1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef LINUX_MMC_HSQ_H 3#define LINUX_MMC_HSQ_H 4 5#define HSQ_NUM_SLOTS 64 6#define HSQ_INVALID_TAG HSQ_NUM_SLOTS 7 8/* 9 * For MMC host software queue, we only allow 2 requests in 10 * flight to avoid a long latency. 11 */ 12#define HSQ_NORMAL_DEPTH 2 13/* 14 * For 4k random writes, we allow hsq_depth to increase to 5 15 * for better performance. 16 */ 17#define HSQ_PERFORMANCE_DEPTH 5 18 19struct hsq_slot { 20 struct mmc_request *mrq; 21}; 22 23struct mmc_hsq { 24 struct mmc_host *mmc; 25 struct mmc_request *mrq; 26 wait_queue_head_t wait_queue; 27 struct hsq_slot *slot; 28 spinlock_t lock; 29 struct work_struct retry_work; 30 31 int next_tag; 32 int num_slots; 33 int qcnt; 34 int tail_tag; 35 int tag_slot[HSQ_NUM_SLOTS]; 36 37 bool enabled; 38 bool waiting_for_idle; 39 bool recovery_halt; 40}; 41 42int mmc_hsq_init(struct mmc_hsq *hsq, struct mmc_host *mmc); 43void mmc_hsq_suspend(struct mmc_host *mmc); 44int mmc_hsq_resume(struct mmc_host *mmc); 45bool mmc_hsq_finalize_request(struct mmc_host *mmc, struct mmc_request *mrq); 46 47#endif 48