/* SPDX-License-Identifier: GPL-2.0 */
#ifndef LINUX_MMC_HSQ_H
#define LINUX_MMC_HSQ_H

#define HSQ_NUM_SLOTS   64
#define HSQ_INVALID_TAG HSQ_NUM_SLOTS

/*
 * For MMC host software queue, we only allow 2 requests in
 * flight to avoid a long latency.
 */
#define HSQ_NORMAL_DEPTH        2
/*
 * For 4k random writes, we allow hsq_depth to increase to 5
 * for better performance.
 */
#define HSQ_PERFORMANCE_DEPTH   5

struct hsq_slot {
        struct mmc_request *mrq;
};

struct mmc_hsq {
        struct mmc_host *mmc;
        struct mmc_request *mrq;
        wait_queue_head_t wait_queue;
        struct hsq_slot *slot;
        spinlock_t lock;
        struct work_struct retry_work;

        int next_tag;
        int num_slots;
        int qcnt;
        int tail_tag;
        int tag_slot[HSQ_NUM_SLOTS];

        bool enabled;
        bool waiting_for_idle;
        bool recovery_halt;
};

int mmc_hsq_init(struct mmc_hsq *hsq, struct mmc_host *mmc);
void mmc_hsq_suspend(struct mmc_host *mmc);
int mmc_hsq_resume(struct mmc_host *mmc);
bool mmc_hsq_finalize_request(struct mmc_host *mmc, struct mmc_request *mrq);

#endif