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sched: make early bootup sched_clock() use safer
[wrt350n-kernel.git] / drivers / ide / ide-taskfile.c
blob0518a2e948cf46f9317f8ef27e4a4121c6df08ae
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/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 u8 stat = ide_read_status(drive);
193
194 if (OK_STAT(stat, READY_STAT, BAD_STAT))
195 drive->mult_count = drive->mult_req;
196 else {
197 drive->mult_req = drive->mult_count = 0;
198 drive->special.b.recalibrate = 1;
199 (void) ide_dump_status(drive, "set_multmode", stat);
200 }
201 return ide_stopped;
202 }
203
204 /*
205 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
206 */
207 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
208 {
209 int retries = 5;
210 u8 stat;
211
212 while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
213 udelay(10);
214
215 if (OK_STAT(stat, READY_STAT, BAD_STAT))
216 return ide_stopped;
217
218 if (stat & (ERR_STAT|DRQ_STAT))
219 return ide_error(drive, "set_geometry_intr", stat);
220
221 BUG_ON(HWGROUP(drive)->handler != NULL);
222 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
223 return ide_started;
224 }
225
226 /*
227 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
228 */
229 static ide_startstop_t recal_intr(ide_drive_t *drive)
230 {
231 u8 stat = ide_read_status(drive);
232
233 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
234 return ide_error(drive, "recal_intr", stat);
235 return ide_stopped;
236 }
237
238 /*
239 * Handler for commands without a data phase
240 */
241 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
242 {
243 ide_task_t *args = HWGROUP(drive)->rq->special;
244 u8 stat;
245
246 local_irq_enable_in_hardirq();
247 stat = ide_read_status(drive);
248
249 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
250 return ide_error(drive, "task_no_data_intr", stat);
251 /* calls ide_end_drive_cmd */
252
253 if (args)
254 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
255
256 return ide_stopped;
257 }
258
259 static u8 wait_drive_not_busy(ide_drive_t *drive)
260 {
261 int retries;
262 u8 stat;
263
264 /*
265 * Last sector was transfered, wait until drive is ready.
266 * This can take up to 10 usec, but we will wait max 1 ms.
267 */
268 for (retries = 0; retries < 100; retries++) {
269 stat = ide_read_status(drive);
270
271 if (stat & BUSY_STAT)
272 udelay(10);
273 else
274 break;
275 }
276
277 if (stat & BUSY_STAT)
278 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
279
280 return stat;
281 }
282
283 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
284 {
285 ide_hwif_t *hwif = drive->hwif;
286 struct scatterlist *sg = hwif->sg_table;
287 struct scatterlist *cursg = hwif->cursg;
288 struct page *page;
289 #ifdef CONFIG_HIGHMEM
290 unsigned long flags;
291 #endif
292 unsigned int offset;
293 u8 *buf;
294
295 cursg = hwif->cursg;
296 if (!cursg) {
297 cursg = sg;
298 hwif->cursg = sg;
299 }
300
301 page = sg_page(cursg);
302 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
303
304 /* get the current page and offset */
305 page = nth_page(page, (offset >> PAGE_SHIFT));
306 offset %= PAGE_SIZE;
307
308 #ifdef CONFIG_HIGHMEM
309 local_irq_save(flags);
310 #endif
311 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
312
313 hwif->nleft--;
314 hwif->cursg_ofs++;
315
316 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
317 hwif->cursg = sg_next(hwif->cursg);
318 hwif->cursg_ofs = 0;
319 }
320
321 /* do the actual data transfer */
322 if (write)
323 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
324 else
325 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
326
327 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
328 #ifdef CONFIG_HIGHMEM
329 local_irq_restore(flags);
330 #endif
331 }
332
333 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
334 {
335 unsigned int nsect;
336
337 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
338 while (nsect--)
339 ide_pio_sector(drive, write);
340 }
341
342 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
343 unsigned int write)
344 {
345 u8 saved_io_32bit = drive->io_32bit;
346
347 if (rq->bio) /* fs request */
348 rq->errors = 0;
349
350 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
351 ide_task_t *task = rq->special;
352
353 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
354 drive->io_32bit = 0;
355 }
356
357 touch_softlockup_watchdog();
358
359 switch (drive->hwif->data_phase) {
360 case TASKFILE_MULTI_IN:
361 case TASKFILE_MULTI_OUT:
362 ide_pio_multi(drive, write);
363 break;
364 default:
365 ide_pio_sector(drive, write);
366 break;
367 }
368
369 drive->io_32bit = saved_io_32bit;
370 }
371
372 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
373 const char *s, u8 stat)
374 {
375 if (rq->bio) {
376 ide_hwif_t *hwif = drive->hwif;
377 int sectors = hwif->nsect - hwif->nleft;
378
379 switch (hwif->data_phase) {
380 case TASKFILE_IN:
381 if (hwif->nleft)
382 break;
383 /* fall through */
384 case TASKFILE_OUT:
385 sectors--;
386 break;
387 case TASKFILE_MULTI_IN:
388 if (hwif->nleft)
389 break;
390 /* fall through */
391 case TASKFILE_MULTI_OUT:
392 sectors -= drive->mult_count;
393 default:
394 break;
395 }
396
397 if (sectors > 0) {
398 ide_driver_t *drv;
399
400 drv = *(ide_driver_t **)rq->rq_disk->private_data;
401 drv->end_request(drive, 1, sectors);
402 }
403 }
404 return ide_error(drive, s, stat);
405 }
406
407 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
408 {
409 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
410 u8 err = ide_read_error(drive);
411
412 ide_end_drive_cmd(drive, stat, err);
413 return;
414 }
415
416 if (rq->rq_disk) {
417 ide_driver_t *drv;
418
419 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
420 drv->end_request(drive, 1, rq->nr_sectors);
421 } else
422 ide_end_request(drive, 1, rq->nr_sectors);
423 }
424
425 /*
426 * Handler for command with PIO data-in phase (Read/Read Multiple).
427 */
428 static ide_startstop_t task_in_intr(ide_drive_t *drive)
429 {
430 ide_hwif_t *hwif = drive->hwif;
431 struct request *rq = HWGROUP(drive)->rq;
432 u8 stat = ide_read_status(drive);
433
434 /* new way for dealing with premature shared PCI interrupts */
435 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
436 if (stat & (ERR_STAT | DRQ_STAT))
437 return task_error(drive, rq, __FUNCTION__, stat);
438 /* No data yet, so wait for another IRQ. */
439 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
440 return ide_started;
441 }
442
443 ide_pio_datablock(drive, rq, 0);
444
445 /* If it was the last datablock check status and finish transfer. */
446 if (!hwif->nleft) {
447 stat = wait_drive_not_busy(drive);
448 if (!OK_STAT(stat, 0, BAD_STAT))
449 return task_error(drive, rq, __FUNCTION__, stat);
450 task_end_request(drive, rq, stat);
451 return ide_stopped;
452 }
453
454 /* Still data left to transfer. */
455 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
456
457 return ide_started;
458 }
459
460 /*
461 * Handler for command with PIO data-out phase (Write/Write Multiple).
462 */
463 static ide_startstop_t task_out_intr (ide_drive_t *drive)
464 {
465 ide_hwif_t *hwif = drive->hwif;
466 struct request *rq = HWGROUP(drive)->rq;
467 u8 stat = ide_read_status(drive);
468
469 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
470 return task_error(drive, rq, __FUNCTION__, stat);
471
472 /* Deal with unexpected ATA data phase. */
473 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
474 return task_error(drive, rq, __FUNCTION__, stat);
475
476 if (!hwif->nleft) {
477 task_end_request(drive, rq, stat);
478 return ide_stopped;
479 }
480
481 /* Still data left to transfer. */
482 ide_pio_datablock(drive, rq, 1);
483 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
484
485 return ide_started;
486 }
487
488 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
489 {
490 ide_startstop_t startstop;
491
492 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
493 drive->bad_wstat, WAIT_DRQ)) {
494 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
495 drive->name,
496 drive->hwif->data_phase ? "MULT" : "",
497 drive->addressing ? "_EXT" : "");
498 return startstop;
499 }
500
501 if (!drive->unmask)
502 local_irq_disable();
503
504 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
505 ide_pio_datablock(drive, rq, 1);
506
507 return ide_started;
508 }
509
510 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
511 {
512 struct request rq;
513
514 memset(&rq, 0, sizeof(rq));
515 rq.ref_count = 1;
516 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
517 rq.buffer = buf;
518
519 /*
520 * (ks) We transfer currently only whole sectors.
521 * This is suffient for now. But, it would be great,
522 * if we would find a solution to transfer any size.
523 * To support special commands like READ LONG.
524 */
525 rq.hard_nr_sectors = rq.nr_sectors = nsect;
526 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
527
528 if (task->tf_flags & IDE_TFLAG_WRITE)
529 rq.cmd_flags |= REQ_RW;
530
531 rq.special = task;
532 task->rq = &rq;
533
534 return ide_do_drive_cmd(drive, &rq, ide_wait);
535 }
536
537 EXPORT_SYMBOL(ide_raw_taskfile);
538
539 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
540 {
541 task->data_phase = TASKFILE_NO_DATA;
542
543 return ide_raw_taskfile(drive, task, NULL, 0);
544 }
545 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
546
547 #ifdef CONFIG_IDE_TASK_IOCTL
548 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
549 {
550 ide_task_request_t *req_task;
551 ide_task_t args;
552 u8 *outbuf = NULL;
553 u8 *inbuf = NULL;
554 u8 *data_buf = NULL;
555 int err = 0;
556 int tasksize = sizeof(struct ide_task_request_s);
557 unsigned int taskin = 0;
558 unsigned int taskout = 0;
559 u16 nsect = 0;
560 char __user *buf = (char __user *)arg;
561
562 // printk("IDE Taskfile ...\n");
563
564 req_task = kzalloc(tasksize, GFP_KERNEL);
565 if (req_task == NULL) return -ENOMEM;
566 if (copy_from_user(req_task, buf, tasksize)) {
567 kfree(req_task);
568 return -EFAULT;
569 }
570
571 taskout = req_task->out_size;
572 taskin = req_task->in_size;
573
574 if (taskin > 65536 || taskout > 65536) {
575 err = -EINVAL;
576 goto abort;
577 }
578
579 if (taskout) {
580 int outtotal = tasksize;
581 outbuf = kzalloc(taskout, GFP_KERNEL);
582 if (outbuf == NULL) {
583 err = -ENOMEM;
584 goto abort;
585 }
586 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
587 err = -EFAULT;
588 goto abort;
589 }
590 }
591
592 if (taskin) {
593 int intotal = tasksize + taskout;
594 inbuf = kzalloc(taskin, GFP_KERNEL);
595 if (inbuf == NULL) {
596 err = -ENOMEM;
597 goto abort;
598 }
599 if (copy_from_user(inbuf, buf + intotal, taskin)) {
600 err = -EFAULT;
601 goto abort;
602 }
603 }
604
605 memset(&args, 0, sizeof(ide_task_t));
606
607 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
608 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
609
610 args.data_phase = req_task->data_phase;
611
612 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
613 IDE_TFLAG_IN_TF;
614 if (drive->addressing == 1)
615 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
616
617 if (req_task->out_flags.all) {
618 args.tf_flags |= IDE_TFLAG_FLAGGED;
619
620 if (req_task->out_flags.b.data)
621 args.tf_flags |= IDE_TFLAG_OUT_DATA;
622
623 if (req_task->out_flags.b.nsector_hob)
624 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
625 if (req_task->out_flags.b.sector_hob)
626 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
627 if (req_task->out_flags.b.lcyl_hob)
628 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
629 if (req_task->out_flags.b.hcyl_hob)
630 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
631
632 if (req_task->out_flags.b.error_feature)
633 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
634 if (req_task->out_flags.b.nsector)
635 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
636 if (req_task->out_flags.b.sector)
637 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
638 if (req_task->out_flags.b.lcyl)
639 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
640 if (req_task->out_flags.b.hcyl)
641 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
642 } else {
643 args.tf_flags |= IDE_TFLAG_OUT_TF;
644 if (args.tf_flags & IDE_TFLAG_LBA48)
645 args.tf_flags |= IDE_TFLAG_OUT_HOB;
646 }
647
648 if (req_task->in_flags.b.data)
649 args.tf_flags |= IDE_TFLAG_IN_DATA;
650
651 switch(req_task->data_phase) {
652 case TASKFILE_MULTI_OUT:
653 if (!drive->mult_count) {
654 /* (hs): give up if multcount is not set */
655 printk(KERN_ERR "%s: %s Multimode Write " \
656 "multcount is not set\n",
657 drive->name, __FUNCTION__);
658 err = -EPERM;
659 goto abort;
660 }
661 /* fall through */
662 case TASKFILE_OUT:
663 /* fall through */
664 case TASKFILE_OUT_DMAQ:
665 case TASKFILE_OUT_DMA:
666 nsect = taskout / SECTOR_SIZE;
667 data_buf = outbuf;
668 break;
669 case TASKFILE_MULTI_IN:
670 if (!drive->mult_count) {
671 /* (hs): give up if multcount is not set */
672 printk(KERN_ERR "%s: %s Multimode Read failure " \
673 "multcount is not set\n",
674 drive->name, __FUNCTION__);
675 err = -EPERM;
676 goto abort;
677 }
678 /* fall through */
679 case TASKFILE_IN:
680 /* fall through */
681 case TASKFILE_IN_DMAQ:
682 case TASKFILE_IN_DMA:
683 nsect = taskin / SECTOR_SIZE;
684 data_buf = inbuf;
685 break;
686 case TASKFILE_NO_DATA:
687 break;
688 default:
689 err = -EFAULT;
690 goto abort;
691 }
692
693 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
694 nsect = 0;
695 else if (!nsect) {
696 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
697
698 if (!nsect) {
699 printk(KERN_ERR "%s: in/out command without data\n",
700 drive->name);
701 err = -EFAULT;
702 goto abort;
703 }
704 }
705
706 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
707 args.tf_flags |= IDE_TFLAG_WRITE;
708
709 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
710
711 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
712 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
713
714 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
715 req_task->in_flags.all == 0) {
716 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
717 if (drive->addressing == 1)
718 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
719 }
720
721 if (copy_to_user(buf, req_task, tasksize)) {
722 err = -EFAULT;
723 goto abort;
724 }
725 if (taskout) {
726 int outtotal = tasksize;
727 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
728 err = -EFAULT;
729 goto abort;
730 }
731 }
732 if (taskin) {
733 int intotal = tasksize + taskout;
734 if (copy_to_user(buf + intotal, inbuf, taskin)) {
735 err = -EFAULT;
736 goto abort;
737 }
738 }
739 abort:
740 kfree(req_task);
741 kfree(outbuf);
742 kfree(inbuf);
743
744 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
745
746 return err;
747 }
748 #endif
749
750 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
751 {
752 u8 *buf = NULL;
753 int bufsize = 0, err = 0;
754 u8 args[4], xfer_rate = 0;
755 ide_task_t tfargs;
756 struct ide_taskfile *tf = &tfargs.tf;
757 struct hd_driveid *id = drive->id;
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 (tf->command == WIN_SETFEATURES &&
796 tf->feature == SETFEATURES_XFER &&
797 tf->nsect >= XFER_SW_DMA_0 &&
798 (id->dma_ultra || id->dma_mword || id->dma_1word)) {
799 xfer_rate = args[1];
800 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
801 printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
802 "be set\n", drive->name);
803 goto abort;
804 }
805 }
806
807 err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
808
809 args[0] = tf->status;
810 args[1] = tf->error;
811 args[2] = tf->nsect;
812
813 if (!err && xfer_rate) {
814 /* active-retuning-calls future */
815 ide_set_xfer_rate(drive, xfer_rate);
816 ide_driveid_update(drive);
817 }
818 abort:
819 if (copy_to_user((void __user *)arg, &args, 4))
820 err = -EFAULT;
821 if (buf) {
822 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
823 err = -EFAULT;
824 kfree(buf);
825 }
826 return err;
827 }
828
829 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
830 {
831 void __user *p = (void __user *)arg;
832 int err = 0;
833 u8 args[7];
834 ide_task_t task;
835
836 if (copy_from_user(args, p, 7))
837 return -EFAULT;
838
839 memset(&task, 0, sizeof(task));
840 memcpy(&task.tf_array[7], &args[1], 6);
841 task.tf.command = args[0];
842 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
843
844 err = ide_no_data_taskfile(drive, &task);
845
846 args[0] = task.tf.command;
847 memcpy(&args[1], &task.tf_array[7], 6);
848
849 if (copy_to_user(p, args, 7))
850 err = -EFAULT;
851
852 return err;
853 }
WRT350N Kernel Patches