linux-imx

/*

 *  IDE I/O functions

 *

 *  Basic PIO and command management functionality.

 *

 * This code was split off from ide.c. See ide.c for history and original

 * copyrights.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the

 * Free Software Foundation; either version 2, or (at your option) any

 * later version.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * For the avoidance of doubt the "preferred form" of this code is one which

 * is in an open non patent encumbered format. Where cryptographic key signing

 * forms part of the process of creating an executable the information

 * including keys needed to generate an equivalently functional executable

 * are deemed to be part of the source code.

 */

#include <linux/module.h>

#include <linux/types.h>

#include <linux/string.h>

#include <linux/kernel.h>

#include <linux/timer.h>

#include <linux/mm.h>

#include <linux/interrupt.h>

#include <linux/major.h>

#include <linux/errno.h>

#include <linux/genhd.h>

#include <linux/blkpg.h>

#include <linux/slab.h>

#include <linux/init.h>

#include <linux/pci.h>

#include <linux/delay.h>

#include <linux/ide.h>

#include <linux/completion.h>

#include <linux/reboot.h>

#include <linux/cdrom.h>

#include <linux/seq_file.h>

#include <linux/device.h>

#include <linux/kmod.h>

#include <linux/scatterlist.h>

#include <linux/bitops.h>

​

#include <asm/byteorder.h>

#include <asm/irq.h>

#include <linux/uaccess.h>

#include <asm/io.h>

​

int ide_end_rq(ide_drive_t *drive, struct request *rq, blk_status_t error,

           unsigned int nr_bytes)

{

    /*

     * decide whether to reenable DMA -- 3 is a random magic for now,

     * if we DMA timeout more than 3 times, just stay in PIO

     */

    if ((drive->dev_flags & IDE_DFLAG_DMA_PIO_RETRY) &&

        drive->retry_pio <= 3) {

        drive->dev_flags &= ~IDE_DFLAG_DMA_PIO_RETRY;

        ide_dma_on(drive);

    }

​

    if (!blk_update_request(rq, error, nr_bytes)) {

        if (rq == drive->sense_rq) {

            drive->sense_rq = NULL;

            drive->sense_rq_active = false;

        }

​

        __blk_mq_end_request(rq, error);

        return 0;

    }

​

    return 1;

}

EXPORT_SYMBOL_GPL(ide_end_rq);

​

void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)

{

    const struct ide_tp_ops *tp_ops = drive->hwif->tp_ops;

    struct ide_taskfile *tf = &cmd->tf;

    struct request *rq = cmd->rq;

    u8 tf_cmd = tf->command;

​

    tf->error = err;

    tf->status = stat;