2 * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003
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
10 * The big the bad and the ugly.
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/timer.h>
19 #include <linux/sched.h>
20 #include <linux/interrupt.h>
21 #include <linux/major.h>
22 #include <linux/errno.h>
23 #include <linux/genhd.h>
24 #include <linux/blkpg.h>
25 #include <linux/slab.h>
26 #include <linux/pci.h>
27 #include <linux/delay.h>
28 #include <linux/hdreg.h>
29 #include <linux/ide.h>
30 #include <linux/bitops.h>
31 #include <linux/scatterlist.h>
33 #include <asm/byteorder.h>
35 #include <asm/uaccess.h>
38 static void ata_bswap_data (void *buffer, int wcount)
43 *p = *p << 8 | *p >> 8; p++;
44 *p = *p << 8 | *p >> 8; p++;
48 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
50 HWIF(drive)->ata_input_data(drive, buffer, wcount);
52 ata_bswap_data(buffer, wcount);
55 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
58 ata_bswap_data(buffer, wcount);
59 HWIF(drive)->ata_output_data(drive, buffer, wcount);
60 ata_bswap_data(buffer, wcount);
62 HWIF(drive)->ata_output_data(drive, buffer, wcount);
66 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
68 ide_hwif_t *hwif = drive->hwif;
69 struct ide_taskfile *tf = &task->tf;
70 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
72 if (task->tf_flags & IDE_TFLAG_FLAGGED)
76 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
77 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
78 drive->name, tf->feature, tf->nsect, tf->lbal,
79 tf->lbam, tf->lbah, tf->device, tf->command);
83 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
85 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
86 SELECT_MASK(drive, 0);
88 if (task->tf_flags & IDE_TFLAG_OUT_DATA)
89 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
91 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
92 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
93 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
94 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
95 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
96 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
97 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
98 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
99 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
100 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
102 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
103 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
104 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
105 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
106 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
107 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
108 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
109 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
110 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
111 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
113 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
114 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
117 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
121 memset(&args, 0, sizeof(ide_task_t));
122 args.tf.nsect = 0x01;
123 if (drive->media == ide_disk)
124 args.tf.command = WIN_IDENTIFY;
126 args.tf.command = WIN_PIDENTIFY;
127 args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
128 args.data_phase = TASKFILE_IN;
129 return ide_raw_taskfile(drive, &args, buf, 1);
132 static int inline task_dma_ok(ide_task_t *task)
134 if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
137 switch (task->tf.command) {
138 case WIN_WRITEDMA_ONCE:
140 case WIN_WRITEDMA_EXT:
141 case WIN_READDMA_ONCE:
143 case WIN_READDMA_EXT:
144 case WIN_IDENTIFY_DMA:
151 static ide_startstop_t task_no_data_intr(ide_drive_t *);
152 static ide_startstop_t set_geometry_intr(ide_drive_t *);
153 static ide_startstop_t recal_intr(ide_drive_t *);
154 static ide_startstop_t set_multmode_intr(ide_drive_t *);
155 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
156 static ide_startstop_t task_in_intr(ide_drive_t *);
158 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
160 ide_hwif_t *hwif = HWIF(drive);
161 struct ide_taskfile *tf = &task->tf;
162 ide_handler_t *handler = NULL;
164 if (task->data_phase == TASKFILE_MULTI_IN ||
165 task->data_phase == TASKFILE_MULTI_OUT) {
166 if (!drive->mult_count) {
167 printk(KERN_ERR "%s: multimode not set!\n",
173 if (task->tf_flags & IDE_TFLAG_FLAGGED)
174 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
176 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
177 ide_tf_load(drive, task);
179 switch (task->data_phase) {
180 case TASKFILE_MULTI_OUT:
182 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
183 ndelay(400); /* FIXME */
184 return pre_task_out_intr(drive, task->rq);
185 case TASKFILE_MULTI_IN:
187 handler = task_in_intr;
189 case TASKFILE_NO_DATA:
191 handler = task_no_data_intr;
192 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
193 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
194 switch (tf->command) {
195 case WIN_SPECIFY: handler = set_geometry_intr; break;
196 case WIN_RESTORE: handler = recal_intr; break;
197 case WIN_SETMULT: handler = set_multmode_intr; break;
200 ide_execute_command(drive, tf->command, handler,
201 WAIT_WORSTCASE, NULL);
204 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
205 hwif->dma_setup(drive))
207 hwif->dma_exec_cmd(drive, tf->command);
208 hwif->dma_start(drive);
212 EXPORT_SYMBOL_GPL(do_rw_taskfile);
215 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
217 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
219 ide_hwif_t *hwif = HWIF(drive);
222 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
223 drive->mult_count = drive->mult_req;
225 drive->mult_req = drive->mult_count = 0;
226 drive->special.b.recalibrate = 1;
227 (void) ide_dump_status(drive, "set_multmode", stat);
233 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
235 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
237 ide_hwif_t *hwif = HWIF(drive);
241 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
244 if (OK_STAT(stat, READY_STAT, BAD_STAT))
247 if (stat & (ERR_STAT|DRQ_STAT))
248 return ide_error(drive, "set_geometry_intr", stat);
250 BUG_ON(HWGROUP(drive)->handler != NULL);
251 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
256 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
258 static ide_startstop_t recal_intr(ide_drive_t *drive)
260 ide_hwif_t *hwif = HWIF(drive);
263 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
264 return ide_error(drive, "recal_intr", stat);
269 * Handler for commands without a data phase
271 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
273 ide_task_t *args = HWGROUP(drive)->rq->special;
274 ide_hwif_t *hwif = HWIF(drive);
277 local_irq_enable_in_hardirq();
278 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
279 return ide_error(drive, "task_no_data_intr", stat);
280 /* calls ide_end_drive_cmd */
283 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
288 static u8 wait_drive_not_busy(ide_drive_t *drive)
290 ide_hwif_t *hwif = HWIF(drive);
295 * Last sector was transfered, wait until drive is ready.
296 * This can take up to 10 usec, but we will wait max 1 ms
297 * (drive_cmd_intr() waits that long).
299 for (retries = 0; retries < 100; retries++) {
300 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
306 if (stat & BUSY_STAT)
307 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
312 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
314 ide_hwif_t *hwif = drive->hwif;
315 struct scatterlist *sg = hwif->sg_table;
316 struct scatterlist *cursg = hwif->cursg;
318 #ifdef CONFIG_HIGHMEM
330 page = sg_page(cursg);
331 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
333 /* get the current page and offset */
334 page = nth_page(page, (offset >> PAGE_SHIFT));
337 #ifdef CONFIG_HIGHMEM
338 local_irq_save(flags);
340 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
345 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
346 hwif->cursg = sg_next(hwif->cursg);
350 /* do the actual data transfer */
352 taskfile_output_data(drive, buf, SECTOR_WORDS);
354 taskfile_input_data(drive, buf, SECTOR_WORDS);
356 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
357 #ifdef CONFIG_HIGHMEM
358 local_irq_restore(flags);
362 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
366 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
368 ide_pio_sector(drive, write);
371 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
374 if (rq->bio) /* fs request */
377 touch_softlockup_watchdog();
379 switch (drive->hwif->data_phase) {
380 case TASKFILE_MULTI_IN:
381 case TASKFILE_MULTI_OUT:
382 ide_pio_multi(drive, write);
385 ide_pio_sector(drive, write);
390 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
391 const char *s, u8 stat)
394 ide_hwif_t *hwif = drive->hwif;
395 int sectors = hwif->nsect - hwif->nleft;
397 switch (hwif->data_phase) {
405 case TASKFILE_MULTI_IN:
409 case TASKFILE_MULTI_OUT:
410 sectors -= drive->mult_count;
418 drv = *(ide_driver_t **)rq->rq_disk->private_data;
419 drv->end_request(drive, 1, sectors);
422 return ide_error(drive, s, stat);
425 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
427 HWIF(drive)->cursg = NULL;
429 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
430 ide_task_t *task = rq->special;
432 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
433 u8 err = drive->hwif->INB(IDE_ERROR_REG);
434 ide_end_drive_cmd(drive, stat, err);
442 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
443 drv->end_request(drive, 1, rq->hard_nr_sectors);
445 ide_end_request(drive, 1, rq->hard_nr_sectors);
449 * Handler for command with PIO data-in phase (Read/Read Multiple).
451 static ide_startstop_t task_in_intr(ide_drive_t *drive)
453 ide_hwif_t *hwif = drive->hwif;
454 struct request *rq = HWGROUP(drive)->rq;
455 u8 stat = hwif->INB(IDE_STATUS_REG);
457 /* new way for dealing with premature shared PCI interrupts */
458 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
459 if (stat & (ERR_STAT | DRQ_STAT))
460 return task_error(drive, rq, __FUNCTION__, stat);
461 /* No data yet, so wait for another IRQ. */
462 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
466 ide_pio_datablock(drive, rq, 0);
468 /* If it was the last datablock check status and finish transfer. */
470 stat = wait_drive_not_busy(drive);
471 if (!OK_STAT(stat, 0, BAD_R_STAT))
472 return task_error(drive, rq, __FUNCTION__, stat);
473 task_end_request(drive, rq, stat);
477 /* Still data left to transfer. */
478 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
484 * Handler for command with PIO data-out phase (Write/Write Multiple).
486 static ide_startstop_t task_out_intr (ide_drive_t *drive)
488 ide_hwif_t *hwif = drive->hwif;
489 struct request *rq = HWGROUP(drive)->rq;
490 u8 stat = hwif->INB(IDE_STATUS_REG);
492 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
493 return task_error(drive, rq, __FUNCTION__, stat);
495 /* Deal with unexpected ATA data phase. */
496 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
497 return task_error(drive, rq, __FUNCTION__, stat);
500 task_end_request(drive, rq, stat);
504 /* Still data left to transfer. */
505 ide_pio_datablock(drive, rq, 1);
506 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
511 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
513 ide_startstop_t startstop;
515 if (ide_wait_stat(&startstop, drive, DATA_READY,
516 drive->bad_wstat, WAIT_DRQ)) {
517 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
519 drive->hwif->data_phase ? "MULT" : "",
520 drive->addressing ? "_EXT" : "");
527 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
528 ide_pio_datablock(drive, rq, 1);
533 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
537 memset(&rq, 0, sizeof(rq));
539 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
543 * (ks) We transfer currently only whole sectors.
544 * This is suffient for now. But, it would be great,
545 * if we would find a solution to transfer any size.
546 * To support special commands like READ LONG.
548 rq.hard_nr_sectors = rq.nr_sectors = nsect;
549 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
551 if (task->tf_flags & IDE_TFLAG_WRITE)
552 rq.cmd_flags |= REQ_RW;
557 return ide_do_drive_cmd(drive, &rq, ide_wait);
560 EXPORT_SYMBOL(ide_raw_taskfile);
562 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
564 task->data_phase = TASKFILE_NO_DATA;
566 return ide_raw_taskfile(drive, task, NULL, 0);
568 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
570 #ifdef CONFIG_IDE_TASK_IOCTL
571 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
573 ide_task_request_t *req_task;
579 int tasksize = sizeof(struct ide_task_request_s);
580 unsigned int taskin = 0;
581 unsigned int taskout = 0;
583 u8 io_32bit = drive->io_32bit;
584 char __user *buf = (char __user *)arg;
586 // printk("IDE Taskfile ...\n");
588 req_task = kzalloc(tasksize, GFP_KERNEL);
589 if (req_task == NULL) return -ENOMEM;
590 if (copy_from_user(req_task, buf, tasksize)) {
595 taskout = req_task->out_size;
596 taskin = req_task->in_size;
598 if (taskin > 65536 || taskout > 65536) {
604 int outtotal = tasksize;
605 outbuf = kzalloc(taskout, GFP_KERNEL);
606 if (outbuf == NULL) {
610 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
617 int intotal = tasksize + taskout;
618 inbuf = kzalloc(taskin, GFP_KERNEL);
623 if (copy_from_user(inbuf, buf + intotal, taskin)) {
629 memset(&args, 0, sizeof(ide_task_t));
631 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
632 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
634 args.data_phase = req_task->data_phase;
636 args.tf_flags = IDE_TFLAG_OUT_DEVICE;
637 if (drive->addressing == 1)
638 args.tf_flags |= IDE_TFLAG_LBA48;
640 if (req_task->out_flags.all) {
641 args.tf_flags |= IDE_TFLAG_FLAGGED;
643 if (req_task->out_flags.b.data)
644 args.tf_flags |= IDE_TFLAG_OUT_DATA;
646 if (req_task->out_flags.b.nsector_hob)
647 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
648 if (req_task->out_flags.b.sector_hob)
649 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
650 if (req_task->out_flags.b.lcyl_hob)
651 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
652 if (req_task->out_flags.b.hcyl_hob)
653 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
655 if (req_task->out_flags.b.error_feature)
656 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
657 if (req_task->out_flags.b.nsector)
658 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
659 if (req_task->out_flags.b.sector)
660 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
661 if (req_task->out_flags.b.lcyl)
662 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
663 if (req_task->out_flags.b.hcyl)
664 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
666 args.tf_flags |= IDE_TFLAG_OUT_TF;
667 if (args.tf_flags & IDE_TFLAG_LBA48)
668 args.tf_flags |= IDE_TFLAG_OUT_HOB;
671 if (req_task->in_flags.b.data)
672 args.tf_flags |= IDE_TFLAG_IN_DATA;
675 switch(req_task->data_phase) {
676 case TASKFILE_MULTI_OUT:
677 if (!drive->mult_count) {
678 /* (hs): give up if multcount is not set */
679 printk(KERN_ERR "%s: %s Multimode Write " \
680 "multcount is not set\n",
681 drive->name, __FUNCTION__);
688 case TASKFILE_OUT_DMAQ:
689 case TASKFILE_OUT_DMA:
690 nsect = taskout / SECTOR_SIZE;
693 case TASKFILE_MULTI_IN:
694 if (!drive->mult_count) {
695 /* (hs): give up if multcount is not set */
696 printk(KERN_ERR "%s: %s Multimode Read failure " \
697 "multcount is not set\n",
698 drive->name, __FUNCTION__);
705 case TASKFILE_IN_DMAQ:
706 case TASKFILE_IN_DMA:
707 nsect = taskin / SECTOR_SIZE;
710 case TASKFILE_NO_DATA:
717 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
720 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
723 printk(KERN_ERR "%s: in/out command without data\n",
730 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
731 args.tf_flags |= IDE_TFLAG_WRITE;
733 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
735 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
736 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
738 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
739 req_task->in_flags.all == 0) {
740 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
741 if (drive->addressing == 1)
742 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
745 if (copy_to_user(buf, req_task, tasksize)) {
750 int outtotal = tasksize;
751 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
757 int intotal = tasksize + taskout;
758 if (copy_to_user(buf + intotal, inbuf, taskin)) {
768 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
770 drive->io_32bit = io_32bit;
776 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
783 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
784 ide_init_drive_cmd(&rq);
790 return ide_do_drive_cmd(drive, &rq, ide_wait);
793 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
796 u8 args[4], *argbuf = args;
800 struct ide_taskfile *tf = &tfargs.tf;
802 if (NULL == (void *) arg) {
804 ide_init_drive_cmd(&rq);
805 return ide_do_drive_cmd(drive, &rq, ide_wait);
808 if (copy_from_user(args, (void __user *)arg, 4))
811 memset(&tfargs, 0, sizeof(ide_task_t));
812 tf->feature = args[2];
815 tf->command = args[0];
818 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
819 argbuf = kzalloc(argsize, GFP_KERNEL);
823 if (set_transfer(drive, &tfargs)) {
825 if (ide_ata66_check(drive, &tfargs))
829 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
831 if (!err && xfer_rate) {
832 /* active-retuning-calls future */
833 ide_set_xfer_rate(drive, xfer_rate);
834 ide_driveid_update(drive);
837 if (copy_to_user((void __user *)arg, argbuf, argsize))
844 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
846 void __user *p = (void __user *)arg;
851 if (copy_from_user(args, p, 7))
854 memset(&task, 0, sizeof(task));
855 memcpy(&task.tf_array[7], &args[1], 6);
856 task.tf.command = args[0];
857 task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
859 err = ide_no_data_taskfile(drive, &task);
861 args[0] = task.tf.command;
862 memcpy(&args[1], &task.tf_array[7], 6);
864 if (copy_to_user(p, args, 7))