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
ide_tf_readback(ide_drive_t * drive,struct ide_cmd * cmd)29 void 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
ide_tf_dump(const char * s,struct ide_cmd * cmd)46 void 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
taskfile_lib_get_identify(ide_drive_t * drive,u8 * buf)59 int 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
76 static ide_startstop_t task_no_data_intr(ide_drive_t *);
77 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
78 static ide_startstop_t task_pio_intr(ide_drive_t *);
79
do_rw_taskfile(ide_drive_t * drive,struct ide_cmd * orig_cmd)80 ide_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 fallthrough;
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 fallthrough;
145 default:
146 return ide_started;
147 }
148 }
149 EXPORT_SYMBOL_GPL(do_rw_taskfile);
150
task_no_data_intr(ide_drive_t * drive)151 static 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
wait_drive_not_busy(ide_drive_t * drive)201 static 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
ide_pio_bytes(ide_drive_t * drive,struct ide_cmd * cmd,unsigned int write,unsigned int len)226 void 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 struct page *page;
233 unsigned int offset;
234 u8 *buf;
235
236 if (cursg == NULL)
237 cursg = cmd->cursg = sg;
238
239 while (len) {
240 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
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 buf = kmap_atomic(page) + offset;
252
253 cmd->nleft -= nr_bytes;
254 cmd->cursg_ofs += nr_bytes;
255
256 if (cmd->cursg_ofs == cursg->length) {
257 cursg = cmd->cursg = sg_next(cmd->cursg);
258 cmd->cursg_ofs = 0;
259 }
260
261 /* do the actual data transfer */
262 if (write)
263 hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
264 else
265 hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
266
267 kunmap_atomic(buf);
268
269 len -= nr_bytes;
270 }
271 }
272 EXPORT_SYMBOL_GPL(ide_pio_bytes);
273
ide_pio_datablock(ide_drive_t * drive,struct ide_cmd * cmd,unsigned int write)274 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
275 unsigned int write)
276 {
277 unsigned int nr_bytes;
278
279 u8 saved_io_32bit = drive->io_32bit;
280
281 if (cmd->tf_flags & IDE_TFLAG_FS)
282 scsi_req(cmd->rq)->result = 0;
283
284 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
285 drive->io_32bit = 0;
286
287 touch_softlockup_watchdog();
288
289 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
290 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
291 else
292 nr_bytes = SECTOR_SIZE;
293
294 ide_pio_bytes(drive, cmd, write, nr_bytes);
295
296 drive->io_32bit = saved_io_32bit;
297 }
298
ide_error_cmd(ide_drive_t * drive,struct ide_cmd * cmd)299 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
300 {
301 if (cmd->tf_flags & IDE_TFLAG_FS) {
302 int nr_bytes = cmd->nbytes - cmd->nleft;
303
304 if (cmd->protocol == ATA_PROT_PIO &&
305 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
306 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
307 nr_bytes -= drive->mult_count << 9;
308 else
309 nr_bytes -= SECTOR_SIZE;
310 }
311
312 if (nr_bytes > 0)
313 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
314 }
315 }
316
ide_finish_cmd(ide_drive_t * drive,struct ide_cmd * cmd,u8 stat)317 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
318 {
319 struct request *rq = drive->hwif->rq;
320 u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
321 u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
322
323 ide_complete_cmd(drive, cmd, stat, err);
324 scsi_req(rq)->result = err;
325
326 if (err == 0 && set_xfer) {
327 ide_set_xfer_rate(drive, nsect);
328 ide_driveid_update(drive);
329 }
330
331 ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
332 }
333
334 /*
335 * Handler for command with PIO data phase.
336 */
task_pio_intr(ide_drive_t * drive)337 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
338 {
339 ide_hwif_t *hwif = drive->hwif;
340 struct ide_cmd *cmd = &drive->hwif->cmd;
341 u8 stat = hwif->tp_ops->read_status(hwif);
342 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
343
344 if (write == 0) {
345 /* Error? */
346 if (stat & ATA_ERR)
347 goto out_err;
348
349 /* Didn't want any data? Odd. */
350 if ((stat & ATA_DRQ) == 0) {
351 /* Command all done? */
352 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
353 goto out_end;
354
355 /* Assume it was a spurious irq */
356 goto out_wait;
357 }
358 } else {
359 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
360 goto out_err;
361
362 /* Deal with unexpected ATA data phase. */
363 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
364 goto out_err;
365 }
366
367 if (write && cmd->nleft == 0)
368 goto out_end;
369
370 /* Still data left to transfer. */
371 ide_pio_datablock(drive, cmd, write);
372
373 /* Are we done? Check status and finish transfer. */
374 if (write == 0 && cmd->nleft == 0) {
375 stat = wait_drive_not_busy(drive);
376 if (!OK_STAT(stat, 0, BAD_STAT))
377 goto out_err;
378
379 goto out_end;
380 }
381 out_wait:
382 /* Still data left to transfer. */
383 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
384 return ide_started;
385 out_end:
386 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
387 ide_finish_cmd(drive, cmd, stat);
388 else
389 ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
390 return ide_stopped;
391 out_err:
392 ide_error_cmd(drive, cmd);
393 return ide_error(drive, __func__, stat);
394 }
395
pre_task_out_intr(ide_drive_t * drive,struct ide_cmd * cmd)396 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
397 struct ide_cmd *cmd)
398 {
399 ide_startstop_t startstop;
400
401 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
402 drive->bad_wstat, WAIT_DRQ)) {
403 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
404 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
405 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
406 return startstop;
407 }
408
409 if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
410 local_irq_disable();
411
412 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
413
414 ide_pio_datablock(drive, cmd, 1);
415
416 return ide_started;
417 }
418
ide_raw_taskfile(ide_drive_t * drive,struct ide_cmd * cmd,u8 * buf,u16 nsect)419 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
420 u16 nsect)
421 {
422 struct request *rq;
423 int error;
424
425 rq = blk_get_request(drive->queue,
426 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
427 REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
428 ide_req(rq)->type = ATA_PRIV_TASKFILE;
429
430 /*
431 * (ks) We transfer currently only whole sectors.
432 * This is suffient for now. But, it would be great,
433 * if we would find a solution to transfer any size.
434 * To support special commands like READ LONG.
435 */
436 if (nsect) {
437 error = blk_rq_map_kern(drive->queue, rq, buf,
438 nsect * SECTOR_SIZE, GFP_NOIO);
439 if (error)
440 goto put_req;
441 }
442
443 ide_req(rq)->special = cmd;
444 cmd->rq = rq;
445
446 blk_execute_rq(NULL, rq, 0);
447 error = scsi_req(rq)->result ? -EIO : 0;
448 put_req:
449 blk_put_request(rq);
450 return error;
451 }
452 EXPORT_SYMBOL(ide_raw_taskfile);
453
ide_no_data_taskfile(ide_drive_t * drive,struct ide_cmd * cmd)454 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
455 {
456 cmd->protocol = ATA_PROT_NODATA;
457
458 return ide_raw_taskfile(drive, cmd, NULL, 0);
459 }
460 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
461
462 #ifdef CONFIG_IDE_TASK_IOCTL
ide_taskfile_ioctl(ide_drive_t * drive,unsigned long arg)463 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
464 {
465 ide_task_request_t *req_task;
466 struct ide_cmd cmd;
467 u8 *outbuf = NULL;
468 u8 *inbuf = NULL;
469 u8 *data_buf = NULL;
470 int err = 0;
471 int tasksize = sizeof(struct ide_task_request_s);
472 unsigned int taskin = 0;
473 unsigned int taskout = 0;
474 u16 nsect = 0;
475 char __user *buf = (char __user *)arg;
476
477 req_task = memdup_user(buf, tasksize);
478 if (IS_ERR(req_task))
479 return PTR_ERR(req_task);
480
481 taskout = req_task->out_size;
482 taskin = req_task->in_size;
483
484 if (taskin > 65536 || taskout > 65536) {
485 err = -EINVAL;
486 goto abort;
487 }
488
489 if (taskout) {
490 int outtotal = tasksize;
491 outbuf = kzalloc(taskout, GFP_KERNEL);
492 if (outbuf == NULL) {
493 err = -ENOMEM;
494 goto abort;
495 }
496 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
497 err = -EFAULT;
498 goto abort;
499 }
500 }
501
502 if (taskin) {
503 int intotal = tasksize + taskout;
504 inbuf = kzalloc(taskin, GFP_KERNEL);
505 if (inbuf == NULL) {
506 err = -ENOMEM;
507 goto abort;
508 }
509 if (copy_from_user(inbuf, buf + intotal, taskin)) {
510 err = -EFAULT;
511 goto abort;
512 }
513 }
514
515 memset(&cmd, 0, sizeof(cmd));
516
517 memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
518 memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
519
520 cmd.valid.out.tf = IDE_VALID_DEVICE;
521 cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
522 cmd.tf_flags = IDE_TFLAG_IO_16BIT;
523
524 if (drive->dev_flags & IDE_DFLAG_LBA48) {
525 cmd.tf_flags |= IDE_TFLAG_LBA48;
526 cmd.valid.in.hob = IDE_VALID_IN_HOB;
527 }
528
529 if (req_task->out_flags.all) {
530 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
531
532 if (req_task->out_flags.b.data)
533 cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
534
535 if (req_task->out_flags.b.nsector_hob)
536 cmd.valid.out.hob |= IDE_VALID_NSECT;
537 if (req_task->out_flags.b.sector_hob)
538 cmd.valid.out.hob |= IDE_VALID_LBAL;
539 if (req_task->out_flags.b.lcyl_hob)
540 cmd.valid.out.hob |= IDE_VALID_LBAM;
541 if (req_task->out_flags.b.hcyl_hob)
542 cmd.valid.out.hob |= IDE_VALID_LBAH;
543
544 if (req_task->out_flags.b.error_feature)
545 cmd.valid.out.tf |= IDE_VALID_FEATURE;
546 if (req_task->out_flags.b.nsector)
547 cmd.valid.out.tf |= IDE_VALID_NSECT;
548 if (req_task->out_flags.b.sector)
549 cmd.valid.out.tf |= IDE_VALID_LBAL;
550 if (req_task->out_flags.b.lcyl)
551 cmd.valid.out.tf |= IDE_VALID_LBAM;
552 if (req_task->out_flags.b.hcyl)
553 cmd.valid.out.tf |= IDE_VALID_LBAH;
554 } else {
555 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
556 if (cmd.tf_flags & IDE_TFLAG_LBA48)
557 cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
558 }
559
560 if (req_task->in_flags.b.data)
561 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
562
563 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
564 /* fixup data phase if needed */
565 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
566 req_task->data_phase == TASKFILE_IN_DMA)
567 cmd.tf_flags |= IDE_TFLAG_WRITE;
568 }
569
570 cmd.protocol = ATA_PROT_DMA;
571
572 switch (req_task->data_phase) {
573 case TASKFILE_MULTI_OUT:
574 if (!drive->mult_count) {
575 /* (hs): give up if multcount is not set */
576 pr_err("%s: %s Multimode Write multcount is not set\n",
577 drive->name, __func__);
578 err = -EPERM;
579 goto abort;
580 }
581 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
582 fallthrough;
583 case TASKFILE_OUT:
584 cmd.protocol = ATA_PROT_PIO;
585 fallthrough;
586 case TASKFILE_OUT_DMAQ:
587 case TASKFILE_OUT_DMA:
588 cmd.tf_flags |= IDE_TFLAG_WRITE;
589 nsect = taskout / SECTOR_SIZE;
590 data_buf = outbuf;
591 break;
592 case TASKFILE_MULTI_IN:
593 if (!drive->mult_count) {
594 /* (hs): give up if multcount is not set */
595 pr_err("%s: %s Multimode Read multcount is not set\n",
596 drive->name, __func__);
597 err = -EPERM;
598 goto abort;
599 }
600 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
601 fallthrough;
602 case TASKFILE_IN:
603 cmd.protocol = ATA_PROT_PIO;
604 fallthrough;
605 case TASKFILE_IN_DMAQ:
606 case TASKFILE_IN_DMA:
607 nsect = taskin / SECTOR_SIZE;
608 data_buf = inbuf;
609 break;
610 case TASKFILE_NO_DATA:
611 cmd.protocol = ATA_PROT_NODATA;
612 break;
613 default:
614 err = -EFAULT;
615 goto abort;
616 }
617
618 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
619 nsect = 0;
620 else if (!nsect) {
621 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
622
623 if (!nsect) {
624 pr_err("%s: in/out command without data\n",
625 drive->name);
626 err = -EFAULT;
627 goto abort;
628 }
629 }
630
631 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
632
633 memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
634 memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
635
636 if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
637 req_task->in_flags.all == 0) {
638 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
639 if (drive->dev_flags & IDE_DFLAG_LBA48)
640 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
641 }
642
643 if (copy_to_user(buf, req_task, tasksize)) {
644 err = -EFAULT;
645 goto abort;
646 }
647 if (taskout) {
648 int outtotal = tasksize;
649 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
650 err = -EFAULT;
651 goto abort;
652 }
653 }
654 if (taskin) {
655 int intotal = tasksize + taskout;
656 if (copy_to_user(buf + intotal, inbuf, taskin)) {
657 err = -EFAULT;
658 goto abort;
659 }
660 }
661 abort:
662 kfree(req_task);
663 kfree(outbuf);
664 kfree(inbuf);
665
666 return err;
667 }
668 #endif
669