forked from luck/tmp_suning_uos_patched
c152cc1a90
* Move IDE{FLOPPY,TAPE}_ERROR_* defines to <linux/ide.h> and rename them to IDE_DRV_ERROR_*. * Handle ->end_request special cases for floppy/tape media in ide_kill_rq(). * Call ->end_request only for private device driver requests. There should be no functional changes caused by this patch. Acked-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
685 lines
17 KiB
C
685 lines
17 KiB
C
/*
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* Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
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* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
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* Copyright (C) 2001-2002 Klaus Smolin
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* IBM Storage Technology Division
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* Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz
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*
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* The big the bad and the ugly.
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*/
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/hdreg.h>
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#include <linux/ide.h>
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#include <linux/scatterlist.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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void ide_tf_dump(const char *s, struct ide_taskfile *tf)
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{
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#ifdef DEBUG
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printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
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"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
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s, tf->feature, tf->nsect, tf->lbal,
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tf->lbam, tf->lbah, tf->device, tf->command);
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printk("%s: hob: nsect 0x%02x lbal 0x%02x "
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"lbam 0x%02x lbah 0x%02x\n",
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s, tf->hob_nsect, tf->hob_lbal,
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tf->hob_lbam, tf->hob_lbah);
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#endif
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}
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int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
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{
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ide_task_t args;
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memset(&args, 0, sizeof(ide_task_t));
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args.tf.nsect = 0x01;
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if (drive->media == ide_disk)
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args.tf.command = ATA_CMD_ID_ATA;
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else
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args.tf.command = ATA_CMD_ID_ATAPI;
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args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
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args.data_phase = TASKFILE_IN;
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return ide_raw_taskfile(drive, &args, buf, 1);
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}
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static ide_startstop_t task_no_data_intr(ide_drive_t *);
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static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
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static ide_startstop_t task_in_intr(ide_drive_t *);
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ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct ide_taskfile *tf = &task->tf;
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ide_handler_t *handler = NULL;
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const struct ide_tp_ops *tp_ops = hwif->tp_ops;
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const struct ide_dma_ops *dma_ops = hwif->dma_ops;
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if (task->data_phase == TASKFILE_MULTI_IN ||
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task->data_phase == TASKFILE_MULTI_OUT) {
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if (!drive->mult_count) {
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printk(KERN_ERR "%s: multimode not set!\n",
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drive->name);
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return ide_stopped;
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}
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}
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if (task->ftf_flags & IDE_FTFLAG_FLAGGED)
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task->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
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memcpy(&hwif->task, task, sizeof(*task));
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if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
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ide_tf_dump(drive->name, tf);
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tp_ops->set_irq(hwif, 1);
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SELECT_MASK(drive, 0);
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tp_ops->tf_load(drive, task);
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}
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switch (task->data_phase) {
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case TASKFILE_MULTI_OUT:
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case TASKFILE_OUT:
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tp_ops->exec_command(hwif, tf->command);
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ndelay(400); /* FIXME */
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return pre_task_out_intr(drive, task->rq);
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case TASKFILE_MULTI_IN:
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case TASKFILE_IN:
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handler = task_in_intr;
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/* fall-through */
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case TASKFILE_NO_DATA:
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if (handler == NULL)
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handler = task_no_data_intr;
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ide_execute_command(drive, tf->command, handler,
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WAIT_WORSTCASE, NULL);
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return ide_started;
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default:
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if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
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dma_ops->dma_setup(drive))
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return ide_stopped;
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dma_ops->dma_exec_cmd(drive, tf->command);
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dma_ops->dma_start(drive);
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return ide_started;
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}
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}
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EXPORT_SYMBOL_GPL(do_rw_taskfile);
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/*
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* Handler for commands without a data phase
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*/
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static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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ide_task_t *task = &hwif->task;
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struct ide_taskfile *tf = &task->tf;
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int custom = (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
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int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
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u8 stat;
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local_irq_enable_in_hardirq();
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while (1) {
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stat = hwif->tp_ops->read_status(hwif);
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if ((stat & ATA_BUSY) == 0 || retries-- == 0)
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break;
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udelay(10);
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};
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if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
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if (custom && tf->command == ATA_CMD_SET_MULTI) {
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drive->mult_req = drive->mult_count = 0;
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drive->special.b.recalibrate = 1;
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(void)ide_dump_status(drive, __func__, stat);
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return ide_stopped;
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} else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
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if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
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ide_set_handler(drive, &task_no_data_intr,
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WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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}
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return ide_error(drive, "task_no_data_intr", stat);
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}
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if (custom && tf->command == ATA_CMD_IDLEIMMEDIATE) {
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hwif->tp_ops->tf_read(drive, task);
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if (tf->lbal != 0xc4) {
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printk(KERN_ERR "%s: head unload failed!\n",
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drive->name);
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ide_tf_dump(drive->name, tf);
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} else
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drive->dev_flags |= IDE_DFLAG_PARKED;
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} else if (custom && tf->command == ATA_CMD_SET_MULTI)
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drive->mult_count = drive->mult_req;
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if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE) {
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struct request *rq = hwif->rq;
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u8 err = ide_read_error(drive);
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if (blk_pm_request(rq))
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ide_complete_pm_rq(drive, rq);
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else {
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if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
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ide_complete_task(drive, task, stat, err);
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ide_complete_rq(drive, err);
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}
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}
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return ide_stopped;
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}
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static u8 wait_drive_not_busy(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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int retries;
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u8 stat;
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/*
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* Last sector was transfered, wait until device is ready. This can
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* take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
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*/
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for (retries = 0; retries < 1000; retries++) {
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stat = hwif->tp_ops->read_status(hwif);
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if (stat & ATA_BUSY)
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udelay(10);
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else
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break;
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}
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if (stat & ATA_BUSY)
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printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
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return stat;
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}
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static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
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unsigned int write)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct scatterlist *sg = hwif->sg_table;
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struct scatterlist *cursg = hwif->cursg;
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struct page *page;
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#ifdef CONFIG_HIGHMEM
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unsigned long flags;
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#endif
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unsigned int offset;
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u8 *buf;
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cursg = hwif->cursg;
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if (!cursg) {
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cursg = sg;
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hwif->cursg = sg;
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}
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page = sg_page(cursg);
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offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
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/* get the current page and offset */
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page = nth_page(page, (offset >> PAGE_SHIFT));
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offset %= PAGE_SIZE;
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#ifdef CONFIG_HIGHMEM
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local_irq_save(flags);
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#endif
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buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
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hwif->nleft--;
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hwif->cursg_ofs++;
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if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
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hwif->cursg = sg_next(hwif->cursg);
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hwif->cursg_ofs = 0;
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}
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/* do the actual data transfer */
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if (write)
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hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
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else
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hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
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kunmap_atomic(buf, KM_BIO_SRC_IRQ);
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#ifdef CONFIG_HIGHMEM
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local_irq_restore(flags);
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#endif
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}
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static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
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unsigned int write)
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{
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unsigned int nsect;
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nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
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while (nsect--)
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ide_pio_sector(drive, rq, write);
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}
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static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
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unsigned int write)
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{
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ide_task_t *task = &drive->hwif->task;
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u8 saved_io_32bit = drive->io_32bit;
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if (rq->bio) /* fs request */
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rq->errors = 0;
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if (task->tf_flags & IDE_TFLAG_IO_16BIT)
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drive->io_32bit = 0;
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touch_softlockup_watchdog();
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switch (task->data_phase) {
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case TASKFILE_MULTI_IN:
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case TASKFILE_MULTI_OUT:
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ide_pio_multi(drive, rq, write);
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break;
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default:
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ide_pio_sector(drive, rq, write);
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break;
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}
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drive->io_32bit = saved_io_32bit;
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}
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static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
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const char *s, u8 stat)
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{
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if (rq->bio) {
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ide_hwif_t *hwif = drive->hwif;
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ide_task_t *task = &hwif->task;
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int sectors = hwif->nsect - hwif->nleft;
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switch (task->data_phase) {
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case TASKFILE_IN:
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if (hwif->nleft)
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break;
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/* fall through */
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case TASKFILE_OUT:
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sectors--;
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break;
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case TASKFILE_MULTI_IN:
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if (hwif->nleft)
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break;
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/* fall through */
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case TASKFILE_MULTI_OUT:
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sectors -= drive->mult_count;
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default:
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break;
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}
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if (sectors > 0)
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ide_end_request(drive, 1, sectors);
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}
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return ide_error(drive, s, stat);
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}
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void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
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{
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if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
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ide_task_t *task = rq->special;
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u8 err = ide_read_error(drive);
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if (task)
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ide_complete_task(drive, task, stat, err);
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ide_complete_rq(drive, err);
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return;
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}
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ide_end_request(drive, 1, rq->nr_sectors);
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}
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/*
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* We got an interrupt on a task_in case, but no errors and no DRQ.
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*
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* It might be a spurious irq (shared irq), but it might be a
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* command that had no output.
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*/
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static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
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{
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/* Command all done? */
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if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
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task_end_request(drive, rq, stat);
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return ide_stopped;
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}
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/* Assume it was a spurious irq */
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ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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/*
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* Handler for command with PIO data-in phase (Read/Read Multiple).
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*/
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static ide_startstop_t task_in_intr(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct request *rq = hwif->rq;
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u8 stat = hwif->tp_ops->read_status(hwif);
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/* Error? */
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if (stat & ATA_ERR)
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return task_error(drive, rq, __func__, stat);
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/* Didn't want any data? Odd. */
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if ((stat & ATA_DRQ) == 0)
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return task_in_unexpected(drive, rq, stat);
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ide_pio_datablock(drive, rq, 0);
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/* Are we done? Check status and finish transfer. */
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if (!hwif->nleft) {
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stat = wait_drive_not_busy(drive);
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if (!OK_STAT(stat, 0, BAD_STAT))
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return task_error(drive, rq, __func__, stat);
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task_end_request(drive, rq, stat);
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return ide_stopped;
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}
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/* Still data left to transfer. */
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ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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/*
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* Handler for command with PIO data-out phase (Write/Write Multiple).
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*/
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static ide_startstop_t task_out_intr (ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct request *rq = hwif->rq;
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u8 stat = hwif->tp_ops->read_status(hwif);
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if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
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return task_error(drive, rq, __func__, stat);
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/* Deal with unexpected ATA data phase. */
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if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
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return task_error(drive, rq, __func__, stat);
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if (!hwif->nleft) {
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task_end_request(drive, rq, stat);
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return ide_stopped;
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}
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/* Still data left to transfer. */
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ide_pio_datablock(drive, rq, 1);
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ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
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return ide_started;
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}
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static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
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{
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ide_task_t *task = &drive->hwif->task;
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ide_startstop_t startstop;
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if (ide_wait_stat(&startstop, drive, ATA_DRQ,
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drive->bad_wstat, WAIT_DRQ)) {
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printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
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drive->name,
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task->data_phase == TASKFILE_MULTI_OUT ? "MULT" : "",
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(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
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return startstop;
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}
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if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
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local_irq_disable();
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ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
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ide_pio_datablock(drive, rq, 1);
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return ide_started;
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}
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int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
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{
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struct request *rq;
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int error;
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rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
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rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
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rq->buffer = buf;
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/*
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* (ks) We transfer currently only whole sectors.
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* This is suffient for now. But, it would be great,
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* if we would find a solution to transfer any size.
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* To support special commands like READ LONG.
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*/
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rq->hard_nr_sectors = rq->nr_sectors = nsect;
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rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
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if (task->tf_flags & IDE_TFLAG_WRITE)
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rq->cmd_flags |= REQ_RW;
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rq->special = task;
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task->rq = rq;
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error = blk_execute_rq(drive->queue, NULL, rq, 0);
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blk_put_request(rq);
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return error;
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}
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EXPORT_SYMBOL(ide_raw_taskfile);
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int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
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{
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task->data_phase = TASKFILE_NO_DATA;
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return ide_raw_taskfile(drive, task, NULL, 0);
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}
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EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
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#ifdef CONFIG_IDE_TASK_IOCTL
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int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
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{
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ide_task_request_t *req_task;
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ide_task_t args;
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u8 *outbuf = NULL;
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u8 *inbuf = NULL;
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u8 *data_buf = NULL;
|
|
int err = 0;
|
|
int tasksize = sizeof(struct ide_task_request_s);
|
|
unsigned int taskin = 0;
|
|
unsigned int taskout = 0;
|
|
u16 nsect = 0;
|
|
char __user *buf = (char __user *)arg;
|
|
|
|
// printk("IDE Taskfile ...\n");
|
|
|
|
req_task = kzalloc(tasksize, GFP_KERNEL);
|
|
if (req_task == NULL) return -ENOMEM;
|
|
if (copy_from_user(req_task, buf, tasksize)) {
|
|
kfree(req_task);
|
|
return -EFAULT;
|
|
}
|
|
|
|
taskout = req_task->out_size;
|
|
taskin = req_task->in_size;
|
|
|
|
if (taskin > 65536 || taskout > 65536) {
|
|
err = -EINVAL;
|
|
goto abort;
|
|
}
|
|
|
|
if (taskout) {
|
|
int outtotal = tasksize;
|
|
outbuf = kzalloc(taskout, GFP_KERNEL);
|
|
if (outbuf == NULL) {
|
|
err = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
if (copy_from_user(outbuf, buf + outtotal, taskout)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
if (taskin) {
|
|
int intotal = tasksize + taskout;
|
|
inbuf = kzalloc(taskin, GFP_KERNEL);
|
|
if (inbuf == NULL) {
|
|
err = -ENOMEM;
|
|
goto abort;
|
|
}
|
|
if (copy_from_user(inbuf, buf + intotal, taskin)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
|
|
memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
|
|
memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
|
|
|
|
args.data_phase = req_task->data_phase;
|
|
|
|
args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
|
|
IDE_TFLAG_IN_TF;
|
|
if (drive->dev_flags & IDE_DFLAG_LBA48)
|
|
args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
|
|
|
|
if (req_task->out_flags.all) {
|
|
args.ftf_flags |= IDE_FTFLAG_FLAGGED;
|
|
|
|
if (req_task->out_flags.b.data)
|
|
args.ftf_flags |= IDE_FTFLAG_OUT_DATA;
|
|
|
|
if (req_task->out_flags.b.nsector_hob)
|
|
args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
|
|
if (req_task->out_flags.b.sector_hob)
|
|
args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
|
|
if (req_task->out_flags.b.lcyl_hob)
|
|
args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
|
|
if (req_task->out_flags.b.hcyl_hob)
|
|
args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
|
|
|
|
if (req_task->out_flags.b.error_feature)
|
|
args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
|
|
if (req_task->out_flags.b.nsector)
|
|
args.tf_flags |= IDE_TFLAG_OUT_NSECT;
|
|
if (req_task->out_flags.b.sector)
|
|
args.tf_flags |= IDE_TFLAG_OUT_LBAL;
|
|
if (req_task->out_flags.b.lcyl)
|
|
args.tf_flags |= IDE_TFLAG_OUT_LBAM;
|
|
if (req_task->out_flags.b.hcyl)
|
|
args.tf_flags |= IDE_TFLAG_OUT_LBAH;
|
|
} else {
|
|
args.tf_flags |= IDE_TFLAG_OUT_TF;
|
|
if (args.tf_flags & IDE_TFLAG_LBA48)
|
|
args.tf_flags |= IDE_TFLAG_OUT_HOB;
|
|
}
|
|
|
|
if (req_task->in_flags.b.data)
|
|
args.ftf_flags |= IDE_FTFLAG_IN_DATA;
|
|
|
|
switch(req_task->data_phase) {
|
|
case TASKFILE_MULTI_OUT:
|
|
if (!drive->mult_count) {
|
|
/* (hs): give up if multcount is not set */
|
|
printk(KERN_ERR "%s: %s Multimode Write " \
|
|
"multcount is not set\n",
|
|
drive->name, __func__);
|
|
err = -EPERM;
|
|
goto abort;
|
|
}
|
|
/* fall through */
|
|
case TASKFILE_OUT:
|
|
/* fall through */
|
|
case TASKFILE_OUT_DMAQ:
|
|
case TASKFILE_OUT_DMA:
|
|
nsect = taskout / SECTOR_SIZE;
|
|
data_buf = outbuf;
|
|
break;
|
|
case TASKFILE_MULTI_IN:
|
|
if (!drive->mult_count) {
|
|
/* (hs): give up if multcount is not set */
|
|
printk(KERN_ERR "%s: %s Multimode Read failure " \
|
|
"multcount is not set\n",
|
|
drive->name, __func__);
|
|
err = -EPERM;
|
|
goto abort;
|
|
}
|
|
/* fall through */
|
|
case TASKFILE_IN:
|
|
/* fall through */
|
|
case TASKFILE_IN_DMAQ:
|
|
case TASKFILE_IN_DMA:
|
|
nsect = taskin / SECTOR_SIZE;
|
|
data_buf = inbuf;
|
|
break;
|
|
case TASKFILE_NO_DATA:
|
|
break;
|
|
default:
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
|
|
if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
|
|
nsect = 0;
|
|
else if (!nsect) {
|
|
nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
|
|
|
|
if (!nsect) {
|
|
printk(KERN_ERR "%s: in/out command without data\n",
|
|
drive->name);
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
|
|
if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
|
|
args.tf_flags |= IDE_TFLAG_WRITE;
|
|
|
|
err = ide_raw_taskfile(drive, &args, data_buf, nsect);
|
|
|
|
memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
|
|
memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
|
|
|
|
if ((args.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
|
|
req_task->in_flags.all == 0) {
|
|
req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
|
|
if (drive->dev_flags & IDE_DFLAG_LBA48)
|
|
req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
|
|
}
|
|
|
|
if (copy_to_user(buf, req_task, tasksize)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
if (taskout) {
|
|
int outtotal = tasksize;
|
|
if (copy_to_user(buf + outtotal, outbuf, taskout)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
if (taskin) {
|
|
int intotal = tasksize + taskout;
|
|
if (copy_to_user(buf + intotal, inbuf, taskin)) {
|
|
err = -EFAULT;
|
|
goto abort;
|
|
}
|
|
}
|
|
abort:
|
|
kfree(req_task);
|
|
kfree(outbuf);
|
|
kfree(inbuf);
|
|
|
|
// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
|
|
|
|
return err;
|
|
}
|
|
#endif
|