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ide: add ide_no_data_taskfile() helper
[deliverable/linux.git] / drivers / ide / ide-taskfile.c
CommitLineData
1da177e4
LT		 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.
1da177e4
LT		 11 */
12
1da177e4
LT		 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>
651c29a1 19#include <linux/sched.h>
1da177e4
LT		 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>
55c16a70 31#include <linux/scatterlist.h>
1da177e4
LT		 32
33#include <asm/byteorder.h>
34#include <asm/irq.h>
35#include <asm/uaccess.h>
36#include <asm/io.h>
37
1da177e4
LT		 38static void ata_bswap_data (void *buffer, int wcount)
39{
40 u16 *p = buffer;
41
42 while (wcount--) {
43 *p = *p << 8 | *p >> 8; p++;
44 *p = *p << 8 | *p >> 8; p++;
45 }
46}
47
48static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
49{
50 HWIF(drive)->ata_input_data(drive, buffer, wcount);
51 if (drive->bswap)
52 ata_bswap_data(buffer, wcount);
53}
54
55static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
56{
57 if (drive->bswap) {
58 ata_bswap_data(buffer, wcount);
59 HWIF(drive)->ata_output_data(drive, buffer, wcount);
60 ata_bswap_data(buffer, wcount);
61 } else {
62 HWIF(drive)->ata_output_data(drive, buffer, wcount);
63 }
64}
65
9e42237f
BZ		 66void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
67{
68 ide_hwif_t *hwif = drive->hwif;
69 struct ide_taskfile *tf = &task->tf;
70 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
71
72 if (IDE_CONTROL_REG)
73 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
74
75 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
76 SELECT_MASK(drive, 0);
77
78 if (task->tf_flags & IDE_TFLAG_LBA48) {
79 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
80 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
81 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
82 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
83 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
84 }
85
86 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
87 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
88 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
89 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
90 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
91
92 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
93}
94
95EXPORT_SYMBOL_GPL(ide_tf_load);
96
1da177e4
LT		 97int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
98{
99 ide_task_t args;
650d841d 100
1da177e4 101 memset(&args, 0, sizeof(ide_task_t));
650d841d 102 args.tf.nsect = 0x01;
1da177e4 103 if (drive->media == ide_disk)
650d841d 104 args.tf.command = WIN_IDENTIFY;
1da177e4 105 else
650d841d 106 args.tf.command = WIN_PIDENTIFY;
1da177e4
LT		 107 args.command_type = IDE_DRIVE_TASK_IN;
108 args.data_phase = TASKFILE_IN;
109 args.handler = &task_in_intr;
110 return ide_raw_taskfile(drive, &args, buf);
111}
112
113ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
114{
115 ide_hwif_t *hwif = HWIF(drive);
650d841d 116 struct ide_taskfile *tf = &task->tf;
1da177e4 117
9e42237f
BZ		 118 if (drive->addressing == 1)
119 task->tf_flags |= IDE_TFLAG_LBA48;
1da177e4 120
9e42237f 121 ide_tf_load(drive, task);
1da177e4
LT		 122
123 if (task->handler != NULL) {
124 if (task->prehandler != NULL) {
650d841d 125 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
1da177e4
LT		 126 ndelay(400); /* FIXME */
127 return task->prehandler(drive, task->rq);
128 }
650d841d 129 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
1da177e4
LT		 130 return ide_started;
131 }
132
133 if (!drive->using_dma)
134 return ide_stopped;
135
650d841d 136 switch (tf->command) {
1da177e4
LT		 137 case WIN_WRITEDMA_ONCE:
138 case WIN_WRITEDMA:
139 case WIN_WRITEDMA_EXT:
140 case WIN_READDMA_ONCE:
141 case WIN_READDMA:
142 case WIN_READDMA_EXT:
143 case WIN_IDENTIFY_DMA:
144 if (!hwif->dma_setup(drive)) {
650d841d 145 hwif->dma_exec_cmd(drive, tf->command);
1da177e4
LT		 146 hwif->dma_start(drive);
147 return ide_started;
148 }
149 break;
150 default:
151 if (task->handler == NULL)
152 return ide_stopped;
153 }
154
155 return ide_stopped;
156}
157
1da177e4
LT		 158/*
159 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
160 */
161ide_startstop_t set_multmode_intr (ide_drive_t *drive)
162{
163 ide_hwif_t *hwif = HWIF(drive);
164 u8 stat;
165
166 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
167 drive->mult_count = drive->mult_req;
168 } else {
169 drive->mult_req = drive->mult_count = 0;
170 drive->special.b.recalibrate = 1;
171 (void) ide_dump_status(drive, "set_multmode", stat);
172 }
173 return ide_stopped;
174}
175
176/*
177 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
178 */
179ide_startstop_t set_geometry_intr (ide_drive_t *drive)
180{
181 ide_hwif_t *hwif = HWIF(drive);
182 int retries = 5;
183 u8 stat;
184
185 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
186 udelay(10);
187
188 if (OK_STAT(stat, READY_STAT, BAD_STAT))
189 return ide_stopped;
190
191 if (stat & (ERR_STAT|DRQ_STAT))
192 return ide_error(drive, "set_geometry_intr", stat);
193
125e1874 194 BUG_ON(HWGROUP(drive)->handler != NULL);
1da177e4
LT		 195 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
196 return ide_started;
197}
198
199/*
200 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
201 */
202ide_startstop_t recal_intr (ide_drive_t *drive)
203{
204 ide_hwif_t *hwif = HWIF(drive);
205 u8 stat;
206
207 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
208 return ide_error(drive, "recal_intr", stat);
209 return ide_stopped;
210}
211
212/*
213 * Handler for commands without a data phase
214 */
215ide_startstop_t task_no_data_intr (ide_drive_t *drive)
216{
217 ide_task_t *args = HWGROUP(drive)->rq->special;
218 ide_hwif_t *hwif = HWIF(drive);
219 u8 stat;
220
366c7f55 221 local_irq_enable_in_hardirq();
1da177e4
LT		 222 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
223 return ide_error(drive, "task_no_data_intr", stat);
224 /* calls ide_end_drive_cmd */
225 }
226 if (args)
227 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
228
229 return ide_stopped;
230}
231
1da177e4
LT		 232static u8 wait_drive_not_busy(ide_drive_t *drive)
233{
234 ide_hwif_t *hwif = HWIF(drive);
b42fa133 235 int retries;
1da177e4
LT		 236 u8 stat;
237
238 /*
239 * Last sector was transfered, wait until drive is ready.
240 * This can take up to 10 usec, but we will wait max 1 ms
241 * (drive_cmd_intr() waits that long).
242 */
b42fa133
MY		 243 for (retries = 0; retries < 100; retries++) {
244 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
245 udelay(10);
246 else
247 break;
248 }
1da177e4 249
b42fa133 250 if (stat & BUSY_STAT)
1da177e4
LT		 251 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
252
253 return stat;
254}
255
256static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
257{
258 ide_hwif_t *hwif = drive->hwif;
259 struct scatterlist *sg = hwif->sg_table;
55c16a70 260 struct scatterlist *cursg = hwif->cursg;
1da177e4
LT		 261 struct page *page;
262#ifdef CONFIG_HIGHMEM
263 unsigned long flags;
264#endif
265 unsigned int offset;
266 u8 *buf;
267
55c16a70
JA		 268 cursg = hwif->cursg;
269 if (!cursg) {
270 cursg = sg;
271 hwif->cursg = sg;
272 }
273
45711f1a 274 page = sg_page(cursg);
55c16a70 275 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
1da177e4
LT		 276
277 /* get the current page and offset */
278 page = nth_page(page, (offset >> PAGE_SHIFT));
279 offset %= PAGE_SIZE;
280
281#ifdef CONFIG_HIGHMEM
282 local_irq_save(flags);
283#endif
284 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
285
286 hwif->nleft--;
287 hwif->cursg_ofs++;
288
55c16a70
JA		 289 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
290 hwif->cursg = sg_next(hwif->cursg);
1da177e4
LT		 291 hwif->cursg_ofs = 0;
292 }
293
294 /* do the actual data transfer */
295 if (write)
296 taskfile_output_data(drive, buf, SECTOR_WORDS);
297 else
298 taskfile_input_data(drive, buf, SECTOR_WORDS);
299
300 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
301#ifdef CONFIG_HIGHMEM
302 local_irq_restore(flags);
303#endif
304}
305
306static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
307{
308 unsigned int nsect;
309
310 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
311 while (nsect--)
312 ide_pio_sector(drive, write);
313}
314
858119e1 315static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
1da177e4
LT		 316 unsigned int write)
317{
318 if (rq->bio) /* fs request */
319 rq->errors = 0;
320
651c29a1
AM		 321 touch_softlockup_watchdog();
322
1da177e4
LT		 323 switch (drive->hwif->data_phase) {
324 case TASKFILE_MULTI_IN:
325 case TASKFILE_MULTI_OUT:
326 ide_pio_multi(drive, write);
327 break;
328 default:
329 ide_pio_sector(drive, write);
330 break;
331 }
332}
333
334static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
335 const char *s, u8 stat)
336{
337 if (rq->bio) {
338 ide_hwif_t *hwif = drive->hwif;
339 int sectors = hwif->nsect - hwif->nleft;
340
341 switch (hwif->data_phase) {
342 case TASKFILE_IN:
343 if (hwif->nleft)
344 break;
345 /* fall through */
346 case TASKFILE_OUT:
347 sectors--;
348 break;
349 case TASKFILE_MULTI_IN:
350 if (hwif->nleft)
351 break;
352 /* fall through */
353 case TASKFILE_MULTI_OUT:
354 sectors -= drive->mult_count;
355 default:
356 break;
357 }
358
359 if (sectors > 0) {
360 ide_driver_t *drv;
361
362 drv = *(ide_driver_t **)rq->rq_disk->private_data;
363 drv->end_request(drive, 1, sectors);
364 }
365 }
366 return ide_error(drive, s, stat);
367}
368
369static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
370{
55c16a70
JA		 371 HWIF(drive)->cursg = NULL;
372
4aff5e23 373 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
1da177e4
LT		 374 ide_task_t *task = rq->special;
375
376 if (task->tf_out_flags.all) {
377 u8 err = drive->hwif->INB(IDE_ERROR_REG);
378 ide_end_drive_cmd(drive, stat, err);
379 return;
380 }
381 }
382
03731fbd
RP		 383 if (rq->rq_disk) {
384 ide_driver_t *drv;
385
386 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
387 drv->end_request(drive, 1, rq->hard_nr_sectors);
388 } else
389 ide_end_request(drive, 1, rq->hard_nr_sectors);
1da177e4
LT		 390}
391
392/*
393 * Handler for command with PIO data-in phase (Read/Read Multiple).
394 */
395ide_startstop_t task_in_intr (ide_drive_t *drive)
396{
397 ide_hwif_t *hwif = drive->hwif;
398 struct request *rq = HWGROUP(drive)->rq;
399 u8 stat = hwif->INB(IDE_STATUS_REG);
400
401 /* new way for dealing with premature shared PCI interrupts */
402 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
403 if (stat & (ERR_STAT | DRQ_STAT))
404 return task_error(drive, rq, __FUNCTION__, stat);
405 /* No data yet, so wait for another IRQ. */
406 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
407 return ide_started;
408 }
409
410 ide_pio_datablock(drive, rq, 0);
411
412 /* If it was the last datablock check status and finish transfer. */
413 if (!hwif->nleft) {
414 stat = wait_drive_not_busy(drive);
415 if (!OK_STAT(stat, 0, BAD_R_STAT))
416 return task_error(drive, rq, __FUNCTION__, stat);
417 task_end_request(drive, rq, stat);
418 return ide_stopped;
419 }
420
421 /* Still data left to transfer. */
422 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
423
424 return ide_started;
425}
426EXPORT_SYMBOL(task_in_intr);
427
428/*
429 * Handler for command with PIO data-out phase (Write/Write Multiple).
430 */
431static ide_startstop_t task_out_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 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
438 return task_error(drive, rq, __FUNCTION__, stat);
439
440 /* Deal with unexpected ATA data phase. */
441 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
442 return task_error(drive, rq, __FUNCTION__, stat);
443
444 if (!hwif->nleft) {
445 task_end_request(drive, rq, stat);
446 return ide_stopped;
447 }
448
449 /* Still data left to transfer. */
450 ide_pio_datablock(drive, rq, 1);
451 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
452
453 return ide_started;
454}
455
456ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
457{
458 ide_startstop_t startstop;
459
460 if (ide_wait_stat(&startstop, drive, DATA_READY,
461 drive->bad_wstat, WAIT_DRQ)) {
462 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
463 drive->name,
464 drive->hwif->data_phase ? "MULT" : "",
465 drive->addressing ? "_EXT" : "");
466 return startstop;
467 }
468
469 if (!drive->unmask)
470 local_irq_disable();
471
472 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
473 ide_pio_datablock(drive, rq, 1);
474
475 return ide_started;
476}
477EXPORT_SYMBOL(pre_task_out_intr);
478
479static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
480{
481 struct request rq;
482
483 memset(&rq, 0, sizeof(rq));
02ac2460 484 rq.ref_count = 1;
4aff5e23 485 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
1da177e4
LT		 486 rq.buffer = buf;
487
488 /*
489 * (ks) We transfer currently only whole sectors.
490 * This is suffient for now. But, it would be great,
491 * if we would find a solution to transfer any size.
492 * To support special commands like READ LONG.
493 */
494 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
495 if (data_size == 0)
650d841d 496 rq.nr_sectors = (args->tf.hob_nsect << 8) | args->tf.nsect;
1da177e4
LT		 497 else
498 rq.nr_sectors = data_size / SECTOR_SIZE;
499
500 if (!rq.nr_sectors) {
501 printk(KERN_ERR "%s: in/out command without data\n",
502 drive->name);
503 return -EFAULT;
504 }
505
506 rq.hard_nr_sectors = rq.nr_sectors;
507 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
508
509 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
4aff5e23 510 rq.cmd_flags |= REQ_RW;
1da177e4
LT		 511 }
512
513 rq.special = args;
ef0f6a43 514 args->rq = &rq;
1da177e4
LT		 515 return ide_do_drive_cmd(drive, &rq, ide_wait);
516}
517
518int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
519{
520 return ide_diag_taskfile(drive, args, 0, buf);
521}
522
523EXPORT_SYMBOL(ide_raw_taskfile);
524
9a3c49be
BZ		 525int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
526{
527 task->command_type = IDE_DRIVE_TASK_NO_DATA;
528 task->data_phase = TASKFILE_NO_DATA;
529 task->handler = task_no_data_intr;
530
531 return ide_raw_taskfile(drive, task, NULL);
532}
533EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
534
26a5b040 535#ifdef CONFIG_IDE_TASK_IOCTL
1da177e4
LT		 536int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
537{
538 ide_task_request_t *req_task;
539 ide_task_t args;
540 u8 *outbuf = NULL;
541 u8 *inbuf = NULL;
1da177e4
LT		 542 int err = 0;
543 int tasksize = sizeof(struct ide_task_request_s);
3a42bb22
AC		 544 unsigned int taskin = 0;
545 unsigned int taskout = 0;
1da177e4
LT		 546 u8 io_32bit = drive->io_32bit;
547 char __user *buf = (char __user *)arg;
548
549// printk("IDE Taskfile ...\n");
550
f5e3c2fa 551 req_task = kzalloc(tasksize, GFP_KERNEL);
1da177e4 552 if (req_task == NULL) return -ENOMEM;
1da177e4
LT		 553 if (copy_from_user(req_task, buf, tasksize)) {
554 kfree(req_task);
555 return -EFAULT;
556 }
557
3a42bb22
AC		 558 taskout = req_task->out_size;
559 taskin = req_task->in_size;
560
561 if (taskin > 65536 || taskout > 65536) {
562 err = -EINVAL;
563 goto abort;
564 }
1da177e4
LT		 565
566 if (taskout) {
567 int outtotal = tasksize;
f5e3c2fa 568 outbuf = kzalloc(taskout, GFP_KERNEL);
1da177e4
LT		 569 if (outbuf == NULL) {
570 err = -ENOMEM;
571 goto abort;
572 }
1da177e4
LT		 573 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
574 err = -EFAULT;
575 goto abort;
576 }
577 }
578
579 if (taskin) {
580 int intotal = tasksize + taskout;
f5e3c2fa 581 inbuf = kzalloc(taskin, GFP_KERNEL);
1da177e4
LT		 582 if (inbuf == NULL) {
583 err = -ENOMEM;
584 goto abort;
585 }
1da177e4
LT		 586 if (copy_from_user(inbuf, buf + intotal, taskin)) {
587 err = -EFAULT;
588 goto abort;
589 }
590 }
591
592 memset(&args, 0, sizeof(ide_task_t));
1da177e4 593
650d841d
BZ		 594 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
595 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
1da177e4
LT		 596 args.tf_in_flags = req_task->in_flags;
597 args.tf_out_flags = req_task->out_flags;
598 args.data_phase = req_task->data_phase;
599 args.command_type = req_task->req_cmd;
600
601 drive->io_32bit = 0;
602 switch(req_task->data_phase) {
603 case TASKFILE_OUT_DMAQ:
604 case TASKFILE_OUT_DMA:
605 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
606 break;
607 case TASKFILE_IN_DMAQ:
608 case TASKFILE_IN_DMA:
609 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
610 break;
611 case TASKFILE_MULTI_OUT:
612 if (!drive->mult_count) {
613 /* (hs): give up if multcount is not set */
614 printk(KERN_ERR "%s: %s Multimode Write " \
615 "multcount is not set\n",
616 drive->name, __FUNCTION__);
617 err = -EPERM;
618 goto abort;
619 }
620 /* fall through */
621 case TASKFILE_OUT:
622 args.prehandler = &pre_task_out_intr;
623 args.handler = &task_out_intr;
624 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
625 break;
626 case TASKFILE_MULTI_IN:
627 if (!drive->mult_count) {
628 /* (hs): give up if multcount is not set */
629 printk(KERN_ERR "%s: %s Multimode Read failure " \
630 "multcount is not set\n",
631 drive->name, __FUNCTION__);
632 err = -EPERM;
633 goto abort;
634 }
635 /* fall through */
636 case TASKFILE_IN:
637 args.handler = &task_in_intr;
638 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
639 break;
640 case TASKFILE_NO_DATA:
641 args.handler = &task_no_data_intr;
642 err = ide_diag_taskfile(drive, &args, 0, NULL);
643 break;
644 default:
645 err = -EFAULT;
646 goto abort;
647 }
648
650d841d
BZ		 649 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
650 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
1da177e4
LT		 651 req_task->in_flags = args.tf_in_flags;
652 req_task->out_flags = args.tf_out_flags;
653
654 if (copy_to_user(buf, req_task, tasksize)) {
655 err = -EFAULT;
656 goto abort;
657 }
658 if (taskout) {
659 int outtotal = tasksize;
660 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
661 err = -EFAULT;
662 goto abort;
663 }
664 }
665 if (taskin) {
666 int intotal = tasksize + taskout;
667 if (copy_to_user(buf + intotal, inbuf, taskin)) {
668 err = -EFAULT;
669 goto abort;
670 }
671 }
672abort:
673 kfree(req_task);
6044ec88
JJ		 674 kfree(outbuf);
675 kfree(inbuf);
1da177e4
LT		 676
677// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
678
679 drive->io_32bit = io_32bit;
680
681 return err;
682}
26a5b040 683#endif
1da177e4
LT		 684
685int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
686{
687 struct request rq;
688 u8 buffer[4];
689
690 if (!buf)
691 buf = buffer;
692 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
693 ide_init_drive_cmd(&rq);
694 rq.buffer = buf;
695 *buf++ = cmd;
696 *buf++ = nsect;
697 *buf++ = feature;
698 *buf++ = sectors;
699 return ide_do_drive_cmd(drive, &rq, ide_wait);
700}
701
1da177e4
LT		 702int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
703{
704 int err = 0;
705 u8 args[4], *argbuf = args;
706 u8 xfer_rate = 0;
707 int argsize = 4;
708 ide_task_t tfargs;
650d841d 709 struct ide_taskfile *tf = &tfargs.tf;
1da177e4
LT		 710
711 if (NULL == (void *) arg) {
712 struct request rq;
713 ide_init_drive_cmd(&rq);
714 return ide_do_drive_cmd(drive, &rq, ide_wait);
715 }
716
717 if (copy_from_user(args, (void __user *)arg, 4))
718 return -EFAULT;
719
720 memset(&tfargs, 0, sizeof(ide_task_t));
650d841d
BZ		 721 tf->feature = args[2];
722 tf->nsect = args[3];
723 tf->lbal = args[1];
724 tf->command = args[0];
1da177e4
LT		 725
726 if (args[3]) {
727 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
f5e3c2fa 728 argbuf = kzalloc(argsize, GFP_KERNEL);
1da177e4
LT		 729 if (argbuf == NULL)
730 return -ENOMEM;
1da177e4
LT		 731 }
732 if (set_transfer(drive, &tfargs)) {
733 xfer_rate = args[1];
734 if (ide_ata66_check(drive, &tfargs))
735 goto abort;
736 }
737
738 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
739
740 if (!err && xfer_rate) {
741 /* active-retuning-calls future */
742 ide_set_xfer_rate(drive, xfer_rate);
743 ide_driveid_update(drive);
744 }
745abort:
746 if (copy_to_user((void __user *)arg, argbuf, argsize))
747 err = -EFAULT;
748 if (argsize > 4)
749 kfree(argbuf);
750 return err;
751}
752
753static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
754{
755 struct request rq;
756
757 ide_init_drive_cmd(&rq);
4aff5e23 758 rq.cmd_type = REQ_TYPE_ATA_TASK;
1da177e4
LT		 759 rq.buffer = buf;
760 return ide_do_drive_cmd(drive, &rq, ide_wait);
761}
762
1da177e4
LT		 763int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
764{
765 void __user *p = (void __user *)arg;
766 int err = 0;
767 u8 args[7], *argbuf = args;
768 int argsize = 7;
769
770 if (copy_from_user(args, p, 7))
771 return -EFAULT;
772 err = ide_wait_cmd_task(drive, argbuf);
773 if (copy_to_user(p, argbuf, argsize))
774 err = -EFAULT;
775 return err;
776}
777
778/*
779 * NOTICE: This is additions from IBM to provide a discrete interface,
780 * for selective taskregister access operations. Nice JOB Klaus!!!
781 * Glad to be able to work and co-develop this with you and IBM.
782 */
783ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
784{
785 ide_hwif_t *hwif = HWIF(drive);
650d841d 786 struct ide_taskfile *tf = &task->tf;
1da177e4
LT		 787
788 if (task->data_phase == TASKFILE_MULTI_IN ||
789 task->data_phase == TASKFILE_MULTI_OUT) {
790 if (!drive->mult_count) {
791 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
792 return ide_stopped;
793 }
794 }
795
796 /*
e07bc709 797 * (ks) Check taskfile in flags.
1da177e4
LT		 798 * If set, then execute as it is defined.
799 * If not set, then define default settings.
800 * The default values are:
e07bc709
BZ		 801 * read all taskfile registers (except data)
802 * read the hob registers (sector, nsector, lcyl, hcyl)
1da177e4 803 */
1da177e4
LT		 804 if (task->tf_in_flags.all == 0) {
805 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
806 if (drive->addressing == 1)
807 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
808 }
809
810 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
811 if (IDE_CONTROL_REG)
812 /* clear nIEN */
813 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
814 SELECT_MASK(drive, 0);
815
650d841d
BZ		 816 if (task->tf_out_flags.b.data)
817 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
1da177e4
LT		 818
819 /* (ks) send hob registers first */
820 if (task->tf_out_flags.b.nsector_hob)
650d841d 821 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
1da177e4 822 if (task->tf_out_flags.b.sector_hob)
650d841d 823 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
1da177e4 824 if (task->tf_out_flags.b.lcyl_hob)
650d841d 825 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
1da177e4 826 if (task->tf_out_flags.b.hcyl_hob)
650d841d 827 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
1da177e4
LT		 828
829 /* (ks) Send now the standard registers */
830 if (task->tf_out_flags.b.error_feature)
650d841d 831 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
1da177e4
LT		 832 /* refers to number of sectors to transfer */
833 if (task->tf_out_flags.b.nsector)
650d841d 834 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
1da177e4
LT		 835 /* refers to sector offset or start sector */
836 if (task->tf_out_flags.b.sector)
650d841d 837 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
1da177e4 838 if (task->tf_out_flags.b.lcyl)
650d841d 839 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
1da177e4 840 if (task->tf_out_flags.b.hcyl)
650d841d 841 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
1da177e4
LT		 842
843 /*
844 * (ks) In the flagged taskfile approch, we will use all specified
845 * registers and the register value will not be changed, except the
846 * select bit (master/slave) in the drive_head register. We must make
847 * sure that the desired drive is selected.
848 */
650d841d 849 hwif->OUTB(tf->device | drive->select.all, IDE_SELECT_REG);
1da177e4
LT		 850 switch(task->data_phase) {
851
852 case TASKFILE_OUT_DMAQ:
853 case TASKFILE_OUT_DMA:
854 case TASKFILE_IN_DMAQ:
855 case TASKFILE_IN_DMA:
eda5b359
BZ		 856 if (!drive->using_dma)
857 break;
858
dd35b7bb 859 if (!hwif->dma_setup(drive)) {
650d841d 860 hwif->dma_exec_cmd(drive, tf->command);
dd35b7bb
BZ		 861 hwif->dma_start(drive);
862 return ide_started;
863 }
1da177e4
LT		 864 break;
865
866 default:
867 if (task->handler == NULL)
868 return ide_stopped;
869
870 /* Issue the command */
871 if (task->prehandler) {
650d841d 872 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
1da177e4
LT		 873 ndelay(400); /* FIXME */
874 return task->prehandler(drive, task->rq);
875 }
650d841d 876 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
dd35b7bb 877 return ide_started;
1da177e4
LT		 878 }
879
dd35b7bb 880 return ide_stopped;
1da177e4 881}
Linux kernel - Deliverables
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