1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/mmc/core/queue.h b/drivers/mmc/core/queue.h
new file mode 100644
index 000000000..9ade3bcbb
--- /dev/null
+++ b/drivers/mmc/core/queue.h
@@ -0,0 +1,122 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef MMC_QUEUE_H
+#define MMC_QUEUE_H
+
+#include <linux/types.h>
+#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
+#include <linux/mmc/core.h>
+#include <linux/mmc/host.h>
+
+enum mmc_issued {
+	MMC_REQ_STARTED,
+	MMC_REQ_BUSY,
+	MMC_REQ_FAILED_TO_START,
+	MMC_REQ_FINISHED,
+};
+
+enum mmc_issue_type {
+	MMC_ISSUE_SYNC,
+	MMC_ISSUE_DCMD,
+	MMC_ISSUE_ASYNC,
+	MMC_ISSUE_MAX,
+};
+
+static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq)
+{
+	return blk_mq_rq_to_pdu(rq);
+}
+
+struct mmc_queue_req;
+
+static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr)
+{
+	return blk_mq_rq_from_pdu(mqr);
+}
+
+struct mmc_blk_data;
+struct mmc_blk_ioc_data;
+
+struct mmc_blk_request {
+	struct mmc_request	mrq;
+	struct mmc_command	sbc;
+	struct mmc_command	cmd;
+	struct mmc_command	stop;
+	struct mmc_data		data;
+};
+
+/**
+ * enum mmc_drv_op - enumerates the operations in the mmc_queue_req
+ * @MMC_DRV_OP_IOCTL: ioctl operation
+ * @MMC_DRV_OP_IOCTL_RPMB: RPMB-oriented ioctl operation
+ * @MMC_DRV_OP_BOOT_WP: write protect boot partitions
+ * @MMC_DRV_OP_GET_CARD_STATUS: get card status
+ * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card
+ */
+enum mmc_drv_op {
+	MMC_DRV_OP_IOCTL,
+	MMC_DRV_OP_IOCTL_RPMB,
+	MMC_DRV_OP_BOOT_WP,
+	MMC_DRV_OP_GET_CARD_STATUS,
+	MMC_DRV_OP_GET_EXT_CSD,
+};
+
+struct mmc_queue_req {
+	struct mmc_blk_request	brq;
+	struct scatterlist	*sg;
+	enum mmc_drv_op		drv_op;
+	int			drv_op_result;
+	void			*drv_op_data;
+	unsigned int		ioc_count;
+	int			retries;
+};
+
+struct mmc_queue {
+	struct mmc_card		*card;
+	struct mmc_ctx		ctx;
+	struct blk_mq_tag_set	tag_set;
+	struct mmc_blk_data	*blkdata;
+	struct request_queue	*queue;
+	spinlock_t		lock;
+	int			in_flight[MMC_ISSUE_MAX];
+	unsigned int		cqe_busy;
+#define MMC_CQE_DCMD_BUSY	BIT(0)
+	bool			busy;
+	bool			recovery_needed;
+	bool			in_recovery;
+	bool			rw_wait;
+	bool			waiting;
+	struct work_struct	recovery_work;
+	wait_queue_head_t	wait;
+	struct request		*recovery_req;
+	struct request		*complete_req;
+	struct mutex		complete_lock;
+	struct work_struct	complete_work;
+};
+
+struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card);
+extern void mmc_cleanup_queue(struct mmc_queue *);
+extern void mmc_queue_suspend(struct mmc_queue *);
+extern void mmc_queue_resume(struct mmc_queue *);
+extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
+				     struct mmc_queue_req *);
+
+void mmc_cqe_check_busy(struct mmc_queue *mq);
+void mmc_cqe_recovery_notifier(struct mmc_request *mrq);
+
+enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req);
+
+static inline int mmc_tot_in_flight(struct mmc_queue *mq)
+{
+	return mq->in_flight[MMC_ISSUE_SYNC] +
+	       mq->in_flight[MMC_ISSUE_DCMD] +
+	       mq->in_flight[MMC_ISSUE_ASYNC];
+}
+
+static inline int mmc_cqe_qcnt(struct mmc_queue *mq)
+{
+	return mq->in_flight[MMC_ISSUE_DCMD] +
+	       mq->in_flight[MMC_ISSUE_ASYNC];
+}
+
+#endif