2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2016 Qualcomm Atheros, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <linux/kernel.h>
22 #include <linux/list.h>
23 #include <linux/bug.h>
24 #include <linux/skbuff.h>
25 #include <linux/timer.h>
34 * HTC - host-target control protocol
36 * tx packets are generally <htc_hdr><payload>
37 * rx packets are more complex: <htc_hdr><payload><trailer>
39 * The payload + trailer length is stored in len.
40 * To get payload-only length one needs to payload - trailer_len.
42 * Trailer contains (possibly) multiple <htc_record>.
43 * Each record is a id-len-value.
45 * HTC header flags, control_byte0, control_byte1
46 * have different meaning depending whether its tx
49 * Alignment: htc_hdr, payload and trailer are
53 #define HTC_HOST_MAX_MSG_PER_RX_BUNDLE 8
54 #define HTC_HOST_MAX_MSG_PER_TX_BUNDLE 16
56 enum ath10k_htc_tx_flags {
57 ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01,
58 ATH10K_HTC_FLAG_SEND_BUNDLE = 0x02
61 enum ath10k_htc_rx_flags {
62 ATH10K_HTC_FLAGS_RECV_1MORE_BLOCK = 0x01,
63 ATH10K_HTC_FLAG_TRAILER_PRESENT = 0x02,
64 ATH10K_HTC_FLAG_BUNDLE_MASK = 0xF0
67 struct ath10k_htc_hdr {
68 u8 eid; /* @enum ath10k_htc_ep_id */
69 u8 flags; /* @enum ath10k_htc_tx_flags, ath10k_htc_rx_flags */
72 u8 trailer_len; /* for rx */
76 u8 seq_no; /* for tx */
81 } __packed __aligned(4);
83 enum ath10k_ath10k_htc_msg_id {
84 ATH10K_HTC_MSG_READY_ID = 1,
85 ATH10K_HTC_MSG_CONNECT_SERVICE_ID = 2,
86 ATH10K_HTC_MSG_CONNECT_SERVICE_RESP_ID = 3,
87 ATH10K_HTC_MSG_SETUP_COMPLETE_ID = 4,
88 ATH10K_HTC_MSG_SETUP_COMPLETE_EX_ID = 5,
89 ATH10K_HTC_MSG_SEND_SUSPEND_COMPLETE = 6
92 enum ath10k_htc_version {
93 ATH10K_HTC_VERSION_2P0 = 0x00, /* 2.0 */
94 ATH10K_HTC_VERSION_2P1 = 0x01, /* 2.1 */
97 enum ath10k_htc_conn_flags {
98 ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_FOURTH = 0x0,
99 ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_ONE_HALF = 0x1,
100 ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_THREE_FOURTHS = 0x2,
101 ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_UNITY = 0x3,
102 #define ATH10K_HTC_CONN_FLAGS_THRESHOLD_LEVEL_MASK 0x3
103 ATH10K_HTC_CONN_FLAGS_REDUCE_CREDIT_DRIBBLE = 1 << 2,
104 ATH10K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL = 1 << 3
105 #define ATH10K_HTC_CONN_FLAGS_RECV_ALLOC_MASK 0xFF00
106 #define ATH10K_HTC_CONN_FLAGS_RECV_ALLOC_LSB 8
109 enum ath10k_htc_conn_svc_status {
110 ATH10K_HTC_CONN_SVC_STATUS_SUCCESS = 0,
111 ATH10K_HTC_CONN_SVC_STATUS_NOT_FOUND = 1,
112 ATH10K_HTC_CONN_SVC_STATUS_FAILED = 2,
113 ATH10K_HTC_CONN_SVC_STATUS_NO_RESOURCES = 3,
114 ATH10K_HTC_CONN_SVC_STATUS_NO_MORE_EP = 4
117 enum ath10k_htc_setup_complete_flags {
118 ATH10K_HTC_SETUP_COMPLETE_FLAGS_RX_BNDL_EN = 1
121 struct ath10k_ath10k_htc_msg_hdr {
122 __le16 message_id; /* @enum htc_message_id */
125 struct ath10k_htc_unknown {
130 struct ath10k_htc_ready {
137 struct ath10k_htc_ready_extended {
138 struct ath10k_htc_ready base;
139 u8 htc_version; /* @enum ath10k_htc_version */
140 u8 max_msgs_per_htc_bundle;
145 struct ath10k_htc_conn_svc {
147 __le16 flags; /* @enum ath10k_htc_conn_flags */
152 struct ath10k_htc_conn_svc_response {
154 u8 status; /* @enum ath10k_htc_conn_svc_status */
159 struct ath10k_htc_setup_complete_extended {
162 __le32 flags; /* @enum htc_setup_complete_flags */
163 u8 max_msgs_per_bundled_recv;
169 struct ath10k_htc_msg {
170 struct ath10k_ath10k_htc_msg_hdr hdr;
173 struct ath10k_htc_conn_svc connect_service;
174 struct ath10k_htc_ready ready;
175 struct ath10k_htc_ready_extended ready_ext;
176 struct ath10k_htc_unknown unknown;
177 struct ath10k_htc_setup_complete_extended setup_complete_ext;
180 struct ath10k_htc_conn_svc_response connect_service_response;
182 } __packed __aligned(4);
184 enum ath10k_ath10k_htc_record_id {
185 ATH10K_HTC_RECORD_NULL = 0,
186 ATH10K_HTC_RECORD_CREDITS = 1,
187 ATH10K_HTC_RECORD_LOOKAHEAD = 2,
188 ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE = 3,
191 struct ath10k_ath10k_htc_record_hdr {
192 u8 id; /* @enum ath10k_ath10k_htc_record_id */
198 struct ath10k_htc_credit_report {
199 u8 eid; /* @enum ath10k_htc_ep_id */
205 struct ath10k_htc_lookahead_report {
217 struct ath10k_htc_lookahead_bundle {
221 struct ath10k_htc_record {
222 struct ath10k_ath10k_htc_record_hdr hdr;
224 struct ath10k_htc_credit_report credit_report[0];
225 struct ath10k_htc_lookahead_report lookahead_report[0];
226 struct ath10k_htc_lookahead_bundle lookahead_bundle[0];
229 } __packed __aligned(4);
232 * note: the trailer offset is dynamic depending
233 * on payload length. this is only a struct layout draft
235 struct ath10k_htc_frame {
236 struct ath10k_htc_hdr hdr;
238 struct ath10k_htc_msg msg;
241 struct ath10k_htc_record trailer[0];
242 } __packed __aligned(4);
244 /*******************/
245 /* Host-side stuff */
246 /*******************/
248 enum ath10k_htc_svc_gid {
249 ATH10K_HTC_SVC_GRP_RSVD = 0,
250 ATH10K_HTC_SVC_GRP_WMI = 1,
251 ATH10K_HTC_SVC_GRP_NMI = 2,
252 ATH10K_HTC_SVC_GRP_HTT = 3,
253 ATH10K_LOG_SERVICE_GROUP = 6,
255 ATH10K_HTC_SVC_GRP_TEST = 254,
256 ATH10K_HTC_SVC_GRP_LAST = 255,
259 #define SVC(group, idx) \
260 (int)(((int)(group) << 8) | (int)(idx))
262 enum ath10k_htc_svc_id {
263 /* NOTE: service ID of 0x0000 is reserved and should never be used */
264 ATH10K_HTC_SVC_ID_RESERVED = 0x0000,
265 ATH10K_HTC_SVC_ID_UNUSED = ATH10K_HTC_SVC_ID_RESERVED,
267 ATH10K_HTC_SVC_ID_RSVD_CTRL = SVC(ATH10K_HTC_SVC_GRP_RSVD, 1),
268 ATH10K_HTC_SVC_ID_WMI_CONTROL = SVC(ATH10K_HTC_SVC_GRP_WMI, 0),
269 ATH10K_HTC_SVC_ID_WMI_DATA_BE = SVC(ATH10K_HTC_SVC_GRP_WMI, 1),
270 ATH10K_HTC_SVC_ID_WMI_DATA_BK = SVC(ATH10K_HTC_SVC_GRP_WMI, 2),
271 ATH10K_HTC_SVC_ID_WMI_DATA_VI = SVC(ATH10K_HTC_SVC_GRP_WMI, 3),
272 ATH10K_HTC_SVC_ID_WMI_DATA_VO = SVC(ATH10K_HTC_SVC_GRP_WMI, 4),
274 ATH10K_HTC_SVC_ID_NMI_CONTROL = SVC(ATH10K_HTC_SVC_GRP_NMI, 0),
275 ATH10K_HTC_SVC_ID_NMI_DATA = SVC(ATH10K_HTC_SVC_GRP_NMI, 1),
277 ATH10K_HTC_SVC_ID_HTT_DATA_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 0),
279 ATH10K_HTC_SVC_ID_HTT_DATA2_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 1),
280 ATH10K_HTC_SVC_ID_HTT_DATA3_MSG = SVC(ATH10K_HTC_SVC_GRP_HTT, 2),
281 ATH10K_HTC_SVC_ID_HTT_LOG_MSG = SVC(ATH10K_LOG_SERVICE_GROUP, 0),
282 /* raw stream service (i.e. flash, tcmd, calibration apps) */
283 ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS = SVC(ATH10K_HTC_SVC_GRP_TEST, 0),
288 enum ath10k_htc_ep_id {
289 ATH10K_HTC_EP_UNUSED = -1,
302 struct ath10k_htc_ops {
303 void (*target_send_suspend_complete)(struct ath10k *ar);
306 struct ath10k_htc_ep_ops {
307 void (*ep_tx_complete)(struct ath10k *, struct sk_buff *);
308 void (*ep_rx_complete)(struct ath10k *, struct sk_buff *);
309 void (*ep_tx_credits)(struct ath10k *);
312 /* service connection information */
313 struct ath10k_htc_svc_conn_req {
315 struct ath10k_htc_ep_ops ep_ops;
316 int max_send_queue_depth;
319 /* service connection response information */
320 struct ath10k_htc_svc_conn_resp {
323 enum ath10k_htc_ep_id eid;
324 unsigned int max_msg_len;
325 u8 connect_resp_code;
328 #define ATH10K_NUM_CONTROL_TX_BUFFERS 2
329 #define ATH10K_HTC_MAX_LEN 4096
330 #define ATH10K_HTC_MAX_CTRL_MSG_LEN 256
331 #define ATH10K_HTC_WAIT_TIMEOUT_HZ (1 * HZ)
332 #define ATH10K_HTC_CONTROL_BUFFER_SIZE (ATH10K_HTC_MAX_CTRL_MSG_LEN + \
333 sizeof(struct ath10k_htc_hdr))
334 #define ATH10K_HTC_CONN_SVC_TIMEOUT_HZ (1 * HZ)
336 struct ath10k_htc_ep {
337 struct ath10k_htc *htc;
338 enum ath10k_htc_ep_id eid;
339 enum ath10k_htc_svc_id service_id;
340 struct ath10k_htc_ep_ops ep_ops;
342 int max_tx_queue_depth;
343 int max_ep_message_len;
347 u8 seq_no; /* for debugging */
349 bool tx_credit_flow_enabled;
352 struct ath10k_htc_svc_tx_credits {
354 u8 credit_allocation;
359 struct ath10k_htc_ep endpoint[ATH10K_HTC_EP_COUNT];
361 /* protects endpoints */
364 struct ath10k_htc_ops htc_ops;
366 u8 control_resp_buffer[ATH10K_HTC_MAX_CTRL_MSG_LEN];
367 int control_resp_len;
369 struct completion ctl_resp;
371 int total_transmit_credits;
372 int target_credit_size;
373 u8 max_msgs_per_htc_bundle;
376 int ath10k_htc_init(struct ath10k *ar);
377 int ath10k_htc_wait_target(struct ath10k_htc *htc);
378 int ath10k_htc_start(struct ath10k_htc *htc);
379 int ath10k_htc_connect_service(struct ath10k_htc *htc,
380 struct ath10k_htc_svc_conn_req *conn_req,
381 struct ath10k_htc_svc_conn_resp *conn_resp);
382 int ath10k_htc_send(struct ath10k_htc *htc, enum ath10k_htc_ep_id eid,
383 struct sk_buff *packet);
384 struct sk_buff *ath10k_htc_alloc_skb(struct ath10k *ar, int size);
385 void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb);
386 void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb);
387 void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep,
388 struct sk_buff *skb);
389 int ath10k_htc_process_trailer(struct ath10k_htc *htc,
392 enum ath10k_htc_ep_id src_eid,
393 void *next_lookaheads,
394 int *next_lookaheads_len);