
2802 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
2803 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
2804 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
2805 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
2806 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
2807 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
2808}
2809
Tejun Heo63573572007-11-27 19:43:39 +09002810const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
Alan Cox452503f2005-10-21 19:01:32 -04002811{
Tejun Heo70cd0712007-11-27 19:43:40 +09002812 const struct ata_timing *t = ata_timing;
Alan Cox452503f2005-10-21 19:01:32 -04002813
Tejun Heo70cd0712007-11-27 19:43:40 +09002814 while (xfer_mode > t->mode)
2815 t++;
2816
2817 if (xfer_mode == t->mode)
2818 return t;
2819 return NULL;
Alan Cox452503f2005-10-21 19:01:32 -04002820}
2821
2822int ata_timing_compute(struct ata_device *adev, unsigned short speed,
2823 struct ata_timing *t, int T, int UT)
2824{
2825 const struct ata_timing *s;
2826 struct ata_timing p;
2827
2828 /*
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05002829 * Find the mode.
Albert Lee75b1f2f2005-11-16 17:06:18 +08002830 */
Alan Cox452503f2005-10-21 19:01:32 -04002831
2832 if (!(s = ata_timing_find_mode(speed)))
2833 return -EINVAL;
2834
Albert Lee75b1f2f2005-11-16 17:06:18 +08002835 memcpy(t, s, sizeof(*s));
2836
Alan Cox452503f2005-10-21 19:01:32 -04002837 /*
2838 * If the drive is an EIDE drive, it can tell us it needs extended
2839 * PIO/MW_DMA cycle timing.
2840 */
2841
2842 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
2843 memset(&p, 0, sizeof(p));
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002844 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
Alan Cox452503f2005-10-21 19:01:32 -04002845 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
2846 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002847 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
Alan Cox452503f2005-10-21 19:01:32 -04002848 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
2849 }
2850 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
2851 }
2852
2853 /*
2854 * Convert the timing to bus clock counts.
2855 */
2856
Albert Lee75b1f2f2005-11-16 17:06:18 +08002857 ata_timing_quantize(t, t, T, UT);
Alan Cox452503f2005-10-21 19:01:32 -04002858
2859 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002860 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
2861 * S.M.A.R.T * and some other commands. We have to ensure that the
2862 * DMA cycle timing is slower/equal than the fastest PIO timing.
Alan Cox452503f2005-10-21 19:01:32 -04002863 */
2864
Alanfd3367af2006-12-07 12:41:18 +00002865 if (speed > XFER_PIO_6) {
Alan Cox452503f2005-10-21 19:01:32 -04002866 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
2867 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
2868 }
2869
2870 /*
Randy Dunlapc893a3a2006-01-28 13:15:32 -05002871 * Lengthen active & recovery time so that cycle time is correct.
Alan Cox452503f2005-10-21 19:01:32 -04002872 */
2873
2874 if (t->act8b + t->rec8b < t->cyc8b) {
2875 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
2876 t->rec8b = t->cyc8b - t->act8b;
2877 }
2878
2879 if (t->active + t->recover < t->cycle) {
2880 t->active += (t->cycle - (t->active + t->recover)) / 2;
2881 t->recover = t->cycle - t->active;
2882 }
Jeff Garzika617c092007-05-21 20:14:23 -04002883
Alan Cox4f701d12007-04-23 11:55:36 +01002884 /* In a few cases quantisation may produce enough errors to
2885 leave t->cycle too low for the sum of active and recovery
2886 if so we must correct this */
2887 if (t->active + t->recover > t->cycle)
2888 t->cycle = t->active + t->recover;
Alan Cox452503f2005-10-21 19:01:32 -04002889
2890 return 0;
2891}
2892
Tejun Heocf176e12006-04-02 17:54:46 +09002893/**
2894 * ata_down_xfermask_limit - adjust dev xfer masks downward
Tejun Heocf176e12006-04-02 17:54:46 +09002895 * @dev: Device to adjust xfer masks
Tejun Heo458337d2007-02-02 16:22:30 +09002896 * @sel: ATA_DNXFER_* selector
Tejun Heocf176e12006-04-02 17:54:46 +09002897 *
2898 * Adjust xfer masks of @dev downward. Note that this function
2899 * does not apply the change. Invoking ata_set_mode() afterwards
2900 * will apply the limit.
2901 *
2902 * LOCKING:
2903 * Inherited from caller.
2904 *
2905 * RETURNS:
2906 * 0 on success, negative errno on failure
2907 */
Tejun Heo458337d2007-02-02 16:22:30 +09002908int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
Tejun Heocf176e12006-04-02 17:54:46 +09002909{
Tejun Heo458337d2007-02-02 16:22:30 +09002910 char buf[32];
Tejun Heo7dc951a2007-11-27 19:43:42 +09002911 unsigned long orig_mask, xfer_mask;
2912 unsigned long pio_mask, mwdma_mask, udma_mask;
Tejun Heo458337d2007-02-02 16:22:30 +09002913 int quiet, highbit;
Tejun Heocf176e12006-04-02 17:54:46 +09002914
Tejun Heo458337d2007-02-02 16:22:30 +09002915 quiet = !!(sel & ATA_DNXFER_QUIET);
2916 sel &= ~ATA_DNXFER_QUIET;
Tejun Heocf176e12006-04-02 17:54:46 +09002917
Tejun Heo458337d2007-02-02 16:22:30 +09002918 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
2919 dev->mwdma_mask,
2920 dev->udma_mask);
2921 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
Tejun Heocf176e12006-04-02 17:54:46 +09002922
Tejun Heo458337d2007-02-02 16:22:30 +09002923 switch (sel) {
2924 case ATA_DNXFER_PIO:
2925 highbit = fls(pio_mask) - 1;
2926 pio_mask &= ~(1 << highbit);
2927 break;
2928
2929 case ATA_DNXFER_DMA:
2930 if (udma_mask) {
2931 highbit = fls(udma_mask) - 1;
2932 udma_mask &= ~(1 << highbit);
2933 if (!udma_mask)
2934 return -ENOENT;
2935 } else if (mwdma_mask) {
2936 highbit = fls(mwdma_mask) - 1;
2937 mwdma_mask &= ~(1 << highbit);
2938 if (!mwdma_mask)
2939 return -ENOENT;
2940 }
2941 break;
2942
2943 case ATA_DNXFER_40C:
2944 udma_mask &= ATA_UDMA_MASK_40C;
2945 break;
2946
2947 case ATA_DNXFER_FORCE_PIO0:
2948 pio_mask &= 1;
2949 case ATA_DNXFER_FORCE_PIO:
2950 mwdma_mask = 0;
2951 udma_mask = 0;
2952 break;
2953
Tejun Heo458337d2007-02-02 16:22:30 +09002954 default:
2955 BUG();
2956 }
2957
2958 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
2959
2960 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
2961 return -ENOENT;
2962
2963 if (!quiet) {
2964 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
2965 snprintf(buf, sizeof(buf), "%s:%s",
2966 ata_mode_string(xfer_mask),
2967 ata_mode_string(xfer_mask & ATA_MASK_PIO));
2968 else
2969 snprintf(buf, sizeof(buf), "%s",
2970 ata_mode_string(xfer_mask));
2971
2972 ata_dev_printk(dev, KERN_WARNING,
2973 "limiting speed to %s\n", buf);
2974 }
Tejun Heocf176e12006-04-02 17:54:46 +09002975
2976 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
2977 &dev->udma_mask);
2978
Tejun Heocf176e12006-04-02 17:54:46 +09002979 return 0;
Tejun Heocf176e12006-04-02 17:54:46 +09002980}
2981
Tejun Heo3373efd2006-05-15 20:57:53 +09002982static int ata_dev_set_mode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002983{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09002984 struct ata_eh_context *ehc = &dev->link->eh_context;
Tejun Heo83206a22006-03-24 15:25:31 +09002985 unsigned int err_mask;
2986 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987
Tejun Heoe8384602006-04-02 18:51:53 +09002988 dev->flags &= ~ATA_DFLAG_PIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002989 if (dev->xfer_shift == ATA_SHIFT_PIO)
2990 dev->flags |= ATA_DFLAG_PIO;
2991
Tejun Heo3373efd2006-05-15 20:57:53 +09002992 err_mask = ata_dev_set_xfermode(dev);
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002993
Alan11750a42007-02-05 16:28:30 +00002994 /* Old CFA may refuse this command, which is just fine */
2995 if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
Jeff Garzik2dcb4072007-10-19 06:42:56 -04002996 err_mask &= ~AC_ERR_DEV;
2997
Alan Cox0bc2a792007-07-31 14:01:48 +01002998 /* Some very old devices and some bad newer ones fail any kind of
2999 SET_XFERMODE request but support PIO0-2 timings and no IORDY */
3000 if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
3001 dev->pio_mode <= XFER_PIO_2)
3002 err_mask &= ~AC_ERR_DEV;
Jeff Garzik2dcb4072007-10-19 06:42:56 -04003003
Alan Cox3acaf942007-10-15 19:18:27 +01003004 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3005 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3006 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3007 dev->dma_mode == XFER_MW_DMA_0 &&
3008 (dev->id[63] >> 8) & 1)
3009 err_mask &= ~AC_ERR_DEV;
3010
Tejun Heo83206a22006-03-24 15:25:31 +09003011 if (err_mask) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003012 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3013 "(err_mask=0x%x)\n", err_mask);
Tejun Heo83206a22006-03-24 15:25:31 +09003014 return -EIO;
3015 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016
Tejun Heobaa1e782006-11-01 18:39:27 +09003017 ehc->i.flags |= ATA_EHI_POST_SETMODE;
Tejun Heo422c9da2007-09-23 13:14:12 +09003018 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
Tejun Heobaa1e782006-11-01 18:39:27 +09003019 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
Tejun Heo5eb45c02006-04-02 18:51:52 +09003020 if (rc)
Tejun Heo83206a22006-03-24 15:25:31 +09003021 return rc;
Tejun Heo48a8a142006-03-05 17:55:58 +09003022
Tejun Heo23e71c32006-03-06 04:31:57 +09003023 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3024 dev->xfer_shift, (int)dev->xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025
Tejun Heof15a1da2006-05-15 20:57:56 +09003026 ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
3027 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
Tejun Heo83206a22006-03-24 15:25:31 +09003028 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029}
3030
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031/**
Alan04351822007-03-06 02:37:52 -08003032 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
Tejun Heo02607312007-08-06 18:36:23 +09003033 * @link: link on which timings will be programmed
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003034 * @r_failed_dev: out paramter for failed device
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035 *
Alan04351822007-03-06 02:37:52 -08003036 * Standard implementation of the function used to tune and set
3037 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3038 * ata_dev_set_mode() fails, pointer to the failing device is
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003039 * returned in @r_failed_dev.
Jeff Garzik780a87f2005-05-30 15:41:05 -04003040 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003041 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003042 * PCI/etc. bus probe sem.
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003043 *
3044 * RETURNS:
3045 * 0 on success, negative errno otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046 */
Alan04351822007-03-06 02:37:52 -08003047
Tejun Heo02607312007-08-06 18:36:23 +09003048int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003049{
Tejun Heo02607312007-08-06 18:36:23 +09003050 struct ata_port *ap = link->ap;
Tejun Heoe8e06192006-04-01 01:38:18 +09003051 struct ata_device *dev;
Tejun Heof58229f2007-08-06 18:36:23 +09003052 int rc = 0, used_dma = 0, found = 0;
Tejun Heo3adcebb2006-05-15 20:57:37 +09003053
Tejun Heoa6d5a512006-03-06 04:31:57 +09003054 /* step 1: calculate xfer_mask */
Tejun Heof58229f2007-08-06 18:36:23 +09003055 ata_link_for_each_dev(dev, link) {
Tejun Heo7dc951a2007-11-27 19:43:42 +09003056 unsigned long pio_mask, dma_mask;
Alan Coxb3a70602007-10-02 12:38:26 -04003057 unsigned int mode_mask;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003058
Tejun Heoe1211e32006-04-01 01:38:18 +09003059 if (!ata_dev_enabled(dev))
Tejun Heoa6d5a512006-03-06 04:31:57 +09003060 continue;
3061
Alan Coxb3a70602007-10-02 12:38:26 -04003062 mode_mask = ATA_DMA_MASK_ATA;
3063 if (dev->class == ATA_DEV_ATAPI)
3064 mode_mask = ATA_DMA_MASK_ATAPI;
3065 else if (ata_id_is_cfa(dev->id))
3066 mode_mask = ATA_DMA_MASK_CFA;
3067
Tejun Heo3373efd2006-05-15 20:57:53 +09003068 ata_dev_xfermask(dev);
Tejun Heoa6d5a512006-03-06 04:31:57 +09003069
Tejun Heoacf356b2006-03-24 14:07:50 +09003070 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3071 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
Alan Coxb3a70602007-10-02 12:38:26 -04003072
3073 if (libata_dma_mask & mode_mask)
3074 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3075 else
3076 dma_mask = 0;
3077
Tejun Heoacf356b2006-03-24 14:07:50 +09003078 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3079 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01003080
Tejun Heo4f659772006-04-01 01:38:18 +09003081 found = 1;
Tejun Heo70cd0712007-11-27 19:43:40 +09003082 if (dev->dma_mode != 0xff)
Alan Cox5444a6f2006-03-27 18:58:20 +01003083 used_dma = 1;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003084 }
Tejun Heo4f659772006-04-01 01:38:18 +09003085 if (!found)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003086 goto out;
Tejun Heoa6d5a512006-03-06 04:31:57 +09003087
3088 /* step 2: always set host PIO timings */
Tejun Heof58229f2007-08-06 18:36:23 +09003089 ata_link_for_each_dev(dev, link) {
Tejun Heoe8e06192006-04-01 01:38:18 +09003090 if (!ata_dev_enabled(dev))
3091 continue;
3092
Tejun Heo70cd0712007-11-27 19:43:40 +09003093 if (dev->pio_mode == 0xff) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003094 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
Tejun Heoe8e06192006-04-01 01:38:18 +09003095 rc = -EINVAL;
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003096 goto out;
Tejun Heoe8e06192006-04-01 01:38:18 +09003097 }
3098
3099 dev->xfer_mode = dev->pio_mode;
3100 dev->xfer_shift = ATA_SHIFT_PIO;
3101 if (ap->ops->set_piomode)
3102 ap->ops->set_piomode(ap, dev);
3103 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104
Tejun Heoa6d5a512006-03-06 04:31:57 +09003105 /* step 3: set host DMA timings */
Tejun Heof58229f2007-08-06 18:36:23 +09003106 ata_link_for_each_dev(dev, link) {
Tejun Heo70cd0712007-11-27 19:43:40 +09003107 if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff)
Tejun Heoe8e06192006-04-01 01:38:18 +09003108 continue;
3109
3110 dev->xfer_mode = dev->dma_mode;
3111 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3112 if (ap->ops->set_dmamode)
3113 ap->ops->set_dmamode(ap, dev);
3114 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115
3116 /* step 4: update devices' xfer mode */
Tejun Heof58229f2007-08-06 18:36:23 +09003117 ata_link_for_each_dev(dev, link) {
Alan18d90de2007-01-24 11:42:38 +00003118 /* don't update suspended devices' xfer mode */
Tejun Heo9666f402007-05-04 21:27:47 +02003119 if (!ata_dev_enabled(dev))
Tejun Heo83206a22006-03-24 15:25:31 +09003120 continue;
3121
Tejun Heo3373efd2006-05-15 20:57:53 +09003122 rc = ata_dev_set_mode(dev);
Tejun Heo5bbc53f2006-04-01 01:38:17 +09003123 if (rc)
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003124 goto out;
Tejun Heo83206a22006-03-24 15:25:31 +09003125 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126
Tejun Heoe8e06192006-04-01 01:38:18 +09003127 /* Record simplex status. If we selected DMA then the other
3128 * host channels are not permitted to do so.
Alan Cox5444a6f2006-03-27 18:58:20 +01003129 */
Jeff Garzikcca39742006-08-24 03:19:22 -04003130 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
Alan032af1c2007-03-01 17:36:46 +00003131 ap->host->simplex_claimed = ap;
Alan Cox5444a6f2006-03-27 18:58:20 +01003132
Tejun Heoe82cbdb2006-04-01 01:38:18 +09003133 out:
3134 if (rc)
3135 *r_failed_dev = dev;
3136 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003137}
3138
3139/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05003140 * ata_tf_to_host - issue ATA taskfile to host controller
3141 * @ap: port to which command is being issued
3142 * @tf: ATA taskfile register set
3143 *
3144 * Issues ATA taskfile register set to ATA host controller,
3145 * with proper synchronization with interrupt handler and
3146 * other threads.
3147 *
3148 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04003149 * spin_lock_irqsave(host lock)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05003150 */
3151
3152static inline void ata_tf_to_host(struct ata_port *ap,
3153 const struct ata_taskfile *tf)
3154{
3155 ap->ops->tf_load(ap, tf);
3156 ap->ops->exec_command(ap, tf);
3157}
3158
3159/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 * ata_busy_sleep - sleep until BSY clears, or timeout
3161 * @ap: port containing status register to be polled
3162 * @tmout_pat: impatience timeout
3163 * @tmout: overall timeout
3164 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04003165 * Sleep until ATA Status register bit BSY clears,
3166 * or a timeout occurs.
3167 *
Tejun Heod1adc1b2006-10-09 18:32:15 +09003168 * LOCKING:
3169 * Kernel thread context (may sleep).
3170 *
3171 * RETURNS:
3172 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003173 */
Tejun Heod1adc1b2006-10-09 18:32:15 +09003174int ata_busy_sleep(struct ata_port *ap,
3175 unsigned long tmout_pat, unsigned long tmout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176{
3177 unsigned long timer_start, timeout;
3178 u8 status;
3179
3180 status = ata_busy_wait(ap, ATA_BUSY, 300);
3181 timer_start = jiffies;
3182 timeout = timer_start + tmout_pat;
Tejun Heod1adc1b2006-10-09 18:32:15 +09003183 while (status != 0xff && (status & ATA_BUSY) &&
3184 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185 msleep(50);
3186 status = ata_busy_wait(ap, ATA_BUSY, 3);
3187 }
3188
Tejun Heod1adc1b2006-10-09 18:32:15 +09003189 if (status != 0xff && (status & ATA_BUSY))
Tejun Heof15a1da2006-05-15 20:57:56 +09003190 ata_port_printk(ap, KERN_WARNING,
Jeff Garzik35aa7a42006-09-28 06:50:24 -04003191 "port is slow to respond, please be patient "
3192 "(Status 0x%x)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003193
3194 timeout = timer_start + tmout;
Tejun Heod1adc1b2006-10-09 18:32:15 +09003195 while (status != 0xff && (status & ATA_BUSY) &&
3196 time_before(jiffies, timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197 msleep(50);
3198 status = ata_chk_status(ap);
3199 }
3200
Tejun Heod1adc1b2006-10-09 18:32:15 +09003201 if (status == 0xff)
3202 return -ENODEV;
3203
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204 if (status & ATA_BUSY) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003205 ata_port_printk(ap, KERN_ERR, "port failed to respond "
Jeff Garzik35aa7a42006-09-28 06:50:24 -04003206 "(%lu secs, Status 0x%x)\n",
3207 tmout / HZ, status);
Tejun Heod1adc1b2006-10-09 18:32:15 +09003208 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003209 }
3210
3211 return 0;
3212}
3213
Tejun Heod4b2bab2007-02-02 16:50:52 +09003214/**
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003215 * ata_wait_after_reset - wait before checking status after reset
3216 * @ap: port containing status register to be polled
3217 * @deadline: deadline jiffies for the operation
3218 *
3219 * After reset, we need to pause a while before reading status.
3220 * Also, certain combination of controller and device report 0xff
3221 * for some duration (e.g. until SATA PHY is up and running)
3222 * which is interpreted as empty port in ATA world. This
3223 * function also waits for such devices to get out of 0xff
3224 * status.
3225 *
3226 * LOCKING:
3227 * Kernel thread context (may sleep).
3228 */
3229void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline)
3230{
3231 unsigned long until = jiffies + ATA_TMOUT_FF_WAIT;
3232
3233 if (time_before(until, deadline))
3234 deadline = until;
3235
3236 /* Spec mandates ">= 2ms" before checking status. We wait
3237 * 150ms, because that was the magic delay used for ATAPI
3238 * devices in Hale Landis's ATADRVR, for the period of time
3239 * between when the ATA command register is written, and then
3240 * status is checked. Because waiting for "a while" before
3241 * checking status is fine, post SRST, we perform this magic
3242 * delay here as well.
3243 *
3244 * Old drivers/ide uses the 2mS rule and then waits for ready.
3245 */
3246 msleep(150);
3247
3248 /* Wait for 0xff to clear. Some SATA devices take a long time
3249 * to clear 0xff after reset. For example, HHD424020F7SV00
3250 * iVDR needs >= 800ms while. Quantum GoVault needs even more
3251 * than that.
Tejun Heo1974e202007-11-08 11:20:18 +09003252 *
3253 * Note that some PATA controllers (pata_ali) explode if
3254 * status register is read more than once when there's no
3255 * device attached.
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003256 */
Tejun Heo1974e202007-11-08 11:20:18 +09003257 if (ap->flags & ATA_FLAG_SATA) {
3258 while (1) {
3259 u8 status = ata_chk_status(ap);
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003260
Tejun Heo1974e202007-11-08 11:20:18 +09003261 if (status != 0xff || time_after(jiffies, deadline))
3262 return;
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003263
Tejun Heo1974e202007-11-08 11:20:18 +09003264 msleep(50);
3265 }
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003266 }
3267}
3268
3269/**
Tejun Heod4b2bab2007-02-02 16:50:52 +09003270 * ata_wait_ready - sleep until BSY clears, or timeout
3271 * @ap: port containing status register to be polled
3272 * @deadline: deadline jiffies for the operation
3273 *
3274 * Sleep until ATA Status register bit BSY clears, or timeout
3275 * occurs.
3276 *
3277 * LOCKING:
3278 * Kernel thread context (may sleep).
3279 *
3280 * RETURNS:
3281 * 0 on success, -errno otherwise.
3282 */
3283int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
3284{
3285 unsigned long start = jiffies;
3286 int warned = 0;
3287
3288 while (1) {
3289 u8 status = ata_chk_status(ap);
3290 unsigned long now = jiffies;
3291
3292 if (!(status & ATA_BUSY))
3293 return 0;
Tejun Heo936fd732007-08-06 18:36:23 +09003294 if (!ata_link_online(&ap->link) && status == 0xff)
Tejun Heod4b2bab2007-02-02 16:50:52 +09003295 return -ENODEV;
3296 if (time_after(now, deadline))
3297 return -EBUSY;
3298
3299 if (!warned && time_after(now, start + 5 * HZ) &&
3300 (deadline - now > 3 * HZ)) {
3301 ata_port_printk(ap, KERN_WARNING,
3302 "port is slow to respond, please be patient "
3303 "(Status 0x%x)\n", status);
3304 warned = 1;
3305 }
3306
3307 msleep(50);
3308 }
3309}
3310
3311static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask,
3312 unsigned long deadline)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003313{
3314 struct ata_ioports *ioaddr = &ap->ioaddr;
3315 unsigned int dev0 = devmask & (1 << 0);
3316 unsigned int dev1 = devmask & (1 << 1);
Tejun Heo9b893912007-02-02 16:50:52 +09003317 int rc, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003318
3319 /* if device 0 was found in ata_devchk, wait for its
3320 * BSY bit to clear
3321 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003322 if (dev0) {
3323 rc = ata_wait_ready(ap, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003324 if (rc) {
3325 if (rc != -ENODEV)
3326 return rc;
3327 ret = rc;
3328 }
Tejun Heod4b2bab2007-02-02 16:50:52 +09003329 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003330
Tejun Heoe141d992007-06-10 14:26:20 +09003331 /* if device 1 was found in ata_devchk, wait for register
3332 * access briefly, then wait for BSY to clear.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003333 */
Tejun Heoe141d992007-06-10 14:26:20 +09003334 if (dev1) {
3335 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003336
3337 ap->ops->dev_select(ap, 1);
Tejun Heoe141d992007-06-10 14:26:20 +09003338
3339 /* Wait for register access. Some ATAPI devices fail
3340 * to set nsect/lbal after reset, so don't waste too
3341 * much time on it. We're gonna wait for !BSY anyway.
3342 */
3343 for (i = 0; i < 2; i++) {
3344 u8 nsect, lbal;
3345
3346 nsect = ioread8(ioaddr->nsect_addr);
3347 lbal = ioread8(ioaddr->lbal_addr);
3348 if ((nsect == 1) && (lbal == 1))
3349 break;
3350 msleep(50); /* give drive a breather */
3351 }
3352
Tejun Heod4b2bab2007-02-02 16:50:52 +09003353 rc = ata_wait_ready(ap, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003354 if (rc) {
3355 if (rc != -ENODEV)
3356 return rc;
3357 ret = rc;
3358 }
Tejun Heod4b2bab2007-02-02 16:50:52 +09003359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003360
3361 /* is all this really necessary? */
3362 ap->ops->dev_select(ap, 0);
3363 if (dev1)
3364 ap->ops->dev_select(ap, 1);
3365 if (dev0)
3366 ap->ops->dev_select(ap, 0);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003367
Tejun Heo9b893912007-02-02 16:50:52 +09003368 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003369}
3370
Tejun Heod4b2bab2007-02-02 16:50:52 +09003371static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
3372 unsigned long deadline)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373{
3374 struct ata_ioports *ioaddr = &ap->ioaddr;
3375
Tejun Heo44877b42007-02-21 01:06:51 +09003376 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003377
3378 /* software reset. causes dev0 to be selected */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003379 iowrite8(ap->ctl, ioaddr->ctl_addr);
3380 udelay(20); /* FIXME: flush */
3381 iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
3382 udelay(20); /* FIXME: flush */
3383 iowrite8(ap->ctl, ioaddr->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003384
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003385 /* wait a while before checking status */
3386 ata_wait_after_reset(ap, deadline);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003387
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05003388 /* Before we perform post reset processing we want to see if
Tejun Heo298a41c2006-03-25 02:58:13 +09003389 * the bus shows 0xFF because the odd clown forgets the D7
3390 * pulldown resistor.
3391 */
Alan Cox150981b2007-10-23 16:50:02 +01003392 if (ata_chk_status(ap) == 0xFF)
Tejun Heo9b893912007-02-02 16:50:52 +09003393 return -ENODEV;
Alan Cox09c7ad72006-03-22 15:52:40 +00003394
Tejun Heod4b2bab2007-02-02 16:50:52 +09003395 return ata_bus_post_reset(ap, devmask, deadline);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396}
3397
3398/**
3399 * ata_bus_reset - reset host port and associated ATA channel
3400 * @ap: port to reset
3401 *
3402 * This is typically the first time we actually start issuing
3403 * commands to the ATA channel. We wait for BSY to clear, then
3404 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
3405 * result. Determine what devices, if any, are on the channel
3406 * by looking at the device 0/1 error register. Look at the signature
3407 * stored in each device's taskfile registers, to determine if
3408 * the device is ATA or ATAPI.
3409 *
3410 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04003411 * PCI/etc. bus probe sem.
Jeff Garzikcca39742006-08-24 03:19:22 -04003412 * Obtains host lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003413 *
3414 * SIDE EFFECTS:
Tejun Heo198e0fe2006-04-02 18:51:52 +09003415 * Sets ATA_FLAG_DISABLED if bus reset fails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003416 */
3417
3418void ata_bus_reset(struct ata_port *ap)
3419{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003420 struct ata_device *device = ap->link.device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003421 struct ata_ioports *ioaddr = &ap->ioaddr;
3422 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
3423 u8 err;
Tejun Heoaec5c3c2006-03-25 01:33:34 +09003424 unsigned int dev0, dev1 = 0, devmask = 0;
Tejun Heo9b893912007-02-02 16:50:52 +09003425 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003426
Tejun Heo44877b42007-02-21 01:06:51 +09003427 DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428
3429 /* determine if device 0/1 are present */
3430 if (ap->flags & ATA_FLAG_SATA_RESET)
3431 dev0 = 1;
3432 else {
3433 dev0 = ata_devchk(ap, 0);
3434 if (slave_possible)
3435 dev1 = ata_devchk(ap, 1);
3436 }
3437
3438 if (dev0)
3439 devmask |= (1 << 0);
3440 if (dev1)
3441 devmask |= (1 << 1);
3442
3443 /* select device 0 again */
3444 ap->ops->dev_select(ap, 0);
3445
3446 /* issue bus reset */
Tejun Heo9b893912007-02-02 16:50:52 +09003447 if (ap->flags & ATA_FLAG_SRST) {
3448 rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
3449 if (rc && rc != -ENODEV)
Tejun Heoaec5c3c2006-03-25 01:33:34 +09003450 goto err_out;
Tejun Heo9b893912007-02-02 16:50:52 +09003451 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003452
3453 /*
3454 * determine by signature whether we have ATA or ATAPI devices
3455 */
Tejun Heo3f198592007-09-02 23:23:57 +09003456 device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003457 if ((slave_possible) && (err != 0x81))
Tejun Heo3f198592007-09-02 23:23:57 +09003458 device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003459
Linus Torvalds1da177e2005-04-16 15:20:36 -07003460 /* is double-select really necessary? */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003461 if (device[1].class != ATA_DEV_NONE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462 ap->ops->dev_select(ap, 1);
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003463 if (device[0].class != ATA_DEV_NONE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003464 ap->ops->dev_select(ap, 0);
3465
3466 /* if no devices were detected, disable this port */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003467 if ((device[0].class == ATA_DEV_NONE) &&
3468 (device[1].class == ATA_DEV_NONE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469 goto err_out;
3470
3471 if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
3472 /* set up device control for ATA_FLAG_SATA_RESET */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003473 iowrite8(ap->ctl, ioaddr->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003474 }
3475
3476 DPRINTK("EXIT\n");
3477 return;
3478
3479err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09003480 ata_port_printk(ap, KERN_ERR, "disabling port\n");
Jeff Garzikac8869d2007-08-16 03:17:03 -04003481 ata_port_disable(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003482
3483 DPRINTK("EXIT\n");
3484}
3485
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003486/**
Tejun Heo936fd732007-08-06 18:36:23 +09003487 * sata_link_debounce - debounce SATA phy status
3488 * @link: ATA link to debounce SATA phy status for
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003489 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003490 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003491 *
Tejun Heo936fd732007-08-06 18:36:23 +09003492* Make sure SStatus of @link reaches stable state, determined by
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003493 * holding the same value where DET is not 1 for @duration polled
3494 * every @interval, before @timeout. Timeout constraints the
Tejun Heod4b2bab2007-02-02 16:50:52 +09003495 * beginning of the stable state. Because DET gets stuck at 1 on
3496 * some controllers after hot unplugging, this functions waits
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003497 * until timeout then returns 0 if DET is stable at 1.
3498 *
Tejun Heod4b2bab2007-02-02 16:50:52 +09003499 * @timeout is further limited by @deadline. The sooner of the
3500 * two is used.
3501 *
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003502 * LOCKING:
3503 * Kernel thread context (may sleep)
3504 *
3505 * RETURNS:
3506 * 0 on success, -errno on failure.
3507 */
Tejun Heo936fd732007-08-06 18:36:23 +09003508int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3509 unsigned long deadline)
Tejun Heo7a7921e2006-02-02 18:20:00 +09003510{
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003511 unsigned long interval_msec = params[0];
Tejun Heod4b2bab2007-02-02 16:50:52 +09003512 unsigned long duration = msecs_to_jiffies(params[1]);
3513 unsigned long last_jiffies, t;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003514 u32 last, cur;
3515 int rc;
3516
Tejun Heod4b2bab2007-02-02 16:50:52 +09003517 t = jiffies + msecs_to_jiffies(params[2]);
3518 if (time_before(t, deadline))
3519 deadline = t;
3520
Tejun Heo936fd732007-08-06 18:36:23 +09003521 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003522 return rc;
3523 cur &= 0xf;
3524
3525 last = cur;
3526 last_jiffies = jiffies;
3527
3528 while (1) {
3529 msleep(interval_msec);
Tejun Heo936fd732007-08-06 18:36:23 +09003530 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003531 return rc;
3532 cur &= 0xf;
3533
3534 /* DET stable? */
3535 if (cur == last) {
Tejun Heod4b2bab2007-02-02 16:50:52 +09003536 if (cur == 1 && time_before(jiffies, deadline))
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003537 continue;
3538 if (time_after(jiffies, last_jiffies + duration))
3539 return 0;
3540 continue;
3541 }
3542
3543 /* unstable, start over */
3544 last = cur;
3545 last_jiffies = jiffies;
3546
Tejun Heof1545152007-07-16 14:29:40 +09003547 /* Check deadline. If debouncing failed, return
3548 * -EPIPE to tell upper layer to lower link speed.
3549 */
Tejun Heod4b2bab2007-02-02 16:50:52 +09003550 if (time_after(jiffies, deadline))
Tejun Heof1545152007-07-16 14:29:40 +09003551 return -EPIPE;
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003552 }
3553}
3554
3555/**
Tejun Heo936fd732007-08-06 18:36:23 +09003556 * sata_link_resume - resume SATA link
3557 * @link: ATA link to resume SATA
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003558 * @params: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003559 * @deadline: deadline jiffies for the operation
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003560 *
Tejun Heo936fd732007-08-06 18:36:23 +09003561 * Resume SATA phy @link and debounce it.
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003562 *
3563 * LOCKING:
3564 * Kernel thread context (may sleep)
3565 *
3566 * RETURNS:
3567 * 0 on success, -errno on failure.
3568 */
Tejun Heo936fd732007-08-06 18:36:23 +09003569int sata_link_resume(struct ata_link *link, const unsigned long *params,
3570 unsigned long deadline)
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003571{
3572 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003573 int rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003574
Tejun Heo936fd732007-08-06 18:36:23 +09003575 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003576 return rc;
3577
Tejun Heo852ee162006-04-01 01:38:18 +09003578 scontrol = (scontrol & 0x0f0) | 0x300;
Tejun Heo81952c52006-05-15 20:57:47 +09003579
Tejun Heo936fd732007-08-06 18:36:23 +09003580 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heo81952c52006-05-15 20:57:47 +09003581 return rc;
Tejun Heo7a7921e2006-02-02 18:20:00 +09003582
Tejun Heod7bb4cc2006-05-31 18:27:46 +09003583 /* Some PHYs react badly if SStatus is pounded immediately
3584 * after resuming. Delay 200ms before debouncing.
3585 */
3586 msleep(200);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003587
Tejun Heo936fd732007-08-06 18:36:23 +09003588 return sata_link_debounce(link, params, deadline);
Tejun Heo7a7921e2006-02-02 18:20:00 +09003589}
3590
Tejun Heof5914a42006-05-31 18:27:48 +09003591/**
3592 * ata_std_prereset - prepare for reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003593 * @link: ATA link to be reset
Tejun Heod4b2bab2007-02-02 16:50:52 +09003594 * @deadline: deadline jiffies for the operation
Tejun Heof5914a42006-05-31 18:27:48 +09003595 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003596 * @link is about to be reset. Initialize it. Failure from
Tejun Heob8cffc62007-02-02 16:50:52 +09003597 * prereset makes libata abort whole reset sequence and give up
3598 * that port, so prereset should be best-effort. It does its
3599 * best to prepare for reset sequence but if things go wrong, it
3600 * should just whine, not fail.
Tejun Heof5914a42006-05-31 18:27:48 +09003601 *
3602 * LOCKING:
3603 * Kernel thread context (may sleep)
3604 *
3605 * RETURNS:
3606 * 0 on success, -errno otherwise.
3607 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003608int ata_std_prereset(struct ata_link *link, unsigned long deadline)
Tejun Heof5914a42006-05-31 18:27:48 +09003609{
Tejun Heocc0680a2007-08-06 18:36:23 +09003610 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003611 struct ata_eh_context *ehc = &link->eh_context;
Tejun Heoe9c83912006-07-03 16:07:26 +09003612 const unsigned long *timing = sata_ehc_deb_timing(ehc);
Tejun Heof5914a42006-05-31 18:27:48 +09003613 int rc;
3614
Tejun Heo31daabd2007-02-02 16:50:52 +09003615 /* handle link resume */
Tejun Heo28324302006-07-03 16:07:26 +09003616 if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
Tejun Heo0c887582007-08-06 18:36:23 +09003617 (link->flags & ATA_LFLAG_HRST_TO_RESUME))
Tejun Heo28324302006-07-03 16:07:26 +09003618 ehc->i.action |= ATA_EH_HARDRESET;
3619
Tejun Heo633273a2007-09-23 13:19:54 +09003620 /* Some PMPs don't work with only SRST, force hardreset if PMP
3621 * is supported.
3622 */
3623 if (ap->flags & ATA_FLAG_PMP)
3624 ehc->i.action |= ATA_EH_HARDRESET;
3625
Tejun Heof5914a42006-05-31 18:27:48 +09003626 /* if we're about to do hardreset, nothing more to do */
3627 if (ehc->i.action & ATA_EH_HARDRESET)
3628 return 0;
3629
Tejun Heo936fd732007-08-06 18:36:23 +09003630 /* if SATA, resume link */
Tejun Heoa16abc02007-05-21 18:33:47 +02003631 if (ap->flags & ATA_FLAG_SATA) {
Tejun Heo936fd732007-08-06 18:36:23 +09003632 rc = sata_link_resume(link, timing, deadline);
Tejun Heob8cffc62007-02-02 16:50:52 +09003633 /* whine about phy resume failure but proceed */
3634 if (rc && rc != -EOPNOTSUPP)
Tejun Heocc0680a2007-08-06 18:36:23 +09003635 ata_link_printk(link, KERN_WARNING, "failed to resume "
Tejun Heof5914a42006-05-31 18:27:48 +09003636 "link for reset (errno=%d)\n", rc);
Tejun Heof5914a42006-05-31 18:27:48 +09003637 }
3638
3639 /* Wait for !BSY if the controller can wait for the first D2H
3640 * Reg FIS and we don't know that no device is attached.
3641 */
Tejun Heo0c887582007-08-06 18:36:23 +09003642 if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
Tejun Heob8cffc62007-02-02 16:50:52 +09003643 rc = ata_wait_ready(ap, deadline);
Tejun Heo6dffaf62007-05-23 11:58:52 +02003644 if (rc && rc != -ENODEV) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003645 ata_link_printk(link, KERN_WARNING, "device not ready "
Tejun Heob8cffc62007-02-02 16:50:52 +09003646 "(errno=%d), forcing hardreset\n", rc);
3647 ehc->i.action |= ATA_EH_HARDRESET;
3648 }
3649 }
Tejun Heof5914a42006-05-31 18:27:48 +09003650
3651 return 0;
3652}
3653
Tejun Heoc2bd5802006-01-24 17:05:22 +09003654/**
3655 * ata_std_softreset - reset host port via ATA SRST
Tejun Heocc0680a2007-08-06 18:36:23 +09003656 * @link: ATA link to reset
Tejun Heoc2bd5802006-01-24 17:05:22 +09003657 * @classes: resulting classes of attached devices
Tejun Heod4b2bab2007-02-02 16:50:52 +09003658 * @deadline: deadline jiffies for the operation
Tejun Heoc2bd5802006-01-24 17:05:22 +09003659 *
Tejun Heo52783c52006-05-31 18:28:22 +09003660 * Reset host port using ATA SRST.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003661 *
3662 * LOCKING:
3663 * Kernel thread context (may sleep)
3664 *
3665 * RETURNS:
3666 * 0 on success, -errno otherwise.
3667 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003668int ata_std_softreset(struct ata_link *link, unsigned int *classes,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003669 unsigned long deadline)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003670{
Tejun Heocc0680a2007-08-06 18:36:23 +09003671 struct ata_port *ap = link->ap;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003672 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
Tejun Heod4b2bab2007-02-02 16:50:52 +09003673 unsigned int devmask = 0;
3674 int rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003675 u8 err;
3676
3677 DPRINTK("ENTER\n");
3678
Tejun Heo936fd732007-08-06 18:36:23 +09003679 if (ata_link_offline(link)) {
Tejun Heo3a397462006-02-10 23:58:48 +09003680 classes[0] = ATA_DEV_NONE;
3681 goto out;
3682 }
3683
Tejun Heoc2bd5802006-01-24 17:05:22 +09003684 /* determine if device 0/1 are present */
3685 if (ata_devchk(ap, 0))
3686 devmask |= (1 << 0);
3687 if (slave_possible && ata_devchk(ap, 1))
3688 devmask |= (1 << 1);
3689
Tejun Heoc2bd5802006-01-24 17:05:22 +09003690 /* select device 0 again */
3691 ap->ops->dev_select(ap, 0);
3692
3693 /* issue bus reset */
3694 DPRINTK("about to softreset, devmask=%x\n", devmask);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003695 rc = ata_bus_softreset(ap, devmask, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003696 /* if link is occupied, -ENODEV too is an error */
Tejun Heo936fd732007-08-06 18:36:23 +09003697 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003698 ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
Tejun Heod4b2bab2007-02-02 16:50:52 +09003699 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003700 }
3701
3702 /* determine by signature whether we have ATA or ATAPI devices */
Tejun Heo3f198592007-09-02 23:23:57 +09003703 classes[0] = ata_dev_try_classify(&link->device[0],
3704 devmask & (1 << 0), &err);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003705 if (slave_possible && err != 0x81)
Tejun Heo3f198592007-09-02 23:23:57 +09003706 classes[1] = ata_dev_try_classify(&link->device[1],
3707 devmask & (1 << 1), &err);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003708
Tejun Heo3a397462006-02-10 23:58:48 +09003709 out:
Tejun Heoc2bd5802006-01-24 17:05:22 +09003710 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
3711 return 0;
3712}
3713
3714/**
Tejun Heocc0680a2007-08-06 18:36:23 +09003715 * sata_link_hardreset - reset link via SATA phy reset
3716 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003717 * @timing: timing parameters { interval, duratinon, timeout } in msec
Tejun Heod4b2bab2007-02-02 16:50:52 +09003718 * @deadline: deadline jiffies for the operation
Tejun Heoc2bd5802006-01-24 17:05:22 +09003719 *
Tejun Heocc0680a2007-08-06 18:36:23 +09003720 * SATA phy-reset @link using DET bits of SControl register.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003721 *
3722 * LOCKING:
3723 * Kernel thread context (may sleep)
3724 *
3725 * RETURNS:
3726 * 0 on success, -errno otherwise.
3727 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003728int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003729 unsigned long deadline)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003730{
Tejun Heo852ee162006-04-01 01:38:18 +09003731 u32 scontrol;
Tejun Heo81952c52006-05-15 20:57:47 +09003732 int rc;
Tejun Heo852ee162006-04-01 01:38:18 +09003733
Tejun Heoc2bd5802006-01-24 17:05:22 +09003734 DPRINTK("ENTER\n");
3735
Tejun Heo936fd732007-08-06 18:36:23 +09003736 if (sata_set_spd_needed(link)) {
Tejun Heo1c3fae42006-04-02 20:53:28 +09003737 /* SATA spec says nothing about how to reconfigure
3738 * spd. To be on the safe side, turn off phy during
3739 * reconfiguration. This works for at least ICH7 AHCI
3740 * and Sil3124.
3741 */
Tejun Heo936fd732007-08-06 18:36:23 +09003742 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003743 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003744
Martin Hicksa34b6fc2006-07-05 15:06:13 -04003745 scontrol = (scontrol & 0x0f0) | 0x304;
Tejun Heo81952c52006-05-15 20:57:47 +09003746
Tejun Heo936fd732007-08-06 18:36:23 +09003747 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003748 goto out;
Tejun Heo1c3fae42006-04-02 20:53:28 +09003749
Tejun Heo936fd732007-08-06 18:36:23 +09003750 sata_set_spd(link);
Tejun Heo1c3fae42006-04-02 20:53:28 +09003751 }
3752
3753 /* issue phy wake/reset */
Tejun Heo936fd732007-08-06 18:36:23 +09003754 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003755 goto out;
Tejun Heo81952c52006-05-15 20:57:47 +09003756
Tejun Heo852ee162006-04-01 01:38:18 +09003757 scontrol = (scontrol & 0x0f0) | 0x301;
Tejun Heo81952c52006-05-15 20:57:47 +09003758
Tejun Heo936fd732007-08-06 18:36:23 +09003759 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
Tejun Heob6103f62006-11-01 17:59:53 +09003760 goto out;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003761
Tejun Heo1c3fae42006-04-02 20:53:28 +09003762 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
Tejun Heoc2bd5802006-01-24 17:05:22 +09003763 * 10.4.2 says at least 1 ms.
3764 */
3765 msleep(1);
3766
Tejun Heo936fd732007-08-06 18:36:23 +09003767 /* bring link back */
3768 rc = sata_link_resume(link, timing, deadline);
Tejun Heob6103f62006-11-01 17:59:53 +09003769 out:
3770 DPRINTK("EXIT, rc=%d\n", rc);
3771 return rc;
3772}
3773
3774/**
3775 * sata_std_hardreset - reset host port via SATA phy reset
Tejun Heocc0680a2007-08-06 18:36:23 +09003776 * @link: link to reset
Tejun Heob6103f62006-11-01 17:59:53 +09003777 * @class: resulting class of attached device
Tejun Heod4b2bab2007-02-02 16:50:52 +09003778 * @deadline: deadline jiffies for the operation
Tejun Heob6103f62006-11-01 17:59:53 +09003779 *
3780 * SATA phy-reset host port using DET bits of SControl register,
3781 * wait for !BSY and classify the attached device.
3782 *
3783 * LOCKING:
3784 * Kernel thread context (may sleep)
3785 *
3786 * RETURNS:
3787 * 0 on success, -errno otherwise.
3788 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003789int sata_std_hardreset(struct ata_link *link, unsigned int *class,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003790 unsigned long deadline)
Tejun Heob6103f62006-11-01 17:59:53 +09003791{
Tejun Heocc0680a2007-08-06 18:36:23 +09003792 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09003793 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
Tejun Heob6103f62006-11-01 17:59:53 +09003794 int rc;
3795
3796 DPRINTK("ENTER\n");
3797
3798 /* do hardreset */
Tejun Heocc0680a2007-08-06 18:36:23 +09003799 rc = sata_link_hardreset(link, timing, deadline);
Tejun Heob6103f62006-11-01 17:59:53 +09003800 if (rc) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003801 ata_link_printk(link, KERN_ERR,
Tejun Heob6103f62006-11-01 17:59:53 +09003802 "COMRESET failed (errno=%d)\n", rc);
3803 return rc;
3804 }
Tejun Heoc2bd5802006-01-24 17:05:22 +09003805
Tejun Heoc2bd5802006-01-24 17:05:22 +09003806 /* TODO: phy layer with polling, timeouts, etc. */
Tejun Heo936fd732007-08-06 18:36:23 +09003807 if (ata_link_offline(link)) {
Tejun Heoc2bd5802006-01-24 17:05:22 +09003808 *class = ATA_DEV_NONE;
3809 DPRINTK("EXIT, link offline\n");
3810 return 0;
3811 }
3812
Tejun Heo88ff6ea2007-10-16 14:21:24 -07003813 /* wait a while before checking status */
3814 ata_wait_after_reset(ap, deadline);
Tejun Heo34fee222007-02-02 15:29:27 +09003815
Tejun Heo633273a2007-09-23 13:19:54 +09003816 /* If PMP is supported, we have to do follow-up SRST. Note
3817 * that some PMPs don't send D2H Reg FIS after hardreset at
3818 * all if the first port is empty. Wait for it just for a
3819 * second and request follow-up SRST.
3820 */
3821 if (ap->flags & ATA_FLAG_PMP) {
3822 ata_wait_ready(ap, jiffies + HZ);
3823 return -EAGAIN;
3824 }
3825
Tejun Heod4b2bab2007-02-02 16:50:52 +09003826 rc = ata_wait_ready(ap, deadline);
Tejun Heo9b893912007-02-02 16:50:52 +09003827 /* link occupied, -ENODEV too is an error */
3828 if (rc) {
Tejun Heocc0680a2007-08-06 18:36:23 +09003829 ata_link_printk(link, KERN_ERR,
Tejun Heod4b2bab2007-02-02 16:50:52 +09003830 "COMRESET failed (errno=%d)\n", rc);
3831 return rc;
Tejun Heoc2bd5802006-01-24 17:05:22 +09003832 }
3833
Tejun Heo3a397462006-02-10 23:58:48 +09003834 ap->ops->dev_select(ap, 0); /* probably unnecessary */
3835
Tejun Heo3f198592007-09-02 23:23:57 +09003836 *class = ata_dev_try_classify(link->device, 1, NULL);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003837
3838 DPRINTK("EXIT, class=%u\n", *class);
3839 return 0;
3840}
3841
3842/**
3843 * ata_std_postreset - standard postreset callback
Tejun Heocc0680a2007-08-06 18:36:23 +09003844 * @link: the target ata_link
Tejun Heoc2bd5802006-01-24 17:05:22 +09003845 * @classes: classes of attached devices
3846 *
3847 * This function is invoked after a successful reset. Note that
3848 * the device might have been reset more than once using
3849 * different reset methods before postreset is invoked.
Tejun Heoc2bd5802006-01-24 17:05:22 +09003850 *
Tejun Heoc2bd5802006-01-24 17:05:22 +09003851 * LOCKING:
3852 * Kernel thread context (may sleep)
3853 */
Tejun Heocc0680a2007-08-06 18:36:23 +09003854void ata_std_postreset(struct ata_link *link, unsigned int *classes)
Tejun Heoc2bd5802006-01-24 17:05:22 +09003855{
Tejun Heocc0680a2007-08-06 18:36:23 +09003856 struct ata_port *ap = link->ap;
Tejun Heodc2b3512006-05-15 20:58:00 +09003857 u32 serror;
3858
Tejun Heoc2bd5802006-01-24 17:05:22 +09003859 DPRINTK("ENTER\n");
3860
Tejun Heoc2bd5802006-01-24 17:05:22 +09003861 /* print link status */
Tejun Heo936fd732007-08-06 18:36:23 +09003862 sata_print_link_status(link);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003863
Tejun Heodc2b3512006-05-15 20:58:00 +09003864 /* clear SError */
Tejun Heo936fd732007-08-06 18:36:23 +09003865 if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
3866 sata_scr_write(link, SCR_ERROR, serror);
Tejun Heof7fe7ad2007-12-08 08:47:01 +09003867 link->eh_info.serror = 0;
Tejun Heodc2b3512006-05-15 20:58:00 +09003868
Tejun Heoc2bd5802006-01-24 17:05:22 +09003869 /* is double-select really necessary? */
3870 if (classes[0] != ATA_DEV_NONE)
3871 ap->ops->dev_select(ap, 1);
3872 if (classes[1] != ATA_DEV_NONE)
3873 ap->ops->dev_select(ap, 0);
3874
Tejun Heo3a397462006-02-10 23:58:48 +09003875 /* bail out if no device is present */
3876 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
3877 DPRINTK("EXIT, no device\n");
3878 return;
3879 }
3880
3881 /* set up device control */
Tejun Heo0d5ff562007-02-01 15:06:36 +09003882 if (ap->ioaddr.ctl_addr)
3883 iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
Tejun Heoc2bd5802006-01-24 17:05:22 +09003884
3885 DPRINTK("EXIT\n");
3886}
3887
Tejun Heoa62c0fc2006-01-24 17:05:22 +09003888/**
Tejun Heo623a3122006-03-05 17:55:58 +09003889 * ata_dev_same_device - Determine whether new ID matches configured device
Tejun Heo623a3122006-03-05 17:55:58 +09003890 * @dev: device to compare against
3891 * @new_class: class of the new device
3892 * @new_id: IDENTIFY page of the new device
3893 *
3894 * Compare @new_class and @new_id against @dev and determine
3895 * whether @dev is the device indicated by @new_class and
3896 * @new_id.
3897 *
3898 * LOCKING:
3899 * None.
3900 *
3901 * RETURNS:
3902 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3903 */
Tejun Heo3373efd2006-05-15 20:57:53 +09003904static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3905 const u16 *new_id)
Tejun Heo623a3122006-03-05 17:55:58 +09003906{
3907 const u16 *old_id = dev->id;
Tejun Heoa0cf7332007-01-02 20:18:49 +09003908 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3909 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
Tejun Heo623a3122006-03-05 17:55:58 +09003910
3911 if (dev->class != new_class) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003912 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3913 dev->class, new_class);
Tejun Heo623a3122006-03-05 17:55:58 +09003914 return 0;
3915 }
3916
Tejun Heoa0cf7332007-01-02 20:18:49 +09003917 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3918 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3919 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3920 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
Tejun Heo623a3122006-03-05 17:55:58 +09003921
3922 if (strcmp(model[0], model[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003923 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3924 "'%s' != '%s'\n", model[0], model[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003925 return 0;
3926 }
3927
3928 if (strcmp(serial[0], serial[1])) {
Tejun Heof15a1da2006-05-15 20:57:56 +09003929 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3930 "'%s' != '%s'\n", serial[0], serial[1]);
Tejun Heo623a3122006-03-05 17:55:58 +09003931 return 0;
3932 }
3933
Tejun Heo623a3122006-03-05 17:55:58 +09003934 return 1;
3935}
3936
3937/**
Tejun Heofe309112007-05-15 03:28:15 +09003938 * ata_dev_reread_id - Re-read IDENTIFY data
Henrik Kretzschmar3fae4502007-06-19 10:10:50 +02003939 * @dev: target ATA device
Tejun Heobff04642006-11-10 18:08:10 +09003940 * @readid_flags: read ID flags
Tejun Heo623a3122006-03-05 17:55:58 +09003941 *
3942 * Re-read IDENTIFY page and make sure @dev is still attached to
3943 * the port.
3944 *
3945 * LOCKING:
3946 * Kernel thread context (may sleep)
3947 *
3948 * RETURNS:
3949 * 0 on success, negative errno otherwise
3950 */
Tejun Heofe309112007-05-15 03:28:15 +09003951int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
Tejun Heo623a3122006-03-05 17:55:58 +09003952{
Tejun Heo5eb45c02006-04-02 18:51:52 +09003953 unsigned int class = dev->class;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09003954 u16 *id = (void *)dev->link->ap->sector_buf;
Tejun Heo623a3122006-03-05 17:55:58 +09003955 int rc;
3956
Tejun Heofe635c72006-05-15 20:57:35 +09003957 /* read ID data */
Tejun Heobff04642006-11-10 18:08:10 +09003958 rc = ata_dev_read_id(dev, &class, readid_flags, id);
Tejun Heo623a3122006-03-05 17:55:58 +09003959 if (rc)
Tejun Heofe309112007-05-15 03:28:15 +09003960 return rc;
Tejun Heo623a3122006-03-05 17:55:58 +09003961
3962 /* is the device still there? */
Tejun Heofe309112007-05-15 03:28:15 +09003963 if (!ata_dev_same_device(dev, class, id))
3964 return -ENODEV;
Tejun Heo623a3122006-03-05 17:55:58 +09003965
Tejun Heofe635c72006-05-15 20:57:35 +09003966 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
Tejun Heofe309112007-05-15 03:28:15 +09003967 return 0;
3968}
3969
3970/**
3971 * ata_dev_revalidate - Revalidate ATA device
3972 * @dev: device to revalidate
Tejun Heo422c9da2007-09-23 13:14:12 +09003973 * @new_class: new class code
Tejun Heofe309112007-05-15 03:28:15 +09003974 * @readid_flags: read ID flags
3975 *
3976 * Re-read IDENTIFY page, make sure @dev is still attached to the
3977 * port and reconfigure it according to the new IDENTIFY page.
3978 *
3979 * LOCKING:
3980 * Kernel thread context (may sleep)
3981 *
3982 * RETURNS:
3983 * 0 on success, negative errno otherwise
3984 */
Tejun Heo422c9da2007-09-23 13:14:12 +09003985int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3986 unsigned int readid_flags)
Tejun Heofe309112007-05-15 03:28:15 +09003987{
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09003988 u64 n_sectors = dev->n_sectors;
Tejun Heofe309112007-05-15 03:28:15 +09003989 int rc;
3990
3991 if (!ata_dev_enabled(dev))
3992 return -ENODEV;
3993
Tejun Heo422c9da2007-09-23 13:14:12 +09003994 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3995 if (ata_class_enabled(new_class) &&
3996 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
3997 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
3998 dev->class, new_class);
3999 rc = -ENODEV;
4000 goto fail;
4001 }
4002
Tejun Heofe309112007-05-15 03:28:15 +09004003 /* re-read ID */
4004 rc = ata_dev_reread_id(dev, readid_flags);
4005 if (rc)
4006 goto fail;
Tejun Heo623a3122006-03-05 17:55:58 +09004007
4008 /* configure device according to the new ID */
Tejun Heoefdaedc2006-11-01 18:38:52 +09004009 rc = ata_dev_configure(dev);
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004010 if (rc)
4011 goto fail;
4012
4013 /* verify n_sectors hasn't changed */
Tejun Heob54eebd2007-08-17 18:46:51 +09004014 if (dev->class == ATA_DEV_ATA && n_sectors &&
4015 dev->n_sectors != n_sectors) {
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004016 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4017 "%llu != %llu\n",
4018 (unsigned long long)n_sectors,
4019 (unsigned long long)dev->n_sectors);
Tejun Heo8270bec2007-08-16 03:02:22 +09004020
4021 /* restore original n_sectors */
4022 dev->n_sectors = n_sectors;
4023
Tejun Heo6ddcd3b2007-05-15 03:28:15 +09004024 rc = -ENODEV;
4025 goto fail;
4026 }
4027
4028 return 0;
Tejun Heo623a3122006-03-05 17:55:58 +09004029
4030 fail:
Tejun Heof15a1da2006-05-15 20:57:56 +09004031 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
Tejun Heo623a3122006-03-05 17:55:58 +09004032 return rc;
4033}
4034
Alan Cox6919a0a2006-10-27 19:08:46 -07004035struct ata_blacklist_entry {
4036 const char *model_num;
4037 const char *model_rev;
4038 unsigned long horkage;
4039};
4040
4041static const struct ata_blacklist_entry ata_device_blacklist [] = {
4042 /* Devices with DMA related problems under Linux */
4043 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4044 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4045 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4046 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4047 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4048 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4049 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4050 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4051 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4052 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4053 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4054 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4055 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4056 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4057 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4058 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4059 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4060 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4061 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4062 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4063 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4064 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4065 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4066 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4067 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4068 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004069 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4070 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004071 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
Dave Jones39f19882007-05-21 14:31:03 -04004072 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
Tejun Heo3af9a772007-09-23 13:19:54 +09004073 /* Odd clown on sil3726/4726 PMPs */
4074 { "Config Disk", NULL, ATA_HORKAGE_NODMA |
4075 ATA_HORKAGE_SKIP_PM },
Alan Cox6919a0a2006-10-27 19:08:46 -07004076
Albert Lee18d6e9d2007-04-02 11:34:15 +08004077 /* Weird ATAPI devices */
Tejun Heo40a1d532007-06-27 02:49:38 +09004078 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
Albert Lee18d6e9d2007-04-02 11:34:15 +08004079
Alan Cox6919a0a2006-10-27 19:08:46 -07004080 /* Devices we expect to fail diagnostics */
4081
4082 /* Devices where NCQ should be avoided */
4083 /* NCQ is slow */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004084 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
Tejun Heo459ad682007-12-07 12:46:23 +09004085 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
Tejun Heo09125ea2007-02-28 15:21:23 +09004086 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4087 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
Paul Rolland7acfaf32007-03-26 21:43:44 -08004088 /* NCQ is broken */
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004089 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
Alan Cox0e3dbc02007-09-20 15:22:47 +01004090 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
David Milburn0b0a43e2007-09-28 14:29:06 -05004091 { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ },
4092 { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ },
Paolo Ornatida6f0ec2007-10-04 11:06:56 +09004093 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
Tejun Heoe41bd3e2007-12-09 19:45:39 +09004094 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004095
Robert Hancock36e337d2007-04-02 22:05:29 -06004096 /* Blacklist entries taken from Silicon Image 3124/3132
4097 Windows driver .inf file - also several Linux problem reports */
4098 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4099 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4100 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
Alan Cox6919a0a2006-10-27 19:08:46 -07004101
Tejun Heo16c55b02007-08-29 11:58:33 +09004102 /* devices which puke on READ_NATIVE_MAX */
4103 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4104 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4105 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4106 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
Alan Cox6919a0a2006-10-27 19:08:46 -07004107
Alan Cox93328e12007-09-29 04:06:48 -04004108 /* Devices which report 1 sector over size HPA */
4109 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4110 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4111
Alan Cox6bbfd532007-11-05 22:58:58 +00004112 /* Devices which get the IVB wrong */
4113 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4114 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
Peter Missele9f33402007-11-27 18:04:42 +01004115 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4116 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4117 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
Alan Cox6bbfd532007-11-05 22:58:58 +00004118
Alan Cox6919a0a2006-10-27 19:08:46 -07004119 /* End Marker */
4120 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004121};
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05004122
Adrian Bunk741b7762007-10-24 18:23:06 +02004123static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004124{
4125 const char *p;
4126 int len;
4127
4128 /*
4129 * check for trailing wildcard: *\0
4130 */
4131 p = strchr(patt, wildchar);
4132 if (p && ((*(p + 1)) == 0))
4133 len = p - patt;
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004134 else {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004135 len = strlen(name);
Andrew Paprocki317b50b2007-10-15 15:43:12 -04004136 if (!len) {
4137 if (!*patt)
4138 return 0;
4139 return -1;
4140 }
4141 }
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004142
4143 return strncmp(patt, name, len);
4144}
4145
Tejun Heo75683fe2007-07-05 13:31:27 +09004146static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004147{
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004148 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4149 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
Alan Cox6919a0a2006-10-27 19:08:46 -07004150 const struct ata_blacklist_entry *ad = ata_device_blacklist;
Albert Lee3a778272006-06-22 13:00:25 +08004151
Tejun Heo8bfa79f2007-01-02 20:19:40 +09004152 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4153 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004154
Alan Cox6919a0a2006-10-27 19:08:46 -07004155 while (ad->model_num) {
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004156 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
Alan Cox6919a0a2006-10-27 19:08:46 -07004157 if (ad->model_rev == NULL)
4158 return ad->horkage;
Jeff Garzik539cc7c2007-09-20 16:31:47 -04004159 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
Alan Cox6919a0a2006-10-27 19:08:46 -07004160 return ad->horkage;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004161 }
Alan Cox6919a0a2006-10-27 19:08:46 -07004162 ad++;
Alan Coxf4b15fe2006-03-22 15:54:04 +00004163 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004164 return 0;
4165}
4166
Alan Cox6919a0a2006-10-27 19:08:46 -07004167static int ata_dma_blacklisted(const struct ata_device *dev)
4168{
4169 /* We don't support polling DMA.
4170 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4171 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4172 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004173 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
Alan Cox6919a0a2006-10-27 19:08:46 -07004174 (dev->flags & ATA_DFLAG_CDB_INTR))
4175 return 1;
Tejun Heo75683fe2007-07-05 13:31:27 +09004176 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
Alan Cox6919a0a2006-10-27 19:08:46 -07004177}
4178
Tejun Heoa6d5a512006-03-06 04:31:57 +09004179/**
Alan Cox6bbfd532007-11-05 22:58:58 +00004180 * ata_is_40wire - check drive side detection
4181 * @dev: device
4182 *
4183 * Perform drive side detection decoding, allowing for device vendors
4184 * who can't follow the documentation.
4185 */
4186
4187static int ata_is_40wire(struct ata_device *dev)
4188{
4189 if (dev->horkage & ATA_HORKAGE_IVB)
4190 return ata_drive_40wire_relaxed(dev->id);
4191 return ata_drive_40wire(dev->id);
4192}
4193
4194/**
Tejun Heoa6d5a512006-03-06 04:31:57 +09004195 * ata_dev_xfermask - Compute supported xfermask of the given device
Tejun Heoa6d5a512006-03-06 04:31:57 +09004196 * @dev: Device to compute xfermask for
4197 *
Tejun Heoacf356b2006-03-24 14:07:50 +09004198 * Compute supported xfermask of @dev and store it in
4199 * dev->*_mask. This function is responsible for applying all
4200 * known limits including host controller limits, device
4201 * blacklist, etc...
Tejun Heoa6d5a512006-03-06 04:31:57 +09004202 *
4203 * LOCKING:
4204 * None.
Tejun Heoa6d5a512006-03-06 04:31:57 +09004205 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004206static void ata_dev_xfermask(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004207{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004208 struct ata_link *link = dev->link;
4209 struct ata_port *ap = link->ap;
Jeff Garzikcca39742006-08-24 03:19:22 -04004210 struct ata_host *host = ap->host;
Tejun Heoa6d5a512006-03-06 04:31:57 +09004211 unsigned long xfer_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004212
Tejun Heo37deecb2006-08-10 16:59:07 +09004213 /* controller modes available */
Tejun Heo565083e2006-04-02 17:54:47 +09004214 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4215 ap->mwdma_mask, ap->udma_mask);
4216
Robert Hancock8343f882007-03-06 02:37:51 -08004217 /* drive modes available */
Tejun Heo37deecb2006-08-10 16:59:07 +09004218 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4219 dev->mwdma_mask, dev->udma_mask);
4220 xfer_mask &= ata_id_xfermask(dev->id);
Tejun Heo565083e2006-04-02 17:54:47 +09004221
Alan Coxb352e572006-08-10 18:52:12 +01004222 /*
4223 * CFA Advanced TrueIDE timings are not allowed on a shared
4224 * cable
4225 */
4226 if (ata_dev_pair(dev)) {
4227 /* No PIO5 or PIO6 */
4228 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4229 /* No MWDMA3 or MWDMA 4 */
4230 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4231 }
4232
Tejun Heo37deecb2006-08-10 16:59:07 +09004233 if (ata_dma_blacklisted(dev)) {
4234 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
Tejun Heof15a1da2006-05-15 20:57:56 +09004235 ata_dev_printk(dev, KERN_WARNING,
4236 "device is on DMA blacklist, disabling DMA\n");
Tejun Heo37deecb2006-08-10 16:59:07 +09004237 }
Tejun Heoa6d5a512006-03-06 04:31:57 +09004238
Petr Vandrovec14d66ab2007-03-08 10:12:12 +01004239 if ((host->flags & ATA_HOST_SIMPLEX) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004240 host->simplex_claimed && host->simplex_claimed != ap) {
Tejun Heo37deecb2006-08-10 16:59:07 +09004241 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4242 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4243 "other device, disabling DMA\n");
Alan Cox5444a6f2006-03-27 18:58:20 +01004244 }
Tejun Heo565083e2006-04-02 17:54:47 +09004245
Jeff Garzike4246752007-03-09 09:56:46 -05004246 if (ap->flags & ATA_FLAG_NO_IORDY)
4247 xfer_mask &= ata_pio_mask_no_iordy(dev);
4248
Alan Cox5444a6f2006-03-27 18:58:20 +01004249 if (ap->ops->mode_filter)
Alan Coxa76b62c2007-03-09 09:34:07 -05004250 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
Alan Cox5444a6f2006-03-27 18:58:20 +01004251
Robert Hancock8343f882007-03-06 02:37:51 -08004252 /* Apply cable rule here. Don't apply it early because when
4253 * we handle hot plug the cable type can itself change.
4254 * Check this last so that we know if the transfer rate was
4255 * solely limited by the cable.
4256 * Unknown or 80 wire cables reported host side are checked
4257 * drive side as well. Cases where we know a 40wire cable
4258 * is used safely for 80 are not checked here.
4259 */
4260 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4261 /* UDMA/44 or higher would be available */
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004262 if ((ap->cbl == ATA_CBL_PATA40) ||
Alan Cox6bbfd532007-11-05 22:58:58 +00004263 (ata_is_40wire(dev) &&
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004264 (ap->cbl == ATA_CBL_PATA_UNK ||
4265 ap->cbl == ATA_CBL_PATA80))) {
4266 ata_dev_printk(dev, KERN_WARNING,
Robert Hancock8343f882007-03-06 02:37:51 -08004267 "limited to UDMA/33 due to 40-wire cable\n");
4268 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4269 }
4270
Tejun Heo565083e2006-04-02 17:54:47 +09004271 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4272 &dev->mwdma_mask, &dev->udma_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004273}
4274
Linus Torvalds1da177e2005-04-16 15:20:36 -07004275/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004276 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
Linus Torvalds1da177e2005-04-16 15:20:36 -07004277 * @dev: Device to which command will be sent
4278 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004279 * Issue SET FEATURES - XFER MODE command to device @dev
4280 * on port @ap.
4281 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004282 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004283 * PCI/etc. bus probe sem.
Tejun Heo83206a22006-03-24 15:25:31 +09004284 *
4285 * RETURNS:
4286 * 0 on success, AC_ERR_* mask otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004287 */
4288
Tejun Heo3373efd2006-05-15 20:57:53 +09004289static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004290{
Tejun Heoa0123702005-12-13 14:49:31 +09004291 struct ata_taskfile tf;
Tejun Heo83206a22006-03-24 15:25:31 +09004292 unsigned int err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004293
4294 /* set up set-features taskfile */
4295 DPRINTK("set features - xfer mode\n");
4296
Tejun Heo464cf172007-05-27 15:10:40 +02004297 /* Some controllers and ATAPI devices show flaky interrupt
4298 * behavior after setting xfer mode. Use polling instead.
4299 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004300 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004301 tf.command = ATA_CMD_SET_FEATURES;
4302 tf.feature = SETFEATURES_XFER;
Tejun Heo464cf172007-05-27 15:10:40 +02004303 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
Tejun Heoa0123702005-12-13 14:49:31 +09004304 tf.protocol = ATA_PROT_NODATA;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004305 /* If we are using IORDY we must send the mode setting command */
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004306 if (ata_pio_need_iordy(dev))
4307 tf.nsect = dev->xfer_mode;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004308 /* If the device has IORDY and the controller does not - turn it off */
4309 else if (ata_id_has_iordy(dev->id))
Jeff Garzik11b7bec2007-11-23 21:12:14 -05004310 tf.nsect = 0x01;
Alan Coxb9f8ab22007-11-19 14:33:11 +00004311 else /* In the ancient relic department - skip all of this */
4312 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004313
Tejun Heo2b789102007-10-09 15:05:44 +09004314 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004315
Tejun Heo83206a22006-03-24 15:25:31 +09004316 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4317 return err_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004318}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319/**
Jeff Garzik218f3d32007-10-25 00:33:27 -04004320 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004321 * @dev: Device to which command will be sent
4322 * @enable: Whether to enable or disable the feature
Jeff Garzik218f3d32007-10-25 00:33:27 -04004323 * @feature: The sector count represents the feature to set
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004324 *
4325 * Issue SET FEATURES - SATA FEATURES command to device @dev
Jeff Garzik218f3d32007-10-25 00:33:27 -04004326 * on port @ap with sector count
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004327 *
4328 * LOCKING:
4329 * PCI/etc. bus probe sem.
4330 *
4331 * RETURNS:
4332 * 0 on success, AC_ERR_* mask otherwise.
4333 */
Jeff Garzik218f3d32007-10-25 00:33:27 -04004334static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4335 u8 feature)
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004336{
4337 struct ata_taskfile tf;
4338 unsigned int err_mask;
4339
4340 /* set up set-features taskfile */
4341 DPRINTK("set features - SATA features\n");
4342
4343 ata_tf_init(dev, &tf);
4344 tf.command = ATA_CMD_SET_FEATURES;
4345 tf.feature = enable;
4346 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4347 tf.protocol = ATA_PROT_NODATA;
Jeff Garzik218f3d32007-10-25 00:33:27 -04004348 tf.nsect = feature;
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004349
Tejun Heo2b789102007-10-09 15:05:44 +09004350 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -04004351
4352 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4353 return err_mask;
4354}
4355
4356/**
Albert Lee8bf62ece2005-05-12 15:29:42 -04004357 * ata_dev_init_params - Issue INIT DEV PARAMS command
Albert Lee8bf62ece2005-05-12 15:29:42 -04004358 * @dev: Device to which command will be sent
Randy Dunlape2a7f772006-05-18 10:50:18 -07004359 * @heads: Number of heads (taskfile parameter)
4360 * @sectors: Number of sectors (taskfile parameter)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004361 *
4362 * LOCKING:
Tejun Heo6aff8f12006-02-15 18:24:09 +09004363 * Kernel thread context (may sleep)
4364 *
4365 * RETURNS:
4366 * 0 on success, AC_ERR_* mask otherwise.
Albert Lee8bf62ece2005-05-12 15:29:42 -04004367 */
Tejun Heo3373efd2006-05-15 20:57:53 +09004368static unsigned int ata_dev_init_params(struct ata_device *dev,
4369 u16 heads, u16 sectors)
Albert Lee8bf62ece2005-05-12 15:29:42 -04004370{
Tejun Heoa0123702005-12-13 14:49:31 +09004371 struct ata_taskfile tf;
Tejun Heo6aff8f12006-02-15 18:24:09 +09004372 unsigned int err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004373
4374 /* Number of sectors per track 1-255. Number of heads 1-16 */
4375 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
Albert Lee00b6f5e2006-03-27 16:39:18 +08004376 return AC_ERR_INVALID;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004377
4378 /* set up init dev params taskfile */
4379 DPRINTK("init dev params \n");
4380
Tejun Heo3373efd2006-05-15 20:57:53 +09004381 ata_tf_init(dev, &tf);
Tejun Heoa0123702005-12-13 14:49:31 +09004382 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4383 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4384 tf.protocol = ATA_PROT_NODATA;
4385 tf.nsect = sectors;
4386 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
Albert Lee8bf62ece2005-05-12 15:29:42 -04004387
Tejun Heo2b789102007-10-09 15:05:44 +09004388 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
Alan Cox18b24662007-08-08 14:28:49 +01004389 /* A clean abort indicates an original or just out of spec drive
4390 and we should continue as we issue the setup based on the
4391 drive reported working geometry */
4392 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4393 err_mask = 0;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004394
Tejun Heo6aff8f12006-02-15 18:24:09 +09004395 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4396 return err_mask;
Albert Lee8bf62ece2005-05-12 15:29:42 -04004397}
4398
4399/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004400 * ata_sg_clean - Unmap DMA memory associated with command
4401 * @qc: Command containing DMA memory to be released
4402 *
4403 * Unmap all mapped DMA memory associated with this command.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004404 *
4405 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004406 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004407 */
Tejun Heo70e6ad02006-11-14 22:47:10 +09004408void ata_sg_clean(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004409{
4410 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004411 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004412 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004413 void *pad_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004414
Tejun Heoa46314742006-02-11 19:11:13 +09004415 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
4416 WARN_ON(sg == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004417
4418 if (qc->flags & ATA_QCFLAG_SINGLE)
Jeff Garzikf1318832006-02-20 16:55:56 -05004419 WARN_ON(qc->n_elem > 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004420
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05004421 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004422
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004423 /* if we padded the buffer out to 32-bit bound, and data
4424 * xfer direction is from-device, we must copy from the
4425 * pad buffer back into the supplied buffer
4426 */
4427 if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
4428 pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4429
4430 if (qc->flags & ATA_QCFLAG_SG) {
Jeff Garzike1410f22005-11-14 14:06:26 -05004431 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06004432 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004433 /* restore last sg */
Jens Axboe87260212007-10-16 11:14:12 +02004434 sg_last(sg, qc->orig_n_elem)->length += qc->pad_len;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004435 if (pad_buf) {
4436 struct scatterlist *psg = &qc->pad_sgent;
Jens Axboe45711f12007-10-22 21:19:53 +02004437 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004438 memcpy(addr + psg->offset, pad_buf, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05004439 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004440 }
4441 } else {
Tejun Heo2e242fa2006-02-20 23:48:38 +09004442 if (qc->n_elem)
Brian King2f1f6102006-03-23 17:30:15 -06004443 dma_unmap_single(ap->dev,
Jeff Garzike1410f22005-11-14 14:06:26 -05004444 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
4445 dir);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004446 /* restore sg */
4447 sg->length += qc->pad_len;
4448 if (pad_buf)
4449 memcpy(qc->buf_virt + sg->length - qc->pad_len,
4450 pad_buf, qc->pad_len);
4451 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004452
4453 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004454 qc->__sg = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004455}
4456
4457/**
4458 * ata_fill_sg - Fill PCI IDE PRD table
4459 * @qc: Metadata associated with taskfile to be transferred
4460 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004461 * Fill PCI IDE PRD (scatter-gather) table with segments
4462 * associated with the current disk command.
4463 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004464 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004465 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004466 *
4467 */
4468static void ata_fill_sg(struct ata_queued_cmd *qc)
4469{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004470 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004471 struct scatterlist *sg;
4472 unsigned int idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004473
Tejun Heoa46314742006-02-11 19:11:13 +09004474 WARN_ON(qc->__sg == NULL);
Jeff Garzikf1318832006-02-20 16:55:56 -05004475 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004476
4477 idx = 0;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004478 ata_for_each_sg(sg, qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004479 u32 addr, offset;
4480 u32 sg_len, len;
4481
4482 /* determine if physical DMA addr spans 64K boundary.
4483 * Note h/w doesn't support 64-bit, so we unconditionally
4484 * truncate dma_addr_t to u32.
4485 */
4486 addr = (u32) sg_dma_address(sg);
4487 sg_len = sg_dma_len(sg);
4488
4489 while (sg_len) {
4490 offset = addr & 0xffff;
4491 len = sg_len;
4492 if ((offset + sg_len) > 0x10000)
4493 len = 0x10000 - offset;
4494
4495 ap->prd[idx].addr = cpu_to_le32(addr);
4496 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
4497 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
4498
4499 idx++;
4500 sg_len -= len;
4501 addr += len;
4502 }
4503 }
4504
4505 if (idx)
4506 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4507}
Tejun Heob9a41972007-06-27 02:48:43 +09004508
Linus Torvalds1da177e2005-04-16 15:20:36 -07004509/**
Alan Coxd26fc952007-07-06 19:13:52 -04004510 * ata_fill_sg_dumb - Fill PCI IDE PRD table
4511 * @qc: Metadata associated with taskfile to be transferred
4512 *
4513 * Fill PCI IDE PRD (scatter-gather) table with segments
4514 * associated with the current disk command. Perform the fill
4515 * so that we avoid writing any length 64K records for
4516 * controllers that don't follow the spec.
4517 *
4518 * LOCKING:
4519 * spin_lock_irqsave(host lock)
4520 *
4521 */
4522static void ata_fill_sg_dumb(struct ata_queued_cmd *qc)
4523{
4524 struct ata_port *ap = qc->ap;
4525 struct scatterlist *sg;
4526 unsigned int idx;
4527
4528 WARN_ON(qc->__sg == NULL);
4529 WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
4530
4531 idx = 0;
4532 ata_for_each_sg(sg, qc) {
4533 u32 addr, offset;
4534 u32 sg_len, len, blen;
4535
Jeff Garzik2dcb4072007-10-19 06:42:56 -04004536 /* determine if physical DMA addr spans 64K boundary.
Alan Coxd26fc952007-07-06 19:13:52 -04004537 * Note h/w doesn't support 64-bit, so we unconditionally
4538 * truncate dma_addr_t to u32.
4539 */
4540 addr = (u32) sg_dma_address(sg);
4541 sg_len = sg_dma_len(sg);
4542
4543 while (sg_len) {
4544 offset = addr & 0xffff;
4545 len = sg_len;
4546 if ((offset + sg_len) > 0x10000)
4547 len = 0x10000 - offset;
4548
4549 blen = len & 0xffff;
4550 ap->prd[idx].addr = cpu_to_le32(addr);
4551 if (blen == 0) {
4552 /* Some PATA chipsets like the CS5530 can't
4553 cope with 0x0000 meaning 64K as the spec says */
4554 ap->prd[idx].flags_len = cpu_to_le32(0x8000);
4555 blen = 0x8000;
4556 ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000);
4557 }
4558 ap->prd[idx].flags_len = cpu_to_le32(blen);
4559 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
4560
4561 idx++;
4562 sg_len -= len;
4563 addr += len;
4564 }
4565 }
4566
4567 if (idx)
4568 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
4569}
4570
4571/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004572 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
4573 * @qc: Metadata associated with taskfile to check
4574 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004575 * Allow low-level driver to filter ATA PACKET commands, returning
4576 * a status indicating whether or not it is OK to use DMA for the
4577 * supplied PACKET command.
4578 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004579 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004580 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004581 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004582 * RETURNS: 0 when ATAPI DMA can be used
4583 * nonzero otherwise
4584 */
4585int ata_check_atapi_dma(struct ata_queued_cmd *qc)
4586{
4587 struct ata_port *ap = qc->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004588
Tejun Heob9a41972007-06-27 02:48:43 +09004589 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4590 * few ATAPI devices choke on such DMA requests.
4591 */
4592 if (unlikely(qc->nbytes & 15))
4593 return 1;
Albert Lee6f23a312007-04-02 11:39:25 +08004594
Linus Torvalds1da177e2005-04-16 15:20:36 -07004595 if (ap->ops->check_atapi_dma)
Tejun Heob9a41972007-06-27 02:48:43 +09004596 return ap->ops->check_atapi_dma(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004597
Tejun Heob9a41972007-06-27 02:48:43 +09004598 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004599}
Tejun Heob9a41972007-06-27 02:48:43 +09004600
Linus Torvalds1da177e2005-04-16 15:20:36 -07004601/**
Tejun Heo140b5e52007-12-12 12:21:52 +09004602 * atapi_qc_may_overflow - Check whether data transfer may overflow
4603 * @qc: ATA command in question
4604 *
4605 * ATAPI commands which transfer variable length data to host
4606 * might overflow due to application error or hardare bug. This
4607 * function checks whether overflow should be drained and ignored
4608 * for @qc.
4609 *
4610 * LOCKING:
4611 * None.
4612 *
4613 * RETURNS:
4614 * 1 if @qc may overflow; otherwise, 0.
4615 */
4616static int atapi_qc_may_overflow(struct ata_queued_cmd *qc)
4617{
4618 if (qc->tf.protocol != ATA_PROT_ATAPI &&
4619 qc->tf.protocol != ATA_PROT_ATAPI_DMA)
4620 return 0;
4621
4622 if (qc->tf.flags & ATA_TFLAG_WRITE)
4623 return 0;
4624
4625 switch (qc->cdb[0]) {
4626 case READ_10:
4627 case READ_12:
4628 case WRITE_10:
4629 case WRITE_12:
4630 case GPCMD_READ_CD:
4631 case GPCMD_READ_CD_MSF:
4632 return 0;
4633 }
4634
4635 return 1;
4636}
4637
4638/**
Tejun Heo31cc23b2007-09-23 13:14:12 +09004639 * ata_std_qc_defer - Check whether a qc needs to be deferred
4640 * @qc: ATA command in question
4641 *
4642 * Non-NCQ commands cannot run with any other command, NCQ or
4643 * not. As upper layer only knows the queue depth, we are
4644 * responsible for maintaining exclusion. This function checks
4645 * whether a new command @qc can be issued.
4646 *
4647 * LOCKING:
4648 * spin_lock_irqsave(host lock)
4649 *
4650 * RETURNS:
4651 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4652 */
4653int ata_std_qc_defer(struct ata_queued_cmd *qc)
4654{
4655 struct ata_link *link = qc->dev->link;
4656
4657 if (qc->tf.protocol == ATA_PROT_NCQ) {
4658 if (!ata_tag_valid(link->active_tag))
4659 return 0;
4660 } else {
4661 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4662 return 0;
4663 }
4664
4665 return ATA_DEFER_LINK;
4666}
4667
4668/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07004669 * ata_qc_prep - Prepare taskfile for submission
4670 * @qc: Metadata associated with taskfile to be prepared
4671 *
Jeff Garzik780a87f2005-05-30 15:41:05 -04004672 * Prepare ATA taskfile for submission.
4673 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004674 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004675 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004676 */
4677void ata_qc_prep(struct ata_queued_cmd *qc)
4678{
4679 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4680 return;
4681
4682 ata_fill_sg(qc);
4683}
4684
Alan Coxd26fc952007-07-06 19:13:52 -04004685/**
4686 * ata_dumb_qc_prep - Prepare taskfile for submission
4687 * @qc: Metadata associated with taskfile to be prepared
4688 *
4689 * Prepare ATA taskfile for submission.
4690 *
4691 * LOCKING:
4692 * spin_lock_irqsave(host lock)
4693 */
4694void ata_dumb_qc_prep(struct ata_queued_cmd *qc)
4695{
4696 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
4697 return;
4698
4699 ata_fill_sg_dumb(qc);
4700}
4701
Brian Kinge46834c2006-03-17 17:04:03 -06004702void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4703
Jeff Garzik0cba6322005-05-30 19:49:12 -04004704/**
4705 * ata_sg_init_one - Associate command with memory buffer
4706 * @qc: Command to be associated
4707 * @buf: Memory buffer
4708 * @buflen: Length of memory buffer, in bytes.
4709 *
4710 * Initialize the data-related elements of queued_cmd @qc
4711 * to point to a single memory buffer, @buf of byte length @buflen.
4712 *
4713 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004714 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004715 */
4716
Linus Torvalds1da177e2005-04-16 15:20:36 -07004717void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
4718{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004719 qc->flags |= ATA_QCFLAG_SINGLE;
4720
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004721 qc->__sg = &qc->sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004722 qc->n_elem = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004723 qc->orig_n_elem = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004724 qc->buf_virt = buf;
Brian King233277c2006-06-07 11:25:31 -05004725 qc->nbytes = buflen;
Jens Axboe87260212007-10-16 11:14:12 +02004726 qc->cursg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004727
Tejun Heo61c05962006-11-14 22:35:43 +09004728 sg_init_one(&qc->sgent, buf, buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004729}
4730
Jeff Garzik0cba6322005-05-30 19:49:12 -04004731/**
4732 * ata_sg_init - Associate command with scatter-gather table.
4733 * @qc: Command to be associated
4734 * @sg: Scatter-gather table.
4735 * @n_elem: Number of elements in s/g table.
4736 *
4737 * Initialize the data-related elements of queued_cmd @qc
4738 * to point to a scatter-gather table @sg, containing @n_elem
4739 * elements.
4740 *
4741 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004742 * spin_lock_irqsave(host lock)
Jeff Garzik0cba6322005-05-30 19:49:12 -04004743 */
4744
Linus Torvalds1da177e2005-04-16 15:20:36 -07004745void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4746 unsigned int n_elem)
4747{
4748 qc->flags |= ATA_QCFLAG_SG;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004749 qc->__sg = sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004750 qc->n_elem = n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004751 qc->orig_n_elem = n_elem;
Jens Axboe87260212007-10-16 11:14:12 +02004752 qc->cursg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004753}
4754
4755/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004756 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
4757 * @qc: Command with memory buffer to be mapped.
4758 *
4759 * DMA-map the memory buffer associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004760 *
4761 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004762 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004763 *
4764 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004765 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004766 */
4767
4768static int ata_sg_setup_one(struct ata_queued_cmd *qc)
4769{
4770 struct ata_port *ap = qc->ap;
4771 int dir = qc->dma_dir;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004772 struct scatterlist *sg = qc->__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004773 dma_addr_t dma_address;
Tejun Heo2e242fa2006-02-20 23:48:38 +09004774 int trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004775
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004776 /* we must lengthen transfers to end on a 32-bit boundary */
4777 qc->pad_len = sg->length & 3;
4778 if (qc->pad_len) {
4779 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4780 struct scatterlist *psg = &qc->pad_sgent;
4781
Tejun Heoa46314742006-02-11 19:11:13 +09004782 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004783
4784 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4785
4786 if (qc->tf.flags & ATA_TFLAG_WRITE)
4787 memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
4788 qc->pad_len);
4789
4790 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4791 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4792 /* trim sg */
4793 sg->length -= qc->pad_len;
Tejun Heo2e242fa2006-02-20 23:48:38 +09004794 if (sg->length == 0)
4795 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004796
4797 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
4798 sg->length, qc->pad_len);
4799 }
4800
Tejun Heo2e242fa2006-02-20 23:48:38 +09004801 if (trim_sg) {
4802 qc->n_elem--;
Jeff Garzike1410f22005-11-14 14:06:26 -05004803 goto skip_map;
4804 }
4805
Brian King2f1f6102006-03-23 17:30:15 -06004806 dma_address = dma_map_single(ap->dev, qc->buf_virt,
Albert Lee32529e02005-05-26 03:49:42 -04004807 sg->length, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05004808 if (dma_mapping_error(dma_address)) {
4809 /* restore sg */
4810 sg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004811 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05004812 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004813
4814 sg_dma_address(sg) = dma_address;
Albert Lee32529e02005-05-26 03:49:42 -04004815 sg_dma_len(sg) = sg->length;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004816
Tejun Heo2e242fa2006-02-20 23:48:38 +09004817skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004818 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
4819 qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
4820
4821 return 0;
4822}
4823
4824/**
Jeff Garzik0cba6322005-05-30 19:49:12 -04004825 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4826 * @qc: Command with scatter-gather table to be mapped.
4827 *
4828 * DMA-map the scatter-gather table associated with queued_cmd @qc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004829 *
4830 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04004831 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004832 *
4833 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04004834 * Zero on success, negative on error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004835 *
4836 */
4837
4838static int ata_sg_setup(struct ata_queued_cmd *qc)
4839{
4840 struct ata_port *ap = qc->ap;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004841 struct scatterlist *sg = qc->__sg;
Jens Axboe87260212007-10-16 11:14:12 +02004842 struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem);
Jeff Garzike1410f22005-11-14 14:06:26 -05004843 int n_elem, pre_n_elem, dir, trim_sg = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004844
Tejun Heo44877b42007-02-21 01:06:51 +09004845 VPRINTK("ENTER, ata%u\n", ap->print_id);
Tejun Heoa46314742006-02-11 19:11:13 +09004846 WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004847
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004848 /* we must lengthen transfers to end on a 32-bit boundary */
4849 qc->pad_len = lsg->length & 3;
4850 if (qc->pad_len) {
4851 void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
4852 struct scatterlist *psg = &qc->pad_sgent;
4853 unsigned int offset;
4854
Tejun Heoa46314742006-02-11 19:11:13 +09004855 WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004856
4857 memset(pad_buf, 0, ATA_DMA_PAD_SZ);
4858
4859 /*
4860 * psg->page/offset are used to copy to-be-written
4861 * data in this function or read data in ata_sg_clean.
4862 */
4863 offset = lsg->offset + lsg->length - qc->pad_len;
Anton Blanchardacd054a2007-10-26 13:59:44 +02004864 sg_init_table(psg, 1);
Jens Axboe642f1492007-10-24 11:20:47 +02004865 sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT),
4866 qc->pad_len, offset_in_page(offset));
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004867
4868 if (qc->tf.flags & ATA_TFLAG_WRITE) {
Jens Axboe45711f12007-10-22 21:19:53 +02004869 void *addr = kmap_atomic(sg_page(psg), KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004870 memcpy(pad_buf, addr + psg->offset, qc->pad_len);
Mark Lorddfa15982005-12-12 23:19:28 -05004871 kunmap_atomic(addr, KM_IRQ0);
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004872 }
4873
4874 sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
4875 sg_dma_len(psg) = ATA_DMA_PAD_SZ;
4876 /* trim last sg */
4877 lsg->length -= qc->pad_len;
Jeff Garzike1410f22005-11-14 14:06:26 -05004878 if (lsg->length == 0)
4879 trim_sg = 1;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04004880
4881 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
4882 qc->n_elem - 1, lsg->length, qc->pad_len);
4883 }
4884
Jeff Garzike1410f22005-11-14 14:06:26 -05004885 pre_n_elem = qc->n_elem;
4886 if (trim_sg && pre_n_elem)
4887 pre_n_elem--;
4888
4889 if (!pre_n_elem) {
4890 n_elem = 0;
4891 goto skip_map;
4892 }
4893
Linus Torvalds1da177e2005-04-16 15:20:36 -07004894 dir = qc->dma_dir;
Brian King2f1f6102006-03-23 17:30:15 -06004895 n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
Tejun Heo537a95d2005-11-05 14:29:01 -05004896 if (n_elem < 1) {
4897 /* restore last sg */
4898 lsg->length += qc->pad_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004899 return -1;
Tejun Heo537a95d2005-11-05 14:29:01 -05004900 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004901
4902 DPRINTK("%d sg elements mapped\n", n_elem);
4903
Jeff Garzike1410f22005-11-14 14:06:26 -05004904skip_map:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004905 qc->n_elem = n_elem;
4906
4907 return 0;
4908}
4909
4910/**
Randy Dunlapc893a3a2006-01-28 13:15:32 -05004911 * swap_buf_le16 - swap halves of 16-bit words in place
Edward Falk0baab862005-06-02 18:17:13 -04004912 * @buf: Buffer to swap
4913 * @buf_words: Number of 16-bit words in buffer.
4914 *
4915 * Swap halves of 16-bit words if needed to convert from
4916 * little-endian byte order to native cpu byte order, or
4917 * vice-versa.
4918 *
4919 * LOCKING:
Randy Dunlap6f0ef4f2005-10-25 01:44:30 -04004920 * Inherited from caller.
Edward Falk0baab862005-06-02 18:17:13 -04004921 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004922void swap_buf_le16(u16 *buf, unsigned int buf_words)
4923{
4924#ifdef __BIG_ENDIAN
4925 unsigned int i;
4926
4927 for (i = 0; i < buf_words; i++)
4928 buf[i] = le16_to_cpu(buf[i]);
4929#endif /* __BIG_ENDIAN */
4930}
4931
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004932/**
Tejun Heo0d5ff562007-02-01 15:06:36 +09004933 * ata_data_xfer - Transfer data by PIO
Alan Coxa6b2c5d2006-05-22 16:59:59 +01004934 * @adev: device to target
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004935 * @buf: data buffer
4936 * @buflen: buffer length
Jeff Garzik344baba2005-09-07 01:15:17 -04004937 * @write_data: read/write
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004938 *
4939 * Transfer data from/to the device data register by PIO.
4940 *
4941 * LOCKING:
4942 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004943 */
Tejun Heo0d5ff562007-02-01 15:06:36 +09004944void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
4945 unsigned int buflen, int write_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004946{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09004947 struct ata_port *ap = adev->link->ap;
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004948 unsigned int words = buflen >> 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004949
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004950 /* Transfer multiple of 2 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004951 if (write_data)
Tejun Heo0d5ff562007-02-01 15:06:36 +09004952 iowrite16_rep(ap->ioaddr.data_addr, buf, words);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004953 else
Tejun Heo0d5ff562007-02-01 15:06:36 +09004954 ioread16_rep(ap->ioaddr.data_addr, buf, words);
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004955
4956 /* Transfer trailing 1 byte, if any. */
4957 if (unlikely(buflen & 0x01)) {
4958 u16 align_buf[1] = { 0 };
4959 unsigned char *trailing_buf = buf + buflen - 1;
4960
4961 if (write_data) {
4962 memcpy(align_buf, trailing_buf, 1);
Tejun Heo0d5ff562007-02-01 15:06:36 +09004963 iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004964 } else {
Tejun Heo0d5ff562007-02-01 15:06:36 +09004965 align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr));
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004966 memcpy(trailing_buf, align_buf, 1);
4967 }
4968 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004969}
4970
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004971/**
Tejun Heo0d5ff562007-02-01 15:06:36 +09004972 * ata_data_xfer_noirq - Transfer data by PIO
Alan Cox75e99582006-05-24 14:14:41 +01004973 * @adev: device to target
4974 * @buf: data buffer
4975 * @buflen: buffer length
4976 * @write_data: read/write
4977 *
Tejun Heo88574552006-06-25 20:00:35 +09004978 * Transfer data from/to the device data register by PIO. Do the
Alan Cox75e99582006-05-24 14:14:41 +01004979 * transfer with interrupts disabled.
4980 *
4981 * LOCKING:
4982 * Inherited from caller.
4983 */
Tejun Heo0d5ff562007-02-01 15:06:36 +09004984void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
4985 unsigned int buflen, int write_data)
Alan Cox75e99582006-05-24 14:14:41 +01004986{
4987 unsigned long flags;
4988 local_irq_save(flags);
Tejun Heo0d5ff562007-02-01 15:06:36 +09004989 ata_data_xfer(adev, buf, buflen, write_data);
Alan Cox75e99582006-05-24 14:14:41 +01004990 local_irq_restore(flags);
4991}
4992
4993
4994/**
Mark Lord5a5dbd12007-03-16 10:22:26 -04004995 * ata_pio_sector - Transfer a sector of data.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004996 * @qc: Command on going
4997 *
Mark Lord5a5dbd12007-03-16 10:22:26 -04004998 * Transfer qc->sect_size bytes of data from/to the ATA device.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08004999 *
5000 * LOCKING:
5001 * Inherited from caller.
5002 */
5003
Linus Torvalds1da177e2005-04-16 15:20:36 -07005004static void ata_pio_sector(struct ata_queued_cmd *qc)
5005{
5006 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005007 struct ata_port *ap = qc->ap;
5008 struct page *page;
5009 unsigned int offset;
5010 unsigned char *buf;
5011
Mark Lord5a5dbd12007-03-16 10:22:26 -04005012 if (qc->curbytes == qc->nbytes - qc->sect_size)
Albert Lee14be71f2005-09-27 17:36:35 +08005013 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005014
Jens Axboe45711f12007-10-22 21:19:53 +02005015 page = sg_page(qc->cursg);
Jens Axboe87260212007-10-16 11:14:12 +02005016 offset = qc->cursg->offset + qc->cursg_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005017
5018 /* get the current page and offset */
5019 page = nth_page(page, (offset >> PAGE_SHIFT));
5020 offset %= PAGE_SIZE;
5021
Albert Lee7282aa42005-10-09 09:46:07 -04005022 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5023
Albert Lee91b8b312005-10-09 09:48:44 -04005024 if (PageHighMem(page)) {
5025 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04005026
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005027 /* FIXME: use a bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04005028 local_irq_save(flags);
5029 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04005030
Albert Lee91b8b312005-10-09 09:48:44 -04005031 /* do the actual data transfer */
Mark Lord5a5dbd12007-03-16 10:22:26 -04005032 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04005033
5034 kunmap_atomic(buf, KM_IRQ0);
5035 local_irq_restore(flags);
5036 } else {
5037 buf = page_address(page);
Mark Lord5a5dbd12007-03-16 10:22:26 -04005038 ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04005039 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005040
Mark Lord5a5dbd12007-03-16 10:22:26 -04005041 qc->curbytes += qc->sect_size;
5042 qc->cursg_ofs += qc->sect_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005043
Jens Axboe87260212007-10-16 11:14:12 +02005044 if (qc->cursg_ofs == qc->cursg->length) {
5045 qc->cursg = sg_next(qc->cursg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005046 qc->cursg_ofs = 0;
5047 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005048}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005049
Albert Lee6ae4cfb2005-08-12 14:15:34 +08005050/**
Mark Lord5a5dbd12007-03-16 10:22:26 -04005051 * ata_pio_sectors - Transfer one or many sectors.
Albert Lee07f6f7d2005-11-01 19:33:20 +08005052 * @qc: Command on going
5053 *
Mark Lord5a5dbd12007-03-16 10:22:26 -04005054 * Transfer one or many sectors of data from/to the
Albert Lee07f6f7d2005-11-01 19:33:20 +08005055 * ATA device for the DRQ request.
5056 *
5057 * LOCKING:
5058 * Inherited from caller.
5059 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005060
Albert Lee07f6f7d2005-11-01 19:33:20 +08005061static void ata_pio_sectors(struct ata_queued_cmd *qc)
5062{
5063 if (is_multi_taskfile(&qc->tf)) {
5064 /* READ/WRITE MULTIPLE */
5065 unsigned int nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005066
Jeff Garzik587005d2006-02-11 18:17:32 -05005067 WARN_ON(qc->dev->multi_count == 0);
Albert Lee07f6f7d2005-11-01 19:33:20 +08005068
Mark Lord5a5dbd12007-03-16 10:22:26 -04005069 nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size,
Tejun Heo726f0782007-01-03 17:30:39 +09005070 qc->dev->multi_count);
Albert Lee07f6f7d2005-11-01 19:33:20 +08005071 while (nsect--)
5072 ata_pio_sector(qc);
5073 } else
5074 ata_pio_sector(qc);
Albert Lee4cc980b2007-08-15 03:19:45 -04005075
5076 ata_altstatus(qc->ap); /* flush */
Albert Lee07f6f7d2005-11-01 19:33:20 +08005077}
5078
5079/**
Albert Leec71c1852005-10-04 06:03:45 -04005080 * atapi_send_cdb - Write CDB bytes to hardware
5081 * @ap: Port to which ATAPI device is attached.
5082 * @qc: Taskfile currently active
5083 *
5084 * When device has indicated its readiness to accept
5085 * a CDB, this function is called. Send the CDB.
5086 *
5087 * LOCKING:
5088 * caller.
5089 */
5090
5091static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
5092{
5093 /* send SCSI cdb */
5094 DPRINTK("send cdb\n");
Jeff Garzikdb024d52006-02-13 00:23:57 -05005095 WARN_ON(qc->dev->cdb_len < 12);
Albert Leec71c1852005-10-04 06:03:45 -04005096
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005097 ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
Albert Leec71c1852005-10-04 06:03:45 -04005098 ata_altstatus(ap); /* flush */
5099
5100 switch (qc->tf.protocol) {
5101 case ATA_PROT_ATAPI:
5102 ap->hsm_task_state = HSM_ST;
5103 break;
5104 case ATA_PROT_ATAPI_NODATA:
5105 ap->hsm_task_state = HSM_ST_LAST;
5106 break;
5107 case ATA_PROT_ATAPI_DMA:
5108 ap->hsm_task_state = HSM_ST_LAST;
5109 /* initiate bmdma */
5110 ap->ops->bmdma_start(qc);
5111 break;
5112 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005113}
5114
Albert Lee6ae4cfb2005-08-12 14:15:34 +08005115/**
5116 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
5117 * @qc: Command on going
5118 * @bytes: number of bytes
5119 *
5120 * Transfer Transfer data from/to the ATAPI device.
5121 *
5122 * LOCKING:
5123 * Inherited from caller.
5124 *
5125 */
Tejun Heo140b5e52007-12-12 12:21:52 +09005126static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005127{
5128 int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005129 struct ata_port *ap = qc->ap;
Tejun Heo140b5e52007-12-12 12:21:52 +09005130 struct ata_eh_info *ehi = &qc->dev->link->eh_info;
5131 struct scatterlist *sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005132 struct page *page;
5133 unsigned char *buf;
5134 unsigned int offset, count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005135
5136next_sg:
Tejun Heo140b5e52007-12-12 12:21:52 +09005137 sg = qc->cursg;
5138 if (unlikely(!sg)) {
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04005139 /*
Albert Lee563a6e12005-08-12 14:17:50 +08005140 * The end of qc->sg is reached and the device expects
5141 * more data to transfer. In order not to overrun qc->sg
5142 * and fulfill length specified in the byte count register,
5143 * - for read case, discard trailing data from the device
5144 * - for write case, padding zero data to the device
5145 */
5146 u16 pad_buf[1] = { 0 };
Albert Lee563a6e12005-08-12 14:17:50 +08005147 unsigned int i;
5148
Tejun Heo140b5e52007-12-12 12:21:52 +09005149 if (bytes > qc->curbytes - qc->nbytes + ATAPI_MAX_DRAIN) {
5150 ata_ehi_push_desc(ehi, "too much trailing data "
5151 "buf=%u cur=%u bytes=%u",
5152 qc->nbytes, qc->curbytes, bytes);
5153 return -1;
5154 }
Albert Lee563a6e12005-08-12 14:17:50 +08005155
Tejun Heo140b5e52007-12-12 12:21:52 +09005156 /* overflow is exptected for misc ATAPI commands */
5157 if (bytes && !atapi_qc_may_overflow(qc))
5158 ata_dev_printk(qc->dev, KERN_WARNING, "ATAPI %u bytes "
5159 "trailing data (cdb=%02x nbytes=%u)\n",
5160 bytes, qc->cdb[0], qc->nbytes);
5161
5162 for (i = 0; i < (bytes + 1) / 2; i++)
Jeff Garzik2dcb4072007-10-19 06:42:56 -04005163 ap->ops->data_xfer(qc->dev, (unsigned char *)pad_buf, 2, do_write);
Albert Lee563a6e12005-08-12 14:17:50 +08005164
Tejun Heo140b5e52007-12-12 12:21:52 +09005165 qc->curbytes += bytes;
Albert Lee563a6e12005-08-12 14:17:50 +08005166
Tejun Heo140b5e52007-12-12 12:21:52 +09005167 return 0;
5168 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005169
Jens Axboe45711f12007-10-22 21:19:53 +02005170 page = sg_page(sg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005171 offset = sg->offset + qc->cursg_ofs;
5172
5173 /* get the current page and offset */
5174 page = nth_page(page, (offset >> PAGE_SHIFT));
5175 offset %= PAGE_SIZE;
5176
Albert Lee6952df02005-06-06 15:56:03 +08005177 /* don't overrun current sg */
Albert Lee32529e02005-05-26 03:49:42 -04005178 count = min(sg->length - qc->cursg_ofs, bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005179
5180 /* don't cross page boundaries */
5181 count = min(count, (unsigned int)PAGE_SIZE - offset);
5182
Albert Lee7282aa42005-10-09 09:46:07 -04005183 DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
5184
Albert Lee91b8b312005-10-09 09:48:44 -04005185 if (PageHighMem(page)) {
5186 unsigned long flags;
Albert Lee7282aa42005-10-09 09:46:07 -04005187
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005188 /* FIXME: use bounce buffer */
Albert Lee91b8b312005-10-09 09:48:44 -04005189 local_irq_save(flags);
5190 buf = kmap_atomic(page, KM_IRQ0);
Albert Lee083958d2005-10-09 09:47:31 -04005191
Albert Lee91b8b312005-10-09 09:48:44 -04005192 /* do the actual data transfer */
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005193 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04005194
5195 kunmap_atomic(buf, KM_IRQ0);
5196 local_irq_restore(flags);
5197 } else {
5198 buf = page_address(page);
Alan Coxa6b2c5d2006-05-22 16:59:59 +01005199 ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
Albert Lee91b8b312005-10-09 09:48:44 -04005200 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005201
5202 bytes -= count;
Tejun Heo140b5e52007-12-12 12:21:52 +09005203 if ((count & 1) && bytes)
5204 bytes--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005205 qc->curbytes += count;
5206 qc->cursg_ofs += count;
5207
Albert Lee32529e02005-05-26 03:49:42 -04005208 if (qc->cursg_ofs == sg->length) {
Jens Axboe87260212007-10-16 11:14:12 +02005209 qc->cursg = sg_next(qc->cursg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005210 qc->cursg_ofs = 0;
5211 }
5212
Albert Lee563a6e12005-08-12 14:17:50 +08005213 if (bytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005214 goto next_sg;
Tejun Heo140b5e52007-12-12 12:21:52 +09005215
5216 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005217}
5218
Albert Lee6ae4cfb2005-08-12 14:15:34 +08005219/**
5220 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
5221 * @qc: Command on going
5222 *
5223 * Transfer Transfer data from/to the ATAPI device.
5224 *
5225 * LOCKING:
5226 * Inherited from caller.
Albert Lee6ae4cfb2005-08-12 14:15:34 +08005227 */
5228
Linus Torvalds1da177e2005-04-16 15:20:36 -07005229static void atapi_pio_bytes(struct ata_queued_cmd *qc)
5230{
5231 struct ata_port *ap = qc->ap;
5232 struct ata_device *dev = qc->dev;
5233 unsigned int ireason, bc_lo, bc_hi, bytes;
5234 int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
5235
Albert Leeeec4c3f2006-05-18 17:51:10 +08005236 /* Abuse qc->result_tf for temp storage of intermediate TF
5237 * here to save some kernel stack usage.
5238 * For normal completion, qc->result_tf is not relevant. For
5239 * error, qc->result_tf is later overwritten by ata_qc_complete().
5240 * So, the correctness of qc->result_tf is not affected.
5241 */
5242 ap->ops->tf_read(ap, &qc->result_tf);
5243 ireason = qc->result_tf.nsect;
5244 bc_lo = qc->result_tf.lbam;
5245 bc_hi = qc->result_tf.lbah;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005246 bytes = (bc_hi << 8) | bc_lo;
5247
5248 /* shall be cleared to zero, indicating xfer of data */
5249 if (ireason & (1 << 0))
5250 goto err_out;
5251
5252 /* make sure transfer direction matches expected */
5253 i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
5254 if (do_write != i_write)
5255 goto err_out;
5256
Tejun Heo44877b42007-02-21 01:06:51 +09005257 VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
Albert Lee312f7da2005-09-27 17:38:03 +08005258
Tejun Heo140b5e52007-12-12 12:21:52 +09005259 if (__atapi_pio_bytes(qc, bytes))
5260 goto err_out;
Albert Lee4cc980b2007-08-15 03:19:45 -04005261 ata_altstatus(ap); /* flush */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005262
5263 return;
5264
5265err_out:
Tejun Heof15a1da2006-05-15 20:57:56 +09005266 ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
Tejun Heo11a56d22006-01-23 13:09:36 +09005267 qc->err_mask |= AC_ERR_HSM;
Albert Lee14be71f2005-09-27 17:36:35 +08005268 ap->hsm_task_state = HSM_ST_ERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005269}
5270
5271/**
Albert Leec234fb02006-03-25 17:58:38 +08005272 * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
5273 * @ap: the target ata_port
5274 * @qc: qc on going
Linus Torvalds1da177e2005-04-16 15:20:36 -07005275 *
Albert Leec234fb02006-03-25 17:58:38 +08005276 * RETURNS:
5277 * 1 if ok in workqueue, 0 otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005278 */
Albert Leec234fb02006-03-25 17:58:38 +08005279
5280static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005281{
Albert Leec234fb02006-03-25 17:58:38 +08005282 if (qc->tf.flags & ATA_TFLAG_POLLING)
5283 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005284
Albert Leec234fb02006-03-25 17:58:38 +08005285 if (ap->hsm_task_state == HSM_ST_FIRST) {
5286 if (qc->tf.protocol == ATA_PROT_PIO &&
5287 (qc->tf.flags & ATA_TFLAG_WRITE))
5288 return 1;
5289
Tejun Heo405e66b2007-11-27 19:28:53 +09005290 if (ata_is_atapi(qc->tf.protocol) &&
Albert Leec234fb02006-03-25 17:58:38 +08005291 !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
5292 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005293 }
5294
Albert Leec234fb02006-03-25 17:58:38 +08005295 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005296}
5297
Albert Leec234fb02006-03-25 17:58:38 +08005298/**
Tejun Heoc17ea202006-05-15 20:59:29 +09005299 * ata_hsm_qc_complete - finish a qc running on standard HSM
5300 * @qc: Command to complete
5301 * @in_wq: 1 if called from workqueue, 0 otherwise
5302 *
5303 * Finish @qc which is running on standard HSM.
5304 *
5305 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005306 * If @in_wq is zero, spin_lock_irqsave(host lock).
Tejun Heoc17ea202006-05-15 20:59:29 +09005307 * Otherwise, none on entry and grabs host lock.
5308 */
5309static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
5310{
5311 struct ata_port *ap = qc->ap;
5312 unsigned long flags;
5313
5314 if (ap->ops->error_handler) {
5315 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04005316 spin_lock_irqsave(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09005317
Jeff Garzikcca39742006-08-24 03:19:22 -04005318 /* EH might have kicked in while host lock is
5319 * released.
Tejun Heoc17ea202006-05-15 20:59:29 +09005320 */
5321 qc = ata_qc_from_tag(ap, qc->tag);
5322 if (qc) {
5323 if (likely(!(qc->err_mask & AC_ERR_HSM))) {
Akira Iguchi836250062007-01-26 16:27:32 +09005324 ap->ops->irq_on(ap);
Tejun Heoc17ea202006-05-15 20:59:29 +09005325 ata_qc_complete(qc);
5326 } else
5327 ata_port_freeze(ap);
5328 }
5329
Jeff Garzikba6a1302006-06-22 23:46:10 -04005330 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09005331 } else {
5332 if (likely(!(qc->err_mask & AC_ERR_HSM)))
5333 ata_qc_complete(qc);
5334 else
5335 ata_port_freeze(ap);
5336 }
5337 } else {
5338 if (in_wq) {
Jeff Garzikba6a1302006-06-22 23:46:10 -04005339 spin_lock_irqsave(ap->lock, flags);
Akira Iguchi836250062007-01-26 16:27:32 +09005340 ap->ops->irq_on(ap);
Tejun Heoc17ea202006-05-15 20:59:29 +09005341 ata_qc_complete(qc);
Jeff Garzikba6a1302006-06-22 23:46:10 -04005342 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heoc17ea202006-05-15 20:59:29 +09005343 } else
5344 ata_qc_complete(qc);
5345 }
5346}
5347
5348/**
Albert Leebb5cb292006-03-25 17:48:02 +08005349 * ata_hsm_move - move the HSM to the next state.
5350 * @ap: the target ata_port
5351 * @qc: qc on going
5352 * @status: current device status
5353 * @in_wq: 1 if called from workqueue, 0 otherwise
5354 *
5355 * RETURNS:
5356 * 1 when poll next status needed, 0 otherwise.
5357 */
Tejun Heo9a1004d2006-05-31 18:27:52 +09005358int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
5359 u8 status, int in_wq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005360{
Albert Leebb5cb292006-03-25 17:48:02 +08005361 unsigned long flags = 0;
5362 int poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005363
Albert Lee6912ccd2006-03-25 17:45:49 +08005364 WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
Albert Lee0565c262006-02-13 18:55:25 +08005365
Albert Leebb5cb292006-03-25 17:48:02 +08005366 /* Make sure ata_qc_issue_prot() does not throw things
5367 * like DMA polling into the workqueue. Notice that
5368 * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
Albert Lee1c848982005-12-05 15:40:15 +08005369 */
Albert Leec234fb02006-03-25 17:58:38 +08005370 WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
Albert Lee1c848982005-12-05 15:40:15 +08005371
Albert Leee2cec772006-03-25 17:43:49 +08005372fsm_start:
Albert Lee999bb6f2006-03-25 18:07:48 +08005373 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
Tejun Heo44877b42007-02-21 01:06:51 +09005374 ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005375
Albert Leee2cec772006-03-25 17:43:49 +08005376 switch (ap->hsm_task_state) {
5377 case HSM_ST_FIRST:
Albert Leebb5cb292006-03-25 17:48:02 +08005378 /* Send first data block or PACKET CDB */
5379
5380 /* If polling, we will stay in the work queue after
5381 * sending the data. Otherwise, interrupt handler
5382 * takes over after sending the data.
5383 */
5384 poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
5385
Albert Leee2cec772006-03-25 17:43:49 +08005386 /* check device status */
Albert Lee3655d1d2006-05-19 11:43:04 +08005387 if (unlikely((status & ATA_DRQ) == 0)) {
5388 /* handle BSY=0, DRQ=0 as error */
5389 if (likely(status & (ATA_ERR | ATA_DF)))
5390 /* device stops HSM for abort/error */
5391 qc->err_mask |= AC_ERR_DEV;
5392 else
5393 /* HSM violation. Let EH handle this */
5394 qc->err_mask |= AC_ERR_HSM;
5395
Albert Leee2cec772006-03-25 17:43:49 +08005396 ap->hsm_task_state = HSM_ST_ERR;
5397 goto fsm_start;
5398 }
5399
Albert Lee71601952006-03-25 18:11:12 +08005400 /* Device should not ask for data transfer (DRQ=1)
5401 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08005402 * We ignore DRQ here and stop the HSM by
5403 * changing hsm_task_state to HSM_ST_ERR and
5404 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08005405 */
5406 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee2d3b8ee2007-11-15 10:35:46 +09005407 /* Some ATAPI tape drives forget to clear the ERR bit
5408 * when doing the next command (mostly request sense).
5409 * We ignore ERR here to workaround and proceed sending
5410 * the CDB.
5411 */
5412 if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) {
5413 ata_port_printk(ap, KERN_WARNING,
5414 "DRQ=1 with device error, "
5415 "dev_stat 0x%X\n", status);
5416 qc->err_mask |= AC_ERR_HSM;
5417 ap->hsm_task_state = HSM_ST_ERR;
5418 goto fsm_start;
5419 }
Albert Lee71601952006-03-25 18:11:12 +08005420 }
5421
Albert Leebb5cb292006-03-25 17:48:02 +08005422 /* Send the CDB (atapi) or the first data block (ata pio out).
5423 * During the state transition, interrupt handler shouldn't
5424 * be invoked before the data transfer is complete and
5425 * hsm_task_state is changed. Hence, the following locking.
5426 */
5427 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04005428 spin_lock_irqsave(ap->lock, flags);
Albert Leee2cec772006-03-25 17:43:49 +08005429
Albert Leebb5cb292006-03-25 17:48:02 +08005430 if (qc->tf.protocol == ATA_PROT_PIO) {
5431 /* PIO data out protocol.
5432 * send first data block.
5433 */
5434
5435 /* ata_pio_sectors() might change the state
5436 * to HSM_ST_LAST. so, the state is changed here
5437 * before ata_pio_sectors().
5438 */
5439 ap->hsm_task_state = HSM_ST;
5440 ata_pio_sectors(qc);
Albert Leebb5cb292006-03-25 17:48:02 +08005441 } else
5442 /* send CDB */
5443 atapi_send_cdb(ap, qc);
5444
5445 if (in_wq)
Jeff Garzikba6a1302006-06-22 23:46:10 -04005446 spin_unlock_irqrestore(ap->lock, flags);
Albert Leebb5cb292006-03-25 17:48:02 +08005447
5448 /* if polling, ata_pio_task() handles the rest.
5449 * otherwise, interrupt handler takes over from here.
5450 */
Albert Leee2cec772006-03-25 17:43:49 +08005451 break;
5452
5453 case HSM_ST:
5454 /* complete command or read/write the data register */
5455 if (qc->tf.protocol == ATA_PROT_ATAPI) {
5456 /* ATAPI PIO protocol */
5457 if ((status & ATA_DRQ) == 0) {
Albert Lee3655d1d2006-05-19 11:43:04 +08005458 /* No more data to transfer or device error.
5459 * Device error will be tagged in HSM_ST_LAST.
5460 */
Albert Leee2cec772006-03-25 17:43:49 +08005461 ap->hsm_task_state = HSM_ST_LAST;
5462 goto fsm_start;
5463 }
5464
Albert Lee71601952006-03-25 18:11:12 +08005465 /* Device should not ask for data transfer (DRQ=1)
5466 * when it finds something wrong.
Albert Leeeee6c322006-04-01 17:38:43 +08005467 * We ignore DRQ here and stop the HSM by
5468 * changing hsm_task_state to HSM_ST_ERR and
5469 * let the EH abort the command or reset the device.
Albert Lee71601952006-03-25 18:11:12 +08005470 */
5471 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Tejun Heo44877b42007-02-21 01:06:51 +09005472 ata_port_printk(ap, KERN_WARNING, "DRQ=1 with "
5473 "device error, dev_stat 0x%X\n",
5474 status);
Albert Lee3655d1d2006-05-19 11:43:04 +08005475 qc->err_mask |= AC_ERR_HSM;
Albert Leeeee6c322006-04-01 17:38:43 +08005476 ap->hsm_task_state = HSM_ST_ERR;
5477 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08005478 }
5479
Albert Leee2cec772006-03-25 17:43:49 +08005480 atapi_pio_bytes(qc);
5481
5482 if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
5483 /* bad ireason reported by device */
5484 goto fsm_start;
5485
5486 } else {
5487 /* ATA PIO protocol */
5488 if (unlikely((status & ATA_DRQ) == 0)) {
5489 /* handle BSY=0, DRQ=0 as error */
Albert Lee3655d1d2006-05-19 11:43:04 +08005490 if (likely(status & (ATA_ERR | ATA_DF)))
5491 /* device stops HSM for abort/error */
5492 qc->err_mask |= AC_ERR_DEV;
5493 else
Tejun Heo55a8e2c2006-11-10 18:08:10 +09005494 /* HSM violation. Let EH handle this.
5495 * Phantom devices also trigger this
5496 * condition. Mark hint.
5497 */
5498 qc->err_mask |= AC_ERR_HSM |
5499 AC_ERR_NODEV_HINT;
Albert Lee3655d1d2006-05-19 11:43:04 +08005500
Albert Leee2cec772006-03-25 17:43:49 +08005501 ap->hsm_task_state = HSM_ST_ERR;
5502 goto fsm_start;
5503 }
5504
Albert Leeeee6c322006-04-01 17:38:43 +08005505 /* For PIO reads, some devices may ask for
5506 * data transfer (DRQ=1) alone with ERR=1.
5507 * We respect DRQ here and transfer one
5508 * block of junk data before changing the
5509 * hsm_task_state to HSM_ST_ERR.
5510 *
5511 * For PIO writes, ERR=1 DRQ=1 doesn't make
5512 * sense since the data block has been
5513 * transferred to the device.
Albert Lee71601952006-03-25 18:11:12 +08005514 */
5515 if (unlikely(status & (ATA_ERR | ATA_DF))) {
Albert Lee71601952006-03-25 18:11:12 +08005516 /* data might be corrputed */
5517 qc->err_mask |= AC_ERR_DEV;
Albert Leeeee6c322006-04-01 17:38:43 +08005518
5519 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
5520 ata_pio_sectors(qc);
Albert Leeeee6c322006-04-01 17:38:43 +08005521 status = ata_wait_idle(ap);
5522 }
5523
Albert Lee3655d1d2006-05-19 11:43:04 +08005524 if (status & (ATA_BUSY | ATA_DRQ))
5525 qc->err_mask |= AC_ERR_HSM;
5526
Albert Leeeee6c322006-04-01 17:38:43 +08005527 /* ata_pio_sectors() might change the
5528 * state to HSM_ST_LAST. so, the state
5529 * is changed after ata_pio_sectors().
5530 */
5531 ap->hsm_task_state = HSM_ST_ERR;
5532 goto fsm_start;
Albert Lee71601952006-03-25 18:11:12 +08005533 }
5534
Albert Leee2cec772006-03-25 17:43:49 +08005535 ata_pio_sectors(qc);
5536
5537 if (ap->hsm_task_state == HSM_ST_LAST &&
5538 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
5539 /* all data read */
Albert Lee52a32202006-03-25 18:18:15 +08005540 status = ata_wait_idle(ap);
Albert Leee2cec772006-03-25 17:43:49 +08005541 goto fsm_start;
5542 }
5543 }
5544
Albert Leebb5cb292006-03-25 17:48:02 +08005545 poll_next = 1;
Albert Leee2cec772006-03-25 17:43:49 +08005546 break;
5547
5548 case HSM_ST_LAST:
Albert Lee6912ccd2006-03-25 17:45:49 +08005549 if (unlikely(!ata_ok(status))) {
5550 qc->err_mask |= __ac_err_mask(status);
Albert Leee2cec772006-03-25 17:43:49 +08005551 ap->hsm_task_state = HSM_ST_ERR;
5552 goto fsm_start;
5553 }
5554
5555 /* no more data to transfer */
Albert Lee4332a772006-04-03 17:43:24 +08005556 DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
Tejun Heo44877b42007-02-21 01:06:51 +09005557 ap->print_id, qc->dev->devno, status);
Albert Leee2cec772006-03-25 17:43:49 +08005558
Albert Lee6912ccd2006-03-25 17:45:49 +08005559 WARN_ON(qc->err_mask);
5560
Albert Leee2cec772006-03-25 17:43:49 +08005561 ap->hsm_task_state = HSM_ST_IDLE;
5562
5563 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09005564 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08005565
5566 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08005567 break;
5568
5569 case HSM_ST_ERR:
Albert Leee2cec772006-03-25 17:43:49 +08005570 /* make sure qc->err_mask is available to
5571 * know what's wrong and recover
5572 */
5573 WARN_ON(qc->err_mask == 0);
5574
5575 ap->hsm_task_state = HSM_ST_IDLE;
Albert Leebb5cb292006-03-25 17:48:02 +08005576
Albert Lee999bb6f2006-03-25 18:07:48 +08005577 /* complete taskfile transaction */
Tejun Heoc17ea202006-05-15 20:59:29 +09005578 ata_hsm_qc_complete(qc, in_wq);
Albert Leebb5cb292006-03-25 17:48:02 +08005579
5580 poll_next = 0;
Albert Leee2cec772006-03-25 17:43:49 +08005581 break;
5582 default:
Albert Leebb5cb292006-03-25 17:48:02 +08005583 poll_next = 0;
Albert Lee6912ccd2006-03-25 17:45:49 +08005584 BUG();
Albert Leee2cec772006-03-25 17:43:49 +08005585 }
5586
Albert Leebb5cb292006-03-25 17:48:02 +08005587 return poll_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005588}
5589
David Howells65f27f32006-11-22 14:55:48 +00005590static void ata_pio_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005591{
David Howells65f27f32006-11-22 14:55:48 +00005592 struct ata_port *ap =
5593 container_of(work, struct ata_port, port_task.work);
5594 struct ata_queued_cmd *qc = ap->port_task_data;
Albert Leea1af3732006-03-25 17:50:15 +08005595 u8 status;
5596 int poll_next;
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04005597
5598fsm_start:
Albert Leea1af3732006-03-25 17:50:15 +08005599 WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005600
Albert Leea1af3732006-03-25 17:50:15 +08005601 /*
5602 * This is purely heuristic. This is a fast path.
5603 * Sometimes when we enter, BSY will be cleared in
5604 * a chk-status or two. If not, the drive is probably seeking
5605 * or something. Snooze for a couple msecs, then
5606 * chk-status again. If still busy, queue delayed work.
5607 */
5608 status = ata_busy_wait(ap, ATA_BUSY, 5);
5609 if (status & ATA_BUSY) {
5610 msleep(2);
5611 status = ata_busy_wait(ap, ATA_BUSY, 10);
5612 if (status & ATA_BUSY) {
Albert Lee31ce6da2006-04-03 18:31:44 +08005613 ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
Albert Leea1af3732006-03-25 17:50:15 +08005614 return;
5615 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005616 }
5617
Albert Leea1af3732006-03-25 17:50:15 +08005618 /* move the HSM */
5619 poll_next = ata_hsm_move(ap, qc, status, 1);
5620
5621 /* another command or interrupt handler
5622 * may be running at this point.
5623 */
5624 if (poll_next)
Jeff Garzik7fb6ec22005-09-16 06:01:48 -04005625 goto fsm_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005626}
5627
Linus Torvalds1da177e2005-04-16 15:20:36 -07005628/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07005629 * ata_qc_new - Request an available ATA command, for queueing
5630 * @ap: Port associated with device @dev
5631 * @dev: Device from whom we request an available command structure
5632 *
5633 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005634 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005635 */
5636
5637static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
5638{
5639 struct ata_queued_cmd *qc = NULL;
5640 unsigned int i;
5641
Tejun Heoe3180492006-05-15 20:58:09 +09005642 /* no command while frozen */
Tejun Heob51e9e52006-06-29 01:29:30 +09005643 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
Tejun Heoe3180492006-05-15 20:58:09 +09005644 return NULL;
5645
Tejun Heo2ab7db12006-05-15 20:58:02 +09005646 /* the last tag is reserved for internal command. */
5647 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
Tejun Heo6cec4a32006-05-15 21:03:41 +09005648 if (!test_and_set_bit(i, &ap->qc_allocated)) {
Tejun Heof69499f2006-05-15 20:58:03 +09005649 qc = __ata_qc_from_tag(ap, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005650 break;
5651 }
5652
5653 if (qc)
5654 qc->tag = i;
5655
5656 return qc;
5657}
5658
5659/**
5660 * ata_qc_new_init - Request an available ATA command, and initialize it
Linus Torvalds1da177e2005-04-16 15:20:36 -07005661 * @dev: Device from whom we request an available command structure
5662 *
5663 * LOCKING:
Jeff Garzik0cba6322005-05-30 19:49:12 -04005664 * None.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005665 */
5666
Tejun Heo3373efd2006-05-15 20:57:53 +09005667struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005668{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005669 struct ata_port *ap = dev->link->ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005670 struct ata_queued_cmd *qc;
5671
5672 qc = ata_qc_new(ap);
5673 if (qc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005674 qc->scsicmd = NULL;
5675 qc->ap = ap;
5676 qc->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005677
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05005678 ata_qc_reinit(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005679 }
5680
5681 return qc;
5682}
5683
Linus Torvalds1da177e2005-04-16 15:20:36 -07005684/**
5685 * ata_qc_free - free unused ata_queued_cmd
5686 * @qc: Command to complete
5687 *
5688 * Designed to free unused ata_queued_cmd object
5689 * in case something prevents using it.
5690 *
5691 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005692 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005693 */
5694void ata_qc_free(struct ata_queued_cmd *qc)
5695{
Tejun Heo4ba946e2006-01-23 13:09:36 +09005696 struct ata_port *ap = qc->ap;
5697 unsigned int tag;
5698
Tejun Heoa46314742006-02-11 19:11:13 +09005699 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07005700
Tejun Heo4ba946e2006-01-23 13:09:36 +09005701 qc->flags = 0;
5702 tag = qc->tag;
5703 if (likely(ata_tag_valid(tag))) {
Tejun Heo4ba946e2006-01-23 13:09:36 +09005704 qc->tag = ATA_TAG_POISON;
Tejun Heo6cec4a32006-05-15 21:03:41 +09005705 clear_bit(tag, &ap->qc_allocated);
Tejun Heo4ba946e2006-01-23 13:09:36 +09005706 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005707}
5708
Tejun Heo76014422006-02-11 15:13:49 +09005709void __ata_qc_complete(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005710{
Tejun Heodedaf2b2006-05-15 21:03:43 +09005711 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005712 struct ata_link *link = qc->dev->link;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005713
Tejun Heoa46314742006-02-11 19:11:13 +09005714 WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
5715 WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07005716
5717 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
5718 ata_sg_clean(qc);
5719
Tejun Heo7401abf2006-05-15 20:57:32 +09005720 /* command should be marked inactive atomically with qc completion */
Tejun Heoda917d62007-09-23 13:14:12 +09005721 if (qc->tf.protocol == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005722 link->sactive &= ~(1 << qc->tag);
Tejun Heoda917d62007-09-23 13:14:12 +09005723 if (!link->sactive)
5724 ap->nr_active_links--;
5725 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005726 link->active_tag = ATA_TAG_POISON;
Tejun Heoda917d62007-09-23 13:14:12 +09005727 ap->nr_active_links--;
5728 }
5729
5730 /* clear exclusive status */
5731 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
5732 ap->excl_link == link))
5733 ap->excl_link = NULL;
Tejun Heo7401abf2006-05-15 20:57:32 +09005734
Albert Lee3f3791d2005-08-16 14:25:38 +08005735 /* atapi: mark qc as inactive to prevent the interrupt handler
5736 * from completing the command twice later, before the error handler
5737 * is called. (when rc != 0 and atapi request sense is needed)
5738 */
5739 qc->flags &= ~ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005740 ap->qc_active &= ~(1 << qc->tag);
Albert Lee3f3791d2005-08-16 14:25:38 +08005741
Linus Torvalds1da177e2005-04-16 15:20:36 -07005742 /* call completion callback */
Tejun Heo77853bf2006-01-23 13:09:36 +09005743 qc->complete_fn(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005744}
5745
Tejun Heo39599a52006-11-14 22:37:35 +09005746static void fill_result_tf(struct ata_queued_cmd *qc)
5747{
5748 struct ata_port *ap = qc->ap;
5749
Tejun Heo39599a52006-11-14 22:37:35 +09005750 qc->result_tf.flags = qc->tf.flags;
Mark Lord4742d542007-04-02 16:20:35 -04005751 ap->ops->tf_read(ap, &qc->result_tf);
Tejun Heo39599a52006-11-14 22:37:35 +09005752}
5753
Tejun Heo00115e02007-11-27 19:28:58 +09005754static void ata_verify_xfer(struct ata_queued_cmd *qc)
5755{
5756 struct ata_device *dev = qc->dev;
5757
5758 if (ata_tag_internal(qc->tag))
5759 return;
5760
5761 if (ata_is_nodata(qc->tf.protocol))
5762 return;
5763
5764 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
5765 return;
5766
5767 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
5768}
5769
Tejun Heof686bcb2006-05-15 20:58:05 +09005770/**
5771 * ata_qc_complete - Complete an active ATA command
5772 * @qc: Command to complete
5773 * @err_mask: ATA Status register contents
5774 *
5775 * Indicate to the mid and upper layers that an ATA
5776 * command has completed, with either an ok or not-ok status.
5777 *
5778 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005779 * spin_lock_irqsave(host lock)
Tejun Heof686bcb2006-05-15 20:58:05 +09005780 */
5781void ata_qc_complete(struct ata_queued_cmd *qc)
5782{
5783 struct ata_port *ap = qc->ap;
5784
5785 /* XXX: New EH and old EH use different mechanisms to
5786 * synchronize EH with regular execution path.
5787 *
5788 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
5789 * Normal execution path is responsible for not accessing a
5790 * failed qc. libata core enforces the rule by returning NULL
5791 * from ata_qc_from_tag() for failed qcs.
5792 *
5793 * Old EH depends on ata_qc_complete() nullifying completion
5794 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
5795 * not synchronize with interrupt handler. Only PIO task is
5796 * taken care of.
5797 */
5798 if (ap->ops->error_handler) {
Tejun Heo4dbfa392007-10-25 18:22:44 +09005799 struct ata_device *dev = qc->dev;
5800 struct ata_eh_info *ehi = &dev->link->eh_info;
5801
Tejun Heob51e9e52006-06-29 01:29:30 +09005802 WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
Tejun Heof686bcb2006-05-15 20:58:05 +09005803
5804 if (unlikely(qc->err_mask))
5805 qc->flags |= ATA_QCFLAG_FAILED;
5806
5807 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
5808 if (!ata_tag_internal(qc->tag)) {
5809 /* always fill result TF for failed qc */
Tejun Heo39599a52006-11-14 22:37:35 +09005810 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005811 ata_qc_schedule_eh(qc);
5812 return;
5813 }
5814 }
5815
5816 /* read result TF if requested */
5817 if (qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09005818 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005819
Tejun Heo4dbfa392007-10-25 18:22:44 +09005820 /* Some commands need post-processing after successful
5821 * completion.
5822 */
5823 switch (qc->tf.command) {
5824 case ATA_CMD_SET_FEATURES:
5825 if (qc->tf.feature != SETFEATURES_WC_ON &&
5826 qc->tf.feature != SETFEATURES_WC_OFF)
5827 break;
5828 /* fall through */
5829 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
5830 case ATA_CMD_SET_MULTI: /* multi_count changed */
5831 /* revalidate device */
5832 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
5833 ata_port_schedule_eh(ap);
5834 break;
Tejun Heo054a5fb2007-10-25 18:30:36 +09005835
5836 case ATA_CMD_SLEEP:
5837 dev->flags |= ATA_DFLAG_SLEEPING;
5838 break;
Tejun Heo4dbfa392007-10-25 18:22:44 +09005839 }
5840
Tejun Heo00115e02007-11-27 19:28:58 +09005841 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
5842 ata_verify_xfer(qc);
5843
Tejun Heof686bcb2006-05-15 20:58:05 +09005844 __ata_qc_complete(qc);
5845 } else {
5846 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
5847 return;
5848
5849 /* read result TF if failed or requested */
5850 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
Tejun Heo39599a52006-11-14 22:37:35 +09005851 fill_result_tf(qc);
Tejun Heof686bcb2006-05-15 20:58:05 +09005852
5853 __ata_qc_complete(qc);
5854 }
5855}
5856
Tejun Heodedaf2b2006-05-15 21:03:43 +09005857/**
5858 * ata_qc_complete_multiple - Complete multiple qcs successfully
5859 * @ap: port in question
5860 * @qc_active: new qc_active mask
5861 * @finish_qc: LLDD callback invoked before completing a qc
5862 *
5863 * Complete in-flight commands. This functions is meant to be
5864 * called from low-level driver's interrupt routine to complete
5865 * requests normally. ap->qc_active and @qc_active is compared
5866 * and commands are completed accordingly.
5867 *
5868 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005869 * spin_lock_irqsave(host lock)
Tejun Heodedaf2b2006-05-15 21:03:43 +09005870 *
5871 * RETURNS:
5872 * Number of completed commands on success, -errno otherwise.
5873 */
5874int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
5875 void (*finish_qc)(struct ata_queued_cmd *))
5876{
5877 int nr_done = 0;
5878 u32 done_mask;
5879 int i;
5880
5881 done_mask = ap->qc_active ^ qc_active;
5882
5883 if (unlikely(done_mask & qc_active)) {
5884 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
5885 "(%08x->%08x)\n", ap->qc_active, qc_active);
5886 return -EINVAL;
5887 }
5888
5889 for (i = 0; i < ATA_MAX_QUEUE; i++) {
5890 struct ata_queued_cmd *qc;
5891
5892 if (!(done_mask & (1 << i)))
5893 continue;
5894
5895 if ((qc = ata_qc_from_tag(ap, i))) {
5896 if (finish_qc)
5897 finish_qc(qc);
5898 ata_qc_complete(qc);
5899 nr_done++;
5900 }
5901 }
5902
5903 return nr_done;
5904}
5905
Linus Torvalds1da177e2005-04-16 15:20:36 -07005906/**
5907 * ata_qc_issue - issue taskfile to device
5908 * @qc: command to issue to device
5909 *
5910 * Prepare an ATA command to submission to device.
5911 * This includes mapping the data into a DMA-able
5912 * area, filling in the S/G table, and finally
5913 * writing the taskfile to hardware, starting the command.
5914 *
5915 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005916 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005917 */
Tejun Heo8e0e6942006-03-31 20:41:11 +09005918void ata_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005919{
5920 struct ata_port *ap = qc->ap;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005921 struct ata_link *link = qc->dev->link;
Tejun Heo405e66b2007-11-27 19:28:53 +09005922 u8 prot = qc->tf.protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005923
Tejun Heodedaf2b2006-05-15 21:03:43 +09005924 /* Make sure only one non-NCQ command is outstanding. The
5925 * check is skipped for old EH because it reuses active qc to
5926 * request ATAPI sense.
5927 */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005928 WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
Tejun Heodedaf2b2006-05-15 21:03:43 +09005929
Tejun Heo405e66b2007-11-27 19:28:53 +09005930 if (prot == ATA_PROT_NCQ) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005931 WARN_ON(link->sactive & (1 << qc->tag));
Tejun Heoda917d62007-09-23 13:14:12 +09005932
5933 if (!link->sactive)
5934 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005935 link->sactive |= 1 << qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005936 } else {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005937 WARN_ON(link->sactive);
Tejun Heoda917d62007-09-23 13:14:12 +09005938
5939 ap->nr_active_links++;
Tejun Heo9af5c9c2007-08-06 18:36:22 +09005940 link->active_tag = qc->tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005941 }
5942
Tejun Heoe4a70e72006-03-31 20:36:47 +09005943 qc->flags |= ATA_QCFLAG_ACTIVE;
Tejun Heodedaf2b2006-05-15 21:03:43 +09005944 ap->qc_active |= 1 << qc->tag;
Tejun Heoe4a70e72006-03-31 20:36:47 +09005945
Tejun Heo405e66b2007-11-27 19:28:53 +09005946 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5947 (ap->flags & ATA_FLAG_PIO_DMA))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005948 if (qc->flags & ATA_QCFLAG_SG) {
5949 if (ata_sg_setup(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09005950 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005951 } else if (qc->flags & ATA_QCFLAG_SINGLE) {
5952 if (ata_sg_setup_one(qc))
Tejun Heo8e436af2006-01-23 13:09:36 +09005953 goto sg_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005954 }
5955 } else {
5956 qc->flags &= ~ATA_QCFLAG_DMAMAP;
5957 }
5958
Tejun Heo054a5fb2007-10-25 18:30:36 +09005959 /* if device is sleeping, schedule softreset and abort the link */
5960 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5961 link->eh_info.action |= ATA_EH_SOFTRESET;
5962 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5963 ata_link_abort(link);
5964 return;
5965 }
5966
Linus Torvalds1da177e2005-04-16 15:20:36 -07005967 ap->ops->qc_prep(qc);
5968
Tejun Heo8e0e6942006-03-31 20:41:11 +09005969 qc->err_mask |= ap->ops->qc_issue(qc);
5970 if (unlikely(qc->err_mask))
5971 goto err;
5972 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005973
Tejun Heo8e436af2006-01-23 13:09:36 +09005974sg_err:
5975 qc->flags &= ~ATA_QCFLAG_DMAMAP;
Tejun Heo8e0e6942006-03-31 20:41:11 +09005976 qc->err_mask |= AC_ERR_SYSTEM;
5977err:
5978 ata_qc_complete(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005979}
5980
5981/**
5982 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
5983 * @qc: command to issue to device
5984 *
5985 * Using various libata functions and hooks, this function
5986 * starts an ATA command. ATA commands are grouped into
5987 * classes called "protocols", and issuing each type of protocol
5988 * is slightly different.
5989 *
Edward Falk0baab862005-06-02 18:17:13 -04005990 * May be used as the qc_issue() entry in ata_port_operations.
5991 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005992 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04005993 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005994 *
5995 * RETURNS:
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005996 * Zero on success, AC_ERR_* mask on failure
Linus Torvalds1da177e2005-04-16 15:20:36 -07005997 */
5998
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09005999unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006000{
6001 struct ata_port *ap = qc->ap;
6002
Albert Leee50362e2005-09-27 17:39:50 +08006003 /* Use polling pio if the LLD doesn't handle
6004 * interrupt driven pio and atapi CDB interrupt.
6005 */
6006 if (ap->flags & ATA_FLAG_PIO_POLLING) {
6007 switch (qc->tf.protocol) {
6008 case ATA_PROT_PIO:
Albert Leee3472cb2006-12-07 11:37:58 +08006009 case ATA_PROT_NODATA:
Albert Leee50362e2005-09-27 17:39:50 +08006010 case ATA_PROT_ATAPI:
6011 case ATA_PROT_ATAPI_NODATA:
6012 qc->tf.flags |= ATA_TFLAG_POLLING;
6013 break;
6014 case ATA_PROT_ATAPI_DMA:
6015 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
Albert Lee3a778272006-06-22 13:00:25 +08006016 /* see ata_dma_blacklisted() */
Albert Leee50362e2005-09-27 17:39:50 +08006017 BUG();
6018 break;
6019 default:
6020 break;
6021 }
6022 }
6023
Albert Lee312f7da2005-09-27 17:38:03 +08006024 /* select the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006025 ata_dev_select(ap, qc->dev->devno, 1, 0);
6026
Albert Lee312f7da2005-09-27 17:38:03 +08006027 /* start the command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006028 switch (qc->tf.protocol) {
6029 case ATA_PROT_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08006030 if (qc->tf.flags & ATA_TFLAG_POLLING)
6031 ata_qc_set_polling(qc);
6032
Jeff Garzike5338252005-10-30 21:37:17 -05006033 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08006034 ap->hsm_task_state = HSM_ST_LAST;
6035
6036 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08006037 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08006038
Linus Torvalds1da177e2005-04-16 15:20:36 -07006039 break;
6040
6041 case ATA_PROT_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05006042 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08006043
Linus Torvalds1da177e2005-04-16 15:20:36 -07006044 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6045 ap->ops->bmdma_setup(qc); /* set up bmdma */
6046 ap->ops->bmdma_start(qc); /* initiate bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08006047 ap->hsm_task_state = HSM_ST_LAST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006048 break;
6049
Albert Lee312f7da2005-09-27 17:38:03 +08006050 case ATA_PROT_PIO:
6051 if (qc->tf.flags & ATA_TFLAG_POLLING)
6052 ata_qc_set_polling(qc);
6053
Jeff Garzike5338252005-10-30 21:37:17 -05006054 ata_tf_to_host(ap, &qc->tf);
Albert Lee312f7da2005-09-27 17:38:03 +08006055
Albert Lee54f00382005-09-30 19:14:19 +08006056 if (qc->tf.flags & ATA_TFLAG_WRITE) {
6057 /* PIO data out protocol */
6058 ap->hsm_task_state = HSM_ST_FIRST;
Albert Lee31ce6da2006-04-03 18:31:44 +08006059 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee54f00382005-09-30 19:14:19 +08006060
6061 /* always send first data block using
Albert Leee27486d2005-11-01 19:24:49 +08006062 * the ata_pio_task() codepath.
Albert Lee54f00382005-09-30 19:14:19 +08006063 */
Albert Lee312f7da2005-09-27 17:38:03 +08006064 } else {
Albert Lee54f00382005-09-30 19:14:19 +08006065 /* PIO data in protocol */
6066 ap->hsm_task_state = HSM_ST;
Albert Lee312f7da2005-09-27 17:38:03 +08006067
Albert Lee54f00382005-09-30 19:14:19 +08006068 if (qc->tf.flags & ATA_TFLAG_POLLING)
Albert Lee31ce6da2006-04-03 18:31:44 +08006069 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Albert Lee312f7da2005-09-27 17:38:03 +08006070
Albert Lee54f00382005-09-30 19:14:19 +08006071 /* if polling, ata_pio_task() handles the rest.
6072 * otherwise, interrupt handler takes over from here.
6073 */
Albert Lee312f7da2005-09-27 17:38:03 +08006074 }
6075
Linus Torvalds1da177e2005-04-16 15:20:36 -07006076 break;
6077
6078 case ATA_PROT_ATAPI:
Linus Torvalds1da177e2005-04-16 15:20:36 -07006079 case ATA_PROT_ATAPI_NODATA:
Albert Lee312f7da2005-09-27 17:38:03 +08006080 if (qc->tf.flags & ATA_TFLAG_POLLING)
6081 ata_qc_set_polling(qc);
6082
Jeff Garzike5338252005-10-30 21:37:17 -05006083 ata_tf_to_host(ap, &qc->tf);
Jeff Garzikf6ef65e2006-01-27 02:45:00 -05006084
Albert Lee312f7da2005-09-27 17:38:03 +08006085 ap->hsm_task_state = HSM_ST_FIRST;
6086
6087 /* send cdb by polling if no cdb interrupt */
6088 if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
6089 (qc->tf.flags & ATA_TFLAG_POLLING))
Albert Lee31ce6da2006-04-03 18:31:44 +08006090 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006091 break;
6092
6093 case ATA_PROT_ATAPI_DMA:
Jeff Garzik587005d2006-02-11 18:17:32 -05006094 WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
Albert Lee312f7da2005-09-27 17:38:03 +08006095
Linus Torvalds1da177e2005-04-16 15:20:36 -07006096 ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
6097 ap->ops->bmdma_setup(qc); /* set up bmdma */
Albert Lee312f7da2005-09-27 17:38:03 +08006098 ap->hsm_task_state = HSM_ST_FIRST;
6099
6100 /* send cdb by polling if no cdb interrupt */
6101 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Albert Lee31ce6da2006-04-03 18:31:44 +08006102 ata_port_queue_task(ap, ata_pio_task, qc, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006103 break;
6104
6105 default:
6106 WARN_ON(1);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +09006107 return AC_ERR_SYSTEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006108 }
6109
6110 return 0;
6111}
6112
6113/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07006114 * ata_host_intr - Handle host interrupt for given (port, task)
6115 * @ap: Port on which interrupt arrived (possibly...)
6116 * @qc: Taskfile currently active in engine
6117 *
6118 * Handle host interrupt for given queued command. Currently,
6119 * only DMA interrupts are handled. All other commands are
6120 * handled via polling with interrupts disabled (nIEN bit).
6121 *
6122 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04006123 * spin_lock_irqsave(host lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006124 *
6125 * RETURNS:
6126 * One if interrupt was handled, zero if not (shared irq).
6127 */
6128
Jeff Garzik2dcb4072007-10-19 06:42:56 -04006129inline unsigned int ata_host_intr(struct ata_port *ap,
6130 struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006131{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006132 struct ata_eh_info *ehi = &ap->link.eh_info;
Albert Lee312f7da2005-09-27 17:38:03 +08006133 u8 status, host_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006134
Albert Lee312f7da2005-09-27 17:38:03 +08006135 VPRINTK("ata%u: protocol %d task_state %d\n",
Tejun Heo44877b42007-02-21 01:06:51 +09006136 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006137
Albert Lee312f7da2005-09-27 17:38:03 +08006138 /* Check whether we are expecting interrupt in this state */
6139 switch (ap->hsm_task_state) {
6140 case HSM_ST_FIRST:
Albert Lee6912ccd2006-03-25 17:45:49 +08006141 /* Some pre-ATAPI-4 devices assert INTRQ
6142 * at this state when ready to receive CDB.
6143 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006144
Albert Lee312f7da2005-09-27 17:38:03 +08006145 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
Tejun Heo405e66b2007-11-27 19:28:53 +09006146 * The flag was turned on only for atapi devices. No
6147 * need to check ata_is_atapi(qc->tf.protocol) again.
Albert Lee312f7da2005-09-27 17:38:03 +08006148 */
6149 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07006150 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006151 break;
Albert Lee312f7da2005-09-27 17:38:03 +08006152 case HSM_ST_LAST:
6153 if (qc->tf.protocol == ATA_PROT_DMA ||
6154 qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
6155 /* check status of DMA engine */
6156 host_stat = ap->ops->bmdma_status(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09006157 VPRINTK("ata%u: host_stat 0x%X\n",
6158 ap->print_id, host_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006159
Albert Lee312f7da2005-09-27 17:38:03 +08006160 /* if it's not our irq... */
6161 if (!(host_stat & ATA_DMA_INTR))
6162 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006163
Albert Lee312f7da2005-09-27 17:38:03 +08006164 /* before we do anything else, clear DMA-Start bit */
6165 ap->ops->bmdma_stop(qc);
Albert Leea4f16612005-12-26 16:40:53 +08006166
6167 if (unlikely(host_stat & ATA_DMA_ERR)) {
6168 /* error when transfering data to/from memory */
6169 qc->err_mask |= AC_ERR_HOST_BUS;
6170 ap->hsm_task_state = HSM_ST_ERR;
6171 }
Albert Lee312f7da2005-09-27 17:38:03 +08006172 }
6173 break;
6174 case HSM_ST:
6175 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006176 default:
6177 goto idle_irq;
6178 }
6179
Albert Lee312f7da2005-09-27 17:38:03 +08006180 /* check altstatus */
6181 status = ata_altstatus(ap);
6182 if (status & ATA_BUSY)
6183 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006184
Albert Lee312f7da2005-09-27 17:38:03 +08006185 /* check main status, clearing INTRQ */
6186 status = ata_chk_status(ap);
6187 if (unlikely(status & ATA_BUSY))
6188 goto idle_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006189
Albert Lee312f7da2005-09-27 17:38:03 +08006190 /* ack bmdma irq events */
6191 ap->ops->irq_clear(ap);
6192
Albert Leebb5cb292006-03-25 17:48:02 +08006193 ata_hsm_move(ap, qc, status, 0);
Tejun Heoea547632006-11-17 12:06:21 +09006194
6195 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
6196 qc->tf.protocol == ATA_PROT_ATAPI_DMA))
6197 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
6198
Linus Torvalds1da177e2005-04-16 15:20:36 -07006199 return 1; /* irq handled */
6200
6201idle_irq:
6202 ap->stats.idle_irq++;
6203
6204#ifdef ATA_IRQ_TRAP
6205 if ((ap->stats.idle_irq % 1000) == 0) {
Jeff Garzik6d32d302007-08-15 05:38:46 -04006206 ata_chk_status(ap);
6207 ap->ops->irq_clear(ap);
Tejun Heof15a1da2006-05-15 20:57:56 +09006208 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
Alan Cox23cfce82006-03-21 16:06:53 +00006209 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006210 }
6211#endif
6212 return 0; /* irq not handled */
6213}
6214
6215/**
6216 * ata_interrupt - Default ATA host interrupt handler
Jeff Garzik0cba6322005-05-30 19:49:12 -04006217 * @irq: irq line (unused)
Jeff Garzikcca39742006-08-24 03:19:22 -04006218 * @dev_instance: pointer to our ata_host information structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07006219 *
Jeff Garzik0cba6322005-05-30 19:49:12 -04006220 * Default interrupt handler for PCI IDE devices. Calls
6221 * ata_host_intr() for each port that is not disabled.
6222 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006223 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -04006224 * Obtains host lock during operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006225 *
6226 * RETURNS:
Jeff Garzik0cba6322005-05-30 19:49:12 -04006227 * IRQ_NONE or IRQ_HANDLED.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006228 */
6229
Jeff Garzik2dcb4072007-10-19 06:42:56 -04006230irqreturn_t ata_interrupt(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006231{
Jeff Garzikcca39742006-08-24 03:19:22 -04006232 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006233 unsigned int i;
6234 unsigned int handled = 0;
6235 unsigned long flags;
6236
6237 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
Jeff Garzikcca39742006-08-24 03:19:22 -04006238 spin_lock_irqsave(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006239
Jeff Garzikcca39742006-08-24 03:19:22 -04006240 for (i = 0; i < host->n_ports; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006241 struct ata_port *ap;
6242
Jeff Garzikcca39742006-08-24 03:19:22 -04006243 ap = host->ports[i];
Tejun Heoc1389502005-08-22 14:59:24 +09006244 if (ap &&
Jeff Garzik029f5462006-04-02 10:30:40 -04006245 !(ap->flags & ATA_FLAG_DISABLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07006246 struct ata_queued_cmd *qc;
6247
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006248 qc = ata_qc_from_tag(ap, ap->link.active_tag);
Albert Lee312f7da2005-09-27 17:38:03 +08006249 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
Albert Lee21b1ed72005-04-29 17:34:59 +08006250 (qc->flags & ATA_QCFLAG_ACTIVE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07006251 handled |= ata_host_intr(ap, qc);
6252 }
6253 }
6254
Jeff Garzikcca39742006-08-24 03:19:22 -04006255 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006256
6257 return IRQ_RETVAL(handled);
6258}
6259
Tejun Heo34bf2172006-05-15 20:57:46 +09006260/**
6261 * sata_scr_valid - test whether SCRs are accessible
Tejun Heo936fd732007-08-06 18:36:23 +09006262 * @link: ATA link to test SCR accessibility for
Tejun Heo34bf2172006-05-15 20:57:46 +09006263 *
Tejun Heo936fd732007-08-06 18:36:23 +09006264 * Test whether SCRs are accessible for @link.
Tejun Heo34bf2172006-05-15 20:57:46 +09006265 *
6266 * LOCKING:
6267 * None.
6268 *
6269 * RETURNS:
6270 * 1 if SCRs are accessible, 0 otherwise.
6271 */
Tejun Heo936fd732007-08-06 18:36:23 +09006272int sata_scr_valid(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09006273{
Tejun Heo936fd732007-08-06 18:36:23 +09006274 struct ata_port *ap = link->ap;
6275
Tejun Heoa16abc02007-05-21 18:33:47 +02006276 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
Tejun Heo34bf2172006-05-15 20:57:46 +09006277}
6278
6279/**
6280 * sata_scr_read - read SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09006281 * @link: ATA link to read SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09006282 * @reg: SCR to read
6283 * @val: Place to store read value
6284 *
Tejun Heo936fd732007-08-06 18:36:23 +09006285 * Read SCR register @reg of @link into *@val. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09006286 * guaranteed to succeed if @link is ap->link, the cable type of
6287 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09006288 *
6289 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09006290 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09006291 *
6292 * RETURNS:
6293 * 0 on success, negative errno on failure.
6294 */
Tejun Heo936fd732007-08-06 18:36:23 +09006295int sata_scr_read(struct ata_link *link, int reg, u32 *val)
Tejun Heo34bf2172006-05-15 20:57:46 +09006296{
Tejun Heo633273a2007-09-23 13:19:54 +09006297 if (ata_is_host_link(link)) {
6298 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09006299
Tejun Heo633273a2007-09-23 13:19:54 +09006300 if (sata_scr_valid(link))
6301 return ap->ops->scr_read(ap, reg, val);
6302 return -EOPNOTSUPP;
6303 }
6304
6305 return sata_pmp_scr_read(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09006306}
6307
6308/**
6309 * sata_scr_write - write SCR register of the specified port
Tejun Heo936fd732007-08-06 18:36:23 +09006310 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09006311 * @reg: SCR to write
6312 * @val: value to write
6313 *
Tejun Heo936fd732007-08-06 18:36:23 +09006314 * Write @val to SCR register @reg of @link. This function is
Tejun Heo633273a2007-09-23 13:19:54 +09006315 * guaranteed to succeed if @link is ap->link, the cable type of
6316 * the port is SATA and the port implements ->scr_read.
Tejun Heo34bf2172006-05-15 20:57:46 +09006317 *
6318 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09006319 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09006320 *
6321 * RETURNS:
6322 * 0 on success, negative errno on failure.
6323 */
Tejun Heo936fd732007-08-06 18:36:23 +09006324int sata_scr_write(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09006325{
Tejun Heo633273a2007-09-23 13:19:54 +09006326 if (ata_is_host_link(link)) {
6327 struct ata_port *ap = link->ap;
Tejun Heo936fd732007-08-06 18:36:23 +09006328
Tejun Heo633273a2007-09-23 13:19:54 +09006329 if (sata_scr_valid(link))
6330 return ap->ops->scr_write(ap, reg, val);
6331 return -EOPNOTSUPP;
6332 }
6333
6334 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09006335}
6336
6337/**
6338 * sata_scr_write_flush - write SCR register of the specified port and flush
Tejun Heo936fd732007-08-06 18:36:23 +09006339 * @link: ATA link to write SCR for
Tejun Heo34bf2172006-05-15 20:57:46 +09006340 * @reg: SCR to write
6341 * @val: value to write
6342 *
6343 * This function is identical to sata_scr_write() except that this
6344 * function performs flush after writing to the register.
6345 *
6346 * LOCKING:
Tejun Heo633273a2007-09-23 13:19:54 +09006347 * None if @link is ap->link. Kernel thread context otherwise.
Tejun Heo34bf2172006-05-15 20:57:46 +09006348 *
6349 * RETURNS:
6350 * 0 on success, negative errno on failure.
6351 */
Tejun Heo936fd732007-08-06 18:36:23 +09006352int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
Tejun Heo34bf2172006-05-15 20:57:46 +09006353{
Tejun Heo633273a2007-09-23 13:19:54 +09006354 if (ata_is_host_link(link)) {
6355 struct ata_port *ap = link->ap;
6356 int rc;
Tejun Heoda3dbb12007-07-16 14:29:40 +09006357
Tejun Heo633273a2007-09-23 13:19:54 +09006358 if (sata_scr_valid(link)) {
6359 rc = ap->ops->scr_write(ap, reg, val);
6360 if (rc == 0)
6361 rc = ap->ops->scr_read(ap, reg, &val);
6362 return rc;
6363 }
6364 return -EOPNOTSUPP;
Tejun Heo34bf2172006-05-15 20:57:46 +09006365 }
Tejun Heo633273a2007-09-23 13:19:54 +09006366
6367 return sata_pmp_scr_write(link, reg, val);
Tejun Heo34bf2172006-05-15 20:57:46 +09006368}
6369
6370/**
Tejun Heo936fd732007-08-06 18:36:23 +09006371 * ata_link_online - test whether the given link is online
6372 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09006373 *
Tejun Heo936fd732007-08-06 18:36:23 +09006374 * Test whether @link is online. Note that this function returns
6375 * 0 if online status of @link cannot be obtained, so
6376 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09006377 *
6378 * LOCKING:
6379 * None.
6380 *
6381 * RETURNS:
6382 * 1 if the port online status is available and online.
6383 */
Tejun Heo936fd732007-08-06 18:36:23 +09006384int ata_link_online(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09006385{
6386 u32 sstatus;
6387
Tejun Heo936fd732007-08-06 18:36:23 +09006388 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6389 (sstatus & 0xf) == 0x3)
Tejun Heo34bf2172006-05-15 20:57:46 +09006390 return 1;
6391 return 0;
6392}
6393
6394/**
Tejun Heo936fd732007-08-06 18:36:23 +09006395 * ata_link_offline - test whether the given link is offline
6396 * @link: ATA link to test
Tejun Heo34bf2172006-05-15 20:57:46 +09006397 *
Tejun Heo936fd732007-08-06 18:36:23 +09006398 * Test whether @link is offline. Note that this function
6399 * returns 0 if offline status of @link cannot be obtained, so
6400 * ata_link_online(link) != !ata_link_offline(link).
Tejun Heo34bf2172006-05-15 20:57:46 +09006401 *
6402 * LOCKING:
6403 * None.
6404 *
6405 * RETURNS:
6406 * 1 if the port offline status is available and offline.
6407 */
Tejun Heo936fd732007-08-06 18:36:23 +09006408int ata_link_offline(struct ata_link *link)
Tejun Heo34bf2172006-05-15 20:57:46 +09006409{
6410 u32 sstatus;
6411
Tejun Heo936fd732007-08-06 18:36:23 +09006412 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
6413 (sstatus & 0xf) != 0x3)
Tejun Heo34bf2172006-05-15 20:57:46 +09006414 return 1;
6415 return 0;
6416}
Edward Falk0baab862005-06-02 18:17:13 -04006417
Tejun Heo77b08fb2006-06-24 20:30:19 +09006418int ata_flush_cache(struct ata_device *dev)
Jens Axboe9b847542006-01-06 09:28:07 +01006419{
Tejun Heo977e6b92006-06-24 20:30:19 +09006420 unsigned int err_mask;
Jens Axboe9b847542006-01-06 09:28:07 +01006421 u8 cmd;
6422
6423 if (!ata_try_flush_cache(dev))
6424 return 0;
6425
Tejun Heo6fc49ad2006-11-11 20:10:45 +09006426 if (dev->flags & ATA_DFLAG_FLUSH_EXT)
Jens Axboe9b847542006-01-06 09:28:07 +01006427 cmd = ATA_CMD_FLUSH_EXT;
6428 else
6429 cmd = ATA_CMD_FLUSH;
6430
Alan Cox4f343372007-08-08 14:30:31 +01006431 /* This is wrong. On a failed flush we get back the LBA of the lost
6432 sector and we should (assuming it wasn't aborted as unknown) issue
Jeff Garzik2dcb4072007-10-19 06:42:56 -04006433 a further flush command to continue the writeback until it
Alan Cox4f343372007-08-08 14:30:31 +01006434 does not error */
Tejun Heo977e6b92006-06-24 20:30:19 +09006435 err_mask = ata_do_simple_cmd(dev, cmd);
6436 if (err_mask) {
6437 ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
6438 return -EIO;
6439 }
6440
6441 return 0;
Jens Axboe9b847542006-01-06 09:28:07 +01006442}
6443
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006444#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04006445static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
6446 unsigned int action, unsigned int ehi_flags,
6447 int wait)
Tejun Heo500530f2006-07-03 16:07:27 +09006448{
6449 unsigned long flags;
6450 int i, rc;
6451
Jeff Garzikcca39742006-08-24 03:19:22 -04006452 for (i = 0; i < host->n_ports; i++) {
6453 struct ata_port *ap = host->ports[i];
Tejun Heoe3667eb2007-08-06 18:36:24 +09006454 struct ata_link *link;
Tejun Heo500530f2006-07-03 16:07:27 +09006455
6456 /* Previous resume operation might still be in
6457 * progress. Wait for PM_PENDING to clear.
6458 */
6459 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
6460 ata_port_wait_eh(ap);
6461 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6462 }
6463
6464 /* request PM ops to EH */
6465 spin_lock_irqsave(ap->lock, flags);
6466
6467 ap->pm_mesg = mesg;
6468 if (wait) {
6469 rc = 0;
6470 ap->pm_result = &rc;
6471 }
6472
6473 ap->pflags |= ATA_PFLAG_PM_PENDING;
Tejun Heoe3667eb2007-08-06 18:36:24 +09006474 __ata_port_for_each_link(link, ap) {
6475 link->eh_info.action |= action;
6476 link->eh_info.flags |= ehi_flags;
6477 }
Tejun Heo500530f2006-07-03 16:07:27 +09006478
6479 ata_port_schedule_eh(ap);
6480
6481 spin_unlock_irqrestore(ap->lock, flags);
6482
6483 /* wait and check result */
6484 if (wait) {
6485 ata_port_wait_eh(ap);
6486 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
6487 if (rc)
6488 return rc;
6489 }
6490 }
6491
6492 return 0;
6493}
6494
6495/**
Jeff Garzikcca39742006-08-24 03:19:22 -04006496 * ata_host_suspend - suspend host
6497 * @host: host to suspend
Tejun Heo500530f2006-07-03 16:07:27 +09006498 * @mesg: PM message
6499 *
Jeff Garzikcca39742006-08-24 03:19:22 -04006500 * Suspend @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09006501 * function requests EH to perform PM operations and waits for EH
6502 * to finish.
6503 *
6504 * LOCKING:
6505 * Kernel thread context (may sleep).
6506 *
6507 * RETURNS:
6508 * 0 on success, -errno on failure.
6509 */
Jeff Garzikcca39742006-08-24 03:19:22 -04006510int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09006511{
Tejun Heo9666f402007-05-04 21:27:47 +02006512 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09006513
Kristen Carlson Accardica773292007-10-25 00:58:59 -04006514 /*
6515 * disable link pm on all ports before requesting
6516 * any pm activity
6517 */
6518 ata_lpm_enable(host);
6519
Jeff Garzikcca39742006-08-24 03:19:22 -04006520 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
Tejun Heo9666f402007-05-04 21:27:47 +02006521 if (rc == 0)
6522 host->dev->power.power_state = mesg;
Tejun Heo500530f2006-07-03 16:07:27 +09006523 return rc;
6524}
6525
6526/**
Jeff Garzikcca39742006-08-24 03:19:22 -04006527 * ata_host_resume - resume host
6528 * @host: host to resume
Tejun Heo500530f2006-07-03 16:07:27 +09006529 *
Jeff Garzikcca39742006-08-24 03:19:22 -04006530 * Resume @host. Actual operation is performed by EH. This
Tejun Heo500530f2006-07-03 16:07:27 +09006531 * function requests EH to perform PM operations and returns.
6532 * Note that all resume operations are performed parallely.
6533 *
6534 * LOCKING:
6535 * Kernel thread context (may sleep).
6536 */
Jeff Garzikcca39742006-08-24 03:19:22 -04006537void ata_host_resume(struct ata_host *host)
Tejun Heo500530f2006-07-03 16:07:27 +09006538{
Jeff Garzikcca39742006-08-24 03:19:22 -04006539 ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET,
6540 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
6541 host->dev->power.power_state = PMSG_ON;
Kristen Carlson Accardica773292007-10-25 00:58:59 -04006542
6543 /* reenable link pm */
6544 ata_lpm_disable(host);
Tejun Heo500530f2006-07-03 16:07:27 +09006545}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09006546#endif
Tejun Heo500530f2006-07-03 16:07:27 +09006547
Randy Dunlapc893a3a2006-01-28 13:15:32 -05006548/**
6549 * ata_port_start - Set port up for dma.
6550 * @ap: Port to initialize
6551 *
6552 * Called just after data structures for each port are
6553 * initialized. Allocates space for PRD table.
6554 *
6555 * May be used as the port_start() entry in ata_port_operations.
6556 *
6557 * LOCKING:
6558 * Inherited from caller.
6559 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09006560int ata_port_start(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006561{
Brian King2f1f6102006-03-23 17:30:15 -06006562 struct device *dev = ap->dev;
Jeff Garzik6037d6b2005-11-04 22:08:00 -05006563 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006564
Tejun Heof0d36ef2007-01-20 16:00:28 +09006565 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
6566 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006567 if (!ap->prd)
6568 return -ENOMEM;
6569
Jeff Garzik6037d6b2005-11-04 22:08:00 -05006570 rc = ata_pad_alloc(ap, dev);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006571 if (rc)
Jeff Garzik6037d6b2005-11-04 22:08:00 -05006572 return rc;
Jeff Garzikcedc9a42005-10-05 07:13:30 -04006573
Tejun Heof0d36ef2007-01-20 16:00:28 +09006574 DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd,
6575 (unsigned long long)ap->prd_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006576 return 0;
6577}
6578
Edward Falk0baab862005-06-02 18:17:13 -04006579/**
Tejun Heo3ef3b432006-05-31 18:27:30 +09006580 * ata_dev_init - Initialize an ata_device structure
6581 * @dev: Device structure to initialize
6582 *
6583 * Initialize @dev in preparation for probing.
6584 *
6585 * LOCKING:
6586 * Inherited from caller.
6587 */
6588void ata_dev_init(struct ata_device *dev)
6589{
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006590 struct ata_link *link = dev->link;
6591 struct ata_port *ap = link->ap;
Tejun Heo72fa4b72006-05-31 18:27:32 +09006592 unsigned long flags;
Tejun Heo3ef3b432006-05-31 18:27:30 +09006593
Tejun Heo5a04bf42006-05-31 18:27:38 +09006594 /* SATA spd limit is bound to the first device */
Tejun Heo9af5c9c2007-08-06 18:36:22 +09006595 link->sata_spd_limit = link->hw_sata_spd_limit;
6596 link->sata_spd = 0;
Tejun Heo5a04bf42006-05-31 18:27:38 +09006597
Tejun Heo72fa4b72006-05-31 18:27:32 +09006598 /* High bits of dev->flags are used to record warm plug
6599 * requests which occur asynchronously. Synchronize using
Jeff Garzikcca39742006-08-24 03:19:22 -04006600 * host lock.
Tejun Heo72fa4b72006-05-31 18:27:32 +09006601 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04006602 spin_lock_irqsave(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09006603 dev->flags &= ~ATA_DFLAG_INIT_MASK;
Tejun Heo3dcc3232007-09-03 12:20:11 +09006604 dev->horkage = 0;
Jeff Garzikba6a1302006-06-22 23:46:10 -04006605 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo72fa4b72006-05-31 18:27:32 +09006606
6607 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
6608 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
Tejun Heo3ef3b432006-05-31 18:27:30 +09006609 dev->pio_mask = UINT_MAX;
6610 dev->mwdma_mask = UINT_MAX;
6611 dev->udma_mask = UINT_MAX;
6612}
6613
6614/**
Tejun Heo4fb37a22007-08-06 18:36:23 +09006615 * ata_link_init - Initialize an ata_link structure
6616 * @ap: ATA port link is attached to
6617 * @link: Link structure to initialize
Tejun Heo89898052007-08-06 18:36:23 +09006618 * @pmp: Port multiplier port number
Tejun Heo4fb37a22007-08-06 18:36:23 +09006619 *
6620 * Initialize @link.
6621 *
6622 * LOCKING:
6623 * Kernel thread context (may sleep)
6624 */
Tejun Heofb7fd612007-09-23 13:14:12 +09006625void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
Tejun Heo4fb37a22007-08-06 18:36:23 +09006626{
6627 int i;
6628
6629 /* clear everything except for devices */
6630 memset(link, 0, offsetof(struct ata_link, device[0]));
6631
6632 link->ap = ap;
Tejun Heo89898052007-08-06 18:36:23 +09006633 link->pmp = pmp;
Tejun Heo4fb37a22007-08-06 18:36:23 +09006634 link->active_tag = ATA_TAG_POISON;
6635 link->hw_sata_spd_limit = UINT_MAX;
6636
6637 /* can't use iterator, ap isn't initialized yet */
6638 for (i = 0; i < ATA_MAX_DEVICES; i++) {
6639 struct ata_device *dev = &link->device[i];
6640
6641 dev->link = link;
6642 dev->devno = dev - link->device;
6643 ata_dev_init(dev);
6644 }
6645}
6646
6647/**
6648 * sata_link_init_spd - Initialize link->sata_spd_limit
6649 * @link: Link to configure sata_spd_limit for
6650 *
6651 * Initialize @link->[hw_]sata_spd_limit to the currently
6652 * configured value.
6653 *
6654 * LOCKING:
6655 * Kernel thread context (may sleep).
6656 *
6657 * RETURNS:
6658 * 0 on success, -errno on failure.
6659 */
Tejun Heofb7fd612007-09-23 13:14:12 +09006660int sata_link_init_spd(struct ata_link *link)
Tejun Heo4fb37a22007-08-06 18:36:23 +09006661{
6662 u32 scontrol, spd;
6663 int rc;
6664
6665 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
6666 if (rc)
6667 return rc;
6668
6669 spd = (scontrol >> 4) & 0xf;
6670 if (spd)
6671 link->hw_sata_spd_limit &= (1 << spd) - 1;
6672
6673 link->sata_spd_limit = link->hw_sata_spd_limit;
6674
6675 return 0;
6676}
6677
6678/**
Tejun Heof3187192007-04-17 23:44:07 +09006679 * ata_port_alloc - allocate and initialize basic ATA port resources
6680 * @host: ATA host this allocated port belongs to
Linus Torvalds1da177e2005-04-16 15:20:36 -07006681 *
Tejun Heof3187192007-04-17 23:44:07 +09006682 * Allocate and initialize basic ATA port resources.
6683 *
6684 * RETURNS:
6685 * Allocate ATA port on success, NULL on failure.
Jeff Garzik0cba6322005-05-30 19:49:12 -04006686 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006687 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09006688 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07006689 */
Tejun Heof3187192007-04-17 23:44:07 +09006690struct ata_port *ata_port_alloc(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006691{
Tejun Heof3187192007-04-17 23:44:07 +09006692 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006693
Tejun Heof3187192007-04-17 23:44:07 +09006694 DPRINTK("ENTER\n");
6695
6696 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
6697 if (!ap)
6698 return NULL;
6699
Tejun Heof4d6d002007-05-01 11:50:15 +02006700 ap->pflags |= ATA_PFLAG_INITIALIZING;
Jeff Garzikcca39742006-08-24 03:19:22 -04006701 ap->lock = &host->lock;
Tejun Heo198e0fe2006-04-02 18:51:52 +09006702 ap->flags = ATA_FLAG_DISABLED;
Tejun Heof3187192007-04-17 23:44:07 +09006703 ap->print_id = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006704 ap->ctl = ATA_DEVCTL_OBS;
Jeff Garzikcca39742006-08-24 03:19:22 -04006705 ap->host = host;
Tejun Heof3187192007-04-17 23:44:07 +09006706 ap->dev = host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006707 ap->last_ctl = 0xFF;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04006708
6709#if defined(ATA_VERBOSE_DEBUG)
6710 /* turn on all debugging levels */
6711 ap->msg_enable = 0x00FF;
6712#elif defined(ATA_DEBUG)
6713 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
Tejun Heo88574552006-06-25 20:00:35 +09006714#else
Borislav Petkov0dd4b212006-06-23 02:29:08 -04006715 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
Borislav Petkovbd5d8252006-06-11 23:17:01 -04006716#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07006717
David Howells65f27f32006-11-22 14:55:48 +00006718 INIT_DELAYED_WORK(&ap->port_task, NULL);
6719 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
6720 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
Tejun Heoa72ec4c2006-01-23 13:09:37 +09006721 INIT_LIST_HEAD(&ap->eh_done_q);
Tejun Heoc6cf9e92006-05-31 18:27:27 +09006722 init_waitqueue_head(&ap->eh_wait_q);
Tejun Heo5ddf24c2007-07-16 14:29:41 +09006723 init_timer_deferrable(&ap->fastdrain_timer);
6724 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
6725 ap->fastdrain_timer.data = (unsigned long)ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006726
Tejun Heo838df622006-05-15 20:57:44 +09006727 ap->cbl = ATA_CBL_NONE;
Tejun Heo838df622006-05-15 20:57:44 +09006728
Tejun Heo89898052007-08-06 18:36:23 +09006729 ata_link_init(ap, &ap->link, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006730
6731#ifdef ATA_IRQ_TRAP
6732 ap->stats.unhandled_irq = 1;
6733 ap->stats.idle_irq = 1;
6734#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07006735 return ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006736}
6737
Tejun Heof0d36ef2007-01-20 16:00:28 +09006738static void ata_host_release(struct device *gendev, void *res)
6739{
6740 struct ata_host *host = dev_get_drvdata(gendev);
6741 int i;
6742
6743 for (i = 0; i < host->n_ports; i++) {
6744 struct ata_port *ap = host->ports[i];
6745
Tejun Heoecef7252007-04-17 23:44:06 +09006746 if (!ap)
6747 continue;
6748
Tejun Heo49114872007-04-17 23:44:06 +09006749 if (ap->scsi_host)
Tejun Heo1aa506e2007-03-09 19:36:12 +09006750 scsi_host_put(ap->scsi_host);
6751
Tejun Heo633273a2007-09-23 13:19:54 +09006752 kfree(ap->pmp_link);
Tejun Heo49114872007-04-17 23:44:06 +09006753 kfree(ap);
Tejun Heo1aa506e2007-03-09 19:36:12 +09006754 host->ports[i] = NULL;
6755 }
6756
Tejun Heo1aa56cc2007-02-27 22:33:21 +09006757 dev_set_drvdata(gendev, NULL);
Tejun Heof0d36ef2007-01-20 16:00:28 +09006758}
6759
Linus Torvalds1da177e2005-04-16 15:20:36 -07006760/**
Tejun Heof3187192007-04-17 23:44:07 +09006761 * ata_host_alloc - allocate and init basic ATA host resources
6762 * @dev: generic device this host is associated with
6763 * @max_ports: maximum number of ATA ports associated with this host
6764 *
6765 * Allocate and initialize basic ATA host resources. LLD calls
6766 * this function to allocate a host, initializes it fully and
6767 * attaches it using ata_host_register().
6768 *
6769 * @max_ports ports are allocated and host->n_ports is
6770 * initialized to @max_ports. The caller is allowed to decrease
6771 * host->n_ports before calling ata_host_register(). The unused
6772 * ports will be automatically freed on registration.
6773 *
6774 * RETURNS:
6775 * Allocate ATA host on success, NULL on failure.
6776 *
6777 * LOCKING:
6778 * Inherited from calling layer (may sleep).
6779 */
6780struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
6781{
6782 struct ata_host *host;
6783 size_t sz;
6784 int i;
6785
6786 DPRINTK("ENTER\n");
6787
6788 if (!devres_open_group(dev, NULL, GFP_KERNEL))
6789 return NULL;
6790
6791 /* alloc a container for our list of ATA ports (buses) */
6792 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
6793 /* alloc a container for our list of ATA ports (buses) */
6794 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
6795 if (!host)
6796 goto err_out;
6797
6798 devres_add(dev, host);
6799 dev_set_drvdata(dev, host);
6800
6801 spin_lock_init(&host->lock);
6802 host->dev = dev;
6803 host->n_ports = max_ports;
6804
6805 /* allocate ports bound to this host */
6806 for (i = 0; i < max_ports; i++) {
6807 struct ata_port *ap;
6808
6809 ap = ata_port_alloc(host);
6810 if (!ap)
6811 goto err_out;
6812
6813 ap->port_no = i;
6814 host->ports[i] = ap;
6815 }
6816
6817 devres_remove_group(dev, NULL);
6818 return host;
6819
6820 err_out:
6821 devres_release_group(dev, NULL);
6822 return NULL;
6823}
6824
6825/**
Tejun Heof5cda252007-04-17 23:44:07 +09006826 * ata_host_alloc_pinfo - alloc host and init with port_info array
6827 * @dev: generic device this host is associated with
6828 * @ppi: array of ATA port_info to initialize host with
6829 * @n_ports: number of ATA ports attached to this host
6830 *
6831 * Allocate ATA host and initialize with info from @ppi. If NULL
6832 * terminated, @ppi may contain fewer entries than @n_ports. The
6833 * last entry will be used for the remaining ports.
6834 *
6835 * RETURNS:
6836 * Allocate ATA host on success, NULL on failure.
6837 *
6838 * LOCKING:
6839 * Inherited from calling layer (may sleep).
6840 */
6841struct ata_host *ata_host_alloc_pinfo(struct device *dev,
6842 const struct ata_port_info * const * ppi,
6843 int n_ports)
6844{
6845 const struct ata_port_info *pi;
6846 struct ata_host *host;
6847 int i, j;
6848
6849 host = ata_host_alloc(dev, n_ports);
6850 if (!host)
6851 return NULL;
6852
6853 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
6854 struct ata_port *ap = host->ports[i];
6855
6856 if (ppi[j])
6857 pi = ppi[j++];
6858
6859 ap->pio_mask = pi->pio_mask;
6860 ap->mwdma_mask = pi->mwdma_mask;
6861 ap->udma_mask = pi->udma_mask;
6862 ap->flags |= pi->flags;
Tejun Heo0c887582007-08-06 18:36:23 +09006863 ap->link.flags |= pi->link_flags;
Tejun Heof5cda252007-04-17 23:44:07 +09006864 ap->ops = pi->port_ops;
6865
6866 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
6867 host->ops = pi->port_ops;
6868 if (!host->private_data && pi->private_data)
6869 host->private_data = pi->private_data;
6870 }
6871
6872 return host;
6873}
6874
Tejun Heo32ebbc02007-11-08 13:09:00 +09006875static void ata_host_stop(struct device *gendev, void *res)
6876{
6877 struct ata_host *host = dev_get_drvdata(gendev);
6878 int i;
6879
6880 WARN_ON(!(host->flags & ATA_HOST_STARTED));
6881
6882 for (i = 0; i < host->n_ports; i++) {
6883 struct ata_port *ap = host->ports[i];
6884
6885 if (ap->ops->port_stop)
6886 ap->ops->port_stop(ap);
6887 }
6888
6889 if (host->ops->host_stop)
6890 host->ops->host_stop(host);
6891}
6892
Tejun Heof5cda252007-04-17 23:44:07 +09006893/**
Tejun Heoecef7252007-04-17 23:44:06 +09006894 * ata_host_start - start and freeze ports of an ATA host
6895 * @host: ATA host to start ports for
6896 *
6897 * Start and then freeze ports of @host. Started status is
6898 * recorded in host->flags, so this function can be called
6899 * multiple times. Ports are guaranteed to get started only
Tejun Heof3187192007-04-17 23:44:07 +09006900 * once. If host->ops isn't initialized yet, its set to the
6901 * first non-dummy port ops.
Tejun Heoecef7252007-04-17 23:44:06 +09006902 *
6903 * LOCKING:
6904 * Inherited from calling layer (may sleep).
6905 *
6906 * RETURNS:
6907 * 0 if all ports are started successfully, -errno otherwise.
6908 */
6909int ata_host_start(struct ata_host *host)
6910{
Tejun Heo32ebbc02007-11-08 13:09:00 +09006911 int have_stop = 0;
6912 void *start_dr = NULL;
Tejun Heoecef7252007-04-17 23:44:06 +09006913 int i, rc;
6914
6915 if (host->flags & ATA_HOST_STARTED)
6916 return 0;
6917
6918 for (i = 0; i < host->n_ports; i++) {
6919 struct ata_port *ap = host->ports[i];
6920
Tejun Heof3187192007-04-17 23:44:07 +09006921 if (!host->ops && !ata_port_is_dummy(ap))
6922 host->ops = ap->ops;
6923
Tejun Heo32ebbc02007-11-08 13:09:00 +09006924 if (ap->ops->port_stop)
6925 have_stop = 1;
6926 }
6927
6928 if (host->ops->host_stop)
6929 have_stop = 1;
6930
6931 if (have_stop) {
6932 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
6933 if (!start_dr)
6934 return -ENOMEM;
6935 }
6936
6937 for (i = 0; i < host->n_ports; i++) {
6938 struct ata_port *ap = host->ports[i];
6939
Tejun Heoecef7252007-04-17 23:44:06 +09006940 if (ap->ops->port_start) {
6941 rc = ap->ops->port_start(ap);
6942 if (rc) {
Alan Cox0f9fe9b2007-11-30 15:23:16 +00006943 if (rc != -ENODEV)
Andrew Morton0f757742008-01-10 14:33:09 -08006944 dev_printk(KERN_ERR, host->dev,
6945 "failed to start port %d "
6946 "(errno=%d)\n", i, rc);
Tejun Heoecef7252007-04-17 23:44:06 +09006947 goto err_out;
6948 }
6949 }
Tejun Heoecef7252007-04-17 23:44:06 +09006950 ata_eh_freeze_port(ap);
6951 }
6952
Tejun Heo32ebbc02007-11-08 13:09:00 +09006953 if (start_dr)
6954 devres_add(host->dev, start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09006955 host->flags |= ATA_HOST_STARTED;
6956 return 0;
6957
6958 err_out:
6959 while (--i >= 0) {
6960 struct ata_port *ap = host->ports[i];
6961
6962 if (ap->ops->port_stop)
6963 ap->ops->port_stop(ap);
6964 }
Tejun Heo32ebbc02007-11-08 13:09:00 +09006965 devres_free(start_dr);
Tejun Heoecef7252007-04-17 23:44:06 +09006966 return rc;
6967}
6968
6969/**
Jeff Garzikcca39742006-08-24 03:19:22 -04006970 * ata_sas_host_init - Initialize a host struct
6971 * @host: host to initialize
6972 * @dev: device host is attached to
6973 * @flags: host flags
6974 * @ops: port_ops
Brian Kingb03732f2006-08-07 14:27:10 -05006975 *
6976 * LOCKING:
6977 * PCI/etc. bus probe sem.
6978 *
6979 */
Tejun Heof3187192007-04-17 23:44:07 +09006980/* KILLME - the only user left is ipr */
Jeff Garzikcca39742006-08-24 03:19:22 -04006981void ata_host_init(struct ata_host *host, struct device *dev,
6982 unsigned long flags, const struct ata_port_operations *ops)
Brian Kingb03732f2006-08-07 14:27:10 -05006983{
Jeff Garzikcca39742006-08-24 03:19:22 -04006984 spin_lock_init(&host->lock);
6985 host->dev = dev;
6986 host->flags = flags;
6987 host->ops = ops;
Brian Kingb03732f2006-08-07 14:27:10 -05006988}
6989
6990/**
Tejun Heof3187192007-04-17 23:44:07 +09006991 * ata_host_register - register initialized ATA host
6992 * @host: ATA host to register
6993 * @sht: template for SCSI host
Jeff Garzik0cba6322005-05-30 19:49:12 -04006994 *
Tejun Heof3187192007-04-17 23:44:07 +09006995 * Register initialized ATA host. @host is allocated using
6996 * ata_host_alloc() and fully initialized by LLD. This function
6997 * starts ports, registers @host with ATA and SCSI layers and
6998 * probe registered devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006999 *
7000 * LOCKING:
Tejun Heof3187192007-04-17 23:44:07 +09007001 * Inherited from calling layer (may sleep).
Linus Torvalds1da177e2005-04-16 15:20:36 -07007002 *
7003 * RETURNS:
Tejun Heof3187192007-04-17 23:44:07 +09007004 * 0 on success, -errno otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -07007005 */
Tejun Heof3187192007-04-17 23:44:07 +09007006int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007007{
Tejun Heof3187192007-04-17 23:44:07 +09007008 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07007009
Tejun Heof3187192007-04-17 23:44:07 +09007010 /* host must have been started */
7011 if (!(host->flags & ATA_HOST_STARTED)) {
7012 dev_printk(KERN_ERR, host->dev,
7013 "BUG: trying to register unstarted host\n");
7014 WARN_ON(1);
7015 return -EINVAL;
Alan Cox02f076a2006-09-26 17:35:32 +01007016 }
Tejun Heof0d36ef2007-01-20 16:00:28 +09007017
Tejun Heof3187192007-04-17 23:44:07 +09007018 /* Blow away unused ports. This happens when LLD can't
7019 * determine the exact number of ports to allocate at
7020 * allocation time.
7021 */
7022 for (i = host->n_ports; host->ports[i]; i++)
7023 kfree(host->ports[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007024
Tejun Heof3187192007-04-17 23:44:07 +09007025 /* give ports names and add SCSI hosts */
7026 for (i = 0; i < host->n_ports; i++)
7027 host->ports[i]->print_id = ata_print_id++;
Tejun Heof0d36ef2007-01-20 16:00:28 +09007028
Tejun Heof3187192007-04-17 23:44:07 +09007029 rc = ata_scsi_add_hosts(host, sht);
Tejun Heoecef7252007-04-17 23:44:06 +09007030 if (rc)
Tejun Heof3187192007-04-17 23:44:07 +09007031 return rc;
Tejun Heoecef7252007-04-17 23:44:06 +09007032
Tejun Heofafbae82007-05-15 03:28:16 +09007033 /* associate with ACPI nodes */
7034 ata_acpi_associate(host);
7035
Tejun Heof3187192007-04-17 23:44:07 +09007036 /* set cable, sata_spd_limit and report */
Jeff Garzikcca39742006-08-24 03:19:22 -04007037 for (i = 0; i < host->n_ports; i++) {
7038 struct ata_port *ap = host->ports[i];
Tejun Heof3187192007-04-17 23:44:07 +09007039 unsigned long xfer_mask;
7040
7041 /* set SATA cable type if still unset */
7042 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
7043 ap->cbl = ATA_CBL_SATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07007044
Tejun Heo5a04bf42006-05-31 18:27:38 +09007045 /* init sata_spd_limit to the current value */
Tejun Heo4fb37a22007-08-06 18:36:23 +09007046 sata_link_init_spd(&ap->link);
Tejun Heo5a04bf42006-05-31 18:27:38 +09007047
Tejun Heocbcdd872007-08-18 13:14:55 +09007048 /* print per-port info to dmesg */
Tejun Heof3187192007-04-17 23:44:07 +09007049 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
7050 ap->udma_mask);
7051
Tejun Heoabf6e8e2007-10-09 14:57:25 +09007052 if (!ata_port_is_dummy(ap)) {
Tejun Heocbcdd872007-08-18 13:14:55 +09007053 ata_port_printk(ap, KERN_INFO,
7054 "%cATA max %s %s\n",
Tejun Heoa16abc02007-05-21 18:33:47 +02007055 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
Tejun Heof3187192007-04-17 23:44:07 +09007056 ata_mode_string(xfer_mask),
Tejun Heocbcdd872007-08-18 13:14:55 +09007057 ap->link.eh_info.desc);
Tejun Heoabf6e8e2007-10-09 14:57:25 +09007058 ata_ehi_clear_desc(&ap->link.eh_info);
7059 } else
Tejun Heof3187192007-04-17 23:44:07 +09007060 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
7061 }
7062
7063 /* perform each probe synchronously */
7064 DPRINTK("probe begin\n");
7065 for (i = 0; i < host->n_ports; i++) {
7066 struct ata_port *ap = host->ports[i];
7067 int rc;
7068
7069 /* probe */
Tejun Heo52783c52006-05-31 18:28:22 +09007070 if (ap->ops->error_handler) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +09007071 struct ata_eh_info *ehi = &ap->link.eh_info;
Tejun Heo3e706392006-05-31 18:28:11 +09007072 unsigned long flags;
7073
7074 ata_port_probe(ap);
7075
7076 /* kick EH for boot probing */
Jeff Garzikba6a1302006-06-22 23:46:10 -04007077 spin_lock_irqsave(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09007078
Tejun Heof58229f2007-08-06 18:36:23 +09007079 ehi->probe_mask =
7080 (1 << ata_link_max_devices(&ap->link)) - 1;
Tejun Heo1cdaf532006-07-03 16:07:26 +09007081 ehi->action |= ATA_EH_SOFTRESET;
7082 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
Tejun Heo3e706392006-05-31 18:28:11 +09007083
Tejun Heof4d6d002007-05-01 11:50:15 +02007084 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
Tejun Heob51e9e52006-06-29 01:29:30 +09007085 ap->pflags |= ATA_PFLAG_LOADING;
Tejun Heo3e706392006-05-31 18:28:11 +09007086 ata_port_schedule_eh(ap);
7087
Jeff Garzikba6a1302006-06-22 23:46:10 -04007088 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo3e706392006-05-31 18:28:11 +09007089
7090 /* wait for EH to finish */
7091 ata_port_wait_eh(ap);
7092 } else {
Tejun Heo44877b42007-02-21 01:06:51 +09007093 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09007094 rc = ata_bus_probe(ap);
Tejun Heo44877b42007-02-21 01:06:51 +09007095 DPRINTK("ata%u: bus probe end\n", ap->print_id);
Tejun Heo3e706392006-05-31 18:28:11 +09007096
7097 if (rc) {
7098 /* FIXME: do something useful here?
7099 * Current libata behavior will
7100 * tear down everything when
7101 * the module is removed
7102 * or the h/w is unplugged.
7103 */
7104 }
7105 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07007106 }
7107
7108 /* probes are done, now scan each port's disk(s) */
Randy Dunlapc893a3a2006-01-28 13:15:32 -05007109 DPRINTK("host probe begin\n");
Jeff Garzikcca39742006-08-24 03:19:22 -04007110 for (i = 0; i < host->n_ports; i++) {
7111 struct ata_port *ap = host->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07007112
Tejun Heo1ae46312007-07-16 14:29:40 +09007113 ata_scsi_scan_host(ap, 1);
Kristen Carlson Accardica773292007-10-25 00:58:59 -04007114 ata_lpm_schedule(ap, ap->pm_policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007115 }
7116
Tejun Heof3187192007-04-17 23:44:07 +09007117 return 0;
7118}
7119
7120/**
Tejun Heof5cda252007-04-17 23:44:07 +09007121 * ata_host_activate - start host, request IRQ and register it
7122 * @host: target ATA host
7123 * @irq: IRQ to request
7124 * @irq_handler: irq_handler used when requesting IRQ
7125 * @irq_flags: irq_flags used when requesting IRQ
7126 * @sht: scsi_host_template to use when registering the host
7127 *
7128 * After allocating an ATA host and initializing it, most libata
7129 * LLDs perform three steps to activate the host - start host,
7130 * request IRQ and register it. This helper takes necessasry
7131 * arguments and performs the three steps in one go.
7132 *
Paul Mundt3d46b2e2007-11-08 11:14:56 +09007133 * An invalid IRQ skips the IRQ registration and expects the host to
7134 * have set polling mode on the port. In this case, @irq_handler
7135 * should be NULL.
7136 *
Tejun Heof5cda252007-04-17 23:44:07 +09007137 * LOCKING:
7138 * Inherited from calling layer (may sleep).
7139 *
7140 * RETURNS:
7141 * 0 on success, -errno otherwise.
7142 */
7143int ata_host_activate(struct ata_host *host, int irq,
7144 irq_handler_t irq_handler, unsigned long irq_flags,
7145 struct scsi_host_template *sht)
7146{
Tejun Heocbcdd872007-08-18 13:14:55 +09007147 int i, rc;
Tejun Heof5cda252007-04-17 23:44:07 +09007148
7149 rc = ata_host_start(host);
7150 if (rc)
7151 return rc;
7152
Paul Mundt3d46b2e2007-11-08 11:14:56 +09007153 /* Special case for polling mode */
7154 if (!irq) {
7155 WARN_ON(irq_handler);
7156 return ata_host_register(host, sht);
7157 }
7158
Tejun Heof5cda252007-04-17 23:44:07 +09007159 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
7160 dev_driver_string(host->dev), host);
7161 if (rc)
7162 return rc;
7163
Tejun Heocbcdd872007-08-18 13:14:55 +09007164 for (i = 0; i < host->n_ports; i++)
7165 ata_port_desc(host->ports[i], "irq %d", irq);
Tejun Heo40318262007-07-03 01:38:47 +09007166
Tejun Heof5cda252007-04-17 23:44:07 +09007167 rc = ata_host_register(host, sht);
7168 /* if failed, just free the IRQ and leave ports alone */
7169 if (rc)
7170 devm_free_irq(host->dev, irq, host);
7171
7172 return rc;
7173}
7174
7175/**
Tejun Heo720ba122006-05-31 18:28:13 +09007176 * ata_port_detach - Detach ATA port in prepration of device removal
7177 * @ap: ATA port to be detached
7178 *
7179 * Detach all ATA devices and the associated SCSI devices of @ap;
7180 * then, remove the associated SCSI host. @ap is guaranteed to
7181 * be quiescent on return from this function.
7182 *
7183 * LOCKING:
7184 * Kernel thread context (may sleep).
7185 */
Adrian Bunk741b7762007-10-24 18:23:06 +02007186static void ata_port_detach(struct ata_port *ap)
Tejun Heo720ba122006-05-31 18:28:13 +09007187{
7188 unsigned long flags;
Tejun Heo41bda9c2007-08-06 18:36:24 +09007189 struct ata_link *link;
Tejun Heof58229f2007-08-06 18:36:23 +09007190 struct ata_device *dev;
Tejun Heo720ba122006-05-31 18:28:13 +09007191
7192 if (!ap->ops->error_handler)
Tejun Heoc3cf30a2006-08-05 03:59:11 +09007193 goto skip_eh;
Tejun Heo720ba122006-05-31 18:28:13 +09007194
7195 /* tell EH we're leaving & flush EH */
Jeff Garzikba6a1302006-06-22 23:46:10 -04007196 spin_lock_irqsave(ap->lock, flags);
Tejun Heob51e9e52006-06-29 01:29:30 +09007197 ap->pflags |= ATA_PFLAG_UNLOADING;
Jeff Garzikba6a1302006-06-22 23:46:10 -04007198 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09007199
7200 ata_port_wait_eh(ap);
7201
Tejun Heo7f9ad9b2007-12-15 15:05:00 +09007202 /* EH is now guaranteed to see UNLOADING - EH context belongs
7203 * to us. Disable all existing devices.
Tejun Heo720ba122006-05-31 18:28:13 +09007204 */
Tejun Heo41bda9c2007-08-06 18:36:24 +09007205 ata_port_for_each_link(link, ap) {
7206 ata_link_for_each_dev(dev, link)
7207 ata_dev_disable(dev);
7208 }
Tejun Heo720ba122006-05-31 18:28:13 +09007209
Tejun Heo720ba122006-05-31 18:28:13 +09007210 /* Final freeze & EH. All in-flight commands are aborted. EH
7211 * will be skipped and retrials will be terminated with bad
7212 * target.
7213 */
Jeff Garzikba6a1302006-06-22 23:46:10 -04007214 spin_lock_irqsave(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09007215 ata_port_freeze(ap); /* won't be thawed */
Jeff Garzikba6a1302006-06-22 23:46:10 -04007216 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo720ba122006-05-31 18:28:13 +09007217
7218 ata_port_wait_eh(ap);
Oleg Nesterov45a66c12007-07-09 11:46:13 -07007219 cancel_rearming_delayed_work(&ap->hotplug_task);
Tejun Heo720ba122006-05-31 18:28:13 +09007220
Tejun Heoc3cf30a2006-08-05 03:59:11 +09007221 skip_eh:
Tejun Heo720ba122006-05-31 18:28:13 +09007222 /* remove the associated SCSI host */
Jeff Garzikcca39742006-08-24 03:19:22 -04007223 scsi_remove_host(ap->scsi_host);
Tejun Heo720ba122006-05-31 18:28:13 +09007224}
7225
7226/**
Tejun Heo0529c152007-01-20 16:00:26 +09007227 * ata_host_detach - Detach all ports of an ATA host
7228 * @host: Host to detach
7229 *
7230 * Detach all ports of @host.
7231 *
7232 * LOCKING:
7233 * Kernel thread context (may sleep).
7234 */
7235void ata_host_detach(struct ata_host *host)
7236{
7237 int i;
7238
7239 for (i = 0; i < host->n_ports; i++)
7240 ata_port_detach(host->ports[i]);
Tejun Heo562f0c22007-12-15 15:05:01 +09007241
7242 /* the host is dead now, dissociate ACPI */
7243 ata_acpi_dissociate(host);
Tejun Heo0529c152007-01-20 16:00:26 +09007244}
7245
Linus Torvalds1da177e2005-04-16 15:20:36 -07007246/**
7247 * ata_std_ports - initialize ioaddr with standard port offsets.
7248 * @ioaddr: IO address structure to be initialized
Edward Falk0baab862005-06-02 18:17:13 -04007249 *
7250 * Utility function which initializes data_addr, error_addr,
7251 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
7252 * device_addr, status_addr, and command_addr to standard offsets
7253 * relative to cmd_addr.
7254 *
7255 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
Linus Torvalds1da177e2005-04-16 15:20:36 -07007256 */
Edward Falk0baab862005-06-02 18:17:13 -04007257
Linus Torvalds1da177e2005-04-16 15:20:36 -07007258void ata_std_ports(struct ata_ioports *ioaddr)
7259{
7260 ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
7261 ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
7262 ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
7263 ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
7264 ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
7265 ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
7266 ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
7267 ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
7268 ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
7269 ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
7270}
7271
Edward Falk0baab862005-06-02 18:17:13 -04007272
Jeff Garzik374b1872005-08-30 05:42:52 -04007273#ifdef CONFIG_PCI
7274
Edward Falk0baab862005-06-02 18:17:13 -04007275/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07007276 * ata_pci_remove_one - PCI layer callback for device removal
7277 * @pdev: PCI device that was removed
7278 *
Tejun Heob878ca52007-01-20 16:00:28 +09007279 * PCI layer indicates to libata via this hook that hot-unplug or
7280 * module unload event has occurred. Detach all ports. Resource
7281 * release is handled via devres.
Linus Torvalds1da177e2005-04-16 15:20:36 -07007282 *
7283 * LOCKING:
7284 * Inherited from PCI layer (may sleep).
7285 */
Tejun Heof0d36ef2007-01-20 16:00:28 +09007286void ata_pci_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007287{
Jeff Garzik28555682007-10-11 17:12:35 -04007288 struct device *dev = &pdev->dev;
Jeff Garzikcca39742006-08-24 03:19:22 -04007289 struct ata_host *host = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007290
Tejun Heob878ca52007-01-20 16:00:28 +09007291 ata_host_detach(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007292}
7293
7294/* move to PCI subsystem */
Jeff Garzik057ace52005-10-22 14:27:05 -04007295int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007296{
7297 unsigned long tmp = 0;
7298
7299 switch (bits->width) {
7300 case 1: {
7301 u8 tmp8 = 0;
7302 pci_read_config_byte(pdev, bits->reg, &tmp8);
7303 tmp = tmp8;
7304 break;
7305 }
7306 case 2: {
7307 u16 tmp16 = 0;
7308 pci_read_config_word(pdev, bits->reg, &tmp16);
7309 tmp = tmp16;
7310 break;
7311 }
7312 case 4: {
7313 u32 tmp32 = 0;
7314 pci_read_config_dword(pdev, bits->reg, &tmp32);
7315 tmp = tmp32;
7316 break;
7317 }
7318
7319 default:
7320 return -EINVAL;
7321 }
7322
7323 tmp &= bits->mask;
7324
7325 return (tmp == bits->val) ? 1 : 0;
7326}
Jens Axboe9b847542006-01-06 09:28:07 +01007327
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007328#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +09007329void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
Jens Axboe9b847542006-01-06 09:28:07 +01007330{
7331 pci_save_state(pdev);
Tejun Heo4c90d972007-02-20 18:14:48 +09007332 pci_disable_device(pdev);
Tejun Heo500530f2006-07-03 16:07:27 +09007333
Tejun Heo4c90d972007-02-20 18:14:48 +09007334 if (mesg.event == PM_EVENT_SUSPEND)
Tejun Heo500530f2006-07-03 16:07:27 +09007335 pci_set_power_state(pdev, PCI_D3hot);
Jens Axboe9b847542006-01-06 09:28:07 +01007336}
7337
Tejun Heo553c4aa2006-12-26 19:39:50 +09007338int ata_pci_device_do_resume(struct pci_dev *pdev)
Jens Axboe9b847542006-01-06 09:28:07 +01007339{
Tejun Heo553c4aa2006-12-26 19:39:50 +09007340 int rc;
7341
Jens Axboe9b847542006-01-06 09:28:07 +01007342 pci_set_power_state(pdev, PCI_D0);
7343 pci_restore_state(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09007344
Tejun Heob878ca52007-01-20 16:00:28 +09007345 rc = pcim_enable_device(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09007346 if (rc) {
7347 dev_printk(KERN_ERR, &pdev->dev,
7348 "failed to enable device after resume (%d)\n", rc);
7349 return rc;
7350 }
7351
Jens Axboe9b847542006-01-06 09:28:07 +01007352 pci_set_master(pdev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09007353 return 0;
Tejun Heo500530f2006-07-03 16:07:27 +09007354}
7355
Tejun Heo3c5100c2006-07-26 16:58:33 +09007356int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
Tejun Heo500530f2006-07-03 16:07:27 +09007357{
Jeff Garzikcca39742006-08-24 03:19:22 -04007358 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo500530f2006-07-03 16:07:27 +09007359 int rc = 0;
7360
Jeff Garzikcca39742006-08-24 03:19:22 -04007361 rc = ata_host_suspend(host, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09007362 if (rc)
7363 return rc;
7364
Tejun Heo3c5100c2006-07-26 16:58:33 +09007365 ata_pci_device_do_suspend(pdev, mesg);
Tejun Heo500530f2006-07-03 16:07:27 +09007366
7367 return 0;
7368}
7369
7370int ata_pci_device_resume(struct pci_dev *pdev)
7371{
Jeff Garzikcca39742006-08-24 03:19:22 -04007372 struct ata_host *host = dev_get_drvdata(&pdev->dev);
Tejun Heo553c4aa2006-12-26 19:39:50 +09007373 int rc;
Tejun Heo500530f2006-07-03 16:07:27 +09007374
Tejun Heo553c4aa2006-12-26 19:39:50 +09007375 rc = ata_pci_device_do_resume(pdev);
7376 if (rc == 0)
7377 ata_host_resume(host);
7378 return rc;
Jens Axboe9b847542006-01-06 09:28:07 +01007379}
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007380#endif /* CONFIG_PM */
7381
Linus Torvalds1da177e2005-04-16 15:20:36 -07007382#endif /* CONFIG_PCI */
7383
7384
Linus Torvalds1da177e2005-04-16 15:20:36 -07007385static int __init ata_init(void)
7386{
Andrew Mortona8601e52006-06-25 01:36:52 -07007387 ata_probe_timeout *= HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07007388 ata_wq = create_workqueue("ata");
7389 if (!ata_wq)
7390 return -ENOMEM;
7391
Tejun Heo453b07a2006-05-31 18:27:42 +09007392 ata_aux_wq = create_singlethread_workqueue("ata_aux");
7393 if (!ata_aux_wq) {
7394 destroy_workqueue(ata_wq);
7395 return -ENOMEM;
7396 }
7397
Linus Torvalds1da177e2005-04-16 15:20:36 -07007398 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
7399 return 0;
7400}
7401
7402static void __exit ata_exit(void)
7403{
7404 destroy_workqueue(ata_wq);
Tejun Heo453b07a2006-05-31 18:27:42 +09007405 destroy_workqueue(ata_aux_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007406}
7407
Brian Kinga4625082006-11-13 16:32:36 -06007408subsys_initcall(ata_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007409module_exit(ata_exit);
7410
Jeff Garzik67846b32005-10-05 02:58:32 -04007411static unsigned long ratelimit_time;
Ingo Molnar34af9462006-06-27 02:53:55 -07007412static DEFINE_SPINLOCK(ata_ratelimit_lock);
Jeff Garzik67846b32005-10-05 02:58:32 -04007413
7414int ata_ratelimit(void)
7415{
7416 int rc;
7417 unsigned long flags;
7418
7419 spin_lock_irqsave(&ata_ratelimit_lock, flags);
7420
7421 if (time_after(jiffies, ratelimit_time)) {
7422 rc = 1;
7423 ratelimit_time = jiffies + (HZ/5);
7424 } else
7425 rc = 0;
7426
7427 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
7428
7429 return rc;
7430}
7431
Tejun Heoc22daff2006-04-11 22:22:29 +09007432/**
7433 * ata_wait_register - wait until register value changes
7434 * @reg: IO-mapped register
7435 * @mask: Mask to apply to read register value
7436 * @val: Wait condition
7437 * @interval_msec: polling interval in milliseconds
7438 * @timeout_msec: timeout in milliseconds
7439 *
7440 * Waiting for some bits of register to change is a common
7441 * operation for ATA controllers. This function reads 32bit LE
7442 * IO-mapped register @reg and tests for the following condition.
7443 *
7444 * (*@reg & mask) != val
7445 *
7446 * If the condition is met, it returns; otherwise, the process is
7447 * repeated after @interval_msec until timeout.
7448 *
7449 * LOCKING:
7450 * Kernel thread context (may sleep)
7451 *
7452 * RETURNS:
7453 * The final register value.
7454 */
7455u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
7456 unsigned long interval_msec,
7457 unsigned long timeout_msec)
7458{
7459 unsigned long timeout;
7460 u32 tmp;
7461
7462 tmp = ioread32(reg);
7463
7464 /* Calculate timeout _after_ the first read to make sure
7465 * preceding writes reach the controller before starting to
7466 * eat away the timeout.
7467 */
7468 timeout = jiffies + (timeout_msec * HZ) / 1000;
7469
7470 while ((tmp & mask) == val && time_before(jiffies, timeout)) {
7471 msleep(interval_msec);
7472 tmp = ioread32(reg);
7473 }
7474
7475 return tmp;
7476}
7477
Linus Torvalds1da177e2005-04-16 15:20:36 -07007478/*
Tejun Heodd5b06c2006-08-10 16:59:12 +09007479 * Dummy port_ops
7480 */
7481static void ata_dummy_noret(struct ata_port *ap) { }
7482static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
7483static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
7484
7485static u8 ata_dummy_check_status(struct ata_port *ap)
7486{
7487 return ATA_DRDY;
7488}
7489
7490static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
7491{
7492 return AC_ERR_SYSTEM;
7493}
7494
7495const struct ata_port_operations ata_dummy_port_ops = {
Tejun Heodd5b06c2006-08-10 16:59:12 +09007496 .check_status = ata_dummy_check_status,
7497 .check_altstatus = ata_dummy_check_status,
7498 .dev_select = ata_noop_dev_select,
7499 .qc_prep = ata_noop_qc_prep,
7500 .qc_issue = ata_dummy_qc_issue,
7501 .freeze = ata_dummy_noret,
7502 .thaw = ata_dummy_noret,
7503 .error_handler = ata_dummy_noret,
7504 .post_internal_cmd = ata_dummy_qc_noret,
7505 .irq_clear = ata_dummy_noret,
7506 .port_start = ata_dummy_ret0,
7507 .port_stop = ata_dummy_noret,
7508};
7509
Tejun Heo21b0ad42007-04-17 23:44:07 +09007510const struct ata_port_info ata_dummy_port_info = {
7511 .port_ops = &ata_dummy_port_ops,
7512};
7513
Tejun Heodd5b06c2006-08-10 16:59:12 +09007514/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07007515 * libata is essentially a library of internal helper functions for
7516 * low-level ATA host controller drivers. As such, the API/ABI is
7517 * likely to change as new drivers are added and updated.
7518 * Do not depend on ABI/API stability.
7519 */
Tejun Heoe9c83912006-07-03 16:07:26 +09007520EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
7521EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
7522EXPORT_SYMBOL_GPL(sata_deb_timing_long);
Tejun Heodd5b06c2006-08-10 16:59:12 +09007523EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
Tejun Heo21b0ad42007-04-17 23:44:07 +09007524EXPORT_SYMBOL_GPL(ata_dummy_port_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007525EXPORT_SYMBOL_GPL(ata_std_bios_param);
7526EXPORT_SYMBOL_GPL(ata_std_ports);
Jeff Garzikcca39742006-08-24 03:19:22 -04007527EXPORT_SYMBOL_GPL(ata_host_init);
Tejun Heof3187192007-04-17 23:44:07 +09007528EXPORT_SYMBOL_GPL(ata_host_alloc);
Tejun Heof5cda252007-04-17 23:44:07 +09007529EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
Tejun Heoecef7252007-04-17 23:44:06 +09007530EXPORT_SYMBOL_GPL(ata_host_start);
Tejun Heof3187192007-04-17 23:44:07 +09007531EXPORT_SYMBOL_GPL(ata_host_register);
Tejun Heof5cda252007-04-17 23:44:07 +09007532EXPORT_SYMBOL_GPL(ata_host_activate);
Tejun Heo0529c152007-01-20 16:00:26 +09007533EXPORT_SYMBOL_GPL(ata_host_detach);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007534EXPORT_SYMBOL_GPL(ata_sg_init);
7535EXPORT_SYMBOL_GPL(ata_sg_init_one);
Tejun Heo9a1004d2006-05-31 18:27:52 +09007536EXPORT_SYMBOL_GPL(ata_hsm_move);
Tejun Heof686bcb2006-05-15 20:58:05 +09007537EXPORT_SYMBOL_GPL(ata_qc_complete);
Tejun Heodedaf2b2006-05-15 21:03:43 +09007538EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007539EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007540EXPORT_SYMBOL_GPL(ata_tf_load);
7541EXPORT_SYMBOL_GPL(ata_tf_read);
7542EXPORT_SYMBOL_GPL(ata_noop_dev_select);
7543EXPORT_SYMBOL_GPL(ata_std_dev_select);
Jeff Garzik43727fb2007-02-25 16:50:52 -05007544EXPORT_SYMBOL_GPL(sata_print_link_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007545EXPORT_SYMBOL_GPL(ata_tf_to_fis);
7546EXPORT_SYMBOL_GPL(ata_tf_from_fis);
Tejun Heo63573572007-11-27 19:43:39 +09007547EXPORT_SYMBOL_GPL(ata_pack_xfermask);
7548EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
7549EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
7550EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
7551EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
7552EXPORT_SYMBOL_GPL(ata_mode_string);
7553EXPORT_SYMBOL_GPL(ata_id_xfermask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007554EXPORT_SYMBOL_GPL(ata_check_status);
7555EXPORT_SYMBOL_GPL(ata_altstatus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007556EXPORT_SYMBOL_GPL(ata_exec_command);
7557EXPORT_SYMBOL_GPL(ata_port_start);
Alan Coxd92e74d2007-06-07 16:19:15 +01007558EXPORT_SYMBOL_GPL(ata_sff_port_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007559EXPORT_SYMBOL_GPL(ata_interrupt);
Alan04351822007-03-06 02:37:52 -08007560EXPORT_SYMBOL_GPL(ata_do_set_mode);
Tejun Heo0d5ff562007-02-01 15:06:36 +09007561EXPORT_SYMBOL_GPL(ata_data_xfer);
7562EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
Tejun Heo31cc23b2007-09-23 13:14:12 +09007563EXPORT_SYMBOL_GPL(ata_std_qc_defer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007564EXPORT_SYMBOL_GPL(ata_qc_prep);
Alan Coxd26fc952007-07-06 19:13:52 -04007565EXPORT_SYMBOL_GPL(ata_dumb_qc_prep);
Brian Kinge46834c2006-03-17 17:04:03 -06007566EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007567EXPORT_SYMBOL_GPL(ata_bmdma_setup);
7568EXPORT_SYMBOL_GPL(ata_bmdma_start);
7569EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
7570EXPORT_SYMBOL_GPL(ata_bmdma_status);
7571EXPORT_SYMBOL_GPL(ata_bmdma_stop);
Tejun Heo6d97dbd2006-05-15 20:58:24 +09007572EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
7573EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
7574EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
7575EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
7576EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007577EXPORT_SYMBOL_GPL(ata_port_probe);
Alan10305f02007-02-20 18:01:59 +00007578EXPORT_SYMBOL_GPL(ata_dev_disable);
Tejun Heo3c567b72006-05-15 20:57:23 +09007579EXPORT_SYMBOL_GPL(sata_set_spd);
Tejun Heo936fd732007-08-06 18:36:23 +09007580EXPORT_SYMBOL_GPL(sata_link_debounce);
7581EXPORT_SYMBOL_GPL(sata_link_resume);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007582EXPORT_SYMBOL_GPL(ata_bus_reset);
Tejun Heof5914a42006-05-31 18:27:48 +09007583EXPORT_SYMBOL_GPL(ata_std_prereset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09007584EXPORT_SYMBOL_GPL(ata_std_softreset);
Tejun Heocc0680a2007-08-06 18:36:23 +09007585EXPORT_SYMBOL_GPL(sata_link_hardreset);
Tejun Heoc2bd5802006-01-24 17:05:22 +09007586EXPORT_SYMBOL_GPL(sata_std_hardreset);
7587EXPORT_SYMBOL_GPL(ata_std_postreset);
Jeff Garzik2e9edbf2006-03-24 09:56:57 -05007588EXPORT_SYMBOL_GPL(ata_dev_classify);
7589EXPORT_SYMBOL_GPL(ata_dev_pair);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007590EXPORT_SYMBOL_GPL(ata_port_disable);
Jeff Garzik67846b32005-10-05 02:58:32 -04007591EXPORT_SYMBOL_GPL(ata_ratelimit);
Tejun Heoc22daff2006-04-11 22:22:29 +09007592EXPORT_SYMBOL_GPL(ata_wait_register);
Tejun Heo6f8b9952006-01-24 17:05:21 +09007593EXPORT_SYMBOL_GPL(ata_busy_sleep);
Tejun Heo88ff6ea2007-10-16 14:21:24 -07007594EXPORT_SYMBOL_GPL(ata_wait_after_reset);
Tejun Heod4b2bab2007-02-02 16:50:52 +09007595EXPORT_SYMBOL_GPL(ata_wait_ready);
Tejun Heo86e45b62006-03-05 15:29:09 +09007596EXPORT_SYMBOL_GPL(ata_port_queue_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007597EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
7598EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007599EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
Tejun Heo83c47bc2006-05-31 18:28:07 +09007600EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
Tejun Heoa6e6ce82006-05-15 21:03:48 +09007601EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007602EXPORT_SYMBOL_GPL(ata_host_intr);
Tejun Heo34bf2172006-05-15 20:57:46 +09007603EXPORT_SYMBOL_GPL(sata_scr_valid);
7604EXPORT_SYMBOL_GPL(sata_scr_read);
7605EXPORT_SYMBOL_GPL(sata_scr_write);
7606EXPORT_SYMBOL_GPL(sata_scr_write_flush);
Tejun Heo936fd732007-08-06 18:36:23 +09007607EXPORT_SYMBOL_GPL(ata_link_online);
7608EXPORT_SYMBOL_GPL(ata_link_offline);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007609#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -04007610EXPORT_SYMBOL_GPL(ata_host_suspend);
7611EXPORT_SYMBOL_GPL(ata_host_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007612#endif /* CONFIG_PM */
Tejun Heo6a62a042006-02-13 10:02:46 +09007613EXPORT_SYMBOL_GPL(ata_id_string);
7614EXPORT_SYMBOL_GPL(ata_id_c_string);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007615EXPORT_SYMBOL_GPL(ata_scsi_simulate);
7616
Alan Cox1bc4ccf2006-01-09 17:18:14 +00007617EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
Tejun Heo63573572007-11-27 19:43:39 +09007618EXPORT_SYMBOL_GPL(ata_timing_find_mode);
Alan Cox452503f2005-10-21 19:01:32 -04007619EXPORT_SYMBOL_GPL(ata_timing_compute);
7620EXPORT_SYMBOL_GPL(ata_timing_merge);
7621
Linus Torvalds1da177e2005-04-16 15:20:36 -07007622#ifdef CONFIG_PCI
7623EXPORT_SYMBOL_GPL(pci_test_config_bits);
Tejun Heod583bc12007-07-04 18:02:07 +09007624EXPORT_SYMBOL_GPL(ata_pci_init_sff_host);
Tejun Heo1626aeb2007-05-04 12:43:58 +02007625EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
Tejun Heod583bc12007-07-04 18:02:07 +09007626EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007627EXPORT_SYMBOL_GPL(ata_pci_init_one);
7628EXPORT_SYMBOL_GPL(ata_pci_remove_one);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007629#ifdef CONFIG_PM
Tejun Heo500530f2006-07-03 16:07:27 +09007630EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
7631EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
Jens Axboe9b847542006-01-06 09:28:07 +01007632EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
7633EXPORT_SYMBOL_GPL(ata_pci_device_resume);
Tejun Heo6ffa01d2007-03-02 17:32:47 +09007634#endif /* CONFIG_PM */
Alan Cox67951ad2006-03-22 15:55:54 +00007635EXPORT_SYMBOL_GPL(ata_pci_default_filter);
7636EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07007637#endif /* CONFIG_PCI */
Jens Axboe9b847542006-01-06 09:28:07 +01007638
Tejun Heo31f88382007-09-23 13:19:54 +09007639EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
Tejun Heo3af9a772007-09-23 13:19:54 +09007640EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
7641EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
7642EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
7643EXPORT_SYMBOL_GPL(sata_pmp_do_eh);
7644
Tejun Heob64bbc32007-07-16 14:29:39 +09007645EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
7646EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
7647EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
Tejun Heocbcdd872007-08-18 13:14:55 +09007648EXPORT_SYMBOL_GPL(ata_port_desc);
7649#ifdef CONFIG_PCI
7650EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
7651#endif /* CONFIG_PCI */
Tejun Heo7b70fc02006-05-15 20:58:07 +09007652EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
Tejun Heodbd82612007-08-06 18:36:23 +09007653EXPORT_SYMBOL_GPL(ata_link_abort);
Tejun Heo7b70fc02006-05-15 20:58:07 +09007654EXPORT_SYMBOL_GPL(ata_port_abort);
Tejun Heoe3180492006-05-15 20:58:09 +09007655EXPORT_SYMBOL_GPL(ata_port_freeze);
Tejun Heo7d77b242007-09-23 13:14:13 +09007656EXPORT_SYMBOL_GPL(sata_async_notification);
Tejun Heoe3180492006-05-15 20:58:09 +09007657EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
7658EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
Tejun Heoece1d632006-04-02 18:51:53 +09007659EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
7660EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
Tejun Heo022bdb02006-05-15 20:58:22 +09007661EXPORT_SYMBOL_GPL(ata_do_eh);
Akira Iguchi836250062007-01-26 16:27:32 +09007662EXPORT_SYMBOL_GPL(ata_irq_on);
Akira Iguchia619f981b2007-01-26 16:28:18 +09007663EXPORT_SYMBOL_GPL(ata_dev_try_classify);
Alan Coxbe0d18d2007-03-06 02:37:56 -08007664
7665EXPORT_SYMBOL_GPL(ata_cable_40wire);
7666EXPORT_SYMBOL_GPL(ata_cable_80wire);
7667EXPORT_SYMBOL_GPL(ata_cable_unknown);
7668EXPORT_SYMBOL_GPL(ata_cable_sata);