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[PATCH] Unlinline a bunch of other functions
[linux-2.6-block.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.
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/config.h>
31#include <linux/module.h>
32#include <linux/types.h>
33#include <linux/string.h>
34#include <linux/kernel.h>
35#include <linux/timer.h>
36#include <linux/mm.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
1da177e4
LT		 54static 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
64static 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
71static 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
82int 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
97ide_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
1da177e4
LT		 162/*
163 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
164 */
165ide_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 */
183ide_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 if (HWGROUP(drive)->handler != NULL)
199 BUG();
200 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
201 return ide_started;
202}
203
204/*
205 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
206 */
207ide_startstop_t recal_intr (ide_drive_t *drive)
208{
209 ide_hwif_t *hwif = HWIF(drive);
210 u8 stat;
211
212 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
213 return ide_error(drive, "recal_intr", stat);
214 return ide_stopped;
215}
216
217/*
218 * Handler for commands without a data phase
219 */
220ide_startstop_t task_no_data_intr (ide_drive_t *drive)
221{
222 ide_task_t *args = HWGROUP(drive)->rq->special;
223 ide_hwif_t *hwif = HWIF(drive);
224 u8 stat;
225
226 local_irq_enable();
227 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
228 return ide_error(drive, "task_no_data_intr", stat);
229 /* calls ide_end_drive_cmd */
230 }
231 if (args)
232 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
233
234 return ide_stopped;
235}
236
237EXPORT_SYMBOL(task_no_data_intr);
238
239static u8 wait_drive_not_busy(ide_drive_t *drive)
240{
241 ide_hwif_t *hwif = HWIF(drive);
242 int retries = 100;
243 u8 stat;
244
245 /*
246 * Last sector was transfered, wait until drive is ready.
247 * This can take up to 10 usec, but we will wait max 1 ms
248 * (drive_cmd_intr() waits that long).
249 */
250 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
251 udelay(10);
252
253 if (!retries)
254 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
255
256 return stat;
257}
258
259static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
260{
261 ide_hwif_t *hwif = drive->hwif;
262 struct scatterlist *sg = hwif->sg_table;
263 struct page *page;
264#ifdef CONFIG_HIGHMEM
265 unsigned long flags;
266#endif
267 unsigned int offset;
268 u8 *buf;
269
270 page = sg[hwif->cursg].page;
271 offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
272
273 /* get the current page and offset */
274 page = nth_page(page, (offset >> PAGE_SHIFT));
275 offset %= PAGE_SIZE;
276
277#ifdef CONFIG_HIGHMEM
278 local_irq_save(flags);
279#endif
280 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
281
282 hwif->nleft--;
283 hwif->cursg_ofs++;
284
285 if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
286 hwif->cursg++;
287 hwif->cursg_ofs = 0;
288 }
289
290 /* do the actual data transfer */
291 if (write)
292 taskfile_output_data(drive, buf, SECTOR_WORDS);
293 else
294 taskfile_input_data(drive, buf, SECTOR_WORDS);
295
296 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
297#ifdef CONFIG_HIGHMEM
298 local_irq_restore(flags);
299#endif
300}
301
302static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
303{
304 unsigned int nsect;
305
306 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
307 while (nsect--)
308 ide_pio_sector(drive, write);
309}
310
858119e1 311static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
1da177e4
LT		 312 unsigned int write)
313{
314 if (rq->bio) /* fs request */
315 rq->errors = 0;
316
317 switch (drive->hwif->data_phase) {
318 case TASKFILE_MULTI_IN:
319 case TASKFILE_MULTI_OUT:
320 ide_pio_multi(drive, write);
321 break;
322 default:
323 ide_pio_sector(drive, write);
324 break;
325 }
326}
327
328static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
329 const char *s, u8 stat)
330{
331 if (rq->bio) {
332 ide_hwif_t *hwif = drive->hwif;
333 int sectors = hwif->nsect - hwif->nleft;
334
335 switch (hwif->data_phase) {
336 case TASKFILE_IN:
337 if (hwif->nleft)
338 break;
339 /* fall through */
340 case TASKFILE_OUT:
341 sectors--;
342 break;
343 case TASKFILE_MULTI_IN:
344 if (hwif->nleft)
345 break;
346 /* fall through */
347 case TASKFILE_MULTI_OUT:
348 sectors -= drive->mult_count;
349 default:
350 break;
351 }
352
353 if (sectors > 0) {
354 ide_driver_t *drv;
355
356 drv = *(ide_driver_t **)rq->rq_disk->private_data;
357 drv->end_request(drive, 1, sectors);
358 }
359 }
360 return ide_error(drive, s, stat);
361}
362
363static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
364{
365 if (rq->flags & REQ_DRIVE_TASKFILE) {
366 ide_task_t *task = rq->special;
367
368 if (task->tf_out_flags.all) {
369 u8 err = drive->hwif->INB(IDE_ERROR_REG);
370 ide_end_drive_cmd(drive, stat, err);
371 return;
372 }
373 }
374
375 ide_end_request(drive, 1, rq->hard_nr_sectors);
376}
377
378/*
379 * Handler for command with PIO data-in phase (Read/Read Multiple).
380 */
381ide_startstop_t task_in_intr (ide_drive_t *drive)
382{
383 ide_hwif_t *hwif = drive->hwif;
384 struct request *rq = HWGROUP(drive)->rq;
385 u8 stat = hwif->INB(IDE_STATUS_REG);
386
387 /* new way for dealing with premature shared PCI interrupts */
388 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
389 if (stat & (ERR_STAT | DRQ_STAT))
390 return task_error(drive, rq, __FUNCTION__, stat);
391 /* No data yet, so wait for another IRQ. */
392 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
393 return ide_started;
394 }
395
396 ide_pio_datablock(drive, rq, 0);
397
398 /* If it was the last datablock check status and finish transfer. */
399 if (!hwif->nleft) {
400 stat = wait_drive_not_busy(drive);
401 if (!OK_STAT(stat, 0, BAD_R_STAT))
402 return task_error(drive, rq, __FUNCTION__, stat);
403 task_end_request(drive, rq, stat);
404 return ide_stopped;
405 }
406
407 /* Still data left to transfer. */
408 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
409
410 return ide_started;
411}
412EXPORT_SYMBOL(task_in_intr);
413
414/*
415 * Handler for command with PIO data-out phase (Write/Write Multiple).
416 */
417static ide_startstop_t task_out_intr (ide_drive_t *drive)
418{
419 ide_hwif_t *hwif = drive->hwif;
420 struct request *rq = HWGROUP(drive)->rq;
421 u8 stat = hwif->INB(IDE_STATUS_REG);
422
423 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
424 return task_error(drive, rq, __FUNCTION__, stat);
425
426 /* Deal with unexpected ATA data phase. */
427 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
428 return task_error(drive, rq, __FUNCTION__, stat);
429
430 if (!hwif->nleft) {
431 task_end_request(drive, rq, stat);
432 return ide_stopped;
433 }
434
435 /* Still data left to transfer. */
436 ide_pio_datablock(drive, rq, 1);
437 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
438
439 return ide_started;
440}
441
442ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
443{
444 ide_startstop_t startstop;
445
446 if (ide_wait_stat(&startstop, drive, DATA_READY,
447 drive->bad_wstat, WAIT_DRQ)) {
448 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
449 drive->name,
450 drive->hwif->data_phase ? "MULT" : "",
451 drive->addressing ? "_EXT" : "");
452 return startstop;
453 }
454
455 if (!drive->unmask)
456 local_irq_disable();
457
458 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
459 ide_pio_datablock(drive, rq, 1);
460
461 return ide_started;
462}
463EXPORT_SYMBOL(pre_task_out_intr);
464
465static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
466{
467 struct request rq;
468
469 memset(&rq, 0, sizeof(rq));
470 rq.flags = REQ_DRIVE_TASKFILE;
471 rq.buffer = buf;
472
473 /*
474 * (ks) We transfer currently only whole sectors.
475 * This is suffient for now. But, it would be great,
476 * if we would find a solution to transfer any size.
477 * To support special commands like READ LONG.
478 */
479 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
480 if (data_size == 0)
481 rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
482 else
483 rq.nr_sectors = data_size / SECTOR_SIZE;
484
485 if (!rq.nr_sectors) {
486 printk(KERN_ERR "%s: in/out command without data\n",
487 drive->name);
488 return -EFAULT;
489 }
490
491 rq.hard_nr_sectors = rq.nr_sectors;
492 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
493
494 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
495 rq.flags |= REQ_RW;
496 }
497
498 rq.special = args;
ef0f6a43 499 args->rq = &rq;
1da177e4
LT		 500 return ide_do_drive_cmd(drive, &rq, ide_wait);
501}
502
503int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
504{
505 return ide_diag_taskfile(drive, args, 0, buf);
506}
507
508EXPORT_SYMBOL(ide_raw_taskfile);
509
510int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
511{
512 ide_task_request_t *req_task;
513 ide_task_t args;
514 u8 *outbuf = NULL;
515 u8 *inbuf = NULL;
516 task_ioreg_t *argsptr = args.tfRegister;
517 task_ioreg_t *hobsptr = args.hobRegister;
518 int err = 0;
519 int tasksize = sizeof(struct ide_task_request_s);
520 int taskin = 0;
521 int taskout = 0;
522 u8 io_32bit = drive->io_32bit;
523 char __user *buf = (char __user *)arg;
524
525// printk("IDE Taskfile ...\n");
526
f5e3c2fa 527 req_task = kzalloc(tasksize, GFP_KERNEL);
1da177e4 528 if (req_task == NULL) return -ENOMEM;
1da177e4
LT		 529 if (copy_from_user(req_task, buf, tasksize)) {
530 kfree(req_task);
531 return -EFAULT;
532 }
533
534 taskout = (int) req_task->out_size;
535 taskin = (int) req_task->in_size;
536
537 if (taskout) {
538 int outtotal = tasksize;
f5e3c2fa 539 outbuf = kzalloc(taskout, GFP_KERNEL);
1da177e4
LT		 540 if (outbuf == NULL) {
541 err = -ENOMEM;
542 goto abort;
543 }
1da177e4
LT		 544 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
545 err = -EFAULT;
546 goto abort;
547 }
548 }
549
550 if (taskin) {
551 int intotal = tasksize + taskout;
f5e3c2fa 552 inbuf = kzalloc(taskin, GFP_KERNEL);
1da177e4
LT		 553 if (inbuf == NULL) {
554 err = -ENOMEM;
555 goto abort;
556 }
1da177e4
LT		 557 if (copy_from_user(inbuf, buf + intotal, taskin)) {
558 err = -EFAULT;
559 goto abort;
560 }
561 }
562
563 memset(&args, 0, sizeof(ide_task_t));
564 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
565 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
566
567 args.tf_in_flags = req_task->in_flags;
568 args.tf_out_flags = req_task->out_flags;
569 args.data_phase = req_task->data_phase;
570 args.command_type = req_task->req_cmd;
571
572 drive->io_32bit = 0;
573 switch(req_task->data_phase) {
574 case TASKFILE_OUT_DMAQ:
575 case TASKFILE_OUT_DMA:
576 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
577 break;
578 case TASKFILE_IN_DMAQ:
579 case TASKFILE_IN_DMA:
580 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
581 break;
582 case TASKFILE_MULTI_OUT:
583 if (!drive->mult_count) {
584 /* (hs): give up if multcount is not set */
585 printk(KERN_ERR "%s: %s Multimode Write " \
586 "multcount is not set\n",
587 drive->name, __FUNCTION__);
588 err = -EPERM;
589 goto abort;
590 }
591 /* fall through */
592 case TASKFILE_OUT:
593 args.prehandler = &pre_task_out_intr;
594 args.handler = &task_out_intr;
595 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
596 break;
597 case TASKFILE_MULTI_IN:
598 if (!drive->mult_count) {
599 /* (hs): give up if multcount is not set */
600 printk(KERN_ERR "%s: %s Multimode Read failure " \
601 "multcount is not set\n",
602 drive->name, __FUNCTION__);
603 err = -EPERM;
604 goto abort;
605 }
606 /* fall through */
607 case TASKFILE_IN:
608 args.handler = &task_in_intr;
609 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
610 break;
611 case TASKFILE_NO_DATA:
612 args.handler = &task_no_data_intr;
613 err = ide_diag_taskfile(drive, &args, 0, NULL);
614 break;
615 default:
616 err = -EFAULT;
617 goto abort;
618 }
619
620 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
621 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
622 req_task->in_flags = args.tf_in_flags;
623 req_task->out_flags = args.tf_out_flags;
624
625 if (copy_to_user(buf, req_task, tasksize)) {
626 err = -EFAULT;
627 goto abort;
628 }
629 if (taskout) {
630 int outtotal = tasksize;
631 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
632 err = -EFAULT;
633 goto abort;
634 }
635 }
636 if (taskin) {
637 int intotal = tasksize + taskout;
638 if (copy_to_user(buf + intotal, inbuf, taskin)) {
639 err = -EFAULT;
640 goto abort;
641 }
642 }
643abort:
644 kfree(req_task);
6044ec88
JJ		 645 kfree(outbuf);
646 kfree(inbuf);
1da177e4
LT		 647
648// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
649
650 drive->io_32bit = io_32bit;
651
652 return err;
653}
654
655int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
656{
657 struct request rq;
658 u8 buffer[4];
659
660 if (!buf)
661 buf = buffer;
662 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
663 ide_init_drive_cmd(&rq);
664 rq.buffer = buf;
665 *buf++ = cmd;
666 *buf++ = nsect;
667 *buf++ = feature;
668 *buf++ = sectors;
669 return ide_do_drive_cmd(drive, &rq, ide_wait);
670}
671
672/*
673 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
674 */
675int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
676{
677 int err = 0;
678 u8 args[4], *argbuf = args;
679 u8 xfer_rate = 0;
680 int argsize = 4;
681 ide_task_t tfargs;
682
683 if (NULL == (void *) arg) {
684 struct request rq;
685 ide_init_drive_cmd(&rq);
686 return ide_do_drive_cmd(drive, &rq, ide_wait);
687 }
688
689 if (copy_from_user(args, (void __user *)arg, 4))
690 return -EFAULT;
691
692 memset(&tfargs, 0, sizeof(ide_task_t));
693 tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
694 tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
695 tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
696 tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
697 tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
698 tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
699 tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
700
701 if (args[3]) {
702 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
f5e3c2fa 703 argbuf = kzalloc(argsize, GFP_KERNEL);
1da177e4
LT		 704 if (argbuf == NULL)
705 return -ENOMEM;
1da177e4
LT		 706 }
707 if (set_transfer(drive, &tfargs)) {
708 xfer_rate = args[1];
709 if (ide_ata66_check(drive, &tfargs))
710 goto abort;
711 }
712
713 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
714
715 if (!err && xfer_rate) {
716 /* active-retuning-calls future */
717 ide_set_xfer_rate(drive, xfer_rate);
718 ide_driveid_update(drive);
719 }
720abort:
721 if (copy_to_user((void __user *)arg, argbuf, argsize))
722 err = -EFAULT;
723 if (argsize > 4)
724 kfree(argbuf);
725 return err;
726}
727
728static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
729{
730 struct request rq;
731
732 ide_init_drive_cmd(&rq);
733 rq.flags = REQ_DRIVE_TASK;
734 rq.buffer = buf;
735 return ide_do_drive_cmd(drive, &rq, ide_wait);
736}
737
738/*
739 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
740 */
741int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
742{
743 void __user *p = (void __user *)arg;
744 int err = 0;
745 u8 args[7], *argbuf = args;
746 int argsize = 7;
747
748 if (copy_from_user(args, p, 7))
749 return -EFAULT;
750 err = ide_wait_cmd_task(drive, argbuf);
751 if (copy_to_user(p, argbuf, argsize))
752 err = -EFAULT;
753 return err;
754}
755
756/*
757 * NOTICE: This is additions from IBM to provide a discrete interface,
758 * for selective taskregister access operations. Nice JOB Klaus!!!
759 * Glad to be able to work and co-develop this with you and IBM.
760 */
761ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
762{
763 ide_hwif_t *hwif = HWIF(drive);
764 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
765 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
1da177e4
LT		 766
767 if (task->data_phase == TASKFILE_MULTI_IN ||
768 task->data_phase == TASKFILE_MULTI_OUT) {
769 if (!drive->mult_count) {
770 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
771 return ide_stopped;
772 }
773 }
774
775 /*
e07bc709 776 * (ks) Check taskfile in flags.
1da177e4
LT		 777 * If set, then execute as it is defined.
778 * If not set, then define default settings.
779 * The default values are:
e07bc709
BZ		 780 * read all taskfile registers (except data)
781 * read the hob registers (sector, nsector, lcyl, hcyl)
1da177e4 782 */
1da177e4
LT		 783 if (task->tf_in_flags.all == 0) {
784 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
785 if (drive->addressing == 1)
786 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
787 }
788
789 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
790 if (IDE_CONTROL_REG)
791 /* clear nIEN */
792 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
793 SELECT_MASK(drive, 0);
794
1da177e4
LT		 795 if (task->tf_out_flags.b.data) {
796 u16 data = taskfile->data + (hobfile->data << 8);
797 hwif->OUTW(data, IDE_DATA_REG);
798 }
799
800 /* (ks) send hob registers first */
801 if (task->tf_out_flags.b.nsector_hob)
802 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
803 if (task->tf_out_flags.b.sector_hob)
804 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
805 if (task->tf_out_flags.b.lcyl_hob)
806 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
807 if (task->tf_out_flags.b.hcyl_hob)
808 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
809
810 /* (ks) Send now the standard registers */
811 if (task->tf_out_flags.b.error_feature)
812 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
813 /* refers to number of sectors to transfer */
814 if (task->tf_out_flags.b.nsector)
815 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
816 /* refers to sector offset or start sector */
817 if (task->tf_out_flags.b.sector)
818 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
819 if (task->tf_out_flags.b.lcyl)
820 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
821 if (task->tf_out_flags.b.hcyl)
822 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
823
824 /*
825 * (ks) In the flagged taskfile approch, we will use all specified
826 * registers and the register value will not be changed, except the
827 * select bit (master/slave) in the drive_head register. We must make
828 * sure that the desired drive is selected.
829 */
830 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
831 switch(task->data_phase) {
832
833 case TASKFILE_OUT_DMAQ:
834 case TASKFILE_OUT_DMA:
835 case TASKFILE_IN_DMAQ:
836 case TASKFILE_IN_DMA:
837 hwif->dma_setup(drive);
838 hwif->dma_exec_cmd(drive, taskfile->command);
839 hwif->dma_start(drive);
840 break;
841
842 default:
843 if (task->handler == NULL)
844 return ide_stopped;
845
846 /* Issue the command */
847 if (task->prehandler) {
848 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
849 ndelay(400); /* FIXME */
850 return task->prehandler(drive, task->rq);
851 }
852 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
853 }
854
855 return ide_started;
856}
Linux 6.x block layer and io_uring tree(s)