ide: delete filenames/versions from comments
[linux-2.6] / 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     Bartlomiej Zolnierkiewicz
7  *
8  *  The big the bad and the ugly.
9  */
10
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/string.h>
14 #include <linux/kernel.h>
15 #include <linux/timer.h>
16 #include <linux/mm.h>
17 #include <linux/sched.h>
18 #include <linux/interrupt.h>
19 #include <linux/major.h>
20 #include <linux/errno.h>
21 #include <linux/genhd.h>
22 #include <linux/blkpg.h>
23 #include <linux/slab.h>
24 #include <linux/pci.h>
25 #include <linux/delay.h>
26 #include <linux/hdreg.h>
27 #include <linux/ide.h>
28 #include <linux/bitops.h>
29 #include <linux/scatterlist.h>
30
31 #include <asm/byteorder.h>
32 #include <asm/irq.h>
33 #include <asm/uaccess.h>
34 #include <asm/io.h>
35
36 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
37 {
38         ide_hwif_t *hwif = drive->hwif;
39         struct ide_taskfile *tf = &task->tf;
40         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
41
42         if (task->tf_flags & IDE_TFLAG_FLAGGED)
43                 HIHI = 0xFF;
44
45 #ifdef DEBUG
46         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
47                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
48                 drive->name, tf->feature, tf->nsect, tf->lbal,
49                 tf->lbam, tf->lbah, tf->device, tf->command);
50         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
51                 "lbam 0x%02x lbah 0x%02x\n",
52                 drive->name, tf->hob_nsect, tf->hob_lbal,
53                 tf->hob_lbam, tf->hob_lbah);
54 #endif
55
56         ide_set_irq(drive, 1);
57
58         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
59                 SELECT_MASK(drive, 0);
60
61         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
62                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
63
64         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
65                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
67                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
69                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
70         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
71                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
72         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
73                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
74
75         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
76                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
77         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
78                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
79         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
80                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
81         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
82                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
83         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
84                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
85
86         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
87                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
88 }
89
90 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
91 {
92         ide_task_t args;
93
94         memset(&args, 0, sizeof(ide_task_t));
95         args.tf.nsect = 0x01;
96         if (drive->media == ide_disk)
97                 args.tf.command = WIN_IDENTIFY;
98         else
99                 args.tf.command = WIN_PIDENTIFY;
100         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
101         args.data_phase = TASKFILE_IN;
102         return ide_raw_taskfile(drive, &args, buf, 1);
103 }
104
105 static int inline task_dma_ok(ide_task_t *task)
106 {
107         if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
108                 return 1;
109
110         switch (task->tf.command) {
111                 case WIN_WRITEDMA_ONCE:
112                 case WIN_WRITEDMA:
113                 case WIN_WRITEDMA_EXT:
114                 case WIN_READDMA_ONCE:
115                 case WIN_READDMA:
116                 case WIN_READDMA_EXT:
117                 case WIN_IDENTIFY_DMA:
118                         return 1;
119         }
120
121         return 0;
122 }
123
124 static ide_startstop_t task_no_data_intr(ide_drive_t *);
125 static ide_startstop_t set_geometry_intr(ide_drive_t *);
126 static ide_startstop_t recal_intr(ide_drive_t *);
127 static ide_startstop_t set_multmode_intr(ide_drive_t *);
128 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
129 static ide_startstop_t task_in_intr(ide_drive_t *);
130
131 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
132 {
133         ide_hwif_t *hwif        = HWIF(drive);
134         struct ide_taskfile *tf = &task->tf;
135         ide_handler_t *handler = NULL;
136
137         if (task->data_phase == TASKFILE_MULTI_IN ||
138             task->data_phase == TASKFILE_MULTI_OUT) {
139                 if (!drive->mult_count) {
140                         printk(KERN_ERR "%s: multimode not set!\n",
141                                         drive->name);
142                         return ide_stopped;
143                 }
144         }
145
146         if (task->tf_flags & IDE_TFLAG_FLAGGED)
147                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
148
149         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
150                 ide_tf_load(drive, task);
151
152         switch (task->data_phase) {
153         case TASKFILE_MULTI_OUT:
154         case TASKFILE_OUT:
155                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
156                 ndelay(400);    /* FIXME */
157                 return pre_task_out_intr(drive, task->rq);
158         case TASKFILE_MULTI_IN:
159         case TASKFILE_IN:
160                 handler = task_in_intr;
161                 /* fall-through */
162         case TASKFILE_NO_DATA:
163                 if (handler == NULL)
164                         handler = task_no_data_intr;
165                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
166                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
167                         switch (tf->command) {
168                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
169                         case WIN_RESTORE: handler = recal_intr;         break;
170                         case WIN_SETMULT: handler = set_multmode_intr;  break;
171                         }
172                 }
173                 ide_execute_command(drive, tf->command, handler,
174                                     WAIT_WORSTCASE, NULL);
175                 return ide_started;
176         default:
177                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
178                     hwif->dma_setup(drive))
179                         return ide_stopped;
180                 hwif->dma_exec_cmd(drive, tf->command);
181                 hwif->dma_start(drive);
182                 return ide_started;
183         }
184 }
185 EXPORT_SYMBOL_GPL(do_rw_taskfile);
186
187 /*
188  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
189  */
190 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
191 {
192         ide_hwif_t *hwif = HWIF(drive);
193         u8 stat;
194
195         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
196                 drive->mult_count = drive->mult_req;
197         } else {
198                 drive->mult_req = drive->mult_count = 0;
199                 drive->special.b.recalibrate = 1;
200                 (void) ide_dump_status(drive, "set_multmode", stat);
201         }
202         return ide_stopped;
203 }
204
205 /*
206  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
207  */
208 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
209 {
210         ide_hwif_t *hwif = HWIF(drive);
211         int retries = 5;
212         u8 stat;
213
214         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
215                 udelay(10);
216
217         if (OK_STAT(stat, READY_STAT, BAD_STAT))
218                 return ide_stopped;
219
220         if (stat & (ERR_STAT|DRQ_STAT))
221                 return ide_error(drive, "set_geometry_intr", stat);
222
223         BUG_ON(HWGROUP(drive)->handler != NULL);
224         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
225         return ide_started;
226 }
227
228 /*
229  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
230  */
231 static ide_startstop_t recal_intr(ide_drive_t *drive)
232 {
233         ide_hwif_t *hwif = HWIF(drive);
234         u8 stat;
235
236         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
237                 return ide_error(drive, "recal_intr", stat);
238         return ide_stopped;
239 }
240
241 /*
242  * Handler for commands without a data phase
243  */
244 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
245 {
246         ide_task_t *args        = HWGROUP(drive)->rq->special;
247         ide_hwif_t *hwif        = HWIF(drive);
248         u8 stat;
249
250         local_irq_enable_in_hardirq();
251         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
252                 return ide_error(drive, "task_no_data_intr", stat);
253                 /* calls ide_end_drive_cmd */
254         }
255         if (args)
256                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
257
258         return ide_stopped;
259 }
260
261 static u8 wait_drive_not_busy(ide_drive_t *drive)
262 {
263         ide_hwif_t *hwif = HWIF(drive);
264         int retries;
265         u8 stat;
266
267         /*
268          * Last sector was transfered, wait until drive is ready.
269          * This can take up to 10 usec, but we will wait max 1 ms.
270          */
271         for (retries = 0; retries < 100; retries++) {
272                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
273                         udelay(10);
274                 else
275                         break;
276         }
277
278         if (stat & BUSY_STAT)
279                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
280
281         return stat;
282 }
283
284 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
285 {
286         ide_hwif_t *hwif = drive->hwif;
287         struct scatterlist *sg = hwif->sg_table;
288         struct scatterlist *cursg = hwif->cursg;
289         struct page *page;
290 #ifdef CONFIG_HIGHMEM
291         unsigned long flags;
292 #endif
293         unsigned int offset;
294         u8 *buf;
295
296         cursg = hwif->cursg;
297         if (!cursg) {
298                 cursg = sg;
299                 hwif->cursg = sg;
300         }
301
302         page = sg_page(cursg);
303         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
304
305         /* get the current page and offset */
306         page = nth_page(page, (offset >> PAGE_SHIFT));
307         offset %= PAGE_SIZE;
308
309 #ifdef CONFIG_HIGHMEM
310         local_irq_save(flags);
311 #endif
312         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
313
314         hwif->nleft--;
315         hwif->cursg_ofs++;
316
317         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
318                 hwif->cursg = sg_next(hwif->cursg);
319                 hwif->cursg_ofs = 0;
320         }
321
322         /* do the actual data transfer */
323         if (write)
324                 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
325         else
326                 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
327
328         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
329 #ifdef CONFIG_HIGHMEM
330         local_irq_restore(flags);
331 #endif
332 }
333
334 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
335 {
336         unsigned int nsect;
337
338         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
339         while (nsect--)
340                 ide_pio_sector(drive, write);
341 }
342
343 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
344                                      unsigned int write)
345 {
346         u8 saved_io_32bit = drive->io_32bit;
347
348         if (rq->bio)    /* fs request */
349                 rq->errors = 0;
350
351         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
352                 ide_task_t *task = rq->special;
353
354                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
355                         drive->io_32bit = 0;
356         }
357
358         touch_softlockup_watchdog();
359
360         switch (drive->hwif->data_phase) {
361         case TASKFILE_MULTI_IN:
362         case TASKFILE_MULTI_OUT:
363                 ide_pio_multi(drive, write);
364                 break;
365         default:
366                 ide_pio_sector(drive, write);
367                 break;
368         }
369
370         drive->io_32bit = saved_io_32bit;
371 }
372
373 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
374                                   const char *s, u8 stat)
375 {
376         if (rq->bio) {
377                 ide_hwif_t *hwif = drive->hwif;
378                 int sectors = hwif->nsect - hwif->nleft;
379
380                 switch (hwif->data_phase) {
381                 case TASKFILE_IN:
382                         if (hwif->nleft)
383                                 break;
384                         /* fall through */
385                 case TASKFILE_OUT:
386                         sectors--;
387                         break;
388                 case TASKFILE_MULTI_IN:
389                         if (hwif->nleft)
390                                 break;
391                         /* fall through */
392                 case TASKFILE_MULTI_OUT:
393                         sectors -= drive->mult_count;
394                 default:
395                         break;
396                 }
397
398                 if (sectors > 0) {
399                         ide_driver_t *drv;
400
401                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
402                         drv->end_request(drive, 1, sectors);
403                 }
404         }
405         return ide_error(drive, s, stat);
406 }
407
408 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
409 {
410         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
411                 u8 err = drive->hwif->INB(IDE_ERROR_REG);
412
413                 ide_end_drive_cmd(drive, stat, err);
414                 return;
415         }
416
417         if (rq->rq_disk) {
418                 ide_driver_t *drv;
419
420                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
421                 drv->end_request(drive, 1, rq->nr_sectors);
422         } else
423                 ide_end_request(drive, 1, rq->nr_sectors);
424 }
425
426 /*
427  * Handler for command with PIO data-in phase (Read/Read Multiple).
428  */
429 static ide_startstop_t task_in_intr(ide_drive_t *drive)
430 {
431         ide_hwif_t *hwif = drive->hwif;
432         struct request *rq = HWGROUP(drive)->rq;
433         u8 stat = hwif->INB(IDE_STATUS_REG);
434
435         /* new way for dealing with premature shared PCI interrupts */
436         if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
437                 if (stat & (ERR_STAT | DRQ_STAT))
438                         return task_error(drive, rq, __FUNCTION__, stat);
439                 /* No data yet, so wait for another IRQ. */
440                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
441                 return ide_started;
442         }
443
444         ide_pio_datablock(drive, rq, 0);
445
446         /* If it was the last datablock check status and finish transfer. */
447         if (!hwif->nleft) {
448                 stat = wait_drive_not_busy(drive);
449                 if (!OK_STAT(stat, 0, BAD_STAT))
450                         return task_error(drive, rq, __FUNCTION__, stat);
451                 task_end_request(drive, rq, stat);
452                 return ide_stopped;
453         }
454
455         /* Still data left to transfer. */
456         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
457
458         return ide_started;
459 }
460
461 /*
462  * Handler for command with PIO data-out phase (Write/Write Multiple).
463  */
464 static ide_startstop_t task_out_intr (ide_drive_t *drive)
465 {
466         ide_hwif_t *hwif = drive->hwif;
467         struct request *rq = HWGROUP(drive)->rq;
468         u8 stat = hwif->INB(IDE_STATUS_REG);
469
470         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
471                 return task_error(drive, rq, __FUNCTION__, stat);
472
473         /* Deal with unexpected ATA data phase. */
474         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
475                 return task_error(drive, rq, __FUNCTION__, stat);
476
477         if (!hwif->nleft) {
478                 task_end_request(drive, rq, stat);
479                 return ide_stopped;
480         }
481
482         /* Still data left to transfer. */
483         ide_pio_datablock(drive, rq, 1);
484         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
485
486         return ide_started;
487 }
488
489 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
490 {
491         ide_startstop_t startstop;
492
493         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
494                           drive->bad_wstat, WAIT_DRQ)) {
495                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
496                                 drive->name,
497                                 drive->hwif->data_phase ? "MULT" : "",
498                                 drive->addressing ? "_EXT" : "");
499                 return startstop;
500         }
501
502         if (!drive->unmask)
503                 local_irq_disable();
504
505         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
506         ide_pio_datablock(drive, rq, 1);
507
508         return ide_started;
509 }
510
511 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
512 {
513         struct request rq;
514
515         memset(&rq, 0, sizeof(rq));
516         rq.ref_count = 1;
517         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
518         rq.buffer = buf;
519
520         /*
521          * (ks) We transfer currently only whole sectors.
522          * This is suffient for now.  But, it would be great,
523          * if we would find a solution to transfer any size.
524          * To support special commands like READ LONG.
525          */
526         rq.hard_nr_sectors = rq.nr_sectors = nsect;
527         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
528
529         if (task->tf_flags & IDE_TFLAG_WRITE)
530                 rq.cmd_flags |= REQ_RW;
531
532         rq.special = task;
533         task->rq = &rq;
534
535         return ide_do_drive_cmd(drive, &rq, ide_wait);
536 }
537
538 EXPORT_SYMBOL(ide_raw_taskfile);
539
540 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
541 {
542         task->data_phase = TASKFILE_NO_DATA;
543
544         return ide_raw_taskfile(drive, task, NULL, 0);
545 }
546 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
547
548 #ifdef CONFIG_IDE_TASK_IOCTL
549 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
550 {
551         ide_task_request_t      *req_task;
552         ide_task_t              args;
553         u8 *outbuf              = NULL;
554         u8 *inbuf               = NULL;
555         u8 *data_buf            = NULL;
556         int err                 = 0;
557         int tasksize            = sizeof(struct ide_task_request_s);
558         unsigned int taskin     = 0;
559         unsigned int taskout    = 0;
560         u16 nsect               = 0;
561         char __user *buf = (char __user *)arg;
562
563 //      printk("IDE Taskfile ...\n");
564
565         req_task = kzalloc(tasksize, GFP_KERNEL);
566         if (req_task == NULL) return -ENOMEM;
567         if (copy_from_user(req_task, buf, tasksize)) {
568                 kfree(req_task);
569                 return -EFAULT;
570         }
571
572         taskout = req_task->out_size;
573         taskin  = req_task->in_size;
574         
575         if (taskin > 65536 || taskout > 65536) {
576                 err = -EINVAL;
577                 goto abort;
578         }
579
580         if (taskout) {
581                 int outtotal = tasksize;
582                 outbuf = kzalloc(taskout, GFP_KERNEL);
583                 if (outbuf == NULL) {
584                         err = -ENOMEM;
585                         goto abort;
586                 }
587                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
588                         err = -EFAULT;
589                         goto abort;
590                 }
591         }
592
593         if (taskin) {
594                 int intotal = tasksize + taskout;
595                 inbuf = kzalloc(taskin, GFP_KERNEL);
596                 if (inbuf == NULL) {
597                         err = -ENOMEM;
598                         goto abort;
599                 }
600                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
601                         err = -EFAULT;
602                         goto abort;
603                 }
604         }
605
606         memset(&args, 0, sizeof(ide_task_t));
607
608         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
609         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
610
611         args.data_phase = req_task->data_phase;
612
613         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
614                         IDE_TFLAG_IN_TF;
615         if (drive->addressing == 1)
616                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
617
618         if (req_task->out_flags.all) {
619                 args.tf_flags |= IDE_TFLAG_FLAGGED;
620
621                 if (req_task->out_flags.b.data)
622                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
623
624                 if (req_task->out_flags.b.nsector_hob)
625                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
626                 if (req_task->out_flags.b.sector_hob)
627                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
628                 if (req_task->out_flags.b.lcyl_hob)
629                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
630                 if (req_task->out_flags.b.hcyl_hob)
631                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
632
633                 if (req_task->out_flags.b.error_feature)
634                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
635                 if (req_task->out_flags.b.nsector)
636                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
637                 if (req_task->out_flags.b.sector)
638                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
639                 if (req_task->out_flags.b.lcyl)
640                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
641                 if (req_task->out_flags.b.hcyl)
642                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
643         } else {
644                 args.tf_flags |= IDE_TFLAG_OUT_TF;
645                 if (args.tf_flags & IDE_TFLAG_LBA48)
646                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
647         }
648
649         if (req_task->in_flags.b.data)
650                 args.tf_flags |= IDE_TFLAG_IN_DATA;
651
652         switch(req_task->data_phase) {
653                 case TASKFILE_MULTI_OUT:
654                         if (!drive->mult_count) {
655                                 /* (hs): give up if multcount is not set */
656                                 printk(KERN_ERR "%s: %s Multimode Write " \
657                                         "multcount is not set\n",
658                                         drive->name, __FUNCTION__);
659                                 err = -EPERM;
660                                 goto abort;
661                         }
662                         /* fall through */
663                 case TASKFILE_OUT:
664                         /* fall through */
665                 case TASKFILE_OUT_DMAQ:
666                 case TASKFILE_OUT_DMA:
667                         nsect = taskout / SECTOR_SIZE;
668                         data_buf = outbuf;
669                         break;
670                 case TASKFILE_MULTI_IN:
671                         if (!drive->mult_count) {
672                                 /* (hs): give up if multcount is not set */
673                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
674                                         "multcount is not set\n",
675                                         drive->name, __FUNCTION__);
676                                 err = -EPERM;
677                                 goto abort;
678                         }
679                         /* fall through */
680                 case TASKFILE_IN:
681                         /* fall through */
682                 case TASKFILE_IN_DMAQ:
683                 case TASKFILE_IN_DMA:
684                         nsect = taskin / SECTOR_SIZE;
685                         data_buf = inbuf;
686                         break;
687                 case TASKFILE_NO_DATA:
688                         break;
689                 default:
690                         err = -EFAULT;
691                         goto abort;
692         }
693
694         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
695                 nsect = 0;
696         else if (!nsect) {
697                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
698
699                 if (!nsect) {
700                         printk(KERN_ERR "%s: in/out command without data\n",
701                                         drive->name);
702                         err = -EFAULT;
703                         goto abort;
704                 }
705         }
706
707         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
708                 args.tf_flags |= IDE_TFLAG_WRITE;
709
710         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
711
712         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
713         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
714
715         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
716             req_task->in_flags.all == 0) {
717                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
718                 if (drive->addressing == 1)
719                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
720         }
721
722         if (copy_to_user(buf, req_task, tasksize)) {
723                 err = -EFAULT;
724                 goto abort;
725         }
726         if (taskout) {
727                 int outtotal = tasksize;
728                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
729                         err = -EFAULT;
730                         goto abort;
731                 }
732         }
733         if (taskin) {
734                 int intotal = tasksize + taskout;
735                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
736                         err = -EFAULT;
737                         goto abort;
738                 }
739         }
740 abort:
741         kfree(req_task);
742         kfree(outbuf);
743         kfree(inbuf);
744
745 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
746
747         return err;
748 }
749 #endif
750
751 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
752 {
753         u8 *buf = NULL;
754         int bufsize = 0, err = 0;
755         u8 args[4], xfer_rate = 0;
756         ide_task_t tfargs;
757         struct ide_taskfile *tf = &tfargs.tf;
758
759         if (NULL == (void *) arg) {
760                 struct request rq;
761
762                 ide_init_drive_cmd(&rq);
763                 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
764
765                 return ide_do_drive_cmd(drive, &rq, ide_wait);
766         }
767
768         if (copy_from_user(args, (void __user *)arg, 4))
769                 return -EFAULT;
770
771         memset(&tfargs, 0, sizeof(ide_task_t));
772         tf->feature = args[2];
773         if (args[0] == WIN_SMART) {
774                 tf->nsect = args[3];
775                 tf->lbal  = args[1];
776                 tf->lbam  = 0x4f;
777                 tf->lbah  = 0xc2;
778                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
779         } else {
780                 tf->nsect = args[1];
781                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
782                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
783         }
784         tf->command = args[0];
785         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
786
787         if (args[3]) {
788                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
789                 bufsize = SECTOR_WORDS * 4 * args[3];
790                 buf = kzalloc(bufsize, GFP_KERNEL);
791                 if (buf == NULL)
792                         return -ENOMEM;
793         }
794
795         if (set_transfer(drive, &tfargs)) {
796                 xfer_rate = args[1];
797                 if (ide_ata66_check(drive, &tfargs))
798                         goto abort;
799         }
800
801         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
802
803         args[0] = tf->status;
804         args[1] = tf->error;
805         args[2] = tf->nsect;
806
807         if (!err && xfer_rate) {
808                 /* active-retuning-calls future */
809                 ide_set_xfer_rate(drive, xfer_rate);
810                 ide_driveid_update(drive);
811         }
812 abort:
813         if (copy_to_user((void __user *)arg, &args, 4))
814                 err = -EFAULT;
815         if (buf) {
816                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
817                         err = -EFAULT;
818                 kfree(buf);
819         }
820         return err;
821 }
822
823 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
824 {
825         void __user *p = (void __user *)arg;
826         int err = 0;
827         u8 args[7];
828         ide_task_t task;
829
830         if (copy_from_user(args, p, 7))
831                 return -EFAULT;
832
833         memset(&task, 0, sizeof(task));
834         memcpy(&task.tf_array[7], &args[1], 6);
835         task.tf.command = args[0];
836         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
837
838         err = ide_no_data_taskfile(drive, &task);
839
840         args[0] = task.tf.command;
841         memcpy(&args[1], &task.tf_array[7], 6);
842
843         if (copy_to_user(p, args, 7))
844                 err = -EFAULT;
845
846         return err;
847 }