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 struct mmc_queue_req { 65 struct mmc_blk_request brq; 66 struct scatterlist *sg; 67 enum mmc_drv_op drv_op; 68 int drv_op_result; 69 void *drv_op_data; 70 unsigned int ioc_count; 71 int retries; 72 }; 73 74 struct mmc_queue { 75 struct mmc_card *card; 76 struct mmc_ctx ctx; 77 struct blk_mq_tag_set tag_set; 78 struct mmc_blk_data *blkdata; 79 struct request_queue *queue; 80 spinlock_t lock; 81 int in_flight[MMC_ISSUE_MAX]; 82 unsigned int cqe_busy; 83 #define MMC_CQE_DCMD_BUSY BIT(0) 84 #define MMC_CQE_QUEUE_FULL BIT(1) 85 bool busy; 86 bool use_cqe; 87 bool recovery_needed; 88 bool in_recovery; 89 bool rw_wait; 90 bool waiting; 91 struct work_struct recovery_work; 92 wait_queue_head_t wait; 93 struct request *recovery_req; 94 struct request *complete_req; 95 struct mutex complete_lock; 96 struct work_struct complete_work; 97 }; 98 99 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *); 100 extern void mmc_cleanup_queue(struct mmc_queue *); 101 extern void mmc_queue_suspend(struct mmc_queue *); 102 extern void mmc_queue_resume(struct mmc_queue *); 103 extern unsigned int mmc_queue_map_sg(struct mmc_queue *, 104 struct mmc_queue_req *); 105 106 void mmc_cqe_check_busy(struct mmc_queue *mq); 107 void mmc_cqe_recovery_notifier(struct mmc_request *mrq); 108 109 enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req); 110 111 static inline int mmc_tot_in_flight(struct mmc_queue *mq) 112 { 113 return mq->in_flight[MMC_ISSUE_SYNC] + 114 mq->in_flight[MMC_ISSUE_DCMD] + 115 mq->in_flight[MMC_ISSUE_ASYNC]; 116 } 117 118 static inline int mmc_cqe_qcnt(struct mmc_queue *mq) 119 { 120 return mq->in_flight[MMC_ISSUE_DCMD] + 121 mq->in_flight[MMC_ISSUE_ASYNC]; 122 } 123 124 #endif 125