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.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, tf);
83 tp_ops->set_irq(hwif, 1);
84 SELECT_MASK(drive, 0);
85 tp_ops->tf_load(drive, cmd);
88 switch (cmd->protocol) {
90 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
91 tp_ops->exec_command(hwif, tf->command);
92 ndelay(400); /* FIXME */
93 return pre_task_out_intr(drive, cmd);
95 handler = task_pio_intr;
99 handler = task_no_data_intr;
100 ide_execute_command(drive, tf->command, handler,
101 WAIT_WORSTCASE, NULL);
104 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
105 ide_build_sglist(drive, hwif->rq) == 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);
115 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
117 ide_hwif_t *hwif = drive->hwif;
118 struct ide_cmd *cmd = &hwif->cmd;
119 struct ide_taskfile *tf = &cmd->tf;
120 int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
121 int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
124 local_irq_enable_in_hardirq();
127 stat = hwif->tp_ops->read_status(hwif);
128 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
133 if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
134 if (custom && tf->command == ATA_CMD_SET_MULTI) {
135 drive->mult_req = drive->mult_count = 0;
136 drive->special.b.recalibrate = 1;
137 (void)ide_dump_status(drive, __func__, stat);
139 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
140 if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
141 ide_set_handler(drive, &task_no_data_intr,
142 WAIT_WORSTCASE, NULL);
146 return ide_error(drive, "task_no_data_intr", stat);
149 if (custom && tf->command == ATA_CMD_IDLEIMMEDIATE) {
150 hwif->tp_ops->tf_read(drive, cmd);
151 if (tf->lbal != 0xc4) {
152 printk(KERN_ERR "%s: head unload failed!\n",
154 ide_tf_dump(drive->name, tf);
156 drive->dev_flags |= IDE_DFLAG_PARKED;
157 } else if (custom && tf->command == ATA_CMD_SET_MULTI)
158 drive->mult_count = drive->mult_req;
160 if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE) {
161 struct request *rq = hwif->rq;
162 u8 err = ide_read_error(drive);
164 if (blk_pm_request(rq))
165 ide_complete_pm_rq(drive, rq);
167 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
168 ide_complete_cmd(drive, cmd, stat, err);
169 ide_complete_rq(drive, err);
176 static u8 wait_drive_not_busy(ide_drive_t *drive)
178 ide_hwif_t *hwif = drive->hwif;
183 * Last sector was transfered, wait until device is ready. This can
184 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
186 for (retries = 0; retries < 1000; retries++) {
187 stat = hwif->tp_ops->read_status(hwif);
196 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
201 static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
204 ide_hwif_t *hwif = drive->hwif;
205 struct scatterlist *sg = hwif->sg_table;
206 struct scatterlist *cursg = cmd->cursg;
208 #ifdef CONFIG_HIGHMEM
220 page = sg_page(cursg);
221 offset = cursg->offset + cmd->cursg_ofs * SECTOR_SIZE;
223 /* get the current page and offset */
224 page = nth_page(page, (offset >> PAGE_SHIFT));
227 #ifdef CONFIG_HIGHMEM
228 local_irq_save(flags);
230 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
235 if ((cmd->cursg_ofs * SECTOR_SIZE) == cursg->length) {
236 cmd->cursg = sg_next(cmd->cursg);
240 /* do the actual data transfer */
242 hwif->tp_ops->output_data(drive, cmd, buf, SECTOR_SIZE);
244 hwif->tp_ops->input_data(drive, cmd, buf, SECTOR_SIZE);
246 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
247 #ifdef CONFIG_HIGHMEM
248 local_irq_restore(flags);
252 static void ide_pio_multi(ide_drive_t *drive, struct ide_cmd *cmd,
257 nsect = min_t(unsigned int, cmd->nleft, drive->mult_count);
259 ide_pio_sector(drive, cmd, write);
262 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
265 u8 saved_io_32bit = drive->io_32bit;
267 if (cmd->tf_flags & IDE_TFLAG_FS)
270 if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
273 touch_softlockup_watchdog();
275 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
276 ide_pio_multi(drive, cmd, write);
278 ide_pio_sector(drive, cmd, write);
280 drive->io_32bit = saved_io_32bit;
283 static ide_startstop_t task_error(ide_drive_t *drive, struct ide_cmd *cmd,
284 const char *s, u8 stat)
286 if (cmd->tf_flags & IDE_TFLAG_FS) {
287 int sectors = cmd->nsect - cmd->nleft;
289 if (cmd->protocol == ATA_PROT_PIO &&
290 ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
291 if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
292 sectors -= drive->mult_count;
298 ide_end_request(drive, 1, sectors);
300 return ide_error(drive, s, stat);
303 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
305 if ((cmd->tf_flags & IDE_TFLAG_FS) == 0) {
306 u8 err = ide_read_error(drive);
308 ide_complete_cmd(drive, cmd, stat, err);
309 ide_complete_rq(drive, err);
313 ide_end_request(drive, 1, cmd->rq->nr_sectors);
317 * Handler for command with PIO data phase.
319 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
321 ide_hwif_t *hwif = drive->hwif;
322 struct ide_cmd *cmd = &drive->hwif->cmd;
323 u8 stat = hwif->tp_ops->read_status(hwif);
324 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
331 /* Didn't want any data? Odd. */
332 if ((stat & ATA_DRQ) == 0) {
333 /* Command all done? */
334 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
337 /* Assume it was a spurious irq */
341 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
344 /* Deal with unexpected ATA data phase. */
345 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
349 if (write && cmd->nleft == 0)
352 /* Still data left to transfer. */
353 ide_pio_datablock(drive, cmd, write);
355 /* Are we done? Check status and finish transfer. */
356 if (write == 0 && cmd->nleft == 0) {
357 stat = wait_drive_not_busy(drive);
358 if (!OK_STAT(stat, 0, BAD_STAT))
364 /* Still data left to transfer. */
365 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE, NULL);
368 ide_finish_cmd(drive, cmd, stat);
371 return task_error(drive, cmd, __func__, stat);
374 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
377 ide_startstop_t startstop;
379 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
380 drive->bad_wstat, WAIT_DRQ)) {
381 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
383 (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
384 (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
388 if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
391 ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE, NULL);
393 ide_pio_datablock(drive, cmd, 1);
398 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
404 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
405 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
409 * (ks) We transfer currently only whole sectors.
410 * This is suffient for now. But, it would be great,
411 * if we would find a solution to transfer any size.
412 * To support special commands like READ LONG.
414 rq->hard_nr_sectors = rq->nr_sectors = nsect;
415 rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
417 if (cmd->tf_flags & IDE_TFLAG_WRITE)
418 rq->cmd_flags |= REQ_RW;
423 error = blk_execute_rq(drive->queue, NULL, rq, 0);
429 EXPORT_SYMBOL(ide_raw_taskfile);
431 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
433 cmd->protocol = ATA_PROT_NODATA;
435 return ide_raw_taskfile(drive, cmd, NULL, 0);
437 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
439 #ifdef CONFIG_IDE_TASK_IOCTL
440 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
442 ide_task_request_t *req_task;
448 int tasksize = sizeof(struct ide_task_request_s);
449 unsigned int taskin = 0;
450 unsigned int taskout = 0;
452 char __user *buf = (char __user *)arg;
454 // printk("IDE Taskfile ...\n");
456 req_task = kzalloc(tasksize, GFP_KERNEL);
457 if (req_task == NULL) return -ENOMEM;
458 if (copy_from_user(req_task, buf, tasksize)) {
463 taskout = req_task->out_size;
464 taskin = req_task->in_size;
466 if (taskin > 65536 || taskout > 65536) {
472 int outtotal = tasksize;
473 outbuf = kzalloc(taskout, GFP_KERNEL);
474 if (outbuf == NULL) {
478 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
485 int intotal = tasksize + taskout;
486 inbuf = kzalloc(taskin, GFP_KERNEL);
491 if (copy_from_user(inbuf, buf + intotal, taskin)) {
497 memset(&cmd, 0, sizeof(cmd));
499 memcpy(&cmd.tf_array[0], req_task->hob_ports,
500 HDIO_DRIVE_HOB_HDR_SIZE - 2);
501 memcpy(&cmd.tf_array[6], req_task->io_ports,
502 HDIO_DRIVE_TASK_HDR_SIZE);
504 cmd.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
507 if (drive->dev_flags & IDE_DFLAG_LBA48)
508 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
510 if (req_task->out_flags.all) {
511 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
513 if (req_task->out_flags.b.data)
514 cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
516 if (req_task->out_flags.b.nsector_hob)
517 cmd.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
518 if (req_task->out_flags.b.sector_hob)
519 cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
520 if (req_task->out_flags.b.lcyl_hob)
521 cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
522 if (req_task->out_flags.b.hcyl_hob)
523 cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
525 if (req_task->out_flags.b.error_feature)
526 cmd.tf_flags |= IDE_TFLAG_OUT_FEATURE;
527 if (req_task->out_flags.b.nsector)
528 cmd.tf_flags |= IDE_TFLAG_OUT_NSECT;
529 if (req_task->out_flags.b.sector)
530 cmd.tf_flags |= IDE_TFLAG_OUT_LBAL;
531 if (req_task->out_flags.b.lcyl)
532 cmd.tf_flags |= IDE_TFLAG_OUT_LBAM;
533 if (req_task->out_flags.b.hcyl)
534 cmd.tf_flags |= IDE_TFLAG_OUT_LBAH;
536 cmd.tf_flags |= IDE_TFLAG_OUT_TF;
537 if (cmd.tf_flags & IDE_TFLAG_LBA48)
538 cmd.tf_flags |= IDE_TFLAG_OUT_HOB;
541 if (req_task->in_flags.b.data)
542 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
544 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
545 /* fixup data phase if needed */
546 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
547 req_task->data_phase == TASKFILE_IN_DMA)
548 cmd.tf_flags |= IDE_TFLAG_WRITE;
551 cmd.protocol = ATA_PROT_DMA;
553 switch (req_task->data_phase) {
554 case TASKFILE_MULTI_OUT:
555 if (!drive->mult_count) {
556 /* (hs): give up if multcount is not set */
557 printk(KERN_ERR "%s: %s Multimode Write " \
558 "multcount is not set\n",
559 drive->name, __func__);
563 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
566 cmd.protocol = ATA_PROT_PIO;
568 case TASKFILE_OUT_DMAQ:
569 case TASKFILE_OUT_DMA:
570 cmd.tf_flags |= IDE_TFLAG_WRITE;
571 nsect = taskout / SECTOR_SIZE;
574 case TASKFILE_MULTI_IN:
575 if (!drive->mult_count) {
576 /* (hs): give up if multcount is not set */
577 printk(KERN_ERR "%s: %s Multimode Read failure " \
578 "multcount is not set\n",
579 drive->name, __func__);
583 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
586 cmd.protocol = ATA_PROT_PIO;
588 case TASKFILE_IN_DMAQ:
589 case TASKFILE_IN_DMA:
590 nsect = taskin / SECTOR_SIZE;
593 case TASKFILE_NO_DATA:
594 cmd.protocol = ATA_PROT_NODATA;
601 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
604 nsect = (cmd.tf.hob_nsect << 8) | cmd.tf.nsect;
607 printk(KERN_ERR "%s: in/out command without data\n",
614 err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
616 memcpy(req_task->hob_ports, &cmd.tf_array[0],
617 HDIO_DRIVE_HOB_HDR_SIZE - 2);
618 memcpy(req_task->io_ports, &cmd.tf_array[6],
619 HDIO_DRIVE_TASK_HDR_SIZE);
621 if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
622 req_task->in_flags.all == 0) {
623 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
624 if (drive->dev_flags & IDE_DFLAG_LBA48)
625 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
628 if (copy_to_user(buf, req_task, tasksize)) {
633 int outtotal = tasksize;
634 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
640 int intotal = tasksize + taskout;
641 if (copy_to_user(buf + intotal, inbuf, taskin)) {
651 // printk("IDE Taskfile ioctl ended. rc = %i\n", err);