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 EXPORT_SYMBOL_GPL(ide_tf_load);
119 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
123 memset(&args, 0, sizeof(ide_task_t));
124 args.tf.nsect = 0x01;
125 if (drive->media == ide_disk)
126 args.tf.command = WIN_IDENTIFY;
128 args.tf.command = WIN_PIDENTIFY;
129 args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
130 args.data_phase = TASKFILE_IN;
131 args.handler = task_in_intr;
132 return ide_raw_taskfile(drive, &args, buf, 1);
135 static int inline task_dma_ok(ide_task_t *task)
137 if (task->tf_flags & IDE_TFLAG_FLAGGED)
140 switch (task->tf.command) {
141 case WIN_WRITEDMA_ONCE:
143 case WIN_WRITEDMA_EXT:
144 case WIN_READDMA_ONCE:
146 case WIN_READDMA_EXT:
147 case WIN_IDENTIFY_DMA:
154 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
156 ide_hwif_t *hwif = HWIF(drive);
157 struct ide_taskfile *tf = &task->tf;
159 if (task->data_phase == TASKFILE_MULTI_IN ||
160 task->data_phase == TASKFILE_MULTI_OUT) {
161 if (!drive->mult_count) {
162 printk(KERN_ERR "%s: multimode not set!\n",
168 if (task->tf_flags & IDE_TFLAG_FLAGGED)
169 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
171 ide_tf_load(drive, task);
173 if (task->handler != NULL) {
174 if (task->prehandler != NULL) {
175 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
176 ndelay(400); /* FIXME */
177 return task->prehandler(drive, task->rq);
179 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
183 if (task_dma_ok(task) && drive->using_dma && !hwif->dma_setup(drive)) {
184 hwif->dma_exec_cmd(drive, tf->command);
185 hwif->dma_start(drive);
193 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
195 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
197 ide_hwif_t *hwif = HWIF(drive);
200 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
201 drive->mult_count = drive->mult_req;
203 drive->mult_req = drive->mult_count = 0;
204 drive->special.b.recalibrate = 1;
205 (void) ide_dump_status(drive, "set_multmode", stat);
211 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
213 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
215 ide_hwif_t *hwif = HWIF(drive);
219 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
222 if (OK_STAT(stat, READY_STAT, BAD_STAT))
225 if (stat & (ERR_STAT|DRQ_STAT))
226 return ide_error(drive, "set_geometry_intr", stat);
228 BUG_ON(HWGROUP(drive)->handler != NULL);
229 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
234 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
236 ide_startstop_t recal_intr (ide_drive_t *drive)
238 ide_hwif_t *hwif = HWIF(drive);
241 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
242 return ide_error(drive, "recal_intr", stat);
247 * Handler for commands without a data phase
249 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
251 ide_task_t *args = HWGROUP(drive)->rq->special;
252 ide_hwif_t *hwif = HWIF(drive);
255 local_irq_enable_in_hardirq();
256 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
257 return ide_error(drive, "task_no_data_intr", stat);
258 /* calls ide_end_drive_cmd */
261 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
266 static u8 wait_drive_not_busy(ide_drive_t *drive)
268 ide_hwif_t *hwif = HWIF(drive);
273 * Last sector was transfered, wait until drive is ready.
274 * This can take up to 10 usec, but we will wait max 1 ms
275 * (drive_cmd_intr() waits that long).
277 for (retries = 0; retries < 100; retries++) {
278 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
284 if (stat & BUSY_STAT)
285 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
290 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
292 ide_hwif_t *hwif = drive->hwif;
293 struct scatterlist *sg = hwif->sg_table;
294 struct scatterlist *cursg = hwif->cursg;
296 #ifdef CONFIG_HIGHMEM
308 page = sg_page(cursg);
309 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
311 /* get the current page and offset */
312 page = nth_page(page, (offset >> PAGE_SHIFT));
315 #ifdef CONFIG_HIGHMEM
316 local_irq_save(flags);
318 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
323 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
324 hwif->cursg = sg_next(hwif->cursg);
328 /* do the actual data transfer */
330 taskfile_output_data(drive, buf, SECTOR_WORDS);
332 taskfile_input_data(drive, buf, SECTOR_WORDS);
334 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
335 #ifdef CONFIG_HIGHMEM
336 local_irq_restore(flags);
340 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
344 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
346 ide_pio_sector(drive, write);
349 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
352 if (rq->bio) /* fs request */
355 touch_softlockup_watchdog();
357 switch (drive->hwif->data_phase) {
358 case TASKFILE_MULTI_IN:
359 case TASKFILE_MULTI_OUT:
360 ide_pio_multi(drive, write);
363 ide_pio_sector(drive, write);
368 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
369 const char *s, u8 stat)
372 ide_hwif_t *hwif = drive->hwif;
373 int sectors = hwif->nsect - hwif->nleft;
375 switch (hwif->data_phase) {
383 case TASKFILE_MULTI_IN:
387 case TASKFILE_MULTI_OUT:
388 sectors -= drive->mult_count;
396 drv = *(ide_driver_t **)rq->rq_disk->private_data;
397 drv->end_request(drive, 1, sectors);
400 return ide_error(drive, s, stat);
403 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
405 HWIF(drive)->cursg = NULL;
407 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
408 ide_task_t *task = rq->special;
410 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
411 u8 err = drive->hwif->INB(IDE_ERROR_REG);
412 ide_end_drive_cmd(drive, stat, err);
420 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
421 drv->end_request(drive, 1, rq->hard_nr_sectors);
423 ide_end_request(drive, 1, rq->hard_nr_sectors);
427 * Handler for command with PIO data-in phase (Read/Read Multiple).
429 ide_startstop_t task_in_intr (ide_drive_t *drive)
431 ide_hwif_t *hwif = drive->hwif;
432 struct request *rq = HWGROUP(drive)->rq;
433 u8 stat = hwif->INB(IDE_STATUS_REG);
435 /* new way for dealing with premature shared PCI interrupts */
436 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
437 if (stat & (ERR_STAT | DRQ_STAT))
438 return task_error(drive, rq, __FUNCTION__, stat);
439 /* No data yet, so wait for another IRQ. */
440 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
444 ide_pio_datablock(drive, rq, 0);
446 /* If it was the last datablock check status and finish transfer. */
448 stat = wait_drive_not_busy(drive);
449 if (!OK_STAT(stat, 0, BAD_R_STAT))
450 return task_error(drive, rq, __FUNCTION__, stat);
451 task_end_request(drive, rq, stat);
455 /* Still data left to transfer. */
456 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
460 EXPORT_SYMBOL(task_in_intr);
463 * Handler for command with PIO data-out phase (Write/Write Multiple).
465 static ide_startstop_t task_out_intr (ide_drive_t *drive)
467 ide_hwif_t *hwif = drive->hwif;
468 struct request *rq = HWGROUP(drive)->rq;
469 u8 stat = hwif->INB(IDE_STATUS_REG);
471 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
472 return task_error(drive, rq, __FUNCTION__, stat);
474 /* Deal with unexpected ATA data phase. */
475 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
476 return task_error(drive, rq, __FUNCTION__, stat);
479 task_end_request(drive, rq, stat);
483 /* Still data left to transfer. */
484 ide_pio_datablock(drive, rq, 1);
485 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
490 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
492 ide_startstop_t startstop;
494 if (ide_wait_stat(&startstop, drive, DATA_READY,
495 drive->bad_wstat, WAIT_DRQ)) {
496 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
498 drive->hwif->data_phase ? "MULT" : "",
499 drive->addressing ? "_EXT" : "");
506 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
507 ide_pio_datablock(drive, rq, 1);
511 EXPORT_SYMBOL(pre_task_out_intr);
513 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
517 memset(&rq, 0, sizeof(rq));
519 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
523 * (ks) We transfer currently only whole sectors.
524 * This is suffient for now. But, it would be great,
525 * if we would find a solution to transfer any size.
526 * To support special commands like READ LONG.
528 rq.hard_nr_sectors = rq.nr_sectors = nsect;
529 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
531 if (task->tf_flags & IDE_TFLAG_WRITE)
532 rq.cmd_flags |= REQ_RW;
537 return ide_do_drive_cmd(drive, &rq, ide_wait);
540 EXPORT_SYMBOL(ide_raw_taskfile);
542 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
544 task->data_phase = TASKFILE_NO_DATA;
545 task->handler = task_no_data_intr;
547 return ide_raw_taskfile(drive, task, NULL, 0);
549 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
551 #ifdef CONFIG_IDE_TASK_IOCTL
552 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
554 ide_task_request_t *req_task;
560 int tasksize = sizeof(struct ide_task_request_s);
561 unsigned int taskin = 0;
562 unsigned int taskout = 0;
564 u8 io_32bit = drive->io_32bit;
565 char __user *buf = (char __user *)arg;
567 // printk("IDE Taskfile ...\n");
569 req_task = kzalloc(tasksize, GFP_KERNEL);
570 if (req_task == NULL) return -ENOMEM;
571 if (copy_from_user(req_task, buf, tasksize)) {
576 taskout = req_task->out_size;
577 taskin = req_task->in_size;
579 if (taskin > 65536 || taskout > 65536) {
585 int outtotal = tasksize;
586 outbuf = kzalloc(taskout, GFP_KERNEL);
587 if (outbuf == NULL) {
591 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
598 int intotal = tasksize + taskout;
599 inbuf = kzalloc(taskin, GFP_KERNEL);
604 if (copy_from_user(inbuf, buf + intotal, taskin)) {
610 memset(&args, 0, sizeof(ide_task_t));
612 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
613 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
615 args.data_phase = req_task->data_phase;
617 args.tf_flags = IDE_TFLAG_OUT_DEVICE;
618 if (drive->addressing == 1)
619 args.tf_flags |= IDE_TFLAG_LBA48;
621 if (req_task->out_flags.all) {
622 args.tf_flags |= IDE_TFLAG_FLAGGED;
624 if (req_task->out_flags.b.data)
625 args.tf_flags |= IDE_TFLAG_OUT_DATA;
627 if (req_task->out_flags.b.nsector_hob)
628 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
629 if (req_task->out_flags.b.sector_hob)
630 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
631 if (req_task->out_flags.b.lcyl_hob)
632 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
633 if (req_task->out_flags.b.hcyl_hob)
634 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
636 if (req_task->out_flags.b.error_feature)
637 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
638 if (req_task->out_flags.b.nsector)
639 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
640 if (req_task->out_flags.b.sector)
641 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
642 if (req_task->out_flags.b.lcyl)
643 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
644 if (req_task->out_flags.b.hcyl)
645 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
647 args.tf_flags |= IDE_TFLAG_OUT_TF;
648 if (args.tf_flags & IDE_TFLAG_LBA48)
649 args.tf_flags |= IDE_TFLAG_OUT_HOB;
652 if (req_task->in_flags.b.data)
653 args.tf_flags |= IDE_TFLAG_IN_DATA;
656 switch(req_task->data_phase) {
657 case TASKFILE_MULTI_OUT:
658 if (!drive->mult_count) {
659 /* (hs): give up if multcount is not set */
660 printk(KERN_ERR "%s: %s Multimode Write " \
661 "multcount is not set\n",
662 drive->name, __FUNCTION__);
668 args.prehandler = &pre_task_out_intr;
669 args.handler = &task_out_intr;
671 case TASKFILE_OUT_DMAQ:
672 case TASKFILE_OUT_DMA:
673 nsect = taskout / SECTOR_SIZE;
676 case TASKFILE_MULTI_IN:
677 if (!drive->mult_count) {
678 /* (hs): give up if multcount is not set */
679 printk(KERN_ERR "%s: %s Multimode Read failure " \
680 "multcount is not set\n",
681 drive->name, __FUNCTION__);
687 args.handler = &task_in_intr;
689 case TASKFILE_IN_DMAQ:
690 case TASKFILE_IN_DMA:
691 nsect = taskin / SECTOR_SIZE;
694 case TASKFILE_NO_DATA:
695 args.handler = &task_no_data_intr;
702 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
705 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
708 printk(KERN_ERR "%s: in/out command without data\n",
715 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
716 args.tf_flags |= IDE_TFLAG_WRITE;
718 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
720 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
721 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
723 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
724 req_task->in_flags.all == 0) {
725 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
726 if (drive->addressing == 1)
727 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
730 if (copy_to_user(buf, req_task, tasksize)) {
735 int outtotal = tasksize;
736 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
742 int intotal = tasksize + taskout;
743 if (copy_to_user(buf + intotal, inbuf, taskin)) {
753 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
755 drive->io_32bit = io_32bit;
761 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
768 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
769 ide_init_drive_cmd(&rq);
775 return ide_do_drive_cmd(drive, &rq, ide_wait);
778 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
781 u8 args[4], *argbuf = args;
785 struct ide_taskfile *tf = &tfargs.tf;
787 if (NULL == (void *) arg) {
789 ide_init_drive_cmd(&rq);
790 return ide_do_drive_cmd(drive, &rq, ide_wait);
793 if (copy_from_user(args, (void __user *)arg, 4))
796 memset(&tfargs, 0, sizeof(ide_task_t));
797 tf->feature = args[2];
800 tf->command = args[0];
803 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
804 argbuf = kzalloc(argsize, GFP_KERNEL);
808 if (set_transfer(drive, &tfargs)) {
810 if (ide_ata66_check(drive, &tfargs))
814 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
816 if (!err && xfer_rate) {
817 /* active-retuning-calls future */
818 ide_set_xfer_rate(drive, xfer_rate);
819 ide_driveid_update(drive);
822 if (copy_to_user((void __user *)arg, argbuf, argsize))
829 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
831 void __user *p = (void __user *)arg;
836 if (copy_from_user(args, p, 7))
839 memset(&task, 0, sizeof(task));
840 memcpy(&task.tf_array[7], &args[1], 6);
841 task.tf.command = args[0];
842 task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
844 err = ide_no_data_taskfile(drive, &task);
846 args[0] = task.tf.command;
847 memcpy(&args[1], &task.tf_array[7], 6);
849 if (copy_to_user(p, args, 7))