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
   6 struct request;
   7 struct task_struct;
   8
   9 struct 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
  18 enum 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
  26 struct 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
  35 struct 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
  47 struct 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
  63 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
  64                           const char *);
  65 extern void mmc_cleanup_queue(struct mmc_queue *);
  66 extern void mmc_queue_suspend(struct mmc_queue *);
  67 extern void mmc_queue_resume(struct mmc_queue *);
  68
  69 extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
  70                                      struct mmc_queue_req *);
  71 extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
  72 extern void mmc_queue_bounce_post(struct mmc_queue_req *);
  73
  74 extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
  75 extern void mmc_packed_clean(struct mmc_queue *);
  76
  77 extern int mmc_access_rpmb(struct mmc_queue *);
  78
  79 #endif