![Per Forlin](/assets/img/avatar_default.png)
Change mmc_blk_issue_rw_rq() to become asynchronous. The execution flow looks like this: * The mmc-queue calls issue_rw_rq(), which sends the request to the host and returns back to the mmc-queue. * The mmc-queue calls issue_rw_rq() again with a new request. * This new request is prepared in issue_rw_rq(), then it waits for the active request to complete before pushing it to the host. * When the mmc-queue is empty it will call issue_rw_rq() with a NULL req to finish off the active request without starting a new request. 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>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
#ifndef MMC_QUEUE_H
|
|
#define MMC_QUEUE_H
|
|
|
|
struct request;
|
|
struct task_struct;
|
|
|
|
struct mmc_blk_request {
|
|
struct mmc_request mrq;
|
|
struct mmc_command sbc;
|
|
struct mmc_command cmd;
|
|
struct mmc_command stop;
|
|
struct mmc_data data;
|
|
};
|
|
|
|
struct mmc_queue_req {
|
|
struct request *req;
|
|
struct mmc_blk_request brq;
|
|
struct scatterlist *sg;
|
|
char *bounce_buf;
|
|
struct scatterlist *bounce_sg;
|
|
unsigned int bounce_sg_len;
|
|
struct mmc_async_req mmc_active;
|
|
};
|
|
|
|
struct mmc_queue {
|
|
struct mmc_card *card;
|
|
struct task_struct *thread;
|
|
struct semaphore thread_sem;
|
|
unsigned int flags;
|
|
int (*issue_fn)(struct mmc_queue *, struct request *);
|
|
void *data;
|
|
struct request_queue *queue;
|
|
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 *,
|
|
const char *);
|
|
extern void mmc_cleanup_queue(struct mmc_queue *);
|
|
extern void mmc_queue_suspend(struct mmc_queue *);
|
|
extern void mmc_queue_resume(struct mmc_queue *);
|
|
|
|
extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
|
|
struct mmc_queue_req *);
|
|
extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
|
|
extern void mmc_queue_bounce_post(struct mmc_queue_req *);
|
|
|
|
#endif
|