This source file includes following definitions.
- wmi_cmd_to_name
- ath9k_init_wmi
- ath9k_stop_wmi
- ath9k_destoy_wmi
- ath9k_wmi_event_drain
- ath9k_wmi_event_tasklet
- ath9k_fatal_work
- ath9k_wmi_rsp_callback
- ath9k_wmi_ctrl_rx
- ath9k_wmi_ctrl_tx
- ath9k_wmi_connect
- ath9k_wmi_cmd_issue
- ath9k_wmi_cmd
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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";
26 case WMI_GET_FW_VERSION:
27 return "WMI_GET_FW_VERSION";
28 case WMI_DISABLE_INTR_CMDID:
29 return "WMI_DISABLE_INTR_CMDID";
30 case WMI_ENABLE_INTR_CMDID:
31 return "WMI_ENABLE_INTR_CMDID";
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";
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";
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";
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_REG_RMW_CMDID:
65 return "WMI_REG_RMW_CMDID";
66 case WMI_RC_STATE_CHANGE_CMDID:
67 return "WMI_RC_STATE_CHANGE_CMDID";
68 case WMI_RC_RATE_UPDATE_CMDID:
69 return "WMI_RC_RATE_UPDATE_CMDID";
70 case WMI_TARGET_IC_UPDATE_CMDID:
71 return "WMI_TARGET_IC_UPDATE_CMDID";
72 case WMI_TX_AGGR_ENABLE_CMDID:
73 return "WMI_TX_AGGR_ENABLE_CMDID";
74 case WMI_TGT_DETACH_CMDID:
75 return "WMI_TGT_DETACH_CMDID";
76 case WMI_NODE_UPDATE_CMDID:
77 return "WMI_NODE_UPDATE_CMDID";
78 case WMI_INT_STATS_CMDID:
79 return "WMI_INT_STATS_CMDID";
80 case WMI_TX_STATS_CMDID:
81 return "WMI_TX_STATS_CMDID";
82 case WMI_RX_STATS_CMDID:
83 return "WMI_RX_STATS_CMDID";
84 case WMI_BITRATE_MASK_CMDID:
85 return "WMI_BITRATE_MASK_CMDID";
86 }
87
88 return "Bogus";
89 }
90
91 struct wmi *ath9k_init_wmi(struct ath9k_htc_priv *priv)
92 {
93 struct wmi *wmi;
94
95 wmi = kzalloc(sizeof(struct wmi), GFP_KERNEL);
96 if (!wmi)
97 return NULL;
98
99 wmi->drv_priv = priv;
100 wmi->stopped = false;
101 skb_queue_head_init(&wmi->wmi_event_queue);
102 spin_lock_init(&wmi->wmi_lock);
103 spin_lock_init(&wmi->event_lock);
104 mutex_init(&wmi->op_mutex);
105 mutex_init(&wmi->multi_write_mutex);
106 mutex_init(&wmi->multi_rmw_mutex);
107 init_completion(&wmi->cmd_wait);
108 INIT_LIST_HEAD(&wmi->pending_tx_events);
109 tasklet_init(&wmi->wmi_event_tasklet, ath9k_wmi_event_tasklet,
110 (unsigned long)wmi);
111
112 return wmi;
113 }
114
115 void ath9k_stop_wmi(struct ath9k_htc_priv *priv)
116 {
117 struct wmi *wmi = priv->wmi;
118
119 mutex_lock(&wmi->op_mutex);
120 wmi->stopped = true;
121 mutex_unlock(&wmi->op_mutex);
122 }
123
124 void ath9k_destoy_wmi(struct ath9k_htc_priv *priv)
125 {
126 kfree(priv->wmi);
127 }
128
129 void ath9k_wmi_event_drain(struct ath9k_htc_priv *priv)
130 {
131 unsigned long flags;
132
133 tasklet_kill(&priv->wmi->wmi_event_tasklet);
134 spin_lock_irqsave(&priv->wmi->wmi_lock, flags);
135 __skb_queue_purge(&priv->wmi->wmi_event_queue);
136 spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags);
137 }
138
139 void ath9k_wmi_event_tasklet(unsigned long data)
140 {
141 struct wmi *wmi = (struct wmi *)data;
142 struct ath9k_htc_priv *priv = wmi->drv_priv;
143 struct wmi_cmd_hdr *hdr;
144 void *wmi_event;
145 struct wmi_event_swba *swba;
146 struct sk_buff *skb = NULL;
147 unsigned long flags;
148 u16 cmd_id;
149
150 do {
151 spin_lock_irqsave(&wmi->wmi_lock, flags);
152 skb = __skb_dequeue(&wmi->wmi_event_queue);
153 if (!skb) {
154 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
155 return;
156 }
157 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
158
159 hdr = (struct wmi_cmd_hdr *) skb->data;
160 cmd_id = be16_to_cpu(hdr->command_id);
161 wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
162
163 switch (cmd_id) {
164 case WMI_SWBA_EVENTID:
165 swba = wmi_event;
166 ath9k_htc_swba(priv, swba);
167 break;
168 case WMI_FATAL_EVENTID:
169 ieee80211_queue_work(wmi->drv_priv->hw,
170 &wmi->drv_priv->fatal_work);
171 break;
172 case WMI_TXSTATUS_EVENTID:
173 spin_lock_bh(&priv->tx.tx_lock);
174 if (priv->tx.flags & ATH9K_HTC_OP_TX_DRAIN) {
175 spin_unlock_bh(&priv->tx.tx_lock);
176 break;
177 }
178 spin_unlock_bh(&priv->tx.tx_lock);
179
180 ath9k_htc_txstatus(priv, wmi_event);
181 break;
182 default:
183 break;
184 }
185
186 kfree_skb(skb);
187 } while (1);
188 }
189
190 void ath9k_fatal_work(struct work_struct *work)
191 {
192 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
193 fatal_work);
194 struct ath_common *common = ath9k_hw_common(priv->ah);
195
196 ath_dbg(common, FATAL, "FATAL Event received, resetting device\n");
197 ath9k_htc_reset(priv);
198 }
199
200 static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
201 {
202 skb_pull(skb, sizeof(struct wmi_cmd_hdr));
203
204 if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
205 memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
206
207 complete(&wmi->cmd_wait);
208 }
209
210 static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
211 enum htc_endpoint_id epid)
212 {
213 struct wmi *wmi = priv;
214 struct wmi_cmd_hdr *hdr;
215 unsigned long flags;
216 u16 cmd_id;
217
218 if (unlikely(wmi->stopped))
219 goto free_skb;
220
221 hdr = (struct wmi_cmd_hdr *) skb->data;
222 cmd_id = be16_to_cpu(hdr->command_id);
223
224 if (cmd_id & 0x1000) {
225 spin_lock_irqsave(&wmi->wmi_lock, flags);
226 __skb_queue_tail(&wmi->wmi_event_queue, skb);
227 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
228 tasklet_schedule(&wmi->wmi_event_tasklet);
229 return;
230 }
231
232
233 spin_lock_irqsave(&wmi->wmi_lock, flags);
234 if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) {
235 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
236 goto free_skb;
237 }
238 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
239
240
241 ath9k_wmi_rsp_callback(wmi, skb);
242
243 free_skb:
244 kfree_skb(skb);
245 }
246
247 static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
248 enum htc_endpoint_id epid, bool txok)
249 {
250 kfree_skb(skb);
251 }
252
253 int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
254 enum htc_endpoint_id *wmi_ctrl_epid)
255 {
256 struct htc_service_connreq connect;
257 int ret;
258
259 wmi->htc = htc;
260
261 memset(&connect, 0, sizeof(connect));
262
263 connect.ep_callbacks.priv = wmi;
264 connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
265 connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
266 connect.service_id = WMI_CONTROL_SVC;
267
268 ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
269 if (ret)
270 return ret;
271
272 *wmi_ctrl_epid = wmi->ctrl_epid;
273
274 return 0;
275 }
276
277 static int ath9k_wmi_cmd_issue(struct wmi *wmi,
278 struct sk_buff *skb,
279 enum wmi_cmd_id cmd, u16 len)
280 {
281 struct wmi_cmd_hdr *hdr;
282 unsigned long flags;
283
284 hdr = skb_push(skb, sizeof(struct wmi_cmd_hdr));
285 hdr->command_id = cpu_to_be16(cmd);
286 hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
287
288 spin_lock_irqsave(&wmi->wmi_lock, flags);
289 wmi->last_seq_id = wmi->tx_seq_id;
290 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
291
292 return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid);
293 }
294
295 int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
296 u8 *cmd_buf, u32 cmd_len,
297 u8 *rsp_buf, u32 rsp_len,
298 u32 timeout)
299 {
300 struct ath_hw *ah = wmi->drv_priv->ah;
301 struct ath_common *common = ath9k_hw_common(ah);
302 u16 headroom = sizeof(struct htc_frame_hdr) +
303 sizeof(struct wmi_cmd_hdr);
304 struct sk_buff *skb;
305 unsigned long time_left;
306 int ret = 0;
307
308 if (ah->ah_flags & AH_UNPLUGGED)
309 return 0;
310
311 skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
312 if (!skb)
313 return -ENOMEM;
314
315 skb_reserve(skb, headroom);
316
317 if (cmd_len != 0 && cmd_buf != NULL) {
318 skb_put_data(skb, cmd_buf, cmd_len);
319 }
320
321 mutex_lock(&wmi->op_mutex);
322
323
324 if (unlikely(wmi->stopped)) {
325 ret = -EPROTO;
326 goto out;
327 }
328
329
330 wmi->cmd_rsp_buf = rsp_buf;
331 wmi->cmd_rsp_len = rsp_len;
332
333 ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
334 if (ret)
335 goto out;
336
337 time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
338 if (!time_left) {
339 ath_dbg(common, WMI, "Timeout waiting for WMI command: %s\n",
340 wmi_cmd_to_name(cmd_id));
341 mutex_unlock(&wmi->op_mutex);
342 return -ETIMEDOUT;
343 }
344
345 mutex_unlock(&wmi->op_mutex);
346
347 return 0;
348
349 out:
350 ath_dbg(common, WMI, "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
351 mutex_unlock(&wmi->op_mutex);
352 kfree_skb(skb);
353
354 return ret;
355 }