forked from luck/tmp_suning_uos_patched
98ccf14909
Some hosts cannot do scatter/gather in hardware. Since not doing sg is such a big performance hit, we (optionally) bounce the requests to a simple linear buffer that we hand over to the driver. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
32 lines
849 B
C
32 lines
849 B
C
#ifndef MMC_QUEUE_H
|
|
#define MMC_QUEUE_H
|
|
|
|
struct request;
|
|
struct task_struct;
|
|
|
|
struct mmc_queue {
|
|
struct mmc_card *card;
|
|
struct task_struct *thread;
|
|
struct semaphore thread_sem;
|
|
unsigned int flags;
|
|
struct request *req;
|
|
int (*issue_fn)(struct mmc_queue *, struct request *);
|
|
void *data;
|
|
struct request_queue *queue;
|
|
struct scatterlist *sg;
|
|
char *bounce_buf;
|
|
struct scatterlist *bounce_sg;
|
|
unsigned int bounce_sg_len;
|
|
};
|
|
|
|
extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *);
|
|
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 *);
|
|
extern void mmc_queue_bounce_pre(struct mmc_queue *);
|
|
extern void mmc_queue_bounce_post(struct mmc_queue *);
|
|
|
|
#endif
|