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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_DISABLE_INTR_CMDID:
27 return "WMI_DISABLE_INTR_CMDID";
28 case WMI_ENABLE_INTR_CMDID:
29 return "WMI_ENABLE_INTR_CMDID";
30 case WMI_RX_LINK_CMDID:
31 return "WMI_RX_LINK_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_STOP_DMA_RECV_CMDID:
39 return "WMI_STOP_DMA_RECV_CMDID";
40 case WMI_ABORT_TX_DMA_CMDID:
41 return "WMI_ABORT_TX_DMA_CMDID";
42 case WMI_DRAIN_TXQ_CMDID:
43 return "WMI_DRAIN_TXQ_CMDID";
44 case WMI_DRAIN_TXQ_ALL_CMDID:
45 return "WMI_DRAIN_TXQ_ALL_CMDID";
46 case WMI_START_RECV_CMDID:
47 return "WMI_START_RECV_CMDID";
48 case WMI_STOP_RECV_CMDID:
49 return "WMI_STOP_RECV_CMDID";
50 case WMI_FLUSH_RECV_CMDID:
51 return "WMI_FLUSH_RECV_CMDID";
52 case WMI_SET_MODE_CMDID:
53 return "WMI_SET_MODE_CMDID";
54 case WMI_RESET_CMDID:
55 return "WMI_RESET_CMDID";
56 case WMI_NODE_CREATE_CMDID:
57 return "WMI_NODE_CREATE_CMDID";
58 case WMI_NODE_REMOVE_CMDID:
59 return "WMI_NODE_REMOVE_CMDID";
60 case WMI_VAP_REMOVE_CMDID:
61 return "WMI_VAP_REMOVE_CMDID";
62 case WMI_VAP_CREATE_CMDID:
63 return "WMI_VAP_CREATE_CMDID";
64 case WMI_BEACON_UPDATE_CMDID:
65 return "WMI_BEACON_UPDATE_CMDID";
66 case WMI_REG_READ_CMDID:
67 return "WMI_REG_READ_CMDID";
68 case WMI_REG_WRITE_CMDID:
69 return "WMI_REG_WRITE_CMDID";
70 case WMI_RC_STATE_CHANGE_CMDID:
71 return "WMI_RC_STATE_CHANGE_CMDID";
72 case WMI_RC_RATE_UPDATE_CMDID:
73 return "WMI_RC_RATE_UPDATE_CMDID";
74 case WMI_DEBUG_INFO_CMDID:
75 return "WMI_DEBUG_INFO_CMDID";
76 case WMI_HOST_ATTACH:
77 return "WMI_HOST_ATTACH";
78 case WMI_TARGET_IC_UPDATE_CMDID:
79 return "WMI_TARGET_IC_UPDATE_CMDID";
80 case WMI_TGT_STATS_CMDID:
81 return "WMI_TGT_STATS_CMDID";
82 case WMI_TX_AGGR_ENABLE_CMDID:
83 return "WMI_TX_AGGR_ENABLE_CMDID";
84 case WMI_TGT_DETACH_CMDID:
85 return "WMI_TGT_DETACH_CMDID";
86 case WMI_TGT_TXQ_ENABLE_CMDID:
87 return "WMI_TGT_TXQ_ENABLE_CMDID";
88 case WMI_AGGR_LIMIT_CMD:
89 return "WMI_AGGR_LIMIT_CMD";
90 }
91
92 return "Bogus";
93}
94
95struct wmi *ath9k_init_wmi(struct ath9k_htc_priv *priv)
96{
97 struct wmi *wmi;
98
99 wmi = kzalloc(sizeof(struct wmi), GFP_KERNEL);
100 if (!wmi)
101 return NULL;
102
103 wmi->drv_priv = priv;
104 wmi->stopped = false;
105 mutex_init(&wmi->op_mutex);
106 mutex_init(&wmi->multi_write_mutex);
107 init_completion(&wmi->cmd_wait);
108
109 return wmi;
110}
111
112void 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
123void ath9k_swba_tasklet(unsigned long data)
124{
125 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
126 struct ath_common *common = ath9k_hw_common(priv->ah);
127
128 ath_dbg(common, ATH_DBG_WMI, "SWBA Event received\n");
129
130 ath9k_htc_swba(priv, priv->wmi->beacon_pending);
131
132}
133
134void ath9k_fatal_work(struct work_struct *work)
135{
136 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
137 fatal_work);
138 struct ath_common *common = ath9k_hw_common(priv->ah);
139
140 ath_dbg(common, ATH_DBG_FATAL, "FATAL Event received, resetting device\n");
141 ath9k_htc_reset(priv);
142}
143
144static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
145{
146 skb_pull(skb, sizeof(struct wmi_cmd_hdr));
147
148 if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
149 memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
150
151 complete(&wmi->cmd_wait);
152}
153
154static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
155 enum htc_endpoint_id epid)
156{
157 struct wmi *wmi = (struct wmi *) priv;
158 struct wmi_cmd_hdr *hdr;
159 u16 cmd_id;
160 void *wmi_event;
161#ifdef CONFIG_ATH9K_HTC_DEBUGFS
162 __be32 txrate;
163#endif
164
165 if (unlikely(wmi->stopped))
166 goto free_skb;
167
168 hdr = (struct wmi_cmd_hdr *) skb->data;
169 cmd_id = be16_to_cpu(hdr->command_id);
170
171 if (cmd_id & 0x1000) {
172 wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
173 switch (cmd_id) {
174 case WMI_SWBA_EVENTID:
175 wmi->beacon_pending = *(u8 *)wmi_event;
176 tasklet_schedule(&wmi->drv_priv->swba_tasklet);
177 break;
178 case WMI_FATAL_EVENTID:
179 ieee80211_queue_work(wmi->drv_priv->hw,
180 &wmi->drv_priv->fatal_work);
181 break;
182 case WMI_TXRATE_EVENTID:
183#ifdef CONFIG_ATH9K_HTC_DEBUGFS
184 txrate = ((struct wmi_event_txrate *)wmi_event)->txrate;
185 wmi->drv_priv->debug.txrate = be32_to_cpu(txrate);
186#endif
187 break;
188 default:
189 break;
190 }
191 kfree_skb(skb);
192 return;
193 }
194
195
196 spin_lock(&wmi->wmi_lock);
197 if (cmd_id != wmi->last_cmd_id) {
198 spin_unlock(&wmi->wmi_lock);
199 goto free_skb;
200 }
201 spin_unlock(&wmi->wmi_lock);
202
203
204 ath9k_wmi_rsp_callback(wmi, skb);
205
206free_skb:
207 kfree_skb(skb);
208}
209
210static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
211 enum htc_endpoint_id epid, bool txok)
212{
213 kfree_skb(skb);
214}
215
216int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
217 enum htc_endpoint_id *wmi_ctrl_epid)
218{
219 struct htc_service_connreq connect;
220 int ret;
221
222 wmi->htc = htc;
223
224 memset(&connect, 0, sizeof(connect));
225
226 connect.ep_callbacks.priv = wmi;
227 connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
228 connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
229 connect.service_id = WMI_CONTROL_SVC;
230
231 ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
232 if (ret)
233 return ret;
234
235 *wmi_ctrl_epid = wmi->ctrl_epid;
236
237 return 0;
238}
239
240static int ath9k_wmi_cmd_issue(struct wmi *wmi,
241 struct sk_buff *skb,
242 enum wmi_cmd_id cmd, u16 len)
243{
244 struct wmi_cmd_hdr *hdr;
245
246 hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
247 hdr->command_id = cpu_to_be16(cmd);
248 hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
249
250 return htc_send(wmi->htc, skb, wmi->ctrl_epid, NULL);
251}
252
253int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
254 u8 *cmd_buf, u32 cmd_len,
255 u8 *rsp_buf, u32 rsp_len,
256 u32 timeout)
257{
258 struct ath_hw *ah = wmi->drv_priv->ah;
259 struct ath_common *common = ath9k_hw_common(ah);
260 u16 headroom = sizeof(struct htc_frame_hdr) +
261 sizeof(struct wmi_cmd_hdr);
262 struct sk_buff *skb;
263 u8 *data;
264 int time_left, ret = 0;
265 unsigned long flags;
266
267 if (ah->ah_flags & AH_UNPLUGGED)
268 return 0;
269
270 skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
271 if (!skb)
272 return -ENOMEM;
273
274 skb_reserve(skb, headroom);
275
276 if (cmd_len != 0 && cmd_buf != NULL) {
277 data = (u8 *) skb_put(skb, cmd_len);
278 memcpy(data, cmd_buf, cmd_len);
279 }
280
281 mutex_lock(&wmi->op_mutex);
282
283
284 if (unlikely(wmi->stopped)) {
285 ret = -EPROTO;
286 goto out;
287 }
288
289
290 wmi->cmd_rsp_buf = rsp_buf;
291 wmi->cmd_rsp_len = rsp_len;
292
293 spin_lock_irqsave(&wmi->wmi_lock, flags);
294 wmi->last_cmd_id = cmd_id;
295 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
296
297 ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
298 if (ret)
299 goto out;
300
301 time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
302 if (!time_left) {
303 ath_dbg(common, ATH_DBG_WMI,
304 "Timeout waiting for WMI command: %s\n",
305 wmi_cmd_to_name(cmd_id));
306 mutex_unlock(&wmi->op_mutex);
307 return -ETIMEDOUT;
308 }
309
310 mutex_unlock(&wmi->op_mutex);
311
312 return 0;
313
314out:
315 ath_dbg(common, ATH_DBG_WMI,
316 "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
317 mutex_unlock(&wmi->op_mutex);
318 kfree_skb(skb);
319
320 return ret;
321}
322
