Release 4.18 drivers/net/wireless/rsi/rsi_91x_coex.c
/**
* 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;
}
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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);
}
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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);
}
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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;
}
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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;
}
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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;
}
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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;
}
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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);
}
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