2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
36 #include <scsi/scsi_host.h>
39 * compile-time options: to be removed as soon as all the drivers are
40 * converted to the new debugging mechanism
42 #undef ATA_DEBUG /* debugging output */
43 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
44 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
45 #undef ATA_NDEBUG /* define to disable quick runtime checks */
46 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
47 * low-level drivers */
50 /* note: prints function name for you */
52 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
53 #ifdef ATA_VERBOSE_DEBUG
54 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
56 #define VPRINTK(fmt, args...)
57 #endif /* ATA_VERBOSE_DEBUG */
59 #define DPRINTK(fmt, args...)
60 #define VPRINTK(fmt, args...)
61 #endif /* ATA_DEBUG */
63 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65 /* NEW: debug levels */
66 #define HAVE_LIBATA_MSG 1
70 ATA_MSG_INFO = 0x0002,
71 ATA_MSG_PROBE = 0x0004,
72 ATA_MSG_WARN = 0x0008,
73 ATA_MSG_MALLOC = 0x0010,
75 ATA_MSG_INTR = 0x0040,
79 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
80 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
81 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
82 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
83 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
84 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
85 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
86 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
88 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
90 if (dval < 0 || dval >= (sizeof(u32) * 8))
91 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
94 return (1 << dval) - 1;
97 /* defines only for the constants which don't work well as enums */
98 #define ATA_TAG_POISON 0xfafbfcfdU
100 /* move to PCI layer? */
101 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
107 /* various global constants */
108 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
112 ATA_MAX_SECTORS = 200, /* FIXME */
113 ATA_MAX_SECTORS_LBA48 = 65535,
115 ATA_DEF_BUSY_WAIT = 10000,
116 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
118 ATA_SHT_EMULATED = 1,
119 ATA_SHT_CMD_PER_LUN = 1,
120 ATA_SHT_THIS_ID = -1,
121 ATA_SHT_USE_CLUSTERING = 1,
123 /* struct ata_device stuff */
124 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
125 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
126 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
128 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
130 ATA_DEV_UNKNOWN = 0, /* unknown device */
131 ATA_DEV_ATA = 1, /* ATA device */
132 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
133 ATA_DEV_ATAPI = 3, /* ATAPI device */
134 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
135 ATA_DEV_NONE = 5, /* no device */
137 /* struct ata_port flags */
138 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
139 /* (doesn't imply presence) */
140 ATA_FLAG_SATA = (1 << 1),
141 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
142 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
143 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
144 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
145 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
146 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
147 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
148 ATA_FLAG_IRQ_MASK = (1 << 9), /* Mask IRQ in PIO xfers */
150 ATA_FLAG_NOINTR = (1 << 16), /* FIXME: Remove this once
151 * proper HSM is in place. */
152 ATA_FLAG_DEBUGMSG = (1 << 17),
153 ATA_FLAG_FLUSH_PORT_TASK = (1 << 18), /* flush port task */
155 ATA_FLAG_DISABLED = (1 << 19), /* port is disabled, ignore it */
156 ATA_FLAG_SUSPENDED = (1 << 20), /* port is suspended */
158 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
160 /* struct ata_queued_cmd flags */
161 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
162 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
163 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
164 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
165 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
166 ATA_QCFLAG_EH_SCHEDULED = (1 << 4), /* EH scheduled */
169 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
171 /* various lengths of time */
172 ATA_TMOUT_PIO = 30 * HZ,
173 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
174 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
175 ATA_TMOUT_CDB = 30 * HZ,
176 ATA_TMOUT_CDB_QUICK = 5 * HZ,
177 ATA_TMOUT_INTERNAL = 30 * HZ,
178 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
192 /* SATA port states */
197 /* encoding various smaller bitmaps into a single
198 * unsigned int bitmap
205 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
206 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
208 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
209 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
210 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
212 /* size of buffer to pad xfers ending on unaligned boundaries */
214 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
216 /* masks for port functions */
217 ATA_PORT_PRIMARY = (1 << 0),
218 ATA_PORT_SECONDARY = (1 << 1),
220 /* how hard are we gonna try to probe/recover devices */
221 ATA_PROBE_MAX_TRIES = 3,
224 enum hsm_task_states {
235 enum ata_completion_errors {
236 AC_ERR_DEV = (1 << 0), /* device reported error */
237 AC_ERR_HSM = (1 << 1), /* host state machine violation */
238 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
239 AC_ERR_MEDIA = (1 << 3), /* media error */
240 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
241 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
242 AC_ERR_SYSTEM = (1 << 6), /* system error */
243 AC_ERR_INVALID = (1 << 7), /* invalid argument */
244 AC_ERR_OTHER = (1 << 8), /* unknown */
247 /* forward declarations */
249 struct ata_port_operations;
251 struct ata_queued_cmd;
254 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
255 typedef void (*ata_probeinit_fn_t)(struct ata_port *);
256 typedef int (*ata_reset_fn_t)(struct ata_port *, unsigned int *);
257 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
260 unsigned long cmd_addr;
261 unsigned long data_addr;
262 unsigned long error_addr;
263 unsigned long feature_addr;
264 unsigned long nsect_addr;
265 unsigned long lbal_addr;
266 unsigned long lbam_addr;
267 unsigned long lbah_addr;
268 unsigned long device_addr;
269 unsigned long status_addr;
270 unsigned long command_addr;
271 unsigned long altstatus_addr;
272 unsigned long ctl_addr;
273 unsigned long bmdma_addr;
274 unsigned long scr_addr;
277 struct ata_probe_ent {
278 struct list_head node;
280 const struct ata_port_operations *port_ops;
281 struct scsi_host_template *sht;
282 struct ata_ioports port[ATA_MAX_PORTS];
283 unsigned int n_ports;
284 unsigned int hard_port_no;
285 unsigned int pio_mask;
286 unsigned int mwdma_mask;
287 unsigned int udma_mask;
288 unsigned int legacy_mode;
290 unsigned int irq_flags;
291 unsigned long host_flags;
292 unsigned long host_set_flags;
293 void __iomem *mmio_base;
297 struct ata_host_set {
301 void __iomem *mmio_base;
302 unsigned int n_ports;
304 const struct ata_port_operations *ops;
306 int simplex_claimed; /* Keep seperate in case we
307 ever need to do this locked */
308 struct ata_port * ports[0];
311 struct ata_queued_cmd {
313 struct ata_device *dev;
315 struct scsi_cmnd *scsicmd;
316 void (*scsidone)(struct scsi_cmnd *);
318 struct ata_taskfile tf;
319 u8 cdb[ATAPI_CDB_LEN];
321 unsigned long flags; /* ATA_QCFLAG_xxx */
324 unsigned int orig_n_elem;
328 unsigned int pad_len;
331 unsigned int cursect;
334 unsigned int curbytes;
337 unsigned int cursg_ofs;
339 struct scatterlist sgent;
340 struct scatterlist pad_sgent;
343 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
344 struct scatterlist *__sg;
346 unsigned int err_mask;
348 ata_qc_cb_t complete_fn;
353 struct ata_host_stats {
354 unsigned long unhandled_irq;
355 unsigned long idle_irq;
356 unsigned long rw_reqbuf;
360 u64 n_sectors; /* size of device, if ATA */
361 unsigned long flags; /* ATA_DFLAG_xxx */
362 unsigned int class; /* ATA_DEV_xxx */
363 unsigned int devno; /* 0 or 1 */
364 u16 *id; /* IDENTIFY xxx DEVICE data */
368 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
370 unsigned int multi_count; /* sectors count for
371 READ/WRITE MULTIPLE */
372 unsigned int max_sectors; /* per-device max sectors */
373 unsigned int cdb_len;
375 /* per-dev xfer mask */
376 unsigned int pio_mask;
377 unsigned int mwdma_mask;
378 unsigned int udma_mask;
380 /* for CHS addressing */
381 u16 cylinders; /* Number of cylinders */
382 u16 heads; /* Number of heads */
383 u16 sectors; /* Number of sectors per track */
387 struct Scsi_Host *host; /* our co-allocated scsi host */
388 const struct ata_port_operations *ops;
389 unsigned long flags; /* ATA_FLAG_xxx */
390 unsigned int id; /* unique id req'd by scsi midlyr */
391 unsigned int port_no; /* unique port #; from zero */
392 unsigned int hard_port_no; /* hardware port #; from zero */
394 struct ata_prd *prd; /* our SG list */
395 dma_addr_t prd_dma; /* and its DMA mapping */
397 void *pad; /* array of DMA pad buffers */
400 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
402 u8 ctl; /* cache of ATA control register */
403 u8 last_ctl; /* Cache last written value */
404 unsigned int pio_mask;
405 unsigned int mwdma_mask;
406 unsigned int udma_mask;
407 unsigned int cbl; /* cable type; ATA_CBL_xxx */
408 unsigned int sata_spd_limit; /* SATA PHY speed limit */
410 struct ata_device device[ATA_MAX_DEVICES];
412 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
413 unsigned long qactive;
414 unsigned int active_tag;
416 struct ata_host_stats stats;
417 struct ata_host_set *host_set;
420 struct work_struct port_task;
422 unsigned int hsm_task_state;
423 unsigned long pio_task_timeout;
426 struct list_head eh_done_q;
431 struct ata_port_operations {
432 void (*port_disable) (struct ata_port *);
434 void (*dev_config) (struct ata_port *, struct ata_device *);
436 void (*set_piomode) (struct ata_port *, struct ata_device *);
437 void (*set_dmamode) (struct ata_port *, struct ata_device *);
438 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
440 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
441 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
443 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
444 u8 (*check_status)(struct ata_port *ap);
445 u8 (*check_altstatus)(struct ata_port *ap);
446 void (*dev_select)(struct ata_port *ap, unsigned int device);
448 void (*phy_reset) (struct ata_port *ap); /* obsolete */
449 void (*set_mode) (struct ata_port *ap);
450 int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
452 void (*post_set_mode) (struct ata_port *ap);
454 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
456 void (*bmdma_setup) (struct ata_queued_cmd *qc);
457 void (*bmdma_start) (struct ata_queued_cmd *qc);
459 void (*qc_prep) (struct ata_queued_cmd *qc);
460 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
462 void (*eng_timeout) (struct ata_port *ap);
464 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
465 void (*irq_clear) (struct ata_port *);
467 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
468 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
471 int (*port_start) (struct ata_port *ap);
472 void (*port_stop) (struct ata_port *ap);
474 void (*host_stop) (struct ata_host_set *host_set);
476 void (*bmdma_stop) (struct ata_queued_cmd *qc);
477 u8 (*bmdma_status) (struct ata_port *ap);
480 struct ata_port_info {
481 struct scsi_host_template *sht;
482 unsigned long host_flags;
483 unsigned long pio_mask;
484 unsigned long mwdma_mask;
485 unsigned long udma_mask;
486 const struct ata_port_operations *port_ops;
491 unsigned short mode; /* ATA mode */
492 unsigned short setup; /* t1 */
493 unsigned short act8b; /* t2 for 8-bit I/O */
494 unsigned short rec8b; /* t2i for 8-bit I/O */
495 unsigned short cyc8b; /* t0 for 8-bit I/O */
496 unsigned short active; /* t2 or tD */
497 unsigned short recover; /* t2i or tK */
498 unsigned short cycle; /* t0 */
499 unsigned short udma; /* t2CYCTYP/2 */
502 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
504 extern void ata_port_probe(struct ata_port *);
505 extern void __sata_phy_reset(struct ata_port *ap);
506 extern void sata_phy_reset(struct ata_port *ap);
507 extern void ata_bus_reset(struct ata_port *ap);
508 extern int ata_set_sata_spd(struct ata_port *ap);
509 extern int ata_drive_probe_reset(struct ata_port *ap,
510 ata_probeinit_fn_t probeinit,
511 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
512 ata_postreset_fn_t postreset, unsigned int *classes);
513 extern void ata_std_probeinit(struct ata_port *ap);
514 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
515 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
516 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
517 extern int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
519 extern void ata_port_disable(struct ata_port *);
520 extern void ata_std_ports(struct ata_ioports *ioaddr);
522 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
523 unsigned int n_ports);
524 extern void ata_pci_remove_one (struct pci_dev *pdev);
525 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
526 extern int ata_pci_device_resume(struct pci_dev *pdev);
527 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
528 #endif /* CONFIG_PCI */
529 extern int ata_device_add(const struct ata_probe_ent *ent);
530 extern void ata_host_set_remove(struct ata_host_set *host_set);
531 extern int ata_scsi_detect(struct scsi_host_template *sht);
532 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
533 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
534 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
535 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
536 extern int ata_scsi_release(struct Scsi_Host *host);
537 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
538 extern int ata_scsi_device_resume(struct scsi_device *);
539 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
540 extern int ata_device_resume(struct ata_port *, struct ata_device *);
541 extern int ata_device_suspend(struct ata_port *, struct ata_device *, pm_message_t state);
542 extern int ata_ratelimit(void);
543 extern unsigned int ata_busy_sleep(struct ata_port *ap,
544 unsigned long timeout_pat,
545 unsigned long timeout);
546 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
547 void *data, unsigned long delay);
548 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
549 unsigned long interval_msec,
550 unsigned long timeout_msec);
553 * Default driver ops implementations
555 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
556 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
557 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
558 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
559 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
560 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
561 extern u8 ata_check_status(struct ata_port *ap);
562 extern u8 ata_altstatus(struct ata_port *ap);
563 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
564 extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes);
565 extern int ata_port_start (struct ata_port *ap);
566 extern void ata_port_stop (struct ata_port *ap);
567 extern void ata_host_stop (struct ata_host_set *host_set);
568 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
569 extern void ata_qc_prep(struct ata_queued_cmd *qc);
570 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
571 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
572 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
573 unsigned int buflen);
574 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
575 unsigned int n_elem);
576 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
577 extern void ata_id_string(const u16 *id, unsigned char *s,
578 unsigned int ofs, unsigned int len);
579 extern void ata_id_c_string(const u16 *id, unsigned char *s,
580 unsigned int ofs, unsigned int len);
581 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
582 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
583 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
584 extern u8 ata_bmdma_status(struct ata_port *ap);
585 extern void ata_bmdma_irq_clear(struct ata_port *ap);
586 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
587 extern void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
588 struct scsi_cmnd *cmd,
589 void (*done)(struct scsi_cmnd *));
590 extern int ata_std_bios_param(struct scsi_device *sdev,
591 struct block_device *bdev,
592 sector_t capacity, int geom[]);
593 extern int ata_scsi_slave_config(struct scsi_device *sdev);
594 extern struct ata_device *ata_dev_pair(struct ata_port *ap,
595 struct ata_device *adev);
601 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
602 extern int ata_timing_compute(struct ata_device *, unsigned short,
603 struct ata_timing *, int, int);
604 extern void ata_timing_merge(const struct ata_timing *,
605 const struct ata_timing *, struct ata_timing *,
609 ATA_TIMING_SETUP = (1 << 0),
610 ATA_TIMING_ACT8B = (1 << 1),
611 ATA_TIMING_REC8B = (1 << 2),
612 ATA_TIMING_CYC8B = (1 << 3),
613 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
615 ATA_TIMING_ACTIVE = (1 << 4),
616 ATA_TIMING_RECOVER = (1 << 5),
617 ATA_TIMING_CYCLE = (1 << 6),
618 ATA_TIMING_UDMA = (1 << 7),
619 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
620 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
621 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
622 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
628 unsigned int reg; /* PCI config register to read */
629 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
634 extern void ata_pci_host_stop (struct ata_host_set *host_set);
635 extern struct ata_probe_ent *
636 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
637 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
638 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
639 #endif /* CONFIG_PCI */
644 extern void ata_eng_timeout(struct ata_port *ap);
645 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
646 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
650 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
652 if (sg == &qc->pad_sgent)
656 if (((sg - qc->__sg) + 1) == qc->n_elem)
661 static inline struct scatterlist *
662 ata_qc_first_sg(struct ata_queued_cmd *qc)
667 return &qc->pad_sgent;
671 static inline struct scatterlist *
672 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
674 if (sg == &qc->pad_sgent)
676 if (++sg - qc->__sg < qc->n_elem)
679 return &qc->pad_sgent;
683 #define ata_for_each_sg(sg, qc) \
684 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
686 static inline unsigned int ata_tag_valid(unsigned int tag)
688 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
691 static inline unsigned int ata_class_enabled(unsigned int class)
693 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
696 static inline unsigned int ata_class_disabled(unsigned int class)
698 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
701 static inline unsigned int ata_class_absent(unsigned int class)
703 return !ata_class_enabled(class) && !ata_class_disabled(class);
706 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
708 return ata_class_enabled(dev->class);
711 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
713 return ata_class_disabled(dev->class);
716 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
718 return ata_class_absent(dev->class);
721 static inline u8 ata_chk_status(struct ata_port *ap)
723 return ap->ops->check_status(ap);
728 * ata_pause - Flush writes and pause 400 nanoseconds.
729 * @ap: Port to wait for.
732 * Inherited from caller.
735 static inline void ata_pause(struct ata_port *ap)
743 * ata_busy_wait - Wait for a port status register
744 * @ap: Port to wait for.
746 * Waits up to max*10 microseconds for the selected bits in the port's
747 * status register to be cleared.
748 * Returns final value of status register.
751 * Inherited from caller.
754 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
761 status = ata_chk_status(ap);
763 } while ((status & bits) && (max > 0));
770 * ata_wait_idle - Wait for a port to be idle.
771 * @ap: Port to wait for.
773 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
774 * Returns final value of status register.
777 * Inherited from caller.
780 static inline u8 ata_wait_idle(struct ata_port *ap)
782 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
784 if (status & (ATA_BUSY | ATA_DRQ)) {
785 unsigned long l = ap->ioaddr.status_addr;
786 if (ata_msg_warn(ap))
787 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
794 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
796 qc->tf.ctl |= ATA_NIEN;
799 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
802 if (likely(ata_tag_valid(tag)))
803 return &ap->qcmd[tag];
807 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
809 memset(tf, 0, sizeof(*tf));
813 tf->device = ATA_DEVICE_OBS;
815 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
818 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
822 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
824 qc->nbytes = qc->curbytes = 0;
827 ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
831 * ata_qc_complete - Complete an active ATA command
832 * @qc: Command to complete
833 * @err_mask: ATA Status register contents
835 * Indicate to the mid and upper layers that an ATA
836 * command has completed, with either an ok or not-ok status.
839 * spin_lock_irqsave(host_set lock)
841 static inline void ata_qc_complete(struct ata_queued_cmd *qc)
843 if (unlikely(qc->flags & ATA_QCFLAG_EH_SCHEDULED))
846 __ata_qc_complete(qc);
850 * ata_irq_on - Enable interrupts on a port.
851 * @ap: Port on which interrupts are enabled.
853 * Enable interrupts on a legacy IDE device using MMIO or PIO,
854 * wait for idle, clear any pending interrupts.
857 * Inherited from caller.
860 static inline u8 ata_irq_on(struct ata_port *ap)
862 struct ata_ioports *ioaddr = &ap->ioaddr;
865 ap->ctl &= ~ATA_NIEN;
866 ap->last_ctl = ap->ctl;
868 if (ap->flags & ATA_FLAG_MMIO)
869 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
871 outb(ap->ctl, ioaddr->ctl_addr);
872 tmp = ata_wait_idle(ap);
874 ap->ops->irq_clear(ap);
881 * ata_irq_ack - Acknowledge a device interrupt.
882 * @ap: Port on which interrupts are enabled.
884 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
885 * or BUSY+DRQ clear). Obtain dma status and port status from
886 * device. Clear the interrupt. Return port status.
891 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
893 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
894 u8 host_stat, post_stat, status;
896 status = ata_busy_wait(ap, bits, 1000);
899 printk(KERN_ERR "abnormal status 0x%X\n", status);
901 /* get controller status; clear intr, err bits */
902 if (ap->flags & ATA_FLAG_MMIO) {
903 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
904 host_stat = readb(mmio + ATA_DMA_STATUS);
905 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
906 mmio + ATA_DMA_STATUS);
908 post_stat = readb(mmio + ATA_DMA_STATUS);
910 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
911 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
912 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
914 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
917 if (ata_msg_intr(ap))
918 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
920 host_stat, post_stat, status);
925 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
927 return ap->ops->scr_read(ap, reg);
930 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
932 ap->ops->scr_write(ap, reg, val);
935 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
938 ap->ops->scr_write(ap, reg, val);
939 (void) ap->ops->scr_read(ap, reg);
942 static inline unsigned int sata_dev_present(struct ata_port *ap)
944 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
947 static inline int ata_try_flush_cache(const struct ata_device *dev)
949 return ata_id_wcache_enabled(dev->id) ||
950 ata_id_has_flush(dev->id) ||
951 ata_id_has_flush_ext(dev->id);
954 static inline unsigned int ac_err_mask(u8 status)
956 if (status & ATA_BUSY)
958 if (status & (ATA_ERR | ATA_DF))
963 static inline unsigned int __ac_err_mask(u8 status)
965 unsigned int mask = ac_err_mask(status);
971 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
974 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
975 &ap->pad_dma, GFP_KERNEL);
976 return (ap->pad == NULL) ? -ENOMEM : 0;
979 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
981 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
984 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
986 return (struct ata_port *) &host->hostdata[0];
989 #endif /* __LINUX_LIBATA_H__ */