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 pre_task_out_intr(ide_drive_t *, struct request *);
57 static ide_startstop_t task_in_intr(ide_drive_t *);
59 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
61 ide_hwif_t *hwif = HWIF(drive);
62 struct ide_taskfile *tf = &task->tf;
63 ide_handler_t *handler = NULL;
64 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
65 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
67 if (task->data_phase == TASKFILE_MULTI_IN ||
68 task->data_phase == TASKFILE_MULTI_OUT) {
69 if (!drive->mult_count) {
70 printk(KERN_ERR "%s: multimode not set!\n",
76 if (task->tf_flags & IDE_TFLAG_FLAGGED)
77 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
79 memcpy(&hwif->task, task, sizeof(*task));
81 if ((task->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, task);
88 switch (task->data_phase) {
89 case TASKFILE_MULTI_OUT:
91 tp_ops->exec_command(hwif, tf->command);
92 ndelay(400); /* FIXME */
93 return pre_task_out_intr(drive, task->rq);
94 case TASKFILE_MULTI_IN:
96 handler = task_in_intr;
98 case TASKFILE_NO_DATA:
100 handler = task_no_data_intr;
101 ide_execute_command(drive, tf->command, handler,
102 WAIT_WORSTCASE, NULL);
105 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 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);
116 * Handler for commands without a data phase
118 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
120 ide_hwif_t *hwif = drive->hwif;
121 ide_task_t *task = &hwif->task;
122 struct ide_taskfile *tf = &task->tf;
123 int custom = (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
124 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
127 local_irq_enable_in_hardirq();
130 stat = hwif->tp_ops->read_status(hwif);
131 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
136 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
137 if (custom && tf->command == ATA_CMD_SET_MULTI) {
138 drive->mult_req = drive->mult_count = 0;
139 drive->special.b.recalibrate = 1;
140 (void)ide_dump_status(drive, __func__, stat);
142 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
143 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
144 ide_set_handler(drive, &task_no_data_intr,
145 WAIT_WORSTCASE, NULL);
149 return ide_error(drive, "task_no_data_intr", stat);
150 /* calls ide_end_drive_cmd */
154 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
155 else if (tf->command == ATA_CMD_SET_MULTI)
156 drive->mult_count = drive->mult_req;
161 static u8 wait_drive_not_busy(ide_drive_t *drive)
163 ide_hwif_t *hwif = drive->hwif;
168 * Last sector was transfered, wait until device is ready. This can
169 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
171 for (retries = 0; retries < 1000; retries++) {
172 stat = hwif->tp_ops->read_status(hwif);
181 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
186 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
189 ide_hwif_t *hwif = drive->hwif;
190 struct scatterlist *sg = hwif->sg_table;
191 struct scatterlist *cursg = hwif->cursg;
193 #ifdef CONFIG_HIGHMEM
205 page = sg_page(cursg);
206 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
208 /* get the current page and offset */
209 page = nth_page(page, (offset >> PAGE_SHIFT));
212 #ifdef CONFIG_HIGHMEM
213 local_irq_save(flags);
215 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
220 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
221 hwif->cursg = sg_next(hwif->cursg);
225 /* do the actual data transfer */
227 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
229 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
231 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
232 #ifdef CONFIG_HIGHMEM
233 local_irq_restore(flags);
237 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
242 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
244 ide_pio_sector(drive, rq, write);
247 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
250 u8 saved_io_32bit = drive->io_32bit;
252 if (rq->bio) /* fs request */
255 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
256 ide_task_t *task = rq->special;
258 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
262 touch_softlockup_watchdog();
264 switch (drive->hwif->data_phase) {
265 case TASKFILE_MULTI_IN:
266 case TASKFILE_MULTI_OUT:
267 ide_pio_multi(drive, rq, write);
270 ide_pio_sector(drive, rq, write);
274 drive->io_32bit = saved_io_32bit;
277 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
278 const char *s, u8 stat)
281 ide_hwif_t *hwif = drive->hwif;
282 int sectors = hwif->nsect - hwif->nleft;
284 switch (hwif->data_phase) {
292 case TASKFILE_MULTI_IN:
296 case TASKFILE_MULTI_OUT:
297 sectors -= drive->mult_count;
305 drv = *(ide_driver_t **)rq->rq_disk->private_data;
306 drv->end_request(drive, 1, sectors);
309 return ide_error(drive, s, stat);
312 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
314 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
315 u8 err = ide_read_error(drive);
317 ide_end_drive_cmd(drive, stat, err);
324 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
325 drv->end_request(drive, 1, rq->nr_sectors);
327 ide_end_request(drive, 1, rq->nr_sectors);
331 * We got an interrupt on a task_in case, but no errors and no DRQ.
333 * It might be a spurious irq (shared irq), but it might be a
334 * command that had no output.
336 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
338 /* Command all done? */
339 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
340 task_end_request(drive, rq, stat);
344 /* Assume it was a spurious irq */
345 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
350 * Handler for command with PIO data-in phase (Read/Read Multiple).
352 static ide_startstop_t task_in_intr(ide_drive_t *drive)
354 ide_hwif_t *hwif = drive->hwif;
355 struct request *rq = hwif->hwgroup->rq;
356 u8 stat = hwif->tp_ops->read_status(hwif);
360 return task_error(drive, rq, __func__, stat);
362 /* Didn't want any data? Odd. */
363 if ((stat & ATA_DRQ) == 0)
364 return task_in_unexpected(drive, rq, stat);
366 ide_pio_datablock(drive, rq, 0);
368 /* Are we done? Check status and finish transfer. */
370 stat = wait_drive_not_busy(drive);
371 if (!OK_STAT(stat, 0, BAD_STAT))
372 return task_error(drive, rq, __func__, stat);
373 task_end_request(drive, rq, stat);
377 /* Still data left to transfer. */
378 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
384 * Handler for command with PIO data-out phase (Write/Write Multiple).
386 static ide_startstop_t task_out_intr (ide_drive_t *drive)
388 ide_hwif_t *hwif = drive->hwif;
389 struct request *rq = HWGROUP(drive)->rq;
390 u8 stat = hwif->tp_ops->read_status(hwif);
392 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
393 return task_error(drive, rq, __func__, stat);
395 /* Deal with unexpected ATA data phase. */
396 if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
397 return task_error(drive, rq, __func__, stat);
400 task_end_request(drive, rq, stat);
404 /* Still data left to transfer. */
405 ide_pio_datablock(drive, rq, 1);
406 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
411 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
413 ide_startstop_t startstop;
415 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
416 drive->bad_wstat, WAIT_DRQ)) {
417 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
418 drive->name, drive->hwif->data_phase ? "MULT" : "",
419 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
423 if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
426 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
427 ide_pio_datablock(drive, rq, 1);
432 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
437 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
438 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
442 * (ks) We transfer currently only whole sectors.
443 * This is suffient for now. But, it would be great,
444 * if we would find a solution to transfer any size.
445 * To support special commands like READ LONG.
447 rq->hard_nr_sectors = rq->nr_sectors = nsect;
448 rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
450 if (task->tf_flags & IDE_TFLAG_WRITE)
451 rq->cmd_flags |= REQ_RW;
456 error = blk_execute_rq(drive->queue, NULL, rq, 0);
462 EXPORT_SYMBOL(ide_raw_taskfile);
464 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
466 task->data_phase = TASKFILE_NO_DATA;
468 return ide_raw_taskfile(drive, task, NULL, 0);
470 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
472 #ifdef CONFIG_IDE_TASK_IOCTL
473 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
475 ide_task_request_t *req_task;
481 int tasksize = sizeof(struct ide_task_request_s);
482 unsigned int taskin = 0;
483 unsigned int taskout = 0;
485 char __user *buf = (char __user *)arg;
487 // printk("IDE Taskfile ...\n");
489 req_task = kzalloc(tasksize, GFP_KERNEL);
490 if (req_task == NULL) return -ENOMEM;
491 if (copy_from_user(req_task, buf, tasksize)) {
496 taskout = req_task->out_size;
497 taskin = req_task->in_size;
499 if (taskin > 65536 || taskout > 65536) {
505 int outtotal = tasksize;
506 outbuf = kzalloc(taskout, GFP_KERNEL);
507 if (outbuf == NULL) {
511 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
518 int intotal = tasksize + taskout;
519 inbuf = kzalloc(taskin, GFP_KERNEL);
524 if (copy_from_user(inbuf, buf + intotal, taskin)) {
530 memset(&args, 0, sizeof(ide_task_t));
532 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
533 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
535 args.data_phase = req_task->data_phase;
537 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
539 if (drive->dev_flags & IDE_DFLAG_LBA48)
540 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
542 if (req_task->out_flags.all) {
543 args.tf_flags |= IDE_TFLAG_FLAGGED;
545 if (req_task->out_flags.b.data)
546 args.tf_flags |= IDE_TFLAG_OUT_DATA;
548 if (req_task->out_flags.b.nsector_hob)
549 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
550 if (req_task->out_flags.b.sector_hob)
551 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
552 if (req_task->out_flags.b.lcyl_hob)
553 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
554 if (req_task->out_flags.b.hcyl_hob)
555 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
557 if (req_task->out_flags.b.error_feature)
558 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
559 if (req_task->out_flags.b.nsector)
560 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
561 if (req_task->out_flags.b.sector)
562 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
563 if (req_task->out_flags.b.lcyl)
564 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
565 if (req_task->out_flags.b.hcyl)
566 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
568 args.tf_flags |= IDE_TFLAG_OUT_TF;
569 if (args.tf_flags & IDE_TFLAG_LBA48)
570 args.tf_flags |= IDE_TFLAG_OUT_HOB;
573 if (req_task->in_flags.b.data)
574 args.tf_flags |= IDE_TFLAG_IN_DATA;
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__);
589 case TASKFILE_OUT_DMAQ:
590 case TASKFILE_OUT_DMA:
591 nsect = taskout / SECTOR_SIZE;
594 case TASKFILE_MULTI_IN:
595 if (!drive->mult_count) {
596 /* (hs): give up if multcount is not set */
597 printk(KERN_ERR "%s: %s Multimode Read failure " \
598 "multcount is not set\n",
599 drive->name, __func__);
606 case TASKFILE_IN_DMAQ:
607 case TASKFILE_IN_DMA:
608 nsect = taskin / SECTOR_SIZE;
611 case TASKFILE_NO_DATA:
618 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
621 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
624 printk(KERN_ERR "%s: in/out command without data\n",
631 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
632 args.tf_flags |= IDE_TFLAG_WRITE;
634 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
636 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
637 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
639 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
640 req_task->in_flags.all == 0) {
641 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
642 if (drive->dev_flags & IDE_DFLAG_LBA48)
643 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
646 if (copy_to_user(buf, req_task, tasksize)) {
651 int outtotal = tasksize;
652 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
658 int intotal = tasksize + taskout;
659 if (copy_to_user(buf + intotal, inbuf, taskin)) {
669 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);