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17#include "htc.h"
18
19static 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
91struct 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
115void 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
124void ath9k_destroy_wmi(struct ath9k_htc_priv *priv)
125{
126 kfree(priv->wmi);
127}
128
129void 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
139void 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
174 if (!data_race(priv->tx.initialized))
175 break;
176
177 spin_lock_bh(&priv->tx.tx_lock);
178 if (priv->tx.flags & ATH9K_HTC_OP_TX_DRAIN) {
179 spin_unlock_bh(&priv->tx.tx_lock);
180 break;
181 }
182 spin_unlock_bh(&priv->tx.tx_lock);
183
184 ath9k_htc_txstatus(priv, wmi_event);
185 break;
186 default:
187 break;
188 }
189
190 kfree_skb(skb);
191 } while (1);
192}
193
194void ath9k_fatal_work(struct work_struct *work)
195{
196 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
197 fatal_work);
198 struct ath_common *common = ath9k_hw_common(priv->ah);
199
200 ath_dbg(common, FATAL, "FATAL Event received, resetting device\n");
201 ath9k_htc_reset(priv);
202}
203
204static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
205{
206 skb_pull(skb, sizeof(struct wmi_cmd_hdr));
207
208 if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
209 memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
210
211 complete(&wmi->cmd_wait);
212}
213
214static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
215 enum htc_endpoint_id epid)
216{
217 struct wmi *wmi = priv;
218 struct wmi_cmd_hdr *hdr;
219 unsigned long flags;
220 u16 cmd_id;
221
222 if (unlikely(wmi->stopped))
223 goto free_skb;
224
225 hdr = (struct wmi_cmd_hdr *) skb->data;
226 cmd_id = be16_to_cpu(hdr->command_id);
227
228 if (cmd_id & 0x1000) {
229 spin_lock_irqsave(&wmi->wmi_lock, flags);
230 __skb_queue_tail(&wmi->wmi_event_queue, skb);
231 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
232 tasklet_schedule(&wmi->wmi_event_tasklet);
233 return;
234 }
235
236
237 spin_lock_irqsave(&wmi->wmi_lock, flags);
238 if (be16_to_cpu(hdr->seq_no) != wmi->last_seq_id) {
239 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
240 goto free_skb;
241 }
242 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
243
244
245 ath9k_wmi_rsp_callback(wmi, skb);
246
247free_skb:
248 kfree_skb(skb);
249}
250
251static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
252 enum htc_endpoint_id epid, bool txok)
253{
254 kfree_skb(skb);
255}
256
257int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
258 enum htc_endpoint_id *wmi_ctrl_epid)
259{
260 struct htc_service_connreq connect;
261 int ret;
262
263 wmi->htc = htc;
264
265 memset(&connect, 0, sizeof(connect));
266
267 connect.ep_callbacks.priv = wmi;
268 connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
269 connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
270 connect.service_id = WMI_CONTROL_SVC;
271
272 ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
273 if (ret)
274 return ret;
275
276 *wmi_ctrl_epid = wmi->ctrl_epid;
277
278 return 0;
279}
280
281static int ath9k_wmi_cmd_issue(struct wmi *wmi,
282 struct sk_buff *skb,
283 enum wmi_cmd_id cmd, u16 len)
284{
285 struct wmi_cmd_hdr *hdr;
286 unsigned long flags;
287
288 hdr = skb_push(skb, sizeof(struct wmi_cmd_hdr));
289 hdr->command_id = cpu_to_be16(cmd);
290 hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
291
292 spin_lock_irqsave(&wmi->wmi_lock, flags);
293 wmi->last_seq_id = wmi->tx_seq_id;
294 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
295
296 return htc_send_epid(wmi->htc, skb, wmi->ctrl_epid);
297}
298
299int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
300 u8 *cmd_buf, u32 cmd_len,
301 u8 *rsp_buf, u32 rsp_len,
302 u32 timeout)
303{
304 struct ath_hw *ah = wmi->drv_priv->ah;
305 struct ath_common *common = ath9k_hw_common(ah);
306 u16 headroom = sizeof(struct htc_frame_hdr) +
307 sizeof(struct wmi_cmd_hdr);
308 struct sk_buff *skb;
309 unsigned long time_left;
310 int ret = 0;
311
312 if (ah->ah_flags & AH_UNPLUGGED)
313 return 0;
314
315 skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
316 if (!skb)
317 return -ENOMEM;
318
319 skb_reserve(skb, headroom);
320
321 if (cmd_len != 0 && cmd_buf != NULL) {
322 skb_put_data(skb, cmd_buf, cmd_len);
323 }
324
325 mutex_lock(&wmi->op_mutex);
326
327
328 if (unlikely(wmi->stopped)) {
329 ret = -EPROTO;
330 goto out;
331 }
332
333
334 wmi->cmd_rsp_buf = rsp_buf;
335 wmi->cmd_rsp_len = rsp_len;
336
337 ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
338 if (ret)
339 goto out;
340
341 time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
342 if (!time_left) {
343 ath_dbg(common, WMI, "Timeout waiting for WMI command: %s\n",
344 wmi_cmd_to_name(cmd_id));
345 mutex_unlock(&wmi->op_mutex);
346 return -ETIMEDOUT;
347 }
348
349 mutex_unlock(&wmi->op_mutex);
350
351 return 0;
352
353out:
354 ath_dbg(common, WMI, "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
355 mutex_unlock(&wmi->op_mutex);
356 kfree_skb(skb);
357
358 return ret;
359}
360
