linux-imx

/*

 *  Copyright (C) 2003 Russell King, All Rights Reserved.

 *  Copyright 2006-2007 Pierre Ossman

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/blkdev.h>

#include <linux/freezer.h>

#include <linux/kthread.h>

#include <linux/scatterlist.h>

#include <linux/dma-mapping.h>

​

#include <linux/mmc/card.h>

#include <linux/mmc/host.h>

​

#include "queue.h"

#include "block.h"

#include "core.h"

#include "card.h"

#include "host.h"

​

static inline bool mmc_cqe_dcmd_busy(struct mmc_queue *mq)

{

    /* Allow only 1 DCMD at a time */

    return mq->in_flight[MMC_ISSUE_DCMD];

}

​

void mmc_cqe_check_busy(struct mmc_queue *mq)

{

    if ((mq->cqe_busy & MMC_CQE_DCMD_BUSY) && !mmc_cqe_dcmd_busy(mq))

        mq->cqe_busy &= ~MMC_CQE_DCMD_BUSY;

​

    mq->cqe_busy &= ~MMC_CQE_QUEUE_FULL;

}

​

static inline bool mmc_cqe_can_dcmd(struct mmc_host *host)

{

    return host->caps2 & MMC_CAP2_CQE_DCMD;

}

​

static enum mmc_issue_type mmc_cqe_issue_type(struct mmc_host *host,

                          struct request *req)

{

    switch (req_op(req)) {

    case REQ_OP_DRV_IN:

    case REQ_OP_DRV_OUT:

    case REQ_OP_DISCARD:

    case REQ_OP_SECURE_ERASE:

        return MMC_ISSUE_SYNC;

    case REQ_OP_FLUSH:

        return mmc_cqe_can_dcmd(host) ? MMC_ISSUE_DCMD : MMC_ISSUE_SYNC;

    default:

        return MMC_ISSUE_ASYNC;

    }

}

​

enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req)

{