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SmartAudio/lichee/linux-4.9/drivers/net/wireless/xr829/wlan/bh.c

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/*
* Data Transmission thread implementation for XRadio drivers
*
* Copyright (c) 2013
* Xradio Technology Co., Ltd. <www.xradiotech.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <net/mac80211.h>
#include <linux/kthread.h>
#include "xradio.h"
#include "bh.h"
#include "hwio.h"
#include "wsm.h"
#include "sbus.h"
#ifdef SUPPORT_FW_DBG_INF
#include "fw_dbg_inf.h"
#endif
/* TODO: Verify these numbers with WSM specification. */
#define DOWNLOAD_BLOCK_SIZE_WR (0x1000 - 4)
/* an SPI message cannot be bigger than (2"12-1)*2 bytes
* "*2" to cvt to bytes */
#define MAX_SZ_RD_WR_BUFFERS (DOWNLOAD_BLOCK_SIZE_WR*2)
#define PIGGYBACK_CTRL_REG (2)
#define EFFECTIVE_BUF_SIZE (MAX_SZ_RD_WR_BUFFERS - PIGGYBACK_CTRL_REG)
#define DEV_WAKEUP_MAX_TIME (HZ<<1) /* =HZ*2 = 2s*/
#define DEV_WAKEUP_WAIT_TIME (HZ/50) /*=20ms*/
#define BH_TX_BURST_NONTXOP (16)
#if (SDIO_BLOCK_SIZE > 500)
#define SKB_CACHE_LEN (SDIO_BLOCK_SIZE)
#elif (SDIO_BLOCK_SIZE > 250)
#define SKB_CACHE_LEN (SDIO_BLOCK_SIZE<<1)
#else
#define SKB_CACHE_LEN xr_sdio_blksize_align(500)
#endif
#define SKB_RESV_MAX (1900)
int tx_burst_limit = BH_TX_BURST_NONTXOP;
/* Suspend state privates */
enum xradio_bh_pm_state {
XRADIO_BH_RESUMED = 0,
XRADIO_BH_SUSPEND,
XRADIO_BH_SUSPENDED,
XRADIO_BH_RESUME,
};
typedef int (*xradio_wsm_handler) (struct xradio_common *hw_priv, u8 *data,
size_t size);
static inline u32 bh_time_interval(struct timeval *oldtime)
{
u32 time_int;
struct timeval newtime;
do_gettimeofday(&newtime);
time_int = (newtime.tv_sec - oldtime->tv_sec) * 1000000 + \
(long)(newtime.tv_usec - oldtime->tv_usec);
return time_int;
}
#ifdef MCAST_FWDING
int wsm_release_buffer_to_fw(struct xradio_vif *priv, int count);
#endif
static int xradio_bh(void *arg);
static void xradio_put_skb(struct xradio_common *hw_priv, struct sk_buff *skb);
static struct sk_buff *xradio_get_skb(struct xradio_common *hw_priv, size_t len, u8 *flags);
static inline int xradio_put_resv_skb(struct xradio_common *hw_priv,
struct sk_buff *skb, u8 flags);
#ifdef BH_PROC_THREAD
static int xradio_proc(void *arg);
int bh_proc_init(struct xradio_common *hw_priv)
{
int ret = 0;
int i;
struct bh_items *pool = NULL;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
memset(&hw_priv->proc, 0, sizeof(struct bh_proc));
/* init locks and wait_queue */
spin_lock_init(&hw_priv->proc.lock);
init_waitqueue_head(&hw_priv->proc.proc_wq);
/* init pool and txrx queues */
atomic_set(&hw_priv->proc.proc_tx, 0);
atomic_set(&hw_priv->proc.rx_queued, 0);
atomic_set(&hw_priv->proc.tx_queued, 0);
INIT_LIST_HEAD(&hw_priv->proc.bh_tx);
INIT_LIST_HEAD(&hw_priv->proc.bh_rx);
INIT_LIST_HEAD(&hw_priv->proc.bh_free);
pool = xr_kzalloc(PROC_POOL_SIZE, false);
if (!pool)
return -ENOMEM;
else
hw_priv->proc.bh_pool[0] = pool;
for (i = 0; i < ITEM_RESERVED; ++i)
list_add_tail(&pool[i].head, &hw_priv->proc.bh_free);
/* init proc thread.*/
hw_priv->proc.proc_state = 0;
hw_priv->proc.proc_thread =
kthread_create(&xradio_proc, hw_priv, XRADIO_PROC_THREAD);
if (IS_ERR(hw_priv->proc.proc_thread)) {
ret = PTR_ERR(hw_priv->proc.proc_thread);
hw_priv->proc.proc_thread = NULL;
} else {
#ifdef HAS_PUT_TASK_STRUCT
get_task_struct(hw_priv->proc.proc_thread);
#endif
wake_up_process(hw_priv->proc.proc_thread);
}
return ret;
}
int bh_proc_flush_txqueue(struct xradio_common *hw_priv, int if_id)
{
struct bh_items *item = NULL, *tmp = NULL;
spin_lock(&hw_priv->proc.lock);
/*flush proc tx queue, no need to dev_kfree_skb */
list_for_each_entry_safe(item, tmp, &hw_priv->proc.bh_tx, head) {
if (item) {
if (XRWL_ALL_IFS == if_id || item->if_id == if_id) {
item->data = NULL;
list_move_tail(&item->head, &hw_priv->proc.bh_free);
atomic_sub(1, &hw_priv->proc.tx_queued);
}
} else {
bh_printk(XRADIO_DBG_ERROR,
"%s tx item is NULL!\n", __func__);
}
}
if (XRWL_ALL_IFS == if_id) {
INIT_LIST_HEAD(&hw_priv->proc.bh_tx);
atomic_set(&hw_priv->proc.tx_queued, 0);
atomic_set(&hw_priv->proc.proc_tx, 0);
}
spin_unlock(&hw_priv->proc.lock);
return 0;
}
int bh_proc_flush_queue(struct xradio_common *hw_priv)
{
struct bh_items *item = NULL;
spin_lock(&hw_priv->proc.lock);
/*flush proc rx queue */
while (!list_empty(&hw_priv->proc.bh_rx)) {
item = list_first_entry(&hw_priv->proc.bh_rx,
struct bh_items, head);
if (item) {
if (item->data) {
dev_kfree_skb((struct sk_buff *)item->data);
item->data = NULL;
} else {
bh_printk(XRADIO_DBG_ERROR,
"%s item->data is NULL!\n", __func__);
}
list_move_tail(&item->head, &hw_priv->proc.bh_free);
} else {
bh_printk(XRADIO_DBG_ERROR,
"%s rx item is NULL!\n", __func__);
}
}
INIT_LIST_HEAD(&hw_priv->proc.bh_rx);
atomic_set(&hw_priv->proc.rx_queued, 0);
spin_unlock(&hw_priv->proc.lock);
/*flush proc tx queue, no need to dev_kfree_skb */
bh_proc_flush_txqueue(hw_priv, XRWL_ALL_IFS);
return 0;
}
void bh_proc_deinit(struct xradio_common *hw_priv)
{
struct task_struct *thread = hw_priv->proc.proc_thread;
int i = 0;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
/* deinit proc thread */
if (thread) {
hw_priv->proc.proc_thread = NULL;
kthread_stop(thread);
#ifdef HAS_PUT_TASK_STRUCT
put_task_struct(thread);
#endif
} else {
bh_printk(XRADIO_DBG_WARN,
"%s thread is NULL!\n", __func__);
}
/* clear tx/rx queue */
bh_proc_flush_queue(hw_priv);
/* clear free queue */
INIT_LIST_HEAD(&hw_priv->proc.bh_free);
/*free proc pool*/
for (i = 0; i < PROC_POOL_NUM; i++) {
if (hw_priv->proc.bh_pool[i]) {
kfree(hw_priv->proc.bh_pool[i]);
hw_priv->proc.bh_pool[i] = NULL;
} else if (i == 0) {
bh_printk(XRADIO_DBG_WARN,
"%s bh_pool[0] is NULL!\n", __func__);
}
}
return ;
}
int bh_proc_reinit(struct xradio_common *hw_priv)
{
bh_proc_deinit(hw_priv);
return bh_proc_init(hw_priv);
}
static struct bh_items *xradio_get_free_item(struct xradio_common *hw_priv)
{
struct bh_items *item = NULL;
if (likely(!list_empty(&hw_priv->proc.bh_free))) {
item = list_first_entry(&hw_priv->proc.bh_free,
struct bh_items, head);
} else {
int i = 0;
struct bh_items *pool = NULL;
for (i = 0; i < PROC_POOL_NUM; i++) {
if (!hw_priv->proc.bh_pool[i]) {
pool = xr_kzalloc(PROC_POOL_SIZE, false);
hw_priv->proc.bh_pool[i] = pool;
break;
}
}
if (pool) {
bh_printk(XRADIO_DBG_WARN, "%s alloc pool%d!\n",
__func__, i);
for (i = 0; i < ITEM_RESERVED; ++i)
list_add_tail(&pool[i].head, &hw_priv->proc.bh_free);
item = list_first_entry(&hw_priv->proc.bh_free,
struct bh_items, head);
} else {
bh_printk(XRADIO_DBG_ERROR, "%s Failed alloc pool%d!\n",
__func__, i);
}
}
return item;
}
void xradio_proc_wakeup(struct xradio_common *hw_priv)
{
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
#if BH_PROC_TX
if (atomic_add_return(1, &hw_priv->proc.proc_tx) == 1) {
bh_printk(XRADIO_DBG_NIY, "%s\n", __func__);
wake_up(&hw_priv->proc.proc_wq);
}
#else
xradio_bh_wakeup(hw_priv);
#endif
}
#if PERF_INFO_TEST
struct timeval proc_start_time;
#endif
#if BH_PROC_DPA
#define PROC_HIGH_IDX 0
#define PROC_LOW_IDX 4
const struct thread_dpa g_dpa[] = {
{SCHED_FIFO, 25},
{SCHED_FIFO, 50},
{SCHED_FIFO, 75},
{SCHED_FIFO, 99},
{SCHED_NORMAL, 0}
};
int thread_dpa_up(struct task_struct *p, s8 *prio_index)
{
int ret = 0;
s8 idx = 0;
if (unlikely(!p || !prio_index)) {
bh_printk(XRADIO_DBG_ERROR,
"%s, task_struct=%p, prio_index=%p\n",
__func__, p, prio_index);
return -EINVAL;
}
idx = (*prio_index) - 1;
if (idx > PROC_HIGH_IDX) {
struct sched_param param = {
.sched_priority = g_dpa[idx].priority
};
bh_printk(XRADIO_DBG_NIY, "%s=%d\n", __func__, idx);
ret = sched_setscheduler(p, g_dpa[idx].policy, &param);
if (!ret)
*prio_index = idx;
else
bh_printk(XRADIO_DBG_ERROR,
"%s, sched_setscheduler failed, idx=%d\n",
__func__, idx);
return ret;
} else {
bh_printk(XRADIO_DBG_NIY, "%s, prio_index=%d\n",
__func__, idx + 1);
return 0;
}
}
int thread_dpa_down(struct task_struct *p, u8 *prio_index)
{
int ret = 0;
s8 idx = 0;
if (unlikely(!p || !prio_index)) {
bh_printk(XRADIO_DBG_ERROR,
"%s, task_struct=%p, prio_index=%p\n",
__func__, p, prio_index);
return -EINVAL;
}
idx = (*prio_index) + 1;
if (idx < PROC_LOW_IDX) {
struct sched_param param = {
.sched_priority = g_dpa[idx].priority
};
bh_printk(XRADIO_DBG_NIY, "%s=%d\n", __func__, idx);
ret = sched_setscheduler(p, g_dpa[idx].policy, &param);
if (!ret)
*prio_index = idx;
else
bh_printk(XRADIO_DBG_ERROR,
"%s, sched_setscheduler failed, idx=%d\n",
__func__, idx);
return ret;
} else {
bh_printk(XRADIO_DBG_NIY, "%s, prio_index=%d\n",
__func__, idx - 1);
return 0;
}
}
static inline int proc_set_priority(struct xradio_common *hw_priv, u8 idx)
{
struct sched_param param = {
.sched_priority = g_dpa[idx].priority
};
hw_priv->proc.proc_prio = idx;
return sched_setscheduler(hw_priv->proc.proc_thread,
g_dpa[idx].policy, &param);
}
int dpa_proc_tx;
int dpa_proc_rx;
u32 proc_dpa_cnt;
u32 proc_up_cnt;
u32 proc_down_cnt;
static inline int proc_dpa_update(struct xradio_common *hw_priv)
{
int tx_ret = 0;
int rx_ret = 0;
int dpa_old = 0;
int i = 0;
if (!hw_priv->proc.proc_thread)
return -ENOENT;
++proc_dpa_cnt;
/*update by rx.*/
dpa_old = dpa_proc_rx;
dpa_proc_rx = atomic_read(&hw_priv->proc.rx_queued);
if (dpa_proc_rx >= (ITEM_RESERVED>>2) ||
dpa_proc_rx >= (dpa_old + 10)) {
rx_ret = 1;
} else if ((dpa_proc_rx + 20) < dpa_old ||
dpa_proc_rx < (ITEM_RESERVED>>5)) {
rx_ret = -1;
}
/* update by tx.*/
dpa_old = dpa_proc_tx;
for (dpa_proc_tx = 0, i = 0; i < 4; ++i) {
dpa_proc_tx += hw_priv->tx_queue[i].num_queued -
hw_priv->tx_queue[i].num_pending;
}
if (dpa_proc_tx > (dpa_old + 10) ||
dpa_proc_tx > XRWL_HOST_VIF0_11N_THROTTLE) {
tx_ret = 1;
} else if ((dpa_proc_tx + 10) < dpa_old ||
dpa_proc_tx < (XRWL_HOST_VIF0_11N_THROTTLE>>2)) {
tx_ret = -1;
}
if (rx_ret > 0 || tx_ret > 0) {
++proc_up_cnt;
if (++hw_priv->proc.prio_cnt > 10) {
hw_priv->proc.prio_cnt = 0;
return thread_dpa_up(hw_priv->proc.proc_thread,
&hw_priv->proc.proc_prio);
}
} else if (rx_ret < 0 && tx_ret < 0) {
++proc_down_cnt;
if (--hw_priv->proc.prio_cnt < -10) {
hw_priv->proc.prio_cnt = 0;
return thread_dpa_down(hw_priv->proc.proc_thread,
&hw_priv->proc.proc_prio);
}
}
return 0;
}
#endif
static inline int xradio_proc(void *arg)
{
struct xradio_common *hw_priv = arg;
#if !BH_PROC_DPA
struct sched_param param = {
.sched_priority = 99
};
#endif
int ret = 0;
int term = 0;
int tx = 0;
int rx = 0;
#if BH_PROC_DPA
int dpa_num = 0;
#endif
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
#if BH_PROC_DPA
ret = proc_set_priority(hw_priv, 3);
#else
ret = sched_setscheduler(hw_priv->proc.proc_thread,
SCHED_FIFO, &param);
#endif
if (ret)
bh_printk(XRADIO_DBG_WARN, "%s sched_setscheduler failed(%d)\n",
__func__, ret);
for (;;) {
PERF_INFO_GETTIME(&proc_start_time);
ret = wait_event_interruptible(hw_priv->proc.proc_wq, ({
term = kthread_should_stop();
#if BH_PROC_RX
rx = atomic_read(&hw_priv->proc.rx_queued);
#else
rx = 0;
#endif
#if BH_PROC_TX
tx = atomic_xchg(&hw_priv->proc.proc_tx, 0);
#else
tx = 0;
#endif
(term || ((rx || tx) &&
!hw_priv->bh_error && !hw_priv->proc.proc_state &&
XRADIO_BH_RESUMED == atomic_read(&hw_priv->bh_suspend))); }));
/* 0--proc is going to be shut down */
if (term) {
bh_printk(XRADIO_DBG_NIY, "%s exit!\n", __func__);
break;
} else if (ret < 0) {
bh_printk(XRADIO_DBG_ERROR, "%s wait_event err=%d!\n",
__func__, ret);
continue; /*continue to wait for exit */
}
PERF_INFO_STAMP_UPDATE(&proc_start_time, &proc_wait, 0);
while (rx || tx) {
bh_printk(XRADIO_DBG_NIY, "%s rx=%d, tx=%d\n",
__func__, rx, tx);
#if BH_PROC_RX
/* 1--handle rx*/
if (rx) {
size_t rx_len = 0;
spin_lock(&hw_priv->proc.lock);
if (likely(!list_empty(&hw_priv->proc.bh_rx))) {
struct bh_items *rx_item = NULL;
struct sk_buff *rx_skb = NULL;
u8 flags = 0;
rx_item = list_first_entry(&hw_priv->proc.bh_rx,
struct bh_items, head);
if (rx_item) {
rx_skb = (struct sk_buff *)rx_item->data;
flags = rx_item->flags;
rx_item->data = NULL;
rx_len = rx_item->datalen;
list_move_tail(&rx_item->head,
&hw_priv->proc.bh_free);
}
rx = atomic_sub_return(1, &hw_priv->proc.rx_queued);
spin_unlock(&hw_priv->proc.lock);
if (rx_skb) {
ret = wsm_handle_rx(hw_priv, rx_item->flags, &rx_skb);
/* Reclaim the SKB buffer */
if (rx_skb) {
if (xradio_put_resv_skb(hw_priv, rx_skb, rx_item->flags))
xradio_put_skb(hw_priv, rx_skb);
rx_skb = NULL;
}
if (ret) {
bh_printk(XRADIO_DBG_ERROR,
"wsm_handle_rx err=%d!\n", ret);
break;
}
} else {
bh_printk(XRADIO_DBG_ERROR,
"%s rx_item data is NULL\n", __func__);
}
hw_priv->proc.rxed_num++;
} else {
rx = 0;
hw_priv->proc.proc_state = 1; /*need to restart proc*/
bh_printk(XRADIO_DBG_WARN,
"rx_queued=%d, but proc.bh_rx is empty!\n",
atomic_read(&hw_priv->proc.rx_queued));
spin_unlock(&hw_priv->proc.lock);
}
PERF_INFO_STAMP_UPDATE(&proc_start_time, &proc_rx, rx_len);
}
#endif
#if BH_PROC_TX
/* 2--handle tx*/
if (tx) {
u8 *data = NULL;
size_t tx_len = 0;
int burst = 0;
int vif_selected = 0;
ret = wsm_get_tx(hw_priv, &data, &tx_len,
&burst, &vif_selected);
if (ret < 0) {
bh_printk(XRADIO_DBG_ERROR,
"wsm_get_tx err=%d!\n", ret);
tx = 0;
break;
} else if (ret) {
struct bh_items *item = NULL;
spin_lock(&hw_priv->proc.lock);
item = xradio_get_free_item(hw_priv);
if (likely(item)) {
SYS_BUG(item->data);
item->data = data;
item->datalen = tx_len;
if (unlikely(item->datalen != tx_len)) {
bh_printk(XRADIO_DBG_ERROR,
"%s datalen=%u, tx_len=%zu.\n",
__func__, item->datalen, tx_len);
}
item->if_id = vif_selected;
item->flags = 0;
list_move_tail(&item->head, &hw_priv->proc.bh_tx);
spin_unlock(&hw_priv->proc.lock);
if (atomic_add_return(1, &hw_priv->proc.tx_queued) == 1 &&
hw_priv->bh_thread) {
xradio_bh_wakeup(hw_priv);
}
hw_priv->proc.txed_num++;
bh_printk(XRADIO_DBG_NIY,
"%s Tx if=%d, datalen=%zu, queued=%d\n",
__func__, vif_selected, tx_len,
atomic_read(&hw_priv->proc.tx_queued));
} else {
bh_printk(XRADIO_DBG_ERROR,
"%s pool is empty\n", __func__);
spin_unlock(&hw_priv->proc.lock);
hw_priv->proc.proc_state = 1; /*need to restart proc*/
break;
}
} else {
tx = 0;
bh_printk(XRADIO_DBG_NIY, "wsm_get_tx no data!\n");
}
PERF_INFO_STAMP_UPDATE(&proc_start_time, &proc_tx, tx_len);
}
#endif
#if BH_PROC_DPA
if (++dpa_num > 20) {
proc_dpa_update(hw_priv);
dpa_num = 0;
}
#endif
} /* while */
if (hw_priv->proc.proc_state) {
/* proc error occurs, to restart driver.*/
hw_priv->bh_error = 1;
}
#if 0
/* for debug */
if (!atomic_read(&hw_priv->proc.proc_tx)) {
int num = 0;
int pending = 0;
int i = 0;
for (i = 0; i < 4; ++i) {
pending += hw_priv->tx_queue[i].num_pending;
num += hw_priv->tx_queue[i].num_queued -
hw_priv->tx_queue[i].num_pending;
}
if (num && !atomic_read(&hw_priv->proc.proc_tx)) {
bh_printk(XRADIO_DBG_NIY,
"%s rx=%d, tx=%d, num=%d, pending=%d,"
" rx_queued=%d, bufuse=%d\n",
__func__, rx, tx, num, pending,
atomic_read(&hw_priv->proc.rx_queued),
hw_priv->hw_bufs_used);
}
}
#endif
} /* for (;;) */
return 0;
}
#if BH_PROC_TX
static inline int xradio_bh_get(struct xradio_common *hw_priv, u8 **data,
size_t *tx_len, int *burst, int *vif_selected)
{
int ret = 0;
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
/* check cmd first */
spin_lock(&hw_priv->wsm_cmd.lock);
if (hw_priv->wsm_cmd.ptr) {
*data = hw_priv->wsm_cmd.ptr;
*tx_len = hw_priv->wsm_cmd.len;
*burst = atomic_read(&hw_priv->proc.tx_queued) + 1;
*vif_selected = -1;
spin_unlock(&hw_priv->wsm_cmd.lock);
return 1;
}
spin_unlock(&hw_priv->wsm_cmd.lock);
/* check tx data */
spin_lock(&hw_priv->proc.lock);
if (!list_empty(&hw_priv->proc.bh_tx) &&
!atomic_read(&hw_priv->tx_lock) &&
hw_priv->hw_bufs_used < hw_priv->wsm_caps.numInpChBufs) {
struct bh_items *item = list_first_entry(
&hw_priv->proc.bh_tx, struct bh_items, head);
if (item && item->data) {
struct xradio_queue_item *queue_item =
(struct xradio_queue_item *)item->data;
queue_item->xmit_timestamp = jiffies;
queue_item->xmit_to_fw = 1;
*data = queue_item->skb->data;
*tx_len = item->datalen;
*vif_selected = item->if_id;
*burst = atomic_sub_return(1, &hw_priv->proc.tx_queued) + 1;
item->data = NULL;
list_move_tail(&item->head, &hw_priv->proc.bh_free);
ret = 1;
bh_printk(XRADIO_DBG_NIY, "%s tx_len=%zu, burst=%d!\n",
__func__, *tx_len, *burst);
} else {
bh_printk(XRADIO_DBG_ERROR, "%s item=%p, data=%p!\n",
__func__, item, item->data);
ret = -ENOENT;
}
}
spin_unlock(&hw_priv->proc.lock);
return ret;
}
#endif
#if PERF_INFO_TEST
struct timeval bh_put_time;
#endif
static inline int xradio_bh_put(struct xradio_common *hw_priv,
struct sk_buff **skb_p, u8 flags)
{
struct bh_items *item = NULL;
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
PERF_INFO_GETTIME(&bh_put_time);
spin_lock(&hw_priv->proc.lock);
if (unlikely(!hw_priv->proc.proc_thread)) {
spin_unlock(&hw_priv->proc.lock);
bh_printk(XRADIO_DBG_WARN,
"%s proc_thread is stopped!\n", __func__);
dev_kfree_skb(*skb_p);
*skb_p = NULL;
return 0;
}
item = xradio_get_free_item(hw_priv);
if (likely(item)) {
SYS_BUG(item->data);
item->data = (u8 *)(*skb_p);
item->datalen = (*skb_p)->len;
if (unlikely(item->datalen != (*skb_p)->len)) {
bh_printk(XRADIO_DBG_ERROR,
"%s datalen=%u, skblen=%u.\n",
__func__, item->datalen, (*skb_p)->len);
}
item->flags = flags;
if ((flags & ITEM_F_CMDCFM))
list_move(&item->head, &hw_priv->proc.bh_rx);
else
list_move_tail(&item->head, &hw_priv->proc.bh_rx);
spin_unlock(&hw_priv->proc.lock);
PERF_INFO_STAMP_UPDATE(&bh_put_time, &get_item, 0);
if (atomic_add_return(1, &hw_priv->proc.rx_queued) == 1) {
wake_up(&hw_priv->proc.proc_wq);
}
*skb_p = NULL;
PERF_INFO_STAMP(&bh_put_time, &wake_proc, 0);
} else {
bh_printk(XRADIO_DBG_ERROR,
"%s pool is empty!\n", __func__);
goto err;
}
return 0;
err:
spin_unlock(&hw_priv->proc.lock);
return -ENOENT;
}
#endif /* #ifdef BH_PROC_THREAD */
int xradio_register_bh(struct xradio_common *hw_priv)
{
int err = 0;
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
SYS_BUG(hw_priv->bh_thread);
atomic_set(&hw_priv->bh_rx, 0);
atomic_set(&hw_priv->bh_tx, 0);
atomic_set(&hw_priv->bh_term, 0);
atomic_set(&hw_priv->bh_suspend, XRADIO_BH_RESUMED);
hw_priv->buf_id_tx = 0;
hw_priv->buf_id_rx = 0;
#ifdef BH_USE_SEMAPHORE
sema_init(&hw_priv->bh_sem, 0);
atomic_set(&hw_priv->bh_wk, 0);
#else
init_waitqueue_head(&hw_priv->bh_wq);
#endif
init_waitqueue_head(&hw_priv->bh_evt_wq);
hw_priv->bh_thread = kthread_create(&xradio_bh, hw_priv, XRADIO_BH_THREAD);
if (IS_ERR(hw_priv->bh_thread)) {
err = PTR_ERR(hw_priv->bh_thread);
hw_priv->bh_thread = NULL;
} else {
#ifdef HAS_PUT_TASK_STRUCT
get_task_struct(hw_priv->bh_thread);
#endif
wake_up_process(hw_priv->bh_thread);
}
return err;
}
void xradio_unregister_bh(struct xradio_common *hw_priv)
{
struct task_struct *thread = hw_priv->bh_thread;
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
if (SYS_WARN(!thread))
return;
hw_priv->bh_thread = NULL;
kthread_stop(thread);
#ifdef HAS_PUT_TASK_STRUCT
put_task_struct(thread);
#endif
bh_printk(XRADIO_DBG_NIY, "Unregister success.\n");
}
void xradio_irq_handler(struct xradio_common *hw_priv)
{
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
DBG_INT_ADD(irq_count);
if (/* SYS_WARN */(hw_priv->bh_error))
return;
#ifdef BH_USE_SEMAPHORE
atomic_add(1, &hw_priv->bh_rx);
if (atomic_add_return(1, &hw_priv->bh_wk) == 1) {
up(&hw_priv->bh_sem);
}
#else
if (atomic_add_return(1, &hw_priv->bh_rx) == 1) {
wake_up(&hw_priv->bh_wq);
}
#endif
}
void xradio_bh_wakeup(struct xradio_common *hw_priv)
{
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
if (hw_priv->bh_error) {
bh_printk(XRADIO_DBG_ERROR, "%s bh_error=%d\n",
__func__, hw_priv->bh_error);
return;
}
#ifdef BH_USE_SEMAPHORE
atomic_add(1, &hw_priv->bh_tx);
if (atomic_add_return(1, &hw_priv->bh_wk) == 1) {
up(&hw_priv->bh_sem);
}
#else
if (atomic_add_return(1, &hw_priv->bh_tx) == 1) {
wake_up(&hw_priv->bh_wq);
}
#endif
}
int xradio_bh_suspend(struct xradio_common *hw_priv)
{
#ifdef MCAST_FWDING
int i = 0;
struct xradio_vif *priv = NULL;
#endif
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
if (hw_priv->bh_thread == NULL) {
return 0;
}
if (hw_priv->bh_error) {
return -EINVAL;
}
#ifdef MCAST_FWDING
xradio_for_each_vif(hw_priv, priv, i) {
if (!priv)
continue;
if ((priv->multicast_filter.enable)
&& (priv->join_status == XRADIO_JOIN_STATUS_AP)) {
wsm_release_buffer_to_fw(priv,
(hw_priv->wsm_caps.
numInpChBufs - 1));
break;
}
}
#endif
atomic_set(&hw_priv->bh_suspend, XRADIO_BH_SUSPEND);
#ifdef BH_USE_SEMAPHORE
up(&hw_priv->bh_sem);
#else
wake_up(&hw_priv->bh_wq);
#endif
return wait_event_timeout(hw_priv->bh_evt_wq, (hw_priv->bh_error ||
XRADIO_BH_SUSPENDED == atomic_read(&hw_priv->bh_suspend)),
1 * HZ) ? 0 : -ETIMEDOUT;
}
int xradio_bh_resume(struct xradio_common *hw_priv)
{
#ifdef MCAST_FWDING
int ret;
int i = 0;
struct xradio_vif *priv = NULL;
#endif
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
if (hw_priv->bh_error || atomic_read(&hw_priv->bh_term)) {
return -EINVAL;
}
atomic_set(&hw_priv->bh_suspend, XRADIO_BH_RESUME);
#ifdef BH_USE_SEMAPHORE
up(&hw_priv->bh_sem);
#else
wake_up(&hw_priv->bh_wq);
#endif
#ifdef MCAST_FWDING
ret = wait_event_timeout(hw_priv->bh_evt_wq, (hw_priv->bh_error ||
XRADIO_BH_RESUMED == atomic_read(&hw_priv->bh_suspend)), 1 * HZ) ?
0 : -ETIMEDOUT;
xradio_for_each_vif(hw_priv, priv, i) {
if (!priv)
continue;
if ((priv->join_status == XRADIO_JOIN_STATUS_AP) &&
(priv->multicast_filter.enable)) {
u8 count = 0;
SYS_WARN(wsm_request_buffer_request(priv, &count));
bh_printk(XRADIO_DBG_NIY, "Reclaim Buff %d \n", count);
break;
}
}
return ret;
#else
return wait_event_timeout(hw_priv->bh_evt_wq, hw_priv->bh_error ||
(XRADIO_BH_RESUMED == atomic_read(&hw_priv->bh_suspend)),
1 * HZ) ? 0 : -ETIMEDOUT;
#endif
}
static inline void wsm_alloc_tx_buffer(struct xradio_common *hw_priv)
{
++hw_priv->hw_bufs_used;
}
int wsm_release_tx_buffer(struct xradio_common *hw_priv, int count)
{
int ret = 0;
int hw_bufs_used = hw_priv->hw_bufs_used;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
hw_priv->hw_bufs_used -= count;
if (SYS_WARN(hw_priv->hw_bufs_used < 0)) {
/* Tx data patch stops when all but one hw buffers are used.
So, re-start tx path in case we find hw_bufs_used equals
numInputChBufs - 1.
*/
bh_printk(XRADIO_DBG_ERROR, "%s, hw_bufs_used=%d, count=%d.\n",
__func__, hw_priv->hw_bufs_used, count);
ret = -1;
} else if (hw_bufs_used >= (hw_priv->wsm_caps.numInpChBufs - 1))
ret = 1;
if (!hw_priv->hw_bufs_used)
wake_up(&hw_priv->bh_evt_wq);
return ret;
}
int wsm_release_vif_tx_buffer(struct xradio_common *hw_priv,
int if_id, int count)
{
int ret = 0;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
hw_priv->hw_bufs_used_vif[if_id] -= count;
if (!hw_priv->hw_bufs_used_vif[if_id])
wake_up(&hw_priv->bh_evt_wq);
if (hw_priv->hw_bufs_used_vif[if_id] < 0) {
bh_printk(XRADIO_DBG_WARN,
"%s, if=%d, used=%d, count=%d.\n", __func__, if_id,
hw_priv->hw_bufs_used_vif[if_id], count);
ret = -1;
}
return ret;
}
#ifdef MCAST_FWDING
int wsm_release_buffer_to_fw(struct xradio_vif *priv, int count)
{
int i;
u8 flags;
struct wsm_hdr *wsm;
struct xradio_common *hw_priv = priv->hw_priv;
struct wsm_buf *buf = &hw_priv->wsm_release_buf;
size_t buf_len = buf->end - buf->begin;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
if (priv->join_status != XRADIO_JOIN_STATUS_AP || buf_len == 0) {
return 0;
}
bh_printk(XRADIO_DBG_NIY, "Rel buffer to FW %d, %d\n",
count, hw_priv->hw_bufs_used);
for (i = 0; i < count; i++) {
if ((hw_priv->hw_bufs_used + 1) < hw_priv->wsm_caps.numInpChBufs) {
/* Fill Buffer Request Msg */
flags = i ? 0 : 0x1;
buf->data[0] = flags;
/* Add sequence number */
wsm = (struct wsm_hdr *)buf->begin;
wsm->id &= __cpu_to_le32(~WSM_TX_SEQ(WSM_TX_SEQ_MAX));
wsm->id |= cpu_to_le32(WSM_TX_SEQ(hw_priv->wsm_tx_seq));
bh_printk(XRADIO_DBG_NIY, "REL %d, len=%d, buflen=%zu\n",
hw_priv->wsm_tx_seq, wsm->len, buf_len);
wsm_alloc_tx_buffer(hw_priv);
if (SYS_WARN(xradio_data_write(hw_priv, buf->begin, buf_len))) {
break;
}
hw_priv->buf_released = 1;
hw_priv->wsm_tx_seq = (hw_priv->wsm_tx_seq + 1) & WSM_TX_SEQ_MAX;
} else
break;
}
if (i == count) {
return 0;
}
/* Should not be here */
bh_printk(XRADIO_DBG_ERROR, "Error, Less HW buf %d,%d.\n",
hw_priv->hw_bufs_used, hw_priv->wsm_caps.numInpChBufs);
SYS_WARN(1);
return -1;
}
#endif
/* reserve a packet for the case dev_alloc_skb failed in bh.*/
int xradio_init_resv_skb(struct xradio_common *hw_priv)
{
int len = SKB_RESV_MAX + WSM_TX_EXTRA_HEADROOM + \
8 + 12; /* TKIP IV + ICV and MIC */
len = xr_sdio_blksize_align(len);
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
spin_lock_init(&hw_priv->cache_lock);
hw_priv->skb_reserved = xr_alloc_skb(len);
if (hw_priv->skb_reserved) {
hw_priv->skb_resv_len = len;
skb_reserve(hw_priv->skb_reserved,
WSM_TX_EXTRA_HEADROOM + 8 /* TKIP IV */
- WSM_RX_EXTRA_HEADROOM);
} else {
bh_printk(XRADIO_DBG_WARN, "%s xr_alloc_skb failed(%d)\n",
__func__, len);
}
return 0;
}
void xradio_deinit_resv_skb(struct xradio_common *hw_priv)
{
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
if (hw_priv->skb_reserved) {
dev_kfree_skb(hw_priv->skb_reserved);
hw_priv->skb_reserved = NULL;
hw_priv->skb_resv_len = 0;
}
}
int xradio_realloc_resv_skb(struct xradio_common *hw_priv,
struct sk_buff *skb, u8 flags)
{
/* spin_lock(&hw_priv->cache_lock); */
if (!hw_priv->skb_reserved && hw_priv->skb_resv_len) {
hw_priv->skb_reserved = xr_alloc_skb(hw_priv->skb_resv_len);
if (!hw_priv->skb_reserved && (flags & ITEM_F_RESERVE)) {
hw_priv->skb_reserved = skb;
skb_reserve(hw_priv->skb_reserved,
WSM_TX_EXTRA_HEADROOM + 8 /* TKIP IV */
- WSM_RX_EXTRA_HEADROOM);
/* spin_unlock(&hw_priv->cache_lock); */
bh_printk(XRADIO_DBG_WARN, "%s xr_alloc_skb failed(%d)\n",
__func__, hw_priv->skb_resv_len);
return -1;
}
}
/* spin_unlock(&hw_priv->cache_lock); */
return 0; /* realloc sbk success, deliver to upper.*/
}
static inline struct sk_buff *xradio_get_resv_skb(struct xradio_common *hw_priv,
size_t len)
{ struct sk_buff *skb = NULL;
/* spin_lock(&hw_priv->cache_lock); */
if (hw_priv->skb_reserved && len <= hw_priv->skb_resv_len) {
skb = hw_priv->skb_reserved;
hw_priv->skb_reserved = NULL;
}
/* spin_unlock(&hw_priv->cache_lock); */
return skb;
}
static inline int xradio_put_resv_skb(struct xradio_common *hw_priv,
struct sk_buff *skb, u8 flags)
{
/* spin_lock(&hw_priv->cache_lock); */
if (!hw_priv->skb_reserved && hw_priv->skb_resv_len &&
(flags & ITEM_F_RESERVE)) {
hw_priv->skb_reserved = skb;
/* spin_unlock(&hw_priv->cache_lock); */
return 0;
}
/* spin_unlock(&hw_priv->cache_lock); */
return 1; /* sbk not put to reserve*/
}
static struct sk_buff *xradio_get_skb(struct xradio_common *hw_priv, size_t len, u8 *flags)
{
struct sk_buff *skb = NULL;
size_t alloc_len = (len > SKB_CACHE_LEN) ? len : SKB_CACHE_LEN;
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
/* TKIP IV + TKIP ICV and MIC - Piggyback.*/
alloc_len += WSM_TX_EXTRA_HEADROOM + 8 + 12 - 2;
if (len > SKB_CACHE_LEN || !hw_priv->skb_cache) {
skb = xr_alloc_skb_pf(alloc_len);
/* In AP mode RXed SKB can be looped back as a broadcast.
* Here we reserve enough space for headers. */
if (skb) {
skb_reserve(skb, WSM_TX_EXTRA_HEADROOM + 8 /* TKIP IV */
- WSM_RX_EXTRA_HEADROOM);
} else {
skb = xradio_get_resv_skb(hw_priv, alloc_len);
if (skb) {
*flags |= ITEM_F_RESERVE;
bh_printk(XRADIO_DBG_WARN, "%s get skb_reserved(%zu)!\n",
__func__, alloc_len);
} else {
bh_printk(XRADIO_DBG_ERROR, "%s xr_alloc_skb failed(%zu)!\n",
__func__, alloc_len);
}
}
} else {
/* don't care cache because min len is SKB_CACHE_LEN*/
/* spin_lock(&hw_priv->cache_lock); */
skb = hw_priv->skb_cache;
hw_priv->skb_cache = NULL;
/* spin_unlock(&hw_priv->cache_lock); */
}
return skb;
}
static void xradio_put_skb(struct xradio_common *hw_priv, struct sk_buff *skb)
{
bh_printk(XRADIO_DBG_TRC, "%s\n", __func__);
/* spin_lock(&hw_priv->cache_lock); */
if (hw_priv->skb_cache)
dev_kfree_skb(skb);
else {
hw_priv->skb_cache = skb;
}
/* spin_unlock(&hw_priv->cache_lock); */
}
static int xradio_bh_read_ctrl_reg(struct xradio_common *hw_priv,
u16 *ctrl_reg)
{
int ret;
ret = xradio_reg_read_16(hw_priv, HIF_CONTROL_REG_ID, ctrl_reg);
if (ret) {
*ctrl_reg = 0;
ret = 0;
bh_printk(XRADIO_DBG_NIY, "read ctrl failed, SDIO DCE occupied!\n");
ret = xradio_reg_read_16(hw_priv, HIF_CONTROL_REG_ID, ctrl_reg);
if (ret) {
hw_priv->bh_error = 1;
bh_printk(XRADIO_DBG_ERROR, "Failed to read control register.\n");
}
}
return ret;
}
static inline int xradio_device_sleep(struct xradio_common *hw_priv)
{
int ret;
ret = xradio_reg_bit_operate(hw_priv, HIF_CONTROL_REG_ID,
0, HIF_CTRL_WUP_BIT);
if (ret) {
hw_priv->bh_error = 1;
bh_printk(XRADIO_DBG_ERROR, "%s:control reg failed.\n", __func__);
}
return ret;
}
struct timeval wakeup_time;
static int xradio_device_wakeup(struct xradio_common *hw_priv)
{
int ret = 0;
u16 ctrl_reg = 0;
unsigned long time = 0;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
PERF_INFO_GETTIME(&wakeup_time);
/* To force the device to be always-on, the host sets WLAN_UP to 1 */
ret = xradio_reg_write_16(hw_priv, HIF_CONTROL_REG_ID, HIF_CTRL_WUP_BIT);
if (SYS_WARN(ret))
return ret;
ret = xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
if (SYS_WARN(ret))
return ret;
/* If the device returns WLAN_RDY as 1, the device is active and will
* remain active. */
time = jiffies + DEV_WAKEUP_MAX_TIME;
while (!(ctrl_reg & (HIF_CTRL_RDY_BIT|HIF_CTRL_NEXT_LEN_MASK)) &&
time_before(jiffies, time) && !ret) {
#ifdef BH_USE_SEMAPHORE
msleep(1);
#else
wait_event_timeout(hw_priv->bh_wq,
atomic_read(&hw_priv->bh_rx), DEV_WAKEUP_WAIT_TIME);
#endif
ret = xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
}
PERF_INFO_STAMP(&wakeup_time, &dev_wake, 0);
if (likely(ctrl_reg & HIF_CTRL_RDY_BIT)) {
bh_printk(XRADIO_DBG_NIY, "Device awake, t=%ldms.\n",
(jiffies+DEV_WAKEUP_MAX_TIME-time)*1000/HZ);
return 1;
} else if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) { /*device has data to rx.*/
bh_printk(XRADIO_DBG_NIY, "To rx data before wakeup, len=%d.\n",
(ctrl_reg & HIF_CTRL_NEXT_LEN_MASK)<<1);
return (int)(ctrl_reg & HIF_CTRL_NEXT_LEN_MASK);
} else {
bh_printk(XRADIO_DBG_ERROR, "Device cannot wakeup in %dms.\n",
DEV_WAKEUP_MAX_TIME*1000/HZ);
return -1;
}
}
#ifdef BH_COMINGRX_FORECAST
static bool xradio_comingrx_update(struct xradio_common *hw_priv)
{
static bool is_full;
static unsigned long tmo;
if (hw_priv->hw_bufs_used >= (hw_priv->wsm_caps.numInpChBufs-1)) {
if (is_full == false) {
tmo = jiffies + (HZ/166);/*1/166s = 6ms*/
}
is_full = true;
} else {
tmo = jiffies - 1;
is_full = false;
}
if (time_before(jiffies, tmo))
return true;
else
return false;
}
#endif
/* Must be called from BH thraed. */
void xradio_enable_powersave(struct xradio_vif *priv, bool enable)
{
priv->powersave_enabled = enable;
bh_printk(XRADIO_DBG_NIY, "Powerave is %s.\n",
enable ? "enabled" : "disabled");
}
#if PERF_INFO_TEST
struct timeval tx_start_time1;
struct timeval tx_start_time2;
struct timeval rx_start_time1;
struct timeval rx_start_time2;
struct timeval bh_start_time;
struct timeval sdio_reg_time;
extern struct timeval last_showtime;
#endif
u32 sdio_reg_cnt1;
u32 sdio_reg_cnt2;
u32 sdio_reg_cnt3;
u32 sdio_reg_cnt4;
u32 sdio_reg_cnt5;
u32 sdio_reg_cnt6;
u32 tx_limit_cnt1;
u32 tx_limit_cnt2;
u32 tx_limit_cnt3;
u32 tx_limit_cnt4;
u32 tx_limit_cnt5;
u32 tx_limit_cnt6;
static int xradio_bh(void *arg)
{
struct xradio_common *hw_priv = arg;
struct sched_param param = {
.sched_priority = 1
};
int ret = 0;
struct sk_buff *skb_rx = NULL;
size_t read_len = 0;
int rx = 0, tx = 0, term, suspend;
struct wsm_hdr *wsm;
size_t wsm_len;
int wsm_id;
u8 wsm_seq;
int rx_resync = 1;
u16 ctrl_reg = 0;
int tx_allowed;
int pending_tx = 0;
int tx_burst;
int tx_bursted = 0;
int rx_burst = 0;
long status;
bool coming_rx = false;
#if 0
u32 dummy;
#endif
int reg_read = 1;
int vif_selected;
bh_printk(XRADIO_DBG_MSG, "%s\n", __func__);
ret = sched_setscheduler(hw_priv->bh_thread, SCHED_FIFO, &param);
if (ret)
bh_printk(XRADIO_DBG_WARN, "%s sched_setscheduler failed(%d)\n",
__func__, ret);
PERF_INFO_GETTIME(&last_showtime);
for (;;) {
PERF_INFO_GETTIME(&bh_start_time);
/* Check if devices can sleep, and set time to wait for interrupt. */
if (!hw_priv->hw_bufs_used && !pending_tx &&
hw_priv->powersave_enabled && !hw_priv->device_can_sleep &&
!atomic_read(&hw_priv->recent_scan) &&
atomic_read(&hw_priv->bh_rx) == 0 &&
atomic_read(&hw_priv->bh_tx) == 0) {
bh_printk(XRADIO_DBG_MSG, "Device idle, can sleep.\n");
SYS_WARN(xradio_device_sleep(hw_priv));
hw_priv->device_can_sleep = true;
status = (HZ>>3); /*1/8s = 125ms*/
} else if (hw_priv->hw_bufs_used >=
(hw_priv->wsm_caps.numInpChBufs - 1)) {
/* don't wait too long if some frames to confirm
* and miss interrupt.*/
status = (HZ>>4); /*1/16s=62ms.*/
} else {
status = (HZ>>3); /*1/8s = 125ms*/
}
#if 0
/* Dummy Read for SDIO retry mechanism */
if (atomic_read(&hw_priv->bh_rx) == 0 &&
atomic_read(&hw_priv->bh_tx) == 0) {
xradio_reg_read(hw_priv, HIF_CONFIG_REG_ID, &dummy, sizeof(dummy));
}
#endif
#if 0
/* If a packet has already been txed to the device then read the
* control register for a probable interrupt miss before going
* further to wait for interrupt; if the read length is non-zero
* then it means there is some data to be received */
if (hw_priv->hw_bufs_used) {
PERF_INFO_GETTIME(&sdio_reg_time);
atomic_xchg(&hw_priv->bh_rx, 0);
xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
++reg_read;
++sdio_reg_cnt1;
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
DBG_INT_ADD(fix_miss_cnt);
rx = 1;
goto data_proc;
} else {
++sdio_reg_cnt5;
}
}
#endif
#ifdef BH_COMINGRX_FORECAST
coming_rx = xradio_comingrx_update(hw_priv);
if (coming_rx) {
PERF_INFO_GETTIME(&sdio_reg_time);
atomic_xchg(&hw_priv->bh_rx, 0);
xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
++reg_read;
++sdio_reg_cnt1;
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
DBG_INT_ADD(fix_miss_cnt);
rx = 1;
goto data_proc;
} else {
++sdio_reg_cnt5;
}
}
#endif
PERF_INFO_GETTIME(&sdio_reg_time);
/* Wait for Events in HZ/8 */
#ifdef BH_USE_SEMAPHORE
rx = atomic_xchg(&hw_priv->bh_rx, 0);
tx = atomic_xchg(&hw_priv->bh_tx, 0);
suspend = pending_tx ? 0 : atomic_read(&hw_priv->bh_suspend);
term = kthread_should_stop();
if (!(rx || tx || coming_rx || term || suspend || hw_priv->bh_error)) {
atomic_set(&hw_priv->bh_wk, 0);
status = (long)(down_timeout(&hw_priv->bh_sem, status) != -ETIME);
rx = atomic_xchg(&hw_priv->bh_rx, 0);
tx = atomic_xchg(&hw_priv->bh_tx, 0);
suspend = pending_tx ? 0 : atomic_read(&hw_priv->bh_suspend);
term = kthread_should_stop();
}
#else
status = wait_event_interruptible_timeout(hw_priv->bh_wq, ({
rx = atomic_xchg(&hw_priv->bh_rx, 0);
tx = atomic_xchg(&hw_priv->bh_tx, 0);
term = kthread_should_stop();
suspend = pending_tx ? 0 : atomic_read(&hw_priv->bh_suspend);
(rx || tx || coming_rx || term || suspend || hw_priv->bh_error); }),
status);
#endif
PERF_INFO_STAMP(&sdio_reg_time, &bh_wait, 0);
/* 0--bh is going to be shut down */
if (term) {
bh_printk(XRADIO_DBG_MSG, "xradio_bh exit!\n");
break;
}
/* 1--An fatal error occurs */
if (status < 0 || hw_priv->bh_error) {
bh_printk(XRADIO_DBG_ERROR, "bh_error=%d, status=%ld\n",
hw_priv->bh_error, status);
hw_priv->bh_error = __LINE__;
break;
}
/* 2--Wait for interrupt time out */
if (!status) {
DBG_INT_ADD(bh_idle);
/* Check if miss interrupt. */
PERF_INFO_GETTIME(&sdio_reg_time);
xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
++reg_read;
++sdio_reg_cnt2;
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
bh_printk(XRADIO_DBG_WARN, "miss interrupt!\n");
DBG_INT_ADD(int_miss_cnt);
rx = 1;
goto data_proc;
} else {
++sdio_reg_cnt5;
}
/* There are some frames to be confirmed. */
if (hw_priv->hw_bufs_used) {
long timeout = 0;
bool pending = 0;
bh_printk(XRADIO_DBG_NIY, "Need confirm:%d!\n",
hw_priv->hw_bufs_used);
/* Check if frame transmission is timed out. */
pending = xradio_query_txpkt_timeout(hw_priv, XRWL_ALL_IFS,
hw_priv->pending_frame_id, &timeout);
/* There are some frames confirm time out. */
if (pending && timeout < 0) {
bh_printk(XRADIO_DBG_ERROR,
"query_txpkt_timeout:%ld!\n", timeout);
hw_priv->bh_error = __LINE__;
break;
}
rx = 1; /* Go to check rx again. */
} else if (!pending_tx) {
if (hw_priv->powersave_enabled &&
!hw_priv->device_can_sleep &&
!atomic_read(&hw_priv->recent_scan)) {
/* Device is idle, we can go to sleep. */
bh_printk(XRADIO_DBG_MSG,
"Device idle(timeout), can sleep.\n");
SYS_WARN(xradio_device_sleep(hw_priv));
hw_priv->device_can_sleep = true;
}
PERF_INFO_STAMP(&bh_start_time, &bh_others, 0);
continue;
}
/* 3--Host suspend request. */
} else if (suspend) {
bh_printk(XRADIO_DBG_NIY, "Host suspend request.\n");
/* Check powersave setting again. */
if (hw_priv->powersave_enabled) {
bh_printk(XRADIO_DBG_MSG,
"Device idle(host suspend), can sleep.\n");
SYS_WARN(xradio_device_sleep(hw_priv));
hw_priv->device_can_sleep = true;
}
/* bh thread go to suspend. */
atomic_set(&hw_priv->bh_suspend, XRADIO_BH_SUSPENDED);
wake_up(&hw_priv->bh_evt_wq);
#ifdef BH_USE_SEMAPHORE
do {
status = down_timeout(&hw_priv->bh_sem, HZ/10);
term = kthread_should_stop();
} while (XRADIO_BH_RESUME != atomic_read(&hw_priv->bh_suspend) &&
!term && !hw_priv->bh_error);
if (XRADIO_BH_RESUME != atomic_read(&hw_priv->bh_suspend))
status = -1;
else
status = 0;
#else
status = wait_event_interruptible(hw_priv->bh_wq, ({
term = kthread_should_stop();
(XRADIO_BH_RESUME == atomic_read(&hw_priv->bh_suspend) ||
term || hw_priv->bh_error); }));
#endif
if (hw_priv->bh_error) {
bh_printk(XRADIO_DBG_ERROR, "bh error during bh suspend.\n");
break;
} else if (term) {
bh_printk(XRADIO_DBG_WARN, "bh exit during bh suspend.\n");
break;
} else if (status < 0) {
bh_printk(XRADIO_DBG_ERROR,
"Failed to wait for resume: %ld.\n", status);
hw_priv->bh_error = __LINE__;
break;
}
bh_printk(XRADIO_DBG_NIY, "Host resume.\n");
atomic_set(&hw_priv->bh_suspend, XRADIO_BH_RESUMED);
wake_up(&hw_priv->bh_evt_wq);
atomic_add(1, &hw_priv->bh_rx);
continue;
}
/* query stuck frames in firmware. */
if (atomic_xchg(&hw_priv->query_cnt, 0)) {
if (schedule_work(&hw_priv->query_work) <= 0)
atomic_add(1, &hw_priv->query_cnt);
}
#if 0
/* If a packet has already been txed to the device then read the
* control register for a probable interrupt miss before going
* further to wait for interrupt; if the read length is non-zero
* then it means there is some data to be received */
if ((hw_priv->wsm_caps.numInpChBufs -
hw_priv->hw_bufs_used) <= 1 && !reg_read) {
PERF_INFO_GETTIME(&sdio_reg_time);
atomic_xchg(&hw_priv->bh_rx, 0);
xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
++sdio_reg_cnt1;
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
DBG_INT_ADD(fix_miss_cnt);
rx = 1;
goto data_proc;
} else {
++sdio_reg_cnt5;
}
}
#endif
/* 4--Rx & Tx process. */
data_proc:
term = kthread_should_stop();
if (hw_priv->bh_error || term)
break;
/*pre-txrx*/
tx_bursted = 0;
rx += atomic_xchg(&hw_priv->bh_rx, 0);
if (rx) {
size_t alloc_len;
u8 *data;
u8 flags;
/* Check ctrl_reg again. */
if (!(ctrl_reg & HIF_CTRL_NEXT_LEN_MASK)) {
PERF_INFO_GETTIME(&sdio_reg_time);
if (SYS_WARN(xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg))) {
hw_priv->bh_error = __LINE__;
break;
}
++reg_read;
++sdio_reg_cnt3;
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
}
PERF_INFO_STAMP(&bh_start_time, &bh_others, 0);
/* read_len=ctrl_reg*2.*/
read_len = (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK)<<1;
if (!read_len) {
++sdio_reg_cnt6;
rx = 0;
goto tx;
}
rx:
reg_read = 0;
flags = 0;
PERF_INFO_GETTIME(&rx_start_time1);
if (SYS_WARN((read_len < sizeof(struct wsm_hdr)) ||
(read_len > EFFECTIVE_BUF_SIZE))) {
bh_printk(XRADIO_DBG_ERROR, "Invalid read len: %zu", read_len);
hw_priv->bh_error = __LINE__;
break;
}
#if BH_PROC_RX
if (unlikely(atomic_read(&hw_priv->proc.rx_queued) >=
((ITEM_RESERVED*PROC_POOL_NUM) - XRWL_MAX_QUEUE_SZ - 1))) {
bh_printk(XRADIO_DBG_WARN,
"Too many rx packets, proc cannot handle in time!\n");
msleep(10);
goto tx; /* too many rx packets to be handled, do tx first*/
}
#endif
/* Add SIZE of PIGGYBACK reg (CONTROL Reg)
* to the NEXT Message length + 2 Bytes for SKB */
read_len = read_len + 2;
alloc_len = hw_priv->sbus_ops->align_size(hw_priv->sbus_priv,
read_len);
/* Check if not exceeding XRADIO capabilities */
if (WARN_ON_ONCE(alloc_len > EFFECTIVE_BUF_SIZE)) {
bh_printk(XRADIO_DBG_ERROR,
"Read aligned len: %zu\n", alloc_len);
} else {
bh_printk(XRADIO_DBG_MSG,
"Rx len=%zu, aligned len=%zu\n",
read_len, alloc_len);
}
/* Get skb buffer. */
skb_rx = xradio_get_skb(hw_priv, alloc_len, &flags);
if (SYS_WARN(!skb_rx)) {
bh_printk(XRADIO_DBG_ERROR, "xradio_get_skb failed.\n");
hw_priv->bh_error = __LINE__;
break;
}
skb_trim(skb_rx, 0);
skb_put(skb_rx, read_len);
data = skb_rx->data;
if (SYS_WARN(!data)) {
bh_printk(XRADIO_DBG_ERROR, "skb data is NULL.\n");
hw_priv->bh_error = __LINE__;
break;
}
PERF_INFO_STAMP(&rx_start_time1, &prepare_rx, alloc_len);
/* Read data from device. */
PERF_INFO_GETTIME(&rx_start_time2);
if (SYS_WARN(xradio_data_read(hw_priv, data, alloc_len))) {
hw_priv->bh_error = __LINE__;
break;
}
DBG_INT_ADD(rx_total_cnt);
PERF_INFO_STAMP_UPDATE(&rx_start_time2, &sdio_read, alloc_len);
/* Piggyback */
ctrl_reg = __le16_to_cpu(((__le16 *)data)[(alloc_len >> 1) - 1]);
/* check wsm length. */
wsm = (struct wsm_hdr *)data;
wsm_len = __le32_to_cpu(wsm->len);
if (SYS_WARN(wsm_len > read_len)) {
bh_printk(XRADIO_DBG_ERROR, "wsm_id=0x%04x, wsm_len=%zu.\n",
(__le32_to_cpu(wsm->id) & 0xFFF), wsm_len);
hw_priv->bh_error = __LINE__;
break;
}
/* dump rx data. */
#if defined(CONFIG_XRADIO_DEBUG)
if (unlikely(hw_priv->wsm_enable_wsm_dumps)) {
u16 msgid, ifid;
u16 *p = (u16 *) data;
msgid = (*(p + 1)) & WSM_MSG_ID_MASK;
ifid = (*(p + 1)) >> 6;
ifid &= 0xF;
bh_printk(XRADIO_DBG_ALWY,
"[DUMP] msgid 0x%.4X ifid %d len %d\n",
msgid, ifid, *p);
print_hex_dump_bytes("<-- ", DUMP_PREFIX_NONE, data,
min(wsm_len, (size_t)hw_priv->wsm_dump_max_size));
}
#endif /* CONFIG_XRADIO_DEBUG */
/* extract wsm id and seq. */
wsm_id = __le32_to_cpu(wsm->id) & 0xFFF;
wsm_seq = (__le32_to_cpu(wsm->id) >> 13) & 7;
/* for multi-rx indication, there two case.*/
if (ROUND4(wsm_len) < read_len - 2)
skb_trim(skb_rx, read_len - 2);
else
skb_trim(skb_rx, wsm_len);
/* process exceptions. */
if (unlikely(wsm_id == 0x0800)) {
bh_printk(XRADIO_DBG_ERROR, "firmware exception!\n");
wsm_handle_exception(hw_priv, &data[sizeof(*wsm)],
wsm_len - sizeof(*wsm));
hw_priv->bh_error = __LINE__;
break;
} else if (likely(!rx_resync)) {
if (SYS_WARN(wsm_seq != hw_priv->wsm_rx_seq)) {
bh_printk(XRADIO_DBG_ERROR, "wsm_seq=%d.\n", wsm_seq);
hw_priv->bh_error = __LINE__;
break;
}
}
hw_priv->wsm_rx_seq = (wsm_seq + 1) & 7;
rx_resync = 0;
#if (DGB_XRADIO_HWT)
rx_resync = 1; /*0 -> 1, HWT test, should not check this.*/
#endif
/* Process tx frames confirm. */
if (wsm_id & 0x0400) {
int rc = 0;
int if_id = 0;
u32 *cfm = (u32 *)(wsm + 1);
wsm_id &= ~WSM_TX_LINK_ID(WSM_TX_LINK_ID_MAX);
if (wsm_id == 0x041E) {
int cfm_cnt = *cfm;
struct wsm_tx_confirm *tx_cfm =
(struct wsm_tx_confirm *)(cfm + 1);
bh_printk(XRADIO_DBG_NIY, "multi-cfm %d.\n", cfm_cnt);
rc = wsm_release_tx_buffer(hw_priv, cfm_cnt);
do {
if_id = xradio_queue_get_if_id(tx_cfm->packetID);
wsm_release_vif_tx_buffer(hw_priv, if_id, 1);
tx_cfm = (struct wsm_tx_confirm *)((u8 *)tx_cfm +
offsetof(struct wsm_tx_confirm, link_id));
} while (--cfm_cnt);
} else {
rc = wsm_release_tx_buffer(hw_priv, 1);
if (wsm_id == 0x0404) {
if_id = xradio_queue_get_if_id(*cfm);
wsm_release_vif_tx_buffer(hw_priv, if_id, 1);
} else {
#if BH_PROC_RX
flags |= ITEM_F_CMDCFM;
#endif
}
bh_printk(XRADIO_DBG_NIY, "cfm id=0x%04x.\n", wsm_id);
}
if (SYS_WARN(rc < 0)) {
bh_printk(XRADIO_DBG_ERROR, "tx buffer < 0.\n");
hw_priv->bh_error = __LINE__;
break;
} else if (rc > 0) {
tx = 1;
xradio_proc_wakeup(hw_priv);
}
}
/* WSM processing frames. */
#if BH_PROC_RX
if (SYS_WARN(xradio_bh_put(hw_priv, &skb_rx, flags))) {
bh_printk(XRADIO_DBG_ERROR, "xradio_bh_put failed.\n");
hw_priv->bh_error = __LINE__;
break;
}
#else
if (SYS_WARN(wsm_handle_rx(hw_priv, flags, &skb_rx))) {
bh_printk(XRADIO_DBG_ERROR, "wsm_handle_rx failed.\n");
hw_priv->bh_error = __LINE__;
break;
}
/* Reclaim the SKB buffer */
if (skb_rx) {
if (xradio_put_resv_skb(hw_priv, skb_rx, flags))
xradio_put_skb(hw_priv, skb_rx);
skb_rx = NULL;
}
#endif
PERF_INFO_STAMP(&rx_start_time2, &handle_rx, wsm_len);
PERF_INFO_STAMP(&rx_start_time1, &data_rx, wsm_len);
/* Check if rx burst */
read_len = (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK)<<1;
if (!read_len) {
rx = 0;
rx_burst = 0;
goto tx;
} else if (rx_burst) {
xradio_debug_rx_burst(hw_priv);
--rx_burst;
goto rx;
}
} else {
PERF_INFO_STAMP(&bh_start_time, &bh_others, 0);
}
tx:
SYS_BUG(hw_priv->hw_bufs_used > hw_priv->wsm_caps.numInpChBufs);
tx += pending_tx + atomic_xchg(&hw_priv->bh_tx, 0);
#if BH_PROC_TX
tx += atomic_read(&hw_priv->proc.tx_queued);
#endif
pending_tx = 0;
tx_burst = hw_priv->wsm_caps.numInpChBufs - hw_priv->hw_bufs_used;
tx_allowed = tx_burst > 0;
if (tx && tx_allowed) {
int ret;
u8 *data;
size_t tx_len;
#if 0
int num = 0, i;
#endif
PERF_INFO_GETTIME(&tx_start_time1);
/* Wake up the devices */
if (hw_priv->device_can_sleep) {
ret = xradio_device_wakeup(hw_priv);
if (SYS_WARN(ret < 0)) {
hw_priv->bh_error = __LINE__;
break;
} else if (ret == 1) {
hw_priv->device_can_sleep = false;
} else if (ret > 1) {
rx = 1;
ctrl_reg = (ret & HIF_CTRL_NEXT_LEN_MASK);
goto data_proc;
} else { /* Wait for "awake" interrupt */
pending_tx = tx;
continue;
}
}
/* Increase Tx buffer */
wsm_alloc_tx_buffer(hw_priv);
#if (DGB_XRADIO_HWT)
/*hardware test.*/
ret = get_hwt_hif_tx(hw_priv, &data, &tx_len,
&tx_burst, &vif_selected);
if (ret <= 0)
#endif /*DGB_XRADIO_HWT*/
#if BH_PROC_TX
/* Get data to send and send it. */
ret = xradio_bh_get(hw_priv, &data, &tx_len, &tx_burst,
&vif_selected);
#else
/* Get data to send and send it. */
ret = wsm_get_tx(hw_priv, &data, &tx_len, &tx_burst,
&vif_selected);
#endif
if (ret <= 0) {
if (hw_priv->hw_bufs_used >= hw_priv->wsm_caps.numInpChBufs)
++tx_limit_cnt3;
#if BH_PROC_TX
if (list_empty(&hw_priv->proc.bh_tx))
++tx_limit_cnt4;
#endif
wsm_release_tx_buffer(hw_priv, 1);
if (SYS_WARN(ret < 0)) {
bh_printk(XRADIO_DBG_ERROR, "get tx packet=%d.\n", ret);
hw_priv->bh_error = __LINE__;
break;
}
tx = 0;
DBG_INT_ADD(tx_limit);
PERF_INFO_STAMP(&tx_start_time1, &prepare_tx, 0);
} else {
wsm = (struct wsm_hdr *)data;
SYS_BUG(tx_len < sizeof(*wsm));
if (SYS_BUG(__le32_to_cpu(wsm->len) != tx_len)) {
bh_printk(XRADIO_DBG_ERROR, "%s wsmlen=%u, tx_len=%zu.\n",
__func__, __le32_to_cpu(wsm->len), tx_len);
}
/* Continue to send next data if have any. */
atomic_add(1, &hw_priv->bh_tx);
if (tx_len <= 8)
tx_len = 16;
/* Align tx length and check it. */
/* HACK!!! Platform limitation.
* It is also supported by upper layer:
* there is always enough space at the end of the buffer. */
tx_len = hw_priv->sbus_ops->align_size(hw_priv->sbus_priv,
tx_len);
/* Check if not exceeding XRADIO capabilities */
if (tx_len > EFFECTIVE_BUF_SIZE) {
bh_printk(XRADIO_DBG_WARN,
"Write aligned len: %zu\n", tx_len);
} else {
bh_printk(XRADIO_DBG_MSG,
"Tx len=%d, aligned len=%zu\n",
wsm->len, tx_len);
}
/* Make sequence number. */
wsm->id &= __cpu_to_le32(~WSM_TX_SEQ(WSM_TX_SEQ_MAX));
wsm->id |= cpu_to_le32(WSM_TX_SEQ(hw_priv->wsm_tx_seq));
if ((wsm->id & WSM_MSG_ID_MASK) != 0x0004)
hw_priv->wsm_cmd.seq = cpu_to_le32(WSM_TX_SEQ(hw_priv->wsm_tx_seq));
PERF_INFO_STAMP(&tx_start_time1, &prepare_tx, tx_len);
PERF_INFO_GETTIME(&tx_start_time2);
/* Send the data to devices. */
if (SYS_WARN(xradio_data_write(hw_priv, data, tx_len))) {
wsm_release_tx_buffer(hw_priv, 1);
bh_printk(XRADIO_DBG_ERROR, "xradio_data_write failed\n");
hw_priv->bh_error = __LINE__;
break;
}
DBG_INT_ADD(tx_total_cnt);
PERF_INFO_STAMP(&tx_start_time2, &sdio_write, tx_len);
#if defined(CONFIG_XRADIO_DEBUG)
if (unlikely(hw_priv->wsm_enable_wsm_dumps)) {
u16 msgid, ifid;
u16 *p = (u16 *) data;
msgid = (*(p + 1)) & 0x3F;
ifid = (*(p + 1)) >> 6;
ifid &= 0xF;
if (msgid == 0x0006) {
bh_printk(XRADIO_DBG_ALWY,
"[DUMP] >>> msgid 0x%.4X ifid %d" \
"len %d MIB 0x%.4X\n",
msgid, ifid, *p, *(p + 2));
} else {
bh_printk(XRADIO_DBG_ALWY,
"[DUMP] >>> msgid 0x%.4X ifid %d " \
"len %d\n", msgid, ifid, *p);
}
print_hex_dump_bytes("--> ", DUMP_PREFIX_NONE, data,
min(__le32_to_cpu(wsm->len),
hw_priv->wsm_dump_max_size));
}
#endif /* CONFIG_XRADIO_DEBUG */
/* Process after data have sent. */
if (vif_selected != -1) {
hw_priv->hw_bufs_used_vif[vif_selected]++;
}
wsm_txed(hw_priv, data);
hw_priv->wsm_tx_seq = (hw_priv->wsm_tx_seq + 1) & WSM_TX_SEQ_MAX;
PERF_INFO_STAMP(&tx_start_time1, &data_tx, wsm->len);
/* Check for burst. */
#if !BH_PROC_TX
/*if not proc tx, just look to burst limit.*/
tx_burst = 2;
#endif
if (tx_burst > 1 && tx_bursted < tx_burst_limit &&
(hw_priv->wsm_caps.numInpChBufs -
hw_priv->hw_bufs_used) > 1) {
xradio_debug_tx_burst(hw_priv);
if (rx_burst < tx_burst_limit)
++rx_burst;
++tx_bursted;
goto tx;
} else {
if (tx_bursted >= tx_burst_limit)
++tx_limit_cnt5;
if (tx_burst <= 1)
++tx_limit_cnt6;
}
}
} else {
/*no tx or not allow to tx, pending it.*/
pending_tx = tx;
if (!tx)
++tx_limit_cnt1;
if (!tx_allowed)
++tx_limit_cnt2;
}
PERF_INFO_GETTIME(&bh_start_time);
/*Check if there are frames to be rx. */
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
DBG_INT_ADD(next_rx_cnt);
rx = 1;
goto data_proc;
}
/*if no rx, we check tx again.*/
if (tx + atomic_xchg(&hw_priv->bh_tx, 0)) {
if (hw_priv->hw_bufs_used < (hw_priv->wsm_caps.numInpChBufs - 1)) {
tx = 1;
goto data_proc;
} else { /*if no tx buffer, we check rx reg.*/
PERF_INFO_GETTIME(&sdio_reg_time);
atomic_xchg(&hw_priv->bh_rx, 0);
xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
++reg_read;
++sdio_reg_cnt1;
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
DBG_INT_ADD(fix_miss_cnt);
rx = 1;
goto data_proc;
} else {
++sdio_reg_cnt5;
}
}
if (hw_priv->hw_bufs_used < hw_priv->wsm_caps.numInpChBufs) {
tx = 1;
goto data_proc;
}
}
#if 0
/*One more to check rx if reg has not be read. */
if (!reg_read && hw_priv->hw_bufs_used >=
(hw_priv->wsm_caps.numInpChBufs - 1)) {
atomic_xchg(&hw_priv->bh_rx, 0);
PERF_INFO_GETTIME(&sdio_reg_time);
xradio_bh_read_ctrl_reg(hw_priv, &ctrl_reg);
++reg_read;
++sdio_reg_cnt4;
PERF_INFO_STAMP(&sdio_reg_time, &sdio_reg, 4);
if (ctrl_reg & HIF_CTRL_NEXT_LEN_MASK) {
DBG_INT_ADD(fix_miss_cnt);
rx = 1;
goto data_proc;
} else {
++sdio_reg_cnt5;
rx = 0;
}
}
#endif
DBG_INT_ADD(tx_rx_idle);
PERF_INFO_STAMP(&bh_start_time, &bh_others, 0);
#if 0
if (hw_priv->wsm_caps.numInpChBufs - hw_priv->hw_bufs_used > 1 &&
atomic_read(&hw_priv->bh_tx) == 0 && pending_tx == 0 &&
!tx && atomic_read(&hw_priv->tx_lock) == 0) {
int i = 0;
for (i = 0; i < 4; ++i) {
if (hw_priv->tx_queue[i].num_queued - hw_priv->tx_queue[i].num_pending) {
bh_printk(XRADIO_DBG_NIY, "queued=%d, pending=%d, buf=%d.\n",
hw_priv->tx_queue[i].num_queued,
hw_priv->tx_queue[i].num_pending,
hw_priv->wsm_caps.numInpChBufs - hw_priv->hw_bufs_used);
tx = 1;
xradio_proc_wakeup(hw_priv);
goto data_proc;
}
}
}
#endif
} /* for (;;) */
/* Free the SKB buffer when exit. */
if (skb_rx) {
dev_kfree_skb(skb_rx);
skb_rx = NULL;
}
/* If BH Error, handle it. */
if (!term) {
bh_printk(XRADIO_DBG_ERROR, "Fatal error, exitting code=%d.\n",
hw_priv->bh_error);
#ifdef SUPPORT_FW_DBG_INF
xradio_fw_dbg_dump_in_direct_mode(hw_priv);
#endif
#ifdef HW_ERROR_WIFI_RESET
/* notify upper layer to restart wifi.
* don't do it in debug version. */
#ifdef CONFIG_XRADIO_ETF
/* we should restart manually in etf mode.*/
if (!etf_is_connect() &&
XRADIO_BH_RESUMED == atomic_read(&hw_priv->bh_suspend)) {
wsm_upper_restart(hw_priv);
}
#else
if (XRADIO_BH_RESUMED == atomic_read(&hw_priv->bh_suspend))
wsm_upper_restart(hw_priv);
#endif
#endif
/* TODO: schedule_work(recovery) */
#ifndef HAS_PUT_TASK_STRUCT
/* The only reason of having this stupid code here is
* that __put_task_struct is not exported by kernel. */
for (;;) {
#ifdef BH_USE_SEMAPHORE
status = down_timeout(&hw_priv->bh_sem, HZ/10);
term = kthread_should_stop();
status = 0;
#else
int status = wait_event_interruptible(hw_priv->bh_wq, ({
term = kthread_should_stop();
(term); }));
#endif
if (status || term)
break;
}
#endif
}
atomic_add(1, &hw_priv->bh_term); /*debug info, show bh status.*/
return 0;
}
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