drivers/mmc/core/queue.h

   1 #ifndef MMC_QUEUE_H
   2 #define MMC_QUEUE_H
   3
   4 #include <linux/types.h>
   5 #include <linux/blkdev.h>
   6 #include <linux/mmc/core.h>
   7 #include <linux/mmc/host.h>
   8
   9 static inline bool mmc_req_is_special(struct request *req)
  10 {
  11         return req &&
  12                 (req_op(req) == REQ_OP_FLUSH ||
  13                  req_op(req) == REQ_OP_DISCARD ||
  14                  req_op(req) == REQ_OP_SECURE_ERASE);
  15 }
  16
  17 struct task_struct;
  18 struct mmc_blk_data;
  19
  20 struct mmc_blk_request {
  21         struct mmc_request      mrq;
  22         struct mmc_command      sbc;
  23         struct mmc_command      cmd;
  24         struct mmc_command      stop;
  25         struct mmc_data         data;
  26         int                     retune_retry_done;
  27 };
  28
  29 struct mmc_queue_req {
  30         struct request          *req;
  31         struct mmc_blk_request  brq;
  32         struct scatterlist      *sg;
  33         char                    *bounce_buf;
  34         struct scatterlist      *bounce_sg;
  35         unsigned int            bounce_sg_len;
  36         struct mmc_async_req    areq;
  37         int                     task_id;
  38 };
  39
  40 struct mmc_queue {
  41         struct mmc_card         *card;
  42         struct task_struct      *thread;
  43         struct semaphore        thread_sem;
  44         bool                    suspended;
  45         bool                    asleep;
  46         struct mmc_blk_data     *blkdata;
  47         struct request_queue    *queue;
  48         struct mmc_queue_req    *mqrq;
  49         int                     qdepth;
  50         int                     qcnt;
  51         unsigned long           qslots;
  52 };
  53
  54 extern int mmc_queue_alloc_shared_queue(struct mmc_card *card);
  55 extern void mmc_queue_free_shared_queue(struct mmc_card *card);
  56 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
  57                           const char *);
  58 extern void mmc_cleanup_queue(struct mmc_queue *);
  59 extern void mmc_queue_suspend(struct mmc_queue *);
  60 extern void mmc_queue_resume(struct mmc_queue *);
  61
  62 extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
  63                                      struct mmc_queue_req *);
  64 extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
  65 extern void mmc_queue_bounce_post(struct mmc_queue_req *);
  66
  67 extern int mmc_access_rpmb(struct mmc_queue *);
  68
  69 extern struct mmc_queue_req *mmc_queue_req_find(struct mmc_queue *,
  70                                                 struct request *);
  71 extern void mmc_queue_req_free(struct mmc_queue *, struct mmc_queue_req *);
  72
  73 #endif