[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / wmi.c

/*
 * Copyright (c) 2010 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "htc.h"

static const char *wmi_cmd_to_name(enum wmi_cmd_id wmi_cmd)
{
	switch (wmi_cmd) {
	case WMI_ECHO_CMDID:
		return "WMI_ECHO_CMDID";
	case WMI_ACCESS_MEMORY_CMDID:
		return "WMI_ACCESS_MEMORY_CMDID";
	case WMI_DISABLE_INTR_CMDID:
		return "WMI_DISABLE_INTR_CMDID";
	case WMI_ENABLE_INTR_CMDID:
		return "WMI_ENABLE_INTR_CMDID";
	case WMI_RX_LINK_CMDID:
		return "WMI_RX_LINK_CMDID";
	case WMI_ATH_INIT_CMDID:
		return "WMI_ATH_INIT_CMDID";
	case WMI_ABORT_TXQ_CMDID:
		return "WMI_ABORT_TXQ_CMDID";
	case WMI_STOP_TX_DMA_CMDID:
		return "WMI_STOP_TX_DMA_CMDID";
	case WMI_STOP_DMA_RECV_CMDID:
		return "WMI_STOP_DMA_RECV_CMDID";
	case WMI_ABORT_TX_DMA_CMDID:
		return "WMI_ABORT_TX_DMA_CMDID";
	case WMI_DRAIN_TXQ_CMDID:
		return "WMI_DRAIN_TXQ_CMDID";
	case WMI_DRAIN_TXQ_ALL_CMDID:
		return "WMI_DRAIN_TXQ_ALL_CMDID";
	case WMI_START_RECV_CMDID:
		return "WMI_START_RECV_CMDID";
	case WMI_STOP_RECV_CMDID:
		return "WMI_STOP_RECV_CMDID";
	case WMI_FLUSH_RECV_CMDID:
		return "WMI_FLUSH_RECV_CMDID";
	case WMI_SET_MODE_CMDID:
		return "WMI_SET_MODE_CMDID";
	case WMI_RESET_CMDID:
		return "WMI_RESET_CMDID";
	case WMI_NODE_CREATE_CMDID:
		return "WMI_NODE_CREATE_CMDID";
	case WMI_NODE_REMOVE_CMDID:
		return "WMI_NODE_REMOVE_CMDID";
	case WMI_VAP_REMOVE_CMDID:
		return "WMI_VAP_REMOVE_CMDID";
	case WMI_VAP_CREATE_CMDID:
		return "WMI_VAP_CREATE_CMDID";
	case WMI_BEACON_UPDATE_CMDID:
		return "WMI_BEACON_UPDATE_CMDID";
	case WMI_REG_READ_CMDID:
		return "WMI_REG_READ_CMDID";
	case WMI_REG_WRITE_CMDID:
		return "WMI_REG_WRITE_CMDID";
	case WMI_RC_STATE_CHANGE_CMDID:
		return "WMI_RC_STATE_CHANGE_CMDID";
	case WMI_RC_RATE_UPDATE_CMDID:
		return "WMI_RC_RATE_UPDATE_CMDID";
	case WMI_DEBUG_INFO_CMDID:
		return "WMI_DEBUG_INFO_CMDID";
	case WMI_HOST_ATTACH:
		return "WMI_HOST_ATTACH";
	case WMI_TARGET_IC_UPDATE_CMDID:
		return "WMI_TARGET_IC_UPDATE_CMDID";
	case WMI_TGT_STATS_CMDID:
		return "WMI_TGT_STATS_CMDID";
	case WMI_TX_AGGR_ENABLE_CMDID:
		return "WMI_TX_AGGR_ENABLE_CMDID";
	case WMI_TGT_DETACH_CMDID:
		return "WMI_TGT_DETACH_CMDID";
	case WMI_TGT_TXQ_ENABLE_CMDID:
		return "WMI_TGT_TXQ_ENABLE_CMDID";
	case WMI_AGGR_LIMIT_CMD:
		return "WMI_AGGR_LIMIT_CMD";
	}

	return "Bogus";
}

struct wmi *ath9k_init_wmi(struct ath9k_htc_priv *priv)
{
	struct wmi *wmi;

	wmi = kzalloc(sizeof(struct wmi), GFP_KERNEL);
	if (!wmi)
		return NULL;

	wmi->drv_priv = priv;
	wmi->stopped = false;
	mutex_init(&wmi->op_mutex);
	mutex_init(&wmi->multi_write_mutex);
	init_completion(&wmi->cmd_wait);

	return wmi;
}

void ath9k_deinit_wmi(struct ath9k_htc_priv *priv)
{
	struct wmi *wmi = priv->wmi;

	mutex_lock(&wmi->op_mutex);
	wmi->stopped = true;
	mutex_unlock(&wmi->op_mutex);

	kfree(priv->wmi);
}

void ath9k_wmi_tasklet(unsigned long data)
{
	struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
	struct ath_common *common = ath9k_hw_common(priv->ah);

	ath_print(common, ATH_DBG_WMI, "SWBA Event received\n");

	ath9k_htc_swba(priv, priv->wmi->beacon_pending);

}

static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
{
	skb_pull(skb, sizeof(struct wmi_cmd_hdr));

	if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
		memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);

	complete(&wmi->cmd_wait);
}

static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
			      enum htc_endpoint_id epid)
{
	struct wmi *wmi = (struct wmi *) priv;
	struct wmi_cmd_hdr *hdr;
	u16 cmd_id;
	void *wmi_event;
#ifdef CONFIG_ATH9K_HTC_DEBUGFS
	__be32 txrate;
#endif

	if (unlikely(wmi->stopped))
		goto free_skb;

	hdr = (struct wmi_cmd_hdr *) skb->data;
	cmd_id = be16_to_cpu(hdr->command_id);

	if (cmd_id & 0x1000) {
		wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
		switch (cmd_id) {
		case WMI_SWBA_EVENTID:
			wmi->beacon_pending = *(u8 *)wmi_event;
			tasklet_schedule(&wmi->drv_priv->wmi_tasklet);
			break;
		case WMI_TXRATE_EVENTID:
#ifdef CONFIG_ATH9K_HTC_DEBUGFS
			txrate = ((struct wmi_event_txrate *)wmi_event)->txrate;
			wmi->drv_priv->debug.txrate = be32_to_cpu(txrate);
#endif
			break;
		default:
			break;
		}
		kfree_skb(skb);
		return;
	}

	/* Check if there has been a timeout. */
	spin_lock(&wmi->wmi_lock);
	if (cmd_id != wmi->last_cmd_id) {
		spin_unlock(&wmi->wmi_lock);
		goto free_skb;
	}
	spin_unlock(&wmi->wmi_lock);

	/* WMI command response */
	ath9k_wmi_rsp_callback(wmi, skb);

free_skb:
	kfree_skb(skb);
}

static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
			      enum htc_endpoint_id epid, bool txok)
{
	kfree_skb(skb);
}

int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
		      enum htc_endpoint_id *wmi_ctrl_epid)
{
	struct htc_service_connreq connect;
	int ret;

	wmi->htc = htc;

	memset(&connect, 0, sizeof(connect));

	connect.ep_callbacks.priv = wmi;
	connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
	connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
	connect.service_id = WMI_CONTROL_SVC;

	ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
	if (ret)
		return ret;

	*wmi_ctrl_epid = wmi->ctrl_epid;

	return 0;
}

static int ath9k_wmi_cmd_issue(struct wmi *wmi,
			       struct sk_buff *skb,
			       enum wmi_cmd_id cmd, u16 len)
{
	struct wmi_cmd_hdr *hdr;

	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
	hdr->command_id = cpu_to_be16(cmd);
	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);

	return htc_send(wmi->htc, skb, wmi->ctrl_epid, NULL);
}

int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
		  u8 *cmd_buf, u32 cmd_len,
		  u8 *rsp_buf, u32 rsp_len,
		  u32 timeout)
{
	struct ath_hw *ah = wmi->drv_priv->ah;
	struct ath_common *common = ath9k_hw_common(ah);
	u16 headroom = sizeof(struct htc_frame_hdr) +
		       sizeof(struct wmi_cmd_hdr);
	struct sk_buff *skb;
	u8 *data;
	int time_left, ret = 0;
	unsigned long flags;

	if (wmi->drv_priv->op_flags & OP_UNPLUGGED)
		return 0;

	skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

	skb_reserve(skb, headroom);

	if (cmd_len != 0 && cmd_buf != NULL) {
		data = (u8 *) skb_put(skb, cmd_len);
		memcpy(data, cmd_buf, cmd_len);
	}

	mutex_lock(&wmi->op_mutex);

	/* check if wmi stopped flag is set */
	if (unlikely(wmi->stopped)) {
		ret = -EPROTO;
		goto out;
	}

	/* record the rsp buffer and length */
	wmi->cmd_rsp_buf = rsp_buf;
	wmi->cmd_rsp_len = rsp_len;

	spin_lock_irqsave(&wmi->wmi_lock, flags);
	wmi->last_cmd_id = cmd_id;
	spin_unlock_irqrestore(&wmi->wmi_lock, flags);

	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
	if (ret)
		goto out;

	time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
	if (!time_left) {
		ath_print(common, ATH_DBG_WMI,
			  "Timeout waiting for WMI command: %s\n",
			  wmi_cmd_to_name(cmd_id));
		mutex_unlock(&wmi->op_mutex);
		return -ETIMEDOUT;
	}

	mutex_unlock(&wmi->op_mutex);

	return 0;

out:
	ath_print(common, ATH_DBG_WMI,
		  "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
	mutex_unlock(&wmi->op_mutex);
	kfree_skb(skb);

	return ret;
}
Commit	Line	Data
fb9987d0 S	1	/*
	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
	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_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";
21cb9879 VN	88	case WMI_AGGR_LIMIT_CMD:
21cb9879 VN	89	return "WMI_AGGR_LIMIT_CMD";
fb9987d0 S	90	}
	91
	92	return "Bogus";
	93	}
	94
	95	struct 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);
4a22fe10	106	mutex_init(&wmi->multi_write_mutex);
fb9987d0 S	107	init_completion(&wmi->cmd_wait);
	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
	123	void ath9k_wmi_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);
fb9987d0	127
cc0de653	128	ath_print(common, ATH_DBG_WMI, "SWBA Event received\n");
fb9987d0	129
cc0de653	130	ath9k_htc_swba(priv, priv->wmi->beacon_pending);
fb9987d0	131
fb9987d0 S	132	}
	133
	134	static void ath9k_wmi_rsp_callback(struct wmi wmi, struct sk_buff skb)
	135	{
	136	skb_pull(skb, sizeof(struct wmi_cmd_hdr));
	137
	138	if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
	139	memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
	140
	141	complete(&wmi->cmd_wait);
	142	}
	143
	144	static void ath9k_wmi_ctrl_rx(void priv, struct sk_buff skb,
	145	enum htc_endpoint_id epid)
	146	{
	147	struct wmi wmi = (struct wmi ) priv;
	148	struct wmi_cmd_hdr *hdr;
	149	u16 cmd_id;
cc0de653 RM	150	void *wmi_event;
	151	#ifdef CONFIG_ATH9K_HTC_DEBUGFS
	152	__be32 txrate;
	153	#endif
fb9987d0 S	154
	155	if (unlikely(wmi->stopped))
	156	goto free_skb;
	157
	158	hdr = (struct wmi_cmd_hdr *) skb->data;
	159	cmd_id = be16_to_cpu(hdr->command_id);
	160
	161	if (cmd_id & 0x1000) {
cc0de653 RM	162	wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
	163	switch (cmd_id) {
	164	case WMI_SWBA_EVENTID:
	165	wmi->beacon_pending = (u8 )wmi_event;
	166	tasklet_schedule(&wmi->drv_priv->wmi_tasklet);
	167	break;
	168	case WMI_TXRATE_EVENTID:
	169	#ifdef CONFIG_ATH9K_HTC_DEBUGFS
	170	txrate = ((struct wmi_event_txrate *)wmi_event)->txrate;
	171	wmi->drv_priv->debug.txrate = be32_to_cpu(txrate);
	172	#endif
	173	break;
	174	default:
	175	break;
	176	}
	177	kfree_skb(skb);
fb9987d0 S	178	return;
	179	}
	180
6ce34ec1 S	181	/* Check if there has been a timeout. */
	182	spin_lock(&wmi->wmi_lock);
	183	if (cmd_id != wmi->last_cmd_id) {
	184	spin_unlock(&wmi->wmi_lock);
	185	goto free_skb;
	186	}
	187	spin_unlock(&wmi->wmi_lock);
	188
fb9987d0 S	189	/* WMI command response */
	190	ath9k_wmi_rsp_callback(wmi, skb);
	191
	192	free_skb:
e6c6d33c	193	kfree_skb(skb);
fb9987d0 S	194	}
	195
	196	static void ath9k_wmi_ctrl_tx(void priv, struct sk_buff skb,
	197	enum htc_endpoint_id epid, bool txok)
	198	{
0fa35a58	199	kfree_skb(skb);
fb9987d0 S	200	}
	201
	202	int ath9k_wmi_connect(struct htc_target htc, struct wmi wmi,
	203	enum htc_endpoint_id *wmi_ctrl_epid)
	204	{
	205	struct htc_service_connreq connect;
	206	int ret;
	207
	208	wmi->htc = htc;
	209
	210	memset(&connect, 0, sizeof(connect));
	211
	212	connect.ep_callbacks.priv = wmi;
	213	connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
	214	connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
	215	connect.service_id = WMI_CONTROL_SVC;
	216
	217	ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
	218	if (ret)
	219	return ret;
	220
	221	*wmi_ctrl_epid = wmi->ctrl_epid;
	222
	223	return 0;
	224	}
	225
	226	static int ath9k_wmi_cmd_issue(struct wmi *wmi,
	227	struct sk_buff *skb,
	228	enum wmi_cmd_id cmd, u16 len)
	229	{
	230	struct wmi_cmd_hdr *hdr;
	231
	232	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
	233	hdr->command_id = cpu_to_be16(cmd);
	234	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
	235
	236	return htc_send(wmi->htc, skb, wmi->ctrl_epid, NULL);
	237	}
	238
	239	int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
	240	u8 *cmd_buf, u32 cmd_len,
	241	u8 *rsp_buf, u32 rsp_len,
	242	u32 timeout)
	243	{
	244	struct ath_hw *ah = wmi->drv_priv->ah;
	245	struct ath_common *common = ath9k_hw_common(ah);
	246	u16 headroom = sizeof(struct htc_frame_hdr) +
	247	sizeof(struct wmi_cmd_hdr);
	248	struct sk_buff *skb;
	249	u8 *data;
	250	int time_left, ret = 0;
6ce34ec1	251	unsigned long flags;
fb9987d0	252
a3be14b7 S	253	if (wmi->drv_priv->op_flags & OP_UNPLUGGED)
	254	return 0;
	255
0fa35a58	256	skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
fb9987d0 S	257	if (!skb)
	258	return -ENOMEM;
	259
	260	skb_reserve(skb, headroom);
	261
	262	if (cmd_len != 0 && cmd_buf != NULL) {
	263	data = (u8 *) skb_put(skb, cmd_len);
	264	memcpy(data, cmd_buf, cmd_len);
	265	}
	266
	267	mutex_lock(&wmi->op_mutex);
	268
	269	/* check if wmi stopped flag is set */
	270	if (unlikely(wmi->stopped)) {
	271	ret = -EPROTO;
	272	goto out;
	273	}
	274
	275	/* record the rsp buffer and length */
	276	wmi->cmd_rsp_buf = rsp_buf;
	277	wmi->cmd_rsp_len = rsp_len;
	278
6ce34ec1 S	279	spin_lock_irqsave(&wmi->wmi_lock, flags);
	280	wmi->last_cmd_id = cmd_id;
	281	spin_unlock_irqrestore(&wmi->wmi_lock, flags);
	282
0d36d71d S	283	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
	284	if (ret)
	285	goto out;
	286
fb9987d0 S	287	time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
	288	if (!time_left) {
	289	ath_print(common, ATH_DBG_WMI,
	290	"Timeout waiting for WMI command: %s\n",
	291	wmi_cmd_to_name(cmd_id));
	292	mutex_unlock(&wmi->op_mutex);
	293	return -ETIMEDOUT;
	294	}
	295
	296	mutex_unlock(&wmi->op_mutex);
	297
	298	return 0;
	299
	300	out:
	301	ath_print(common, ATH_DBG_WMI,
	302	"WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
	303	mutex_unlock(&wmi->op_mutex);
0fa35a58	304	kfree_skb(skb);
fb9987d0 S	305
	306	return ret;
	307	}