summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/rsi/rsi_91x_coex.c
blob: c8ba148f8c6cf03054385c2ef5077cec18a26e1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/**
 * Copyright (c) 2018 Redpine Signals 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 "rsi_main.h"
#include "rsi_coex.h"
#include "rsi_mgmt.h"
#include "rsi_hal.h"

static enum rsi_coex_queues rsi_coex_determine_coex_q
			(struct rsi_coex_ctrl_block *coex_cb)
{
	enum rsi_coex_queues q_num = RSI_COEX_Q_INVALID;

	if (skb_queue_len(&coex_cb->coex_tx_qs[RSI_COEX_Q_COMMON]) > 0)
		q_num = RSI_COEX_Q_COMMON;
	if (skb_queue_len(&coex_cb->coex_tx_qs[RSI_COEX_Q_BT]) > 0)
		q_num = RSI_COEX_Q_BT;
	if (skb_queue_len(&coex_cb->coex_tx_qs[RSI_COEX_Q_WLAN]) > 0)
		q_num = RSI_COEX_Q_WLAN;

	return q_num;
}

static void rsi_coex_sched_tx_pkts(struct rsi_coex_ctrl_block *coex_cb)
{
	enum rsi_coex_queues coex_q = RSI_COEX_Q_INVALID;
	struct sk_buff *skb;

	do {
		coex_q = rsi_coex_determine_coex_q(coex_cb);
		rsi_dbg(INFO_ZONE, "queue = %d\n", coex_q);

		if (coex_q == RSI_COEX_Q_BT) {
			skb = skb_dequeue(&coex_cb->coex_tx_qs[RSI_COEX_Q_BT]);
			rsi_send_bt_pkt(coex_cb->priv, skb);
		}
	} while (coex_q != RSI_COEX_Q_INVALID);
}

static void rsi_coex_scheduler_thread(struct rsi_common *common)
{
	struct rsi_coex_ctrl_block *coex_cb =
		(struct rsi_coex_ctrl_block *)common->coex_cb;
	u32 timeout = EVENT_WAIT_FOREVER;

	do {
		rsi_wait_event(&coex_cb->coex_tx_thread.event, timeout);
		rsi_reset_event(&coex_cb->coex_tx_thread.event);

		rsi_coex_sched_tx_pkts(coex_cb);
	} while (atomic_read(&coex_cb->coex_tx_thread.thread_done) == 0);

	complete_and_exit(&coex_cb->coex_tx_thread.completion, 0);
}

int rsi_coex_recv_pkt(struct rsi_common *common, u8 *msg)
{
	u8 msg_type = msg[RSI_RX_DESC_MSG_TYPE_OFFSET];

	switch (msg_type) {
	case COMMON_CARD_READY_IND:
		rsi_dbg(INFO_ZONE, "common card ready received\n");
		common->hibernate_resume = false;
		rsi_handle_card_ready(common, msg);
		break;
	case SLEEP_NOTIFY_IND:
		rsi_dbg(INFO_ZONE, "sleep notify received\n");
		rsi_mgmt_pkt_recv(common, msg);
		break;
	}

	return 0;
}

static inline int rsi_map_coex_q(u8 hal_queue)
{
	switch (hal_queue) {
	case RSI_COEX_Q:
		return RSI_COEX_Q_COMMON;
	case RSI_WLAN_Q:
		return RSI_COEX_Q_WLAN;
	case RSI_BT_Q:
		return RSI_COEX_Q_BT;
	}
	return RSI_COEX_Q_INVALID;
}

int rsi_coex_send_pkt(void *priv, struct sk_buff *skb, u8 hal_queue)
{
	struct rsi_common *common = (struct rsi_common *)priv;
	struct rsi_coex_ctrl_block *coex_cb =
		(struct rsi_coex_ctrl_block *)common->coex_cb;
	struct skb_info *tx_params = NULL;
	enum rsi_coex_queues coex_q;
	int status;

	coex_q = rsi_map_coex_q(hal_queue);
	if (coex_q == RSI_COEX_Q_INVALID) {
		rsi_dbg(ERR_ZONE, "Invalid coex queue\n");
		return -EINVAL;
	}
	if (coex_q != RSI_COEX_Q_COMMON &&
	    coex_q != RSI_COEX_Q_WLAN) {
		skb_queue_tail(&coex_cb->coex_tx_qs[coex_q], skb);
		rsi_set_event(&coex_cb->coex_tx_thread.event);
		return 0;
	}
	if (common->iface_down) {
		tx_params =
			(struct skb_info *)&IEEE80211_SKB_CB(skb)->driver_data;

		if (!(tx_params->flags & INTERNAL_MGMT_PKT)) {
			rsi_indicate_tx_status(common->priv, skb, -EINVAL);
			return 0;
		}
	}

	/* Send packet to hal */
	if (skb->priority == MGMT_SOFT_Q)
		status = rsi_send_mgmt_pkt(common, skb);
	else
		status = rsi_send_data_pkt(common, skb);

	return status;
}

int rsi_coex_attach(struct rsi_common *common)
{
	struct rsi_coex_ctrl_block *coex_cb;
	int cnt;

	coex_cb = kzalloc(sizeof(*coex_cb), GFP_KERNEL);
	if (!coex_cb)
		return -ENOMEM;

	common->coex_cb = (void *)coex_cb;
	coex_cb->priv = common;

	/* Initialize co-ex queues */
	for (cnt = 0; cnt < NUM_COEX_TX_QUEUES; cnt++)
		skb_queue_head_init(&coex_cb->coex_tx_qs[cnt]);
	rsi_init_event(&coex_cb->coex_tx_thread.event);

	/* Initialize co-ex thread */
	if (rsi_create_kthread(common,
			       &coex_cb->coex_tx_thread,
			       rsi_coex_scheduler_thread,
			       "Coex-Tx-Thread")) {
		rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__);
		return -EINVAL;
	}
	return 0;
}

void rsi_coex_detach(struct rsi_common *common)
{
	struct rsi_coex_ctrl_block *coex_cb =
		(struct rsi_coex_ctrl_block *)common->coex_cb;
	int cnt;

	rsi_kill_thread(&coex_cb->coex_tx_thread);

	for (cnt = 0; cnt < NUM_COEX_TX_QUEUES; cnt++)
		skb_queue_purge(&coex_cb->coex_tx_qs[cnt]);

	kfree(coex_cb);
}