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 ||
   8                  req_op(req) == REQ_OP_DISCARD ||
   9                  req_op(req) == REQ_OP_SECURE_ERASE);
  10 }
  11
  12 struct request;
  13 struct task_struct;
  14
  15 struct mmc_blk_request {
  16         struct mmc_request      mrq;
  17         struct mmc_command      sbc;
  18         struct mmc_command      cmd;
  19         struct mmc_command      stop;
  20         struct mmc_data         data;
  21         int                     retune_retry_done;
  22 };
  23
  24 enum mmc_packed_type {
  25         MMC_PACKED_NONE = 0,
  26         MMC_PACKED_WRITE,
  27 };
  28
  29 #define mmc_packed_cmd(type)    ((type) != MMC_PACKED_NONE)
  30 #define mmc_packed_wr(type)     ((type) == MMC_PACKED_WRITE)
  31
  32 struct mmc_packed {
  33         struct list_head        list;
  34         __le32                  cmd_hdr[1024];
  35         unsigned int            blocks;
  36         u8                      nr_entries;
  37         u8                      retries;
  38         s16                     idx_failure;
  39 };
  40
  41 struct mmc_queue_req {
  42         struct request          *req;
  43         struct mmc_blk_request  brq;
  44         struct scatterlist      *sg;
  45         char                    *bounce_buf;
  46         struct scatterlist      *bounce_sg;
  47         unsigned int            bounce_sg_len;
  48         struct mmc_async_req    mmc_active;
  49         enum mmc_packed_type    cmd_type;
  50         struct mmc_packed       *packed;
  51 };
  52
  53 struct mmc_queue {
  54         struct mmc_card         *card;
  55         struct task_struct      *thread;
  56         struct semaphore        thread_sem;
  57         unsigned int            flags;
  58 #define MMC_QUEUE_SUSPENDED     (1 << 0)
  59 #define MMC_QUEUE_NEW_REQUEST   (1 << 1)
  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