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Sujithfb9987d2010-03-17 14:25:25 +05301/*
2 * Copyright (c) 2010 Atheros Communications Inc.
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
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";
Vivek Natarajan21cb9872010-08-18 19:57:49 +053088 case WMI_AGGR_LIMIT_CMD:
89 return "WMI_AGGR_LIMIT_CMD";
Sujithfb9987d2010-03-17 14:25:25 +053090 }
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);
Sujith4a22fe12010-04-16 11:53:53 +0530106 mutex_init(&wmi->multi_write_mutex);
Sujithfb9987d2010-03-17 14:25:25 +0530107 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
Sujith Manoharan73908672010-12-28 14:28:27 +0530123void ath9k_swba_tasklet(unsigned long data)
Sujithfb9987d2010-03-17 14:25:25 +0530124{
125 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
Sujithfb9987d2010-03-17 14:25:25 +0530126
Rajkumar Manoharancc0de652010-09-14 13:07:28 +0530127 ath9k_htc_swba(priv, priv->wmi->beacon_pending);
Sujithfb9987d2010-03-17 14:25:25 +0530128}
129
Sujith Manoharan73908672010-12-28 14:28:27 +0530130void ath9k_fatal_work(struct work_struct *work)
131{
132 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
133 fatal_work);
134 struct ath_common *common = ath9k_hw_common(priv->ah);
135
136 ath_dbg(common, ATH_DBG_FATAL, "FATAL Event received, resetting device\n");
137 ath9k_htc_reset(priv);
138}
139
Sujithfb9987d2010-03-17 14:25:25 +0530140static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
141{
142 skb_pull(skb, sizeof(struct wmi_cmd_hdr));
143
144 if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
145 memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
146
147 complete(&wmi->cmd_wait);
148}
149
150static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
151 enum htc_endpoint_id epid)
152{
153 struct wmi *wmi = (struct wmi *) priv;
154 struct wmi_cmd_hdr *hdr;
155 u16 cmd_id;
Rajkumar Manoharancc0de652010-09-14 13:07:28 +0530156 void *wmi_event;
157#ifdef CONFIG_ATH9K_HTC_DEBUGFS
158 __be32 txrate;
159#endif
Sujithfb9987d2010-03-17 14:25:25 +0530160
161 if (unlikely(wmi->stopped))
162 goto free_skb;
163
164 hdr = (struct wmi_cmd_hdr *) skb->data;
165 cmd_id = be16_to_cpu(hdr->command_id);
166
167 if (cmd_id & 0x1000) {
Rajkumar Manoharancc0de652010-09-14 13:07:28 +0530168 wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
169 switch (cmd_id) {
170 case WMI_SWBA_EVENTID:
171 wmi->beacon_pending = *(u8 *)wmi_event;
Sujith Manoharan73908672010-12-28 14:28:27 +0530172 tasklet_schedule(&wmi->drv_priv->swba_tasklet);
173 break;
174 case WMI_FATAL_EVENTID:
175 ieee80211_queue_work(wmi->drv_priv->hw,
176 &wmi->drv_priv->fatal_work);
Rajkumar Manoharancc0de652010-09-14 13:07:28 +0530177 break;
178 case WMI_TXRATE_EVENTID:
179#ifdef CONFIG_ATH9K_HTC_DEBUGFS
180 txrate = ((struct wmi_event_txrate *)wmi_event)->txrate;
181 wmi->drv_priv->debug.txrate = be32_to_cpu(txrate);
182#endif
183 break;
184 default:
185 break;
186 }
187 kfree_skb(skb);
Sujithfb9987d2010-03-17 14:25:25 +0530188 return;
189 }
190
Sujith6ce34ec2010-04-16 11:54:01 +0530191 /* Check if there has been a timeout. */
192 spin_lock(&wmi->wmi_lock);
193 if (cmd_id != wmi->last_cmd_id) {
194 spin_unlock(&wmi->wmi_lock);
195 goto free_skb;
196 }
197 spin_unlock(&wmi->wmi_lock);
198
Sujithfb9987d2010-03-17 14:25:25 +0530199 /* WMI command response */
200 ath9k_wmi_rsp_callback(wmi, skb);
201
202free_skb:
Ming Leie6c6d332010-04-13 00:29:05 +0800203 kfree_skb(skb);
Sujithfb9987d2010-03-17 14:25:25 +0530204}
205
206static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
207 enum htc_endpoint_id epid, bool txok)
208{
Ming Lei0fa35a52010-04-13 00:29:15 +0800209 kfree_skb(skb);
Sujithfb9987d2010-03-17 14:25:25 +0530210}
211
212int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
213 enum htc_endpoint_id *wmi_ctrl_epid)
214{
215 struct htc_service_connreq connect;
216 int ret;
217
218 wmi->htc = htc;
219
220 memset(&connect, 0, sizeof(connect));
221
222 connect.ep_callbacks.priv = wmi;
223 connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
224 connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
225 connect.service_id = WMI_CONTROL_SVC;
226
227 ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
228 if (ret)
229 return ret;
230
231 *wmi_ctrl_epid = wmi->ctrl_epid;
232
233 return 0;
234}
235
236static int ath9k_wmi_cmd_issue(struct wmi *wmi,
237 struct sk_buff *skb,
238 enum wmi_cmd_id cmd, u16 len)
239{
240 struct wmi_cmd_hdr *hdr;
241
242 hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
243 hdr->command_id = cpu_to_be16(cmd);
244 hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
245
246 return htc_send(wmi->htc, skb, wmi->ctrl_epid, NULL);
247}
248
249int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
250 u8 *cmd_buf, u32 cmd_len,
251 u8 *rsp_buf, u32 rsp_len,
252 u32 timeout)
253{
254 struct ath_hw *ah = wmi->drv_priv->ah;
255 struct ath_common *common = ath9k_hw_common(ah);
256 u16 headroom = sizeof(struct htc_frame_hdr) +
257 sizeof(struct wmi_cmd_hdr);
258 struct sk_buff *skb;
259 u8 *data;
260 int time_left, ret = 0;
Sujith6ce34ec2010-04-16 11:54:01 +0530261 unsigned long flags;
Sujithfb9987d2010-03-17 14:25:25 +0530262
Sujith Manoharan97dcec52010-12-20 08:02:42 +0530263 if (ah->ah_flags & AH_UNPLUGGED)
Sujitha3be14b2010-04-23 10:28:10 +0530264 return 0;
265
Ming Lei0fa35a52010-04-13 00:29:15 +0800266 skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
Sujithfb9987d2010-03-17 14:25:25 +0530267 if (!skb)
268 return -ENOMEM;
269
270 skb_reserve(skb, headroom);
271
272 if (cmd_len != 0 && cmd_buf != NULL) {
273 data = (u8 *) skb_put(skb, cmd_len);
274 memcpy(data, cmd_buf, cmd_len);
275 }
276
277 mutex_lock(&wmi->op_mutex);
278
279 /* check if wmi stopped flag is set */
280 if (unlikely(wmi->stopped)) {
281 ret = -EPROTO;
282 goto out;
283 }
284
285 /* record the rsp buffer and length */
286 wmi->cmd_rsp_buf = rsp_buf;
287 wmi->cmd_rsp_len = rsp_len;
288
Sujith6ce34ec2010-04-16 11:54:01 +0530289 spin_lock_irqsave(&wmi->wmi_lock, flags);
290 wmi->last_cmd_id = cmd_id;
291 spin_unlock_irqrestore(&wmi->wmi_lock, flags);
292
Sujith0d36d712010-04-23 10:28:19 +0530293 ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
294 if (ret)
295 goto out;
296
Sujithfb9987d2010-03-17 14:25:25 +0530297 time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
298 if (!time_left) {
Joe Perches226afe62010-12-02 19:12:37 -0800299 ath_dbg(common, ATH_DBG_WMI,
300 "Timeout waiting for WMI command: %s\n",
301 wmi_cmd_to_name(cmd_id));
Sujithfb9987d2010-03-17 14:25:25 +0530302 mutex_unlock(&wmi->op_mutex);
303 return -ETIMEDOUT;
304 }
305
306 mutex_unlock(&wmi->op_mutex);
307
308 return 0;
309
310out:
Joe Perches226afe62010-12-02 19:12:37 -0800311 ath_dbg(common, ATH_DBG_WMI,
312 "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
Sujithfb9987d2010-03-17 14:25:25 +0530313 mutex_unlock(&wmi->op_mutex);
Ming Lei0fa35a52010-04-13 00:29:15 +0800314 kfree_skb(skb);
Sujithfb9987d2010-03-17 14:25:25 +0530315
316 return ret;
317}