ide: make wait_drive_not_busy() static again
[linux-2.6] / drivers / ide / ide-taskfile.c
1 /*
2  * linux/drivers/ide/ide-taskfile.c     Version 0.38    March 05, 2003
3  *
4  *  Copyright (C) 2000-2002     Michael Cornwell <cornwell@acm.org>
5  *  Copyright (C) 2000-2002     Andre Hedrick <andre@linux-ide.org>
6  *  Copyright (C) 2001-2002     Klaus Smolin
7  *                                      IBM Storage Technology Division
8  *  Copyright (C) 2003-2004     Bartlomiej Zolnierkiewicz
9  *
10  *  The big the bad and the ugly.
11  */
12
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/timer.h>
18 #include <linux/mm.h>
19 #include <linux/sched.h>
20 #include <linux/interrupt.h>
21 #include <linux/major.h>
22 #include <linux/errno.h>
23 #include <linux/genhd.h>
24 #include <linux/blkpg.h>
25 #include <linux/slab.h>
26 #include <linux/pci.h>
27 #include <linux/delay.h>
28 #include <linux/hdreg.h>
29 #include <linux/ide.h>
30 #include <linux/bitops.h>
31 #include <linux/scatterlist.h>
32
33 #include <asm/byteorder.h>
34 #include <asm/irq.h>
35 #include <asm/uaccess.h>
36 #include <asm/io.h>
37
38 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
39 {
40         ide_hwif_t *hwif = drive->hwif;
41         struct ide_taskfile *tf = &task->tf;
42         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
43
44         if (task->tf_flags & IDE_TFLAG_FLAGGED)
45                 HIHI = 0xFF;
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                 drive->name, tf->feature, tf->nsect, tf->lbal,
51                 tf->lbam, tf->lbah, tf->device, tf->command);
52         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
53                 "lbam 0x%02x lbah 0x%02x\n",
54                 drive->name, tf->hob_nsect, tf->hob_lbal,
55                 tf->hob_lbam, tf->hob_lbah);
56 #endif
57
58         ide_set_irq(drive, 1);
59
60         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
61                 SELECT_MASK(drive, 0);
62
63         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
64                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
65
66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
67                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
69                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
70         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
71                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
72         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
73                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
74         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
75                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
76
77         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
78                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
79         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
80                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
81         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
82                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
83         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
84                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
85         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
86                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
87
88         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
89                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
90 }
91
92 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
93 {
94         ide_task_t args;
95
96         memset(&args, 0, sizeof(ide_task_t));
97         args.tf.nsect = 0x01;
98         if (drive->media == ide_disk)
99                 args.tf.command = WIN_IDENTIFY;
100         else
101                 args.tf.command = WIN_PIDENTIFY;
102         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
103         args.data_phase = TASKFILE_IN;
104         return ide_raw_taskfile(drive, &args, buf, 1);
105 }
106
107 static int inline task_dma_ok(ide_task_t *task)
108 {
109         if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
110                 return 1;
111
112         switch (task->tf.command) {
113                 case WIN_WRITEDMA_ONCE:
114                 case WIN_WRITEDMA:
115                 case WIN_WRITEDMA_EXT:
116                 case WIN_READDMA_ONCE:
117                 case WIN_READDMA:
118                 case WIN_READDMA_EXT:
119                 case WIN_IDENTIFY_DMA:
120                         return 1;
121         }
122
123         return 0;
124 }
125
126 static ide_startstop_t task_no_data_intr(ide_drive_t *);
127 static ide_startstop_t set_geometry_intr(ide_drive_t *);
128 static ide_startstop_t recal_intr(ide_drive_t *);
129 static ide_startstop_t set_multmode_intr(ide_drive_t *);
130 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
131 static ide_startstop_t task_in_intr(ide_drive_t *);
132
133 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
134 {
135         ide_hwif_t *hwif        = HWIF(drive);
136         struct ide_taskfile *tf = &task->tf;
137         ide_handler_t *handler = NULL;
138
139         if (task->data_phase == TASKFILE_MULTI_IN ||
140             task->data_phase == TASKFILE_MULTI_OUT) {
141                 if (!drive->mult_count) {
142                         printk(KERN_ERR "%s: multimode not set!\n",
143                                         drive->name);
144                         return ide_stopped;
145                 }
146         }
147
148         if (task->tf_flags & IDE_TFLAG_FLAGGED)
149                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
150
151         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
152                 ide_tf_load(drive, task);
153
154         switch (task->data_phase) {
155         case TASKFILE_MULTI_OUT:
156         case TASKFILE_OUT:
157                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
158                 ndelay(400);    /* FIXME */
159                 return pre_task_out_intr(drive, task->rq);
160         case TASKFILE_MULTI_IN:
161         case TASKFILE_IN:
162                 handler = task_in_intr;
163                 /* fall-through */
164         case TASKFILE_NO_DATA:
165                 if (handler == NULL)
166                         handler = task_no_data_intr;
167                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
168                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
169                         switch (tf->command) {
170                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
171                         case WIN_RESTORE: handler = recal_intr;         break;
172                         case WIN_SETMULT: handler = set_multmode_intr;  break;
173                         }
174                 }
175                 ide_execute_command(drive, tf->command, handler,
176                                     WAIT_WORSTCASE, NULL);
177                 return ide_started;
178         default:
179                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
180                     hwif->dma_setup(drive))
181                         return ide_stopped;
182                 hwif->dma_exec_cmd(drive, tf->command);
183                 hwif->dma_start(drive);
184                 return ide_started;
185         }
186 }
187 EXPORT_SYMBOL_GPL(do_rw_taskfile);
188
189 /*
190  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
191  */
192 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
193 {
194         ide_hwif_t *hwif = HWIF(drive);
195         u8 stat;
196
197         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
198                 drive->mult_count = drive->mult_req;
199         } else {
200                 drive->mult_req = drive->mult_count = 0;
201                 drive->special.b.recalibrate = 1;
202                 (void) ide_dump_status(drive, "set_multmode", stat);
203         }
204         return ide_stopped;
205 }
206
207 /*
208  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
209  */
210 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
211 {
212         ide_hwif_t *hwif = HWIF(drive);
213         int retries = 5;
214         u8 stat;
215
216         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
217                 udelay(10);
218
219         if (OK_STAT(stat, READY_STAT, BAD_STAT))
220                 return ide_stopped;
221
222         if (stat & (ERR_STAT|DRQ_STAT))
223                 return ide_error(drive, "set_geometry_intr", stat);
224
225         BUG_ON(HWGROUP(drive)->handler != NULL);
226         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
227         return ide_started;
228 }
229
230 /*
231  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
232  */
233 static ide_startstop_t recal_intr(ide_drive_t *drive)
234 {
235         ide_hwif_t *hwif = HWIF(drive);
236         u8 stat;
237
238         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
239                 return ide_error(drive, "recal_intr", stat);
240         return ide_stopped;
241 }
242
243 /*
244  * Handler for commands without a data phase
245  */
246 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
247 {
248         ide_task_t *args        = HWGROUP(drive)->rq->special;
249         ide_hwif_t *hwif        = HWIF(drive);
250         u8 stat;
251
252         local_irq_enable_in_hardirq();
253         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
254                 return ide_error(drive, "task_no_data_intr", stat);
255                 /* calls ide_end_drive_cmd */
256         }
257         if (args)
258                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
259
260         return ide_stopped;
261 }
262
263 static u8 wait_drive_not_busy(ide_drive_t *drive)
264 {
265         ide_hwif_t *hwif = HWIF(drive);
266         int retries;
267         u8 stat;
268
269         /*
270          * Last sector was transfered, wait until drive is ready.
271          * This can take up to 10 usec, but we will wait max 1 ms.
272          */
273         for (retries = 0; retries < 100; retries++) {
274                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
275                         udelay(10);
276                 else
277                         break;
278         }
279
280         if (stat & BUSY_STAT)
281                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
282
283         return stat;
284 }
285
286 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
287 {
288         ide_hwif_t *hwif = drive->hwif;
289         struct scatterlist *sg = hwif->sg_table;
290         struct scatterlist *cursg = hwif->cursg;
291         struct page *page;
292 #ifdef CONFIG_HIGHMEM
293         unsigned long flags;
294 #endif
295         unsigned int offset;
296         u8 *buf;
297
298         cursg = hwif->cursg;
299         if (!cursg) {
300                 cursg = sg;
301                 hwif->cursg = sg;
302         }
303
304         page = sg_page(cursg);
305         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
306
307         /* get the current page and offset */
308         page = nth_page(page, (offset >> PAGE_SHIFT));
309         offset %= PAGE_SIZE;
310
311 #ifdef CONFIG_HIGHMEM
312         local_irq_save(flags);
313 #endif
314         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
315
316         hwif->nleft--;
317         hwif->cursg_ofs++;
318
319         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
320                 hwif->cursg = sg_next(hwif->cursg);
321                 hwif->cursg_ofs = 0;
322         }
323
324         /* do the actual data transfer */
325         if (write)
326                 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
327         else
328                 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
329
330         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
331 #ifdef CONFIG_HIGHMEM
332         local_irq_restore(flags);
333 #endif
334 }
335
336 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
337 {
338         unsigned int nsect;
339
340         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
341         while (nsect--)
342                 ide_pio_sector(drive, write);
343 }
344
345 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
346                                      unsigned int write)
347 {
348         u8 saved_io_32bit = drive->io_32bit;
349
350         if (rq->bio)    /* fs request */
351                 rq->errors = 0;
352
353         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
354                 ide_task_t *task = rq->special;
355
356                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
357                         drive->io_32bit = 0;
358         }
359
360         touch_softlockup_watchdog();
361
362         switch (drive->hwif->data_phase) {
363         case TASKFILE_MULTI_IN:
364         case TASKFILE_MULTI_OUT:
365                 ide_pio_multi(drive, write);
366                 break;
367         default:
368                 ide_pio_sector(drive, write);
369                 break;
370         }
371
372         drive->io_32bit = saved_io_32bit;
373 }
374
375 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
376                                   const char *s, u8 stat)
377 {
378         if (rq->bio) {
379                 ide_hwif_t *hwif = drive->hwif;
380                 int sectors = hwif->nsect - hwif->nleft;
381
382                 switch (hwif->data_phase) {
383                 case TASKFILE_IN:
384                         if (hwif->nleft)
385                                 break;
386                         /* fall through */
387                 case TASKFILE_OUT:
388                         sectors--;
389                         break;
390                 case TASKFILE_MULTI_IN:
391                         if (hwif->nleft)
392                                 break;
393                         /* fall through */
394                 case TASKFILE_MULTI_OUT:
395                         sectors -= drive->mult_count;
396                 default:
397                         break;
398                 }
399
400                 if (sectors > 0) {
401                         ide_driver_t *drv;
402
403                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
404                         drv->end_request(drive, 1, sectors);
405                 }
406         }
407         return ide_error(drive, s, stat);
408 }
409
410 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
411 {
412         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
413                 u8 err = drive->hwif->INB(IDE_ERROR_REG);
414
415                 ide_end_drive_cmd(drive, stat, err);
416                 return;
417         }
418
419         if (rq->rq_disk) {
420                 ide_driver_t *drv;
421
422                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
423                 drv->end_request(drive, 1, rq->nr_sectors);
424         } else
425                 ide_end_request(drive, 1, rq->nr_sectors);
426 }
427
428 /*
429  * Handler for command with PIO data-in phase (Read/Read Multiple).
430  */
431 static ide_startstop_t task_in_intr(ide_drive_t *drive)
432 {
433         ide_hwif_t *hwif = drive->hwif;
434         struct request *rq = HWGROUP(drive)->rq;
435         u8 stat = hwif->INB(IDE_STATUS_REG);
436
437         /* new way for dealing with premature shared PCI interrupts */
438         if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
439                 if (stat & (ERR_STAT | DRQ_STAT))
440                         return task_error(drive, rq, __FUNCTION__, stat);
441                 /* No data yet, so wait for another IRQ. */
442                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
443                 return ide_started;
444         }
445
446         ide_pio_datablock(drive, rq, 0);
447
448         /* If it was the last datablock check status and finish transfer. */
449         if (!hwif->nleft) {
450                 stat = wait_drive_not_busy(drive);
451                 if (!OK_STAT(stat, 0, BAD_STAT))
452                         return task_error(drive, rq, __FUNCTION__, stat);
453                 task_end_request(drive, rq, stat);
454                 return ide_stopped;
455         }
456
457         /* Still data left to transfer. */
458         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
459
460         return ide_started;
461 }
462
463 /*
464  * Handler for command with PIO data-out phase (Write/Write Multiple).
465  */
466 static ide_startstop_t task_out_intr (ide_drive_t *drive)
467 {
468         ide_hwif_t *hwif = drive->hwif;
469         struct request *rq = HWGROUP(drive)->rq;
470         u8 stat = hwif->INB(IDE_STATUS_REG);
471
472         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
473                 return task_error(drive, rq, __FUNCTION__, stat);
474
475         /* Deal with unexpected ATA data phase. */
476         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
477                 return task_error(drive, rq, __FUNCTION__, stat);
478
479         if (!hwif->nleft) {
480                 task_end_request(drive, rq, stat);
481                 return ide_stopped;
482         }
483
484         /* Still data left to transfer. */
485         ide_pio_datablock(drive, rq, 1);
486         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
487
488         return ide_started;
489 }
490
491 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
492 {
493         ide_startstop_t startstop;
494
495         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
496                           drive->bad_wstat, WAIT_DRQ)) {
497                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
498                                 drive->name,
499                                 drive->hwif->data_phase ? "MULT" : "",
500                                 drive->addressing ? "_EXT" : "");
501                 return startstop;
502         }
503
504         if (!drive->unmask)
505                 local_irq_disable();
506
507         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
508         ide_pio_datablock(drive, rq, 1);
509
510         return ide_started;
511 }
512
513 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
514 {
515         struct request rq;
516
517         memset(&rq, 0, sizeof(rq));
518         rq.ref_count = 1;
519         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
520         rq.buffer = buf;
521
522         /*
523          * (ks) We transfer currently only whole sectors.
524          * This is suffient for now.  But, it would be great,
525          * if we would find a solution to transfer any size.
526          * To support special commands like READ LONG.
527          */
528         rq.hard_nr_sectors = rq.nr_sectors = nsect;
529         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
530
531         if (task->tf_flags & IDE_TFLAG_WRITE)
532                 rq.cmd_flags |= REQ_RW;
533
534         rq.special = task;
535         task->rq = &rq;
536
537         return ide_do_drive_cmd(drive, &rq, ide_wait);
538 }
539
540 EXPORT_SYMBOL(ide_raw_taskfile);
541
542 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
543 {
544         task->data_phase = TASKFILE_NO_DATA;
545
546         return ide_raw_taskfile(drive, task, NULL, 0);
547 }
548 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
549
550 #ifdef CONFIG_IDE_TASK_IOCTL
551 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
552 {
553         ide_task_request_t      *req_task;
554         ide_task_t              args;
555         u8 *outbuf              = NULL;
556         u8 *inbuf               = NULL;
557         u8 *data_buf            = NULL;
558         int err                 = 0;
559         int tasksize            = sizeof(struct ide_task_request_s);
560         unsigned int taskin     = 0;
561         unsigned int taskout    = 0;
562         u16 nsect               = 0;
563         char __user *buf = (char __user *)arg;
564
565 //      printk("IDE Taskfile ...\n");
566
567         req_task = kzalloc(tasksize, GFP_KERNEL);
568         if (req_task == NULL) return -ENOMEM;
569         if (copy_from_user(req_task, buf, tasksize)) {
570                 kfree(req_task);
571                 return -EFAULT;
572         }
573
574         taskout = req_task->out_size;
575         taskin  = req_task->in_size;
576         
577         if (taskin > 65536 || taskout > 65536) {
578                 err = -EINVAL;
579                 goto abort;
580         }
581
582         if (taskout) {
583                 int outtotal = tasksize;
584                 outbuf = kzalloc(taskout, GFP_KERNEL);
585                 if (outbuf == NULL) {
586                         err = -ENOMEM;
587                         goto abort;
588                 }
589                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
590                         err = -EFAULT;
591                         goto abort;
592                 }
593         }
594
595         if (taskin) {
596                 int intotal = tasksize + taskout;
597                 inbuf = kzalloc(taskin, GFP_KERNEL);
598                 if (inbuf == NULL) {
599                         err = -ENOMEM;
600                         goto abort;
601                 }
602                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
603                         err = -EFAULT;
604                         goto abort;
605                 }
606         }
607
608         memset(&args, 0, sizeof(ide_task_t));
609
610         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
611         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
612
613         args.data_phase = req_task->data_phase;
614
615         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
616                         IDE_TFLAG_IN_TF;
617         if (drive->addressing == 1)
618                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
619
620         if (req_task->out_flags.all) {
621                 args.tf_flags |= IDE_TFLAG_FLAGGED;
622
623                 if (req_task->out_flags.b.data)
624                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
625
626                 if (req_task->out_flags.b.nsector_hob)
627                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
628                 if (req_task->out_flags.b.sector_hob)
629                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
630                 if (req_task->out_flags.b.lcyl_hob)
631                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
632                 if (req_task->out_flags.b.hcyl_hob)
633                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
634
635                 if (req_task->out_flags.b.error_feature)
636                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
637                 if (req_task->out_flags.b.nsector)
638                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
639                 if (req_task->out_flags.b.sector)
640                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
641                 if (req_task->out_flags.b.lcyl)
642                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
643                 if (req_task->out_flags.b.hcyl)
644                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
645         } else {
646                 args.tf_flags |= IDE_TFLAG_OUT_TF;
647                 if (args.tf_flags & IDE_TFLAG_LBA48)
648                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
649         }
650
651         if (req_task->in_flags.b.data)
652                 args.tf_flags |= IDE_TFLAG_IN_DATA;
653
654         switch(req_task->data_phase) {
655                 case TASKFILE_MULTI_OUT:
656                         if (!drive->mult_count) {
657                                 /* (hs): give up if multcount is not set */
658                                 printk(KERN_ERR "%s: %s Multimode Write " \
659                                         "multcount is not set\n",
660                                         drive->name, __FUNCTION__);
661                                 err = -EPERM;
662                                 goto abort;
663                         }
664                         /* fall through */
665                 case TASKFILE_OUT:
666                         /* fall through */
667                 case TASKFILE_OUT_DMAQ:
668                 case TASKFILE_OUT_DMA:
669                         nsect = taskout / SECTOR_SIZE;
670                         data_buf = outbuf;
671                         break;
672                 case TASKFILE_MULTI_IN:
673                         if (!drive->mult_count) {
674                                 /* (hs): give up if multcount is not set */
675                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
676                                         "multcount is not set\n",
677                                         drive->name, __FUNCTION__);
678                                 err = -EPERM;
679                                 goto abort;
680                         }
681                         /* fall through */
682                 case TASKFILE_IN:
683                         /* fall through */
684                 case TASKFILE_IN_DMAQ:
685                 case TASKFILE_IN_DMA:
686                         nsect = taskin / SECTOR_SIZE;
687                         data_buf = inbuf;
688                         break;
689                 case TASKFILE_NO_DATA:
690                         break;
691                 default:
692                         err = -EFAULT;
693                         goto abort;
694         }
695
696         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
697                 nsect = 0;
698         else if (!nsect) {
699                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
700
701                 if (!nsect) {
702                         printk(KERN_ERR "%s: in/out command without data\n",
703                                         drive->name);
704                         err = -EFAULT;
705                         goto abort;
706                 }
707         }
708
709         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
710                 args.tf_flags |= IDE_TFLAG_WRITE;
711
712         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
713
714         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
715         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
716
717         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
718             req_task->in_flags.all == 0) {
719                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
720                 if (drive->addressing == 1)
721                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
722         }
723
724         if (copy_to_user(buf, req_task, tasksize)) {
725                 err = -EFAULT;
726                 goto abort;
727         }
728         if (taskout) {
729                 int outtotal = tasksize;
730                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
731                         err = -EFAULT;
732                         goto abort;
733                 }
734         }
735         if (taskin) {
736                 int intotal = tasksize + taskout;
737                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
738                         err = -EFAULT;
739                         goto abort;
740                 }
741         }
742 abort:
743         kfree(req_task);
744         kfree(outbuf);
745         kfree(inbuf);
746
747 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
748
749         return err;
750 }
751 #endif
752
753 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
754 {
755         u8 *buf = NULL;
756         int bufsize = 0, err = 0;
757         u8 args[4], xfer_rate = 0;
758         ide_task_t tfargs;
759         struct ide_taskfile *tf = &tfargs.tf;
760
761         if (NULL == (void *) arg) {
762                 struct request rq;
763
764                 ide_init_drive_cmd(&rq);
765                 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
766
767                 return ide_do_drive_cmd(drive, &rq, ide_wait);
768         }
769
770         if (copy_from_user(args, (void __user *)arg, 4))
771                 return -EFAULT;
772
773         memset(&tfargs, 0, sizeof(ide_task_t));
774         tf->feature = args[2];
775         if (args[0] == WIN_SMART) {
776                 tf->nsect = args[3];
777                 tf->lbal  = args[1];
778                 tf->lbam  = 0x4f;
779                 tf->lbah  = 0xc2;
780                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
781         } else {
782                 tf->nsect = args[1];
783                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
784                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
785         }
786         tf->command = args[0];
787         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
788
789         if (args[3]) {
790                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
791                 bufsize = SECTOR_WORDS * 4 * args[3];
792                 buf = kzalloc(bufsize, GFP_KERNEL);
793                 if (buf == NULL)
794                         return -ENOMEM;
795         }
796
797         if (set_transfer(drive, &tfargs)) {
798                 xfer_rate = args[1];
799                 if (ide_ata66_check(drive, &tfargs))
800                         goto abort;
801         }
802
803         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
804
805         args[0] = tf->status;
806         args[1] = tf->error;
807         args[2] = tf->nsect;
808
809         if (!err && xfer_rate) {
810                 /* active-retuning-calls future */
811                 ide_set_xfer_rate(drive, xfer_rate);
812                 ide_driveid_update(drive);
813         }
814 abort:
815         if (copy_to_user((void __user *)arg, &args, 4))
816                 err = -EFAULT;
817         if (buf) {
818                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
819                         err = -EFAULT;
820                 kfree(buf);
821         }
822         return err;
823 }
824
825 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
826 {
827         void __user *p = (void __user *)arg;
828         int err = 0;
829         u8 args[7];
830         ide_task_t task;
831
832         if (copy_from_user(args, p, 7))
833                 return -EFAULT;
834
835         memset(&task, 0, sizeof(task));
836         memcpy(&task.tf_array[7], &args[1], 6);
837         task.tf.command = args[0];
838         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
839
840         err = ide_no_data_taskfile(drive, &task);
841
842         args[0] = task.tf.command;
843         memcpy(&args[1], &task.tf_array[7], 6);
844
845         if (copy_to_user(p, args, 7))
846                 err = -EFAULT;
847
848         return err;
849 }