ide: merge ide_hwgroup_t with ide_hwif_t (v2)
[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         ide_task_t args;
43
44         memset(&args, 0, sizeof(ide_task_t));
45         args.tf.nsect = 0x01;
46         if (drive->media == ide_disk)
47                 args.tf.command = ATA_CMD_ID_ATA;
48         else
49                 args.tf.command = ATA_CMD_ID_ATAPI;
50         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
51         args.data_phase = TASKFILE_IN;
52         return ide_raw_taskfile(drive, &args, buf, 1);
53 }
54
55 static ide_startstop_t task_no_data_intr(ide_drive_t *);
56 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
57 static ide_startstop_t task_in_intr(ide_drive_t *);
58
59 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
60 {
61         ide_hwif_t *hwif        = HWIF(drive);
62         struct ide_taskfile *tf = &task->tf;
63         ide_handler_t *handler = NULL;
64         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
65         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
66
67         if (task->data_phase == TASKFILE_MULTI_IN ||
68             task->data_phase == TASKFILE_MULTI_OUT) {
69                 if (!drive->mult_count) {
70                         printk(KERN_ERR "%s: multimode not set!\n",
71                                         drive->name);
72                         return ide_stopped;
73                 }
74         }
75
76         if (task->tf_flags & IDE_TFLAG_FLAGGED)
77                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
78
79         memcpy(&hwif->task, task, sizeof(*task));
80
81         if ((task->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, task);
86         }
87
88         switch (task->data_phase) {
89         case TASKFILE_MULTI_OUT:
90         case TASKFILE_OUT:
91                 tp_ops->exec_command(hwif, tf->command);
92                 ndelay(400);    /* FIXME */
93                 return pre_task_out_intr(drive, task->rq);
94         case TASKFILE_MULTI_IN:
95         case TASKFILE_IN:
96                 handler = task_in_intr;
97                 /* fall-through */
98         case TASKFILE_NO_DATA:
99                 if (handler == NULL)
100                         handler = task_no_data_intr;
101                 ide_execute_command(drive, tf->command, handler,
102                                     WAIT_WORSTCASE, NULL);
103                 return ide_started;
104         default:
105                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
106                     dma_ops->dma_setup(drive))
107                         return ide_stopped;
108                 dma_ops->dma_exec_cmd(drive, tf->command);
109                 dma_ops->dma_start(drive);
110                 return ide_started;
111         }
112 }
113 EXPORT_SYMBOL_GPL(do_rw_taskfile);
114
115 /*
116  * Handler for commands without a data phase
117  */
118 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
119 {
120         ide_hwif_t *hwif = drive->hwif;
121         ide_task_t *task = &hwif->task;
122         struct ide_taskfile *tf = &task->tf;
123         int custom = (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
124         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
125         u8 stat;
126
127         local_irq_enable_in_hardirq();
128
129         while (1) {
130                 stat = hwif->tp_ops->read_status(hwif);
131                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
132                         break;
133                 udelay(10);
134         };
135
136         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
137                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
138                         drive->mult_req = drive->mult_count = 0;
139                         drive->special.b.recalibrate = 1;
140                         (void)ide_dump_status(drive, __func__, stat);
141                         return ide_stopped;
142                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
143                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
144                                 ide_set_handler(drive, &task_no_data_intr,
145                                                 WAIT_WORSTCASE, NULL);
146                                 return ide_started;
147                         }
148                 }
149                 return ide_error(drive, "task_no_data_intr", stat);
150                 /* calls ide_end_drive_cmd */
151         }
152
153         if (!custom)
154                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
155         else if (tf->command == ATA_CMD_IDLEIMMEDIATE) {
156                 hwif->tp_ops->tf_read(drive, task);
157                 if (tf->lbal != 0xc4) {
158                         printk(KERN_ERR "%s: head unload failed!\n",
159                                drive->name);
160                         ide_tf_dump(drive->name, tf);
161                 } else
162                         drive->dev_flags |= IDE_DFLAG_PARKED;
163                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
164         } else if (tf->command == ATA_CMD_SET_MULTI)
165                 drive->mult_count = drive->mult_req;
166
167         return ide_stopped;
168 }
169
170 static u8 wait_drive_not_busy(ide_drive_t *drive)
171 {
172         ide_hwif_t *hwif = drive->hwif;
173         int retries;
174         u8 stat;
175
176         /*
177          * Last sector was transfered, wait until device is ready.  This can
178          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
179          */
180         for (retries = 0; retries < 1000; retries++) {
181                 stat = hwif->tp_ops->read_status(hwif);
182
183                 if (stat & ATA_BUSY)
184                         udelay(10);
185                 else
186                         break;
187         }
188
189         if (stat & ATA_BUSY)
190                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
191
192         return stat;
193 }
194
195 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
196                            unsigned int write)
197 {
198         ide_hwif_t *hwif = drive->hwif;
199         struct scatterlist *sg = hwif->sg_table;
200         struct scatterlist *cursg = hwif->cursg;
201         struct page *page;
202 #ifdef CONFIG_HIGHMEM
203         unsigned long flags;
204 #endif
205         unsigned int offset;
206         u8 *buf;
207
208         cursg = hwif->cursg;
209         if (!cursg) {
210                 cursg = sg;
211                 hwif->cursg = sg;
212         }
213
214         page = sg_page(cursg);
215         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
216
217         /* get the current page and offset */
218         page = nth_page(page, (offset >> PAGE_SHIFT));
219         offset %= PAGE_SIZE;
220
221 #ifdef CONFIG_HIGHMEM
222         local_irq_save(flags);
223 #endif
224         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
225
226         hwif->nleft--;
227         hwif->cursg_ofs++;
228
229         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
230                 hwif->cursg = sg_next(hwif->cursg);
231                 hwif->cursg_ofs = 0;
232         }
233
234         /* do the actual data transfer */
235         if (write)
236                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
237         else
238                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
239
240         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
241 #ifdef CONFIG_HIGHMEM
242         local_irq_restore(flags);
243 #endif
244 }
245
246 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
247                           unsigned int write)
248 {
249         unsigned int nsect;
250
251         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
252         while (nsect--)
253                 ide_pio_sector(drive, rq, write);
254 }
255
256 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
257                                      unsigned int write)
258 {
259         u8 saved_io_32bit = drive->io_32bit;
260
261         if (rq->bio)    /* fs request */
262                 rq->errors = 0;
263
264         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
265                 ide_task_t *task = rq->special;
266
267                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
268                         drive->io_32bit = 0;
269         }
270
271         touch_softlockup_watchdog();
272
273         switch (drive->hwif->data_phase) {
274         case TASKFILE_MULTI_IN:
275         case TASKFILE_MULTI_OUT:
276                 ide_pio_multi(drive, rq, write);
277                 break;
278         default:
279                 ide_pio_sector(drive, rq, write);
280                 break;
281         }
282
283         drive->io_32bit = saved_io_32bit;
284 }
285
286 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
287                                   const char *s, u8 stat)
288 {
289         if (rq->bio) {
290                 ide_hwif_t *hwif = drive->hwif;
291                 int sectors = hwif->nsect - hwif->nleft;
292
293                 switch (hwif->data_phase) {
294                 case TASKFILE_IN:
295                         if (hwif->nleft)
296                                 break;
297                         /* fall through */
298                 case TASKFILE_OUT:
299                         sectors--;
300                         break;
301                 case TASKFILE_MULTI_IN:
302                         if (hwif->nleft)
303                                 break;
304                         /* fall through */
305                 case TASKFILE_MULTI_OUT:
306                         sectors -= drive->mult_count;
307                 default:
308                         break;
309                 }
310
311                 if (sectors > 0) {
312                         ide_driver_t *drv;
313
314                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
315                         drv->end_request(drive, 1, sectors);
316                 }
317         }
318         return ide_error(drive, s, stat);
319 }
320
321 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
322 {
323         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
324                 u8 err = ide_read_error(drive);
325
326                 ide_end_drive_cmd(drive, stat, err);
327                 return;
328         }
329
330         if (rq->rq_disk) {
331                 ide_driver_t *drv;
332
333                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
334                 drv->end_request(drive, 1, rq->nr_sectors);
335         } else
336                 ide_end_request(drive, 1, rq->nr_sectors);
337 }
338
339 /*
340  * We got an interrupt on a task_in case, but no errors and no DRQ.
341  *
342  * It might be a spurious irq (shared irq), but it might be a
343  * command that had no output.
344  */
345 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
346 {
347         /* Command all done? */
348         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
349                 task_end_request(drive, rq, stat);
350                 return ide_stopped;
351         }
352
353         /* Assume it was a spurious irq */
354         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
355         return ide_started;
356 }
357
358 /*
359  * Handler for command with PIO data-in phase (Read/Read Multiple).
360  */
361 static ide_startstop_t task_in_intr(ide_drive_t *drive)
362 {
363         ide_hwif_t *hwif = drive->hwif;
364         struct request *rq = hwif->rq;
365         u8 stat = hwif->tp_ops->read_status(hwif);
366
367         /* Error? */
368         if (stat & ATA_ERR)
369                 return task_error(drive, rq, __func__, stat);
370
371         /* Didn't want any data? Odd. */
372         if ((stat & ATA_DRQ) == 0)
373                 return task_in_unexpected(drive, rq, stat);
374
375         ide_pio_datablock(drive, rq, 0);
376
377         /* Are we done? Check status and finish transfer. */
378         if (!hwif->nleft) {
379                 stat = wait_drive_not_busy(drive);
380                 if (!OK_STAT(stat, 0, BAD_STAT))
381                         return task_error(drive, rq, __func__, stat);
382                 task_end_request(drive, rq, stat);
383                 return ide_stopped;
384         }
385
386         /* Still data left to transfer. */
387         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
388
389         return ide_started;
390 }
391
392 /*
393  * Handler for command with PIO data-out phase (Write/Write Multiple).
394  */
395 static ide_startstop_t task_out_intr (ide_drive_t *drive)
396 {
397         ide_hwif_t *hwif = drive->hwif;
398         struct request *rq = hwif->rq;
399         u8 stat = hwif->tp_ops->read_status(hwif);
400
401         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
402                 return task_error(drive, rq, __func__, stat);
403
404         /* Deal with unexpected ATA data phase. */
405         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
406                 return task_error(drive, rq, __func__, stat);
407
408         if (!hwif->nleft) {
409                 task_end_request(drive, rq, stat);
410                 return ide_stopped;
411         }
412
413         /* Still data left to transfer. */
414         ide_pio_datablock(drive, rq, 1);
415         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
416
417         return ide_started;
418 }
419
420 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
421 {
422         ide_startstop_t startstop;
423
424         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
425                           drive->bad_wstat, WAIT_DRQ)) {
426                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
427                         drive->name, drive->hwif->data_phase ? "MULT" : "",
428                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
429                 return startstop;
430         }
431
432         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
433                 local_irq_disable();
434
435         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
436         ide_pio_datablock(drive, rq, 1);
437
438         return ide_started;
439 }
440
441 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
442 {
443         struct request *rq;
444         int error;
445
446         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
447         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
448         rq->buffer = buf;
449
450         /*
451          * (ks) We transfer currently only whole sectors.
452          * This is suffient for now.  But, it would be great,
453          * if we would find a solution to transfer any size.
454          * To support special commands like READ LONG.
455          */
456         rq->hard_nr_sectors = rq->nr_sectors = nsect;
457         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
458
459         if (task->tf_flags & IDE_TFLAG_WRITE)
460                 rq->cmd_flags |= REQ_RW;
461
462         rq->special = task;
463         task->rq = rq;
464
465         error = blk_execute_rq(drive->queue, NULL, rq, 0);
466         blk_put_request(rq);
467
468         return error;
469 }
470
471 EXPORT_SYMBOL(ide_raw_taskfile);
472
473 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
474 {
475         task->data_phase = TASKFILE_NO_DATA;
476
477         return ide_raw_taskfile(drive, task, NULL, 0);
478 }
479 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
480
481 #ifdef CONFIG_IDE_TASK_IOCTL
482 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
483 {
484         ide_task_request_t      *req_task;
485         ide_task_t              args;
486         u8 *outbuf              = NULL;
487         u8 *inbuf               = NULL;
488         u8 *data_buf            = NULL;
489         int err                 = 0;
490         int tasksize            = sizeof(struct ide_task_request_s);
491         unsigned int taskin     = 0;
492         unsigned int taskout    = 0;
493         u16 nsect               = 0;
494         char __user *buf = (char __user *)arg;
495
496 //      printk("IDE Taskfile ...\n");
497
498         req_task = kzalloc(tasksize, GFP_KERNEL);
499         if (req_task == NULL) return -ENOMEM;
500         if (copy_from_user(req_task, buf, tasksize)) {
501                 kfree(req_task);
502                 return -EFAULT;
503         }
504
505         taskout = req_task->out_size;
506         taskin  = req_task->in_size;
507         
508         if (taskin > 65536 || taskout > 65536) {
509                 err = -EINVAL;
510                 goto abort;
511         }
512
513         if (taskout) {
514                 int outtotal = tasksize;
515                 outbuf = kzalloc(taskout, GFP_KERNEL);
516                 if (outbuf == NULL) {
517                         err = -ENOMEM;
518                         goto abort;
519                 }
520                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
521                         err = -EFAULT;
522                         goto abort;
523                 }
524         }
525
526         if (taskin) {
527                 int intotal = tasksize + taskout;
528                 inbuf = kzalloc(taskin, GFP_KERNEL);
529                 if (inbuf == NULL) {
530                         err = -ENOMEM;
531                         goto abort;
532                 }
533                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
534                         err = -EFAULT;
535                         goto abort;
536                 }
537         }
538
539         memset(&args, 0, sizeof(ide_task_t));
540
541         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
542         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
543
544         args.data_phase = req_task->data_phase;
545
546         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
547                         IDE_TFLAG_IN_TF;
548         if (drive->dev_flags & IDE_DFLAG_LBA48)
549                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
550
551         if (req_task->out_flags.all) {
552                 args.tf_flags |= IDE_TFLAG_FLAGGED;
553
554                 if (req_task->out_flags.b.data)
555                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
556
557                 if (req_task->out_flags.b.nsector_hob)
558                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
559                 if (req_task->out_flags.b.sector_hob)
560                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
561                 if (req_task->out_flags.b.lcyl_hob)
562                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
563                 if (req_task->out_flags.b.hcyl_hob)
564                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
565
566                 if (req_task->out_flags.b.error_feature)
567                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
568                 if (req_task->out_flags.b.nsector)
569                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
570                 if (req_task->out_flags.b.sector)
571                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
572                 if (req_task->out_flags.b.lcyl)
573                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
574                 if (req_task->out_flags.b.hcyl)
575                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
576         } else {
577                 args.tf_flags |= IDE_TFLAG_OUT_TF;
578                 if (args.tf_flags & IDE_TFLAG_LBA48)
579                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
580         }
581
582         if (req_task->in_flags.b.data)
583                 args.tf_flags |= IDE_TFLAG_IN_DATA;
584
585         switch(req_task->data_phase) {
586                 case TASKFILE_MULTI_OUT:
587                         if (!drive->mult_count) {
588                                 /* (hs): give up if multcount is not set */
589                                 printk(KERN_ERR "%s: %s Multimode Write " \
590                                         "multcount is not set\n",
591                                         drive->name, __func__);
592                                 err = -EPERM;
593                                 goto abort;
594                         }
595                         /* fall through */
596                 case TASKFILE_OUT:
597                         /* fall through */
598                 case TASKFILE_OUT_DMAQ:
599                 case TASKFILE_OUT_DMA:
600                         nsect = taskout / SECTOR_SIZE;
601                         data_buf = outbuf;
602                         break;
603                 case TASKFILE_MULTI_IN:
604                         if (!drive->mult_count) {
605                                 /* (hs): give up if multcount is not set */
606                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
607                                         "multcount is not set\n",
608                                         drive->name, __func__);
609                                 err = -EPERM;
610                                 goto abort;
611                         }
612                         /* fall through */
613                 case TASKFILE_IN:
614                         /* fall through */
615                 case TASKFILE_IN_DMAQ:
616                 case TASKFILE_IN_DMA:
617                         nsect = taskin / SECTOR_SIZE;
618                         data_buf = inbuf;
619                         break;
620                 case TASKFILE_NO_DATA:
621                         break;
622                 default:
623                         err = -EFAULT;
624                         goto abort;
625         }
626
627         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
628                 nsect = 0;
629         else if (!nsect) {
630                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
631
632                 if (!nsect) {
633                         printk(KERN_ERR "%s: in/out command without data\n",
634                                         drive->name);
635                         err = -EFAULT;
636                         goto abort;
637                 }
638         }
639
640         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
641                 args.tf_flags |= IDE_TFLAG_WRITE;
642
643         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
644
645         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
646         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
647
648         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
649             req_task->in_flags.all == 0) {
650                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
651                 if (drive->dev_flags & IDE_DFLAG_LBA48)
652                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
653         }
654
655         if (copy_to_user(buf, req_task, tasksize)) {
656                 err = -EFAULT;
657                 goto abort;
658         }
659         if (taskout) {
660                 int outtotal = tasksize;
661                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
662                         err = -EFAULT;
663                         goto abort;
664                 }
665         }
666         if (taskin) {
667                 int intotal = tasksize + taskout;
668                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
669                         err = -EFAULT;
670                         goto abort;
671                 }
672         }
673 abort:
674         kfree(req_task);
675         kfree(outbuf);
676         kfree(inbuf);
677
678 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
679
680         return err;
681 }
682 #endif