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 enum mmc_issued { 12 MMC_REQ_STARTED, 13 MMC_REQ_BUSY, 14 MMC_REQ_FAILED_TO_START, 15 MMC_REQ_FINISHED, 16 }; 17 18 enum mmc_issue_type { 19 MMC_ISSUE_SYNC, 20 MMC_ISSUE_DCMD, 21 MMC_ISSUE_ASYNC, 22 MMC_ISSUE_MAX, 23 }; 24 25 static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq) 26 { 27 return blk_mq_rq_to_pdu(rq); 28 } 29 30 struct mmc_queue_req; 31 32 static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr) 33 { 34 return blk_mq_rq_from_pdu(mqr); 35 } 36 37 struct mmc_blk_data; 38 struct mmc_blk_ioc_data; 39 40 struct mmc_blk_request { 41 struct mmc_request mrq; 42 struct mmc_command sbc; 43 struct mmc_command cmd; 44 struct mmc_command stop; 45 struct mmc_data data; 46 }; 47 48 /** 49 * enum mmc_drv_op - enumerates the operations in the mmc_queue_req 50 * @MMC_DRV_OP_IOCTL: ioctl operation 51 * @MMC_DRV_OP_IOCTL_RPMB: RPMB-oriented ioctl operation 52 * @MMC_DRV_OP_BOOT_WP: write protect boot partitions 53 * @MMC_DRV_OP_GET_CARD_STATUS: get card status 54 * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card 55 */ 56 enum mmc_drv_op { 57 MMC_DRV_OP_IOCTL, 58 MMC_DRV_OP_IOCTL_RPMB, 59 MMC_DRV_OP_BOOT_WP, 60 MMC_DRV_OP_GET_CARD_STATUS, 61 MMC_DRV_OP_GET_EXT_CSD, 62 }; 63 64 #define MQRQ_XFER_SINGLE_BLOCK BIT(0) 65 66 struct mmc_queue_req { 67 struct mmc_blk_request brq; 68 struct scatterlist *sg; 69 enum mmc_drv_op drv_op; 70 int drv_op_result; 71 void *drv_op_data; 72 u8 ioc_count; 73 u8 retries; 74 u8 flags; 75 }; 76 77 struct mmc_queue { 78 struct mmc_card *card; 79 struct mmc_ctx ctx; 80 struct blk_mq_tag_set tag_set; 81 struct mmc_blk_data *blkdata; 82 struct request_queue *queue; 83 spinlock_t lock; 84 int in_flight[MMC_ISSUE_MAX]; 85 unsigned int cqe_busy; 86 #define MMC_CQE_DCMD_BUSY BIT(0) 87 bool busy; 88 bool recovery_needed; 89 bool in_recovery; 90 bool rw_wait; 91 bool waiting; 92 struct work_struct recovery_work; 93 wait_queue_head_t wait; 94 struct request *recovery_req; 95 struct request *complete_req; 96 struct mutex complete_lock; 97 struct work_struct complete_work; 98 }; 99 100 struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, 101 unsigned int features); 102 extern void mmc_cleanup_queue(struct mmc_queue *); 103 extern void mmc_queue_suspend(struct mmc_queue *); 104 extern void mmc_queue_resume(struct mmc_queue *); 105 extern unsigned int mmc_queue_map_sg(struct mmc_queue *, 106 struct mmc_queue_req *); 107 108 void mmc_cqe_check_busy(struct mmc_queue *mq); 109 void mmc_cqe_recovery_notifier(struct mmc_request *mrq); 110 111 enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req); 112 113 static inline int mmc_tot_in_flight(struct mmc_queue *mq) 114 { 115 return mq->in_flight[MMC_ISSUE_SYNC] + 116 mq->in_flight[MMC_ISSUE_DCMD] + 117 mq->in_flight[MMC_ISSUE_ASYNC]; 118 } 119 120 static inline int mmc_cqe_qcnt(struct mmc_queue *mq) 121 { 122 return mq->in_flight[MMC_ISSUE_DCMD] + 123 mq->in_flight[MMC_ISSUE_ASYNC]; 124 } 125 126 #endif 127