drivers/mmc/core/queue.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef MMC_QUEUE_H
   3 #define MMC_QUEUE_H
   4
   5 #include <linux/types.h>
   6 #include <linux/blkdev.h>
   7 #include <linux/blk-mq.h>
   8 #include <linux/mmc/core.h>
   9 #include <linux/mmc/host.h>
  10
  11 static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq)
  12 {
  13         return blk_mq_rq_to_pdu(rq);
  14 }
  15
  16 struct mmc_queue_req;
  17
  18 static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr)
  19 {
  20         return blk_mq_rq_from_pdu(mqr);
  21 }
  22
  23 struct task_struct;
  24 struct mmc_blk_data;
  25 struct mmc_blk_ioc_data;
  26
  27 struct mmc_blk_request {
  28         struct mmc_request      mrq;
  29         struct mmc_command      sbc;
  30         struct mmc_command      cmd;
  31         struct mmc_command      stop;
  32         struct mmc_data         data;
  33         int                     retune_retry_done;
  34 };
  35
  36 /**
  37  * enum mmc_drv_op - enumerates the operations in the mmc_queue_req
  38  * @MMC_DRV_OP_IOCTL: ioctl operation
  39  * @MMC_DRV_OP_BOOT_WP: write protect boot partitions
  40  * @MMC_DRV_OP_GET_CARD_STATUS: get card status
  41  * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card
  42  */
  43 enum mmc_drv_op {
  44         MMC_DRV_OP_IOCTL,
  45         MMC_DRV_OP_BOOT_WP,
  46         MMC_DRV_OP_GET_CARD_STATUS,
  47         MMC_DRV_OP_GET_EXT_CSD,
  48 };
  49
  50 struct mmc_queue_req {
  51         struct mmc_blk_request  brq;
  52         struct scatterlist      *sg;
  53         struct mmc_async_req    areq;
  54         enum mmc_drv_op         drv_op;
  55         int                     drv_op_result;
  56         void                    *drv_op_data;
  57         unsigned int            ioc_count;
  58 };
  59
  60 struct mmc_queue {
  61         struct mmc_card         *card;
  62         struct task_struct      *thread;
  63         struct semaphore        thread_sem;
  64         bool                    suspended;
  65         bool                    asleep;
  66         struct mmc_blk_data     *blkdata;
  67         struct request_queue    *queue;
  68         /*
  69          * FIXME: this counter is not a very reliable way of keeping
  70          * track of how many requests that are ongoing. Switch to just
  71          * letting the block core keep track of requests and per-request
  72          * associated mmc_queue_req data.
  73          */
  74         int                     qcnt;
  75 };
  76
  77 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
  78                           const char *);
  79 extern void mmc_cleanup_queue(struct mmc_queue *);
  80 extern void mmc_queue_suspend(struct mmc_queue *);
  81 extern void mmc_queue_resume(struct mmc_queue *);
  82 extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
  83                                      struct mmc_queue_req *);
  84
  85 extern int mmc_access_rpmb(struct mmc_queue *);
  86
  87 #endif