1 /* SPDX-License-Identifier: BSD-3-Clause-Clear */
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
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>
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)
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)
32 #define HTC_READY_EX_MSG_HTCVERSION GENMASK(7, 0)
33 #define HTC_READY_EX_MSG_MAXMSGSPERHTCBUNDLE GENMASK(15, 8)
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)
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)
48 enum ath11k_htc_tx_flags {
49 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01,
50 ATH11K_HTC_FLAG_SEND_BUNDLE = 0x02
53 enum ath11k_htc_rx_flags {
54 ATH11K_HTC_FLAG_TRAILER_PRESENT = 0x02,
55 ATH11K_HTC_FLAG_BUNDLE_MASK = 0xF0
58 struct ath11k_htc_hdr {
61 } __packed __aligned(4);
63 enum ath11k_htc_msg_id {
64 ATH11K_HTC_MSG_READY_ID = 1,
65 ATH11K_HTC_MSG_CONNECT_SERVICE_ID = 2,
66 ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID = 3,
67 ATH11K_HTC_MSG_SETUP_COMPLETE_ID = 4,
68 ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID = 5,
69 ATH11K_HTC_MSG_SEND_SUSPEND_COMPLETE = 6,
70 ATH11K_HTC_MSG_NACK_SUSPEND = 7,
71 ATH11K_HTC_MSG_WAKEUP_FROM_SUSPEND_ID = 8,
74 enum ath11k_htc_version {
75 ATH11K_HTC_VERSION_2P0 = 0x00, /* 2.0 */
76 ATH11K_HTC_VERSION_2P1 = 0x01, /* 2.1 */
79 #define ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK GENMASK(1, 0)
80 #define ATH11K_HTC_CONN_FLAGS_RECV_ALLOC GENMASK(15, 8)
82 enum ath11k_htc_conn_flags {
83 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH = 0x0,
84 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF = 0x1,
85 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS = 0x2,
86 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY = 0x3,
87 ATH11K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE = 0x4,
88 ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL = 0x8,
91 enum ath11k_htc_conn_svc_status {
92 ATH11K_HTC_CONN_SVC_STATUS_SUCCESS = 0,
93 ATH11K_HTC_CONN_SVC_STATUS_NOT_FOUND = 1,
94 ATH11K_HTC_CONN_SVC_STATUS_FAILED = 2,
95 ATH11K_HTC_CONN_SVC_STATUS_NO_RESOURCES = 3,
96 ATH11K_HTC_CONN_SVC_STATUS_NO_MORE_EP = 4
99 struct ath11k_htc_ready {
104 struct ath11k_htc_ready_extended {
105 struct ath11k_htc_ready base;
109 struct ath11k_htc_conn_svc {
114 struct ath11k_htc_conn_svc_resp {
120 #define ATH11K_GLOBAL_DISABLE_CREDIT_FLOW BIT(1)
122 struct ath11k_htc_setup_complete_extended {
125 u32 max_msgs_per_bundled_recv;
128 struct ath11k_htc_msg {
131 } __packed __aligned(4);
133 enum ath11k_htc_record_id {
134 ATH11K_HTC_RECORD_NULL = 0,
135 ATH11K_HTC_RECORD_CREDITS = 1
138 struct ath11k_htc_record_hdr {
139 u8 id; /* @enum ath11k_htc_record_id */
145 struct ath11k_htc_credit_report {
146 u8 eid; /* @enum ath11k_htc_ep_id */
152 struct ath11k_htc_record {
153 struct ath11k_htc_record_hdr hdr;
154 struct ath11k_htc_credit_report credit_report[];
155 } __packed __aligned(4);
157 enum ath11k_htc_svc_gid {
158 ATH11K_HTC_SVC_GRP_RSVD = 0,
159 ATH11K_HTC_SVC_GRP_WMI = 1,
160 ATH11K_HTC_SVC_GRP_NMI = 2,
161 ATH11K_HTC_SVC_GRP_HTT = 3,
162 ATH11K_HTC_SVC_GRP_CFG = 4,
163 ATH11K_HTC_SVC_GRP_IPA = 5,
164 ATH11K_HTC_SVC_GRP_PKTLOG = 6,
166 ATH11K_HTC_SVC_GRP_TEST = 254,
167 ATH11K_HTC_SVC_GRP_LAST = 255,
170 #define SVC(group, idx) \
171 (int)(((int)(group) << 8) | (int)(idx))
173 enum ath11k_htc_svc_id {
174 /* NOTE: service ID of 0x0000 is reserved and should never be used */
175 ATH11K_HTC_SVC_ID_RESERVED = 0x0000,
176 ATH11K_HTC_SVC_ID_UNUSED = ATH11K_HTC_SVC_ID_RESERVED,
178 ATH11K_HTC_SVC_ID_RSVD_CTRL = SVC(ATH11K_HTC_SVC_GRP_RSVD, 1),
179 ATH11K_HTC_SVC_ID_WMI_CONTROL = SVC(ATH11K_HTC_SVC_GRP_WMI, 0),
180 ATH11K_HTC_SVC_ID_WMI_DATA_BE = SVC(ATH11K_HTC_SVC_GRP_WMI, 1),
181 ATH11K_HTC_SVC_ID_WMI_DATA_BK = SVC(ATH11K_HTC_SVC_GRP_WMI, 2),
182 ATH11K_HTC_SVC_ID_WMI_DATA_VI = SVC(ATH11K_HTC_SVC_GRP_WMI, 3),
183 ATH11K_HTC_SVC_ID_WMI_DATA_VO = SVC(ATH11K_HTC_SVC_GRP_WMI, 4),
184 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 = SVC(ATH11K_HTC_SVC_GRP_WMI, 5),
185 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2 = SVC(ATH11K_HTC_SVC_GRP_WMI, 6),
187 ATH11K_HTC_SVC_ID_NMI_CONTROL = SVC(ATH11K_HTC_SVC_GRP_NMI, 0),
188 ATH11K_HTC_SVC_ID_NMI_DATA = SVC(ATH11K_HTC_SVC_GRP_NMI, 1),
190 ATH11K_HTC_SVC_ID_HTT_DATA_MSG = SVC(ATH11K_HTC_SVC_GRP_HTT, 0),
192 /* raw stream service (i.e. flash, tcmd, calibration apps) */
193 ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS = SVC(ATH11K_HTC_SVC_GRP_TEST, 0),
194 ATH11K_HTC_SVC_ID_IPA_TX = SVC(ATH11K_HTC_SVC_GRP_IPA, 0),
195 ATH11K_HTC_SVC_ID_PKT_LOG = SVC(ATH11K_HTC_SVC_GRP_PKTLOG, 0),
200 enum ath11k_htc_ep_id {
201 ATH11K_HTC_EP_UNUSED = -1,
214 struct ath11k_htc_ep_ops {
215 void (*ep_tx_complete)(struct ath11k_base *, struct sk_buff *);
216 void (*ep_rx_complete)(struct ath11k_base *, struct sk_buff *);
217 void (*ep_tx_credits)(struct ath11k_base *);
220 /* service connection information */
221 struct ath11k_htc_svc_conn_req {
223 struct ath11k_htc_ep_ops ep_ops;
224 int max_send_queue_depth;
227 /* service connection response information */
228 struct ath11k_htc_svc_conn_resp {
231 enum ath11k_htc_ep_id eid;
232 unsigned int max_msg_len;
233 u8 connect_resp_code;
236 #define ATH11K_NUM_CONTROL_TX_BUFFERS 2
237 #define ATH11K_HTC_MAX_LEN 4096
238 #define ATH11K_HTC_MAX_CTRL_MSG_LEN 256
239 #define ATH11K_HTC_WAIT_TIMEOUT_HZ (1 * HZ)
240 #define ATH11K_HTC_CONTROL_BUFFER_SIZE (ATH11K_HTC_MAX_CTRL_MSG_LEN + \
241 sizeof(struct ath11k_htc_hdr))
242 #define ATH11K_HTC_CONN_SVC_TIMEOUT_HZ (1 * HZ)
243 #define ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES 8
245 struct ath11k_htc_ep {
246 struct ath11k_htc *htc;
247 enum ath11k_htc_ep_id eid;
248 enum ath11k_htc_svc_id service_id;
249 struct ath11k_htc_ep_ops ep_ops;
251 int max_tx_queue_depth;
252 int max_ep_message_len;
256 u8 seq_no; /* for debugging */
258 bool tx_credit_flow_enabled;
261 struct ath11k_htc_svc_tx_credits {
263 u8 credit_allocation;
267 struct ath11k_base *ab;
268 struct ath11k_htc_ep endpoint[ATH11K_HTC_EP_COUNT];
270 /* protects endpoints */
273 u8 control_resp_buffer[ATH11K_HTC_MAX_CTRL_MSG_LEN];
274 int control_resp_len;
276 struct completion ctl_resp;
278 int total_transmit_credits;
279 struct ath11k_htc_svc_tx_credits
280 service_alloc_table[ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES];
281 int target_credit_size;
285 int ath11k_htc_init(struct ath11k_base *ar);
286 int ath11k_htc_wait_target(struct ath11k_htc *htc);
287 int ath11k_htc_start(struct ath11k_htc *htc);
288 int ath11k_htc_connect_service(struct ath11k_htc *htc,
289 struct ath11k_htc_svc_conn_req *conn_req,
290 struct ath11k_htc_svc_conn_resp *conn_resp);
291 int ath11k_htc_send(struct ath11k_htc *htc, enum ath11k_htc_ep_id eid,
292 struct sk_buff *packet);
293 struct sk_buff *ath11k_htc_alloc_skb(struct ath11k_base *ar, int size);
294 void ath11k_htc_rx_completion_handler(struct ath11k_base *ar,
295 struct sk_buff *skb);
296 void ath11k_htc_tx_completion_handler(struct ath11k_base *ab,
297 struct sk_buff *skb);