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#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
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