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Merge branch 'slab-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm
[deliverable/linux.git] / drivers / ide / ide-taskfile.c
CommitLineData
1da177e4 1/*
59bca8cc
BZ		 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
1da177e4 5 * IBM Storage Technology Division
59bca8cc 6 * Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz
1da177e4
LT		 7 *
8 * The big the bad and the ugly.
1da177e4
LT		 9 */
10
1da177e4
LT		 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>
651c29a1 17#include <linux/sched.h>
1da177e4
LT		 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>
55c16a70 29#include <linux/scatterlist.h>
1da177e4
LT		 30
31#include <asm/byteorder.h>
32#include <asm/irq.h>
33#include <asm/uaccess.h>
34#include <asm/io.h>
35
9e42237f
BZ		 36void 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
74095a91
BZ		 42 if (task->tf_flags & IDE_TFLAG_FLAGGED)
43 HIHI = 0xFF;
44
807e35d6
BZ		 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);
6dd9b837
BZ		 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);
807e35d6
BZ		 54#endif
55
81ca6919 56 ide_set_irq(drive, 1);
9e42237f
BZ		 57
58 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
59 SELECT_MASK(drive, 0);
60
74095a91
BZ		 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)
9e42237f 65 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
74095a91 66 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
9e42237f 67 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
74095a91 68 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
9e42237f 69 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
74095a91 70 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
9e42237f 71 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
74095a91 72 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
9e42237f 73 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
9e42237f 74
74095a91
BZ		 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);
9e42237f 85
807e35d6
BZ		 86 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
87 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
9e42237f
BZ		 88}
89
1da177e4
LT		 90int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
91{
92 ide_task_t args;
650d841d 93
1da177e4 94 memset(&args, 0, sizeof(ide_task_t));
650d841d 95 args.tf.nsect = 0x01;
1da177e4 96 if (drive->media == ide_disk)
650d841d 97 args.tf.command = WIN_IDENTIFY;
1da177e4 98 else
650d841d 99 args.tf.command = WIN_PIDENTIFY;
657cc1a8 100 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
ac026ff2 101 args.data_phase = TASKFILE_IN;
ac026ff2 102 return ide_raw_taskfile(drive, &args, buf, 1);
1da177e4
LT		 103}
104
74095a91
BZ		 105static int inline task_dma_ok(ide_task_t *task)
106{
f6e29e35 107 if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
74095a91
BZ		 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
1192e528 124static ide_startstop_t task_no_data_intr(ide_drive_t *);
57d7366b
BZ		 125static ide_startstop_t set_geometry_intr(ide_drive_t *);
126static ide_startstop_t recal_intr(ide_drive_t *);
127static ide_startstop_t set_multmode_intr(ide_drive_t *);
f6e29e35
BZ		 128static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
129static ide_startstop_t task_in_intr(ide_drive_t *);
1192e528 130
1da177e4
LT		 131ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
132{
133 ide_hwif_t *hwif = HWIF(drive);
650d841d 134 struct ide_taskfile *tf = &task->tf;
57d7366b 135 ide_handler_t *handler = NULL;
1da177e4 136
1edee60e
BZ		 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
f6e29e35
BZ		 149 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
150 ide_tf_load(drive, task);
1da177e4 151
10d90157
BZ		 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:
57d7366b 160 handler = task_in_intr;
1192e528 161 /* fall-through */
10d90157 162 case TASKFILE_NO_DATA:
57d7366b
BZ		 163 if (handler == NULL)
164 handler = task_no_data_intr;
1192e528 165 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
57d7366b
BZ		 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);
1da177e4 175 return ide_started;
10d90157
BZ		 176 default:
177 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
178 hwif->dma_setup(drive))
179 return ide_stopped;
74095a91
BZ		 180 hwif->dma_exec_cmd(drive, tf->command);
181 hwif->dma_start(drive);
182 return ide_started;
1da177e4 183 }
1da177e4 184}
f6e29e35 185EXPORT_SYMBOL_GPL(do_rw_taskfile);
1da177e4 186
1da177e4
LT		 187/*
188 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
189 */
57d7366b 190static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
1da177e4 191{
c47137a9 192 u8 stat = ide_read_status(drive);
1da177e4 193
c47137a9 194 if (OK_STAT(stat, READY_STAT, BAD_STAT))
1da177e4 195 drive->mult_count = drive->mult_req;
c47137a9 196 else {
1da177e4
LT		 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 */
57d7366b 207static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
1da177e4 208{
1da177e4
LT		 209 int retries = 5;
210 u8 stat;
211
c47137a9 212 while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
1da177e4
LT		 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
125e1874 221 BUG_ON(HWGROUP(drive)->handler != NULL);
1da177e4
LT		 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 */
57d7366b 229static ide_startstop_t recal_intr(ide_drive_t *drive)
1da177e4 230{
c47137a9 231 u8 stat = ide_read_status(drive);
1da177e4 232
c47137a9 233 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
1da177e4
LT		 234 return ide_error(drive, "recal_intr", stat);
235 return ide_stopped;
236}
237
238/*
239 * Handler for commands without a data phase
240 */
1192e528 241static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
1da177e4
LT		 242{
243 ide_task_t *args = HWGROUP(drive)->rq->special;
1da177e4
LT		 244 u8 stat;
245
366c7f55 246 local_irq_enable_in_hardirq();
c47137a9
BZ		 247 stat = ide_read_status(drive);
248
249 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
1da177e4
LT		 250 return ide_error(drive, "task_no_data_intr", stat);
251 /* calls ide_end_drive_cmd */
c47137a9 252
1da177e4 253 if (args)
64a57fe4 254 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
1da177e4
LT		 255
256 return ide_stopped;
257}
258
da6f4c7f 259static u8 wait_drive_not_busy(ide_drive_t *drive)
1da177e4 260{
b42fa133 261 int retries;
1da177e4
LT		 262 u8 stat;
263
264 /*
265 * Last sector was transfered, wait until drive is ready.
2624565c 266 * This can take up to 10 usec, but we will wait max 1 ms.
1da177e4 267 */
b42fa133 268 for (retries = 0; retries < 100; retries++) {
c47137a9
BZ		 269 stat = ide_read_status(drive);
270
271 if (stat & BUSY_STAT)
b42fa133
MY		 272 udelay(10);
273 else
274 break;
275 }
1da177e4 276
b42fa133 277 if (stat & BUSY_STAT)
1da177e4
LT		 278 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
279
280 return stat;
281}
282
283static 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;
55c16a70 287 struct scatterlist *cursg = hwif->cursg;
1da177e4
LT		 288 struct page *page;
289#ifdef CONFIG_HIGHMEM
290 unsigned long flags;
291#endif
292 unsigned int offset;
293 u8 *buf;
294
55c16a70
JA		 295 cursg = hwif->cursg;
296 if (!cursg) {
297 cursg = sg;
298 hwif->cursg = sg;
299 }
300
45711f1a 301 page = sg_page(cursg);
55c16a70 302 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
1da177e4
LT		 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
55c16a70
JA		 316 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
317 hwif->cursg = sg_next(hwif->cursg);
1da177e4
LT		 318 hwif->cursg_ofs = 0;
319 }
320
321 /* do the actual data transfer */
322 if (write)
9e47be0c 323 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
1da177e4 324 else
9e47be0c 325 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
1da177e4
LT		 326
327 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
328#ifdef CONFIG_HIGHMEM
329 local_irq_restore(flags);
330#endif
331}
332
333static 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
858119e1 342static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
1da177e4
LT		 343 unsigned int write)
344{
35cf2b94
TH		 345 u8 saved_io_32bit = drive->io_32bit;
346
1da177e4
LT		 347 if (rq->bio) /* fs request */
348 rq->errors = 0;
349
35cf2b94
TH		 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
651c29a1
AM		 357 touch_softlockup_watchdog();
358
1da177e4
LT		 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 }
35cf2b94
TH		 368
369 drive->io_32bit = saved_io_32bit;
1da177e4
LT		 370}
371
372static 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
4d7a984b 407void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
1da177e4 408{
4aff5e23 409 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
64a57fe4 410 u8 err = ide_read_error(drive);
1da177e4 411
4d7a984b
TH		 412 ide_end_drive_cmd(drive, stat, err);
413 return;
1da177e4
LT		 414 }
415
03731fbd
RP		 416 if (rq->rq_disk) {
417 ide_driver_t *drv;
418
419 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
79f21b84 420 drv->end_request(drive, 1, rq->nr_sectors);
03731fbd 421 } else
79f21b84 422 ide_end_request(drive, 1, rq->nr_sectors);
1da177e4
LT		 423}
424
425/*
426 * Handler for command with PIO data-in phase (Read/Read Multiple).
427 */
f6e29e35 428static ide_startstop_t task_in_intr(ide_drive_t *drive)
1da177e4
LT		 429{
430 ide_hwif_t *hwif = drive->hwif;
431 struct request *rq = HWGROUP(drive)->rq;
c47137a9 432 u8 stat = ide_read_status(drive);
1da177e4
LT		 433
434 /* new way for dealing with premature shared PCI interrupts */
4906f3b4 435 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
1da177e4
LT		 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);
73d7de0c 448 if (!OK_STAT(stat, 0, BAD_STAT))
1da177e4
LT		 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}
1da177e4
LT		 459
460/*
461 * Handler for command with PIO data-out phase (Write/Write Multiple).
462 */
463static 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;
c47137a9 467 u8 stat = ide_read_status(drive);
1da177e4
LT		 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
f6e29e35 488static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
1da177e4
LT		 489{
490 ide_startstop_t startstop;
491
4906f3b4 492 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
1da177e4
LT		 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}
1da177e4 509
ac026ff2 510int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
1da177e4
LT		 511{
512 struct request rq;
513
514 memset(&rq, 0, sizeof(rq));
02ac2460 515 rq.ref_count = 1;
4aff5e23 516 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
1da177e4
LT		 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 */
ac026ff2
BZ		 525 rq.hard_nr_sectors = rq.nr_sectors = nsect;
526 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
1da177e4 527
ac026ff2
BZ		 528 if (task->tf_flags & IDE_TFLAG_WRITE)
529 rq.cmd_flags |= REQ_RW;
1da177e4 530
ac026ff2
BZ		 531 rq.special = task;
532 task->rq = &rq;
1da177e4 533
1da177e4
LT		 534 return ide_do_drive_cmd(drive, &rq, ide_wait);
535}
536
1da177e4
LT		 537EXPORT_SYMBOL(ide_raw_taskfile);
538
9a3c49be
BZ		 539int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
540{
ac026ff2 541 task->data_phase = TASKFILE_NO_DATA;
9a3c49be 542
ac026ff2 543 return ide_raw_taskfile(drive, task, NULL, 0);
9a3c49be
BZ		 544}
545EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
546
26a5b040 547#ifdef CONFIG_IDE_TASK_IOCTL
1da177e4
LT		 548int 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;
ac026ff2 554 u8 *data_buf = NULL;
1da177e4
LT		 555 int err = 0;
556 int tasksize = sizeof(struct ide_task_request_s);
3a42bb22
AC		 557 unsigned int taskin = 0;
558 unsigned int taskout = 0;
ac026ff2 559 u16 nsect = 0;
1da177e4
LT		 560 char __user *buf = (char __user *)arg;
561
562// printk("IDE Taskfile ...\n");
563
f5e3c2fa 564 req_task = kzalloc(tasksize, GFP_KERNEL);
1da177e4 565 if (req_task == NULL) return -ENOMEM;
1da177e4
LT		 566 if (copy_from_user(req_task, buf, tasksize)) {
567 kfree(req_task);
568 return -EFAULT;
569 }
570
3a42bb22
AC		 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 }
1da177e4
LT		 578
579 if (taskout) {
580 int outtotal = tasksize;
f5e3c2fa 581 outbuf = kzalloc(taskout, GFP_KERNEL);
1da177e4
LT		 582 if (outbuf == NULL) {
583 err = -ENOMEM;
584 goto abort;
585 }
1da177e4
LT		 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;
f5e3c2fa 594 inbuf = kzalloc(taskin, GFP_KERNEL);
1da177e4
LT		 595 if (inbuf == NULL) {
596 err = -ENOMEM;
597 goto abort;
598 }
1da177e4
LT		 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));
1da177e4 606
650d841d
BZ		 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);
866e2ec9
BZ		 609
610 args.data_phase = req_task->data_phase;
1da177e4 611
657cc1a8
BZ		 612 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
613 IDE_TFLAG_IN_TF;
a3bbb9d8 614 if (drive->addressing == 1)
657cc1a8 615 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
a3bbb9d8 616
74095a91
BZ		 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;
a3bbb9d8
BZ		 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;
74095a91
BZ		 646 }
647
866e2ec9
BZ		 648 if (req_task->in_flags.b.data)
649 args.tf_flags |= IDE_TFLAG_IN_DATA;
650
1da177e4 651 switch(req_task->data_phase) {
1da177e4
LT		 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:
ac026ff2
BZ		 663 /* fall through */
664 case TASKFILE_OUT_DMAQ:
665 case TASKFILE_OUT_DMA:
666 nsect = taskout / SECTOR_SIZE;
667 data_buf = outbuf;
1da177e4
LT		 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:
ac026ff2
BZ		 680 /* fall through */
681 case TASKFILE_IN_DMAQ:
682 case TASKFILE_IN_DMA:
683 nsect = taskin / SECTOR_SIZE;
684 data_buf = inbuf;
1da177e4
LT		 685 break;
686 case TASKFILE_NO_DATA:
1da177e4
LT		 687 break;
688 default:
689 err = -EFAULT;
690 goto abort;
691 }
692
ac026ff2
BZ		 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
650d841d
BZ		 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);
866e2ec9
BZ		 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 }
1da177e4
LT		 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 }
739abort:
740 kfree(req_task);
6044ec88
JJ		 741 kfree(outbuf);
742 kfree(inbuf);
1da177e4
LT		 743
744// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
745
1da177e4
LT		 746 return err;
747}
26a5b040 748#endif
1da177e4 749
1da177e4
LT		 750int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
751{
5a9e77af
BZ		 752 u8 *buf = NULL;
753 int bufsize = 0, err = 0;
754 u8 args[4], xfer_rate = 0;
1da177e4 755 ide_task_t tfargs;
650d841d 756 struct ide_taskfile *tf = &tfargs.tf;
5efe7c54 757 struct hd_driveid *id = drive->id;
1da177e4
LT		 758
759 if (NULL == (void *) arg) {
760 struct request rq;
145b75e9 761
1da177e4 762 ide_init_drive_cmd(&rq);
852738f3 763 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
145b75e9 764
1da177e4
LT		 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));
650d841d 772 tf->feature = args[2];
5a9e77af
BZ		 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 }
650d841d 784 tf->command = args[0];
5a9e77af 785 tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
1da177e4
LT		 786
787 if (args[3]) {
5a9e77af
BZ		 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)
1da177e4 792 return -ENOMEM;
1da177e4 793 }
5a9e77af 794
5efe7c54
BZ		 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)) {
1da177e4 799 xfer_rate = args[1];
af10f773
BZ		 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);
1da177e4 803 goto abort;
af10f773 804 }
1da177e4
LT		 805 }
806
5a9e77af
BZ		 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;
1da177e4
LT		 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 }
818abort:
5a9e77af 819 if (copy_to_user((void __user *)arg, &args, 4))
1da177e4 820 err = -EFAULT;
5a9e77af
BZ		 821 if (buf) {
822 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
823 err = -EFAULT;
824 kfree(buf);
825 }
1da177e4
LT		 826 return err;
827}
828
1da177e4
LT		 829int 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;
14b89ef9
BZ		 833 u8 args[7];
834 ide_task_t task;
1da177e4
LT		 835
836 if (copy_from_user(args, p, 7))
837 return -EFAULT;
14b89ef9
BZ		 838
839 memset(&task, 0, sizeof(task));
840 memcpy(&task.tf_array[7], &args[1], 6);
841 task.tf.command = args[0];
657cc1a8 842 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
14b89ef9
BZ		 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))
1da177e4 850 err = -EFAULT;
14b89ef9 851
1da177e4
LT		 852 return err;
853}
Linux kernel - Deliverables
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