1 /* SPDX-License-Identifier: BSD-3-Clause-Clear */
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
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>
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)
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)
31 #define HTC_READY_EX_MSG_HTCVERSION GENMASK(7, 0)
32 #define HTC_READY_EX_MSG_MAXMSGSPERHTCBUNDLE GENMASK(15, 8)
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)
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)
47 enum ath11k_htc_tx_flags
{
48 ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE
= 0x01,
49 ATH11K_HTC_FLAG_SEND_BUNDLE
= 0x02
52 enum ath11k_htc_rx_flags
{
53 ATH11K_HTC_FLAG_TRAILER_PRESENT
= 0x02,
54 ATH11K_HTC_FLAG_BUNDLE_MASK
= 0xF0
57 struct ath11k_htc_hdr
{
60 } __packed
__aligned(4);
62 enum 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,
73 enum ath11k_htc_version
{
74 ATH11K_HTC_VERSION_2P0
= 0x00, /* 2.0 */
75 ATH11K_HTC_VERSION_2P1
= 0x01, /* 2.1 */
78 #define ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK GENMASK(1, 0)
79 #define ATH11K_HTC_CONN_FLAGS_RECV_ALLOC GENMASK(15, 8)
81 enum 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
90 enum 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
98 struct ath11k_htc_ready
{
103 struct ath11k_htc_ready_extended
{
104 struct ath11k_htc_ready base
;
108 struct ath11k_htc_conn_svc
{
113 struct ath11k_htc_conn_svc_resp
{
119 struct ath11k_htc_setup_complete_extended
{
122 u32 max_msgs_per_bundled_recv
;
125 struct ath11k_htc_msg
{
128 } __packed
__aligned(4);
130 enum ath11k_htc_record_id
{
131 ATH11K_HTC_RECORD_NULL
= 0,
132 ATH11K_HTC_RECORD_CREDITS
= 1
135 struct ath11k_htc_record_hdr
{
136 u8 id
; /* @enum ath11k_htc_record_id */
142 struct ath11k_htc_credit_report
{
143 u8 eid
; /* @enum ath11k_htc_ep_id */
149 struct ath11k_htc_record
{
150 struct ath11k_htc_record_hdr hdr
;
152 struct ath11k_htc_credit_report credit_report
[0];
155 } __packed
__aligned(4);
157 /* note: the trailer offset is dynamic depending
158 * on payload length. this is only a struct layout draft
160 struct ath11k_htc_frame
{
161 struct ath11k_htc_hdr hdr
;
163 struct ath11k_htc_msg msg
;
166 struct ath11k_htc_record trailer
[0];
167 } __packed
__aligned(4);
169 enum 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,
178 ATH11K_HTC_SVC_GRP_TEST
= 254,
179 ATH11K_HTC_SVC_GRP_LAST
= 255,
182 #define SVC(group, idx) \
183 (int)(((int)(group) << 8) | (int)(idx))
185 enum 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
,
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),
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),
202 ATH11K_HTC_SVC_ID_HTT_DATA_MSG
= SVC(ATH11K_HTC_SVC_GRP_HTT
, 0),
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),
212 enum ath11k_htc_ep_id
{
213 ATH11K_HTC_EP_UNUSED
= -1,
226 struct 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
*);
232 /* service connection information */
233 struct ath11k_htc_svc_conn_req
{
235 struct ath11k_htc_ep_ops ep_ops
;
236 int max_send_queue_depth
;
239 /* service connection response information */
240 struct ath11k_htc_svc_conn_resp
{
243 enum ath11k_htc_ep_id eid
;
244 unsigned int max_msg_len
;
245 u8 connect_resp_code
;
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
257 struct 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
;
263 int max_tx_queue_depth
;
264 int max_ep_message_len
;
268 u8 seq_no
; /* for debugging */
270 bool tx_credit_flow_enabled
;
273 struct ath11k_htc_svc_tx_credits
{
275 u8 credit_allocation
;
279 struct ath11k_base
*ab
;
280 struct ath11k_htc_ep endpoint
[ATH11K_HTC_EP_COUNT
];
282 /* protects endpoints */
285 u8 control_resp_buffer
[ATH11K_HTC_MAX_CTRL_MSG_LEN
];
286 int control_resp_len
;
288 struct completion ctl_resp
;
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
;
297 int ath11k_htc_init(struct ath11k_base
*ar
);
298 int ath11k_htc_wait_target(struct ath11k_htc
*htc
);
299 int ath11k_htc_start(struct ath11k_htc
*htc
);
300 int 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
);
303 int ath11k_htc_send(struct ath11k_htc
*htc
, enum ath11k_htc_ep_id eid
,
304 struct sk_buff
*packet
);
305 struct sk_buff
*ath11k_htc_alloc_skb(struct ath11k_base
*ar
, int size
);
306 void ath11k_htc_rx_completion_handler(struct ath11k_base
*ar
,
307 struct sk_buff
*skb
);