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fb9987d0 | 1 | /* |
5b68138e | 2 | * Copyright (c) 2010-2011 Atheros Communications Inc. |
fb9987d0 S |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include "htc.h" | |
18 | ||
19 | static const char *wmi_cmd_to_name(enum wmi_cmd_id wmi_cmd) | |
20 | { | |
21 | switch (wmi_cmd) { | |
22 | case WMI_ECHO_CMDID: | |
23 | return "WMI_ECHO_CMDID"; | |
24 | case WMI_ACCESS_MEMORY_CMDID: | |
25 | return "WMI_ACCESS_MEMORY_CMDID"; | |
29bbfb24 SM |
26 | case WMI_GET_FW_VERSION: |
27 | return "WMI_GET_FW_VERSION"; | |
fb9987d0 S |
28 | case WMI_DISABLE_INTR_CMDID: |
29 | return "WMI_DISABLE_INTR_CMDID"; | |
30 | case WMI_ENABLE_INTR_CMDID: | |
31 | return "WMI_ENABLE_INTR_CMDID"; | |
fb9987d0 S |
32 | case WMI_ATH_INIT_CMDID: |
33 | return "WMI_ATH_INIT_CMDID"; | |
34 | case WMI_ABORT_TXQ_CMDID: | |
35 | return "WMI_ABORT_TXQ_CMDID"; | |
36 | case WMI_STOP_TX_DMA_CMDID: | |
37 | return "WMI_STOP_TX_DMA_CMDID"; | |
fb9987d0 S |
38 | case WMI_ABORT_TX_DMA_CMDID: |
39 | return "WMI_ABORT_TX_DMA_CMDID"; | |
40 | case WMI_DRAIN_TXQ_CMDID: | |
41 | return "WMI_DRAIN_TXQ_CMDID"; | |
42 | case WMI_DRAIN_TXQ_ALL_CMDID: | |
43 | return "WMI_DRAIN_TXQ_ALL_CMDID"; | |
44 | case WMI_START_RECV_CMDID: | |
45 | return "WMI_START_RECV_CMDID"; | |
46 | case WMI_STOP_RECV_CMDID: | |
47 | return "WMI_STOP_RECV_CMDID"; | |
48 | case WMI_FLUSH_RECV_CMDID: | |
49 | return "WMI_FLUSH_RECV_CMDID"; | |
50 | case WMI_SET_MODE_CMDID: | |
51 | return "WMI_SET_MODE_CMDID"; | |
fb9987d0 S |
52 | case WMI_NODE_CREATE_CMDID: |
53 | return "WMI_NODE_CREATE_CMDID"; | |
54 | case WMI_NODE_REMOVE_CMDID: | |
55 | return "WMI_NODE_REMOVE_CMDID"; | |
56 | case WMI_VAP_REMOVE_CMDID: | |
57 | return "WMI_VAP_REMOVE_CMDID"; | |
58 | case WMI_VAP_CREATE_CMDID: | |
59 | return "WMI_VAP_CREATE_CMDID"; | |
fb9987d0 S |
60 | case WMI_REG_READ_CMDID: |
61 | return "WMI_REG_READ_CMDID"; | |
62 | case WMI_REG_WRITE_CMDID: | |
63 | return "WMI_REG_WRITE_CMDID"; | |
64 | case WMI_RC_STATE_CHANGE_CMDID: | |
65 | return "WMI_RC_STATE_CHANGE_CMDID"; | |
66 | case WMI_RC_RATE_UPDATE_CMDID: | |
67 | return "WMI_RC_RATE_UPDATE_CMDID"; | |
fb9987d0 S |
68 | case WMI_TARGET_IC_UPDATE_CMDID: |
69 | return "WMI_TARGET_IC_UPDATE_CMDID"; | |
fb9987d0 S |
70 | case WMI_TX_AGGR_ENABLE_CMDID: |
71 | return "WMI_TX_AGGR_ENABLE_CMDID"; | |
72 | case WMI_TGT_DETACH_CMDID: | |
73 | return "WMI_TGT_DETACH_CMDID"; | |
fbc29d6c SM |
74 | case WMI_NODE_UPDATE_CMDID: |
75 | return "WMI_NODE_UPDATE_CMDID"; | |
76 | case WMI_INT_STATS_CMDID: | |
77 | return "WMI_INT_STATS_CMDID"; | |
78 | case WMI_TX_STATS_CMDID: | |
79 | return "WMI_TX_STATS_CMDID"; | |
80 | case WMI_RX_STATS_CMDID: | |
81 | return "WMI_RX_STATS_CMDID"; | |
a55bb94a SM |
82 | case WMI_BITRATE_MASK_CMDID: |
83 | return "WMI_BITRATE_MASK_CMDID"; | |
fb9987d0 S |
84 | } |
85 | ||
86 | return "Bogus"; | |
87 | } | |
88 | ||
89 | struct wmi *ath9k_init_wmi(struct ath9k_htc_priv *priv) | |
90 | { | |
91 | struct wmi *wmi; | |
92 | ||
93 | wmi = kzalloc(sizeof(struct wmi), GFP_KERNEL); | |
94 | if (!wmi) | |
95 | return NULL; | |
96 | ||
97 | wmi->drv_priv = priv; | |
98 | wmi->stopped = false; | |
f4c88991 | 99 | skb_queue_head_init(&wmi->wmi_event_queue); |
859c3ca1 SM |
100 | spin_lock_init(&wmi->wmi_lock); |
101 | spin_lock_init(&wmi->event_lock); | |
fb9987d0 | 102 | mutex_init(&wmi->op_mutex); |
4a22fe10 | 103 | mutex_init(&wmi->multi_write_mutex); |
fb9987d0 | 104 | init_completion(&wmi->cmd_wait); |
859c3ca1 | 105 | INIT_LIST_HEAD(&wmi->pending_tx_events); |
f4c88991 SM |
106 | tasklet_init(&wmi->wmi_event_tasklet, ath9k_wmi_event_tasklet, |
107 | (unsigned long)wmi); | |
fb9987d0 S |
108 | |
109 | return wmi; | |
110 | } | |
111 | ||
112 | void ath9k_deinit_wmi(struct ath9k_htc_priv *priv) | |
113 | { | |
114 | struct wmi *wmi = priv->wmi; | |
115 | ||
116 | mutex_lock(&wmi->op_mutex); | |
117 | wmi->stopped = true; | |
118 | mutex_unlock(&wmi->op_mutex); | |
119 | ||
120 | kfree(priv->wmi); | |
121 | } | |
122 | ||
f4c88991 | 123 | void ath9k_wmi_event_drain(struct ath9k_htc_priv *priv) |
fb9987d0 | 124 | { |
f4c88991 | 125 | unsigned long flags; |
fb9987d0 | 126 | |
f4c88991 SM |
127 | tasklet_kill(&priv->wmi->wmi_event_tasklet); |
128 | spin_lock_irqsave(&priv->wmi->wmi_lock, flags); | |
129 | __skb_queue_purge(&priv->wmi->wmi_event_queue); | |
130 | spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags); | |
131 | } | |
132 | ||
133 | void ath9k_wmi_event_tasklet(unsigned long data) | |
134 | { | |
135 | struct wmi *wmi = (struct wmi *)data; | |
136 | struct ath9k_htc_priv *priv = wmi->drv_priv; | |
137 | struct wmi_cmd_hdr *hdr; | |
138 | void *wmi_event; | |
139 | struct wmi_event_swba *swba; | |
140 | struct sk_buff *skb = NULL; | |
141 | unsigned long flags; | |
142 | u16 cmd_id; | |
f4c88991 SM |
143 | |
144 | do { | |
145 | spin_lock_irqsave(&wmi->wmi_lock, flags); | |
146 | skb = __skb_dequeue(&wmi->wmi_event_queue); | |
147 | if (!skb) { | |
148 | spin_unlock_irqrestore(&wmi->wmi_lock, flags); | |
149 | return; | |
150 | } | |
151 | spin_unlock_irqrestore(&wmi->wmi_lock, flags); | |
152 | ||
153 | hdr = (struct wmi_cmd_hdr *) skb->data; | |
154 | cmd_id = be16_to_cpu(hdr->command_id); | |
155 | wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr)); | |
156 | ||
157 | switch (cmd_id) { | |
158 | case WMI_SWBA_EVENTID: | |
159 | swba = (struct wmi_event_swba *) wmi_event; | |
160 | ath9k_htc_swba(priv, swba); | |
161 | break; | |
162 | case WMI_FATAL_EVENTID: | |
163 | ieee80211_queue_work(wmi->drv_priv->hw, | |
164 | &wmi->drv_priv->fatal_work); | |
165 | break; | |
27876a29 SM |
166 | case WMI_TXSTATUS_EVENTID: |
167 | spin_lock_bh(&priv->tx.tx_lock); | |
168 | if (priv->tx.flags & ATH9K_HTC_OP_TX_DRAIN) { | |
169 | spin_unlock_bh(&priv->tx.tx_lock); | |
170 | break; | |
171 | } | |
172 | spin_unlock_bh(&priv->tx.tx_lock); | |
173 | ||
174 | ath9k_htc_txstatus(priv, wmi_event); | |
175 | break; | |
f4c88991 SM |
176 | default: |
177 | break; | |
178 | } | |
179 | ||
180 | kfree_skb(skb); | |
181 | } while (1); | |
fb9987d0 S |
182 | } |
183 | ||
73908674 SM |
184 | void ath9k_fatal_work(struct work_struct *work) |
185 | { | |
186 | struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, | |
187 | fatal_work); | |
188 | struct ath_common *common = ath9k_hw_common(priv->ah); | |
189 | ||
d2182b69 | 190 | ath_dbg(common, FATAL, "FATAL Event received, resetting device\n"); |
73908674 SM |
191 | ath9k_htc_reset(priv); |
192 | } | |
193 | ||
fb9987d0 S |
194 | static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb) |
195 | { | |
196 | skb_pull(skb, sizeof(struct wmi_cmd_hdr)); | |
197 | ||
198 | if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0) | |
199 | memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len); | |
200 | ||
201 | complete(&wmi->cmd_wait); | |
202 | } | |
203 | ||
204 | static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb, | |
205 | enum htc_endpoint_id epid) | |
206 | { | |
207 | struct wmi *wmi = (struct wmi *) priv; | |
208 | struct wmi_cmd_hdr *hdr; | |
209 | u16 cmd_id; | |
210 | ||
211 | if (unlikely(wmi->stopped)) | |
212 | goto free_skb; | |
213 | ||
214 | hdr = (struct wmi_cmd_hdr *) skb->data; | |
215 | cmd_id = be16_to_cpu(hdr->command_id); | |
216 | ||
217 | if (cmd_id & 0x1000) { | |
f4c88991 SM |
218 | spin_lock(&wmi->wmi_lock); |
219 | __skb_queue_tail(&wmi->wmi_event_queue, skb); | |
220 | spin_unlock(&wmi->wmi_lock); | |
221 | tasklet_schedule(&wmi->wmi_event_tasklet); | |
fb9987d0 S |
222 | return; |
223 | } | |
224 | ||
6ce34ec1 S |
225 | /* Check if there has been a timeout. */ |
226 | spin_lock(&wmi->wmi_lock); | |
227 | if (cmd_id != wmi->last_cmd_id) { | |
228 | spin_unlock(&wmi->wmi_lock); | |
229 | goto free_skb; | |
230 | } | |
231 | spin_unlock(&wmi->wmi_lock); | |
232 | ||
fb9987d0 S |
233 | /* WMI command response */ |
234 | ath9k_wmi_rsp_callback(wmi, skb); | |
235 | ||
236 | free_skb: | |
e6c6d33c | 237 | kfree_skb(skb); |
fb9987d0 S |
238 | } |
239 | ||
240 | static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb, | |
241 | enum htc_endpoint_id epid, bool txok) | |
242 | { | |
0fa35a58 | 243 | kfree_skb(skb); |
fb9987d0 S |
244 | } |
245 | ||
246 | int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi, | |
247 | enum htc_endpoint_id *wmi_ctrl_epid) | |
248 | { | |
249 | struct htc_service_connreq connect; | |
250 | int ret; | |
251 | ||
252 | wmi->htc = htc; | |
253 | ||
254 | memset(&connect, 0, sizeof(connect)); | |
255 | ||
256 | connect.ep_callbacks.priv = wmi; | |
257 | connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx; | |
258 | connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx; | |
259 | connect.service_id = WMI_CONTROL_SVC; | |
260 | ||
261 | ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid); | |
262 | if (ret) | |
263 | return ret; | |
264 | ||
265 | *wmi_ctrl_epid = wmi->ctrl_epid; | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static int ath9k_wmi_cmd_issue(struct wmi *wmi, | |
271 | struct sk_buff *skb, | |
272 | enum wmi_cmd_id cmd, u16 len) | |
273 | { | |
274 | struct wmi_cmd_hdr *hdr; | |
275 | ||
276 | hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr)); | |
277 | hdr->command_id = cpu_to_be16(cmd); | |
278 | hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id); | |
279 | ||
d67ee533 | 280 | return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid); |
fb9987d0 S |
281 | } |
282 | ||
283 | int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id, | |
284 | u8 *cmd_buf, u32 cmd_len, | |
285 | u8 *rsp_buf, u32 rsp_len, | |
286 | u32 timeout) | |
287 | { | |
288 | struct ath_hw *ah = wmi->drv_priv->ah; | |
289 | struct ath_common *common = ath9k_hw_common(ah); | |
290 | u16 headroom = sizeof(struct htc_frame_hdr) + | |
291 | sizeof(struct wmi_cmd_hdr); | |
292 | struct sk_buff *skb; | |
293 | u8 *data; | |
294 | int time_left, ret = 0; | |
6ce34ec1 | 295 | unsigned long flags; |
fb9987d0 | 296 | |
97dcec57 | 297 | if (ah->ah_flags & AH_UNPLUGGED) |
a3be14b7 S |
298 | return 0; |
299 | ||
0fa35a58 | 300 | skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC); |
fb9987d0 S |
301 | if (!skb) |
302 | return -ENOMEM; | |
303 | ||
304 | skb_reserve(skb, headroom); | |
305 | ||
306 | if (cmd_len != 0 && cmd_buf != NULL) { | |
307 | data = (u8 *) skb_put(skb, cmd_len); | |
308 | memcpy(data, cmd_buf, cmd_len); | |
309 | } | |
310 | ||
311 | mutex_lock(&wmi->op_mutex); | |
312 | ||
313 | /* check if wmi stopped flag is set */ | |
314 | if (unlikely(wmi->stopped)) { | |
315 | ret = -EPROTO; | |
316 | goto out; | |
317 | } | |
318 | ||
319 | /* record the rsp buffer and length */ | |
320 | wmi->cmd_rsp_buf = rsp_buf; | |
321 | wmi->cmd_rsp_len = rsp_len; | |
322 | ||
6ce34ec1 S |
323 | spin_lock_irqsave(&wmi->wmi_lock, flags); |
324 | wmi->last_cmd_id = cmd_id; | |
325 | spin_unlock_irqrestore(&wmi->wmi_lock, flags); | |
326 | ||
0d36d71d S |
327 | ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len); |
328 | if (ret) | |
329 | goto out; | |
330 | ||
fb9987d0 S |
331 | time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout); |
332 | if (!time_left) { | |
d2182b69 | 333 | ath_dbg(common, WMI, "Timeout waiting for WMI command: %s\n", |
226afe68 | 334 | wmi_cmd_to_name(cmd_id)); |
fb9987d0 S |
335 | mutex_unlock(&wmi->op_mutex); |
336 | return -ETIMEDOUT; | |
337 | } | |
338 | ||
339 | mutex_unlock(&wmi->op_mutex); | |
340 | ||
341 | return 0; | |
342 | ||
343 | out: | |
d2182b69 | 344 | ath_dbg(common, WMI, "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id)); |
fb9987d0 | 345 | mutex_unlock(&wmi->op_mutex); |
0fa35a58 | 346 | kfree_skb(skb); |
fb9987d0 S |
347 | |
348 | return ret; | |
349 | } |