drivers/mmc/core/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 struct mmc_blk_data;
  15
  16 struct mmc_blk_request {
  17         struct mmc_request      mrq;
  18         struct mmc_command      sbc;
  19         struct mmc_command      cmd;
  20         struct mmc_command      stop;
  21         struct mmc_data         data;
  22         int                     retune_retry_done;
  23 };
  24
  25 struct mmc_queue_req {
  26         struct request          *req;
  27         struct mmc_blk_request  brq;
  28         struct scatterlist      *sg;
  29         char                    *bounce_buf;
  30         struct scatterlist      *bounce_sg;
  31         unsigned int            bounce_sg_len;
  32         struct mmc_async_req    mmc_active;
  33 };
  34
  35 struct mmc_queue {
  36         struct mmc_card         *card;
  37         struct task_struct      *thread;
  38         struct semaphore        thread_sem;
  39         unsigned int            flags;
  40 #define MMC_QUEUE_SUSPENDED     (1 << 0)
  41 #define MMC_QUEUE_NEW_REQUEST   (1 << 1)
  42         bool                    asleep;
  43         struct mmc_blk_data     *blkdata;
  44         struct request_queue    *queue;
  45         struct mmc_queue_req    *mqrq;
  46         struct mmc_queue_req    *mqrq_cur;
  47         struct mmc_queue_req    *mqrq_prev;
  48         int                     qdepth;
  49 };
  50
  51 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
  52                           const char *);
  53 extern void mmc_cleanup_queue(struct mmc_queue *);
  54 extern void mmc_queue_suspend(struct mmc_queue *);
  55 extern void mmc_queue_resume(struct mmc_queue *);
  56
  57 extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
  58                                      struct mmc_queue_req *);
  59 extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
  60 extern void mmc_queue_bounce_post(struct mmc_queue_req *);
  61
  62 extern int mmc_access_rpmb(struct mmc_queue *);
  63
  64 #endif