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
.data_phase
= TASKFILE_IN
;
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
->data_phase
== TASKFILE_MULTI_IN
||
70 orig_cmd
->data_phase
== TASKFILE_MULTI_OUT
) {
71 if (!drive
->mult_count
) {
72 printk(KERN_ERR
"%s: multimode not set!\n",
78 if (orig_cmd
->ftf_flags
& IDE_FTFLAG_FLAGGED
)
79 orig_cmd
->ftf_flags
|= IDE_FTFLAG_SET_IN_FLAGS
;
81 memcpy(cmd
, orig_cmd
, sizeof(*cmd
));
83 if ((cmd
->tf_flags
& IDE_TFLAG_DMA_PIO_FALLBACK
) == 0) {
84 ide_tf_dump(drive
->name
, tf
);
85 tp_ops
->set_irq(hwif
, 1);
86 SELECT_MASK(drive
, 0);
87 tp_ops
->tf_load(drive
, cmd
);
90 switch (cmd
->data_phase
) {
91 case TASKFILE_MULTI_OUT
:
93 tp_ops
->exec_command(hwif
, tf
->command
);
94 ndelay(400); /* FIXME */
95 return pre_task_out_intr(drive
, cmd
);
96 case TASKFILE_MULTI_IN
:
98 handler
= task_in_intr
;
100 case TASKFILE_NO_DATA
:
102 handler
= task_no_data_intr
;
103 ide_execute_command(drive
, tf
->command
, handler
,
104 WAIT_WORSTCASE
, NULL
);
107 if ((drive
->dev_flags
& IDE_DFLAG_USING_DMA
) == 0 ||
108 ide_build_sglist(drive
, hwif
->rq
) == 0 ||
109 dma_ops
->dma_setup(drive
))
111 dma_ops
->dma_exec_cmd(drive
, tf
->command
);
112 dma_ops
->dma_start(drive
);
116 EXPORT_SYMBOL_GPL(do_rw_taskfile
);
119 * Handler for commands without a data phase
121 static ide_startstop_t
task_no_data_intr(ide_drive_t
*drive
)
123 ide_hwif_t
*hwif
= drive
->hwif
;
124 struct ide_cmd
*cmd
= &hwif
->cmd
;
125 struct ide_taskfile
*tf
= &cmd
->tf
;
126 int custom
= (cmd
->tf_flags
& IDE_TFLAG_CUSTOM_HANDLER
) ? 1 : 0;
127 int retries
= (custom
&& tf
->command
== ATA_CMD_INIT_DEV_PARAMS
) ? 5 : 1;
130 local_irq_enable_in_hardirq();
133 stat
= hwif
->tp_ops
->read_status(hwif
);
134 if ((stat
& ATA_BUSY
) == 0 || retries
-- == 0)
139 if (!OK_STAT(stat
, ATA_DRDY
, BAD_STAT
)) {
140 if (custom
&& tf
->command
== ATA_CMD_SET_MULTI
) {
141 drive
->mult_req
= drive
->mult_count
= 0;
142 drive
->special
.b
.recalibrate
= 1;
143 (void)ide_dump_status(drive
, __func__
, stat
);
145 } else if (custom
&& tf
->command
== ATA_CMD_INIT_DEV_PARAMS
) {
146 if ((stat
& (ATA_ERR
| ATA_DRQ
)) == 0) {
147 ide_set_handler(drive
, &task_no_data_intr
,
148 WAIT_WORSTCASE
, NULL
);
152 return ide_error(drive
, "task_no_data_intr", stat
);
155 if (custom
&& tf
->command
== ATA_CMD_IDLEIMMEDIATE
) {
156 hwif
->tp_ops
->tf_read(drive
, cmd
);
157 if (tf
->lbal
!= 0xc4) {
158 printk(KERN_ERR
"%s: head unload failed!\n",
160 ide_tf_dump(drive
->name
, tf
);
162 drive
->dev_flags
|= IDE_DFLAG_PARKED
;
163 } else if (custom
&& tf
->command
== ATA_CMD_SET_MULTI
)
164 drive
->mult_count
= drive
->mult_req
;
166 if (custom
== 0 || tf
->command
== ATA_CMD_IDLEIMMEDIATE
) {
167 struct request
*rq
= hwif
->rq
;
168 u8 err
= ide_read_error(drive
);
170 if (blk_pm_request(rq
))
171 ide_complete_pm_rq(drive
, rq
);
173 if (rq
->cmd_type
== REQ_TYPE_ATA_TASKFILE
)
174 ide_complete_cmd(drive
, cmd
, stat
, err
);
175 ide_complete_rq(drive
, err
);
182 static u8
wait_drive_not_busy(ide_drive_t
*drive
)
184 ide_hwif_t
*hwif
= drive
->hwif
;
189 * Last sector was transfered, wait until device is ready. This can
190 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
192 for (retries
= 0; retries
< 1000; retries
++) {
193 stat
= hwif
->tp_ops
->read_status(hwif
);
202 printk(KERN_ERR
"%s: drive still BUSY!\n", drive
->name
);
207 static void ide_pio_sector(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
210 ide_hwif_t
*hwif
= drive
->hwif
;
211 struct scatterlist
*sg
= hwif
->sg_table
;
212 struct scatterlist
*cursg
= hwif
->cursg
;
214 #ifdef CONFIG_HIGHMEM
226 page
= sg_page(cursg
);
227 offset
= cursg
->offset
+ hwif
->cursg_ofs
* SECTOR_SIZE
;
229 /* get the current page and offset */
230 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
233 #ifdef CONFIG_HIGHMEM
234 local_irq_save(flags
);
236 buf
= kmap_atomic(page
, KM_BIO_SRC_IRQ
) + offset
;
241 if ((hwif
->cursg_ofs
* SECTOR_SIZE
) == cursg
->length
) {
242 hwif
->cursg
= sg_next(hwif
->cursg
);
246 /* do the actual data transfer */
248 hwif
->tp_ops
->output_data(drive
, cmd
, buf
, SECTOR_SIZE
);
250 hwif
->tp_ops
->input_data(drive
, cmd
, buf
, SECTOR_SIZE
);
252 kunmap_atomic(buf
, KM_BIO_SRC_IRQ
);
253 #ifdef CONFIG_HIGHMEM
254 local_irq_restore(flags
);
258 static void ide_pio_multi(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
263 nsect
= min_t(unsigned int, drive
->hwif
->nleft
, drive
->mult_count
);
265 ide_pio_sector(drive
, cmd
, write
);
268 static void ide_pio_datablock(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
271 u8 saved_io_32bit
= drive
->io_32bit
;
273 if (cmd
->tf_flags
& IDE_TFLAG_FS
)
276 if (cmd
->tf_flags
& IDE_TFLAG_IO_16BIT
)
279 touch_softlockup_watchdog();
281 switch (cmd
->data_phase
) {
282 case TASKFILE_MULTI_IN
:
283 case TASKFILE_MULTI_OUT
:
284 ide_pio_multi(drive
, cmd
, write
);
287 ide_pio_sector(drive
, cmd
, write
);
291 drive
->io_32bit
= saved_io_32bit
;
294 static ide_startstop_t
task_error(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
295 const char *s
, u8 stat
)
297 if (cmd
->tf_flags
& IDE_TFLAG_FS
) {
298 ide_hwif_t
*hwif
= drive
->hwif
;
299 int sectors
= hwif
->nsect
- hwif
->nleft
;
301 switch (cmd
->data_phase
) {
309 case TASKFILE_MULTI_IN
:
313 case TASKFILE_MULTI_OUT
:
314 sectors
-= drive
->mult_count
;
320 ide_end_request(drive
, 1, sectors
);
322 return ide_error(drive
, s
, stat
);
325 void ide_finish_cmd(ide_drive_t
*drive
, struct ide_cmd
*cmd
, u8 stat
)
327 if ((cmd
->tf_flags
& IDE_TFLAG_FS
) == 0) {
328 u8 err
= ide_read_error(drive
);
330 ide_complete_cmd(drive
, cmd
, stat
, err
);
331 ide_complete_rq(drive
, err
);
335 ide_end_request(drive
, 1, cmd
->rq
->nr_sectors
);
339 * We got an interrupt on a task_in case, but no errors and no DRQ.
341 * It might be a spurious irq (shared irq), but it might be a
342 * command that had no output.
344 static ide_startstop_t
task_in_unexpected(ide_drive_t
*drive
,
345 struct ide_cmd
*cmd
, u8 stat
)
347 /* Command all done? */
348 if (OK_STAT(stat
, ATA_DRDY
, ATA_BUSY
)) {
349 ide_finish_cmd(drive
, cmd
, stat
);
353 /* Assume it was a spurious irq */
354 ide_set_handler(drive
, &task_in_intr
, WAIT_WORSTCASE
, NULL
);
359 * Handler for command with PIO data-in phase (Read/Read Multiple).
361 static ide_startstop_t
task_in_intr(ide_drive_t
*drive
)
363 ide_hwif_t
*hwif
= drive
->hwif
;
364 struct ide_cmd
*cmd
= &drive
->hwif
->cmd
;
365 u8 stat
= hwif
->tp_ops
->read_status(hwif
);
369 return task_error(drive
, cmd
, __func__
, stat
);
371 /* Didn't want any data? Odd. */
372 if ((stat
& ATA_DRQ
) == 0)
373 return task_in_unexpected(drive
, cmd
, stat
);
375 ide_pio_datablock(drive
, cmd
, 0);
377 /* Are we done? Check status and finish transfer. */
379 stat
= wait_drive_not_busy(drive
);
380 if (!OK_STAT(stat
, 0, BAD_STAT
))
381 return task_error(drive
, cmd
, __func__
, stat
);
382 ide_finish_cmd(drive
, cmd
, stat
);
386 /* Still data left to transfer. */
387 ide_set_handler(drive
, &task_in_intr
, WAIT_WORSTCASE
, NULL
);
393 * Handler for command with PIO data-out phase (Write/Write Multiple).
395 static ide_startstop_t
task_out_intr (ide_drive_t
*drive
)
397 ide_hwif_t
*hwif
= drive
->hwif
;
398 struct ide_cmd
*cmd
= &drive
->hwif
->cmd
;
399 u8 stat
= hwif
->tp_ops
->read_status(hwif
);
401 if (!OK_STAT(stat
, DRIVE_READY
, drive
->bad_wstat
))
402 return task_error(drive
, cmd
, __func__
, stat
);
404 /* Deal with unexpected ATA data phase. */
405 if (((stat
& ATA_DRQ
) == 0) ^ !hwif
->nleft
)
406 return task_error(drive
, cmd
, __func__
, stat
);
409 ide_finish_cmd(drive
, cmd
, stat
);
413 /* Still data left to transfer. */
414 ide_pio_datablock(drive
, cmd
, 1);
415 ide_set_handler(drive
, &task_out_intr
, WAIT_WORSTCASE
, NULL
);
420 static ide_startstop_t
pre_task_out_intr(ide_drive_t
*drive
,
423 ide_startstop_t startstop
;
425 if (ide_wait_stat(&startstop
, drive
, ATA_DRQ
,
426 drive
->bad_wstat
, WAIT_DRQ
)) {
427 printk(KERN_ERR
"%s: no DRQ after issuing %sWRITE%s\n",
429 cmd
->data_phase
== TASKFILE_MULTI_OUT
? "MULT" : "",
430 (drive
->dev_flags
& IDE_DFLAG_LBA48
) ? "_EXT" : "");
434 if ((drive
->dev_flags
& IDE_DFLAG_UNMASK
) == 0)
437 ide_set_handler(drive
, &task_out_intr
, WAIT_WORSTCASE
, NULL
);
438 ide_pio_datablock(drive
, cmd
, 1);
443 int ide_raw_taskfile(ide_drive_t
*drive
, struct ide_cmd
*cmd
, u8
*buf
,
449 rq
= blk_get_request(drive
->queue
, READ
, __GFP_WAIT
);
450 rq
->cmd_type
= REQ_TYPE_ATA_TASKFILE
;
454 * (ks) We transfer currently only whole sectors.
455 * This is suffient for now. But, it would be great,
456 * if we would find a solution to transfer any size.
457 * To support special commands like READ LONG.
459 rq
->hard_nr_sectors
= rq
->nr_sectors
= nsect
;
460 rq
->hard_cur_sectors
= rq
->current_nr_sectors
= nsect
;
462 if (cmd
->tf_flags
& IDE_TFLAG_WRITE
)
463 rq
->cmd_flags
|= REQ_RW
;
468 error
= blk_execute_rq(drive
->queue
, NULL
, rq
, 0);
474 EXPORT_SYMBOL(ide_raw_taskfile
);
476 int ide_no_data_taskfile(ide_drive_t
*drive
, struct ide_cmd
*cmd
)
478 cmd
->data_phase
= TASKFILE_NO_DATA
;
480 return ide_raw_taskfile(drive
, cmd
, NULL
, 0);
482 EXPORT_SYMBOL_GPL(ide_no_data_taskfile
);
484 #ifdef CONFIG_IDE_TASK_IOCTL
485 int ide_taskfile_ioctl(ide_drive_t
*drive
, unsigned long arg
)
487 ide_task_request_t
*req_task
;
493 int tasksize
= sizeof(struct ide_task_request_s
);
494 unsigned int taskin
= 0;
495 unsigned int taskout
= 0;
497 char __user
*buf
= (char __user
*)arg
;
499 // printk("IDE Taskfile ...\n");
501 req_task
= kzalloc(tasksize
, GFP_KERNEL
);
502 if (req_task
== NULL
) return -ENOMEM
;
503 if (copy_from_user(req_task
, buf
, tasksize
)) {
508 taskout
= req_task
->out_size
;
509 taskin
= req_task
->in_size
;
511 if (taskin
> 65536 || taskout
> 65536) {
517 int outtotal
= tasksize
;
518 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
519 if (outbuf
== NULL
) {
523 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
530 int intotal
= tasksize
+ taskout
;
531 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
536 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
542 memset(&cmd
, 0, sizeof(cmd
));
544 memcpy(&cmd
.tf_array
[0], req_task
->hob_ports
,
545 HDIO_DRIVE_HOB_HDR_SIZE
- 2);
546 memcpy(&cmd
.tf_array
[6], req_task
->io_ports
,
547 HDIO_DRIVE_TASK_HDR_SIZE
);
549 cmd
.data_phase
= req_task
->data_phase
;
550 cmd
.tf_flags
= IDE_TFLAG_IO_16BIT
| IDE_TFLAG_DEVICE
|
553 if (drive
->dev_flags
& IDE_DFLAG_LBA48
)
554 cmd
.tf_flags
|= (IDE_TFLAG_LBA48
| IDE_TFLAG_IN_HOB
);
556 if (req_task
->out_flags
.all
) {
557 cmd
.ftf_flags
|= IDE_FTFLAG_FLAGGED
;
559 if (req_task
->out_flags
.b
.data
)
560 cmd
.ftf_flags
|= IDE_FTFLAG_OUT_DATA
;
562 if (req_task
->out_flags
.b
.nsector_hob
)
563 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_NSECT
;
564 if (req_task
->out_flags
.b
.sector_hob
)
565 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_LBAL
;
566 if (req_task
->out_flags
.b
.lcyl_hob
)
567 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_LBAM
;
568 if (req_task
->out_flags
.b
.hcyl_hob
)
569 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB_LBAH
;
571 if (req_task
->out_flags
.b
.error_feature
)
572 cmd
.tf_flags
|= IDE_TFLAG_OUT_FEATURE
;
573 if (req_task
->out_flags
.b
.nsector
)
574 cmd
.tf_flags
|= IDE_TFLAG_OUT_NSECT
;
575 if (req_task
->out_flags
.b
.sector
)
576 cmd
.tf_flags
|= IDE_TFLAG_OUT_LBAL
;
577 if (req_task
->out_flags
.b
.lcyl
)
578 cmd
.tf_flags
|= IDE_TFLAG_OUT_LBAM
;
579 if (req_task
->out_flags
.b
.hcyl
)
580 cmd
.tf_flags
|= IDE_TFLAG_OUT_LBAH
;
582 cmd
.tf_flags
|= IDE_TFLAG_OUT_TF
;
583 if (cmd
.tf_flags
& IDE_TFLAG_LBA48
)
584 cmd
.tf_flags
|= IDE_TFLAG_OUT_HOB
;
587 if (req_task
->in_flags
.b
.data
)
588 cmd
.ftf_flags
|= IDE_FTFLAG_IN_DATA
;
590 switch(req_task
->data_phase
) {
591 case TASKFILE_MULTI_OUT
:
592 if (!drive
->mult_count
) {
593 /* (hs): give up if multcount is not set */
594 printk(KERN_ERR
"%s: %s Multimode Write " \
595 "multcount is not set\n",
596 drive
->name
, __func__
);
603 case TASKFILE_OUT_DMAQ
:
604 case TASKFILE_OUT_DMA
:
605 nsect
= taskout
/ SECTOR_SIZE
;
608 case TASKFILE_MULTI_IN
:
609 if (!drive
->mult_count
) {
610 /* (hs): give up if multcount is not set */
611 printk(KERN_ERR
"%s: %s Multimode Read failure " \
612 "multcount is not set\n",
613 drive
->name
, __func__
);
620 case TASKFILE_IN_DMAQ
:
621 case TASKFILE_IN_DMA
:
622 nsect
= taskin
/ SECTOR_SIZE
;
625 case TASKFILE_NO_DATA
:
632 if (req_task
->req_cmd
== IDE_DRIVE_TASK_NO_DATA
)
635 nsect
= (cmd
.tf
.hob_nsect
<< 8) | cmd
.tf
.nsect
;
638 printk(KERN_ERR
"%s: in/out command without data\n",
645 if (req_task
->req_cmd
== IDE_DRIVE_TASK_RAW_WRITE
)
646 cmd
.tf_flags
|= IDE_TFLAG_WRITE
;
648 err
= ide_raw_taskfile(drive
, &cmd
, data_buf
, nsect
);
650 memcpy(req_task
->hob_ports
, &cmd
.tf_array
[0],
651 HDIO_DRIVE_HOB_HDR_SIZE
- 2);
652 memcpy(req_task
->io_ports
, &cmd
.tf_array
[6],
653 HDIO_DRIVE_TASK_HDR_SIZE
);
655 if ((cmd
.ftf_flags
& IDE_FTFLAG_SET_IN_FLAGS
) &&
656 req_task
->in_flags
.all
== 0) {
657 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
658 if (drive
->dev_flags
& IDE_DFLAG_LBA48
)
659 req_task
->in_flags
.all
|= (IDE_HOB_STD_IN_FLAGS
<< 8);
662 if (copy_to_user(buf
, req_task
, tasksize
)) {
667 int outtotal
= tasksize
;
668 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
674 int intotal
= tasksize
+ taskout
;
675 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
685 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);