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/* 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
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