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);
80 printk("%s: hob: nsect 0x%02x lbal 0x%02x "
81 "lbam 0x%02x lbah 0x%02x\n",
82 drive->name, tf->hob_nsect, tf->hob_lbal,
83 tf->hob_lbam, tf->hob_lbah);
86 ide_set_irq(drive, 1);
88 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
89 SELECT_MASK(drive, 0);
91 if (task->tf_flags & IDE_TFLAG_OUT_DATA)
92 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
94 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
95 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
96 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
97 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
98 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
99 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
100 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
101 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
102 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
103 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
105 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
106 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
107 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
108 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
109 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
110 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
111 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
112 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
113 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
114 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
116 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
117 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
120 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
124 memset(&args, 0, sizeof(ide_task_t));
125 args.tf.nsect = 0x01;
126 if (drive->media == ide_disk)
127 args.tf.command = WIN_IDENTIFY;
129 args.tf.command = WIN_PIDENTIFY;
130 args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
131 args.data_phase = TASKFILE_IN;
132 return ide_raw_taskfile(drive, &args, buf, 1);
135 static int inline task_dma_ok(ide_task_t *task)
137 if (blk_fs_request(task->rq) || (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 static ide_startstop_t task_no_data_intr(ide_drive_t *);
155 static ide_startstop_t set_geometry_intr(ide_drive_t *);
156 static ide_startstop_t recal_intr(ide_drive_t *);
157 static ide_startstop_t set_multmode_intr(ide_drive_t *);
158 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
159 static ide_startstop_t task_in_intr(ide_drive_t *);
161 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
163 ide_hwif_t *hwif = HWIF(drive);
164 struct ide_taskfile *tf = &task->tf;
165 ide_handler_t *handler = NULL;
167 if (task->data_phase == TASKFILE_MULTI_IN ||
168 task->data_phase == TASKFILE_MULTI_OUT) {
169 if (!drive->mult_count) {
170 printk(KERN_ERR "%s: multimode not set!\n",
176 if (task->tf_flags & IDE_TFLAG_FLAGGED)
177 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
179 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
180 ide_tf_load(drive, task);
182 switch (task->data_phase) {
183 case TASKFILE_MULTI_OUT:
185 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
186 ndelay(400); /* FIXME */
187 return pre_task_out_intr(drive, task->rq);
188 case TASKFILE_MULTI_IN:
190 handler = task_in_intr;
192 case TASKFILE_NO_DATA:
194 handler = task_no_data_intr;
195 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
196 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
197 switch (tf->command) {
198 case WIN_SPECIFY: handler = set_geometry_intr; break;
199 case WIN_RESTORE: handler = recal_intr; break;
200 case WIN_SETMULT: handler = set_multmode_intr; break;
203 ide_execute_command(drive, tf->command, handler,
204 WAIT_WORSTCASE, NULL);
207 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
208 hwif->dma_setup(drive))
210 hwif->dma_exec_cmd(drive, tf->command);
211 hwif->dma_start(drive);
215 EXPORT_SYMBOL_GPL(do_rw_taskfile);
218 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
220 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
222 ide_hwif_t *hwif = HWIF(drive);
225 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
226 drive->mult_count = drive->mult_req;
228 drive->mult_req = drive->mult_count = 0;
229 drive->special.b.recalibrate = 1;
230 (void) ide_dump_status(drive, "set_multmode", stat);
236 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
238 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
240 ide_hwif_t *hwif = HWIF(drive);
244 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
247 if (OK_STAT(stat, READY_STAT, BAD_STAT))
250 if (stat & (ERR_STAT|DRQ_STAT))
251 return ide_error(drive, "set_geometry_intr", stat);
253 BUG_ON(HWGROUP(drive)->handler != NULL);
254 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
259 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
261 static ide_startstop_t recal_intr(ide_drive_t *drive)
263 ide_hwif_t *hwif = HWIF(drive);
266 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
267 return ide_error(drive, "recal_intr", stat);
272 * Handler for commands without a data phase
274 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
276 ide_task_t *args = HWGROUP(drive)->rq->special;
277 ide_hwif_t *hwif = HWIF(drive);
280 local_irq_enable_in_hardirq();
281 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
282 return ide_error(drive, "task_no_data_intr", stat);
283 /* calls ide_end_drive_cmd */
286 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
291 static u8 wait_drive_not_busy(ide_drive_t *drive)
293 ide_hwif_t *hwif = HWIF(drive);
298 * Last sector was transfered, wait until drive is ready.
299 * This can take up to 10 usec, but we will wait max 1 ms
300 * (drive_cmd_intr() waits that long).
302 for (retries = 0; retries < 100; retries++) {
303 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
309 if (stat & BUSY_STAT)
310 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
315 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
317 ide_hwif_t *hwif = drive->hwif;
318 struct scatterlist *sg = hwif->sg_table;
319 struct scatterlist *cursg = hwif->cursg;
321 #ifdef CONFIG_HIGHMEM
333 page = sg_page(cursg);
334 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
336 /* get the current page and offset */
337 page = nth_page(page, (offset >> PAGE_SHIFT));
340 #ifdef CONFIG_HIGHMEM
341 local_irq_save(flags);
343 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
348 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
349 hwif->cursg = sg_next(hwif->cursg);
353 /* do the actual data transfer */
355 taskfile_output_data(drive, buf, SECTOR_WORDS);
357 taskfile_input_data(drive, buf, SECTOR_WORDS);
359 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
360 #ifdef CONFIG_HIGHMEM
361 local_irq_restore(flags);
365 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
369 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
371 ide_pio_sector(drive, write);
374 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
377 if (rq->bio) /* fs request */
380 touch_softlockup_watchdog();
382 switch (drive->hwif->data_phase) {
383 case TASKFILE_MULTI_IN:
384 case TASKFILE_MULTI_OUT:
385 ide_pio_multi(drive, write);
388 ide_pio_sector(drive, write);
393 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
394 const char *s, u8 stat)
397 ide_hwif_t *hwif = drive->hwif;
398 int sectors = hwif->nsect - hwif->nleft;
400 switch (hwif->data_phase) {
408 case TASKFILE_MULTI_IN:
412 case TASKFILE_MULTI_OUT:
413 sectors -= drive->mult_count;
421 drv = *(ide_driver_t **)rq->rq_disk->private_data;
422 drv->end_request(drive, 1, sectors);
425 return ide_error(drive, s, stat);
428 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
430 HWIF(drive)->cursg = NULL;
432 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
433 ide_task_t *task = rq->special;
435 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
436 u8 err = drive->hwif->INB(IDE_ERROR_REG);
437 ide_end_drive_cmd(drive, stat, err);
445 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
446 drv->end_request(drive, 1, rq->hard_nr_sectors);
448 ide_end_request(drive, 1, rq->hard_nr_sectors);
452 * Handler for command with PIO data-in phase (Read/Read Multiple).
454 static ide_startstop_t task_in_intr(ide_drive_t *drive)
456 ide_hwif_t *hwif = drive->hwif;
457 struct request *rq = HWGROUP(drive)->rq;
458 u8 stat = hwif->INB(IDE_STATUS_REG);
460 /* new way for dealing with premature shared PCI interrupts */
461 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
462 if (stat & (ERR_STAT | DRQ_STAT))
463 return task_error(drive, rq, __FUNCTION__, stat);
464 /* No data yet, so wait for another IRQ. */
465 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
469 ide_pio_datablock(drive, rq, 0);
471 /* If it was the last datablock check status and finish transfer. */
473 stat = wait_drive_not_busy(drive);
474 if (!OK_STAT(stat, 0, BAD_R_STAT))
475 return task_error(drive, rq, __FUNCTION__, stat);
476 task_end_request(drive, rq, stat);
480 /* Still data left to transfer. */
481 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
487 * Handler for command with PIO data-out phase (Write/Write Multiple).
489 static ide_startstop_t task_out_intr (ide_drive_t *drive)
491 ide_hwif_t *hwif = drive->hwif;
492 struct request *rq = HWGROUP(drive)->rq;
493 u8 stat = hwif->INB(IDE_STATUS_REG);
495 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
496 return task_error(drive, rq, __FUNCTION__, stat);
498 /* Deal with unexpected ATA data phase. */
499 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
500 return task_error(drive, rq, __FUNCTION__, stat);
503 task_end_request(drive, rq, stat);
507 /* Still data left to transfer. */
508 ide_pio_datablock(drive, rq, 1);
509 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
514 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
516 ide_startstop_t startstop;
518 if (ide_wait_stat(&startstop, drive, DATA_READY,
519 drive->bad_wstat, WAIT_DRQ)) {
520 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
522 drive->hwif->data_phase ? "MULT" : "",
523 drive->addressing ? "_EXT" : "");
530 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
531 ide_pio_datablock(drive, rq, 1);
536 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
540 memset(&rq, 0, sizeof(rq));
542 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
546 * (ks) We transfer currently only whole sectors.
547 * This is suffient for now. But, it would be great,
548 * if we would find a solution to transfer any size.
549 * To support special commands like READ LONG.
551 rq.hard_nr_sectors = rq.nr_sectors = nsect;
552 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
554 if (task->tf_flags & IDE_TFLAG_WRITE)
555 rq.cmd_flags |= REQ_RW;
560 return ide_do_drive_cmd(drive, &rq, ide_wait);
563 EXPORT_SYMBOL(ide_raw_taskfile);
565 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
567 task->data_phase = TASKFILE_NO_DATA;
569 return ide_raw_taskfile(drive, task, NULL, 0);
571 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
573 #ifdef CONFIG_IDE_TASK_IOCTL
574 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
576 ide_task_request_t *req_task;
582 int tasksize = sizeof(struct ide_task_request_s);
583 unsigned int taskin = 0;
584 unsigned int taskout = 0;
586 u8 io_32bit = drive->io_32bit;
587 char __user *buf = (char __user *)arg;
589 // printk("IDE Taskfile ...\n");
591 req_task = kzalloc(tasksize, GFP_KERNEL);
592 if (req_task == NULL) return -ENOMEM;
593 if (copy_from_user(req_task, buf, tasksize)) {
598 taskout = req_task->out_size;
599 taskin = req_task->in_size;
601 if (taskin > 65536 || taskout > 65536) {
607 int outtotal = tasksize;
608 outbuf = kzalloc(taskout, GFP_KERNEL);
609 if (outbuf == NULL) {
613 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
620 int intotal = tasksize + taskout;
621 inbuf = kzalloc(taskin, GFP_KERNEL);
626 if (copy_from_user(inbuf, buf + intotal, taskin)) {
632 memset(&args, 0, sizeof(ide_task_t));
634 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
635 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
637 args.data_phase = req_task->data_phase;
639 args.tf_flags = IDE_TFLAG_OUT_DEVICE;
640 if (drive->addressing == 1)
641 args.tf_flags |= IDE_TFLAG_LBA48;
643 if (req_task->out_flags.all) {
644 args.tf_flags |= IDE_TFLAG_FLAGGED;
646 if (req_task->out_flags.b.data)
647 args.tf_flags |= IDE_TFLAG_OUT_DATA;
649 if (req_task->out_flags.b.nsector_hob)
650 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
651 if (req_task->out_flags.b.sector_hob)
652 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
653 if (req_task->out_flags.b.lcyl_hob)
654 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
655 if (req_task->out_flags.b.hcyl_hob)
656 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
658 if (req_task->out_flags.b.error_feature)
659 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
660 if (req_task->out_flags.b.nsector)
661 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
662 if (req_task->out_flags.b.sector)
663 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
664 if (req_task->out_flags.b.lcyl)
665 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
666 if (req_task->out_flags.b.hcyl)
667 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
669 args.tf_flags |= IDE_TFLAG_OUT_TF;
670 if (args.tf_flags & IDE_TFLAG_LBA48)
671 args.tf_flags |= IDE_TFLAG_OUT_HOB;
674 if (req_task->in_flags.b.data)
675 args.tf_flags |= IDE_TFLAG_IN_DATA;
678 switch(req_task->data_phase) {
679 case TASKFILE_MULTI_OUT:
680 if (!drive->mult_count) {
681 /* (hs): give up if multcount is not set */
682 printk(KERN_ERR "%s: %s Multimode Write " \
683 "multcount is not set\n",
684 drive->name, __FUNCTION__);
691 case TASKFILE_OUT_DMAQ:
692 case TASKFILE_OUT_DMA:
693 nsect = taskout / SECTOR_SIZE;
696 case TASKFILE_MULTI_IN:
697 if (!drive->mult_count) {
698 /* (hs): give up if multcount is not set */
699 printk(KERN_ERR "%s: %s Multimode Read failure " \
700 "multcount is not set\n",
701 drive->name, __FUNCTION__);
708 case TASKFILE_IN_DMAQ:
709 case TASKFILE_IN_DMA:
710 nsect = taskin / SECTOR_SIZE;
713 case TASKFILE_NO_DATA:
720 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
723 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
726 printk(KERN_ERR "%s: in/out command without data\n",
733 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
734 args.tf_flags |= IDE_TFLAG_WRITE;
736 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
738 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
739 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
741 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
742 req_task->in_flags.all == 0) {
743 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
744 if (drive->addressing == 1)
745 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
748 if (copy_to_user(buf, req_task, tasksize)) {
753 int outtotal = tasksize;
754 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
760 int intotal = tasksize + taskout;
761 if (copy_to_user(buf + intotal, inbuf, taskin)) {
771 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);
773 drive->io_32bit = io_32bit;
779 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
786 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
787 ide_init_drive_cmd(&rq);
793 return ide_do_drive_cmd(drive, &rq, ide_wait);
796 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
799 u8 args[4], *argbuf = args;
803 struct ide_taskfile *tf = &tfargs.tf;
805 if (NULL == (void *) arg) {
807 ide_init_drive_cmd(&rq);
808 return ide_do_drive_cmd(drive, &rq, ide_wait);
811 if (copy_from_user(args, (void __user *)arg, 4))
814 memset(&tfargs, 0, sizeof(ide_task_t));
815 tf->feature = args[2];
818 tf->command = args[0];
821 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
822 argbuf = kzalloc(argsize, GFP_KERNEL);
826 if (set_transfer(drive, &tfargs)) {
828 if (ide_ata66_check(drive, &tfargs))
832 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
834 if (!err && xfer_rate) {
835 /* active-retuning-calls future */
836 ide_set_xfer_rate(drive, xfer_rate);
837 ide_driveid_update(drive);
840 if (copy_to_user((void __user *)arg, argbuf, argsize))
847 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
849 void __user *p = (void __user *)arg;
854 if (copy_from_user(args, p, 7))
857 memset(&task, 0, sizeof(task));
858 memcpy(&task.tf_array[7], &args[1], 6);
859 task.tf.command = args[0];
860 task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
862 err = ide_no_data_taskfile(drive, &task);
864 args[0] = task.tf.command;
865 memcpy(&args[1], &task.tf_array[7], 6);
867 if (copy_to_user(p, args, 7))