1/* SPDX-License-Identifier: BSD-3-Clause-Clear */
2/*
3 * Copyright (c) 2019-2021 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6
7#ifndef ATH12K_DBRING_H
8#define ATH12K_DBRING_H
9
10#include <linux/types.h>
11#include <linux/idr.h>
12#include <linux/spinlock.h>
13#include "dp.h"
14
15struct ath12k_dbring_element {
16 dma_addr_t paddr;
17 u8 payload[];
18};
19
20struct ath12k_dbring_data {
21 void *data;
22 u32 data_sz;
23 struct ath12k_wmi_dma_buf_release_meta_data_params meta;
24};
25
26struct ath12k_dbring_buf_release_event {
27 struct ath12k_wmi_dma_buf_release_fixed_params fixed;
28 const struct ath12k_wmi_dma_buf_release_entry_params *buf_entry;
29 const struct ath12k_wmi_dma_buf_release_meta_data_params *meta_data;
30 u32 num_buf_entry;
31 u32 num_meta;
32};
33
34struct ath12k_dbring_cap {
35 u32 pdev_id;
36 enum wmi_direct_buffer_module id;
37 u32 min_elem;
38 u32 min_buf_sz;
39 u32 min_buf_align;
40};
41
42struct ath12k_dbring {
43 struct dp_srng refill_srng;
44 struct idr bufs_idr;
45 /* Protects bufs_idr */
46 spinlock_t idr_lock;
47 dma_addr_t tp_addr;
48 dma_addr_t hp_addr;
49 int bufs_max;
50 u32 pdev_id;
51 u32 buf_sz;
52 u32 buf_align;
53 u32 num_resp_per_event;
54 u32 event_timeout_ms;
55 int (*handler)(struct ath12k *ar, struct ath12k_dbring_data *data);
56};
57
58int ath12k_dbring_set_cfg(struct ath12k *ar,
59 struct ath12k_dbring *ring,
60 u32 num_resp_per_event,
61 u32 event_timeout_ms,
62 int (*handler)(struct ath12k *,
63 struct ath12k_dbring_data *));
64int ath12k_dbring_wmi_cfg_setup(struct ath12k *ar,
65 struct ath12k_dbring *ring,
66 enum wmi_direct_buffer_module id);
67int ath12k_dbring_buf_setup(struct ath12k *ar,
68 struct ath12k_dbring *ring,
69 struct ath12k_dbring_cap *db_cap);
70int ath12k_dbring_srng_setup(struct ath12k *ar, struct ath12k_dbring *ring,
71 int ring_num, int num_entries);
72int ath12k_dbring_buffer_release_event(struct ath12k_base *ab,
73 struct ath12k_dbring_buf_release_event *ev);
74int ath12k_dbring_get_cap(struct ath12k_base *ab,
75 u8 pdev_idx,
76 enum wmi_direct_buffer_module id,
77 struct ath12k_dbring_cap *db_cap);
78void ath12k_dbring_srng_cleanup(struct ath12k *ar, struct ath12k_dbring *ring);
79void ath12k_dbring_buf_cleanup(struct ath12k *ar, struct ath12k_dbring *ring);
80#endif /* ATH12K_DBRING_H */
81

source code of linux/drivers/net/wireless/ath/ath12k/dbring.h