1/* SPDX-License-Identifier: BSD-3-Clause-Clear */
2/*
3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6
7#ifndef ATH12K_HTC_H
8#define ATH12K_HTC_H
9
10#include <linux/kernel.h>
11#include <linux/list.h>
12#include <linux/bug.h>
13#include <linux/skbuff.h>
14#include <linux/timer.h>
15
16struct ath12k_base;
17
18#define HTC_HDR_ENDPOINTID GENMASK(7, 0)
19#define HTC_HDR_FLAGS GENMASK(15, 8)
20#define HTC_HDR_PAYLOADLEN GENMASK(31, 16)
21#define HTC_HDR_CONTROLBYTES0 GENMASK(7, 0)
22#define HTC_HDR_CONTROLBYTES1 GENMASK(15, 8)
23#define HTC_HDR_RESERVED GENMASK(31, 16)
24
25#define HTC_SVC_MSG_SERVICE_ID GENMASK(31, 16)
26#define HTC_SVC_MSG_CONNECTIONFLAGS GENMASK(15, 0)
27#define HTC_SVC_MSG_SERVICEMETALENGTH GENMASK(23, 16)
28#define HTC_READY_MSG_CREDITCOUNT GENMASK(31, 16)
29#define HTC_READY_MSG_CREDITSIZE GENMASK(15, 0)
30#define HTC_READY_MSG_MAXENDPOINTS GENMASK(23, 16)
31
32#define HTC_READY_EX_MSG_HTCVERSION GENMASK(7, 0)
33#define HTC_READY_EX_MSG_MAXMSGSPERHTCBUNDLE GENMASK(15, 8)
34
35#define HTC_SVC_RESP_MSG_SERVICEID GENMASK(31, 16)
36#define HTC_SVC_RESP_MSG_STATUS GENMASK(7, 0)
37#define HTC_SVC_RESP_MSG_ENDPOINTID GENMASK(15, 8)
38#define HTC_SVC_RESP_MSG_MAXMSGSIZE GENMASK(31, 16)
39#define HTC_SVC_RESP_MSG_SERVICEMETALENGTH GENMASK(7, 0)
40
41#define HTC_MSG_MESSAGEID GENMASK(15, 0)
42#define HTC_SETUP_COMPLETE_EX_MSG_SETUPFLAGS GENMASK(31, 0)
43#define HTC_SETUP_COMPLETE_EX_MSG_MAXMSGSPERBUNDLEDRECV GENMASK(7, 0)
44#define HTC_SETUP_COMPLETE_EX_MSG_RSVD0 GENMASK(15, 8)
45#define HTC_SETUP_COMPLETE_EX_MSG_RSVD1 GENMASK(23, 16)
46#define HTC_SETUP_COMPLETE_EX_MSG_RSVD2 GENMASK(31, 24)
47
48enum ath12k_htc_tx_flags {
49 ATH12K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01,
50 ATH12K_HTC_FLAG_SEND_BUNDLE = 0x02
51};
52
53enum ath12k_htc_rx_flags {
54 ATH12K_HTC_FLAG_TRAILER_PRESENT = 0x02,
55 ATH12K_HTC_FLAG_BUNDLE_MASK = 0xF0
56};
57
58struct ath12k_htc_hdr {
59 __le32 htc_info;
60 __le32 ctrl_info;
61} __packed __aligned(4);
62
63enum ath12k_htc_msg_id {
64 ATH12K_HTC_MSG_READY_ID = 1,
65 ATH12K_HTC_MSG_CONNECT_SERVICE_ID = 2,
66 ATH12K_HTC_MSG_CONNECT_SERVICE_RESP_ID = 3,
67 ATH12K_HTC_MSG_SETUP_COMPLETE_ID = 4,
68 ATH12K_HTC_MSG_SETUP_COMPLETE_EX_ID = 5,
69 ATH12K_HTC_MSG_SEND_SUSPEND_COMPLETE = 6,
70 ATH12K_HTC_MSG_NACK_SUSPEND = 7,
71 ATH12K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID = 8,
72};
73
74enum ath12k_htc_version {
75 ATH12K_HTC_VERSION_2P0 = 0x00, /* 2.0 */
76 ATH12K_HTC_VERSION_2P1 = 0x01, /* 2.1 */
77};
78
79enum ath12k_htc_conn_flag_threshold_level {
80 ATH12K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH,
81 ATH12K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF,
82 ATH12K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS,
83 ATH12K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY,
84};
85
86#define ATH12K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK GENMASK(1, 0)
87#define ATH12K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE BIT(2)
88#define ATH12K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL BIT(3)
89#define ATH12K_HTC_CONN_FLAGS_RECV_ALLOC GENMASK(15, 8)
90
91enum ath12k_htc_conn_svc_status {
92 ATH12K_HTC_CONN_SVC_STATUS_SUCCESS = 0,
93 ATH12K_HTC_CONN_SVC_STATUS_NOT_FOUND = 1,
94 ATH12K_HTC_CONN_SVC_STATUS_FAILED = 2,
95 ATH12K_HTC_CONN_SVC_STATUS_NO_RESOURCES = 3,
96 ATH12K_HTC_CONN_SVC_STATUS_NO_MORE_EP = 4
97};
98
99struct ath12k_htc_ready {
100 __le32 id_credit_count;
101 __le32 size_ep;
102} __packed;
103
104struct ath12k_htc_ready_extended {
105 struct ath12k_htc_ready base;
106 __le32 ver_bundle;
107} __packed;
108
109struct ath12k_htc_conn_svc {
110 __le32 msg_svc_id;
111 __le32 flags_len;
112} __packed;
113
114struct ath12k_htc_conn_svc_resp {
115 __le32 msg_svc_id;
116 __le32 flags_len;
117 __le32 svc_meta_pad;
118} __packed;
119
120struct ath12k_htc_setup_complete_extended {
121 __le32 msg_id;
122 __le32 flags;
123 __le32 max_msgs_per_bundled_recv;
124} __packed;
125
126struct ath12k_htc_msg {
127 __le32 msg_svc_id;
128 __le32 flags_len;
129} __packed __aligned(4);
130
131enum ath12k_htc_record_id {
132 ATH12K_HTC_RECORD_NULL = 0,
133 ATH12K_HTC_RECORD_CREDITS = 1
134};
135
136struct ath12k_htc_record_hdr {
137 u8 id; /* @enum ath12k_htc_record_id */
138 u8 len;
139 u8 pad0;
140 u8 pad1;
141} __packed;
142
143struct ath12k_htc_credit_report {
144 u8 eid; /* @enum ath12k_htc_ep_id */
145 u8 credits;
146 u8 pad0;
147 u8 pad1;
148} __packed;
149
150struct ath12k_htc_record {
151 struct ath12k_htc_record_hdr hdr;
152 struct ath12k_htc_credit_report credit_report[];
153} __packed __aligned(4);
154
155/* HTC FRAME structure layout draft
156 *
157 * note: the trailer offset is dynamic depending
158 * on payload length. this is only a struct layout draft
159 *
160 *=======================================================
161 *
162 * HTC HEADER
163 *
164 *=======================================================
165 * |
166 * HTC message | payload
167 * (variable length) | (variable length)
168 *=======================================================
169 *
170 * HTC Record
171 *
172 *=======================================================
173 */
174
175enum ath12k_htc_svc_gid {
176 ATH12K_HTC_SVC_GRP_RSVD = 0,
177 ATH12K_HTC_SVC_GRP_WMI = 1,
178 ATH12K_HTC_SVC_GRP_NMI = 2,
179 ATH12K_HTC_SVC_GRP_HTT = 3,
180 ATH12K_HTC_SVC_GRP_CFG = 4,
181 ATH12K_HTC_SVC_GRP_IPA = 5,
182 ATH12K_HTC_SVC_GRP_PKTLOG = 6,
183
184 ATH12K_HTC_SVC_GRP_TEST = 254,
185 ATH12K_HTC_SVC_GRP_LAST = 255,
186};
187
188#define SVC(group, idx) \
189 (int)(((int)(group) << 8) | (int)(idx))
190
191enum ath12k_htc_svc_id {
192 /* NOTE: service ID of 0x0000 is reserved and should never be used */
193 ATH12K_HTC_SVC_ID_RESERVED = 0x0000,
194 ATH12K_HTC_SVC_ID_UNUSED = ATH12K_HTC_SVC_ID_RESERVED,
195
196 ATH12K_HTC_SVC_ID_RSVD_CTRL = SVC(ATH12K_HTC_SVC_GRP_RSVD, 1),
197 ATH12K_HTC_SVC_ID_WMI_CONTROL = SVC(ATH12K_HTC_SVC_GRP_WMI, 0),
198 ATH12K_HTC_SVC_ID_WMI_DATA_BE = SVC(ATH12K_HTC_SVC_GRP_WMI, 1),
199 ATH12K_HTC_SVC_ID_WMI_DATA_BK = SVC(ATH12K_HTC_SVC_GRP_WMI, 2),
200 ATH12K_HTC_SVC_ID_WMI_DATA_VI = SVC(ATH12K_HTC_SVC_GRP_WMI, 3),
201 ATH12K_HTC_SVC_ID_WMI_DATA_VO = SVC(ATH12K_HTC_SVC_GRP_WMI, 4),
202 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC1 = SVC(ATH12K_HTC_SVC_GRP_WMI, 5),
203 ATH12K_HTC_SVC_ID_WMI_CONTROL_MAC2 = SVC(ATH12K_HTC_SVC_GRP_WMI, 6),
204 ATH12K_HTC_SVC_ID_WMI_CONTROL_DIAG = SVC(ATH12K_HTC_SVC_GRP_WMI, 7),
205
206 ATH12K_HTC_SVC_ID_NMI_CONTROL = SVC(ATH12K_HTC_SVC_GRP_NMI, 0),
207 ATH12K_HTC_SVC_ID_NMI_DATA = SVC(ATH12K_HTC_SVC_GRP_NMI, 1),
208
209 ATH12K_HTC_SVC_ID_HTT_DATA_MSG = SVC(ATH12K_HTC_SVC_GRP_HTT, 0),
210
211 /* raw stream service (i.e. flash, tcmd, calibration apps) */
212 ATH12K_HTC_SVC_ID_TEST_RAW_STREAMS = SVC(ATH12K_HTC_SVC_GRP_TEST, 0),
213 ATH12K_HTC_SVC_ID_IPA_TX = SVC(ATH12K_HTC_SVC_GRP_IPA, 0),
214 ATH12K_HTC_SVC_ID_PKT_LOG = SVC(ATH12K_HTC_SVC_GRP_PKTLOG, 0),
215};
216
217#undef SVC
218
219enum ath12k_htc_ep_id {
220 ATH12K_HTC_EP_UNUSED = -1,
221 ATH12K_HTC_EP_0 = 0,
222 ATH12K_HTC_EP_1 = 1,
223 ATH12K_HTC_EP_2,
224 ATH12K_HTC_EP_3,
225 ATH12K_HTC_EP_4,
226 ATH12K_HTC_EP_5,
227 ATH12K_HTC_EP_6,
228 ATH12K_HTC_EP_7,
229 ATH12K_HTC_EP_8,
230 ATH12K_HTC_EP_COUNT,
231};
232
233struct ath12k_htc_ep_ops {
234 void (*ep_tx_complete)(struct ath12k_base *ab, struct sk_buff *skb);
235 void (*ep_rx_complete)(struct ath12k_base *ab, struct sk_buff *skb);
236 void (*ep_tx_credits)(struct ath12k_base *ab);
237};
238
239/* service connection information */
240struct ath12k_htc_svc_conn_req {
241 u16 service_id;
242 struct ath12k_htc_ep_ops ep_ops;
243 int max_send_queue_depth;
244};
245
246/* service connection response information */
247struct ath12k_htc_svc_conn_resp {
248 u8 buffer_len;
249 u8 actual_len;
250 enum ath12k_htc_ep_id eid;
251 unsigned int max_msg_len;
252 u8 connect_resp_code;
253};
254
255#define ATH12K_NUM_CONTROL_TX_BUFFERS 2
256#define ATH12K_HTC_MAX_LEN 4096
257#define ATH12K_HTC_MAX_CTRL_MSG_LEN 256
258#define ATH12K_HTC_WAIT_TIMEOUT_HZ (1 * HZ)
259#define ATH12K_HTC_CONTROL_BUFFER_SIZE (ATH12K_HTC_MAX_CTRL_MSG_LEN + \
260 sizeof(struct ath12k_htc_hdr))
261#define ATH12K_HTC_CONN_SVC_TIMEOUT_HZ (1 * HZ)
262#define ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES 8
263
264struct ath12k_htc_ep {
265 struct ath12k_htc *htc;
266 enum ath12k_htc_ep_id eid;
267 enum ath12k_htc_svc_id service_id;
268 struct ath12k_htc_ep_ops ep_ops;
269
270 int max_tx_queue_depth;
271 int max_ep_message_len;
272 u8 ul_pipe_id;
273 u8 dl_pipe_id;
274
275 u8 seq_no; /* for debugging */
276 int tx_credits;
277 bool tx_credit_flow_enabled;
278};
279
280struct ath12k_htc_svc_tx_credits {
281 u16 service_id;
282 u8 credit_allocation;
283};
284
285struct ath12k_htc {
286 struct ath12k_base *ab;
287 struct ath12k_htc_ep endpoint[ATH12K_HTC_EP_COUNT];
288
289 /* protects endpoints */
290 spinlock_t tx_lock;
291
292 u8 control_resp_buffer[ATH12K_HTC_MAX_CTRL_MSG_LEN];
293 int control_resp_len;
294
295 struct completion ctl_resp;
296
297 int total_transmit_credits;
298 struct ath12k_htc_svc_tx_credits
299 service_alloc_table[ATH12K_HTC_MAX_SERVICE_ALLOC_ENTRIES];
300 int target_credit_size;
301 u8 wmi_ep_count;
302};
303
304int ath12k_htc_init(struct ath12k_base *ar);
305int ath12k_htc_wait_target(struct ath12k_htc *htc);
306int ath12k_htc_start(struct ath12k_htc *htc);
307int ath12k_htc_connect_service(struct ath12k_htc *htc,
308 struct ath12k_htc_svc_conn_req *conn_req,
309 struct ath12k_htc_svc_conn_resp *conn_resp);
310int ath12k_htc_send(struct ath12k_htc *htc, enum ath12k_htc_ep_id eid,
311 struct sk_buff *packet);
312struct sk_buff *ath12k_htc_alloc_skb(struct ath12k_base *ar, int size);
313void ath12k_htc_rx_completion_handler(struct ath12k_base *ar,
314 struct sk_buff *skb);
315
316#endif
317

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