1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/mmc/core/queue.h b/drivers/mmc/core/queue.h
new file mode 100644
index 000000000000..45c4e0ab3b5e
--- /dev/null
+++ b/drivers/mmc/core/queue.h
@@ -0,0 +1,115 @@
+#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);
+}
+
+static inline bool mmc_req_is_special(struct request *req)
+{
+	return req &&
+		(req_op(req) == REQ_OP_FLUSH ||
+		 req_op(req) == REQ_OP_DISCARD ||
+		 req_op(req) == REQ_OP_SECURE_ERASE);
+}
+
+struct task_struct;
+struct mmc_blk_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;
+	int			retune_retry_done;
+};
+
+struct mmc_queue_req {
+	struct request		*req;
+	struct mmc_blk_request	brq;
+	struct scatterlist	*sg;
+	char			*bounce_buf;
+	struct scatterlist	*bounce_sg;
+	unsigned int		bounce_sg_len;
+	struct mmc_async_req	areq;
+	int			retries;
+};
+
+struct mmc_queue {
+	struct mmc_card		*card;
+	struct task_struct	*thread;
+	struct semaphore	thread_sem;
+	bool			suspended;
+	bool			asleep;
+	struct mmc_blk_data	*blkdata;
+	struct request_queue	*queue;
+	/*
+	 * FIXME: this counter is not a very reliable way of keeping
+	 * track of how many requests that are ongoing. Switch to just
+	 * letting the block core keep track of requests and per-request
+	 * associated mmc_queue_req data.
+	 */
+	int			qcnt;
+	/* Following are defined for a Command Queue Engine */
+	int			cqe_in_flight[MMC_ISSUE_MAX];
+	unsigned int		cqe_busy;
+	bool			cqe_recovery_needed;
+	bool			cqe_in_recovery;
+#define MMC_CQE_DCMD_BUSY	BIT(0)
+#define MMC_CQE_QUEUE_FULL	BIT(1)
+};
+
+extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
+			  const char *, int);
+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 *);
+extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
+extern void mmc_queue_bounce_post(struct mmc_queue_req *);
+
+extern int mmc_access_rpmb(struct mmc_queue *);
+
+void mmc_cqe_kick_queue(struct mmc_queue *mq);
+
+enum mmc_issue_type mmc_cqe_issue_type(struct mmc_host *host,
+				       struct request *req);
+
+static inline int mmc_cqe_tot_in_flight(struct mmc_queue *mq)
+{
+	return mq->cqe_in_flight[MMC_ISSUE_SYNC] +
+	       mq->cqe_in_flight[MMC_ISSUE_DCMD] +
+	       mq->cqe_in_flight[MMC_ISSUE_ASYNC];
+}
+
+static inline int mmc_cqe_qcnt(struct mmc_queue *mq)
+{
+	return mq->cqe_in_flight[MMC_ISSUE_DCMD] +
+	       mq->cqe_in_flight[MMC_ISSUE_ASYNC];
+}
+
+#endif