ide: don't enable IORDY at a probe time
[linux-2.6.git] / drivers / ide / ide-taskfile.c
1 /*
2  *  Copyright (C) 2000-2002        Michael Cornwell <cornwell@acm.org>
3  *  Copyright (C) 2000-2002        Andre Hedrick <andre@linux-ide.org>
4  *  Copyright (C) 2001-2002        Klaus Smolin
5  *                                      IBM Storage Technology Division
6  *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
7  *
8  *  The big the bad and the ugly.
9  */
10
11 #include <linux/types.h>
12 #include <linux/string.h>
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/interrupt.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/hdreg.h>
20 #include <linux/ide.h>
21 #include <linux/scatterlist.h>
22
23 #include <asm/uaccess.h>
24 #include <asm/io.h>
25
26 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
27 {
28         ide_hwif_t *hwif = drive->hwif;
29         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
30
31         /* Be sure we're looking at the low order bytes */
32         tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
33
34         tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
35
36         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
37                 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
38
39                 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
40         }
41 }
42
43 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
44 {
45 #ifdef DEBUG
46         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
47                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
48                s, cmd->tf.feature, cmd->tf.nsect,
49                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
50                cmd->tf.device, cmd->tf.command);
51         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
52                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
53 #endif
54 }
55
56 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
57 {
58         struct ide_cmd cmd;
59
60         memset(&cmd, 0, sizeof(cmd));
61         cmd.tf.nsect = 0x01;
62         if (drive->media == ide_disk)
63                 cmd.tf.command = ATA_CMD_ID_ATA;
64         else
65                 cmd.tf.command = ATA_CMD_ID_ATAPI;
66         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
67         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
68         cmd.protocol = ATA_PROT_PIO;
69
70         return ide_raw_taskfile(drive, &cmd, buf, 1);
71 }
72
73 static ide_startstop_t task_no_data_intr(ide_drive_t *);
74 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
75 static ide_startstop_t task_pio_intr(ide_drive_t *);
76
77 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
78 {
79         ide_hwif_t *hwif = drive->hwif;
80         struct ide_cmd *cmd = &hwif->cmd;
81         struct ide_taskfile *tf = &cmd->tf;
82         ide_handler_t *handler = NULL;
83         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
84         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
85
86         if (orig_cmd->protocol == ATA_PROT_PIO &&
87             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
88             drive->mult_count == 0) {
89                 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
90                 return ide_stopped;
91         }
92
93         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
94                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
95
96         memcpy(cmd, orig_cmd, sizeof(*cmd));
97
98         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
99                 ide_tf_dump(drive->name, cmd);
100                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
101
102                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
103                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
104
105                         tp_ops->output_data(drive, cmd, data, 2);
106                 }
107
108                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
109                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
110                                   0xE0 : 0xEF;
111
112                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
113                                 cmd->tf.device &= HIHI;
114                         cmd->tf.device |= drive->select;
115                 }
116
117                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
118                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
119         }
120
121         switch (cmd->protocol) {
122         case ATA_PROT_PIO:
123                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
124                         tp_ops->exec_command(hwif, tf->command);
125                         ndelay(400);    /* FIXME */
126                         return pre_task_out_intr(drive, cmd);
127                 }
128                 handler = task_pio_intr;
129                 /* fall-through */
130         case ATA_PROT_NODATA:
131                 if (handler == NULL)
132                         handler = task_no_data_intr;
133                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
134                 return ide_started;
135         case ATA_PROT_DMA:
136                 if (ide_dma_prepare(drive, cmd))
137                         return ide_stopped;
138                 hwif->expiry = dma_ops->dma_timer_expiry;
139                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
140                 dma_ops->dma_start(drive);
141         default:
142                 return ide_started;
143         }
144 }
145 EXPORT_SYMBOL_GPL(do_rw_taskfile);
146
147 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
148 {
149         ide_hwif_t *hwif = drive->hwif;
150         struct ide_cmd *cmd = &hwif->cmd;
151         struct ide_taskfile *tf = &cmd->tf;
152         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
153         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
154         u8 stat;
155
156         local_irq_enable_in_hardirq();
157
158         while (1) {
159                 stat = hwif->tp_ops->read_status(hwif);
160                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
161                         break;
162                 udelay(10);
163         };
164
165         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
166                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
167                         drive->mult_req = drive->mult_count = 0;
168                         drive->special_flags |= IDE_SFLAG_RECALIBRATE;
169                         (void)ide_dump_status(drive, __func__, stat);
170                         return ide_stopped;
171                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
172                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
173                                 ide_set_handler(drive, &task_no_data_intr,
174                                                 WAIT_WORSTCASE);
175                                 return ide_started;
176                         }
177                 }
178                 return ide_error(drive, "task_no_data_intr", stat);
179         }
180
181         if (custom && tf->command == ATA_CMD_SET_MULTI)
182                 drive->mult_count = drive->mult_req;
183
184         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
185             tf->command == ATA_CMD_CHK_POWER) {
186                 struct request *rq = hwif->rq;
187
188                 if (blk_pm_request(rq))
189                         ide_complete_pm_rq(drive, rq);
190                 else
191                         ide_finish_cmd(drive, cmd, stat);
192         }
193
194         return ide_stopped;
195 }
196
197 static u8 wait_drive_not_busy(ide_drive_t *drive)
198 {
199         ide_hwif_t *hwif = drive->hwif;
200         int retries;
201         u8 stat;
202
203         /*
204          * Last sector was transfered, wait until device is ready.  This can
205          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
206          */
207         for (retries = 0; retries < 1000; retries++) {
208                 stat = hwif->tp_ops->read_status(hwif);
209
210                 if (stat & ATA_BUSY)
211                         udelay(10);
212                 else
213                         break;
214         }
215
216         if (stat & ATA_BUSY)
217                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
218
219         return stat;
220 }
221
222 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
223                    unsigned int write, unsigned int len)
224 {
225         ide_hwif_t *hwif = drive->hwif;
226         struct scatterlist *sg = hwif->sg_table;
227         struct scatterlist *cursg = cmd->cursg;
228         struct page *page;
229         unsigned long flags;
230         unsigned int offset;
231         u8 *buf;
232
233         cursg = cmd->cursg;
234         if (cursg == NULL)
235                 cursg = cmd->cursg = sg;
236
237         while (len) {
238                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
239
240                 if (nr_bytes > PAGE_SIZE)
241                         nr_bytes = PAGE_SIZE;
242
243                 page = sg_page(cursg);
244                 offset = cursg->offset + cmd->cursg_ofs;
245
246                 /* get the current page and offset */
247                 page = nth_page(page, (offset >> PAGE_SHIFT));
248                 offset %= PAGE_SIZE;
249
250                 if (PageHighMem(page))
251                         local_irq_save(flags);
252
253                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
254
255                 cmd->nleft -= nr_bytes;
256                 cmd->cursg_ofs += nr_bytes;
257
258                 if (cmd->cursg_ofs == cursg->length) {
259                         cursg = cmd->cursg = sg_next(cmd->cursg);
260                         cmd->cursg_ofs = 0;
261                 }
262
263                 /* do the actual data transfer */
264                 if (write)
265                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
266                 else
267                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
268
269                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
270
271                 if (PageHighMem(page))
272                         local_irq_restore(flags);
273
274                 len -= nr_bytes;
275         }
276 }
277 EXPORT_SYMBOL_GPL(ide_pio_bytes);
278
279 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
280                               unsigned int write)
281 {
282         unsigned int nr_bytes;
283
284         u8 saved_io_32bit = drive->io_32bit;
285
286         if (cmd->tf_flags & IDE_TFLAG_FS)
287                 cmd->rq->errors = 0;
288
289         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
290                 drive->io_32bit = 0;
291
292         touch_softlockup_watchdog();
293
294         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
295                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
296         else
297                 nr_bytes = SECTOR_SIZE;
298
299         ide_pio_bytes(drive, cmd, write, nr_bytes);
300
301         drive->io_32bit = saved_io_32bit;
302 }
303
304 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
305 {
306         if (cmd->tf_flags & IDE_TFLAG_FS) {
307                 int nr_bytes = cmd->nbytes - cmd->nleft;
308
309                 if (cmd->protocol == ATA_PROT_PIO &&
310                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
311                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
312                                 nr_bytes -= drive->mult_count << 9;
313                         else
314                                 nr_bytes -= SECTOR_SIZE;
315                 }
316
317                 if (nr_bytes > 0)
318                         ide_complete_rq(drive, 0, nr_bytes);
319         }
320 }
321
322 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
323 {
324         struct request *rq = drive->hwif->rq;
325         u8 err = ide_read_error(drive);
326
327         ide_complete_cmd(drive, cmd, stat, err);
328         rq->errors = err;
329         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
330 }
331
332 /*
333  * Handler for command with PIO data phase.
334  */
335 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
336 {
337         ide_hwif_t *hwif = drive->hwif;
338         struct ide_cmd *cmd = &drive->hwif->cmd;
339         u8 stat = hwif->tp_ops->read_status(hwif);
340         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
341
342         if (write == 0) {
343                 /* Error? */
344                 if (stat & ATA_ERR)
345                         goto out_err;
346
347                 /* Didn't want any data? Odd. */
348                 if ((stat & ATA_DRQ) == 0) {
349                         /* Command all done? */
350                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
351                                 goto out_end;
352
353                         /* Assume it was a spurious irq */
354                         goto out_wait;
355                 }
356         } else {
357                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
358                         goto out_err;
359
360                 /* Deal with unexpected ATA data phase. */
361                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
362                         goto out_err;
363         }
364
365         if (write && cmd->nleft == 0)
366                 goto out_end;
367
368         /* Still data left to transfer. */
369         ide_pio_datablock(drive, cmd, write);
370
371         /* Are we done? Check status and finish transfer. */
372         if (write == 0 && cmd->nleft == 0) {
373                 stat = wait_drive_not_busy(drive);
374                 if (!OK_STAT(stat, 0, BAD_STAT))
375                         goto out_err;
376
377                 goto out_end;
378         }
379 out_wait:
380         /* Still data left to transfer. */
381         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
382         return ide_started;
383 out_end:
384         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
385                 ide_finish_cmd(drive, cmd, stat);
386         else
387                 ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
388         return ide_stopped;
389 out_err:
390         ide_error_cmd(drive, cmd);
391         return ide_error(drive, __func__, stat);
392 }
393
394 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
395                                          struct ide_cmd *cmd)
396 {
397         ide_startstop_t startstop;
398
399         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
400                           drive->bad_wstat, WAIT_DRQ)) {
401                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
402                         drive->name,
403                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
404                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
405                 return startstop;
406         }
407
408         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
409                 local_irq_disable();
410
411         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
412
413         ide_pio_datablock(drive, cmd, 1);
414
415         return ide_started;
416 }
417
418 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
419                      u16 nsect)
420 {
421         struct request *rq;
422         int error;
423
424         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
425         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
426
427         if (cmd->tf_flags & IDE_TFLAG_WRITE)
428                 rq->cmd_flags |= REQ_RW;
429
430         /*
431          * (ks) We transfer currently only whole sectors.
432          * This is suffient for now.  But, it would be great,
433          * if we would find a solution to transfer any size.
434          * To support special commands like READ LONG.
435          */
436         if (nsect) {
437                 error = blk_rq_map_kern(drive->queue, rq, buf,
438                                         nsect * SECTOR_SIZE, __GFP_WAIT);
439                 if (error)
440                         goto put_req;
441         }
442
443         rq->special = cmd;
444         cmd->rq = rq;
445
446         error = blk_execute_rq(drive->queue, NULL, rq, 0);
447
448 put_req:
449         blk_put_request(rq);
450         return error;
451 }
452
453 EXPORT_SYMBOL(ide_raw_taskfile);
454
455 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
456 {
457         cmd->protocol = ATA_PROT_NODATA;
458
459         return ide_raw_taskfile(drive, cmd, NULL, 0);
460 }
461 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
462
463 #ifdef CONFIG_IDE_TASK_IOCTL
464 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
465 {
466         ide_task_request_t      *req_task;
467         struct ide_cmd          cmd;
468         u8 *outbuf              = NULL;
469         u8 *inbuf               = NULL;
470         u8 *data_buf            = NULL;
471         int err                 = 0;
472         int tasksize            = sizeof(struct ide_task_request_s);
473         unsigned int taskin     = 0;
474         unsigned int taskout    = 0;
475         u16 nsect               = 0;
476         char __user *buf = (char __user *)arg;
477
478 //      printk("IDE Taskfile ...\n");
479
480         req_task = kzalloc(tasksize, GFP_KERNEL);
481         if (req_task == NULL) return -ENOMEM;
482         if (copy_from_user(req_task, buf, tasksize)) {
483                 kfree(req_task);
484                 return -EFAULT;
485         }
486
487         taskout = req_task->out_size;
488         taskin  = req_task->in_size;
489         
490         if (taskin > 65536 || taskout > 65536) {
491                 err = -EINVAL;
492                 goto abort;
493         }
494
495         if (taskout) {
496                 int outtotal = tasksize;
497                 outbuf = kzalloc(taskout, GFP_KERNEL);
498                 if (outbuf == NULL) {
499                         err = -ENOMEM;
500                         goto abort;
501                 }
502                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
503                         err = -EFAULT;
504                         goto abort;
505                 }
506         }
507
508         if (taskin) {
509                 int intotal = tasksize + taskout;
510                 inbuf = kzalloc(taskin, GFP_KERNEL);
511                 if (inbuf == NULL) {
512                         err = -ENOMEM;
513                         goto abort;
514                 }
515                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
516                         err = -EFAULT;
517                         goto abort;
518                 }
519         }
520
521         memset(&cmd, 0, sizeof(cmd));
522
523         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
524         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
525
526         cmd.valid.out.tf = IDE_VALID_DEVICE;
527         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
528         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
529
530         if (drive->dev_flags & IDE_DFLAG_LBA48) {
531                 cmd.tf_flags |= IDE_TFLAG_LBA48;
532                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
533         }
534
535         if (req_task->out_flags.all) {
536                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
537
538                 if (req_task->out_flags.b.data)
539                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
540
541                 if (req_task->out_flags.b.nsector_hob)
542                         cmd.valid.out.hob |= IDE_VALID_NSECT;
543                 if (req_task->out_flags.b.sector_hob)
544                         cmd.valid.out.hob |= IDE_VALID_LBAL;
545                 if (req_task->out_flags.b.lcyl_hob)
546                         cmd.valid.out.hob |= IDE_VALID_LBAM;
547                 if (req_task->out_flags.b.hcyl_hob)
548                         cmd.valid.out.hob |= IDE_VALID_LBAH;
549
550                 if (req_task->out_flags.b.error_feature)
551                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
552                 if (req_task->out_flags.b.nsector)
553                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
554                 if (req_task->out_flags.b.sector)
555                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
556                 if (req_task->out_flags.b.lcyl)
557                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
558                 if (req_task->out_flags.b.hcyl)
559                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
560         } else {
561                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
562                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
563                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
564         }
565
566         if (req_task->in_flags.b.data)
567                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
568
569         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
570                 /* fixup data phase if needed */
571                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
572                     req_task->data_phase == TASKFILE_IN_DMA)
573                         cmd.tf_flags |= IDE_TFLAG_WRITE;
574         }
575
576         cmd.protocol = ATA_PROT_DMA;
577
578         switch (req_task->data_phase) {
579                 case TASKFILE_MULTI_OUT:
580                         if (!drive->mult_count) {
581                                 /* (hs): give up if multcount is not set */
582                                 printk(KERN_ERR "%s: %s Multimode Write " \
583                                         "multcount is not set\n",
584                                         drive->name, __func__);
585                                 err = -EPERM;
586                                 goto abort;
587                         }
588                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
589                         /* fall through */
590                 case TASKFILE_OUT:
591                         cmd.protocol = ATA_PROT_PIO;
592                         /* fall through */
593                 case TASKFILE_OUT_DMAQ:
594                 case TASKFILE_OUT_DMA:
595                         cmd.tf_flags |= IDE_TFLAG_WRITE;
596                         nsect = taskout / SECTOR_SIZE;
597                         data_buf = outbuf;
598                         break;
599                 case TASKFILE_MULTI_IN:
600                         if (!drive->mult_count) {
601                                 /* (hs): give up if multcount is not set */
602                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
603                                         "multcount is not set\n",
604                                         drive->name, __func__);
605                                 err = -EPERM;
606                                 goto abort;
607                         }
608                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
609                         /* fall through */
610                 case TASKFILE_IN:
611                         cmd.protocol = ATA_PROT_PIO;
612                         /* fall through */
613                 case TASKFILE_IN_DMAQ:
614                 case TASKFILE_IN_DMA:
615                         nsect = taskin / SECTOR_SIZE;
616                         data_buf = inbuf;
617                         break;
618                 case TASKFILE_NO_DATA:
619                         cmd.protocol = ATA_PROT_NODATA;
620                         break;
621                 default:
622                         err = -EFAULT;
623                         goto abort;
624         }
625
626         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
627                 nsect = 0;
628         else if (!nsect) {
629                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
630
631                 if (!nsect) {
632                         printk(KERN_ERR "%s: in/out command without data\n",
633                                         drive->name);
634                         err = -EFAULT;
635                         goto abort;
636                 }
637         }
638
639         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
640
641         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
642         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
643
644         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
645             req_task->in_flags.all == 0) {
646                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
647                 if (drive->dev_flags & IDE_DFLAG_LBA48)
648                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
649         }
650
651         if (copy_to_user(buf, req_task, tasksize)) {
652                 err = -EFAULT;
653                 goto abort;
654         }
655         if (taskout) {
656                 int outtotal = tasksize;
657                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
658                         err = -EFAULT;
659                         goto abort;
660                 }
661         }
662         if (taskin) {
663                 int intotal = tasksize + taskout;
664                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
665                         err = -EFAULT;
666                         goto abort;
667                 }
668         }
669 abort:
670         kfree(req_task);
671         kfree(outbuf);
672         kfree(inbuf);
673
674 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
675
676         return err;
677 }
678 #endif