perf annotate: Add annotated_source__purge function
[linux-2.6-microblaze.git] / drivers / ide / ide-taskfile.c
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
28 void 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
45 void 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
58 int 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
75 static ide_startstop_t task_no_data_intr(ide_drive_t *);
76 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
77 static ide_startstop_t task_pio_intr(ide_drive_t *);
78
79 ide_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 }
147 EXPORT_SYMBOL_GPL(do_rw_taskfile);
148
149 static 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
199 static 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
224 void 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         cursg = cmd->cursg;
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                 int page_is_high;
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                 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 }
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                 scsi_req(cmd->rq)->result = 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, BLK_STS_OK, 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         scsi_req(rq)->result = 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 ? BLK_STS_IOERR : BLK_STS_OK, 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, BLK_STS_OK, 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
433         rq = blk_get_request(drive->queue,
434                 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
435                         REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
436         ide_req(rq)->type = ATA_PRIV_TASKFILE;
437
438         /*
439          * (ks) We transfer currently only whole sectors.
440          * This is suffient for now.  But, it would be great,
441          * if we would find a solution to transfer any size.
442          * To support special commands like READ LONG.
443          */
444         if (nsect) {
445                 error = blk_rq_map_kern(drive->queue, rq, buf,
446                                         nsect * SECTOR_SIZE, __GFP_RECLAIM);
447                 if (error)
448                         goto put_req;
449         }
450
451         rq->special = cmd;
452         cmd->rq = rq;
453
454         blk_execute_rq(drive->queue, NULL, rq, 0);
455         error = scsi_req(rq)->result ? -EIO : 0;
456 put_req:
457         blk_put_request(rq);
458         return error;
459 }
460 EXPORT_SYMBOL(ide_raw_taskfile);
461
462 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
463 {
464         cmd->protocol = ATA_PROT_NODATA;
465
466         return ide_raw_taskfile(drive, cmd, NULL, 0);
467 }
468 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
469
470 #ifdef CONFIG_IDE_TASK_IOCTL
471 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
472 {
473         ide_task_request_t      *req_task;
474         struct ide_cmd          cmd;
475         u8 *outbuf              = NULL;
476         u8 *inbuf               = NULL;
477         u8 *data_buf            = NULL;
478         int err                 = 0;
479         int tasksize            = sizeof(struct ide_task_request_s);
480         unsigned int taskin     = 0;
481         unsigned int taskout    = 0;
482         u16 nsect               = 0;
483         char __user *buf = (char __user *)arg;
484
485         req_task = memdup_user(buf, tasksize);
486         if (IS_ERR(req_task))
487                 return PTR_ERR(req_task);
488
489         taskout = req_task->out_size;
490         taskin  = req_task->in_size;
491
492         if (taskin > 65536 || taskout > 65536) {
493                 err = -EINVAL;
494                 goto abort;
495         }
496
497         if (taskout) {
498                 int outtotal = tasksize;
499                 outbuf = kzalloc(taskout, GFP_KERNEL);
500                 if (outbuf == NULL) {
501                         err = -ENOMEM;
502                         goto abort;
503                 }
504                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
505                         err = -EFAULT;
506                         goto abort;
507                 }
508         }
509
510         if (taskin) {
511                 int intotal = tasksize + taskout;
512                 inbuf = kzalloc(taskin, GFP_KERNEL);
513                 if (inbuf == NULL) {
514                         err = -ENOMEM;
515                         goto abort;
516                 }
517                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
518                         err = -EFAULT;
519                         goto abort;
520                 }
521         }
522
523         memset(&cmd, 0, sizeof(cmd));
524
525         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
526         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
527
528         cmd.valid.out.tf = IDE_VALID_DEVICE;
529         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
530         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
531
532         if (drive->dev_flags & IDE_DFLAG_LBA48) {
533                 cmd.tf_flags |= IDE_TFLAG_LBA48;
534                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
535         }
536
537         if (req_task->out_flags.all) {
538                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
539
540                 if (req_task->out_flags.b.data)
541                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
542
543                 if (req_task->out_flags.b.nsector_hob)
544                         cmd.valid.out.hob |= IDE_VALID_NSECT;
545                 if (req_task->out_flags.b.sector_hob)
546                         cmd.valid.out.hob |= IDE_VALID_LBAL;
547                 if (req_task->out_flags.b.lcyl_hob)
548                         cmd.valid.out.hob |= IDE_VALID_LBAM;
549                 if (req_task->out_flags.b.hcyl_hob)
550                         cmd.valid.out.hob |= IDE_VALID_LBAH;
551
552                 if (req_task->out_flags.b.error_feature)
553                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
554                 if (req_task->out_flags.b.nsector)
555                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
556                 if (req_task->out_flags.b.sector)
557                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
558                 if (req_task->out_flags.b.lcyl)
559                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
560                 if (req_task->out_flags.b.hcyl)
561                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
562         } else {
563                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
564                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
565                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
566         }
567
568         if (req_task->in_flags.b.data)
569                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
570
571         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
572                 /* fixup data phase if needed */
573                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
574                     req_task->data_phase == TASKFILE_IN_DMA)
575                         cmd.tf_flags |= IDE_TFLAG_WRITE;
576         }
577
578         cmd.protocol = ATA_PROT_DMA;
579
580         switch (req_task->data_phase) {
581         case TASKFILE_MULTI_OUT:
582                 if (!drive->mult_count) {
583                         /* (hs): give up if multcount is not set */
584                         pr_err("%s: %s Multimode Write multcount is not set\n",
585                                 drive->name, __func__);
586                         err = -EPERM;
587                         goto abort;
588                 }
589                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
590                 /* fall through */
591         case TASKFILE_OUT:
592                 cmd.protocol = ATA_PROT_PIO;
593                 /* fall through */
594         case TASKFILE_OUT_DMAQ:
595         case TASKFILE_OUT_DMA:
596                 cmd.tf_flags |= IDE_TFLAG_WRITE;
597                 nsect = taskout / SECTOR_SIZE;
598                 data_buf = outbuf;
599                 break;
600         case TASKFILE_MULTI_IN:
601                 if (!drive->mult_count) {
602                         /* (hs): give up if multcount is not set */
603                         pr_err("%s: %s Multimode Read multcount is not set\n",
604                                 drive->name, __func__);
605                         err = -EPERM;
606                         goto abort;
607                 }
608                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
609                 /* fall through */
610         case TASKFILE_IN:
611                 cmd.protocol = ATA_PROT_PIO;
612                 /* fall through */
613         case TASKFILE_IN_DMAQ:
614         case TASKFILE_IN_DMA:
615                 nsect = taskin / SECTOR_SIZE;
616                 data_buf = inbuf;
617                 break;
618         case TASKFILE_NO_DATA:
619                 cmd.protocol = ATA_PROT_NODATA;
620                 break;
621         default:
622                 err = -EFAULT;
623                 goto abort;
624         }
625
626         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
627                 nsect = 0;
628         else if (!nsect) {
629                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
630
631                 if (!nsect) {
632                         pr_err("%s: in/out command without data\n",
633                                         drive->name);
634                         err = -EFAULT;
635                         goto abort;
636                 }
637         }
638
639         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
640
641         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
642         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
643
644         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
645             req_task->in_flags.all == 0) {
646                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
647                 if (drive->dev_flags & IDE_DFLAG_LBA48)
648                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
649         }
650
651         if (copy_to_user(buf, req_task, tasksize)) {
652                 err = -EFAULT;
653                 goto abort;
654         }
655         if (taskout) {
656                 int outtotal = tasksize;
657                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
658                         err = -EFAULT;
659                         goto abort;
660                 }
661         }
662         if (taskin) {
663                 int intotal = tasksize + taskout;
664                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
665                         err = -EFAULT;
666                         goto abort;
667                 }
668         }
669 abort:
670         kfree(req_task);
671         kfree(outbuf);
672         kfree(inbuf);
673
674         return err;
675 }
676 #endif