ia64/linux-2.6.18-xen.hg

view drivers/ide/ide-taskfile.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
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 */
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>
49 #include <asm/byteorder.h>
50 #include <asm/irq.h>
51 #include <asm/uaccess.h>
52 #include <asm/io.h>
54 static void ata_bswap_data (void *buffer, int wcount)
55 {
56 u16 *p = buffer;
58 while (wcount--) {
59 *p = *p << 8 | *p >> 8; p++;
60 *p = *p << 8 | *p >> 8; p++;
61 }
62 }
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 }
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 }
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 }
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;
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);
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 }
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);
125 hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
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 }
137 if (!drive->using_dma)
138 return ide_stopped;
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 }
159 return ide_stopped;
160 }
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;
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 }
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;
189 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
190 udelay(10);
192 if (OK_STAT(stat, READY_STAT, BAD_STAT))
193 return ide_stopped;
195 if (stat & (ERR_STAT|DRQ_STAT))
196 return ide_error(drive, "set_geometry_intr", stat);
198 BUG_ON(HWGROUP(drive)->handler != NULL);
199 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
200 return ide_started;
201 }
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;
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 }
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;
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));
233 return ide_stopped;
234 }
236 EXPORT_SYMBOL(task_no_data_intr);
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;
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);
252 if (!retries)
253 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
255 return stat;
256 }
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;
269 page = sg[hwif->cursg].page;
270 offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
272 /* get the current page and offset */
273 page = nth_page(page, (offset >> PAGE_SHIFT));
274 offset %= PAGE_SIZE;
276 #ifdef CONFIG_HIGHMEM
277 local_irq_save(flags);
278 #endif
279 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
281 hwif->nleft--;
282 hwif->cursg_ofs++;
284 if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
285 hwif->cursg++;
286 hwif->cursg_ofs = 0;
287 }
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);
295 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
296 #ifdef CONFIG_HIGHMEM
297 local_irq_restore(flags);
298 #endif
299 }
301 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
302 {
303 unsigned int nsect;
305 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
306 while (nsect--)
307 ide_pio_sector(drive, write);
308 }
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;
316 touch_softlockup_watchdog();
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 }
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;
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 }
354 if (sectors > 0) {
355 ide_driver_t *drv;
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 }
364 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
365 {
366 if (rq->flags & REQ_DRIVE_TASKFILE) {
367 ide_task_t *task = rq->special;
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 }
376 if (rq->rq_disk) {
377 ide_driver_t *drv;
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 }
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);
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 }
403 ide_pio_datablock(drive, rq, 0);
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 }
414 /* Still data left to transfer. */
415 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
417 return ide_started;
418 }
419 EXPORT_SYMBOL(task_in_intr);
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);
430 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
431 return task_error(drive, rq, __FUNCTION__, stat);
433 /* Deal with unexpected ATA data phase. */
434 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
435 return task_error(drive, rq, __FUNCTION__, stat);
437 if (!hwif->nleft) {
438 task_end_request(drive, rq, stat);
439 return ide_stopped;
440 }
442 /* Still data left to transfer. */
443 ide_pio_datablock(drive, rq, 1);
444 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
446 return ide_started;
447 }
449 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
450 {
451 ide_startstop_t startstop;
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 }
462 if (!drive->unmask)
463 local_irq_disable();
465 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
466 ide_pio_datablock(drive, rq, 1);
468 return ide_started;
469 }
470 EXPORT_SYMBOL(pre_task_out_intr);
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;
476 memset(&rq, 0, sizeof(rq));
477 rq.flags = REQ_DRIVE_TASKFILE;
478 rq.buffer = buf;
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;
492 if (!rq.nr_sectors) {
493 printk(KERN_ERR "%s: in/out command without data\n",
494 drive->name);
495 return -EFAULT;
496 }
498 rq.hard_nr_sectors = rq.nr_sectors;
499 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
501 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
502 rq.flags |= REQ_RW;
503 }
505 rq.special = args;
506 args->rq = &rq;
507 return ide_do_drive_cmd(drive, &rq, ide_wait);
508 }
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 }
515 EXPORT_SYMBOL(ide_raw_taskfile);
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 int taskin = 0;
528 int taskout = 0;
529 u8 io_32bit = drive->io_32bit;
530 char __user *buf = (char __user *)arg;
532 // printk("IDE Taskfile ...\n");
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 }
541 taskout = (int) req_task->out_size;
542 taskin = (int) req_task->in_size;
544 if (taskout) {
545 int outtotal = tasksize;
546 outbuf = kzalloc(taskout, GFP_KERNEL);
547 if (outbuf == NULL) {
548 err = -ENOMEM;
549 goto abort;
550 }
551 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
552 err = -EFAULT;
553 goto abort;
554 }
555 }
557 if (taskin) {
558 int intotal = tasksize + taskout;
559 inbuf = kzalloc(taskin, GFP_KERNEL);
560 if (inbuf == NULL) {
561 err = -ENOMEM;
562 goto abort;
563 }
564 if (copy_from_user(inbuf, buf + intotal, taskin)) {
565 err = -EFAULT;
566 goto abort;
567 }
568 }
570 memset(&args, 0, sizeof(ide_task_t));
571 memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
572 memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
574 args.tf_in_flags = req_task->in_flags;
575 args.tf_out_flags = req_task->out_flags;
576 args.data_phase = req_task->data_phase;
577 args.command_type = req_task->req_cmd;
579 drive->io_32bit = 0;
580 switch(req_task->data_phase) {
581 case TASKFILE_OUT_DMAQ:
582 case TASKFILE_OUT_DMA:
583 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
584 break;
585 case TASKFILE_IN_DMAQ:
586 case TASKFILE_IN_DMA:
587 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
588 break;
589 case TASKFILE_MULTI_OUT:
590 if (!drive->mult_count) {
591 /* (hs): give up if multcount is not set */
592 printk(KERN_ERR "%s: %s Multimode Write " \
593 "multcount is not set\n",
594 drive->name, __FUNCTION__);
595 err = -EPERM;
596 goto abort;
597 }
598 /* fall through */
599 case TASKFILE_OUT:
600 args.prehandler = &pre_task_out_intr;
601 args.handler = &task_out_intr;
602 err = ide_diag_taskfile(drive, &args, taskout, outbuf);
603 break;
604 case TASKFILE_MULTI_IN:
605 if (!drive->mult_count) {
606 /* (hs): give up if multcount is not set */
607 printk(KERN_ERR "%s: %s Multimode Read failure " \
608 "multcount is not set\n",
609 drive->name, __FUNCTION__);
610 err = -EPERM;
611 goto abort;
612 }
613 /* fall through */
614 case TASKFILE_IN:
615 args.handler = &task_in_intr;
616 err = ide_diag_taskfile(drive, &args, taskin, inbuf);
617 break;
618 case TASKFILE_NO_DATA:
619 args.handler = &task_no_data_intr;
620 err = ide_diag_taskfile(drive, &args, 0, NULL);
621 break;
622 default:
623 err = -EFAULT;
624 goto abort;
625 }
627 memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
628 memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
629 req_task->in_flags = args.tf_in_flags;
630 req_task->out_flags = args.tf_out_flags;
632 if (copy_to_user(buf, req_task, tasksize)) {
633 err = -EFAULT;
634 goto abort;
635 }
636 if (taskout) {
637 int outtotal = tasksize;
638 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
639 err = -EFAULT;
640 goto abort;
641 }
642 }
643 if (taskin) {
644 int intotal = tasksize + taskout;
645 if (copy_to_user(buf + intotal, inbuf, taskin)) {
646 err = -EFAULT;
647 goto abort;
648 }
649 }
650 abort:
651 kfree(req_task);
652 kfree(outbuf);
653 kfree(inbuf);
655 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
657 drive->io_32bit = io_32bit;
659 return err;
660 }
662 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
663 {
664 struct request rq;
665 u8 buffer[4];
667 if (!buf)
668 buf = buffer;
669 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
670 ide_init_drive_cmd(&rq);
671 rq.buffer = buf;
672 *buf++ = cmd;
673 *buf++ = nsect;
674 *buf++ = feature;
675 *buf++ = sectors;
676 return ide_do_drive_cmd(drive, &rq, ide_wait);
677 }
679 /*
680 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
681 */
682 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
683 {
684 int err = 0;
685 u8 args[4], *argbuf = args;
686 u8 xfer_rate = 0;
687 int argsize = 4;
688 ide_task_t tfargs;
690 if (NULL == (void *) arg) {
691 struct request rq;
692 ide_init_drive_cmd(&rq);
693 return ide_do_drive_cmd(drive, &rq, ide_wait);
694 }
696 if (copy_from_user(args, (void __user *)arg, 4))
697 return -EFAULT;
699 memset(&tfargs, 0, sizeof(ide_task_t));
700 tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
701 tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
702 tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
703 tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
704 tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
705 tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
706 tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
708 if (args[3]) {
709 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
710 argbuf = kzalloc(argsize, GFP_KERNEL);
711 if (argbuf == NULL)
712 return -ENOMEM;
713 }
714 if (set_transfer(drive, &tfargs)) {
715 xfer_rate = args[1];
716 if (ide_ata66_check(drive, &tfargs))
717 goto abort;
718 }
720 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
722 if (!err && xfer_rate) {
723 /* active-retuning-calls future */
724 ide_set_xfer_rate(drive, xfer_rate);
725 ide_driveid_update(drive);
726 }
727 abort:
728 if (copy_to_user((void __user *)arg, argbuf, argsize))
729 err = -EFAULT;
730 if (argsize > 4)
731 kfree(argbuf);
732 return err;
733 }
735 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
736 {
737 struct request rq;
739 ide_init_drive_cmd(&rq);
740 rq.flags = REQ_DRIVE_TASK;
741 rq.buffer = buf;
742 return ide_do_drive_cmd(drive, &rq, ide_wait);
743 }
745 /*
746 * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
747 */
748 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
749 {
750 void __user *p = (void __user *)arg;
751 int err = 0;
752 u8 args[7], *argbuf = args;
753 int argsize = 7;
755 if (copy_from_user(args, p, 7))
756 return -EFAULT;
757 err = ide_wait_cmd_task(drive, argbuf);
758 if (copy_to_user(p, argbuf, argsize))
759 err = -EFAULT;
760 return err;
761 }
763 /*
764 * NOTICE: This is additions from IBM to provide a discrete interface,
765 * for selective taskregister access operations. Nice JOB Klaus!!!
766 * Glad to be able to work and co-develop this with you and IBM.
767 */
768 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
769 {
770 ide_hwif_t *hwif = HWIF(drive);
771 task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
772 hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
774 if (task->data_phase == TASKFILE_MULTI_IN ||
775 task->data_phase == TASKFILE_MULTI_OUT) {
776 if (!drive->mult_count) {
777 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
778 return ide_stopped;
779 }
780 }
782 /*
783 * (ks) Check taskfile in flags.
784 * If set, then execute as it is defined.
785 * If not set, then define default settings.
786 * The default values are:
787 * read all taskfile registers (except data)
788 * read the hob registers (sector, nsector, lcyl, hcyl)
789 */
790 if (task->tf_in_flags.all == 0) {
791 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
792 if (drive->addressing == 1)
793 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
794 }
796 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
797 if (IDE_CONTROL_REG)
798 /* clear nIEN */
799 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
800 SELECT_MASK(drive, 0);
802 if (task->tf_out_flags.b.data) {
803 u16 data = taskfile->data + (hobfile->data << 8);
804 hwif->OUTW(data, IDE_DATA_REG);
805 }
807 /* (ks) send hob registers first */
808 if (task->tf_out_flags.b.nsector_hob)
809 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
810 if (task->tf_out_flags.b.sector_hob)
811 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
812 if (task->tf_out_flags.b.lcyl_hob)
813 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
814 if (task->tf_out_flags.b.hcyl_hob)
815 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
817 /* (ks) Send now the standard registers */
818 if (task->tf_out_flags.b.error_feature)
819 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
820 /* refers to number of sectors to transfer */
821 if (task->tf_out_flags.b.nsector)
822 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
823 /* refers to sector offset or start sector */
824 if (task->tf_out_flags.b.sector)
825 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
826 if (task->tf_out_flags.b.lcyl)
827 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
828 if (task->tf_out_flags.b.hcyl)
829 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
831 /*
832 * (ks) In the flagged taskfile approch, we will use all specified
833 * registers and the register value will not be changed, except the
834 * select bit (master/slave) in the drive_head register. We must make
835 * sure that the desired drive is selected.
836 */
837 hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
838 switch(task->data_phase) {
840 case TASKFILE_OUT_DMAQ:
841 case TASKFILE_OUT_DMA:
842 case TASKFILE_IN_DMAQ:
843 case TASKFILE_IN_DMA:
844 hwif->dma_setup(drive);
845 hwif->dma_exec_cmd(drive, taskfile->command);
846 hwif->dma_start(drive);
847 break;
849 default:
850 if (task->handler == NULL)
851 return ide_stopped;
853 /* Issue the command */
854 if (task->prehandler) {
855 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
856 ndelay(400); /* FIXME */
857 return task->prehandler(drive, task->rq);
858 }
859 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
860 }
862 return ide_started;
863 }