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