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 switch (task->data_phase) {
174 case TASKFILE_MULTI_OUT:
176 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
177 ndelay(400); /* FIXME */
178 return pre_task_out_intr(drive, task->rq);
179 case TASKFILE_MULTI_IN:
181 case TASKFILE_NO_DATA:
182 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
185 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
186 hwif->dma_setup(drive))
188 hwif->dma_exec_cmd(drive, tf->command);
189 hwif->dma_start(drive);
195 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
197 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
199 ide_hwif_t *hwif = HWIF(drive);
202 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
203 drive->mult_count = drive->mult_req;
205 drive->mult_req = drive->mult_count = 0;
206 drive->special.b.recalibrate = 1;
207 (void) ide_dump_status(drive, "set_multmode", stat);
213 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
215 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
217 ide_hwif_t *hwif = HWIF(drive);
221 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
224 if (OK_STAT(stat, READY_STAT, BAD_STAT))
227 if (stat & (ERR_STAT|DRQ_STAT))
228 return ide_error(drive, "set_geometry_intr", stat);
230 BUG_ON(HWGROUP(drive)->handler != NULL);
231 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
236 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
238 ide_startstop_t recal_intr (ide_drive_t *drive)
240 ide_hwif_t *hwif = HWIF(drive);
243 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
244 return ide_error(drive, "recal_intr", stat);
249 * Handler for commands without a data phase
251 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
253 ide_task_t *args = HWGROUP(drive)->rq->special;
254 ide_hwif_t *hwif = HWIF(drive);
257 local_irq_enable_in_hardirq();
258 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
259 return ide_error(drive, "task_no_data_intr", stat);
260 /* calls ide_end_drive_cmd */
263 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
268 static u8 wait_drive_not_busy(ide_drive_t *drive)
270 ide_hwif_t *hwif = HWIF(drive);
275 * Last sector was transfered, wait until drive is ready.
276 * This can take up to 10 usec, but we will wait max 1 ms
277 * (drive_cmd_intr() waits that long).
279 for (retries = 0; retries < 100; retries++) {
280 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
286 if (stat & BUSY_STAT)
287 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
292 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
294 ide_hwif_t *hwif = drive->hwif;
295 struct scatterlist *sg = hwif->sg_table;
296 struct scatterlist *cursg = hwif->cursg;
298 #ifdef CONFIG_HIGHMEM
310 page = sg_page(cursg);
311 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
313 /* get the current page and offset */
314 page = nth_page(page, (offset >> PAGE_SHIFT));
317 #ifdef CONFIG_HIGHMEM
318 local_irq_save(flags);
320 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
325 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
326 hwif->cursg = sg_next(hwif->cursg);
330 /* do the actual data transfer */
332 taskfile_output_data(drive, buf, SECTOR_WORDS);
334 taskfile_input_data(drive, buf, SECTOR_WORDS);
336 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
337 #ifdef CONFIG_HIGHMEM
338 local_irq_restore(flags);
342 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
346 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
348 ide_pio_sector(drive, write);
351 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
354 if (rq->bio) /* fs request */
357 touch_softlockup_watchdog();
359 switch (drive->hwif->data_phase) {
360 case TASKFILE_MULTI_IN:
361 case TASKFILE_MULTI_OUT:
362 ide_pio_multi(drive, write);
365 ide_pio_sector(drive, write);
370 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
371 const char *s, u8 stat)
374 ide_hwif_t *hwif = drive->hwif;
375 int sectors = hwif->nsect - hwif->nleft;
377 switch (hwif->data_phase) {
385 case TASKFILE_MULTI_IN:
389 case TASKFILE_MULTI_OUT:
390 sectors -= drive->mult_count;
398 drv = *(ide_driver_t **)rq->rq_disk->private_data;
399 drv->end_request(drive, 1, sectors);
402 return ide_error(drive, s, stat);
405 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
407 HWIF(drive)->cursg = NULL;
409 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
410 ide_task_t *task = rq->special;
412 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
413 u8 err = drive->hwif->INB(IDE_ERROR_REG);
414 ide_end_drive_cmd(drive, stat, err);
422 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
423 drv->end_request(drive, 1, rq->hard_nr_sectors);
425 ide_end_request(drive, 1, rq->hard_nr_sectors);
429 * Handler for command with PIO data-in phase (Read/Read Multiple).
431 ide_startstop_t task_in_intr (ide_drive_t *drive)
433 ide_hwif_t *hwif = drive->hwif;
434 struct request *rq = HWGROUP(drive)->rq;
435 u8 stat = hwif->INB(IDE_STATUS_REG);
437 /* new way for dealing with premature shared PCI interrupts */
438 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
439 if (stat & (ERR_STAT | DRQ_STAT))
440 return task_error(drive, rq, __FUNCTION__, stat);
441 /* No data yet, so wait for another IRQ. */
442 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
446 ide_pio_datablock(drive, rq, 0);
448 /* If it was the last datablock check status and finish transfer. */
450 stat = wait_drive_not_busy(drive);
451 if (!OK_STAT(stat, 0, BAD_R_STAT))
452 return task_error(drive, rq, __FUNCTION__, stat);
453 task_end_request(drive, rq, stat);
457 /* Still data left to transfer. */
458 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
462 EXPORT_SYMBOL(task_in_intr);
465 * Handler for command with PIO data-out phase (Write/Write Multiple).
467 static ide_startstop_t task_out_intr (ide_drive_t *drive)
469 ide_hwif_t *hwif = drive->hwif;
470 struct request *rq = HWGROUP(drive)->rq;
471 u8 stat = hwif->INB(IDE_STATUS_REG);
473 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
474 return task_error(drive, rq, __FUNCTION__, stat);
476 /* Deal with unexpected ATA data phase. */
477 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
478 return task_error(drive, rq, __FUNCTION__, stat);
481 task_end_request(drive, rq, stat);
485 /* Still data left to transfer. */
486 ide_pio_datablock(drive, rq, 1);
487 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
492 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
494 ide_startstop_t startstop;
496 if (ide_wait_stat(&startstop, drive, DATA_READY,
497 drive->bad_wstat, WAIT_DRQ)) {
498 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
500 drive->hwif->data_phase ? "MULT" : "",
501 drive->addressing ? "_EXT" : "");
508 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
509 ide_pio_datablock(drive, rq, 1);
513 EXPORT_SYMBOL(pre_task_out_intr);
515 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
519 memset(&rq, 0, sizeof(rq));
521 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
525 * (ks) We transfer currently only whole sectors.
526 * This is suffient for now. But, it would be great,
527 * if we would find a solution to transfer any size.
528 * To support special commands like READ LONG.
530 rq.hard_nr_sectors = rq.nr_sectors = nsect;
531 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
533 if (task->tf_flags & IDE_TFLAG_WRITE)
534 rq.cmd_flags |= REQ_RW;
539 return ide_do_drive_cmd(drive, &rq, ide_wait);
542 EXPORT_SYMBOL(ide_raw_taskfile);
544 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
546 task->data_phase = TASKFILE_NO_DATA;
547 task->handler = task_no_data_intr;
549 return ide_raw_taskfile(drive, task, NULL, 0);
551 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
553 #ifdef CONFIG_IDE_TASK_IOCTL
554 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
556 ide_task_request_t *req_task;
562 int tasksize = sizeof(struct ide_task_request_s);
563 unsigned int taskin = 0;
564 unsigned int taskout = 0;
566 u8 io_32bit = drive->io_32bit;
567 char __user *buf = (char __user *)arg;
569 // printk("IDE Taskfile ...\n");
571 req_task = kzalloc(tasksize, GFP_KERNEL);
572 if (req_task == NULL) return -ENOMEM;
573 if (copy_from_user(req_task, buf, tasksize)) {
578 taskout = req_task->out_size;
579 taskin = req_task->in_size;
581 if (taskin > 65536 || taskout > 65536) {
587 int outtotal = tasksize;
588 outbuf = kzalloc(taskout, GFP_KERNEL);
589 if (outbuf == NULL) {
593 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
600 int intotal = tasksize + taskout;
601 inbuf = kzalloc(taskin, GFP_KERNEL);
606 if (copy_from_user(inbuf, buf + intotal, taskin)) {
612 memset(&args, 0, sizeof(ide_task_t));
614 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
615 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
617 args.data_phase = req_task->data_phase;
619 args.tf_flags = IDE_TFLAG_OUT_DEVICE;
620 if (drive->addressing == 1)
621 args.tf_flags |= IDE_TFLAG_LBA48;
623 if (req_task->out_flags.all) {
624 args.tf_flags |= IDE_TFLAG_FLAGGED;
626 if (req_task->out_flags.b.data)
627 args.tf_flags |= IDE_TFLAG_OUT_DATA;
629 if (req_task->out_flags.b.nsector_hob)
630 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
631 if (req_task->out_flags.b.sector_hob)
632 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
633 if (req_task->out_flags.b.lcyl_hob)
634 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
635 if (req_task->out_flags.b.hcyl_hob)
636 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
638 if (req_task->out_flags.b.error_feature)
639 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
640 if (req_task->out_flags.b.nsector)
641 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
642 if (req_task->out_flags.b.sector)
643 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
644 if (req_task->out_flags.b.lcyl)
645 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
646 if (req_task->out_flags.b.hcyl)
647 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
649 args.tf_flags |= IDE_TFLAG_OUT_TF;
650 if (args.tf_flags & IDE_TFLAG_LBA48)
651 args.tf_flags |= IDE_TFLAG_OUT_HOB;
654 if (req_task->in_flags.b.data)
655 args.tf_flags |= IDE_TFLAG_IN_DATA;
658 switch(req_task->data_phase) {
659 case TASKFILE_MULTI_OUT:
660 if (!drive->mult_count) {
661 /* (hs): give up if multcount is not set */
662 printk(KERN_ERR "%s: %s Multimode Write " \
663 "multcount is not set\n",
664 drive->name, __FUNCTION__);
670 args.handler = &task_out_intr;
672 case TASKFILE_OUT_DMAQ:
673 case TASKFILE_OUT_DMA:
674 nsect = taskout / SECTOR_SIZE;
677 case TASKFILE_MULTI_IN:
678 if (!drive->mult_count) {
679 /* (hs): give up if multcount is not set */
680 printk(KERN_ERR "%s: %s Multimode Read failure " \
681 "multcount is not set\n",
682 drive->name, __FUNCTION__);
688 args.handler = &task_in_intr;
690 case TASKFILE_IN_DMAQ:
691 case TASKFILE_IN_DMA:
692 nsect = taskin / SECTOR_SIZE;
695 case TASKFILE_NO_DATA:
696 args.handler = &task_no_data_intr;
703 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
706 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
709 printk(KERN_ERR "%s: in/out command without data\n",
716 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
717 args.tf_flags |= IDE_TFLAG_WRITE;
719 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
721 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
722 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
724 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
725 req_task->in_flags.all == 0) {
726 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
727 if (drive->addressing == 1)
728 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
731 if (copy_to_user(buf, req_task, tasksize)) {
736 int outtotal = tasksize;
737 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
743 int intotal = tasksize + taskout;
744 if (copy_to_user(buf + intotal, inbuf, taskin)) {
754 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
756 drive->io_32bit = io_32bit;
762 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
769 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
770 ide_init_drive_cmd(&rq);
776 return ide_do_drive_cmd(drive, &rq, ide_wait);
779 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
782 u8 args[4], *argbuf = args;
786 struct ide_taskfile *tf = &tfargs.tf;
788 if (NULL == (void *) arg) {
790 ide_init_drive_cmd(&rq);
791 return ide_do_drive_cmd(drive, &rq, ide_wait);
794 if (copy_from_user(args, (void __user *)arg, 4))
797 memset(&tfargs, 0, sizeof(ide_task_t));
798 tf->feature = args[2];
801 tf->command = args[0];
804 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
805 argbuf = kzalloc(argsize, GFP_KERNEL);
809 if (set_transfer(drive, &tfargs)) {
811 if (ide_ata66_check(drive, &tfargs))
815 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
817 if (!err && xfer_rate) {
818 /* active-retuning-calls future */
819 ide_set_xfer_rate(drive, xfer_rate);
820 ide_driveid_update(drive);
823 if (copy_to_user((void __user *)arg, argbuf, argsize))
830 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
832 void __user *p = (void __user *)arg;
837 if (copy_from_user(args, p, 7))
840 memset(&task, 0, sizeof(task));
841 memcpy(&task.tf_array[7], &args[1], 6);
842 task.tf.command = args[0];
843 task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
845 err = ide_no_data_taskfile(drive, &task);
847 args[0] = task.tf.command;
848 memcpy(&args[1], &task.tf_array[7], 6);
850 if (copy_to_user(p, args, 7))