mmc: Move queue functions to mmc_block

The mmc block queue functions are tailored for the mmc_block
driver, so move those functions into that module.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 0 insertions, 250 deletions

diff --git a/drivers/mmc/mmc_queue.c b/drivers/mmc/mmc_queue.c
deleted file mode 100644
index c27e42645cdb..000000000000
--- a/drivers/mmc/mmc_queue.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- *  linux/drivers/mmc/mmc_queue.c
- *
- *  Copyright (C) 2003 Russell King, All Rights Reserved.
- *
- * 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/module.h>
-#include <linux/blkdev.h>
-#include <linux/kthread.h>
-
-#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
-#include "mmc_queue.h"
-
-#define MMC_QUEUE_SUSPENDED     (1 << 0)
-
-/*
- * Prepare a MMC request.  Essentially, this means passing the
- * preparation off to the media driver.  The media driver will
- * create a mmc_io_request in req->special.
- */
-static int mmc_prep_request(struct request_queue *q, struct request *req)
-{
-        struct mmc_queue *mq = q->queuedata;
-        int ret = BLKPREP_KILL;
-
-        if (blk_special_request(req)) {
-                /*
-                 * Special commands already have the command
-                 * blocks already setup in req->special.
-                 */
-                BUG_ON(!req->special);
-
-                ret = BLKPREP_OK;
-        } else if (blk_fs_request(req) || blk_pc_request(req)) {
-                /*
-                 * Block I/O requests need translating according
-                 * to the protocol.
-                 */
-                ret = mq->prep_fn(mq, req);
-        } else {
-                /*
-                 * Everything else is invalid.
-                 */
-                blk_dump_rq_flags(req, "MMC bad request");
-        }
-
-        if (ret == BLKPREP_OK)
-                req->cmd_flags |= REQ_DONTPREP;
-
-        return ret;
-}
-
-static int mmc_queue_thread(void *d)
-{
-        struct mmc_queue *mq = d;
-        struct request_queue *q = mq->queue;
-
-        /*
-         * Set iothread to ensure that we aren't put to sleep by
-         * the process freezing.  We handle suspension ourselves.
-         */
-        current->flags |= PF_MEMALLOC|PF_NOFREEZE;
-
-        down(&mq->thread_sem);
-        do {
-                struct request *req = NULL;
-
-                spin_lock_irq(q->queue_lock);
-                set_current_state(TASK_INTERRUPTIBLE);
-                if (!blk_queue_plugged(q))
-                        req = elv_next_request(q);
-                mq->req = req;
-                spin_unlock_irq(q->queue_lock);
-
-                if (!req) {
-                        if (kthread_should_stop()) {
-                                set_current_state(TASK_RUNNING);
-                                break;
-                        }
-                        up(&mq->thread_sem);
-                        schedule();
-                        down(&mq->thread_sem);
-                        continue;
-                }
-                set_current_state(TASK_RUNNING);
-
-                mq->issue_fn(mq, req);
-        } while (1);
-        up(&mq->thread_sem);
-
-        return 0;
-}
-
-/*
- * Generic MMC request handler.  This is called for any queue on a
- * particular host.  When the host is not busy, we look for a request
- * on any queue on this host, and attempt to issue it.  This may
- * not be the queue we were asked to process.
- */
-static void mmc_request(request_queue_t *q)
-{
-        struct mmc_queue *mq = q->queuedata;
-        struct request *req;
-        int ret;
-
-        if (!mq) {
-                printk(KERN_ERR "MMC: killing requests for dead queue\n");
-                while ((req = elv_next_request(q)) != NULL) {
-                        do {
-                                ret = end_that_request_chunk(req, 0,
-                                        req->current_nr_sectors << 9);
-                        } while (ret);
-                }
-                return;
-        }
-
-        if (!mq->req)
-                wake_up_process(mq->thread);
-}
-
-/**
- * mmc_init_queue - initialise a queue structure.
- * @mq: mmc queue
- * @card: mmc card to attach this queue
- * @lock: queue lock
- *
- * Initialise a MMC card request queue.
- */
-int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock)
-{
-        struct mmc_host *host = card->host;
-        u64 limit = BLK_BOUNCE_HIGH;
-        int ret;
-
-        if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
-                limit = *mmc_dev(host)->dma_mask;
-
-        mq->card = card;
-        mq->queue = blk_init_queue(mmc_request, lock);
-        if (!mq->queue)
-                return -ENOMEM;
-
-        blk_queue_prep_rq(mq->queue, mmc_prep_request);
-        blk_queue_bounce_limit(mq->queue, limit);
-        blk_queue_max_sectors(mq->queue, host->max_req_size / 512);
-        blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
-        blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
-        blk_queue_max_segment_size(mq->queue, host->max_seg_size);
-
-        mq->queue->queuedata = mq;
-        mq->req = NULL;
-
-        mq->sg = kmalloc(sizeof(struct scatterlist) * host->max_phys_segs,
-                         GFP_KERNEL);
-        if (!mq->sg) {
-                ret = -ENOMEM;
-                goto cleanup_queue;
-        }
-
-        init_MUTEX(&mq->thread_sem);
-
-        mq->thread = kthread_run(mmc_queue_thread, mq, "mmcqd");
-        if (IS_ERR(mq->thread)) {
-                ret = PTR_ERR(mq->thread);
-                goto free_sg;
-        }
-
-        return 0;
-
- free_sg:
-        kfree(mq->sg);
-        mq->sg = NULL;
- cleanup_queue:
-        blk_cleanup_queue(mq->queue);
-        return ret;
-}
-EXPORT_SYMBOL(mmc_init_queue);
-
-void mmc_cleanup_queue(struct mmc_queue *mq)
-{
-        request_queue_t *q = mq->queue;
-        unsigned long flags;
-
-        /* Mark that we should start throwing out stragglers */
-        spin_lock_irqsave(q->queue_lock, flags);
-        q->queuedata = NULL;
-        spin_unlock_irqrestore(q->queue_lock, flags);
-
-        /* Then terminate our worker thread */
-        kthread_stop(mq->thread);
-
-        kfree(mq->sg);
-        mq->sg = NULL;
-
-        blk_cleanup_queue(mq->queue);
-
-        mq->card = NULL;
-}
-EXPORT_SYMBOL(mmc_cleanup_queue);
-
-/**
- * mmc_queue_suspend - suspend a MMC request queue
- * @mq: MMC queue to suspend
- *
- * Stop the block request queue, and wait for our thread to
- * complete any outstanding requests.  This ensures that we
- * won't suspend while a request is being processed.
- */
-void mmc_queue_suspend(struct mmc_queue *mq)
-{
-        request_queue_t *q = mq->queue;
-        unsigned long flags;
-
-        if (!(mq->flags & MMC_QUEUE_SUSPENDED)) {
-                mq->flags |= MMC_QUEUE_SUSPENDED;
-
-                spin_lock_irqsave(q->queue_lock, flags);
-                blk_stop_queue(q);
-                spin_unlock_irqrestore(q->queue_lock, flags);
-
-                down(&mq->thread_sem);
-        }
-}
-EXPORT_SYMBOL(mmc_queue_suspend);
-
-/**
- * mmc_queue_resume - resume a previously suspended MMC request queue
- * @mq: MMC queue to resume
- */
-void mmc_queue_resume(struct mmc_queue *mq)
-{
-        request_queue_t *q = mq->queue;
-        unsigned long flags;
-
-        if (mq->flags & MMC_QUEUE_SUSPENDED) {
-                mq->flags &= ~MMC_QUEUE_SUSPENDED;
-
-                up(&mq->thread_sem);
-
-                spin_lock_irqsave(q->queue_lock, flags);
-                blk_start_queue(q);
-                spin_unlock_irqrestore(q->queue_lock, flags);
-        }
-}
-EXPORT_SYMBOL(mmc_queue_resume);