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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/nmi.h>
23#include <linux/scatterlist.h>
24#include <linux/uaccess.h>
25
26#include <asm/io.h>
27
28void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
29{
30 ide_hwif_t *hwif = drive->hwif;
31 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
32
33 /* Be sure we're looking at the low order bytes */
34 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
35
36 tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
37
38 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
39 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
40
41 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
42 }
43}
44
45void ide_tf_dump(const char *s, struct ide_cmd *cmd)
46{
47#ifdef DEBUG
48 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
49 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
50 s, cmd->tf.feature, cmd->tf.nsect,
51 cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
52 cmd->tf.device, cmd->tf.command);
53 printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
54 s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
55#endif
56}
57
58int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
59{
60 struct ide_cmd cmd;
61
62 memset(&cmd, 0, sizeof(cmd));
63 cmd.tf.nsect = 0x01;
64 if (drive->media == ide_disk)
65 cmd.tf.command = ATA_CMD_ID_ATA;
66 else
67 cmd.tf.command = ATA_CMD_ID_ATAPI;
68 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
69 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
70 cmd.protocol = ATA_PROT_PIO;
71
72 return ide_raw_taskfile(drive, &cmd, buf, 1);
73}
74
75static ide_startstop_t task_no_data_intr(ide_drive_t *);
76static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
77static ide_startstop_t task_pio_intr(ide_drive_t *);
78
79ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
80{
81 ide_hwif_t *hwif = drive->hwif;
82 struct ide_cmd *cmd = &hwif->cmd;
83 struct ide_taskfile *tf = &cmd->tf;
84 ide_handler_t *handler = NULL;
85 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
86 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
87
88 if (orig_cmd->protocol == ATA_PROT_PIO &&
89 (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
90 drive->mult_count == 0) {
91 pr_err("%s: multimode not set!\n", drive->name);
92 return ide_stopped;
93 }
94
95 if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
96 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
97
98 memcpy(cmd, orig_cmd, sizeof(*cmd));
99
100 if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
101 ide_tf_dump(drive->name, cmd);
102 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
103
104 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
105 u8 data[2] = { cmd->tf.data, cmd->hob.data };
106
107 tp_ops->output_data(drive, cmd, data, 2);
108 }
109
110 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
111 u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
112 0xE0 : 0xEF;
113
114 if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
115 cmd->tf.device &= HIHI;
116 cmd->tf.device |= drive->select;
117 }
118
119 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
120 tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf);
121 }
122
123 switch (cmd->protocol) {
124 case ATA_PROT_PIO:
125 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
126 tp_ops->exec_command(hwif, tf->command);
127 ndelay(400); /* FIXME */
128 return pre_task_out_intr(drive, cmd);
129 }
130 handler = task_pio_intr;
131 /* fall-through */
132 case ATA_PROT_NODATA:
133 if (handler == NULL)
134 handler = task_no_data_intr;
135 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
136 return ide_started;
137 case ATA_PROT_DMA:
138 if (ide_dma_prepare(drive, cmd))
139 return ide_stopped;
140 hwif->expiry = dma_ops->dma_timer_expiry;
141 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
142 dma_ops->dma_start(drive);
143 default:
144 return ide_started;
145 }
146}
147EXPORT_SYMBOL_GPL(do_rw_taskfile);
148
149static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
150{
151 ide_hwif_t *hwif = drive->hwif;
152 struct ide_cmd *cmd = &hwif->cmd;
153 struct ide_taskfile *tf = &cmd->tf;
154 int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
155 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
156 u8 stat;
157
158 local_irq_enable_in_hardirq();
159
160 while (1) {
161 stat = hwif->tp_ops->read_status(hwif);
162 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
163 break;
164 udelay(10);
165 };
166
167 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
168 if (custom && tf->command == ATA_CMD_SET_MULTI) {
169 drive->mult_req = drive->mult_count = 0;
170 drive->special_flags |= IDE_SFLAG_RECALIBRATE;
171 (void)ide_dump_status(drive, __func__, stat);
172 return ide_stopped;
173 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
174 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
175 ide_set_handler(drive, &task_no_data_intr,
176 WAIT_WORSTCASE);
177 return ide_started;
178 }
179 }
180 return ide_error(drive, "task_no_data_intr", stat);
181 }
182
183 if (custom && tf->command == ATA_CMD_SET_MULTI)
184 drive->mult_count = drive->mult_req;
185
186 if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
187 tf->command == ATA_CMD_CHK_POWER) {
188 struct request *rq = hwif->rq;
189
190 if (ata_pm_request(rq))
191 ide_complete_pm_rq(drive, rq);
192 else
193 ide_finish_cmd(drive, cmd, stat);
194 }
195
196 return ide_stopped;
197}
198
199static u8 wait_drive_not_busy(ide_drive_t *drive)
200{
201 ide_hwif_t *hwif = drive->hwif;
202 int retries;
203 u8 stat;
204
205 /*
206 * Last sector was transferred, wait until device is ready. This can
207 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
208 */
209 for (retries = 0; retries < 1000; retries++) {
210 stat = hwif->tp_ops->read_status(hwif);
211
212 if (stat & ATA_BUSY)
213 udelay(10);
214 else
215 break;
216 }
217
218 if (stat & ATA_BUSY)
219 pr_err("%s: drive still BUSY!\n", drive->name);
220
221 return stat;
222}
223
224void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
225 unsigned int write, unsigned int len)
226{
227 ide_hwif_t *hwif = drive->hwif;
228 struct scatterlist *sg = hwif->sg_table;
229 struct scatterlist *cursg = cmd->cursg;
230 unsigned long uninitialized_var(flags);
231 struct page *page;
232 unsigned int offset;
233 u8 *buf;
234
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 page = sg_page(cursg);
243 offset = cursg->offset + cmd->cursg_ofs;
244
245 /* get the current page and offset */
246 page = nth_page(page, (offset >> PAGE_SHIFT));
247 offset %= PAGE_SIZE;
248
249 nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
250
251 page_is_high = PageHighMem(page);
252 if (page_is_high)
253 local_irq_save(flags);
254
255 buf = kmap_atomic(page) + 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);
272
273 if (page_is_high)
274 local_irq_restore(flags);
275
276 len -= nr_bytes;
277 }
278}
279EXPORT_SYMBOL_GPL(ide_pio_bytes);
280
281static 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 scsi_req(cmd->rq)->result = 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
306static 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, BLK_STS_OK, nr_bytes);
321 }
322}
323
324void 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 scsi_req(rq)->result = 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 ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
339}
340
341/*
342 * Handler for command with PIO data phase.
343 */
344static 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 }
388out_wait:
389 /* Still data left to transfer. */
390 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
391 return ide_started;
392out_end:
393 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
394 ide_finish_cmd(drive, cmd, stat);
395 else
396 ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
397 return ide_stopped;
398out_err:
399 ide_error_cmd(drive, cmd);
400 return ide_error(drive, __func__, stat);
401}
402
403static 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
426int 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
432 rq = blk_get_request(drive->queue,
433 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
434 REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
435 ide_req(rq)->type = ATA_PRIV_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_RECLAIM);
446 if (error)
447 goto put_req;
448 }
449
450 rq->special = cmd;
451 cmd->rq = rq;
452
453 blk_execute_rq(drive->queue, NULL, rq, 0);
454 error = scsi_req(rq)->result ? -EIO : 0;
455put_req:
456 blk_put_request(rq);
457 return error;
458}
459EXPORT_SYMBOL(ide_raw_taskfile);
460
461int 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}
467EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
468
469#ifdef CONFIG_IDE_TASK_IOCTL
470int 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 }
668abort:
669 kfree(req_task);
670 kfree(outbuf);
671 kfree(inbuf);
672
673 return err;
674}
675#endif