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(&args, 0, sizeof(ide_task_t));
46 if (drive->media == ide_disk)
47 args.tf.command = ATA_CMD_ID_ATA;
49 args.tf.command = ATA_CMD_ID_ATAPI;
50 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
51 args.data_phase = TASKFILE_IN;
52 return ide_raw_taskfile(drive, &args, buf, 1);
55 static ide_startstop_t task_no_data_intr(ide_drive_t *);
56 static ide_startstop_t set_geometry_intr(ide_drive_t *);
57 static ide_startstop_t recal_intr(ide_drive_t *);
58 static ide_startstop_t set_multmode_intr(ide_drive_t *);
59 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
60 static ide_startstop_t task_in_intr(ide_drive_t *);
62 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
64 ide_hwif_t *hwif = HWIF(drive);
65 struct ide_taskfile *tf = &task->tf;
66 ide_handler_t *handler = NULL;
67 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
68 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
70 if (task->data_phase == TASKFILE_MULTI_IN ||
71 task->data_phase == TASKFILE_MULTI_OUT) {
72 if (!drive->mult_count) {
73 printk(KERN_ERR "%s: multimode not set!\n",
79 if (task->tf_flags & IDE_TFLAG_FLAGGED)
80 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
82 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
83 ide_tf_dump(drive->name, tf);
84 tp_ops->set_irq(hwif, 1);
85 SELECT_MASK(drive, 0);
86 tp_ops->tf_load(drive, task);
89 switch (task->data_phase) {
90 case TASKFILE_MULTI_OUT:
92 tp_ops->exec_command(hwif, tf->command);
93 ndelay(400); /* FIXME */
94 return pre_task_out_intr(drive, task->rq);
95 case TASKFILE_MULTI_IN:
97 handler = task_in_intr;
99 case TASKFILE_NO_DATA:
101 handler = task_no_data_intr;
102 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
103 switch (tf->command) {
104 case ATA_CMD_INIT_DEV_PARAMS:
105 handler = set_geometry_intr;
107 case ATA_CMD_RESTORE:
108 handler = recal_intr;
110 case ATA_CMD_SET_MULTI:
111 handler = set_multmode_intr;
115 ide_execute_command(drive, tf->command, handler,
116 WAIT_WORSTCASE, NULL);
119 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
120 dma_ops->dma_setup(drive))
122 dma_ops->dma_exec_cmd(drive, tf->command);
123 dma_ops->dma_start(drive);
127 EXPORT_SYMBOL_GPL(do_rw_taskfile);
130 * set_multmode_intr() is invoked on completion of a ATA_CMD_SET_MULTI cmd.
132 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
134 ide_hwif_t *hwif = drive->hwif;
137 local_irq_enable_in_hardirq();
138 stat = hwif->tp_ops->read_status(hwif);
140 if (OK_STAT(stat, ATA_DRDY, BAD_STAT))
141 drive->mult_count = drive->mult_req;
143 drive->mult_req = drive->mult_count = 0;
144 drive->special.b.recalibrate = 1;
145 (void) ide_dump_status(drive, "set_multmode", stat);
151 * set_geometry_intr() is invoked on completion of a ATA_CMD_INIT_DEV_PARAMS cmd.
153 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
155 ide_hwif_t *hwif = drive->hwif;
159 local_irq_enable_in_hardirq();
162 stat = hwif->tp_ops->read_status(hwif);
163 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
168 if (OK_STAT(stat, ATA_DRDY, BAD_STAT))
171 if (stat & (ATA_ERR | ATA_DRQ))
172 return ide_error(drive, "set_geometry_intr", stat);
174 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
179 * recal_intr() is invoked on completion of a ATA_CMD_RESTORE (recalibrate) cmd.
181 static ide_startstop_t recal_intr(ide_drive_t *drive)
183 ide_hwif_t *hwif = drive->hwif;
186 local_irq_enable_in_hardirq();
187 stat = hwif->tp_ops->read_status(hwif);
189 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT))
190 return ide_error(drive, "recal_intr", stat);
195 * Handler for commands without a data phase
197 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
199 ide_hwif_t *hwif = drive->hwif;
200 ide_task_t *args = hwif->hwgroup->rq->special;
203 local_irq_enable_in_hardirq();
204 stat = hwif->tp_ops->read_status(hwif);
206 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT))
207 return ide_error(drive, "task_no_data_intr", stat);
208 /* calls ide_end_drive_cmd */
211 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
216 static u8 wait_drive_not_busy(ide_drive_t *drive)
218 ide_hwif_t *hwif = drive->hwif;
223 * Last sector was transfered, wait until device is ready. This can
224 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
226 for (retries = 0; retries < 1000; retries++) {
227 stat = hwif->tp_ops->read_status(hwif);
236 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
241 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
244 ide_hwif_t *hwif = drive->hwif;
245 struct scatterlist *sg = hwif->sg_table;
246 struct scatterlist *cursg = hwif->cursg;
248 #ifdef CONFIG_HIGHMEM
260 page = sg_page(cursg);
261 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
263 /* get the current page and offset */
264 page = nth_page(page, (offset >> PAGE_SHIFT));
267 #ifdef CONFIG_HIGHMEM
268 local_irq_save(flags);
270 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
275 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
276 hwif->cursg = sg_next(hwif->cursg);
280 /* do the actual data transfer */
282 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
284 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
286 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
287 #ifdef CONFIG_HIGHMEM
288 local_irq_restore(flags);
292 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
297 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
299 ide_pio_sector(drive, rq, write);
302 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
305 u8 saved_io_32bit = drive->io_32bit;
307 if (rq->bio) /* fs request */
310 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
311 ide_task_t *task = rq->special;
313 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
317 touch_softlockup_watchdog();
319 switch (drive->hwif->data_phase) {
320 case TASKFILE_MULTI_IN:
321 case TASKFILE_MULTI_OUT:
322 ide_pio_multi(drive, rq, write);
325 ide_pio_sector(drive, rq, write);
329 drive->io_32bit = saved_io_32bit;
332 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
333 const char *s, u8 stat)
336 ide_hwif_t *hwif = drive->hwif;
337 int sectors = hwif->nsect - hwif->nleft;
339 switch (hwif->data_phase) {
347 case TASKFILE_MULTI_IN:
351 case TASKFILE_MULTI_OUT:
352 sectors -= drive->mult_count;
360 drv = *(ide_driver_t **)rq->rq_disk->private_data;
361 drv->end_request(drive, 1, sectors);
364 return ide_error(drive, s, stat);
367 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
369 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
370 u8 err = ide_read_error(drive);
372 ide_end_drive_cmd(drive, stat, err);
379 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
380 drv->end_request(drive, 1, rq->nr_sectors);
382 ide_end_request(drive, 1, rq->nr_sectors);
386 * We got an interrupt on a task_in case, but no errors and no DRQ.
388 * It might be a spurious irq (shared irq), but it might be a
389 * command that had no output.
391 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
393 /* Command all done? */
394 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
395 task_end_request(drive, rq, stat);
399 /* Assume it was a spurious irq */
400 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
405 * Handler for command with PIO data-in phase (Read/Read Multiple).
407 static ide_startstop_t task_in_intr(ide_drive_t *drive)
409 ide_hwif_t *hwif = drive->hwif;
410 struct request *rq = hwif->hwgroup->rq;
411 u8 stat = hwif->tp_ops->read_status(hwif);
415 return task_error(drive, rq, __func__, stat);
417 /* Didn't want any data? Odd. */
418 if ((stat & ATA_DRQ) == 0)
419 return task_in_unexpected(drive, rq, stat);
421 ide_pio_datablock(drive, rq, 0);
423 /* Are we done? Check status and finish transfer. */
425 stat = wait_drive_not_busy(drive);
426 if (!OK_STAT(stat, 0, BAD_STAT))
427 return task_error(drive, rq, __func__, stat);
428 task_end_request(drive, rq, stat);
432 /* Still data left to transfer. */
433 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
439 * Handler for command with PIO data-out phase (Write/Write Multiple).
441 static ide_startstop_t task_out_intr (ide_drive_t *drive)
443 ide_hwif_t *hwif = drive->hwif;
444 struct request *rq = HWGROUP(drive)->rq;
445 u8 stat = hwif->tp_ops->read_status(hwif);
447 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
448 return task_error(drive, rq, __func__, stat);
450 /* Deal with unexpected ATA data phase. */
451 if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
452 return task_error(drive, rq, __func__, stat);
455 task_end_request(drive, rq, stat);
459 /* Still data left to transfer. */
460 ide_pio_datablock(drive, rq, 1);
461 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
466 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
468 ide_startstop_t startstop;
470 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
471 drive->bad_wstat, WAIT_DRQ)) {
472 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
473 drive->name, drive->hwif->data_phase ? "MULT" : "",
474 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
478 if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
481 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
482 ide_pio_datablock(drive, rq, 1);
487 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
492 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
493 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
497 * (ks) We transfer currently only whole sectors.
498 * This is suffient for now. But, it would be great,
499 * if we would find a solution to transfer any size.
500 * To support special commands like READ LONG.
502 rq->hard_nr_sectors = rq->nr_sectors = nsect;
503 rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
505 if (task->tf_flags & IDE_TFLAG_WRITE)
506 rq->cmd_flags |= REQ_RW;
511 error = blk_execute_rq(drive->queue, NULL, rq, 0);
517 EXPORT_SYMBOL(ide_raw_taskfile);
519 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
521 task->data_phase = TASKFILE_NO_DATA;
523 return ide_raw_taskfile(drive, task, NULL, 0);
525 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
527 #ifdef CONFIG_IDE_TASK_IOCTL
528 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
530 ide_task_request_t *req_task;
536 int tasksize = sizeof(struct ide_task_request_s);
537 unsigned int taskin = 0;
538 unsigned int taskout = 0;
540 char __user *buf = (char __user *)arg;
542 // printk("IDE Taskfile ...\n");
544 req_task = kzalloc(tasksize, GFP_KERNEL);
545 if (req_task == NULL) return -ENOMEM;
546 if (copy_from_user(req_task, buf, tasksize)) {
551 taskout = req_task->out_size;
552 taskin = req_task->in_size;
554 if (taskin > 65536 || taskout > 65536) {
560 int outtotal = tasksize;
561 outbuf = kzalloc(taskout, GFP_KERNEL);
562 if (outbuf == NULL) {
566 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
573 int intotal = tasksize + taskout;
574 inbuf = kzalloc(taskin, GFP_KERNEL);
579 if (copy_from_user(inbuf, buf + intotal, taskin)) {
585 memset(&args, 0, sizeof(ide_task_t));
587 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
588 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
590 args.data_phase = req_task->data_phase;
592 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
594 if (drive->dev_flags & IDE_DFLAG_LBA48)
595 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
597 if (req_task->out_flags.all) {
598 args.tf_flags |= IDE_TFLAG_FLAGGED;
600 if (req_task->out_flags.b.data)
601 args.tf_flags |= IDE_TFLAG_OUT_DATA;
603 if (req_task->out_flags.b.nsector_hob)
604 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
605 if (req_task->out_flags.b.sector_hob)
606 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
607 if (req_task->out_flags.b.lcyl_hob)
608 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
609 if (req_task->out_flags.b.hcyl_hob)
610 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
612 if (req_task->out_flags.b.error_feature)
613 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
614 if (req_task->out_flags.b.nsector)
615 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
616 if (req_task->out_flags.b.sector)
617 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
618 if (req_task->out_flags.b.lcyl)
619 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
620 if (req_task->out_flags.b.hcyl)
621 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
623 args.tf_flags |= IDE_TFLAG_OUT_TF;
624 if (args.tf_flags & IDE_TFLAG_LBA48)
625 args.tf_flags |= IDE_TFLAG_OUT_HOB;
628 if (req_task->in_flags.b.data)
629 args.tf_flags |= IDE_TFLAG_IN_DATA;
631 switch(req_task->data_phase) {
632 case TASKFILE_MULTI_OUT:
633 if (!drive->mult_count) {
634 /* (hs): give up if multcount is not set */
635 printk(KERN_ERR "%s: %s Multimode Write " \
636 "multcount is not set\n",
637 drive->name, __func__);
644 case TASKFILE_OUT_DMAQ:
645 case TASKFILE_OUT_DMA:
646 nsect = taskout / SECTOR_SIZE;
649 case TASKFILE_MULTI_IN:
650 if (!drive->mult_count) {
651 /* (hs): give up if multcount is not set */
652 printk(KERN_ERR "%s: %s Multimode Read failure " \
653 "multcount is not set\n",
654 drive->name, __func__);
661 case TASKFILE_IN_DMAQ:
662 case TASKFILE_IN_DMA:
663 nsect = taskin / SECTOR_SIZE;
666 case TASKFILE_NO_DATA:
673 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
676 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
679 printk(KERN_ERR "%s: in/out command without data\n",
686 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
687 args.tf_flags |= IDE_TFLAG_WRITE;
689 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
691 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
692 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
694 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
695 req_task->in_flags.all == 0) {
696 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
697 if (drive->dev_flags & IDE_DFLAG_LBA48)
698 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
701 if (copy_to_user(buf, req_task, tasksize)) {
706 int outtotal = tasksize;
707 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
713 int intotal = tasksize + taskout;
714 if (copy_to_user(buf + intotal, inbuf, taskin)) {
724 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);