2 * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
3 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
4 * Copyright (C) 2001-2002 Klaus Smolin
5 * IBM Storage Technology Division
6 * Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz
8 * The big the bad and the ugly.
11 #include <linux/types.h>
12 #include <linux/string.h>
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/interrupt.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/hdreg.h>
20 #include <linux/ide.h>
21 #include <linux/scatterlist.h>
23 #include <asm/uaccess.h>
26 void ide_tf_dump(const char *s
, struct ide_taskfile
*tf
)
29 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
30 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
31 s
, tf
->feature
, tf
->nsect
, tf
->lbal
,
32 tf
->lbam
, tf
->lbah
, tf
->device
, tf
->command
);
33 printk("%s: hob: nsect 0x%02x lbal 0x%02x "
34 "lbam 0x%02x lbah 0x%02x\n",
35 s
, tf
->hob_nsect
, tf
->hob_lbal
,
36 tf
->hob_lbam
, tf
->hob_lbah
);
40 int taskfile_lib_get_identify (ide_drive_t
*drive
, u8
*buf
)
44 memset(&cmd
, 0, sizeof(cmd
));
46 if (drive
->media
== ide_disk
)
47 cmd
.tf
.command
= ATA_CMD_ID_ATA
;
49 cmd
.tf
.command
= ATA_CMD_ID_ATAPI
;
50 cmd
.tf_flags
= IDE_TFLAG_TF
| IDE_TFLAG_DEVICE
;
51 cmd
.protocol
= ATA_PROT_PIO
;
53 return ide_raw_taskfile(drive
, &cmd
, buf
, 1);
56 static ide_startstop_t
task_no_data_intr(ide_drive_t
*);
57 static ide_startstop_t
pre_task_out_intr(ide_drive_t
*, struct ide_cmd
*);
58 static ide_startstop_t
task_in_intr(ide_drive_t
*);
60 ide_startstop_t
do_rw_taskfile(ide_drive_t
*drive
, struct ide_cmd
*orig_cmd
)
62 ide_hwif_t
*hwif
= drive
->hwif
;
63 struct ide_cmd
*cmd
= &hwif
->cmd
;
64 struct ide_taskfile
*tf
= &cmd
->tf
;
65 ide_handler_t
*handler
= NULL
;
66 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
67 const struct ide_dma_ops
*dma_ops
= hwif
->dma_ops
;
69 if (orig_cmd
->protocol
== ATA_PROT_PIO
&&
70 (orig_cmd
->tf_flags
& IDE_TFLAG_MULTI_PIO
) &&
71 drive
->mult_count
== 0) {
72 printk(KERN_ERR
"%s: multimode not set!\n", drive
->name
);
76 if (orig_cmd
->ftf_flags
& IDE_FTFLAG_FLAGGED
)
77 orig_cmd
->ftf_flags
|= IDE_FTFLAG_SET_IN_FLAGS
;
79 memcpy(cmd
, orig_cmd
, sizeof(*cmd
));
81 if ((cmd
->tf_flags
& IDE_TFLAG_DMA_PIO_FALLBACK
) == 0) {
82 ide_tf_dump(drive
->name
, tf
);
83 tp_ops
->set_irq(hwif
, 1);
84 SELECT_MASK(drive
, 0);
85 tp_ops
->tf_load(drive
, cmd
);
88 switch (cmd
->protocol
) {
90 if (cmd
->tf_flags
& IDE_TFLAG_WRITE
) {
91 tp_ops
->exec_command(hwif
, tf
->command
);
92 ndelay(400); /* FIXME */
93 return pre_task_out_intr(drive
, cmd
);
95 handler
= task_in_intr
;
99 handler
= task_no_data_intr
;
100 ide_execute_command(drive
, tf
->command
, handler
,
101 WAIT_WORSTCASE
, NULL
);
104 if ((drive
->dev_flags
& IDE_DFLAG_USING_DMA
) == 0 ||
105 ide_build_sglist(drive
, hwif
->rq
) == 0 ||
106 dma_ops
->dma_setup(drive
))
108 dma_ops
->dma_exec_cmd(drive
, tf
->command
);
109 dma_ops
->dma_start(drive
);
113 EXPORT_SYMBOL_GPL(do_rw_taskfile
);
115 static ide_startstop_t
task_no_data_intr(ide_drive_t
*drive
)
117 ide_hwif_t
*hwif
= drive
->hwif
;
118 struct ide_cmd
*cmd
= &hwif
->cmd
;
119 struct ide_taskfile
*tf
= &cmd
->tf
;
120 int custom
= (cmd
->tf_flags
& IDE_TFLAG_CUSTOM_HANDLER
) ? 1 : 0;
121 int retries
= (custom
&& tf
->command
== ATA_CMD_INIT_DEV_PARAMS
) ? 5 : 1;
124 local_irq_enable_in_hardirq();
127 stat
= hwif
->tp_ops
->read_status(hwif
);
128 if ((stat
& ATA_BUSY
) == 0 || retries
-- == 0)
133 if (!OK_STAT(stat
, ATA_DRDY
, BAD_STAT
)) {
134 if (custom
&& tf
->command
== ATA_CMD_SET_MULTI
) {
135 drive
->mult_req
= drive
->mult_count
= 0;
136 drive
->special
.b
.recalibrate
= 1;
137 (void)ide_dump_status(drive
, __func__
, stat
);
139 } else if (custom
&& tf
->command
== ATA_CMD_INIT_DEV_PARAMS
) {
140 if ((stat
& (ATA_ERR
| ATA_DRQ
)) == 0) {
141 ide_set_handler(drive
, &task_no_data_intr
,
142 WAIT_WORSTCASE
, NULL
);
146 return ide_error(drive
, "task_no_data_intr", stat
);
149 if (custom
&& tf
->command
== ATA_CMD_IDLEIMMEDIATE
) {
150 hwif
->tp_ops
->tf_read(drive
, cmd
);
151 if (tf
->lbal
!= 0xc4) {
152 printk(KERN_ERR
"%s: head unload failed!\n",
154 ide_tf_dump(drive
->name
, tf
);
156 drive
->dev_flags
|= IDE_DFLAG_PARKED
;
157 } else if (custom
&& tf
->command
== ATA_CMD_SET_MULTI
)
158 drive
->mult_count
= drive
->mult_req
;
160 if (custom
== 0 || tf
->command
== ATA_CMD_IDLEIMMEDIATE
) {
161 struct request
*rq
= hwif
->rq
;
162 u8 err
= ide_read_error(drive
);
164 if (blk_pm_request(rq
))
165 ide_complete_pm_rq(drive
, rq
);
167 if (rq
->cmd_type
== REQ_TYPE_ATA_TASKFILE
)
168 ide_complete_cmd(drive
, cmd
, stat
, err
);
169 ide_complete_rq(drive
, err
);
176 static u8
wait_drive_not_busy(ide_drive_t
*drive
)
178 ide_hwif_t
*hwif
= drive
->hwif
;
183 * Last sector was transfered, wait until device is ready. This can
184 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
186 for (retries
= 0; retries
< 1000; retries
++) {
187 stat
= hwif
->tp_ops
->read_status(hwif
);
196 printk(KERN_ERR
"%s: drive still BUSY!\n", drive
->name
);
201 static void ide_pio_sector(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
204 ide_hwif_t
*hwif
= drive
->hwif
;
205 struct scatterlist
*sg
= hwif
->sg_table
;
206 struct scatterlist
*cursg
= cmd
->cursg
;
208 #ifdef CONFIG_HIGHMEM
220 page
= sg_page(cursg
);
221 offset
= cursg
->offset
+ cmd
->cursg_ofs
* SECTOR_SIZE
;
223 /* get the current page and offset */
224 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
227 #ifdef CONFIG_HIGHMEM
228 local_irq_save(flags
);
230 buf
= kmap_atomic(page
, KM_BIO_SRC_IRQ
) + offset
;
235 if ((cmd
->cursg_ofs
* SECTOR_SIZE
) == cursg
->length
) {
236 cmd
->cursg
= sg_next(cmd
->cursg
);
240 /* do the actual data transfer */
242 hwif
->tp_ops
->output_data(drive
, cmd
, buf
, SECTOR_SIZE
);
244 hwif
->tp_ops
->input_data(drive
, cmd
, buf
, SECTOR_SIZE
);
246 kunmap_atomic(buf
, KM_BIO_SRC_IRQ
);
247 #ifdef CONFIG_HIGHMEM
248 local_irq_restore(flags
);
252 static void ide_pio_multi(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
257 nsect
= min_t(unsigned int, cmd
->nleft
, drive
->mult_count
);
259 ide_pio_sector(drive
, cmd
, write
);
262 static void ide_pio_datablock(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
265 u8 saved_io_32bit
= drive
->io_32bit
;
267 if (cmd
->tf_flags
& IDE_TFLAG_FS
)
270 if (cmd
->tf_flags
& IDE_TFLAG_IO_16BIT
)
273 touch_softlockup_watchdog();
275 if (cmd
->tf_flags
& IDE_TFLAG_MULTI_PIO
)
276 ide_pio_multi(drive
, cmd
, write
);
278 ide_pio_sector(drive
, cmd
, write
);
280 drive
->io_32bit
= saved_io_32bit
;
283 static ide_startstop_t
task_error(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
284 const char *s
, u8 stat
)
286 if (cmd
->tf_flags
& IDE_TFLAG_FS
) {
287 int sectors
= cmd
->nsect
- cmd
->nleft
;
289 if (cmd
->protocol
== ATA_PROT_PIO
&&
290 ((cmd
->tf_flags
& IDE_TFLAG_WRITE
) || cmd
->nleft
== 0)) {
291 if (cmd
->tf_flags
& IDE_TFLAG_MULTI_PIO
)
292 sectors
-= drive
->mult_count
;
298 ide_end_request(drive
, 1, sectors
);
300 return ide_error(drive
, s
, stat
);
303 void ide_finish_cmd(ide_drive_t
*drive
, struct ide_cmd
*cmd
, u8 stat
)
305 if ((cmd
->tf_flags
& IDE_TFLAG_FS
) == 0) {
306 u8 err
= ide_read_error(drive
);
308 ide_complete_cmd(drive
, cmd
, stat
, err
);
309 ide_complete_rq(drive
, err
);
313 ide_end_request(drive
, 1, cmd
->rq
->nr_sectors
);
317 * We got an interrupt on a task_in case, but no errors and no DRQ.
319 * It might be a spurious irq (shared irq), but it might be a
320 * command that had no output.
322 static ide_startstop_t
task_in_unexpected(ide_drive_t
*drive
,
323 struct ide_cmd
*cmd
, u8 stat
)
325 /* Command all done? */
326 if (OK_STAT(stat
, ATA_DRDY
, ATA_BUSY
)) {
327 ide_finish_cmd(drive
, cmd
, stat
);
331 /* Assume it was a spurious irq */
332 ide_set_handler(drive
, &task_in_intr
, WAIT_WORSTCASE
, NULL
);
337 * Handler for command with PIO data-in phase (Read/Read Multiple).
339 static ide_startstop_t
task_in_intr(ide_drive_t
*drive
)
341 ide_hwif_t
*hwif
= drive
->hwif
;
342 struct ide_cmd
*cmd
= &drive
->hwif
->cmd
;
343 u8 stat
= hwif
->tp_ops
->read_status(hwif
);
347 return task_error(drive
, cmd
, __func__
, stat
);
349 /* Didn't want any data? Odd. */
350 if ((stat
& ATA_DRQ
) == 0)
351 return task_in_unexpected(drive
, cmd
, stat
);
353 ide_pio_datablock(drive
, cmd
, 0);
355 /* Are we done? Check status and finish transfer. */
356 if (cmd
->nleft
== 0) {
357 stat
= wait_drive_not_busy(drive
);
358 if (!OK_STAT(stat
, 0, BAD_STAT
))
359 return task_error(drive
, cmd
, __func__
, stat
);
360 ide_finish_cmd(drive
, cmd
, stat
);
364 /* Still data left to transfer. */
365 ide_set_handler(drive
, &task_in_intr
, WAIT_WORSTCASE
, NULL
);
371 * Handler for command with PIO data-out phase (Write/Write Multiple).
373 static ide_startstop_t
task_out_intr (ide_drive_t
*drive
)
375 ide_hwif_t
*hwif
= drive
->hwif
;
376 struct ide_cmd
*cmd
= &drive
->hwif
->cmd
;
377 u8 stat
= hwif
->tp_ops
->read_status(hwif
);
379 if (!OK_STAT(stat
, DRIVE_READY
, drive
->bad_wstat
))
380 return task_error(drive
, cmd
, __func__
, stat
);
382 /* Deal with unexpected ATA data phase. */
383 if (((stat
& ATA_DRQ
) == 0) ^ (cmd
->nleft
== 0))
384 return task_error(drive
, cmd
, __func__
, stat
);
386 if (cmd
->nleft
== 0) {
387 ide_finish_cmd(drive
, cmd
, stat
);
391 /* Still data left to transfer. */
392 ide_pio_datablock(drive
, cmd
, 1);
393 ide_set_handler(drive
, &task_out_intr
, WAIT_WORSTCASE
, NULL
);
398 static ide_startstop_t
pre_task_out_intr(ide_drive_t
*drive
,
401 ide_startstop_t startstop
;
403 if (ide_wait_stat(&startstop
, drive
, ATA_DRQ
,
404 drive
->bad_wstat
, WAIT_DRQ
)) {
405 printk(KERN_ERR
"%s: no DRQ after issuing %sWRITE%s\n",
407 (cmd
->tf_flags
& IDE_TFLAG_MULTI_PIO
) ? "MULT" : "",
408 (drive
->dev_flags
& IDE_DFLAG_LBA48
) ? "_EXT" : "");
412 if ((drive
->dev_flags
& IDE_DFLAG_UNMASK
) == 0)
415 ide_set_handler(drive
, &task_out_intr
, WAIT_WORSTCASE
, NULL
);
416 ide_pio_datablock(drive
, cmd
, 1);
421 int ide_raw_taskfile(ide_drive_t
*drive
, struct ide_cmd
*cmd
, u8
*buf
,
427 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
428 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
432 * (ks) We transfer currently only whole sectors.
433 * This is suffient for now. But, it would be great,
434 * if we would find a solution to transfer any size.
435 * To support special commands like READ LONG.
437 rq
->hard_nr_sectors
= rq
->nr_sectors
= nsect
;
438 rq
->hard_cur_sectors
= rq
->current_nr_sectors
= nsect
;
440 if (cmd
->tf_flags
& IDE_TFLAG_WRITE
)
441 rq
->cmd_flags
|= REQ_RW
;
446 error
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
452 EXPORT_SYMBOL(ide_raw_taskfile
);
454 int ide_no_data_taskfile(ide_drive_t
*drive
, struct ide_cmd
*cmd
)
456 cmd
->protocol
= ATA_PROT_NODATA
;
458 return ide_raw_taskfile(drive
, cmd
, NULL
, 0);
460 EXPORT_SYMBOL_GPL(ide_no_data_taskfile
);
462 #ifdef CONFIG_IDE_TASK_IOCTL
463 int ide_taskfile_ioctl(ide_drive_t
*drive
, unsigned long arg
)
465 ide_task_request_t
*req_task
;
471 int tasksize
= sizeof(struct ide_task_request_s
);
472 unsigned int taskin
= 0;
473 unsigned int taskout
= 0;
475 char __user
*buf
= (char __user
*)arg
;
477 // printk("IDE Taskfile ...\n");
479 req_task
= kzalloc(tasksize
, GFP_KERNEL
);
480 if (req_task
== NULL
) return -ENOMEM
;
481 if (copy_from_user(req_task
, buf
, tasksize
)) {
486 taskout
= req_task
->out_size
;
487 taskin
= req_task
->in_size
;
489 if (taskin
> 65536 || taskout
> 65536) {
495 int outtotal
= tasksize
;
496 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
497 if (outbuf
== NULL
) {
501 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
508 int intotal
= tasksize
+ taskout
;
509 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
514 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
520 memset(&cmd
, 0, sizeof(cmd
));
522 memcpy(&cmd
.tf_array
[0], req_task
->hob_ports
,
523 HDIO_DRIVE_HOB_HDR_SIZE
- 2);
524 memcpy(&cmd
.tf_array
[6], req_task
->io_ports
,
525 HDIO_DRIVE_TASK_HDR_SIZE
);
527 cmd
.tf_flags
= IDE_TFLAG_IO_16BIT
| IDE_TFLAG_DEVICE
|
530 if (drive
->dev_flags
& IDE_DFLAG_LBA48
)
531 cmd
.tf_flags
|= (IDE_TFLAG_LBA48
| IDE_TFLAG_IN_HOB
);
533 if (req_task
->out_flags
.all
) {
534 cmd
.ftf_flags
|= IDE_FTFLAG_FLAGGED
;
536 if (req_task
->out_flags
.b
.data
)
537 cmd
.ftf_flags
|= IDE_FTFLAG_OUT_DATA
;
539 if (req_task
->out_flags
.b
.nsector_hob
)
540 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_NSECT
;
541 if (req_task
->out_flags
.b
.sector_hob
)
542 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_LBAL
;
543 if (req_task
->out_flags
.b
.lcyl_hob
)
544 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_LBAM
;
545 if (req_task
->out_flags
.b
.hcyl_hob
)
546 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_LBAH
;
548 if (req_task
->out_flags
.b
.error_feature
)
549 cmd
.tf_flags
|= IDE_TFLAG_OUT_FEATURE
;
550 if (req_task
->out_flags
.b
.nsector
)
551 cmd
.tf_flags
|= IDE_TFLAG_OUT_NSECT
;
552 if (req_task
->out_flags
.b
.sector
)
553 cmd
.tf_flags
|= IDE_TFLAG_OUT_LBAL
;
554 if (req_task
->out_flags
.b
.lcyl
)
555 cmd
.tf_flags
|= IDE_TFLAG_OUT_LBAM
;
556 if (req_task
->out_flags
.b
.hcyl
)
557 cmd
.tf_flags
|= IDE_TFLAG_OUT_LBAH
;
559 cmd
.tf_flags
|= IDE_TFLAG_OUT_TF
;
560 if (cmd
.tf_flags
& IDE_TFLAG_LBA48
)
561 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB
;
564 if (req_task
->in_flags
.b
.data
)
565 cmd
.ftf_flags
|= IDE_FTFLAG_IN_DATA
;
567 if (req_task
->req_cmd
== IDE_DRIVE_TASK_RAW_WRITE
) {
568 /* fixup data phase if needed */
569 if (req_task
->data_phase
== TASKFILE_IN_DMAQ
||
570 req_task
->data_phase
== TASKFILE_IN_DMA
)
571 cmd
.tf_flags
|= IDE_TFLAG_WRITE
;
574 cmd
.protocol
= ATA_PROT_DMA
;
576 switch (req_task
->data_phase
) {
577 case TASKFILE_MULTI_OUT
:
578 if (!drive
->mult_count
) {
579 /* (hs): give up if multcount is not set */
580 printk(KERN_ERR
"%s: %s Multimode Write " \
581 "multcount is not set\n",
582 drive
->name
, __func__
);
586 cmd
.tf_flags
|= IDE_TFLAG_MULTI_PIO
;
589 cmd
.protocol
= ATA_PROT_PIO
;
591 case TASKFILE_OUT_DMAQ
:
592 case TASKFILE_OUT_DMA
:
593 cmd
.tf_flags
|= IDE_TFLAG_WRITE
;
594 nsect
= taskout
/ SECTOR_SIZE
;
597 case TASKFILE_MULTI_IN
:
598 if (!drive
->mult_count
) {
599 /* (hs): give up if multcount is not set */
600 printk(KERN_ERR
"%s: %s Multimode Read failure " \
601 "multcount is not set\n",
602 drive
->name
, __func__
);
606 cmd
.tf_flags
|= IDE_TFLAG_MULTI_PIO
;
609 cmd
.protocol
= ATA_PROT_PIO
;
611 case TASKFILE_IN_DMAQ
:
612 case TASKFILE_IN_DMA
:
613 nsect
= taskin
/ SECTOR_SIZE
;
616 case TASKFILE_NO_DATA
:
617 cmd
.protocol
= ATA_PROT_NODATA
;
624 if (req_task
->req_cmd
== IDE_DRIVE_TASK_NO_DATA
)
627 nsect
= (cmd
.tf
.hob_nsect
<< 8) | cmd
.tf
.nsect
;
630 printk(KERN_ERR
"%s: in/out command without data\n",
637 err
= ide_raw_taskfile(drive
, &cmd
, data_buf
, nsect
);
639 memcpy(req_task
->hob_ports
, &cmd
.tf_array
[0],
640 HDIO_DRIVE_HOB_HDR_SIZE
- 2);
641 memcpy(req_task
->io_ports
, &cmd
.tf_array
[6],
642 HDIO_DRIVE_TASK_HDR_SIZE
);
644 if ((cmd
.ftf_flags
& IDE_FTFLAG_SET_IN_FLAGS
) &&
645 req_task
->in_flags
.all
== 0) {
646 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
647 if (drive
->dev_flags
& IDE_DFLAG_LBA48
)
648 req_task
->in_flags
.all
|= (IDE_HOB_STD_IN_FLAGS
<< 8);
651 if (copy_to_user(buf
, req_task
, tasksize
)) {
656 int outtotal
= tasksize
;
657 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
663 int intotal
= tasksize
+ taskout
;
664 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
674 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);