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ide: task_end_request() fix
[linux-2.6/x86.git] / drivers / ide / ide-taskfile.c
blob17c2c04672972032b57f670b9568dec3174d88e7
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 * (drive_cmd_intr() waits that long).
273 */
274 for (retries = 0; retries < 100; retries++) {
275 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
276 udelay(10);
277 else
278 break;
279 }
280
281 if (stat & BUSY_STAT)
282 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
283
284 return stat;
285 }
286
287 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
288 {
289 ide_hwif_t *hwif = drive->hwif;
290 struct scatterlist *sg = hwif->sg_table;
291 struct scatterlist *cursg = hwif->cursg;
292 struct page *page;
293 #ifdef CONFIG_HIGHMEM
294 unsigned long flags;
295 #endif
296 unsigned int offset;
297 u8 *buf;
298
299 cursg = hwif->cursg;
300 if (!cursg) {
301 cursg = sg;
302 hwif->cursg = sg;
303 }
304
305 page = sg_page(cursg);
306 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
307
308 /* get the current page and offset */
309 page = nth_page(page, (offset >> PAGE_SHIFT));
310 offset %= PAGE_SIZE;
311
312 #ifdef CONFIG_HIGHMEM
313 local_irq_save(flags);
314 #endif
315 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
316
317 hwif->nleft--;
318 hwif->cursg_ofs++;
319
320 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
321 hwif->cursg = sg_next(hwif->cursg);
322 hwif->cursg_ofs = 0;
323 }
324
325 /* do the actual data transfer */
326 if (write)
327 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
328 else
329 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
330
331 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
332 #ifdef CONFIG_HIGHMEM
333 local_irq_restore(flags);
334 #endif
335 }
336
337 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
338 {
339 unsigned int nsect;
340
341 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
342 while (nsect--)
343 ide_pio_sector(drive, write);
344 }
345
346 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
347 unsigned int write)
348 {
349 u8 saved_io_32bit = drive->io_32bit;
350
351 if (rq->bio) /* fs request */
352 rq->errors = 0;
353
354 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
355 ide_task_t *task = rq->special;
356
357 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
358 drive->io_32bit = 0;
359 }
360
361 touch_softlockup_watchdog();
362
363 switch (drive->hwif->data_phase) {
364 case TASKFILE_MULTI_IN:
365 case TASKFILE_MULTI_OUT:
366 ide_pio_multi(drive, write);
367 break;
368 default:
369 ide_pio_sector(drive, write);
370 break;
371 }
372
373 drive->io_32bit = saved_io_32bit;
374 }
375
376 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
377 const char *s, u8 stat)
378 {
379 if (rq->bio) {
380 ide_hwif_t *hwif = drive->hwif;
381 int sectors = hwif->nsect - hwif->nleft;
382
383 switch (hwif->data_phase) {
384 case TASKFILE_IN:
385 if (hwif->nleft)
386 break;
387 /* fall through */
388 case TASKFILE_OUT:
389 sectors--;
390 break;
391 case TASKFILE_MULTI_IN:
392 if (hwif->nleft)
393 break;
394 /* fall through */
395 case TASKFILE_MULTI_OUT:
396 sectors -= drive->mult_count;
397 default:
398 break;
399 }
400
401 if (sectors > 0) {
402 ide_driver_t *drv;
403
404 drv = *(ide_driver_t **)rq->rq_disk->private_data;
405 drv->end_request(drive, 1, sectors);
406 }
407 }
408 return ide_error(drive, s, stat);
409 }
410
411 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
412 {
413 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
414 u8 err = drive->hwif->INB(IDE_ERROR_REG);
415
416 ide_end_drive_cmd(drive, stat, err);
417 return;
418 }
419
420 if (rq->rq_disk) {
421 ide_driver_t *drv;
422
423 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
424 drv->end_request(drive, 1, rq->nr_sectors);
425 } else
426 ide_end_request(drive, 1, rq->nr_sectors);
427 }
428
429 /*
430 * Handler for command with PIO data-in phase (Read/Read Multiple).
431 */
432 static ide_startstop_t task_in_intr(ide_drive_t *drive)
433 {
434 ide_hwif_t *hwif = drive->hwif;
435 struct request *rq = HWGROUP(drive)->rq;
436 u8 stat = hwif->INB(IDE_STATUS_REG);
437
438 /* new way for dealing with premature shared PCI interrupts */
439 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
440 if (stat & (ERR_STAT | DRQ_STAT))
441 return task_error(drive, rq, __FUNCTION__, stat);
442 /* No data yet, so wait for another IRQ. */
443 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
444 return ide_started;
445 }
446
447 ide_pio_datablock(drive, rq, 0);
448
449 /* If it was the last datablock check status and finish transfer. */
450 if (!hwif->nleft) {
451 stat = wait_drive_not_busy(drive);
452 if (!OK_STAT(stat, 0, BAD_STAT))
453 return task_error(drive, rq, __FUNCTION__, stat);
454 task_end_request(drive, rq, stat);
455 return ide_stopped;
456 }
457
458 /* Still data left to transfer. */
459 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
460
461 return ide_started;
462 }
463
464 /*
465 * Handler for command with PIO data-out phase (Write/Write Multiple).
466 */
467 static ide_startstop_t task_out_intr (ide_drive_t *drive)
468 {
469 ide_hwif_t *hwif = drive->hwif;
470 struct request *rq = HWGROUP(drive)->rq;
471 u8 stat = hwif->INB(IDE_STATUS_REG);
472
473 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
474 return task_error(drive, rq, __FUNCTION__, stat);
475
476 /* Deal with unexpected ATA data phase. */
477 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
478 return task_error(drive, rq, __FUNCTION__, stat);
479
480 if (!hwif->nleft) {
481 task_end_request(drive, rq, stat);
482 return ide_stopped;
483 }
484
485 /* Still data left to transfer. */
486 ide_pio_datablock(drive, rq, 1);
487 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
488
489 return ide_started;
490 }
491
492 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
493 {
494 ide_startstop_t startstop;
495
496 if (ide_wait_stat(&startstop, drive, DATA_READY,
497 drive->bad_wstat, WAIT_DRQ)) {
498 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
499 drive->name,
500 drive->hwif->data_phase ? "MULT" : "",
501 drive->addressing ? "_EXT" : "");
502 return startstop;
503 }
504
505 if (!drive->unmask)
506 local_irq_disable();
507
508 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
509 ide_pio_datablock(drive, rq, 1);
510
511 return ide_started;
512 }
513
514 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
515 {
516 struct request rq;
517
518 memset(&rq, 0, sizeof(rq));
519 rq.ref_count = 1;
520 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
521 rq.buffer = buf;
522
523 /*
524 * (ks) We transfer currently only whole sectors.
525 * This is suffient for now. But, it would be great,
526 * if we would find a solution to transfer any size.
527 * To support special commands like READ LONG.
528 */
529 rq.hard_nr_sectors = rq.nr_sectors = nsect;
530 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
531
532 if (task->tf_flags & IDE_TFLAG_WRITE)
533 rq.cmd_flags |= REQ_RW;
534
535 rq.special = task;
536 task->rq = &rq;
537
538 return ide_do_drive_cmd(drive, &rq, ide_wait);
539 }
540
541 EXPORT_SYMBOL(ide_raw_taskfile);
542
543 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
544 {
545 task->data_phase = TASKFILE_NO_DATA;
546
547 return ide_raw_taskfile(drive, task, NULL, 0);
548 }
549 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
550
551 #ifdef CONFIG_IDE_TASK_IOCTL
552 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
553 {
554 ide_task_request_t *req_task;
555 ide_task_t args;
556 u8 *outbuf = NULL;
557 u8 *inbuf = NULL;
558 u8 *data_buf = NULL;
559 int err = 0;
560 int tasksize = sizeof(struct ide_task_request_s);
561 unsigned int taskin = 0;
562 unsigned int taskout = 0;
563 u16 nsect = 0;
564 char __user *buf = (char __user *)arg;
565
566 // printk("IDE Taskfile ...\n");
567
568 req_task = kzalloc(tasksize, GFP_KERNEL);
569 if (req_task == NULL) return -ENOMEM;
570 if (copy_from_user(req_task, buf, tasksize)) {
571 kfree(req_task);
572 return -EFAULT;
573 }
574
575 taskout = req_task->out_size;
576 taskin = req_task->in_size;
577
578 if (taskin > 65536 || taskout > 65536) {
579 err = -EINVAL;
580 goto abort;
581 }
582
583 if (taskout) {
584 int outtotal = tasksize;
585 outbuf = kzalloc(taskout, GFP_KERNEL);
586 if (outbuf == NULL) {
587 err = -ENOMEM;
588 goto abort;
589 }
590 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
591 err = -EFAULT;
592 goto abort;
593 }
594 }
595
596 if (taskin) {
597 int intotal = tasksize + taskout;
598 inbuf = kzalloc(taskin, GFP_KERNEL);
599 if (inbuf == NULL) {
600 err = -ENOMEM;
601 goto abort;
602 }
603 if (copy_from_user(inbuf, buf + intotal, taskin)) {
604 err = -EFAULT;
605 goto abort;
606 }
607 }
608
609 memset(&args, 0, sizeof(ide_task_t));
610
611 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
612 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
613
614 args.data_phase = req_task->data_phase;
615
616 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
617 IDE_TFLAG_IN_TF;
618 if (drive->addressing == 1)
619 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
620
621 if (req_task->out_flags.all) {
622 args.tf_flags |= IDE_TFLAG_FLAGGED;
623
624 if (req_task->out_flags.b.data)
625 args.tf_flags |= IDE_TFLAG_OUT_DATA;
626
627 if (req_task->out_flags.b.nsector_hob)
628 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
629 if (req_task->out_flags.b.sector_hob)
630 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
631 if (req_task->out_flags.b.lcyl_hob)
632 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
633 if (req_task->out_flags.b.hcyl_hob)
634 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
635
636 if (req_task->out_flags.b.error_feature)
637 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
638 if (req_task->out_flags.b.nsector)
639 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
640 if (req_task->out_flags.b.sector)
641 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
642 if (req_task->out_flags.b.lcyl)
643 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
644 if (req_task->out_flags.b.hcyl)
645 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
646 } else {
647 args.tf_flags |= IDE_TFLAG_OUT_TF;
648 if (args.tf_flags & IDE_TFLAG_LBA48)
649 args.tf_flags |= IDE_TFLAG_OUT_HOB;
650 }
651
652 if (req_task->in_flags.b.data)
653 args.tf_flags |= IDE_TFLAG_IN_DATA;
654
655 switch(req_task->data_phase) {
656 case TASKFILE_MULTI_OUT:
657 if (!drive->mult_count) {
658 /* (hs): give up if multcount is not set */
659 printk(KERN_ERR "%s: %s Multimode Write " \
660 "multcount is not set\n",
661 drive->name, __FUNCTION__);
662 err = -EPERM;
663 goto abort;
664 }
665 /* fall through */
666 case TASKFILE_OUT:
667 /* fall through */
668 case TASKFILE_OUT_DMAQ:
669 case TASKFILE_OUT_DMA:
670 nsect = taskout / SECTOR_SIZE;
671 data_buf = outbuf;
672 break;
673 case TASKFILE_MULTI_IN:
674 if (!drive->mult_count) {
675 /* (hs): give up if multcount is not set */
676 printk(KERN_ERR "%s: %s Multimode Read failure " \
677 "multcount is not set\n",
678 drive->name, __FUNCTION__);
679 err = -EPERM;
680 goto abort;
681 }
682 /* fall through */
683 case TASKFILE_IN:
684 /* fall through */
685 case TASKFILE_IN_DMAQ:
686 case TASKFILE_IN_DMA:
687 nsect = taskin / SECTOR_SIZE;
688 data_buf = inbuf;
689 break;
690 case TASKFILE_NO_DATA:
691 break;
692 default:
693 err = -EFAULT;
694 goto abort;
695 }
696
697 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
698 nsect = 0;
699 else if (!nsect) {
700 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
701
702 if (!nsect) {
703 printk(KERN_ERR "%s: in/out command without data\n",
704 drive->name);
705 err = -EFAULT;
706 goto abort;
707 }
708 }
709
710 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
711 args.tf_flags |= IDE_TFLAG_WRITE;
712
713 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
714
715 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
716 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
717
718 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
719 req_task->in_flags.all == 0) {
720 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
721 if (drive->addressing == 1)
722 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
723 }
724
725 if (copy_to_user(buf, req_task, tasksize)) {
726 err = -EFAULT;
727 goto abort;
728 }
729 if (taskout) {
730 int outtotal = tasksize;
731 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
732 err = -EFAULT;
733 goto abort;
734 }
735 }
736 if (taskin) {
737 int intotal = tasksize + taskout;
738 if (copy_to_user(buf + intotal, inbuf, taskin)) {
739 err = -EFAULT;
740 goto abort;
741 }
742 }
743 abort:
744 kfree(req_task);
745 kfree(outbuf);
746 kfree(inbuf);
747
748 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
749
750 return err;
751 }
752 #endif
753
754 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
755 {
756 struct request rq;
757 u8 buffer[4];
758
759 if (!buf)
760 buf = buffer;
761 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
762 ide_init_drive_cmd(&rq);
763 rq.buffer = buf;
764 *buf++ = cmd;
765 *buf++ = nsect;
766 *buf++ = feature;
767 *buf++ = sectors;
768 return ide_do_drive_cmd(drive, &rq, ide_wait);
769 }
770
771 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
772 {
773 int err = 0;
774 u8 args[4], *argbuf = args;
775 u8 xfer_rate = 0;
776 int argsize = 4;
777 ide_task_t tfargs;
778 struct ide_taskfile *tf = &tfargs.tf;
779
780 if (NULL == (void *) arg) {
781 struct request rq;
782 ide_init_drive_cmd(&rq);
783 return ide_do_drive_cmd(drive, &rq, ide_wait);
784 }
785
786 if (copy_from_user(args, (void __user *)arg, 4))
787 return -EFAULT;
788
789 memset(&tfargs, 0, sizeof(ide_task_t));
790 tf->feature = args[2];
791 tf->nsect = args[3];
792 tf->lbal = args[1];
793 tf->command = args[0];
794
795 if (args[3]) {
796 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
797 argbuf = kzalloc(argsize, GFP_KERNEL);
798 if (argbuf == NULL)
799 return -ENOMEM;
800 }
801 if (set_transfer(drive, &tfargs)) {
802 xfer_rate = args[1];
803 if (ide_ata66_check(drive, &tfargs))
804 goto abort;
805 }
806
807 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
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, argbuf, argsize))
816 err = -EFAULT;
817 if (argsize > 4)
818 kfree(argbuf);
819 return err;
820 }
821
822 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
823 {
824 void __user *p = (void __user *)arg;
825 int err = 0;
826 u8 args[7];
827 ide_task_t task;
828
829 if (copy_from_user(args, p, 7))
830 return -EFAULT;
831
832 memset(&task, 0, sizeof(task));
833 memcpy(&task.tf_array[7], &args[1], 6);
834 task.tf.command = args[0];
835 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
836
837 err = ide_no_data_taskfile(drive, &task);
838
839 args[0] = task.tf.command;
840 memcpy(&args[1], &task.tf_array[7], 6);
841
842 if (copy_to_user(p, args, 7))
843 err = -EFAULT;
844
845 return err;
846 }
x86 "subsystem" repository