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
71 enum ath11k_htc_version
{
72 ATH11K_HTC_VERSION_2P0
= 0x00, /* 2.0 */
73 ATH11K_HTC_VERSION_2P1
= 0x01, /* 2.1 */
76 #define ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK GENMASK(1, 0)
77 #define ATH11K_HTC_CONN_FLAGS_RECV_ALLOC GENMASK(15, 8)
79 enum ath11k_htc_conn_flags
{
80 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH
= 0x0,
81 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF
= 0x1,
82 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS
= 0x2,
83 ATH11K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY
= 0x3,
84 ATH11K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE
= 1 << 2,
85 ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL
= 1 << 3
88 enum ath11k_htc_conn_svc_status
{
89 ATH11K_HTC_CONN_SVC_STATUS_SUCCESS
= 0,
90 ATH11K_HTC_CONN_SVC_STATUS_NOT_FOUND
= 1,
91 ATH11K_HTC_CONN_SVC_STATUS_FAILED
= 2,
92 ATH11K_HTC_CONN_SVC_STATUS_NO_RESOURCES
= 3,
93 ATH11K_HTC_CONN_SVC_STATUS_NO_MORE_EP
= 4
96 struct ath11k_htc_ready
{
101 struct ath11k_htc_ready_extended
{
102 struct ath11k_htc_ready base
;
106 struct ath11k_htc_conn_svc
{
111 struct ath11k_htc_conn_svc_resp
{
117 struct ath11k_htc_setup_complete_extended
{
120 u32 max_msgs_per_bundled_recv
;
123 struct ath11k_htc_msg
{
126 } __packed
__aligned(4);
128 enum ath11k_htc_record_id
{
129 ATH11K_HTC_RECORD_NULL
= 0,
130 ATH11K_HTC_RECORD_CREDITS
= 1
133 struct ath11k_htc_record_hdr
{
134 u8 id
; /* @enum ath11k_htc_record_id */
140 struct ath11k_htc_credit_report
{
141 u8 eid
; /* @enum ath11k_htc_ep_id */
147 struct ath11k_htc_record
{
148 struct ath11k_htc_record_hdr hdr
;
150 struct ath11k_htc_credit_report credit_report
[0];
153 } __packed
__aligned(4);
155 /* note: the trailer offset is dynamic depending
156 * on payload length. this is only a struct layout draft
158 struct ath11k_htc_frame
{
159 struct ath11k_htc_hdr hdr
;
161 struct ath11k_htc_msg msg
;
164 struct ath11k_htc_record trailer
[0];
165 } __packed
__aligned(4);
167 enum ath11k_htc_svc_gid
{
168 ATH11K_HTC_SVC_GRP_RSVD
= 0,
169 ATH11K_HTC_SVC_GRP_WMI
= 1,
170 ATH11K_HTC_SVC_GRP_NMI
= 2,
171 ATH11K_HTC_SVC_GRP_HTT
= 3,
172 ATH11K_HTC_SVC_GRP_CFG
= 4,
173 ATH11K_HTC_SVC_GRP_IPA
= 5,
174 ATH11K_HTC_SVC_GRP_PKTLOG
= 6,
176 ATH11K_HTC_SVC_GRP_TEST
= 254,
177 ATH11K_HTC_SVC_GRP_LAST
= 255,
180 #define SVC(group, idx) \
181 (int)(((int)(group) << 8) | (int)(idx))
183 enum ath11k_htc_svc_id
{
184 /* NOTE: service ID of 0x0000 is reserved and should never be used */
185 ATH11K_HTC_SVC_ID_RESERVED
= 0x0000,
186 ATH11K_HTC_SVC_ID_UNUSED
= ATH11K_HTC_SVC_ID_RESERVED
,
188 ATH11K_HTC_SVC_ID_RSVD_CTRL
= SVC(ATH11K_HTC_SVC_GRP_RSVD
, 1),
189 ATH11K_HTC_SVC_ID_WMI_CONTROL
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 0),
190 ATH11K_HTC_SVC_ID_WMI_DATA_BE
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 1),
191 ATH11K_HTC_SVC_ID_WMI_DATA_BK
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 2),
192 ATH11K_HTC_SVC_ID_WMI_DATA_VI
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 3),
193 ATH11K_HTC_SVC_ID_WMI_DATA_VO
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 4),
194 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 5),
195 ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2
= SVC(ATH11K_HTC_SVC_GRP_WMI
, 6),
197 ATH11K_HTC_SVC_ID_NMI_CONTROL
= SVC(ATH11K_HTC_SVC_GRP_NMI
, 0),
198 ATH11K_HTC_SVC_ID_NMI_DATA
= SVC(ATH11K_HTC_SVC_GRP_NMI
, 1),
200 ATH11K_HTC_SVC_ID_HTT_DATA_MSG
= SVC(ATH11K_HTC_SVC_GRP_HTT
, 0),
202 /* raw stream service (i.e. flash, tcmd, calibration apps) */
203 ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS
= SVC(ATH11K_HTC_SVC_GRP_TEST
, 0),
204 ATH11K_HTC_SVC_ID_IPA_TX
= SVC(ATH11K_HTC_SVC_GRP_IPA
, 0),
205 ATH11K_HTC_SVC_ID_PKT_LOG
= SVC(ATH11K_HTC_SVC_GRP_PKTLOG
, 0),
210 enum ath11k_htc_ep_id
{
211 ATH11K_HTC_EP_UNUSED
= -1,
224 struct ath11k_htc_ops
{
225 void (*target_send_suspend_complete
)(struct ath11k_base
*ar
);
228 struct ath11k_htc_ep_ops
{
229 void (*ep_tx_complete
)(struct ath11k_base
*, struct sk_buff
*);
230 void (*ep_rx_complete
)(struct ath11k_base
*, struct sk_buff
*);
231 void (*ep_tx_credits
)(struct ath11k_base
*);
234 /* service connection information */
235 struct ath11k_htc_svc_conn_req
{
237 struct ath11k_htc_ep_ops ep_ops
;
238 int max_send_queue_depth
;
241 /* service connection response information */
242 struct ath11k_htc_svc_conn_resp
{
245 enum ath11k_htc_ep_id eid
;
246 unsigned int max_msg_len
;
247 u8 connect_resp_code
;
250 #define ATH11K_NUM_CONTROL_TX_BUFFERS 2
251 #define ATH11K_HTC_MAX_LEN 4096
252 #define ATH11K_HTC_MAX_CTRL_MSG_LEN 256
253 #define ATH11K_HTC_WAIT_TIMEOUT_HZ (1 * HZ)
254 #define ATH11K_HTC_CONTROL_BUFFER_SIZE (ATH11K_HTC_MAX_CTRL_MSG_LEN + \
255 sizeof(struct ath11k_htc_hdr))
256 #define ATH11K_HTC_CONN_SVC_TIMEOUT_HZ (1 * HZ)
257 #define ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES 8
259 struct ath11k_htc_ep
{
260 struct ath11k_htc
*htc
;
261 enum ath11k_htc_ep_id eid
;
262 enum ath11k_htc_svc_id service_id
;
263 struct ath11k_htc_ep_ops ep_ops
;
265 int max_tx_queue_depth
;
266 int max_ep_message_len
;
270 u8 seq_no
; /* for debugging */
272 bool tx_credit_flow_enabled
;
275 struct ath11k_htc_svc_tx_credits
{
277 u8 credit_allocation
;
281 struct ath11k_base
*ab
;
282 struct ath11k_htc_ep endpoint
[ATH11K_HTC_EP_COUNT
];
284 /* protects endpoints */
287 struct ath11k_htc_ops htc_ops
;
289 u8 control_resp_buffer
[ATH11K_HTC_MAX_CTRL_MSG_LEN
];
290 int control_resp_len
;
292 struct completion ctl_resp
;
294 int total_transmit_credits
;
295 struct ath11k_htc_svc_tx_credits
296 service_alloc_table
[ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES
];
297 int target_credit_size
;
301 int ath11k_htc_init(struct ath11k_base
*ar
);
302 int ath11k_htc_wait_target(struct ath11k_htc
*htc
);
303 int ath11k_htc_start(struct ath11k_htc
*htc
);
304 int ath11k_htc_connect_service(struct ath11k_htc
*htc
,
305 struct ath11k_htc_svc_conn_req
*conn_req
,
306 struct ath11k_htc_svc_conn_resp
*conn_resp
);
307 int ath11k_htc_send(struct ath11k_htc
*htc
, enum ath11k_htc_ep_id eid
,
308 struct sk_buff
*packet
);
309 struct sk_buff
*ath11k_htc_alloc_skb(struct ath11k_base
*ar
, int size
);
310 void ath11k_htc_rx_completion_handler(struct ath11k_base
*ar
,
311 struct sk_buff
*skb
);