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1/* SPDX-License-Identifier: BSD-3-Clause-Clear */
2/*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 */
5
6#ifndef ATH11K_HTC_H
7#define ATH11K_HTC_H
8
9#include <linux/kernel.h>
10#include <linux/list.h>
11#include <linux/bug.h>
12#include <linux/skbuff.h>
13#include <linux/timer.h>
14
15struct ath11k_base;
16
17#define HTC_HDR_ENDPOINTID GENMASK(7, 0)
18#define HTC_HDR_FLAGS GENMASK(15, 8)
19#define HTC_HDR_PAYLOADLEN GENMASK(31, 16)
20#define HTC_HDR_CONTROLBYTES0 GENMASK(7, 0)
21#define HTC_HDR_CONTROLBYTES1 GENMASK(15, 8)
22#define HTC_HDR_RESERVED GENMASK(31, 16)
23
24#define HTC_SVC_MSG_SERVICE_ID GENMASK(31, 16)
25#define HTC_SVC_MSG_CONNECTIONFLAGS GENMASK(15, 0)
26#define HTC_SVC_MSG_SERVICEMETALENGTH GENMASK(23, 16)
27#define HTC_READY_MSG_CREDITCOUNT GENMASK(31, 16)
28#define HTC_READY_MSG_CREDITSIZE GENMASK(15, 0)
29#define HTC_READY_MSG_MAXENDPOINTS GENMASK(23, 16)
30
31#define HTC_READY_EX_MSG_HTCVERSION GENMASK(7, 0)
32#define HTC_READY_EX_MSG_MAXMSGSPERHTCBUNDLE GENMASK(15, 8)
33
34#define HTC_SVC_RESP_MSG_SERVICEID GENMASK(31, 16)
35#define HTC_SVC_RESP_MSG_STATUS GENMASK(7, 0)
36#define HTC_SVC_RESP_MSG_ENDPOINTID GENMASK(15, 8)
37#define HTC_SVC_RESP_MSG_MAXMSGSIZE GENMASK(31, 16)
38#define HTC_SVC_RESP_MSG_SERVICEMETALENGTH GENMASK(7, 0)
39
40#define HTC_MSG_MESSAGEID GENMASK(15, 0)
41#define HTC_SETUP_COMPLETE_EX_MSG_SETUPFLAGS GENMASK(31, 0)
42#define HTC_SETUP_COMPLETE_EX_MSG_MAXMSGSPERBUNDLEDRECV GENMASK(7, 0)
43#define HTC_SETUP_COMPLETE_EX_MSG_RSVD0 GENMASK(15, 8)
44#define HTC_SETUP_COMPLETE_EX_MSG_RSVD1 GENMASK(23, 16)
45#define HTC_SETUP_COMPLETE_EX_MSG_RSVD2 GENMASK(31, 24)
46
47enum ath11k_htc_tx_flags {
48 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01,
49 ATH11K_HTC_FLAG_SEND_BUNDLE = 0x02
50};
51
52enum ath11k_htc_rx_flags {
53 ATH11K_HTC_FLAG_TRAILER_PRESENT = 0x02,
54 ATH11K_HTC_FLAG_BUNDLE_MASK = 0xF0
55};
56
57struct ath11k_htc_hdr {
58 u32 htc_info;
59 u32 ctrl_info;
60} __packed __aligned(4);
61
62enum ath11k_htc_msg_id {
63 ATH11K_HTC_MSG_READY_ID = 1,
64 ATH11K_HTC_MSG_CONNECT_SERVICE_ID = 2,
65 ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID = 3,
66 ATH11K_HTC_MSG_SETUP_COMPLETE_ID = 4,
67 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID = 5,
68 ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE = 6,
69 ATH11K_HTC_MSG_NACK_SUSPEND = 7,
70 ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID = 8,
71};
72
73enum ath11k_htc_version {
74 ATH11K_HTC_VERSION_2P0 = 0x00, /* 2.0 */
75 ATH11K_HTC_VERSION_2P1 = 0x01, /* 2.1 */
76};
77
78#define ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK GENMASK(1, 0)
79#define ATH11K_HTC_CONN_FLAGS_RECV_ALLOC GENMASK(15, 8)
80
81enum ath11k_htc_conn_flags {
82 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH = 0x0,
83 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF = 0x1,
84 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS = 0x2,
85 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY = 0x3,
86 ATH11K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE = 1 << 2,
87 ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL = 1 << 3
88};
89
90enum ath11k_htc_conn_svc_status {
91 ATH11K_HTC_CONN_SVC_STATUS_SUCCESS = 0,
92 ATH11K_HTC_CONN_SVC_STATUS_NOT_FOUND = 1,
93 ATH11K_HTC_CONN_SVC_STATUS_FAILED = 2,
94 ATH11K_HTC_CONN_SVC_STATUS_NO_RESOURCES = 3,
95 ATH11K_HTC_CONN_SVC_STATUS_NO_MORE_EP = 4
96};
97
98struct ath11k_htc_ready {
99 u32 id_credit_count;
100 u32 size_ep;
101} __packed;
102
103struct ath11k_htc_ready_extended {
104 struct ath11k_htc_ready base;
105 u32 ver_bundle;
106} __packed;
107
108struct ath11k_htc_conn_svc {
109 u32 msg_svc_id;
110 u32 flags_len;
111} __packed;
112
113struct ath11k_htc_conn_svc_resp {
114 u32 msg_svc_id;
115 u32 flags_len;
116 u32 svc_meta_pad;
117} __packed;
118
119struct ath11k_htc_setup_complete_extended {
120 u32 msg_id;
121 u32 flags;
122 u32 max_msgs_per_bundled_recv;
123} __packed;
124
125struct ath11k_htc_msg {
126 u32 msg_svc_id;
127 u32 flags_len;
128} __packed __aligned(4);
129
130enum ath11k_htc_record_id {
131 ATH11K_HTC_RECORD_NULL = 0,
132 ATH11K_HTC_RECORD_CREDITS = 1
133};
134
135struct ath11k_htc_record_hdr {
136 u8 id; /* @enum ath11k_htc_record_id */
137 u8 len;
138 u8 pad0;
139 u8 pad1;
140} __packed;
141
142struct ath11k_htc_credit_report {
143 u8 eid; /* @enum ath11k_htc_ep_id */
144 u8 credits;
145 u8 pad0;
146 u8 pad1;
147} __packed;
148
149struct ath11k_htc_record {
150 struct ath11k_htc_record_hdr hdr;
151 union {
152 struct ath11k_htc_credit_report credit_report[0];
153 u8 pauload[0];
154 };
155} __packed __aligned(4);
156
157/* note: the trailer offset is dynamic depending
158 * on payload length. this is only a struct layout draft
159 */
160struct ath11k_htc_frame {
161 struct ath11k_htc_hdr hdr;
162 union {
163 struct ath11k_htc_msg msg;
164 u8 payload[0];
165 };
166 struct ath11k_htc_record trailer[0];
167} __packed __aligned(4);
168
169enum ath11k_htc_svc_gid {
170 ATH11K_HTC_SVC_GRP_RSVD = 0,
171 ATH11K_HTC_SVC_GRP_WMI = 1,
172 ATH11K_HTC_SVC_GRP_NMI = 2,
173 ATH11K_HTC_SVC_GRP_HTT = 3,
174 ATH11K_HTC_SVC_GRP_CFG = 4,
175 ATH11K_HTC_SVC_GRP_IPA = 5,
176 ATH11K_HTC_SVC_GRP_PKTLOG = 6,
177
178 ATH11K_HTC_SVC_GRP_TEST = 254,
179 ATH11K_HTC_SVC_GRP_LAST = 255,
180};
181
182#define SVC(group, idx) \
183 (int)(((int)(group) << 8) | (int)(idx))
184
185enum ath11k_htc_svc_id {
186 /* NOTE: service ID of 0x0000 is reserved and should never be used */
187 ATH11K_HTC_SVC_ID_RESERVED = 0x0000,
188 ATH11K_HTC_SVC_ID_UNUSED = ATH11K_HTC_SVC_ID_RESERVED,
189
190 ATH11K_HTC_SVC_ID_RSVD_CTRL = SVC(ATH11K_HTC_SVC_GRP_RSVD, 1),
191 ATH11K_HTC_SVC_ID_WMI_CONTROL = SVC(ATH11K_HTC_SVC_GRP_WMI, 0),
192 ATH11K_HTC_SVC_ID_WMI_DATA_BE = SVC(ATH11K_HTC_SVC_GRP_WMI, 1),
193 ATH11K_HTC_SVC_ID_WMI_DATA_BK = SVC(ATH11K_HTC_SVC_GRP_WMI, 2),
194 ATH11K_HTC_SVC_ID_WMI_DATA_VI = SVC(ATH11K_HTC_SVC_GRP_WMI, 3),
195 ATH11K_HTC_SVC_ID_WMI_DATA_VO = SVC(ATH11K_HTC_SVC_GRP_WMI, 4),
196 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 = SVC(ATH11K_HTC_SVC_GRP_WMI, 5),
197 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2 = SVC(ATH11K_HTC_SVC_GRP_WMI, 6),
198
199 ATH11K_HTC_SVC_ID_NMI_CONTROL = SVC(ATH11K_HTC_SVC_GRP_NMI, 0),
200 ATH11K_HTC_SVC_ID_NMI_DATA = SVC(ATH11K_HTC_SVC_GRP_NMI, 1),
201
202 ATH11K_HTC_SVC_ID_HTT_DATA_MSG = SVC(ATH11K_HTC_SVC_GRP_HTT, 0),
203
204 /* raw stream service (i.e. flash, tcmd, calibration apps) */
205 ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS = SVC(ATH11K_HTC_SVC_GRP_TEST, 0),
206 ATH11K_HTC_SVC_ID_IPA_TX = SVC(ATH11K_HTC_SVC_GRP_IPA, 0),
207 ATH11K_HTC_SVC_ID_PKT_LOG = SVC(ATH11K_HTC_SVC_GRP_PKTLOG, 0),
208};
209
210#undef SVC
211
212enum ath11k_htc_ep_id {
213 ATH11K_HTC_EP_UNUSED = -1,
214 ATH11K_HTC_EP_0 = 0,
215 ATH11K_HTC_EP_1 = 1,
216 ATH11K_HTC_EP_2,
217 ATH11K_HTC_EP_3,
218 ATH11K_HTC_EP_4,
219 ATH11K_HTC_EP_5,
220 ATH11K_HTC_EP_6,
221 ATH11K_HTC_EP_7,
222 ATH11K_HTC_EP_8,
223 ATH11K_HTC_EP_COUNT,
224};
225
226struct ath11k_htc_ep_ops {
227 void (*ep_tx_complete)(struct ath11k_base *, struct sk_buff *);
228 void (*ep_rx_complete)(struct ath11k_base *, struct sk_buff *);
229 void (*ep_tx_credits)(struct ath11k_base *);
230};
231
232/* service connection information */
233struct ath11k_htc_svc_conn_req {
234 u16 service_id;
235 struct ath11k_htc_ep_ops ep_ops;
236 int max_send_queue_depth;
237};
238
239/* service connection response information */
240struct ath11k_htc_svc_conn_resp {
241 u8 buffer_len;
242 u8 actual_len;
243 enum ath11k_htc_ep_id eid;
244 unsigned int max_msg_len;
245 u8 connect_resp_code;
246};
247
248#define ATH11K_NUM_CONTROL_TX_BUFFERS 2
249#define ATH11K_HTC_MAX_LEN 4096
250#define ATH11K_HTC_MAX_CTRL_MSG_LEN 256
251#define ATH11K_HTC_WAIT_TIMEOUT_HZ (1 * HZ)
252#define ATH11K_HTC_CONTROL_BUFFER_SIZE (ATH11K_HTC_MAX_CTRL_MSG_LEN + \
253 sizeof(struct ath11k_htc_hdr))
254#define ATH11K_HTC_CONN_SVC_TIMEOUT_HZ (1 * HZ)
255#define ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES 8
256
257struct ath11k_htc_ep {
258 struct ath11k_htc *htc;
259 enum ath11k_htc_ep_id eid;
260 enum ath11k_htc_svc_id service_id;
261 struct ath11k_htc_ep_ops ep_ops;
262
263 int max_tx_queue_depth;
264 int max_ep_message_len;
265 u8 ul_pipe_id;
266 u8 dl_pipe_id;
267
268 u8 seq_no; /* for debugging */
269 int tx_credits;
270 bool tx_credit_flow_enabled;
271};
272
273struct ath11k_htc_svc_tx_credits {
274 u16 service_id;
275 u8 credit_allocation;
276};
277
278struct ath11k_htc {
279 struct ath11k_base *ab;
280 struct ath11k_htc_ep endpoint[ATH11K_HTC_EP_COUNT];
281
282 /* protects endpoints */
283 spinlock_t tx_lock;
284
285 u8 control_resp_buffer[ATH11K_HTC_MAX_CTRL_MSG_LEN];
286 int control_resp_len;
287
288 struct completion ctl_resp;
289
290 int total_transmit_credits;
291 struct ath11k_htc_svc_tx_credits
292 service_alloc_table[ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES];
293 int target_credit_size;
294 u8 wmi_ep_count;
295};
296
297int ath11k_htc_init(struct ath11k_base *ar);
298int ath11k_htc_wait_target(struct ath11k_htc *htc);
299int ath11k_htc_start(struct ath11k_htc *htc);
300int ath11k_htc_connect_service(struct ath11k_htc *htc,
301 struct ath11k_htc_svc_conn_req *conn_req,
302 struct ath11k_htc_svc_conn_resp *conn_resp);
303int ath11k_htc_send(struct ath11k_htc *htc, enum ath11k_htc_ep_id eid,
304 struct sk_buff *packet);
305struct sk_buff *ath11k_htc_alloc_skb(struct ath11k_base *ar, int size);
306void ath11k_htc_rx_completion_handler(struct ath11k_base *ar,
307 struct sk_buff *skb);
308
309#endif