drivers/mmc/card/queue.h

   1 #ifndef MMC_QUEUE_H
   2 #define MMC_QUEUE_H
   3
   4 static inline bool mmc_req_is_special(struct request *req)
   5 {
   6         return req &&
   7                 (req_op(req) == REQ_OP_FLUSH || req_op(req) == REQ_OP_DISCARD);
   8 }
   9
  10 struct request;
  11 struct task_struct;
  12
  13 struct mmc_blk_request {
  14         struct mmc_request      mrq;
  15         struct mmc_command      sbc;
  16         struct mmc_command      cmd;
  17         struct mmc_command      stop;
  18         struct mmc_data         data;
  19         int                     retune_retry_done;
  20 };
  21
  22 enum mmc_packed_type {
  23         MMC_PACKED_NONE = 0,
  24         MMC_PACKED_WRITE,
  25 };
  26
  27 #define mmc_packed_cmd(type)    ((type) != MMC_PACKED_NONE)
  28 #define mmc_packed_wr(type)     ((type) == MMC_PACKED_WRITE)
  29
  30 struct mmc_packed {
  31         struct list_head        list;
  32         u32                     cmd_hdr[1024];
  33         unsigned int            blocks;
  34         u8                      nr_entries;
  35         u8                      retries;
  36         s16                     idx_failure;
  37 };
  38
  39 struct mmc_queue_req {
  40         struct request          *req;
  41         struct mmc_blk_request  brq;
  42         struct scatterlist      *sg;
  43         char                    *bounce_buf;
  44         struct scatterlist      *bounce_sg;
  45         unsigned int            bounce_sg_len;
  46         struct mmc_async_req    mmc_active;
  47         enum mmc_packed_type    cmd_type;
  48         struct mmc_packed       *packed;
  49 };
  50
  51 struct mmc_queue {
  52         struct mmc_card         *card;
  53         struct task_struct      *thread;
  54         struct semaphore        thread_sem;
  55         unsigned int            flags;
  56 #define MMC_QUEUE_SUSPENDED     (1 << 0)
  57 #define MMC_QUEUE_NEW_REQUEST   (1 << 1)
  58
  59         int                     (*issue_fn)(struct mmc_queue *, struct request *);
  60         void                    *data;
  61         struct request_queue    *queue;
  62         struct mmc_queue_req    mqrq[2];
  63         struct mmc_queue_req    *mqrq_cur;
  64         struct mmc_queue_req    *mqrq_prev;
  65 };
  66
  67 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
  68                           const char *);
  69 extern void mmc_cleanup_queue(struct mmc_queue *);
  70 extern void mmc_queue_suspend(struct mmc_queue *);
  71 extern void mmc_queue_resume(struct mmc_queue *);
  72
  73 extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
  74                                      struct mmc_queue_req *);
  75 extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
  76 extern void mmc_queue_bounce_post(struct mmc_queue_req *);
  77
  78 extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
  79 extern void mmc_packed_clean(struct mmc_queue *);
  80
  81 extern int mmc_access_rpmb(struct mmc_queue *);
  82
  83 #endif