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mm: fix truncate_setsize() comment
[linux-2.6/next.git] / drivers / ide / ide-taskfile.c
blob34b9872f35d1238b623ce00373e2f040dd5bd248
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 #include <linux/uaccess.h>
23
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 pr_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 pr_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 unsigned long uninitialized_var(flags);
229 struct page *page;
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 int page_is_high;
240
241 if (nr_bytes > PAGE_SIZE)
242 nr_bytes = PAGE_SIZE;
243
244 page = sg_page(cursg);
245 offset = cursg->offset + cmd->cursg_ofs;
246
247 /* get the current page and offset */
248 page = nth_page(page, (offset >> PAGE_SHIFT));
249 offset %= PAGE_SIZE;
250
251 page_is_high = PageHighMem(page);
252 if (page_is_high)
253 local_irq_save(flags);
254
255 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
256
257 cmd->nleft -= nr_bytes;
258 cmd->cursg_ofs += nr_bytes;
259
260 if (cmd->cursg_ofs == cursg->length) {
261 cursg = cmd->cursg = sg_next(cmd->cursg);
262 cmd->cursg_ofs = 0;
263 }
264
265 /* do the actual data transfer */
266 if (write)
267 hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
268 else
269 hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
270
271 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
272
273 if (page_is_high)
274 local_irq_restore(flags);
275
276 len -= nr_bytes;
277 }
278 }
279 EXPORT_SYMBOL_GPL(ide_pio_bytes);
280
281 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
282 unsigned int write)
283 {
284 unsigned int nr_bytes;
285
286 u8 saved_io_32bit = drive->io_32bit;
287
288 if (cmd->tf_flags & IDE_TFLAG_FS)
289 cmd->rq->errors = 0;
290
291 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
292 drive->io_32bit = 0;
293
294 touch_softlockup_watchdog();
295
296 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
297 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
298 else
299 nr_bytes = SECTOR_SIZE;
300
301 ide_pio_bytes(drive, cmd, write, nr_bytes);
302
303 drive->io_32bit = saved_io_32bit;
304 }
305
306 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
307 {
308 if (cmd->tf_flags & IDE_TFLAG_FS) {
309 int nr_bytes = cmd->nbytes - cmd->nleft;
310
311 if (cmd->protocol == ATA_PROT_PIO &&
312 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
313 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
314 nr_bytes -= drive->mult_count << 9;
315 else
316 nr_bytes -= SECTOR_SIZE;
317 }
318
319 if (nr_bytes > 0)
320 ide_complete_rq(drive, 0, nr_bytes);
321 }
322 }
323
324 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
325 {
326 struct request *rq = drive->hwif->rq;
327 u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
328 u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
329
330 ide_complete_cmd(drive, cmd, stat, err);
331 rq->errors = err;
332
333 if (err == 0 && set_xfer) {
334 ide_set_xfer_rate(drive, nsect);
335 ide_driveid_update(drive);
336 }
337
338 ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
339 }
340
341 /*
342 * Handler for command with PIO data phase.
343 */
344 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
345 {
346 ide_hwif_t *hwif = drive->hwif;
347 struct ide_cmd *cmd = &drive->hwif->cmd;
348 u8 stat = hwif->tp_ops->read_status(hwif);
349 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
350
351 if (write == 0) {
352 /* Error? */
353 if (stat & ATA_ERR)
354 goto out_err;
355
356 /* Didn't want any data? Odd. */
357 if ((stat & ATA_DRQ) == 0) {
358 /* Command all done? */
359 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
360 goto out_end;
361
362 /* Assume it was a spurious irq */
363 goto out_wait;
364 }
365 } else {
366 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
367 goto out_err;
368
369 /* Deal with unexpected ATA data phase. */
370 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
371 goto out_err;
372 }
373
374 if (write && cmd->nleft == 0)
375 goto out_end;
376
377 /* Still data left to transfer. */
378 ide_pio_datablock(drive, cmd, write);
379
380 /* Are we done? Check status and finish transfer. */
381 if (write == 0 && cmd->nleft == 0) {
382 stat = wait_drive_not_busy(drive);
383 if (!OK_STAT(stat, 0, BAD_STAT))
384 goto out_err;
385
386 goto out_end;
387 }
388 out_wait:
389 /* Still data left to transfer. */
390 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
391 return ide_started;
392 out_end:
393 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
394 ide_finish_cmd(drive, cmd, stat);
395 else
396 ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
397 return ide_stopped;
398 out_err:
399 ide_error_cmd(drive, cmd);
400 return ide_error(drive, __func__, stat);
401 }
402
403 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
404 struct ide_cmd *cmd)
405 {
406 ide_startstop_t startstop;
407
408 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
409 drive->bad_wstat, WAIT_DRQ)) {
410 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
411 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
412 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
413 return startstop;
414 }
415
416 if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
417 local_irq_disable();
418
419 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
420
421 ide_pio_datablock(drive, cmd, 1);
422
423 return ide_started;
424 }
425
426 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
427 u16 nsect)
428 {
429 struct request *rq;
430 int error;
431 int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;
432
433 rq = blk_get_request(drive->queue, rw, __GFP_WAIT);
434 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
435
436 /*
437 * (ks) We transfer currently only whole sectors.
438 * This is suffient for now. But, it would be great,
439 * if we would find a solution to transfer any size.
440 * To support special commands like READ LONG.
441 */
442 if (nsect) {
443 error = blk_rq_map_kern(drive->queue, rq, buf,
444 nsect * SECTOR_SIZE, __GFP_WAIT);
445 if (error)
446 goto put_req;
447 }
448
449 rq->special = cmd;
450 cmd->rq = rq;
451
452 error = blk_execute_rq(drive->queue, NULL, rq, 0);
453
454 put_req:
455 blk_put_request(rq);
456 return error;
457 }
458 EXPORT_SYMBOL(ide_raw_taskfile);
459
460 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
461 {
462 cmd->protocol = ATA_PROT_NODATA;
463
464 return ide_raw_taskfile(drive, cmd, NULL, 0);
465 }
466 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
467
468 #ifdef CONFIG_IDE_TASK_IOCTL
469 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
470 {
471 ide_task_request_t *req_task;
472 struct ide_cmd cmd;
473 u8 *outbuf = NULL;
474 u8 *inbuf = NULL;
475 u8 *data_buf = NULL;
476 int err = 0;
477 int tasksize = sizeof(struct ide_task_request_s);
478 unsigned int taskin = 0;
479 unsigned int taskout = 0;
480 u16 nsect = 0;
481 char __user *buf = (char __user *)arg;
482
483 req_task = memdup_user(buf, tasksize);
484 if (IS_ERR(req_task))
485 return PTR_ERR(req_task);
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 pr_err("%s: %s Multimode Write multcount is not set\n",
583 drive->name, __func__);
584 err = -EPERM;
585 goto abort;
586 }
587 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
588 /* fall through */
589 case TASKFILE_OUT:
590 cmd.protocol = ATA_PROT_PIO;
591 /* fall through */
592 case TASKFILE_OUT_DMAQ:
593 case TASKFILE_OUT_DMA:
594 cmd.tf_flags |= IDE_TFLAG_WRITE;
595 nsect = taskout / SECTOR_SIZE;
596 data_buf = outbuf;
597 break;
598 case TASKFILE_MULTI_IN:
599 if (!drive->mult_count) {
600 /* (hs): give up if multcount is not set */
601 pr_err("%s: %s Multimode Read multcount is not set\n",
602 drive->name, __func__);
603 err = -EPERM;
604 goto abort;
605 }
606 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
607 /* fall through */
608 case TASKFILE_IN:
609 cmd.protocol = ATA_PROT_PIO;
610 /* fall through */
611 case TASKFILE_IN_DMAQ:
612 case TASKFILE_IN_DMA:
613 nsect = taskin / SECTOR_SIZE;
614 data_buf = inbuf;
615 break;
616 case TASKFILE_NO_DATA:
617 cmd.protocol = ATA_PROT_NODATA;
618 break;
619 default:
620 err = -EFAULT;
621 goto abort;
622 }
623
624 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
625 nsect = 0;
626 else if (!nsect) {
627 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
628
629 if (!nsect) {
630 pr_err("%s: in/out command without data\n",
631 drive->name);
632 err = -EFAULT;
633 goto abort;
634 }
635 }
636
637 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
638
639 memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
640 memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
641
642 if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
643 req_task->in_flags.all == 0) {
644 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
645 if (drive->dev_flags & IDE_DFLAG_LBA48)
646 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
647 }
648
649 if (copy_to_user(buf, req_task, tasksize)) {
650 err = -EFAULT;
651 goto abort;
652 }
653 if (taskout) {
654 int outtotal = tasksize;
655 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
656 err = -EFAULT;
657 goto abort;
658 }
659 }
660 if (taskin) {
661 int intotal = tasksize + taskout;
662 if (copy_to_user(buf + intotal, inbuf, taskin)) {
663 err = -EFAULT;
664 goto abort;
665 }
666 }
667 abort:
668 kfree(req_task);
669 kfree(outbuf);
670 kfree(inbuf);
671
672 return err;
673 }
674 #endif
linux-next