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_readback(ide_drive_t *drive, struct ide_cmd *cmd)
28 ide_hwif_t *hwif = drive->hwif;
29 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
31 /* Be sure we're looking at the low order bytes */
32 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
34 tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
36 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
37 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
39 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
43 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
46 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
47 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
48 s, cmd->tf.feature, cmd->tf.nsect,
49 cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
50 cmd->tf.device, cmd->tf.command);
51 printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
52 s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
56 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
60 memset(&cmd, 0, sizeof(cmd));
62 if (drive->media == ide_disk)
63 cmd.tf.command = ATA_CMD_ID_ATA;
65 cmd.tf.command = ATA_CMD_ID_ATAPI;
66 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
67 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
68 cmd.protocol = ATA_PROT_PIO;
70 return ide_raw_taskfile(drive, &cmd, buf, 1);
73 static ide_startstop_t task_no_data_intr(ide_drive_t *);
74 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
75 static ide_startstop_t task_pio_intr(ide_drive_t *);
77 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
79 ide_hwif_t *hwif = drive->hwif;
80 struct ide_cmd *cmd = &hwif->cmd;
81 struct ide_taskfile *tf = &cmd->tf;
82 ide_handler_t *handler = NULL;
83 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
84 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
86 if (orig_cmd->protocol == ATA_PROT_PIO &&
87 (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
88 drive->mult_count == 0) {
89 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
93 if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
94 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
96 memcpy(cmd, orig_cmd, sizeof(*cmd));
98 if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
99 ide_tf_dump(drive->name, cmd);
100 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
102 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
103 u8 data[2] = { cmd->tf.data, cmd->hob.data };
105 tp_ops->output_data(drive, cmd, data, 2);
108 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
109 u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
112 if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
113 cmd->tf.device &= HIHI;
114 cmd->tf.device |= drive->select;
117 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
118 tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf);
121 switch (cmd->protocol) {
123 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
124 tp_ops->exec_command(hwif, tf->command);
125 ndelay(400); /* FIXME */
126 return pre_task_out_intr(drive, cmd);
128 handler = task_pio_intr;
130 case ATA_PROT_NODATA:
132 handler = task_no_data_intr;
133 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
136 if (ide_dma_prepare(drive, cmd))
138 hwif->expiry = dma_ops->dma_timer_expiry;
139 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
140 dma_ops->dma_start(drive);
145 EXPORT_SYMBOL_GPL(do_rw_taskfile);
147 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
149 ide_hwif_t *hwif = drive->hwif;
150 struct ide_cmd *cmd = &hwif->cmd;
151 struct ide_taskfile *tf = &cmd->tf;
152 int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
153 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
156 local_irq_enable_in_hardirq();
159 stat = hwif->tp_ops->read_status(hwif);
160 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
165 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
166 if (custom && tf->command == ATA_CMD_SET_MULTI) {
167 drive->mult_req = drive->mult_count = 0;
168 drive->special_flags |= IDE_SFLAG_RECALIBRATE;
169 (void)ide_dump_status(drive, __func__, stat);
171 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
172 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
173 ide_set_handler(drive, &task_no_data_intr,
178 return ide_error(drive, "task_no_data_intr", stat);
181 if (custom && tf->command == ATA_CMD_SET_MULTI)
182 drive->mult_count = drive->mult_req;
184 if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
185 tf->command == ATA_CMD_CHK_POWER) {
186 struct request *rq = hwif->rq;
188 if (blk_pm_request(rq))
189 ide_complete_pm_rq(drive, rq);
191 ide_finish_cmd(drive, cmd, stat);
197 static u8 wait_drive_not_busy(ide_drive_t *drive)
199 ide_hwif_t *hwif = drive->hwif;
204 * Last sector was transfered, wait until device is ready. This can
205 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
207 for (retries = 0; retries < 1000; retries++) {
208 stat = hwif->tp_ops->read_status(hwif);
217 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
222 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
223 unsigned int write, unsigned int len)
225 ide_hwif_t *hwif = drive->hwif;
226 struct scatterlist *sg = hwif->sg_table;
227 struct scatterlist *cursg = cmd->cursg;
235 cursg = cmd->cursg = sg;
238 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
240 if (nr_bytes > PAGE_SIZE)
241 nr_bytes = PAGE_SIZE;
243 page = sg_page(cursg);
244 offset = cursg->offset + cmd->cursg_ofs;
246 /* get the current page and offset */
247 page = nth_page(page, (offset >> PAGE_SHIFT));
250 if (PageHighMem(page))
251 local_irq_save(flags);
253 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
255 cmd->nleft -= nr_bytes;
256 cmd->cursg_ofs += nr_bytes;
258 if (cmd->cursg_ofs == cursg->length) {
259 cursg = cmd->cursg = sg_next(cmd->cursg);
263 /* do the actual data transfer */
265 hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
267 hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
269 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
271 if (PageHighMem(page))
272 local_irq_restore(flags);
277 EXPORT_SYMBOL_GPL(ide_pio_bytes);
279 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
282 unsigned int nr_bytes;
284 u8 saved_io_32bit = drive->io_32bit;
286 if (cmd->tf_flags & IDE_TFLAG_FS)
289 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
292 touch_softlockup_watchdog();
294 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
295 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
297 nr_bytes = SECTOR_SIZE;
299 ide_pio_bytes(drive, cmd, write, nr_bytes);
301 drive->io_32bit = saved_io_32bit;
304 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
306 if (cmd->tf_flags & IDE_TFLAG_FS) {
307 int nr_bytes = cmd->nbytes - cmd->nleft;
309 if (cmd->protocol == ATA_PROT_PIO &&
310 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
311 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
312 nr_bytes -= drive->mult_count << 9;
314 nr_bytes -= SECTOR_SIZE;
318 ide_complete_rq(drive, 0, nr_bytes);
322 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
324 struct request *rq = drive->hwif->rq;
325 u8 err = ide_read_error(drive);
327 ide_complete_cmd(drive, cmd, stat, err);
329 ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
333 * Handler for command with PIO data phase.
335 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
337 ide_hwif_t *hwif = drive->hwif;
338 struct ide_cmd *cmd = &drive->hwif->cmd;
339 u8 stat = hwif->tp_ops->read_status(hwif);
340 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
347 /* Didn't want any data? Odd. */
348 if ((stat & ATA_DRQ) == 0) {
349 /* Command all done? */
350 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
353 /* Assume it was a spurious irq */
357 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
360 /* Deal with unexpected ATA data phase. */
361 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
365 if (write && cmd->nleft == 0)
368 /* Still data left to transfer. */
369 ide_pio_datablock(drive, cmd, write);
371 /* Are we done? Check status and finish transfer. */
372 if (write == 0 && cmd->nleft == 0) {
373 stat = wait_drive_not_busy(drive);
374 if (!OK_STAT(stat, 0, BAD_STAT))
380 /* Still data left to transfer. */
381 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
384 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
385 ide_finish_cmd(drive, cmd, stat);
387 ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
390 ide_error_cmd(drive, cmd);
391 return ide_error(drive, __func__, stat);
394 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
397 ide_startstop_t startstop;
399 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
400 drive->bad_wstat, WAIT_DRQ)) {
401 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
403 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
404 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
408 if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
411 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
413 ide_pio_datablock(drive, cmd, 1);
418 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
424 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
425 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
427 if (cmd->tf_flags & IDE_TFLAG_WRITE)
428 rq->cmd_flags |= REQ_RW;
431 * (ks) We transfer currently only whole sectors.
432 * This is suffient for now. But, it would be great,
433 * if we would find a solution to transfer any size.
434 * To support special commands like READ LONG.
437 error = blk_rq_map_kern(drive->queue, rq, buf,
438 nsect * SECTOR_SIZE, __GFP_WAIT);
446 error = blk_execute_rq(drive->queue, NULL, rq, 0);
453 EXPORT_SYMBOL(ide_raw_taskfile);
455 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
457 cmd->protocol = ATA_PROT_NODATA;
459 return ide_raw_taskfile(drive, cmd, NULL, 0);
461 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
463 #ifdef CONFIG_IDE_TASK_IOCTL
464 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
466 ide_task_request_t *req_task;
472 int tasksize = sizeof(struct ide_task_request_s);
473 unsigned int taskin = 0;
474 unsigned int taskout = 0;
476 char __user *buf = (char __user *)arg;
478 // printk("IDE Taskfile ...\n");
480 req_task = kzalloc(tasksize, GFP_KERNEL);
481 if (req_task == NULL) return -ENOMEM;
482 if (copy_from_user(req_task, buf, tasksize)) {
487 taskout = req_task->out_size;
488 taskin = req_task->in_size;
490 if (taskin > 65536 || taskout > 65536) {
496 int outtotal = tasksize;
497 outbuf = kzalloc(taskout, GFP_KERNEL);
498 if (outbuf == NULL) {
502 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
509 int intotal = tasksize + taskout;
510 inbuf = kzalloc(taskin, GFP_KERNEL);
515 if (copy_from_user(inbuf, buf + intotal, taskin)) {
521 memset(&cmd, 0, sizeof(cmd));
523 memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
524 memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
526 cmd.valid.out.tf = IDE_VALID_DEVICE;
527 cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
528 cmd.tf_flags = IDE_TFLAG_IO_16BIT;
530 if (drive->dev_flags & IDE_DFLAG_LBA48) {
531 cmd.tf_flags |= IDE_TFLAG_LBA48;
532 cmd.valid.in.hob = IDE_VALID_IN_HOB;
535 if (req_task->out_flags.all) {
536 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
538 if (req_task->out_flags.b.data)
539 cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
541 if (req_task->out_flags.b.nsector_hob)
542 cmd.valid.out.hob |= IDE_VALID_NSECT;
543 if (req_task->out_flags.b.sector_hob)
544 cmd.valid.out.hob |= IDE_VALID_LBAL;
545 if (req_task->out_flags.b.lcyl_hob)
546 cmd.valid.out.hob |= IDE_VALID_LBAM;
547 if (req_task->out_flags.b.hcyl_hob)
548 cmd.valid.out.hob |= IDE_VALID_LBAH;
550 if (req_task->out_flags.b.error_feature)
551 cmd.valid.out.tf |= IDE_VALID_FEATURE;
552 if (req_task->out_flags.b.nsector)
553 cmd.valid.out.tf |= IDE_VALID_NSECT;
554 if (req_task->out_flags.b.sector)
555 cmd.valid.out.tf |= IDE_VALID_LBAL;
556 if (req_task->out_flags.b.lcyl)
557 cmd.valid.out.tf |= IDE_VALID_LBAM;
558 if (req_task->out_flags.b.hcyl)
559 cmd.valid.out.tf |= IDE_VALID_LBAH;
561 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
562 if (cmd.tf_flags & IDE_TFLAG_LBA48)
563 cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
566 if (req_task->in_flags.b.data)
567 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
569 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
570 /* fixup data phase if needed */
571 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
572 req_task->data_phase == TASKFILE_IN_DMA)
573 cmd.tf_flags |= IDE_TFLAG_WRITE;
576 cmd.protocol = ATA_PROT_DMA;
578 switch (req_task->data_phase) {
579 case TASKFILE_MULTI_OUT:
580 if (!drive->mult_count) {
581 /* (hs): give up if multcount is not set */
582 printk(KERN_ERR "%s: %s Multimode Write " \
583 "multcount is not set\n",
584 drive->name, __func__);
588 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
591 cmd.protocol = ATA_PROT_PIO;
593 case TASKFILE_OUT_DMAQ:
594 case TASKFILE_OUT_DMA:
595 cmd.tf_flags |= IDE_TFLAG_WRITE;
596 nsect = taskout / SECTOR_SIZE;
599 case TASKFILE_MULTI_IN:
600 if (!drive->mult_count) {
601 /* (hs): give up if multcount is not set */
602 printk(KERN_ERR "%s: %s Multimode Read failure " \
603 "multcount is not set\n",
604 drive->name, __func__);
608 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
611 cmd.protocol = ATA_PROT_PIO;
613 case TASKFILE_IN_DMAQ:
614 case TASKFILE_IN_DMA:
615 nsect = taskin / SECTOR_SIZE;
618 case TASKFILE_NO_DATA:
619 cmd.protocol = ATA_PROT_NODATA;
626 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
629 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
632 printk(KERN_ERR "%s: in/out command without data\n",
639 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
641 memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
642 memcpy(req_task->io_ports, &cmd.tf, 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);