/*
* This function adds the card.
*
* This function follows the following major steps to set up the device -
* - Initialize software. This includes probing the card, registering
* the interface operations table, and allocating/initializing the
* adapter structure
* - Set up the netlink socket
* - Create and start the main work queue
* - Register the device
* - Initialize firmware and hardware
* - Add logical interfaces
*/
int
mwifiex_add_card(void *card, struct semaphore *sem,
struct mwifiex_if_ops *if_ops, u8 iface_type)
{
struct mwifiex_adapter *adapter;
if (down_interruptible(sem))
goto exit_sem_err;
if (mwifiex_register(card, if_ops, (void **)&adapter)) {
pr_err("%s: software init failed\n", __func__);
goto err_init_sw;
}
adapter->iface_type = iface_type;
adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
adapter->surprise_removed = false;
init_waitqueue_head(&adapter->init_wait_q);
adapter->is_suspended = false;
adapter->hs_activated = false;
init_waitqueue_head(&adapter->hs_activate_wait_q);
adapter->cmd_wait_q_required = false;
init_waitqueue_head(&adapter->cmd_wait_q.wait);
adapter->cmd_wait_q.status = 0;
adapter->scan_wait_q_woken = false;
adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE");
if (!adapter->workqueue)
goto err_kmalloc;
INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
/* Register the device. Fill up the private data structure with relevant
information from the card and request for the required IRQ. */
if (adapter->if_ops.register_dev(adapter)) {
pr_err("%s: failed to register mwifiex device\n", __func__);
goto err_registerdev;
}
if (mwifiex_init_hw_fw(adapter)) {
pr_err("%s: firmware init failed\n", __func__);
goto err_init_fw;
}
up(sem);
return 0;
err_init_fw:
pr_debug("info: %s: unregister device\n", __func__);
if (adapter->if_ops.unregister_dev)
adapter->if_ops.unregister_dev(adapter);
err_registerdev:
adapter->surprise_removed = true;
mwifiex_terminate_workqueue(adapter);
err_kmalloc:
if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
(adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
pr_debug("info: %s: shutdown mwifiex\n", __func__);
adapter->init_wait_q_woken = false;
if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
wait_event_interruptible(adapter->init_wait_q,
adapter->init_wait_q_woken);
}
mwifiex_free_adapter(adapter);
err_init_sw:
up(sem);
exit_sem_err:
return -1;
}
/*
* This function removes the card.
*
* This function follows the following major steps to remove the device -
* - Stop data traffic
* - Shutdown firmware
* - Remove the logical interfaces
* - Terminate the work queue
* - Unregister the device
* - Free the adapter structure
*/
int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
{
struct mwifiex_private *priv = NULL;
int i;
if (down_interruptible(sem))
goto exit_sem_err;
if (!adapter)
goto exit_remove;
adapter->surprise_removed = true;
/* Stop data */
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (priv && priv->netdev) {
mwifiex_stop_net_dev_queue(priv->netdev, adapter);
if (netif_carrier_ok(priv->netdev))
netif_carrier_off(priv->netdev);
}
}
dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
adapter->init_wait_q_woken = false;
if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
wait_event_interruptible(adapter->init_wait_q,
adapter->init_wait_q_woken);
dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
if (atomic_read(&adapter->rx_pending) ||
atomic_read(&adapter->tx_pending) ||
atomic_read(&adapter->cmd_pending)) {
dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
"cmd_pending=%d\n",
atomic_read(&adapter->rx_pending),
atomic_read(&adapter->tx_pending),
atomic_read(&adapter->cmd_pending));
}
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (!priv)
continue;
rtnl_lock();
if (priv->wdev && priv->netdev)
mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
rtnl_unlock();
}
priv = adapter->priv[0];
if (!priv || !priv->wdev)
goto exit_remove;
wiphy_unregister(priv->wdev->wiphy);
wiphy_free(priv->wdev->wiphy);
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (priv)
kfree(priv->wdev);
}
mwifiex_terminate_workqueue(adapter);
/* Unregister device */
dev_dbg(adapter->dev, "info: unregister device\n");
if (adapter->if_ops.unregister_dev)
adapter->if_ops.unregister_dev(adapter);
/* Free adapter structure */
dev_dbg(adapter->dev, "info: free adapter\n");
mwifiex_free_adapter(adapter);
exit_remove:
up(sem);
exit_sem_err:
return 0;
}
/*
* The main process.
*
* This function is the main procedure of the driver and handles various driver
* operations. It runs in a loop and provides the core functionalities.
*
* The main responsibilities of this function are -
* - Ensure concurrency control
* - Handle pending interrupts and call interrupt handlers
* - Wake up the card if required
* - Handle command responses and call response handlers
* - Handle events and call event handlers
* - Execute pending commands
* - Transmit pending data packets
*/
int mwifiex_main_process(struct mwifiex_adapter *adapter)
{
int ret = 0;
unsigned long flags;
struct sk_buff *skb;
spin_lock_irqsave(&adapter->main_proc_lock, flags);
/* Check if already processing */
if (adapter->mwifiex_processing) {
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
goto exit_main_proc;
} else {
adapter->mwifiex_processing = true;
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
}
process_start:
do {
if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
(adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
break;
/* Handle pending interrupt if any */
if (adapter->int_status) {
if (adapter->hs_activated)
mwifiex_process_hs_config(adapter);
if (adapter->if_ops.process_int_status)
adapter->if_ops.process_int_status(adapter);
}
/* Need to wake up the card ? */
if ((adapter->ps_state == PS_STATE_SLEEP) &&
(adapter->pm_wakeup_card_req &&
!adapter->pm_wakeup_fw_try) &&
(is_command_pending(adapter) ||
!mwifiex_wmm_lists_empty(adapter))) {
adapter->pm_wakeup_fw_try = true;
adapter->if_ops.wakeup(adapter);
continue;
}
if (IS_CARD_RX_RCVD(adapter)) {
adapter->pm_wakeup_fw_try = false;
if (adapter->ps_state == PS_STATE_SLEEP)
adapter->ps_state = PS_STATE_AWAKE;
} else {
/* We have tried to wakeup the card already */
if (adapter->pm_wakeup_fw_try)
break;
if (adapter->ps_state != PS_STATE_AWAKE ||
adapter->tx_lock_flag)
break;
if ((adapter->scan_processing &&
!adapter->scan_delay_cnt) || adapter->data_sent ||
mwifiex_wmm_lists_empty(adapter)) {
if (adapter->cmd_sent || adapter->curr_cmd ||
(!is_command_pending(adapter)))
break;
}
}
/* Check Rx data for USB */
if (adapter->iface_type == MWIFIEX_USB)
while ((skb = skb_dequeue(&adapter->usb_rx_data_q)))
mwifiex_handle_rx_packet(adapter, skb);
/* Check for Cmd Resp */
if (adapter->cmd_resp_received) {
adapter->cmd_resp_received = false;
mwifiex_process_cmdresp(adapter);
/* call mwifiex back when init_fw is done */
if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
adapter->hw_status = MWIFIEX_HW_STATUS_READY;
mwifiex_init_fw_complete(adapter);
}
}
/* Check for event */
if (adapter->event_received) {
adapter->event_received = false;
mwifiex_process_event(adapter);
}
/* Check if we need to confirm Sleep Request
received previously */
if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
if (!adapter->cmd_sent && !adapter->curr_cmd)
mwifiex_check_ps_cond(adapter);
}
/* * The ps_state may have been changed during processing of
* Sleep Request event.
*/
if ((adapter->ps_state == PS_STATE_SLEEP) ||
(adapter->ps_state == PS_STATE_PRE_SLEEP) ||
(adapter->ps_state == PS_STATE_SLEEP_CFM) ||
adapter->tx_lock_flag)
continue;
if (!adapter->cmd_sent && !adapter->curr_cmd) {
if (mwifiex_exec_next_cmd(adapter) == -1) {
ret = -1;
break;
}
}
if ((!adapter->scan_processing || adapter->scan_delay_cnt) &&
!adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
mwifiex_wmm_process_tx(adapter);
if (adapter->hs_activated) {
adapter->is_hs_configured = false;
mwifiex_hs_activated_event
(mwifiex_get_priv
(adapter, MWIFIEX_BSS_ROLE_ANY),
false);
}
}
if (adapter->delay_null_pkt && !adapter->cmd_sent &&
!adapter->curr_cmd && !is_command_pending(adapter) &&
mwifiex_wmm_lists_empty(adapter)) {
if (!mwifiex_send_null_packet
(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
adapter->delay_null_pkt = false;
adapter->ps_state = PS_STATE_SLEEP;
}
break;
}
} while (true);
if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter))
goto process_start;
spin_lock_irqsave(&adapter->main_proc_lock, flags);
adapter->mwifiex_processing = false;
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
exit_main_proc:
if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
mwifiex_shutdown_drv(adapter);
return ret;
}
/*
* This function adds the card.
*
* This function follows the following major steps to set up the device -
* - Initialize software. This includes probing the card, registering
* the interface operations table, and allocating/initializing the
* adapter structure
* - Set up the netlink socket
* - Create and start the main work queue
* - Register the device
* - Initialize firmware and hardware
* - Add logical interfaces
*/
int
mwifiex_add_card(void *card, struct semaphore *sem,
struct mwifiex_if_ops *if_ops, u8 iface_type)
{
struct mwifiex_adapter *adapter;
if (down_interruptible(sem))
goto exit_sem_err;
if (mwifiex_register(card, if_ops, (void **)&adapter)) {
pr_err("%s: software init failed\n", __func__);
goto err_init_sw;
}
adapter->iface_type = iface_type;
adapter->card_sem = sem;
adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
adapter->surprise_removed = false;
init_waitqueue_head(&adapter->init_wait_q);
adapter->is_suspended = false;
adapter->hs_activated = false;
init_waitqueue_head(&adapter->hs_activate_wait_q);
init_waitqueue_head(&adapter->cmd_wait_q.wait);
adapter->cmd_wait_q.status = 0;
adapter->scan_wait_q_woken = false;
if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
adapter->rx_work_enabled = true;
pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
}
adapter->workqueue =
alloc_workqueue("MWIFIEX_WORK_QUEUE",
WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
if (!adapter->workqueue)
goto err_kmalloc;
INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
if (adapter->rx_work_enabled) {
adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
WQ_HIGHPRI |
WQ_MEM_RECLAIM |
WQ_UNBOUND, 1);
if (!adapter->rx_workqueue)
goto err_kmalloc;
INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
}
if (adapter->if_ops.iface_work)
INIT_WORK(&adapter->iface_work, adapter->if_ops.iface_work);
/* Register the device. Fill up the private data structure with relevant
information from the card. */
if (adapter->if_ops.register_dev(adapter)) {
pr_err("%s: failed to register mwifiex device\n", __func__);
goto err_registerdev;
}
if (mwifiex_init_hw_fw(adapter)) {
pr_err("%s: firmware init failed\n", __func__);
goto err_init_fw;
}
return 0;
err_init_fw:
pr_debug("info: %s: unregister device\n", __func__);
if (adapter->if_ops.unregister_dev)
adapter->if_ops.unregister_dev(adapter);
if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
(adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
pr_debug("info: %s: shutdown mwifiex\n", __func__);
adapter->init_wait_q_woken = false;
if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
wait_event_interruptible(adapter->init_wait_q,
adapter->init_wait_q_woken);
}
err_registerdev:
adapter->surprise_removed = true;
mwifiex_terminate_workqueue(adapter);
err_kmalloc:
mwifiex_free_adapter(adapter);
err_init_sw:
up(sem);
exit_sem_err:
return -1;
}
/*
* This function gets firmware and initializes it.
*
* The main initialization steps followed are -
* - Download the correct firmware to card
* - Issue the init commands to firmware
*/
static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
{
int ret;
char fmt[64];
struct mwifiex_private *priv;
struct mwifiex_adapter *adapter = context;
struct mwifiex_fw_image fw;
struct semaphore *sem = adapter->card_sem;
bool init_failed = false;
struct wireless_dev *wdev;
if (!firmware) {
dev_err(adapter->dev,
"Failed to get firmware %s\n", adapter->fw_name);
goto err_dnld_fw;
}
memset(&fw, 0, sizeof(struct mwifiex_fw_image));
adapter->firmware = firmware;
fw.fw_buf = (u8 *) adapter->firmware->data;
fw.fw_len = adapter->firmware->size;
if (adapter->if_ops.dnld_fw)
ret = adapter->if_ops.dnld_fw(adapter, &fw);
else
ret = mwifiex_dnld_fw(adapter, &fw);
if (ret == -1)
goto err_dnld_fw;
dev_notice(adapter->dev, "WLAN FW is active\n");
if (cal_data_cfg) {
if ((request_firmware(&adapter->cal_data, cal_data_cfg,
adapter->dev)) < 0)
dev_err(adapter->dev,
"Cal data request_firmware() failed\n");
}
/* enable host interrupt after fw dnld is successful */
if (adapter->if_ops.enable_int) {
if (adapter->if_ops.enable_int(adapter))
goto err_dnld_fw;
}
adapter->init_wait_q_woken = false;
ret = mwifiex_init_fw(adapter);
if (ret == -1) {
goto err_init_fw;
} else if (!ret) {
adapter->hw_status = MWIFIEX_HW_STATUS_READY;
goto done;
}
/* Wait for mwifiex_init to complete */
wait_event_interruptible(adapter->init_wait_q,
adapter->init_wait_q_woken);
if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
goto err_init_fw;
priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
if (mwifiex_register_cfg80211(adapter)) {
dev_err(adapter->dev, "cannot register with cfg80211\n");
goto err_init_fw;
}
if (mwifiex_init_channel_scan_gap(adapter)) {
dev_err(adapter->dev, "could not init channel stats table\n");
goto err_init_fw;
}
if (driver_mode) {
driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
driver_mode |= MWIFIEX_DRIVER_MODE_STA;
}
rtnl_lock();
/* Create station interface by default */
wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
NL80211_IFTYPE_STATION, NULL, NULL);
if (IS_ERR(wdev)) {
dev_err(adapter->dev, "cannot create default STA interface\n");
rtnl_unlock();
goto err_add_intf;
}
if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d",
NL80211_IFTYPE_AP, NULL, NULL);
if (IS_ERR(wdev)) {
dev_err(adapter->dev, "cannot create AP interface\n");
rtnl_unlock();
goto err_add_intf;
}
}
if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d",
NL80211_IFTYPE_P2P_CLIENT, NULL,
NULL);
if (IS_ERR(wdev)) {
dev_err(adapter->dev,
"cannot create p2p client interface\n");
rtnl_unlock();
goto err_add_intf;
}
}
rtnl_unlock();
mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
dev_notice(adapter->dev, "driver_version = %s\n", fmt);
goto done;
err_add_intf:
wiphy_unregister(adapter->wiphy);
wiphy_free(adapter->wiphy);
err_init_fw:
if (adapter->if_ops.disable_int)
adapter->if_ops.disable_int(adapter);
err_dnld_fw:
pr_debug("info: %s: unregister device\n", __func__);
if (adapter->if_ops.unregister_dev)
adapter->if_ops.unregister_dev(adapter);
if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
(adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
pr_debug("info: %s: shutdown mwifiex\n", __func__);
adapter->init_wait_q_woken = false;
if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
wait_event_interruptible(adapter->init_wait_q,
adapter->init_wait_q_woken);
}
adapter->surprise_removed = true;
mwifiex_terminate_workqueue(adapter);
init_failed = true;
done:
if (adapter->cal_data) {
release_firmware(adapter->cal_data);
adapter->cal_data = NULL;
}
if (adapter->firmware) {
release_firmware(adapter->firmware);
adapter->firmware = NULL;
}
if (init_failed)
mwifiex_free_adapter(adapter);
up(sem);
return;
}
/*
* The main process.
*
* This function is the main procedure of the driver and handles various driver
* operations. It runs in a loop and provides the core functionalities.
*
* The main responsibilities of this function are -
* - Ensure concurrency control
* - Handle pending interrupts and call interrupt handlers
* - Wake up the card if required
* - Handle command responses and call response handlers
* - Handle events and call event handlers
* - Execute pending commands
* - Transmit pending data packets
*/
int mwifiex_main_process(struct mwifiex_adapter *adapter)
{
int ret = 0;
unsigned long flags;
spin_lock_irqsave(&adapter->main_proc_lock, flags);
/* Check if already processing */
if (adapter->mwifiex_processing) {
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
goto exit_main_proc;
} else {
adapter->mwifiex_processing = true;
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
}
process_start:
do {
if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
(adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
break;
/* For non-USB interfaces, If we process interrupts first, it
* would increase RX pending even further. Avoid this by
* checking if rx_pending has crossed high threshold and
* schedule rx work queue and then process interrupts.
* For USB interface, there are no interrupts. We already have
* HIGH_RX_PENDING check in usb.c
*/
if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
adapter->iface_type != MWIFIEX_USB) {
adapter->delay_main_work = true;
if (!adapter->rx_processing)
queue_work(adapter->rx_workqueue,
&adapter->rx_work);
break;
}
/* Handle pending interrupt if any */
if (adapter->int_status) {
if (adapter->hs_activated)
mwifiex_process_hs_config(adapter);
if (adapter->if_ops.process_int_status)
adapter->if_ops.process_int_status(adapter);
}
if (adapter->rx_work_enabled && adapter->data_received)
queue_work(adapter->rx_workqueue, &adapter->rx_work);
/* Need to wake up the card ? */
if ((adapter->ps_state == PS_STATE_SLEEP) &&
(adapter->pm_wakeup_card_req &&
!adapter->pm_wakeup_fw_try) &&
(is_command_pending(adapter) ||
!mwifiex_wmm_lists_empty(adapter))) {
adapter->pm_wakeup_fw_try = true;
adapter->if_ops.wakeup(adapter);
continue;
}
if (IS_CARD_RX_RCVD(adapter)) {
adapter->data_received = false;
adapter->pm_wakeup_fw_try = false;
if (adapter->ps_state == PS_STATE_SLEEP)
adapter->ps_state = PS_STATE_AWAKE;
} else {
/* We have tried to wakeup the card already */
if (adapter->pm_wakeup_fw_try)
break;
if (adapter->ps_state != PS_STATE_AWAKE ||
adapter->tx_lock_flag)
break;
if ((!adapter->scan_chan_gap_enabled &&
adapter->scan_processing) || adapter->data_sent ||
mwifiex_wmm_lists_empty(adapter)) {
if (adapter->cmd_sent || adapter->curr_cmd ||
(!is_command_pending(adapter)))
break;
}
}
/* Check for event */
if (adapter->event_received) {
adapter->event_received = false;
mwifiex_process_event(adapter);
}
/* Check for Cmd Resp */
if (adapter->cmd_resp_received) {
adapter->cmd_resp_received = false;
mwifiex_process_cmdresp(adapter);
/* call mwifiex back when init_fw is done */
if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
adapter->hw_status = MWIFIEX_HW_STATUS_READY;
mwifiex_init_fw_complete(adapter);
}
}
/* Check if we need to confirm Sleep Request
received previously */
if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
if (!adapter->cmd_sent && !adapter->curr_cmd)
mwifiex_check_ps_cond(adapter);
}
/* * The ps_state may have been changed during processing of
* Sleep Request event.
*/
if ((adapter->ps_state == PS_STATE_SLEEP) ||
(adapter->ps_state == PS_STATE_PRE_SLEEP) ||
(adapter->ps_state == PS_STATE_SLEEP_CFM) ||
adapter->tx_lock_flag)
continue;
if (!adapter->cmd_sent && !adapter->curr_cmd) {
if (mwifiex_exec_next_cmd(adapter) == -1) {
ret = -1;
break;
}
}
if ((adapter->scan_chan_gap_enabled ||
!adapter->scan_processing) &&
!adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
mwifiex_wmm_process_tx(adapter);
if (adapter->hs_activated) {
adapter->is_hs_configured = false;
mwifiex_hs_activated_event
(mwifiex_get_priv
(adapter, MWIFIEX_BSS_ROLE_ANY),
false);
}
}
if (adapter->delay_null_pkt && !adapter->cmd_sent &&
!adapter->curr_cmd && !is_command_pending(adapter) &&
mwifiex_wmm_lists_empty(adapter)) {
if (!mwifiex_send_null_packet
(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
adapter->delay_null_pkt = false;
adapter->ps_state = PS_STATE_SLEEP;
}
break;
}
} while (true);
spin_lock_irqsave(&adapter->main_proc_lock, flags);
if (!adapter->delay_main_work &&
(adapter->int_status || IS_CARD_RX_RCVD(adapter))) {
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
goto process_start;
}
adapter->mwifiex_processing = false;
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
exit_main_proc:
if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
mwifiex_shutdown_drv(adapter);
return ret;
}
/*
* This function removes the card.
*
* This function follows the following major steps to remove the device -
* - Stop data traffic
* - Shutdown firmware
* - Remove the logical interfaces
* - Terminate the work queue
* - Unregister the device
* - Free the adapter structure
*/
int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
{
struct mwifiex_private *priv = NULL;
int i;
if (down_trylock(sem))
goto exit_sem_err;
if (!adapter)
goto exit_remove;
/* We can no longer handle interrupts once we start doing the teardown
* below. */
if (adapter->if_ops.disable_int)
adapter->if_ops.disable_int(adapter);
adapter->surprise_removed = true;
mwifiex_terminate_workqueue(adapter);
/* Stop data */
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (priv && priv->netdev) {
mwifiex_stop_net_dev_queue(priv->netdev, adapter);
if (netif_carrier_ok(priv->netdev))
netif_carrier_off(priv->netdev);
}
}
mwifiex_dbg(adapter, CMD,
"cmd: calling mwifiex_shutdown_drv...\n");
adapter->init_wait_q_woken = false;
if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
wait_event_interruptible(adapter->init_wait_q,
adapter->init_wait_q_woken);
mwifiex_dbg(adapter, CMD,
"cmd: mwifiex_shutdown_drv done\n");
if (atomic_read(&adapter->rx_pending) ||
atomic_read(&adapter->tx_pending) ||
atomic_read(&adapter->cmd_pending)) {
mwifiex_dbg(adapter, ERROR,
"rx_pending=%d, tx_pending=%d,\t"
"cmd_pending=%d\n",
atomic_read(&adapter->rx_pending),
atomic_read(&adapter->tx_pending),
atomic_read(&adapter->cmd_pending));
}
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (!priv)
continue;
rtnl_lock();
if (priv->netdev &&
priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
rtnl_unlock();
}
wiphy_unregister(adapter->wiphy);
wiphy_free(adapter->wiphy);
/* Unregister device */
mwifiex_dbg(adapter, INFO,
"info: unregister device\n");
if (adapter->if_ops.unregister_dev)
adapter->if_ops.unregister_dev(adapter);
/* Free adapter structure */
mwifiex_dbg(adapter, INFO,
"info: free adapter\n");
mwifiex_free_adapter(adapter);
exit_remove:
up(sem);
exit_sem_err:
return 0;
}
