1#ifndef MMC_QUEUE_H 2#define MMC_QUEUE_H 3 4#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH) 5 6struct request; 7struct task_struct; 8 9struct mmc_blk_request { 10 struct mmc_request mrq; 11 struct mmc_command sbc; 12 struct mmc_command cmd; 13 struct mmc_command stop; 14 struct mmc_data data; 15}; 16 17enum mmc_packed_type { 18 MMC_PACKED_NONE = 0, 19 MMC_PACKED_WRITE, 20}; 21 22#define mmc_packed_cmd(type) ((type) != MMC_PACKED_NONE) 23#define mmc_packed_wr(type) ((type) == MMC_PACKED_WRITE) 24 25struct mmc_packed { 26 struct list_head list; 27 u32 cmd_hdr[1024]; 28 unsigned int blocks; 29 u8 nr_entries; 30 u8 retries; 31 s16 idx_failure; 32}; 33 34struct mmc_queue_req { 35 struct request *req; 36 struct mmc_blk_request brq; 37 struct scatterlist *sg; 38 char *bounce_buf; 39 struct scatterlist *bounce_sg; 40 unsigned int bounce_sg_len; 41 struct mmc_async_req mmc_active; 42 enum mmc_packed_type cmd_type; 43 struct mmc_packed *packed; 44}; 45 46struct mmc_queue { 47 struct mmc_card *card; 48 struct task_struct *thread; 49 struct semaphore thread_sem; 50 unsigned int flags; 51#define MMC_QUEUE_SUSPENDED (1 << 0) 52#define MMC_QUEUE_NEW_REQUEST (1 << 1) 53 54 int (*issue_fn)(struct mmc_queue *, struct request *); 55 void *data; 56 struct request_queue *queue; 57 struct mmc_queue_req mqrq[2]; 58 struct mmc_queue_req *mqrq_cur; 59 struct mmc_queue_req *mqrq_prev; 60}; 61 62extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *, 63 const char *); 64extern void mmc_cleanup_queue(struct mmc_queue *); 65extern void mmc_queue_suspend(struct mmc_queue *); 66extern void mmc_queue_resume(struct mmc_queue *); 67 68extern unsigned int mmc_queue_map_sg(struct mmc_queue *, 69 struct mmc_queue_req *); 70extern void mmc_queue_bounce_pre(struct mmc_queue_req *); 71extern void mmc_queue_bounce_post(struct mmc_queue_req *); 72 73extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *); 74extern void mmc_packed_clean(struct mmc_queue *); 75 76#endif 77