286804142e4dc624f018e3efd82d0e995be51bbd
[linux-2.6.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/sched.h>
15 #include <linux/interrupt.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/hdreg.h>
20 #include <linux/ide.h>
21 #include <linux/scatterlist.h>
22
23 #include <asm/uaccess.h>
24 #include <asm/io.h>
25
26 void ide_tf_dump(const char *s, struct ide_taskfile *tf)
27 {
28 #ifdef DEBUG
29         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
30                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
31                 s, tf->feature, tf->nsect, tf->lbal,
32                 tf->lbam, tf->lbah, tf->device, tf->command);
33         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
34                 "lbam 0x%02x lbah 0x%02x\n",
35                 s, tf->hob_nsect, tf->hob_lbal,
36                 tf->hob_lbam, tf->hob_lbah);
37 #endif
38 }
39
40 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
41 {
42         struct ide_cmd cmd;
43
44         memset(&cmd, 0, sizeof(cmd));
45         cmd.tf.nsect = 0x01;
46         if (drive->media == ide_disk)
47                 cmd.tf.command = ATA_CMD_ID_ATA;
48         else
49                 cmd.tf.command = ATA_CMD_ID_ATAPI;
50         cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
51         cmd.protocol = ATA_PROT_PIO;
52
53         return ide_raw_taskfile(drive, &cmd, buf, 1);
54 }
55
56 static ide_startstop_t task_no_data_intr(ide_drive_t *);
57 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
58 static ide_startstop_t task_pio_intr(ide_drive_t *);
59
60 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
61 {
62         ide_hwif_t *hwif = drive->hwif;
63         struct ide_cmd *cmd = &hwif->cmd;
64         struct ide_taskfile *tf = &cmd->tf;
65         ide_handler_t *handler = NULL;
66         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
67         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
68
69         if (orig_cmd->protocol == ATA_PROT_PIO &&
70             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
71             drive->mult_count == 0) {
72                 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
73                 return ide_stopped;
74         }
75
76         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
77                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
78
79         memcpy(cmd, orig_cmd, sizeof(*cmd));
80
81         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
82                 ide_tf_dump(drive->name, tf);
83                 tp_ops->set_irq(hwif, 1);
84                 SELECT_MASK(drive, 0);
85                 tp_ops->tf_load(drive, cmd);
86         }
87
88         switch (cmd->protocol) {
89         case ATA_PROT_PIO:
90                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
91                         tp_ops->exec_command(hwif, tf->command);
92                         ndelay(400);    /* FIXME */
93                         return pre_task_out_intr(drive, cmd);
94                 }
95                 handler = task_pio_intr;
96                 /* fall-through */
97         case ATA_PROT_NODATA:
98                 if (handler == NULL)
99                         handler = task_no_data_intr;
100                 ide_execute_command(drive, tf->command, handler,
101                                     WAIT_WORSTCASE, NULL);
102                 return ide_started;
103         case ATA_PROT_DMA:
104                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
105                     ide_build_sglist(drive, cmd) == 0 ||
106                     dma_ops->dma_setup(drive, cmd))
107                         return ide_stopped;
108                 dma_ops->dma_exec_cmd(drive, tf->command);
109                 dma_ops->dma_start(drive);
110         default:
111                 return ide_started;
112         }
113 }
114 EXPORT_SYMBOL_GPL(do_rw_taskfile);
115
116 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
117 {
118         ide_hwif_t *hwif = drive->hwif;
119         struct ide_cmd *cmd = &hwif->cmd;
120         struct ide_taskfile *tf = &cmd->tf;
121         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
122         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
123         u8 stat;
124
125         local_irq_enable_in_hardirq();
126
127         while (1) {
128                 stat = hwif->tp_ops->read_status(hwif);
129                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
130                         break;
131                 udelay(10);
132         };
133
134         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
135                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
136                         drive->mult_req = drive->mult_count = 0;
137                         drive->special.b.recalibrate = 1;
138                         (void)ide_dump_status(drive, __func__, stat);
139                         return ide_stopped;
140                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
141                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
142                                 ide_set_handler(drive, &task_no_data_intr,
143                                                 WAIT_WORSTCASE);
144                                 return ide_started;
145                         }
146                 }
147                 return ide_error(drive, "task_no_data_intr", stat);
148         }
149
150         if (custom && tf->command == ATA_CMD_SET_MULTI)
151                 drive->mult_count = drive->mult_req;
152
153         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
154             tf->command == ATA_CMD_CHK_POWER) {
155                 struct request *rq = hwif->rq;
156
157                 if (blk_pm_request(rq))
158                         ide_complete_pm_rq(drive, rq);
159                 else
160                         ide_finish_cmd(drive, cmd, stat);
161         }
162
163         return ide_stopped;
164 }
165
166 static u8 wait_drive_not_busy(ide_drive_t *drive)
167 {
168         ide_hwif_t *hwif = drive->hwif;
169         int retries;
170         u8 stat;
171
172         /*
173          * Last sector was transfered, wait until device is ready.  This can
174          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
175          */
176         for (retries = 0; retries < 1000; retries++) {
177                 stat = hwif->tp_ops->read_status(hwif);
178
179                 if (stat & ATA_BUSY)
180                         udelay(10);
181                 else
182                         break;
183         }
184
185         if (stat & ATA_BUSY)
186                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
187
188         return stat;
189 }
190
191 static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
192                            unsigned int write)
193 {
194         ide_hwif_t *hwif = drive->hwif;
195         struct scatterlist *sg = hwif->sg_table;
196         struct scatterlist *cursg = cmd->cursg;
197         struct page *page;
198 #ifdef CONFIG_HIGHMEM
199         unsigned long flags;
200 #endif
201         unsigned int offset;
202         u8 *buf;
203
204         cursg = cmd->cursg;
205         if (!cursg) {
206                 cursg = sg;
207                 cmd->cursg = sg;
208         }
209
210         page = sg_page(cursg);
211         offset = cursg->offset + cmd->cursg_ofs * SECTOR_SIZE;
212
213         /* get the current page and offset */
214         page = nth_page(page, (offset >> PAGE_SHIFT));
215         offset %= PAGE_SIZE;
216
217 #ifdef CONFIG_HIGHMEM
218         local_irq_save(flags);
219 #endif
220         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
221
222         cmd->nleft--;
223         cmd->cursg_ofs++;
224
225         if ((cmd->cursg_ofs * SECTOR_SIZE) == cursg->length) {
226                 cmd->cursg = sg_next(cmd->cursg);
227                 cmd->cursg_ofs = 0;
228         }
229
230         /* do the actual data transfer */
231         if (write)
232                 hwif->tp_ops->output_data(drive, cmd, buf, SECTOR_SIZE);
233         else
234                 hwif->tp_ops->input_data(drive, cmd, buf, SECTOR_SIZE);
235
236         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
237 #ifdef CONFIG_HIGHMEM
238         local_irq_restore(flags);
239 #endif
240 }
241
242 static void ide_pio_multi(ide_drive_t *drive, struct ide_cmd *cmd,
243                           unsigned int write)
244 {
245         unsigned int nsect;
246
247         nsect = min_t(unsigned int, cmd->nleft, drive->mult_count);
248         while (nsect--)
249                 ide_pio_sector(drive, cmd, write);
250 }
251
252 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
253                               unsigned int write)
254 {
255         u8 saved_io_32bit = drive->io_32bit;
256
257         if (cmd->tf_flags & IDE_TFLAG_FS)
258                 cmd->rq->errors = 0;
259
260         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
261                 drive->io_32bit = 0;
262
263         touch_softlockup_watchdog();
264
265         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
266                 ide_pio_multi(drive, cmd, write);
267         else
268                 ide_pio_sector(drive, cmd, write);
269
270         drive->io_32bit = saved_io_32bit;
271 }
272
273 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
274 {
275         if (cmd->tf_flags & IDE_TFLAG_FS) {
276                 int sectors = cmd->nsect - cmd->nleft;
277
278                 if (cmd->protocol == ATA_PROT_PIO &&
279                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
280                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
281                                 sectors -= drive->mult_count;
282                         else
283                                 sectors--;
284                 }
285
286                 if (sectors > 0)
287                         ide_complete_rq(drive, 0, sectors << 9);
288         }
289 }
290
291 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
292 {
293         struct request *rq = drive->hwif->rq;
294         u8 err = ide_read_error(drive);
295
296         ide_complete_cmd(drive, cmd, stat, err);
297         rq->errors = err;
298         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
299 }
300
301 /*
302  * Handler for command with PIO data phase.
303  */
304 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
305 {
306         ide_hwif_t *hwif = drive->hwif;
307         struct ide_cmd *cmd = &drive->hwif->cmd;
308         u8 stat = hwif->tp_ops->read_status(hwif);
309         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
310
311         if (write == 0) {
312                 /* Error? */
313                 if (stat & ATA_ERR)
314                         goto out_err;
315
316                 /* Didn't want any data? Odd. */
317                 if ((stat & ATA_DRQ) == 0) {
318                         /* Command all done? */
319                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
320                                 goto out_end;
321
322                         /* Assume it was a spurious irq */
323                         goto out_wait;
324                 }
325         } else {
326                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
327                         goto out_err;
328
329                 /* Deal with unexpected ATA data phase. */
330                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
331                         goto out_err;
332         }
333
334         if (write && cmd->nleft == 0)
335                 goto out_end;
336
337         /* Still data left to transfer. */
338         ide_pio_datablock(drive, cmd, write);
339
340         /* Are we done? Check status and finish transfer. */
341         if (write == 0 && cmd->nleft == 0) {
342                 stat = wait_drive_not_busy(drive);
343                 if (!OK_STAT(stat, 0, BAD_STAT))
344                         goto out_err;
345
346                 goto out_end;
347         }
348 out_wait:
349         /* Still data left to transfer. */
350         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
351         return ide_started;
352 out_end:
353         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
354                 ide_finish_cmd(drive, cmd, stat);
355         else
356                 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
357         return ide_stopped;
358 out_err:
359         ide_error_cmd(drive, cmd);
360         return ide_error(drive, __func__, stat);
361 }
362
363 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
364                                          struct ide_cmd *cmd)
365 {
366         ide_startstop_t startstop;
367
368         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
369                           drive->bad_wstat, WAIT_DRQ)) {
370                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
371                         drive->name,
372                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
373                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
374                 return startstop;
375         }
376
377         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
378                 local_irq_disable();
379
380         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
381
382         ide_pio_datablock(drive, cmd, 1);
383
384         return ide_started;
385 }
386
387 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
388                      u16 nsect)
389 {
390         struct request *rq;
391         int error;
392
393         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
394         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
395         rq->buffer = buf;
396
397         /*
398          * (ks) We transfer currently only whole sectors.
399          * This is suffient for now.  But, it would be great,
400          * if we would find a solution to transfer any size.
401          * To support special commands like READ LONG.
402          */
403         rq->hard_nr_sectors = rq->nr_sectors = nsect;
404         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
405
406         if (cmd->tf_flags & IDE_TFLAG_WRITE)
407                 rq->cmd_flags |= REQ_RW;
408
409         rq->special = cmd;
410         cmd->rq = rq;
411
412         error = blk_execute_rq(drive->queue, NULL, rq, 0);
413         blk_put_request(rq);
414
415         return error;
416 }
417
418 EXPORT_SYMBOL(ide_raw_taskfile);
419
420 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
421 {
422         cmd->protocol = ATA_PROT_NODATA;
423
424         return ide_raw_taskfile(drive, cmd, NULL, 0);
425 }
426 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
427
428 #ifdef CONFIG_IDE_TASK_IOCTL
429 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
430 {
431         ide_task_request_t      *req_task;
432         struct ide_cmd          cmd;
433         u8 *outbuf              = NULL;
434         u8 *inbuf               = NULL;
435         u8 *data_buf            = NULL;
436         int err                 = 0;
437         int tasksize            = sizeof(struct ide_task_request_s);
438         unsigned int taskin     = 0;
439         unsigned int taskout    = 0;
440         u16 nsect               = 0;
441         char __user *buf = (char __user *)arg;
442
443 //      printk("IDE Taskfile ...\n");
444
445         req_task = kzalloc(tasksize, GFP_KERNEL);
446         if (req_task == NULL) return -ENOMEM;
447         if (copy_from_user(req_task, buf, tasksize)) {
448                 kfree(req_task);
449                 return -EFAULT;
450         }
451
452         taskout = req_task->out_size;
453         taskin  = req_task->in_size;
454         
455         if (taskin > 65536 || taskout > 65536) {
456                 err = -EINVAL;
457                 goto abort;
458         }
459
460         if (taskout) {
461                 int outtotal = tasksize;
462                 outbuf = kzalloc(taskout, GFP_KERNEL);
463                 if (outbuf == NULL) {
464                         err = -ENOMEM;
465                         goto abort;
466                 }
467                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
468                         err = -EFAULT;
469                         goto abort;
470                 }
471         }
472
473         if (taskin) {
474                 int intotal = tasksize + taskout;
475                 inbuf = kzalloc(taskin, GFP_KERNEL);
476                 if (inbuf == NULL) {
477                         err = -ENOMEM;
478                         goto abort;
479                 }
480                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
481                         err = -EFAULT;
482                         goto abort;
483                 }
484         }
485
486         memset(&cmd, 0, sizeof(cmd));
487
488         memcpy(&cmd.tf_array[0], req_task->hob_ports,
489                HDIO_DRIVE_HOB_HDR_SIZE - 2);
490         memcpy(&cmd.tf_array[6], req_task->io_ports,
491                HDIO_DRIVE_TASK_HDR_SIZE);
492
493         cmd.tf_flags   = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
494                          IDE_TFLAG_IN_TF;
495
496         if (drive->dev_flags & IDE_DFLAG_LBA48)
497                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
498
499         if (req_task->out_flags.all) {
500                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
501
502                 if (req_task->out_flags.b.data)
503                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
504
505                 if (req_task->out_flags.b.nsector_hob)
506                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
507                 if (req_task->out_flags.b.sector_hob)
508                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
509                 if (req_task->out_flags.b.lcyl_hob)
510                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
511                 if (req_task->out_flags.b.hcyl_hob)
512                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
513
514                 if (req_task->out_flags.b.error_feature)
515                         cmd.tf_flags |= IDE_TFLAG_OUT_FEATURE;
516                 if (req_task->out_flags.b.nsector)
517                         cmd.tf_flags |= IDE_TFLAG_OUT_NSECT;
518                 if (req_task->out_flags.b.sector)
519                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAL;
520                 if (req_task->out_flags.b.lcyl)
521                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAM;
522                 if (req_task->out_flags.b.hcyl)
523                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAH;
524         } else {
525                 cmd.tf_flags |= IDE_TFLAG_OUT_TF;
526                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
527                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB;
528         }
529
530         if (req_task->in_flags.b.data)
531                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
532
533         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
534                 /* fixup data phase if needed */
535                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
536                     req_task->data_phase == TASKFILE_IN_DMA)
537                         cmd.tf_flags |= IDE_TFLAG_WRITE;
538         }
539
540         cmd.protocol = ATA_PROT_DMA;
541
542         switch (req_task->data_phase) {
543                 case TASKFILE_MULTI_OUT:
544                         if (!drive->mult_count) {
545                                 /* (hs): give up if multcount is not set */
546                                 printk(KERN_ERR "%s: %s Multimode Write " \
547                                         "multcount is not set\n",
548                                         drive->name, __func__);
549                                 err = -EPERM;
550                                 goto abort;
551                         }
552                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
553                         /* fall through */
554                 case TASKFILE_OUT:
555                         cmd.protocol = ATA_PROT_PIO;
556                         /* fall through */
557                 case TASKFILE_OUT_DMAQ:
558                 case TASKFILE_OUT_DMA:
559                         cmd.tf_flags |= IDE_TFLAG_WRITE;
560                         nsect = taskout / SECTOR_SIZE;
561                         data_buf = outbuf;
562                         break;
563                 case TASKFILE_MULTI_IN:
564                         if (!drive->mult_count) {
565                                 /* (hs): give up if multcount is not set */
566                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
567                                         "multcount is not set\n",
568                                         drive->name, __func__);
569                                 err = -EPERM;
570                                 goto abort;
571                         }
572                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
573                         /* fall through */
574                 case TASKFILE_IN:
575                         cmd.protocol = ATA_PROT_PIO;
576                         /* fall through */
577                 case TASKFILE_IN_DMAQ:
578                 case TASKFILE_IN_DMA:
579                         nsect = taskin / SECTOR_SIZE;
580                         data_buf = inbuf;
581                         break;
582                 case TASKFILE_NO_DATA:
583                         cmd.protocol = ATA_PROT_NODATA;
584                         break;
585                 default:
586                         err = -EFAULT;
587                         goto abort;
588         }
589
590         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
591                 nsect = 0;
592         else if (!nsect) {
593                 nsect = (cmd.tf.hob_nsect << 8) | cmd.tf.nsect;
594
595                 if (!nsect) {
596                         printk(KERN_ERR "%s: in/out command without data\n",
597                                         drive->name);
598                         err = -EFAULT;
599                         goto abort;
600                 }
601         }
602
603         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
604
605         memcpy(req_task->hob_ports, &cmd.tf_array[0],
606                HDIO_DRIVE_HOB_HDR_SIZE - 2);
607         memcpy(req_task->io_ports, &cmd.tf_array[6],
608                HDIO_DRIVE_TASK_HDR_SIZE);
609
610         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
611             req_task->in_flags.all == 0) {
612                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
613                 if (drive->dev_flags & IDE_DFLAG_LBA48)
614                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
615         }
616
617         if (copy_to_user(buf, req_task, tasksize)) {
618                 err = -EFAULT;
619                 goto abort;
620         }
621         if (taskout) {
622                 int outtotal = tasksize;
623                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
624                         err = -EFAULT;
625                         goto abort;
626                 }
627         }
628         if (taskin) {
629                 int intotal = tasksize + taskout;
630                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
631                         err = -EFAULT;
632                         goto abort;
633                 }
634         }
635 abort:
636         kfree(req_task);
637         kfree(outbuf);
638         kfree(inbuf);
639
640 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
641
642         return err;
643 }
644 #endif