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mmc: queue: add a second mmc queue request member

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Add an additional mmc queue request instance to make way for two active
block requests. One request may be active while the other request is
being prepared.

Signed-off-by: Per Forlin <per.forlin@linaro.org>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Venkatraman S <svenkatr@ti.com>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Per Forlin 2011-07-01 18:55:31 +02:00 committed by Chris Ball
parent d78d4a8ad5
commit 04296b7bfd
2 changed files with 44 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
drivers/mmc/card/queue.c
View file

@ -153,6 +153,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
u64 limit = BLK_BOUNCE_HIGH;
int ret;
struct mmc_queue_req *mqrq_cur = &mq->mqrq[0];
struct mmc_queue_req *mqrq_prev = &mq->mqrq[1];
if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
limit = *mmc_dev(host)->dma_mask;
@ -163,7 +164,9 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
return -ENOMEM;
memset(&mq->mqrq_cur, 0, sizeof(mq->mqrq_cur));
memset(&mq->mqrq_prev, 0, sizeof(mq->mqrq_prev));
mq->mqrq_cur = mqrq_cur;
mq->mqrq_prev = mqrq_prev;
mq->queue->queuedata = mq;
blk_queue_prep_rq(mq->queue, mmc_prep_request);
@ -191,9 +194,17 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
"allocate bounce cur buffer\n",
mmc_card_name(card));
}
mqrq_prev->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
if (!mqrq_prev->bounce_buf) {
printk(KERN_WARNING "%s: unable to "
"allocate bounce prev buffer\n",
mmc_card_name(card));
kfree(mqrq_cur->bounce_buf);
mqrq_cur->bounce_buf = NULL;
}
}
if (mqrq_cur->bounce_buf) {
if (mqrq_cur->bounce_buf && mqrq_prev->bounce_buf) {
blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
blk_queue_max_hw_sectors(mq->queue, bouncesz / 512);
blk_queue_max_segments(mq->queue, bouncesz / 512);
@ -208,11 +219,19 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
if (ret)
goto cleanup_queue;
mqrq_prev->sg = mmc_alloc_sg(1, &ret);
if (ret)
goto cleanup_queue;
mqrq_prev->bounce_sg =
mmc_alloc_sg(bouncesz / 512, &ret);
if (ret)
goto cleanup_queue;
}
}
#endif
if (!mqrq_cur->bounce_buf) {
if (!mqrq_cur->bounce_buf && !mqrq_prev->bounce_buf) {
blk_queue_bounce_limit(mq->queue, limit);
blk_queue_max_hw_sectors(mq->queue,
min(host->max_blk_count, host->max_req_size / 512));
@ -223,6 +242,10 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
if (ret)
goto cleanup_queue;
mqrq_prev->sg = mmc_alloc_sg(host->max_segs, &ret);
if (ret)
goto cleanup_queue;
}
sema_init(&mq->thread_sem, 1);
@ -239,6 +262,8 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
free_bounce_sg:
kfree(mqrq_cur->bounce_sg);
mqrq_cur->bounce_sg = NULL;
kfree(mqrq_prev->bounce_sg);
mqrq_prev->bounce_sg = NULL;
cleanup_queue:
kfree(mqrq_cur->sg);
@ -246,6 +271,11 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
kfree(mqrq_cur->bounce_buf);
mqrq_cur->bounce_buf = NULL;
kfree(mqrq_prev->sg);
mqrq_prev->sg = NULL;
kfree(mqrq_prev->bounce_buf);
mqrq_prev->bounce_buf = NULL;
blk_cleanup_queue(mq->queue);
return ret;
}
@ -255,6 +285,7 @@ void mmc_cleanup_queue(struct mmc_queue *mq)
struct request_queue *q = mq->queue;
unsigned long flags;
struct mmc_queue_req *mqrq_cur = mq->mqrq_cur;
struct mmc_queue_req *mqrq_prev = mq->mqrq_prev;
/* Make sure the queue isn't suspended, as that will deadlock */
mmc_queue_resume(mq);
@ -277,6 +308,15 @@ void mmc_cleanup_queue(struct mmc_queue *mq)
kfree(mqrq_cur->bounce_buf);
mqrq_cur->bounce_buf = NULL;
kfree(mqrq_prev->bounce_sg);
mqrq_prev->bounce_sg = NULL;
kfree(mqrq_prev->sg);
mqrq_prev->sg = NULL;
kfree(mqrq_prev->bounce_buf);
mqrq_prev->bounce_buf = NULL;
mq->card = NULL;
}
EXPORT_SYMBOL(mmc_cleanup_queue);

3
drivers/mmc/card/queue.h
View file

@ -29,8 +29,9 @@ struct mmc_queue {
int (*issue_fn)(struct mmc_queue *, struct request *);
void *data;
struct request_queue *queue;
struct mmc_queue_req mqrq[1];
struct mmc_queue_req mqrq[2];
struct mmc_queue_req *mqrq_cur;
struct mmc_queue_req *mqrq_prev;
};
extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,