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_cmd *cmd)
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, cmd->tf.feature, cmd->tf.nsect,
32 cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
33 cmd->tf.device, cmd->tf.command);
34 printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
35 s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
39 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
43 memset(&cmd, 0, sizeof(cmd));
45 if (drive->media == ide_disk)
46 cmd.tf.command = ATA_CMD_ID_ATA;
48 cmd.tf.command = ATA_CMD_ID_ATAPI;
49 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
50 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_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_pio_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, cmd);
83 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
84 SELECT_MASK(drive, 0);
86 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
87 u8 data[2] = { cmd->tf.data, cmd->hob.data };
89 tp_ops->output_data(drive, cmd, data, 2);
92 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
93 u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
96 if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
97 cmd->tf.device &= HIHI;
98 cmd->tf.device |= drive->select;
101 tp_ops->tf_load(drive, cmd);
104 switch (cmd->protocol) {
106 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
107 tp_ops->exec_command(hwif, tf->command);
108 ndelay(400); /* FIXME */
109 return pre_task_out_intr(drive, cmd);
111 handler = task_pio_intr;
113 case ATA_PROT_NODATA:
115 handler = task_no_data_intr;
116 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
119 if (ide_dma_prepare(drive, cmd))
121 hwif->expiry = dma_ops->dma_timer_expiry;
122 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
123 dma_ops->dma_start(drive);
128 EXPORT_SYMBOL_GPL(do_rw_taskfile);
130 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
132 ide_hwif_t *hwif = drive->hwif;
133 struct ide_cmd *cmd = &hwif->cmd;
134 struct ide_taskfile *tf = &cmd->tf;
135 int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
136 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
139 local_irq_enable_in_hardirq();
142 stat = hwif->tp_ops->read_status(hwif);
143 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
148 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
149 if (custom && tf->command == ATA_CMD_SET_MULTI) {
150 drive->mult_req = drive->mult_count = 0;
151 drive->special.b.recalibrate = 1;
152 (void)ide_dump_status(drive, __func__, stat);
154 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
155 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
156 ide_set_handler(drive, &task_no_data_intr,
161 return ide_error(drive, "task_no_data_intr", stat);
164 if (custom && tf->command == ATA_CMD_SET_MULTI)
165 drive->mult_count = drive->mult_req;
167 if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
168 tf->command == ATA_CMD_CHK_POWER) {
169 struct request *rq = hwif->rq;
171 if (blk_pm_request(rq))
172 ide_complete_pm_rq(drive, rq);
174 ide_finish_cmd(drive, cmd, stat);
180 static u8 wait_drive_not_busy(ide_drive_t *drive)
182 ide_hwif_t *hwif = drive->hwif;
187 * Last sector was transfered, wait until device is ready. This can
188 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
190 for (retries = 0; retries < 1000; retries++) {
191 stat = hwif->tp_ops->read_status(hwif);
200 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
205 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
206 unsigned int write, unsigned int len)
208 ide_hwif_t *hwif = drive->hwif;
209 struct scatterlist *sg = hwif->sg_table;
210 struct scatterlist *cursg = cmd->cursg;
218 cursg = cmd->cursg = sg;
221 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
223 if (nr_bytes > PAGE_SIZE)
224 nr_bytes = PAGE_SIZE;
226 page = sg_page(cursg);
227 offset = cursg->offset + cmd->cursg_ofs;
229 /* get the current page and offset */
230 page = nth_page(page, (offset >> PAGE_SHIFT));
233 if (PageHighMem(page))
234 local_irq_save(flags);
236 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
238 cmd->nleft -= nr_bytes;
239 cmd->cursg_ofs += nr_bytes;
241 if (cmd->cursg_ofs == cursg->length) {
242 cursg = cmd->cursg = sg_next(cmd->cursg);
246 /* do the actual data transfer */
248 hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
250 hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
252 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
254 if (PageHighMem(page))
255 local_irq_restore(flags);
260 EXPORT_SYMBOL_GPL(ide_pio_bytes);
262 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
265 unsigned int nr_bytes;
267 u8 saved_io_32bit = drive->io_32bit;
269 if (cmd->tf_flags & IDE_TFLAG_FS)
272 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
275 touch_softlockup_watchdog();
277 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
278 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
280 nr_bytes = SECTOR_SIZE;
282 ide_pio_bytes(drive, cmd, write, nr_bytes);
284 drive->io_32bit = saved_io_32bit;
287 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
289 if (cmd->tf_flags & IDE_TFLAG_FS) {
290 int nr_bytes = cmd->nbytes - cmd->nleft;
292 if (cmd->protocol == ATA_PROT_PIO &&
293 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
294 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
295 nr_bytes -= drive->mult_count << 9;
297 nr_bytes -= SECTOR_SIZE;
301 ide_complete_rq(drive, 0, nr_bytes);
305 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
307 struct request *rq = drive->hwif->rq;
308 u8 err = ide_read_error(drive);
310 ide_complete_cmd(drive, cmd, stat, err);
312 ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
316 * Handler for command with PIO data phase.
318 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
320 ide_hwif_t *hwif = drive->hwif;
321 struct ide_cmd *cmd = &drive->hwif->cmd;
322 u8 stat = hwif->tp_ops->read_status(hwif);
323 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
330 /* Didn't want any data? Odd. */
331 if ((stat & ATA_DRQ) == 0) {
332 /* Command all done? */
333 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
336 /* Assume it was a spurious irq */
340 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
343 /* Deal with unexpected ATA data phase. */
344 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
348 if (write && cmd->nleft == 0)
351 /* Still data left to transfer. */
352 ide_pio_datablock(drive, cmd, write);
354 /* Are we done? Check status and finish transfer. */
355 if (write == 0 && cmd->nleft == 0) {
356 stat = wait_drive_not_busy(drive);
357 if (!OK_STAT(stat, 0, BAD_STAT))
363 /* Still data left to transfer. */
364 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
367 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
368 ide_finish_cmd(drive, cmd, stat);
370 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
373 ide_error_cmd(drive, cmd);
374 return ide_error(drive, __func__, stat);
377 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
380 ide_startstop_t startstop;
382 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
383 drive->bad_wstat, WAIT_DRQ)) {
384 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
386 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
387 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
391 if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
394 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
396 ide_pio_datablock(drive, cmd, 1);
401 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
407 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
408 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
412 * (ks) We transfer currently only whole sectors.
413 * This is suffient for now. But, it would be great,
414 * if we would find a solution to transfer any size.
415 * To support special commands like READ LONG.
417 rq->hard_nr_sectors = rq->nr_sectors = nsect;
418 rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
420 if (cmd->tf_flags & IDE_TFLAG_WRITE)
421 rq->cmd_flags |= REQ_RW;
426 error = blk_execute_rq(drive->queue, NULL, rq, 0);
432 EXPORT_SYMBOL(ide_raw_taskfile);
434 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
436 cmd->protocol = ATA_PROT_NODATA;
438 return ide_raw_taskfile(drive, cmd, NULL, 0);
440 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
442 #ifdef CONFIG_IDE_TASK_IOCTL
443 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
445 ide_task_request_t *req_task;
451 int tasksize = sizeof(struct ide_task_request_s);
452 unsigned int taskin = 0;
453 unsigned int taskout = 0;
455 char __user *buf = (char __user *)arg;
457 // printk("IDE Taskfile ...\n");
459 req_task = kzalloc(tasksize, GFP_KERNEL);
460 if (req_task == NULL) return -ENOMEM;
461 if (copy_from_user(req_task, buf, tasksize)) {
466 taskout = req_task->out_size;
467 taskin = req_task->in_size;
469 if (taskin > 65536 || taskout > 65536) {
475 int outtotal = tasksize;
476 outbuf = kzalloc(taskout, GFP_KERNEL);
477 if (outbuf == NULL) {
481 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
488 int intotal = tasksize + taskout;
489 inbuf = kzalloc(taskin, GFP_KERNEL);
494 if (copy_from_user(inbuf, buf + intotal, taskin)) {
500 memset(&cmd, 0, sizeof(cmd));
502 memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
503 memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
505 cmd.valid.out.tf = IDE_VALID_DEVICE;
506 cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
507 cmd.tf_flags = IDE_TFLAG_IO_16BIT;
509 if (drive->dev_flags & IDE_DFLAG_LBA48) {
510 cmd.tf_flags |= IDE_TFLAG_LBA48;
511 cmd.valid.in.hob = IDE_VALID_IN_HOB;
514 if (req_task->out_flags.all) {
515 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
517 if (req_task->out_flags.b.data)
518 cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
520 if (req_task->out_flags.b.nsector_hob)
521 cmd.valid.out.hob |= IDE_VALID_NSECT;
522 if (req_task->out_flags.b.sector_hob)
523 cmd.valid.out.hob |= IDE_VALID_LBAL;
524 if (req_task->out_flags.b.lcyl_hob)
525 cmd.valid.out.hob |= IDE_VALID_LBAM;
526 if (req_task->out_flags.b.hcyl_hob)
527 cmd.valid.out.hob |= IDE_VALID_LBAH;
529 if (req_task->out_flags.b.error_feature)
530 cmd.valid.out.tf |= IDE_VALID_FEATURE;
531 if (req_task->out_flags.b.nsector)
532 cmd.valid.out.tf |= IDE_VALID_NSECT;
533 if (req_task->out_flags.b.sector)
534 cmd.valid.out.tf |= IDE_VALID_LBAL;
535 if (req_task->out_flags.b.lcyl)
536 cmd.valid.out.tf |= IDE_VALID_LBAM;
537 if (req_task->out_flags.b.hcyl)
538 cmd.valid.out.tf |= IDE_VALID_LBAH;
540 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
541 if (cmd.tf_flags & IDE_TFLAG_LBA48)
542 cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
545 if (req_task->in_flags.b.data)
546 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
548 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
549 /* fixup data phase if needed */
550 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
551 req_task->data_phase == TASKFILE_IN_DMA)
552 cmd.tf_flags |= IDE_TFLAG_WRITE;
555 cmd.protocol = ATA_PROT_DMA;
557 switch (req_task->data_phase) {
558 case TASKFILE_MULTI_OUT:
559 if (!drive->mult_count) {
560 /* (hs): give up if multcount is not set */
561 printk(KERN_ERR "%s: %s Multimode Write " \
562 "multcount is not set\n",
563 drive->name, __func__);
567 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
570 cmd.protocol = ATA_PROT_PIO;
572 case TASKFILE_OUT_DMAQ:
573 case TASKFILE_OUT_DMA:
574 cmd.tf_flags |= IDE_TFLAG_WRITE;
575 nsect = taskout / SECTOR_SIZE;
578 case TASKFILE_MULTI_IN:
579 if (!drive->mult_count) {
580 /* (hs): give up if multcount is not set */
581 printk(KERN_ERR "%s: %s Multimode Read failure " \
582 "multcount is not set\n",
583 drive->name, __func__);
587 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
590 cmd.protocol = ATA_PROT_PIO;
592 case TASKFILE_IN_DMAQ:
593 case TASKFILE_IN_DMA:
594 nsect = taskin / SECTOR_SIZE;
597 case TASKFILE_NO_DATA:
598 cmd.protocol = ATA_PROT_NODATA;
605 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
608 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
611 printk(KERN_ERR "%s: in/out command without data\n",
618 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
620 memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
621 memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE);
623 if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
624 req_task->in_flags.all == 0) {
625 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
626 if (drive->dev_flags & IDE_DFLAG_LBA48)
627 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
630 if (copy_to_user(buf, req_task, tasksize)) {
635 int outtotal = tasksize;
636 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
642 int intotal = tasksize + taskout;
643 if (copy_to_user(buf + intotal, inbuf, taskin)) {
653 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);