/**
* @brief This function handles the major job in WLAN driver.
* it handles the event generated by firmware, rx data received
* from firmware and tx data sent from kernel.
*
* @param data A pointer to wlan_thread structure
* @return WLAN_STATUS_SUCCESS
*/
static int
wlan_service_main_thread(void *data)
{
wlan_thread *thread = data;
wlan_private *priv = thread->priv;
wlan_adapter *Adapter = priv->adapter;
wait_queue_t wait;
u8 ireg = 0;
unsigned long driver_flags;
OS_INTERRUPT_SAVE_AREA;
ENTER();
wlan_activate_thread(thread);
init_waitqueue_entry(&wait, current);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
current->flags |= PF_NOFREEZE;
#endif
wlan_meas_init(priv);
PRINTM(INFO, "11H: init 11H\n");
wlan_11h_init(priv);
wmm_init(priv);
for (;;) {
#define MAX_MAIN_THREAD_LOOPS (10000)
if (++Adapter->main_thread_loops > MAX_MAIN_THREAD_LOOPS) {
panic("main-thread dead loop detected: %u\n"
"IntCnt=%d\n"
"Adapter->HisRegCpy=%#x\n"
"CurCmd=%p CmdPending=%s\n"
"Connect=%s\n"
"cmd_sent=%s\n"
"data_sent=%s\n"
"IsDeepSleep=%d\n"
"PSMode=%d PSState=%d\n"
"WakeupDevReq=%d\n"
"HS_Activated=%d\n"
"WakeupTries=%d\n", Adapter->main_thread_loops,
Adapter->IntCounter,
Adapter->HisRegCpy,
Adapter->CurCmd,
list_empty(&Adapter->CmdPendingQ) ? "N" : "Y",
(Adapter->MediaConnectStatus ==
WlanMediaStateConnected) ? "Y" : "N",
(priv->wlan_dev.cmd_sent) ? "TRUE" : "FALSE",
(priv->wlan_dev.data_sent) ? "TRUE" : "FALSE",
Adapter->IsDeepSleep, Adapter->PSMode, Adapter->PSState,
Adapter->bWakeupDevRequired, Adapter->HS_Activated,
Adapter->WakeupTries);
}
add_wait_queue(&thread->waitQ, &wait);
OS_SET_THREAD_STATE(TASK_INTERRUPTIBLE);
TX_DISABLE;
if ((Adapter->WakeupTries) ||
(Adapter->PSState == PS_STATE_SLEEP
&& !Adapter->bWakeupDevRequired) ||
(!Adapter->IntCounter &&
Adapter->PSState == PS_STATE_PRE_SLEEP) ||
(!Adapter->IntCounter
&& (priv->wlan_dev.data_sent || Adapter->TxLockFlag
|| wmm_lists_empty(priv) || wmm_is_queue_stopped(priv))
&& (priv->wlan_dev.cmd_sent || Adapter->CurCmd ||
list_empty(&Adapter->CmdPendingQ))
)
) {
PRINTM(INFO, "main-thread sleeping... "
"HS_Act=%s WakeupReq=%s Conn=%s PS_Mode=%d PS_State=%d\n",
(Adapter->HS_Activated) ? "Y" : "N",
(Adapter->bWakeupDevRequired) ? "Y" : "N",
(Adapter->MediaConnectStatus) ? "Y" : "N",
Adapter->PSMode, Adapter->PSState);
TX_RESTORE;
Adapter->main_thread_loops = 0;
schedule();
PRINTM(INFO, "main-thread waking up: IntCnt=%d "
"CurCmd=%s CmdPending=%s\n"
" Connect=%s "
"cmd_sent=%s data_sent=%s\n",
Adapter->IntCounter,
(Adapter->CurCmd) ? "Y" : "N",
list_empty(&Adapter->CmdPendingQ) ? "N" : "Y",
(Adapter->MediaConnectStatus) ? "Y" : "N",
(priv->wlan_dev.cmd_sent) ? "TRUE" : "FALSE",
(priv->wlan_dev.data_sent) ? "TRUE" : "FALSE");
} else {
TX_RESTORE;
}
OS_SET_THREAD_STATE(TASK_RUNNING);
remove_wait_queue(&thread->waitQ, &wait);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
if ((thread->state == WLAN_THREAD_STOPPED) || Adapter->SurpriseRemoved)
#else
if (kthread_should_stop() || Adapter->SurpriseRemoved)
#endif
{
PRINTM(INFO, "main-thread: break from main thread: "
"SurpriseRemoved=0x%x\n", Adapter->SurpriseRemoved);
break;
}
if (Adapter->IntCounter) {
OS_INT_DISABLE(priv, driver_flags);
Adapter->IntCounter = 0;
OS_INT_RESTORE(priv, driver_flags);
if (sbi_get_int_status(priv, &ireg)) {
PRINTM(ERROR,
"main-thread: reading HOST_INT_STATUS_REG failed\n");
continue;
}
/* If we have a valid interrupt then we have something to do, so
we are not running in a dead loop */
if (ireg)
Adapter->main_thread_loops = 0;
OS_INT_DISABLE(priv, driver_flags);
Adapter->HisRegCpy |= ireg;
OS_INT_RESTORE(priv, driver_flags);
PRINTM(INTR, "INT: status = 0x%x\n", Adapter->HisRegCpy);
} else if (Adapter->bWakeupDevRequired) {
Adapter->WakeupTries++;
PRINTM(CMND,
"Wakeup device... WakeupReq=%s Conn=%s PS_Mode=%d PS_State=%d @ %lu\n",
(Adapter->bWakeupDevRequired) ? "Y" : "N",
(priv->adapter->MediaConnectStatus) ? "Y" : "N",
priv->adapter->PSMode, priv->adapter->PSState,
os_time_get());
/* Wake up device */
if (sbi_exit_deep_sleep(priv))
PRINTM(MSG, "main-thread: wakeup device failed\n");
continue;
}
/* Command response? */
if (Adapter->HisRegCpy & HIS_CmdUpLdRdy) {
OS_INT_DISABLE(priv, driver_flags);
Adapter->HisRegCpy &= ~HIS_CmdUpLdRdy;
OS_INT_RESTORE(priv, driver_flags);
wlan_process_cmdresp(priv);
}
/* Any Card Event */
if (Adapter->HisRegCpy & HIS_CardEvent) {
OS_INT_DISABLE(priv, driver_flags);
Adapter->HisRegCpy &= ~HIS_CardEvent;
OS_INT_RESTORE(priv, driver_flags);
wlan_process_event(priv);
}
/* Check if we need to confirm Sleep Request received previously */
if (Adapter->PSState == PS_STATE_PRE_SLEEP) {
if (!priv->wlan_dev.cmd_sent && !Adapter->CurCmd) {
ASSERT(Adapter->MediaConnectStatus == WlanMediaStateConnected);
wlan_ps_cond_check(priv, (u16) Adapter->PSMode);
}
}
/* The PS state is changed during processing of Sleep Request event
above */
if ((Adapter->PSState == PS_STATE_SLEEP)
|| (Adapter->PSState == PS_STATE_PRE_SLEEP))
continue;
if (Adapter->IsDeepSleep)
continue;
/* The HS_Activated flag is changed during processing of HS_Activate
command resp */
/* We cannot send command or data if HS_Activated and
WakeupDevRequired are TRUE */
if (Adapter->HS_Activated && Adapter->bWakeupDevRequired) {
PRINTM(INFO, "main-thread: cannot send command or data, "
"HS_Activated=%d\n", Adapter->HS_Activated);
continue;
}
/* Execute the next command */
if (!priv->wlan_dev.cmd_sent && !Adapter->CurCmd)
wlan_exec_next_cmd(priv);
if (!priv->wlan_dev.data_sent
&& !wmm_lists_empty(priv) && !wmm_is_queue_stopped(priv)) {
if ((Adapter->PSState == PS_STATE_FULL_POWER)
|| (Adapter->sleep_period.period == 0)
|| (Adapter->TxLockFlag == FALSE))
wmm_process_tx(priv);
}
}
wlan_deactivate_thread(thread);
LEAVE();
return WLAN_STATUS_SUCCESS;
}
/**
* @brief The main process
*
* @param pmlan_adapter A pointer to mlan_adapter structure
*
* @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
*/
mlan_status
mlan_main_process(IN t_void * pmlan_adapter)
{
mlan_status ret = MLAN_STATUS_SUCCESS;
mlan_adapter *pmadapter = (mlan_adapter *) pmlan_adapter;
pmlan_callbacks pcb;
ENTER();
MASSERT(pmlan_adapter);
pcb = &pmadapter->callbacks;
pcb->moal_spin_lock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
/* Check if already processing */
if (pmadapter->mlan_processing) {
pmadapter->more_task_flag = MTRUE;
pcb->moal_spin_unlock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
goto exit_main_proc;
} else {
pmadapter->mlan_processing = MTRUE;
pcb->moal_spin_unlock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
}
process_start:
do {
pcb->moal_spin_lock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
pmadapter->more_task_flag = MFALSE;
pcb->moal_spin_unlock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
/* Is MLAN shutting down or not ready? */
if ((pmadapter->hw_status == WlanHardwareStatusClosing) ||
(pmadapter->hw_status == WlanHardwareStatusNotReady))
break;
if (util_scalar_read
(pmadapter->pmoal_handle, &pmadapter->rx_pkts_queued,
pmadapter->callbacks.moal_spin_lock,
pmadapter->callbacks.moal_spin_unlock) > HIGH_RX_PENDING) {
PRINTM(MEVENT, "Pause\n");
pmadapter->delay_task_flag = MTRUE;
break;
}
/* Handle pending SDIO interrupts if any */
if (pmadapter->sdio_ireg) {
if (pmadapter->hs_activated == MTRUE)
wlan_process_hs_config(pmadapter);
wlan_process_int_status(pmadapter);
if (pmadapter->data_received && pmadapter->rx_work_flag)
wlan_recv_event(wlan_get_priv
(pmadapter, MLAN_BSS_ROLE_ANY),
MLAN_EVENT_ID_DRV_DEFER_RX_WORK,
MNULL);
}
/* Need to wake up the card ? */
if ((pmadapter->ps_state == PS_STATE_SLEEP) &&
(pmadapter->pm_wakeup_card_req &&
!pmadapter->pm_wakeup_fw_try) &&
(util_peek_list
(pmadapter->pmoal_handle, &pmadapter->cmd_pending_q,
pcb->moal_spin_lock, pcb->moal_spin_unlock)
|| !wlan_bypass_tx_list_empty(pmadapter)
|| !wlan_wmm_lists_empty(pmadapter)
)) {
wlan_pm_wakeup_card(pmadapter);
pmadapter->pm_wakeup_fw_try = MTRUE;
continue;
}
if (IS_CARD_RX_RCVD(pmadapter)) {
pmadapter->data_received = MFALSE;
if (pmadapter->hs_activated == MTRUE) {
pmadapter->is_hs_configured = MFALSE;
wlan_host_sleep_activated_event(wlan_get_priv
(pmadapter,
MLAN_BSS_ROLE_ANY),
MFALSE);
}
pmadapter->pm_wakeup_fw_try = MFALSE;
if (pmadapter->ps_state == PS_STATE_SLEEP)
pmadapter->ps_state = PS_STATE_AWAKE;
} else {
/* We have tried to wakeup the card already */
if (pmadapter->pm_wakeup_fw_try)
break;
if (pmadapter->ps_state != PS_STATE_AWAKE ||
(pmadapter->tx_lock_flag == MTRUE))
break;
if (pmadapter->scan_processing
|| pmadapter->data_sent
|| (wlan_bypass_tx_list_empty(pmadapter) &&
wlan_wmm_lists_empty(pmadapter))
|| wlan_11h_radar_detected_tx_blocked(pmadapter)
) {
if (pmadapter->cmd_sent || pmadapter->curr_cmd
||
(!util_peek_list
(pmadapter->pmoal_handle,
&pmadapter->cmd_pending_q,
pcb->moal_spin_lock,
pcb->moal_spin_unlock))) {
break;
}
}
}
/* Check for Cmd Resp */
if (pmadapter->cmd_resp_received) {
pmadapter->cmd_resp_received = MFALSE;
wlan_process_cmdresp(pmadapter);
/* call moal back when init_fw is done */
if (pmadapter->hw_status == WlanHardwareStatusInitdone) {
pmadapter->hw_status = WlanHardwareStatusReady;
wlan_init_fw_complete(pmadapter);
}
}
/* Check for event */
if (pmadapter->event_received) {
pmadapter->event_received = MFALSE;
wlan_process_event(pmadapter);
}
/* Check if we need to confirm Sleep Request received
previously */
if (pmadapter->ps_state == PS_STATE_PRE_SLEEP) {
if (!pmadapter->cmd_sent && !pmadapter->curr_cmd) {
wlan_check_ps_cond(pmadapter);
}
}
/*
* The ps_state may have been changed during processing of
* Sleep Request event.
*/
if ((pmadapter->ps_state == PS_STATE_SLEEP)
|| (pmadapter->ps_state == PS_STATE_PRE_SLEEP)
|| (pmadapter->ps_state == PS_STATE_SLEEP_CFM)
|| (pmadapter->tx_lock_flag == MTRUE)
)
continue;
if (!pmadapter->cmd_sent && !pmadapter->curr_cmd) {
if (wlan_exec_next_cmd(pmadapter) ==
MLAN_STATUS_FAILURE) {
ret = MLAN_STATUS_FAILURE;
break;
}
}
if (!pmadapter->scan_processing
&& !pmadapter->data_sent &&
!wlan_11h_radar_detected_tx_blocked(pmadapter) &&
!wlan_bypass_tx_list_empty(pmadapter)) {
PRINTM(MINFO, "mlan_send_pkt(): deq(bybass_txq)\n");
wlan_process_bypass_tx(pmadapter);
if (pmadapter->hs_activated == MTRUE) {
pmadapter->is_hs_configured = MFALSE;
wlan_host_sleep_activated_event(wlan_get_priv
(pmadapter,
MLAN_BSS_ROLE_ANY),
MFALSE);
}
}
if (!pmadapter->scan_processing
&& !pmadapter->data_sent && !wlan_wmm_lists_empty(pmadapter)
&& !wlan_11h_radar_detected_tx_blocked(pmadapter)
) {
wlan_wmm_process_tx(pmadapter);
if (pmadapter->hs_activated == MTRUE) {
pmadapter->is_hs_configured = MFALSE;
wlan_host_sleep_activated_event(wlan_get_priv
(pmadapter,
MLAN_BSS_ROLE_ANY),
MFALSE);
}
}
#ifdef STA_SUPPORT
if (pmadapter->delay_null_pkt && !pmadapter->cmd_sent &&
!pmadapter->curr_cmd && !IS_COMMAND_PENDING(pmadapter) &&
wlan_bypass_tx_list_empty(pmadapter) &&
wlan_wmm_lists_empty(pmadapter)) {
if (wlan_send_null_packet
(wlan_get_priv(pmadapter, MLAN_BSS_ROLE_STA),
MRVDRV_TxPD_POWER_MGMT_NULL_PACKET |
MRVDRV_TxPD_POWER_MGMT_LAST_PACKET)
== MLAN_STATUS_SUCCESS) {
pmadapter->delay_null_pkt = MFALSE;
}
break;
}
#endif
} while (MTRUE);
pcb->moal_spin_lock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
if (pmadapter->more_task_flag == MTRUE) {
pcb->moal_spin_unlock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
goto process_start;
}
pmadapter->mlan_processing = MFALSE;
pcb->moal_spin_unlock(pmadapter->pmoal_handle,
pmadapter->pmain_proc_lock);
exit_main_proc:
if (pmadapter->hw_status == WlanHardwareStatusClosing)
mlan_shutdown_fw(pmadapter);
LEAVE();
return ret;
}