LXR linux/drivers/mmc/card/queue.h

   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        int                     retune_retry_done;
  16};
  17
  18enum mmc_packed_type {
  19        MMC_PACKED_NONE = 0,
  20        MMC_PACKED_WRITE,
  21};
  22
  23#define mmc_packed_cmd(type)    ((type) != MMC_PACKED_NONE)
  24#define mmc_packed_wr(type)     ((type) == MMC_PACKED_WRITE)
  25
  26struct mmc_packed {
  27        struct list_head        list;
  28        u32                     cmd_hdr[1024];
  29        unsigned int            blocks;
  30        u8                      nr_entries;
  31        u8                      retries;
  32        s16                     idx_failure;
  33};
  34
  35struct mmc_queue_req {
  36        struct request          *req;
  37        struct mmc_blk_request  brq;
  38        struct scatterlist      *sg;
  39        char                    *bounce_buf;
  40        struct scatterlist      *bounce_sg;
  41        unsigned int            bounce_sg_len;
  42        struct mmc_async_req    mmc_active;
  43        enum mmc_packed_type    cmd_type;
  44        struct mmc_packed       *packed;
  45};
  46
  47struct mmc_queue {
  48        struct mmc_card         *card;
  49        struct task_struct      *thread;
  50        struct semaphore        thread_sem;
  51        unsigned int            flags;
  52#define MMC_QUEUE_SUSPENDED     (1 << 0)
  53#define MMC_QUEUE_NEW_REQUEST   (1 << 1)
  54
  55        int                     (*issue_fn)(struct mmc_queue *, struct request *);
  56        void                    *data;
  57        struct request_queue    *queue;
  58        struct mmc_queue_req    mqrq[2];
  59        struct mmc_queue_req    *mqrq_cur;
  60        struct mmc_queue_req    *mqrq_prev;
  61};
  62
  63extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
  64                          const char *);
  65extern void mmc_cleanup_queue(struct mmc_queue *);
  66extern void mmc_queue_suspend(struct mmc_queue *);
  67extern void mmc_queue_resume(struct mmc_queue *);
  68
  69extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
  70                                     struct mmc_queue_req *);
  71extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
  72extern void mmc_queue_bounce_post(struct mmc_queue_req *);
  73
  74extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
  75extern void mmc_packed_clean(struct mmc_queue *);
  76
  77extern int mmc_access_rpmb(struct mmc_queue *);
  78
  79#endif
  80