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