| /* 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 |
