?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
MAINTAINERS: remove iMX5 section
[linux-2.6.git] / drivers / ide / ide-taskfile.c
blob5bc2839ebcfdff11bed95117570cbb9a1092bfe6
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/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, KM_BIO_SRC_IRQ) + 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, KM_BIO_SRC_IRQ);
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
Linus' kernel tree