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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
4 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2001-2002 Klaus Smolin
6 * IBM Storage Technology Division
7 * Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * The big the bad and the ugly.
10 */
11
12#include <linux/types.h>
13#include <linux/string.h>
14#include <linux/kernel.h>
15#include <linux/export.h>
16#include <linux/sched.h>
17#include <linux/interrupt.h>
18#include <linux/errno.h>
19#include <linux/slab.h>
20#include <linux/delay.h>
21#include <linux/hdreg.h>
22#include <linux/ide.h>
23#include <linux/nmi.h>
24#include <linux/scatterlist.h>
25#include <linux/uaccess.h>
26
27#include <asm/io.h>
28
29void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
30{
31 ide_hwif_t *hwif = drive->hwif;
32 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
33
34 /* Be sure we're looking at the low order bytes */
35 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
36
37 tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
38
39 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
40 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
41
42 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
43 }
44}
45
46void ide_tf_dump(const char *s, struct ide_cmd *cmd)
47{
48#ifdef DEBUG
49 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
50 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
51 s, cmd->tf.feature, cmd->tf.nsect,
52 cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
53 cmd->tf.device, cmd->tf.command);
54 printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
55 s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
56#endif
57}
58
59int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
60{
61 struct ide_cmd cmd;
62
63 memset(&cmd, 0, sizeof(cmd));
64 cmd.tf.nsect = 0x01;
65 if (drive->media == ide_disk)
66 cmd.tf.command = ATA_CMD_ID_ATA;
67 else
68 cmd.tf.command = ATA_CMD_ID_ATAPI;
69 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
70 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
71 cmd.protocol = ATA_PROT_PIO;
72
73 return ide_raw_taskfile(drive, &cmd, buf, 1);
74}
75
76static ide_startstop_t task_no_data_intr(ide_drive_t *);
77static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
78static ide_startstop_t task_pio_intr(ide_drive_t *);
79
80ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
81{
82 ide_hwif_t *hwif = drive->hwif;
83 struct ide_cmd *cmd = &hwif->cmd;
84 struct ide_taskfile *tf = &cmd->tf;
85 ide_handler_t *handler = NULL;
86 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
87 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
88
89 if (orig_cmd->protocol == ATA_PROT_PIO &&
90 (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
91 drive->mult_count == 0) {
92 pr_err("%s: multimode not set!\n", drive->name);
93 return ide_stopped;
94 }
95
96 if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
97 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
98
99 memcpy(cmd, orig_cmd, sizeof(*cmd));
100
101 if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
102 ide_tf_dump(drive->name, cmd);
103 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
104
105 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
106 u8 data[2] = { cmd->tf.data, cmd->hob.data };
107
108 tp_ops->output_data(drive, cmd, data, 2);
109 }
110
111 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
112 u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
113 0xE0 : 0xEF;
114
115 if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
116 cmd->tf.device &= HIHI;
117 cmd->tf.device |= drive->select;
118 }
119
120 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
121 tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf);
122 }
123
124 switch (cmd->protocol) {
125 case ATA_PROT_PIO:
126 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
127 tp_ops->exec_command(hwif, tf->command);
128 ndelay(400); /* FIXME */
129 return pre_task_out_intr(drive, cmd);
130 }
131 handler = task_pio_intr;
132 /* fall through */
133 case ATA_PROT_NODATA:
134 if (handler == NULL)
135 handler = task_no_data_intr;
136 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
137 return ide_started;
138 case ATA_PROT_DMA:
139 if (ide_dma_prepare(drive, cmd))
140 return ide_stopped;
141 hwif->expiry = dma_ops->dma_timer_expiry;
142 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
143 dma_ops->dma_start(drive);
144 /* fall through */
145 default:
146 return ide_started;
147 }
148}
149EXPORT_SYMBOL_GPL(do_rw_taskfile);
150
151static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
152{
153 ide_hwif_t *hwif = drive->hwif;
154 struct ide_cmd *cmd = &hwif->cmd;
155 struct ide_taskfile *tf = &cmd->tf;
156 int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
157 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
158 u8 stat;
159
160 local_irq_enable_in_hardirq();
161
162 while (1) {
163 stat = hwif->tp_ops->read_status(hwif);
164 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
165 break;
166 udelay(10);
167 };
168
169 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
170 if (custom && tf->command == ATA_CMD_SET_MULTI) {
171 drive->mult_req = drive->mult_count = 0;
172 drive->special_flags |= IDE_SFLAG_RECALIBRATE;
173 (void)ide_dump_status(drive, __func__, stat);
174 return ide_stopped;
175 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
176 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
177 ide_set_handler(drive, &task_no_data_intr,
178 WAIT_WORSTCASE);
179 return ide_started;
180 }
181 }
182 return ide_error(drive, "task_no_data_intr", stat);
183 }
184
185 if (custom && tf->command == ATA_CMD_SET_MULTI)
186 drive->mult_count = drive->mult_req;
187
188 if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
189 tf->command == ATA_CMD_CHK_POWER) {
190 struct request *rq = hwif->rq;
191
192 if (ata_pm_request(rq))
193 ide_complete_pm_rq(drive, rq);
194 else
195 ide_finish_cmd(drive, cmd, stat);
196 }
197
198 return ide_stopped;
199}
200
201static u8 wait_drive_not_busy(ide_drive_t *drive)
202{
203 ide_hwif_t *hwif = drive->hwif;
204 int retries;
205 u8 stat;
206
207 /*
208 * Last sector was transferred, wait until device is ready. This can
209 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
210 */
211 for (retries = 0; retries < 1000; retries++) {
212 stat = hwif->tp_ops->read_status(hwif);
213
214 if (stat & ATA_BUSY)
215 udelay(10);
216 else
217 break;
218 }
219
220 if (stat & ATA_BUSY)
221 pr_err("%s: drive still BUSY!\n", drive->name);
222
223 return stat;
224}
225
226void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
227 unsigned int write, unsigned int len)
228{
229 ide_hwif_t *hwif = drive->hwif;
230 struct scatterlist *sg = hwif->sg_table;
231 struct scatterlist *cursg = cmd->cursg;
232 unsigned long uninitialized_var(flags);
233 struct page *page;
234 unsigned int offset;
235 u8 *buf;
236
237 if (cursg == NULL)
238 cursg = cmd->cursg = sg;
239
240 while (len) {
241 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
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 nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
251
252 buf = kmap_atomic(page) + offset;
253
254 cmd->nleft -= nr_bytes;
255 cmd->cursg_ofs += nr_bytes;
256
257 if (cmd->cursg_ofs == cursg->length) {
258 cursg = cmd->cursg = sg_next(cmd->cursg);
259 cmd->cursg_ofs = 0;
260 }
261
262 /* do the actual data transfer */
263 if (write)
264 hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
265 else
266 hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
267
268 kunmap_atomic(buf);
269
270 len -= nr_bytes;
271 }
272}
273EXPORT_SYMBOL_GPL(ide_pio_bytes);
274
275static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
276 unsigned int write)
277{
278 unsigned int nr_bytes;
279
280 u8 saved_io_32bit = drive->io_32bit;
281
282 if (cmd->tf_flags & IDE_TFLAG_FS)
283 scsi_req(cmd->rq)->result = 0;
284
285 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
286 drive->io_32bit = 0;
287
288 touch_softlockup_watchdog();
289
290 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
291 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
292 else
293 nr_bytes = SECTOR_SIZE;
294
295 ide_pio_bytes(drive, cmd, write, nr_bytes);
296
297 drive->io_32bit = saved_io_32bit;
298}
299
300static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
301{
302 if (cmd->tf_flags & IDE_TFLAG_FS) {
303 int nr_bytes = cmd->nbytes - cmd->nleft;
304
305 if (cmd->protocol == ATA_PROT_PIO &&
306 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
307 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
308 nr_bytes -= drive->mult_count << 9;
309 else
310 nr_bytes -= SECTOR_SIZE;
311 }
312
313 if (nr_bytes > 0)
314 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
315 }
316}
317
318void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
319{
320 struct request *rq = drive->hwif->rq;
321 u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
322 u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
323
324 ide_complete_cmd(drive, cmd, stat, err);
325 scsi_req(rq)->result = err;
326
327 if (err == 0 && set_xfer) {
328 ide_set_xfer_rate(drive, nsect);
329 ide_driveid_update(drive);
330 }
331
332 ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
333}
334
335/*
336 * Handler for command with PIO data phase.
337 */
338static ide_startstop_t task_pio_intr(ide_drive_t *drive)
339{
340 ide_hwif_t *hwif = drive->hwif;
341 struct ide_cmd *cmd = &drive->hwif->cmd;
342 u8 stat = hwif->tp_ops->read_status(hwif);
343 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
344
345 if (write == 0) {
346 /* Error? */
347 if (stat & ATA_ERR)
348 goto out_err;
349
350 /* Didn't want any data? Odd. */
351 if ((stat & ATA_DRQ) == 0) {
352 /* Command all done? */
353 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
354 goto out_end;
355
356 /* Assume it was a spurious irq */
357 goto out_wait;
358 }
359 } else {
360 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
361 goto out_err;
362
363 /* Deal with unexpected ATA data phase. */
364 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
365 goto out_err;
366 }
367
368 if (write && cmd->nleft == 0)
369 goto out_end;
370
371 /* Still data left to transfer. */
372 ide_pio_datablock(drive, cmd, write);
373
374 /* Are we done? Check status and finish transfer. */
375 if (write == 0 && cmd->nleft == 0) {
376 stat = wait_drive_not_busy(drive);
377 if (!OK_STAT(stat, 0, BAD_STAT))
378 goto out_err;
379
380 goto out_end;
381 }
382out_wait:
383 /* Still data left to transfer. */
384 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
385 return ide_started;
386out_end:
387 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
388 ide_finish_cmd(drive, cmd, stat);
389 else
390 ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
391 return ide_stopped;
392out_err:
393 ide_error_cmd(drive, cmd);
394 return ide_error(drive, __func__, stat);
395}
396
397static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
398 struct ide_cmd *cmd)
399{
400 ide_startstop_t startstop;
401
402 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
403 drive->bad_wstat, WAIT_DRQ)) {
404 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
405 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
406 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
407 return startstop;
408 }
409
410 if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
411 local_irq_disable();
412
413 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
414
415 ide_pio_datablock(drive, cmd, 1);
416
417 return ide_started;
418}
419
420int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
421 u16 nsect)
422{
423 struct request *rq;
424 int error;
425
426 rq = blk_get_request(drive->queue,
427 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
428 REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
429 ide_req(rq)->type = ATA_PRIV_TASKFILE;
430
431 /*
432 * (ks) We transfer currently only whole sectors.
433 * This is suffient for now. But, it would be great,
434 * if we would find a solution to transfer any size.
435 * To support special commands like READ LONG.
436 */
437 if (nsect) {
438 error = blk_rq_map_kern(drive->queue, rq, buf,
439 nsect * SECTOR_SIZE, GFP_NOIO);
440 if (error)
441 goto put_req;
442 }
443
444 ide_req(rq)->special = cmd;
445 cmd->rq = rq;
446
447 blk_execute_rq(drive->queue, NULL, rq, 0);
448 error = scsi_req(rq)->result ? -EIO : 0;
449put_req:
450 blk_put_request(rq);
451 return error;
452}
453EXPORT_SYMBOL(ide_raw_taskfile);
454
455int 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}
461EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
462
463#ifdef CONFIG_IDE_TASK_IOCTL
464int 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 req_task = memdup_user(buf, tasksize);
479 if (IS_ERR(req_task))
480 return PTR_ERR(req_task);
481
482 taskout = req_task->out_size;
483 taskin = req_task->in_size;
484
485 if (taskin > 65536 || taskout > 65536) {
486 err = -EINVAL;
487 goto abort;
488 }
489
490 if (taskout) {
491 int outtotal = tasksize;
492 outbuf = kzalloc(taskout, GFP_KERNEL);
493 if (outbuf == NULL) {
494 err = -ENOMEM;
495 goto abort;
496 }
497 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
498 err = -EFAULT;
499 goto abort;
500 }
501 }
502
503 if (taskin) {
504 int intotal = tasksize + taskout;
505 inbuf = kzalloc(taskin, GFP_KERNEL);
506 if (inbuf == NULL) {
507 err = -ENOMEM;
508 goto abort;
509 }
510 if (copy_from_user(inbuf, buf + intotal, taskin)) {
511 err = -EFAULT;
512 goto abort;
513 }
514 }
515
516 memset(&cmd, 0, sizeof(cmd));
517
518 memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
519 memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
520
521 cmd.valid.out.tf = IDE_VALID_DEVICE;
522 cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
523 cmd.tf_flags = IDE_TFLAG_IO_16BIT;
524
525 if (drive->dev_flags & IDE_DFLAG_LBA48) {
526 cmd.tf_flags |= IDE_TFLAG_LBA48;
527 cmd.valid.in.hob = IDE_VALID_IN_HOB;
528 }
529
530 if (req_task->out_flags.all) {
531 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
532
533 if (req_task->out_flags.b.data)
534 cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
535
536 if (req_task->out_flags.b.nsector_hob)
537 cmd.valid.out.hob |= IDE_VALID_NSECT;
538 if (req_task->out_flags.b.sector_hob)
539 cmd.valid.out.hob |= IDE_VALID_LBAL;
540 if (req_task->out_flags.b.lcyl_hob)
541 cmd.valid.out.hob |= IDE_VALID_LBAM;
542 if (req_task->out_flags.b.hcyl_hob)
543 cmd.valid.out.hob |= IDE_VALID_LBAH;
544
545 if (req_task->out_flags.b.error_feature)
546 cmd.valid.out.tf |= IDE_VALID_FEATURE;
547 if (req_task->out_flags.b.nsector)
548 cmd.valid.out.tf |= IDE_VALID_NSECT;
549 if (req_task->out_flags.b.sector)
550 cmd.valid.out.tf |= IDE_VALID_LBAL;
551 if (req_task->out_flags.b.lcyl)
552 cmd.valid.out.tf |= IDE_VALID_LBAM;
553 if (req_task->out_flags.b.hcyl)
554 cmd.valid.out.tf |= IDE_VALID_LBAH;
555 } else {
556 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
557 if (cmd.tf_flags & IDE_TFLAG_LBA48)
558 cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
559 }
560
561 if (req_task->in_flags.b.data)
562 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
563
564 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
565 /* fixup data phase if needed */
566 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
567 req_task->data_phase == TASKFILE_IN_DMA)
568 cmd.tf_flags |= IDE_TFLAG_WRITE;
569 }
570
571 cmd.protocol = ATA_PROT_DMA;
572
573 switch (req_task->data_phase) {
574 case TASKFILE_MULTI_OUT:
575 if (!drive->mult_count) {
576 /* (hs): give up if multcount is not set */
577 pr_err("%s: %s Multimode Write multcount is not set\n",
578 drive->name, __func__);
579 err = -EPERM;
580 goto abort;
581 }
582 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
583 /* fall through */
584 case TASKFILE_OUT:
585 cmd.protocol = ATA_PROT_PIO;
586 /* fall through */
587 case TASKFILE_OUT_DMAQ:
588 case TASKFILE_OUT_DMA:
589 cmd.tf_flags |= IDE_TFLAG_WRITE;
590 nsect = taskout / SECTOR_SIZE;
591 data_buf = outbuf;
592 break;
593 case TASKFILE_MULTI_IN:
594 if (!drive->mult_count) {
595 /* (hs): give up if multcount is not set */
596 pr_err("%s: %s Multimode Read multcount is not set\n",
597 drive->name, __func__);
598 err = -EPERM;
599 goto abort;
600 }
601 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
602 /* fall through */
603 case TASKFILE_IN:
604 cmd.protocol = ATA_PROT_PIO;
605 /* fall through */
606 case TASKFILE_IN_DMAQ:
607 case TASKFILE_IN_DMA:
608 nsect = taskin / SECTOR_SIZE;
609 data_buf = inbuf;
610 break;
611 case TASKFILE_NO_DATA:
612 cmd.protocol = ATA_PROT_NODATA;
613 break;
614 default:
615 err = -EFAULT;
616 goto abort;
617 }
618
619 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
620 nsect = 0;
621 else if (!nsect) {
622 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
623
624 if (!nsect) {
625 pr_err("%s: in/out command without data\n",
626 drive->name);
627 err = -EFAULT;
628 goto abort;
629 }
630 }
631
632 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
633
634 memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
635 memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
636
637 if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
638 req_task->in_flags.all == 0) {
639 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
640 if (drive->dev_flags & IDE_DFLAG_LBA48)
641 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
642 }
643
644 if (copy_to_user(buf, req_task, tasksize)) {
645 err = -EFAULT;
646 goto abort;
647 }
648 if (taskout) {
649 int outtotal = tasksize;
650 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
651 err = -EFAULT;
652 goto abort;
653 }
654 }
655 if (taskin) {
656 int intotal = tasksize + taskout;
657 if (copy_to_user(buf + intotal, inbuf, taskin)) {
658 err = -EFAULT;
659 goto abort;
660 }
661 }
662abort:
663 kfree(req_task);
664 kfree(outbuf);
665 kfree(inbuf);
666
667 return err;
668}
669#endif
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
27void 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
44void 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
57int 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
74static ide_startstop_t task_no_data_intr(ide_drive_t *);
75static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
76static ide_startstop_t task_pio_intr(ide_drive_t *);
77
78ide_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}
146EXPORT_SYMBOL_GPL(do_rw_taskfile);
147
148static 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
198static 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
223void 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}
280EXPORT_SYMBOL_GPL(ide_pio_bytes);
281
282static 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
307static 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
325void 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 */
345static 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 }
389out_wait:
390 /* Still data left to transfer. */
391 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
392 return ide_started;
393out_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;
399out_err:
400 ide_error_cmd(drive, cmd);
401 return ide_error(drive, __func__, stat);
402}
403
404static 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
427int 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
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