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Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"
[pv_ops_mirror.git] / drivers / ide / ide-taskfile.c
blob30175c7688e877016e0bd666bcfa4b8ca5e92ad4
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 * Problems to be fixed because of BH interface or the lack therefore.
13 *
14 * Fill me in stupid !!!
15 *
16 * HOST:
17 * General refers to the Controller and Driver "pair".
18 * DATA HANDLER:
19 * Under the context of Linux it generally refers to an interrupt handler.
20 * However, it correctly describes the 'HOST'
21 * DATA BLOCK:
22 * The amount of data needed to be transfered as predefined in the
23 * setup of the device.
24 * STORAGE ATOMIC:
25 * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as
26 * small as a single sector or as large as the entire command block
27 * request.
28 */
29
30 #include <linux/module.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/kernel.h>
34 #include <linux/timer.h>
35 #include <linux/mm.h>
36 #include <linux/sched.h>
37 #include <linux/interrupt.h>
38 #include <linux/major.h>
39 #include <linux/errno.h>
40 #include <linux/genhd.h>
41 #include <linux/blkpg.h>
42 #include <linux/slab.h>
43 #include <linux/pci.h>
44 #include <linux/delay.h>
45 #include <linux/hdreg.h>
46 #include <linux/ide.h>
47 #include <linux/bitops.h>
48
49 #include <asm/byteorder.h>
50 #include <asm/irq.h>
51 #include <asm/uaccess.h>
52 #include <asm/io.h>
53
54 static void ata_bswap_data (void *buffer, int wcount)
55 {
56 u16 *p = buffer;
57
58 while (wcount--) {
59 *p = *p << 8 | *p >> 8; p++;
60 *p = *p << 8 | *p >> 8; p++;
61 }
62 }
63
64 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
65 {
66 HWIF(drive)->ata_input_data(drive, buffer, wcount);
67 if (drive->bswap)
68 ata_bswap_data(buffer, wcount);
69 }
70
71 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
72 {
73 if (drive->bswap) {
74 ata_bswap_data(buffer, wcount);
75 HWIF(drive)->ata_output_data(drive, buffer, wcount);
76 ata_bswap_data(buffer, wcount);
77 } else {
78 HWIF(drive)->ata_output_data(drive, buffer, wcount);
79 }
80 }
81
82 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
83 {
84 ide_task_t args;
85 memset(&args, 0, sizeof(ide_task_t));
86 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
87 if (drive->media == ide_disk)
88 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY;
89 else
90 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY;
91 args.command_type = IDE_DRIVE_TASK_IN;
92 args.data_phase = TASKFILE_IN;
93 args.handler = &task_in_intr;
94 return ide_raw_taskfile(drive, &args, buf);
95 }
96
97 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
98 {
99 ide_hwif_t *hwif = HWIF(drive);
100 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
101 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
102 u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
103
104 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
105 if (IDE_CONTROL_REG) {
106 /* clear nIEN */
107 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
108 }
109 SELECT_MASK(drive, 0);
110
111 if (drive->addressing == 1) {
112 hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
113 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
114 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
115 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
116 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
117 }
118
119 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
120 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
121 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
122 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
123 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
124
125 hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
126
127 if (task->handler != NULL) {
128 if (task->prehandler != NULL) {
129 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
130 ndelay(400); /* FIXME */
131 return task->prehandler(drive, task->rq);
132 }
133 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
134 return ide_started;
135 }
136
137 if (!drive->using_dma)
138 return ide_stopped;
139
140 switch (taskfile->command) {
141 case WIN_WRITEDMA_ONCE:
142 case WIN_WRITEDMA:
143 case WIN_WRITEDMA_EXT:
144 case WIN_READDMA_ONCE:
145 case WIN_READDMA:
146 case WIN_READDMA_EXT:
147 case WIN_IDENTIFY_DMA:
148 if (!hwif->dma_setup(drive)) {
149 hwif->dma_exec_cmd(drive, taskfile->command);
150 hwif->dma_start(drive);
151 return ide_started;
152 }
153 break;
154 default:
155 if (task->handler == NULL)
156 return ide_stopped;
157 }
158
159 return ide_stopped;
160 }
161
162 /*
163 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
164 */
165 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
166 {
167 ide_hwif_t *hwif = HWIF(drive);
168 u8 stat;
169
170 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
171 drive->mult_count = drive->mult_req;
172 } else {
173 drive->mult_req = drive->mult_count = 0;
174 drive->special.b.recalibrate = 1;
175 (void) ide_dump_status(drive, "set_multmode", stat);
176 }
177 return ide_stopped;
178 }
179
180 /*
181 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
182 */
183 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
184 {
185 ide_hwif_t *hwif = HWIF(drive);
186 int retries = 5;
187 u8 stat;
188
189 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
190 udelay(10);
191
192 if (OK_STAT(stat, READY_STAT, BAD_STAT))
193 return ide_stopped;
194
195 if (stat & (ERR_STAT|DRQ_STAT))
196 return ide_error(drive, "set_geometry_intr", stat);
197
198 BUG_ON(HWGROUP(drive)->handler != NULL);
199 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
200 return ide_started;
201 }
202
203 /*
204 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
205 */
206 ide_startstop_t recal_intr (ide_drive_t *drive)
207 {
208 ide_hwif_t *hwif = HWIF(drive);
209 u8 stat;
210
211 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
212 return ide_error(drive, "recal_intr", stat);
213 return ide_stopped;
214 }
215
216 /*
217 * Handler for commands without a data phase
218 */
219 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
220 {
221 ide_task_t *args = HWGROUP(drive)->rq->special;
222 ide_hwif_t *hwif = HWIF(drive);
223 u8 stat;
224
225 local_irq_enable_in_hardirq();
226 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
227 return ide_error(drive, "task_no_data_intr", stat);
228 /* calls ide_end_drive_cmd */
229 }
230 if (args)
231 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
232
233 return ide_stopped;
234 }
235
236 EXPORT_SYMBOL(task_no_data_intr);
237
238 static u8 wait_drive_not_busy(ide_drive_t *drive)
239 {
240 ide_hwif_t *hwif = HWIF(drive);
241 int retries = 100;
242 u8 stat;
243
244 /*
245 * Last sector was transfered, wait until drive is ready.
246 * This can take up to 10 usec, but we will wait max 1 ms
247 * (drive_cmd_intr() waits that long).
248 */
249 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
250 udelay(10);
251
252 if (!retries)
253 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
254
255 return stat;
256 }
257
258 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
259 {
260 ide_hwif_t *hwif = drive->hwif;
261 struct scatterlist *sg = hwif->sg_table;
262 struct page *page;
263 #ifdef CONFIG_HIGHMEM
264 unsigned long flags;
265 #endif
266 unsigned int offset;
267 u8 *buf;
268
269 page = sg[hwif->cursg].page;
270 offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
271
272 /* get the current page and offset */
273 page = nth_page(page, (offset >> PAGE_SHIFT));
274 offset %= PAGE_SIZE;
275
276 #ifdef CONFIG_HIGHMEM
277 local_irq_save(flags);
278 #endif
279 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
280
281 hwif->nleft--;
282 hwif->cursg_ofs++;
283
284 if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
285 hwif->cursg++;
286 hwif->cursg_ofs = 0;
287 }
288
289 /* do the actual data transfer */
290 if (write)
291 taskfile_output_data(drive, buf, SECTOR_WORDS);
292 else
293 taskfile_input_data(drive, buf, SECTOR_WORDS);
294
295 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
296 #ifdef CONFIG_HIGHMEM
297 local_irq_restore(flags);
298 #endif
299 }
300
301 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
302 {
303 unsigned int nsect;
304
305 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
306 while (nsect--)
307 ide_pio_sector(drive, write);
308 }
309
310 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
311 unsigned int write)
312 {
313 if (rq->bio) /* fs request */
314 rq->errors = 0;
315
316 touch_softlockup_watchdog();
317
318 switch (drive->hwif->data_phase) {
319 case TASKFILE_MULTI_IN:
320 case TASKFILE_MULTI_OUT:
321 ide_pio_multi(drive, write);
322 break;
323 default:
324 ide_pio_sector(drive, write);
325 break;
326 }
327 }
328
329 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
330 const char *s, u8 stat)
331 {
332 if (rq->bio) {
333 ide_hwif_t *hwif = drive->hwif;
334 int sectors = hwif->nsect - hwif->nleft;
335
336 switch (hwif->data_phase) {
337 case TASKFILE_IN:
338 if (hwif->nleft)
339 break;
340 /* fall through */
341 case TASKFILE_OUT:
342 sectors--;
343 break;
344 case TASKFILE_MULTI_IN:
345 if (hwif->nleft)
346 break;
347 /* fall through */
348 case TASKFILE_MULTI_OUT:
349 sectors -= drive->mult_count;
350 default:
351 break;
352 }
353
354 if (sectors > 0) {
355 ide_driver_t *drv;
356
357 drv = *(ide_driver_t **)rq->rq_disk->private_data;
358 drv->end_request(drive, 1, sectors);
359 }
360 }
361 return ide_error(drive, s, stat);
362 }
363
364 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
365 {
366 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
367 ide_task_t *task = rq->special;
368
369 if (task->tf_out_flags.all) {
370 u8 err = drive->hwif->INB(IDE_ERROR_REG);
371 ide_end_drive_cmd(drive, stat, err);
372 return;
373 }
374 }
375
376 if (rq->rq_disk) {
377 ide_driver_t *drv;
378
379 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
380 drv->end_request(drive, 1, rq->hard_nr_sectors);
381 } else
382 ide_end_request(drive, 1, rq->hard_nr_sectors);
383 }
384
385 /*
386 * Handler for command with PIO data-in phase (Read/Read Multiple).
387 */
388 ide_startstop_t task_in_intr (ide_drive_t *drive)
389 {
390 ide_hwif_t *hwif = drive->hwif;
391 struct request *rq = HWGROUP(drive)->rq;
392 u8 stat = hwif->INB(IDE_STATUS_REG);
393
394 /* new way for dealing with premature shared PCI interrupts */
395 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
396 if (stat & (ERR_STAT | DRQ_STAT))
397 return task_error(drive, rq, __FUNCTION__, stat);
398 /* No data yet, so wait for another IRQ. */
399 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
400 return ide_started;
401 }
402
403 ide_pio_datablock(drive, rq, 0);
404
405 /* If it was the last datablock check status and finish transfer. */
406 if (!hwif->nleft) {
407 stat = wait_drive_not_busy(drive);
408 if (!OK_STAT(stat, 0, BAD_R_STAT))
409 return task_error(drive, rq, __FUNCTION__, stat);
410 task_end_request(drive, rq, stat);
411 return ide_stopped;
412 }
413
414 /* Still data left to transfer. */
415 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
416
417 return ide_started;
418 }
419 EXPORT_SYMBOL(task_in_intr);
420
421 /*
422 * Handler for command with PIO data-out phase (Write/Write Multiple).
423 */
424 static ide_startstop_t task_out_intr (ide_drive_t *drive)
425 {
426 ide_hwif_t *hwif = drive->hwif;
427 struct request *rq = HWGROUP(drive)->rq;
428 u8 stat = hwif->INB(IDE_STATUS_REG);
429
430 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
431 return task_error(drive, rq, __FUNCTION__, stat);
432
433 /* Deal with unexpected ATA data phase. */
434 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
435 return task_error(drive, rq, __FUNCTION__, stat);
436
437 if (!hwif->nleft) {
438 task_end_request(drive, rq, stat);
439 return ide_stopped;
440 }
441
442 /* Still data left to transfer. */
443 ide_pio_datablock(drive, rq, 1);
444 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
445
446 return ide_started;
447 }
448
449 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
450 {
451 ide_startstop_t startstop;
452
453 if (ide_wait_stat(&startstop, drive, DATA_READY,
454 drive->bad_wstat, WAIT_DRQ)) {
455 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
456 drive->name,
457 drive->hwif->data_phase ? "MULT" : "",
458 drive->addressing ? "_EXT" : "");
459 return startstop;
460 }
461
462 if (!drive->unmask)
463 local_irq_disable();
464
465 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
466 ide_pio_datablock(drive, rq, 1);
467
468 return ide_started;
469 }
470 EXPORT_SYMBOL(pre_task_out_intr);
471
472 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
473 {
474 struct request rq;
475
476 memset(&rq, 0, sizeof(rq));
477 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
478 rq.buffer = buf;
479
480 /*
481 * (ks) We transfer currently only whole sectors.
482 * This is suffient for now. But, it would be great,
483 * if we would find a solution to transfer any size.
484 * To support special commands like READ LONG.
485 */
486 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
487 if (data_size == 0)
488 rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
489 else
490 rq.nr_sectors = data_size / SECTOR_SIZE;
491
492 if (!rq.nr_sectors) {
493 printk(KERN_ERR "%s: in/out command without data\n",
494 drive->name);
495 return -EFAULT;
496 }
497
498 rq.hard_nr_sectors = rq.nr_sectors;
499 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
500
501 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
502 rq.cmd_flags |= REQ_RW;
503 }
504
505 rq.special = args;
506 args->rq = &rq;
507 return ide_do_drive_cmd(drive, &rq, ide_wait);
508 }
509
510 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
511 {
512 return ide_diag_taskfile(drive, args, 0, buf);
513 }
514
515 EXPORT_SYMBOL(ide_raw_taskfile);
516
517 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
518 {
519 ide_task_request_t *req_task;
520 ide_task_t args;
521 u8 *outbuf = NULL;
522 u8 *inbuf = NULL;
523 task_ioreg_t *argsptr = args.tfRegister;
524 task_ioreg_t *hobsptr = args.hobRegister;
525 int err = 0;
526 int tasksize = sizeof(struct ide_task_request_s);
527 unsigned int taskin = 0;
528 unsigned int taskout = 0;
529 u8 io_32bit = drive->io_32bit;
530 char __user *buf = (char __user *)arg;
531
532 // printk("IDE Taskfile ...\n");
533
534 req_task = kzalloc(tasksize, GFP_KERNEL);
535 if (req_task == NULL) return -ENOMEM;
536 if (copy_from_user(req_task, buf, tasksize)) {
537 kfree(req_task);
538 return -EFAULT;
539 }
540
541 taskout = req_task->out_size;
542 taskin = req_task->in_size;
543
544 if (taskin > 65536 || taskout > 65536) {
545 err = -EINVAL;
546 goto abort;
547 }
548
549 if (taskout) {
550 int outtotal = tasksize;
551 outbuf = kzalloc(taskout, GFP_KERNEL);
552 if (outbuf == NULL) {
553 err = -ENOMEM;
554 goto abort;
555 }
556 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
557 err = -EFAULT;
558 goto abort;
559 }
560 }
561
562 if (taskin) {
563 int intotal = tasksize + taskout;
564 inbuf = kzalloc(taskin, GFP_KERNEL);
565 if (inbuf == NULL) {
566 err = -ENOMEM;
567 goto abort;
568 }
569 if (copy_from_user(inbuf, buf + intotal, taskin)) {
570 err = -EFAULT;
571 goto abort;
572 }
573 }
574
575 memset(&args, 0, sizeof(ide_task_t));
576 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
577 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
578
579 args.tf_in_flags = req_task->in_flags;
580 args.tf_out_flags = req_task->out_flags;
581 args.data_phase = req_task->data_phase;
582 args.command_type = req_task->req_cmd;
583
584 drive->io_32bit = 0;
585 switch(req_task->data_phase) {
586 case TASKFILE_OUT_DMAQ:
587 case TASKFILE_OUT_DMA:
588 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
589 break;
590 case TASKFILE_IN_DMAQ:
591 case TASKFILE_IN_DMA:
592 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
593 break;
594 case TASKFILE_MULTI_OUT:
595 if (!drive->mult_count) {
596 /* (hs): give up if multcount is not set */
597 printk(KERN_ERR "%s: %s Multimode Write " \
598 "multcount is not set\n",
599 drive->name, __FUNCTION__);
600 err = -EPERM;
601 goto abort;
602 }
603 /* fall through */
604 case TASKFILE_OUT:
605 args.prehandler = &pre_task_out_intr;
606 args.handler = &task_out_intr;
607 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
608 break;
609 case TASKFILE_MULTI_IN:
610 if (!drive->mult_count) {
611 /* (hs): give up if multcount is not set */
612 printk(KERN_ERR "%s: %s Multimode Read failure " \
613 "multcount is not set\n",
614 drive->name, __FUNCTION__);
615 err = -EPERM;
616 goto abort;
617 }
618 /* fall through */
619 case TASKFILE_IN:
620 args.handler = &task_in_intr;
621 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
622 break;
623 case TASKFILE_NO_DATA:
624 args.handler = &task_no_data_intr;
625 err = ide_diag_taskfile(drive, &args, 0, NULL);
626 break;
627 default:
628 err = -EFAULT;
629 goto abort;
630 }
631
632 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
633 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
634 req_task->in_flags = args.tf_in_flags;
635 req_task->out_flags = args.tf_out_flags;
636
637 if (copy_to_user(buf, req_task, tasksize)) {
638 err = -EFAULT;
639 goto abort;
640 }
641 if (taskout) {
642 int outtotal = tasksize;
643 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
644 err = -EFAULT;
645 goto abort;
646 }
647 }
648 if (taskin) {
649 int intotal = tasksize + taskout;
650 if (copy_to_user(buf + intotal, inbuf, taskin)) {
651 err = -EFAULT;
652 goto abort;
653 }
654 }
655 abort:
656 kfree(req_task);
657 kfree(outbuf);
658 kfree(inbuf);
659
660 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
661
662 drive->io_32bit = io_32bit;
663
664 return err;
665 }
666
667 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
668 {
669 struct request rq;
670 u8 buffer[4];
671
672 if (!buf)
673 buf = buffer;
674 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
675 ide_init_drive_cmd(&rq);
676 rq.buffer = buf;
677 *buf++ = cmd;
678 *buf++ = nsect;
679 *buf++ = feature;
680 *buf++ = sectors;
681 return ide_do_drive_cmd(drive, &rq, ide_wait);
682 }
683
684 /*
685 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
686 */
687 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
688 {
689 int err = 0;
690 u8 args[4], *argbuf = args;
691 u8 xfer_rate = 0;
692 int argsize = 4;
693 ide_task_t tfargs;
694
695 if (NULL == (void *) arg) {
696 struct request rq;
697 ide_init_drive_cmd(&rq);
698 return ide_do_drive_cmd(drive, &rq, ide_wait);
699 }
700
701 if (copy_from_user(args, (void __user *)arg, 4))
702 return -EFAULT;
703
704 memset(&tfargs, 0, sizeof(ide_task_t));
705 tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
706 tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
707 tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
708 tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
709 tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
710 tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
711 tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
712
713 if (args[3]) {
714 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
715 argbuf = kzalloc(argsize, GFP_KERNEL);
716 if (argbuf == NULL)
717 return -ENOMEM;
718 }
719 if (set_transfer(drive, &tfargs)) {
720 xfer_rate = args[1];
721 if (ide_ata66_check(drive, &tfargs))
722 goto abort;
723 }
724
725 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
726
727 if (!err && xfer_rate) {
728 /* active-retuning-calls future */
729 ide_set_xfer_rate(drive, xfer_rate);
730 ide_driveid_update(drive);
731 }
732 abort:
733 if (copy_to_user((void __user *)arg, argbuf, argsize))
734 err = -EFAULT;
735 if (argsize > 4)
736 kfree(argbuf);
737 return err;
738 }
739
740 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
741 {
742 struct request rq;
743
744 ide_init_drive_cmd(&rq);
745 rq.cmd_type = REQ_TYPE_ATA_TASK;
746 rq.buffer = buf;
747 return ide_do_drive_cmd(drive, &rq, ide_wait);
748 }
749
750 /*
751 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
752 */
753 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
754 {
755 void __user *p = (void __user *)arg;
756 int err = 0;
757 u8 args[7], *argbuf = args;
758 int argsize = 7;
759
760 if (copy_from_user(args, p, 7))
761 return -EFAULT;
762 err = ide_wait_cmd_task(drive, argbuf);
763 if (copy_to_user(p, argbuf, argsize))
764 err = -EFAULT;
765 return err;
766 }
767
768 /*
769 * NOTICE: This is additions from IBM to provide a discrete interface,
770 * for selective taskregister access operations. Nice JOB Klaus!!!
771 * Glad to be able to work and co-develop this with you and IBM.
772 */
773 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
774 {
775 ide_hwif_t *hwif = HWIF(drive);
776 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
777 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
778
779 if (task->data_phase == TASKFILE_MULTI_IN ||
780 task->data_phase == TASKFILE_MULTI_OUT) {
781 if (!drive->mult_count) {
782 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
783 return ide_stopped;
784 }
785 }
786
787 /*
788 * (ks) Check taskfile in flags.
789 * If set, then execute as it is defined.
790 * If not set, then define default settings.
791 * The default values are:
792 * read all taskfile registers (except data)
793 * read the hob registers (sector, nsector, lcyl, hcyl)
794 */
795 if (task->tf_in_flags.all == 0) {
796 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
797 if (drive->addressing == 1)
798 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
799 }
800
801 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
802 if (IDE_CONTROL_REG)
803 /* clear nIEN */
804 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
805 SELECT_MASK(drive, 0);
806
807 if (task->tf_out_flags.b.data) {
808 u16 data = taskfile->data + (hobfile->data << 8);
809 hwif->OUTW(data, IDE_DATA_REG);
810 }
811
812 /* (ks) send hob registers first */
813 if (task->tf_out_flags.b.nsector_hob)
814 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
815 if (task->tf_out_flags.b.sector_hob)
816 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
817 if (task->tf_out_flags.b.lcyl_hob)
818 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
819 if (task->tf_out_flags.b.hcyl_hob)
820 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
821
822 /* (ks) Send now the standard registers */
823 if (task->tf_out_flags.b.error_feature)
824 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
825 /* refers to number of sectors to transfer */
826 if (task->tf_out_flags.b.nsector)
827 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
828 /* refers to sector offset or start sector */
829 if (task->tf_out_flags.b.sector)
830 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
831 if (task->tf_out_flags.b.lcyl)
832 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
833 if (task->tf_out_flags.b.hcyl)
834 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
835
836 /*
837 * (ks) In the flagged taskfile approch, we will use all specified
838 * registers and the register value will not be changed, except the
839 * select bit (master/slave) in the drive_head register. We must make
840 * sure that the desired drive is selected.
841 */
842 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
843 switch(task->data_phase) {
844
845 case TASKFILE_OUT_DMAQ:
846 case TASKFILE_OUT_DMA:
847 case TASKFILE_IN_DMAQ:
848 case TASKFILE_IN_DMA:
849 hwif->dma_setup(drive);
850 hwif->dma_exec_cmd(drive, taskfile->command);
851 hwif->dma_start(drive);
852 break;
853
854 default:
855 if (task->handler == NULL)
856 return ide_stopped;
857
858 /* Issue the command */
859 if (task->prehandler) {
860 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
861 ndelay(400); /* FIXME */
862 return task->prehandler(drive, task->rq);
863 }
864 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
865 }
866
867 return ide_started;
868 }
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