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linux/drivers/net/wireless/mwifiex/main.c

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/*
* Marvell Wireless LAN device driver: major functions
*
* Copyright (C) 2011, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "main.h"
#include "wmm.h"
#include "cfg80211.h"
#include "11n.h"
#define VERSION "1.0"
const char driver_version[] = "mwifiex " VERSION " (%s) ";
static char *cal_data_cfg;
module_param(cal_data_cfg, charp, 0);
static void scan_delay_timer_fn(unsigned long data)
{
struct mwifiex_private *priv = (struct mwifiex_private *)data;
struct mwifiex_adapter *adapter = priv->adapter;
struct cmd_ctrl_node *cmd_node, *tmp_node;
unsigned long flags;
if (adapter->surprise_removed)
return;
if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
/*
* Abort scan operation by cancelling all pending scan
* commands
*/
spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
list_for_each_entry_safe(cmd_node, tmp_node,
&adapter->scan_pending_q, list) {
list_del(&cmd_node->list);
mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
}
spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
adapter->scan_processing = false;
adapter->scan_delay_cnt = 0;
adapter->empty_tx_q_cnt = 0;
spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
if (priv->scan_request) {
dev_dbg(adapter->dev, "info: aborting scan\n");
cfg80211_scan_done(priv->scan_request, 1);
priv->scan_request = NULL;
} else {
priv->scan_aborting = false;
dev_dbg(adapter->dev, "info: scan already aborted\n");
}
goto done;
}
if (!atomic_read(&priv->adapter->is_tx_received)) {
adapter->empty_tx_q_cnt++;
if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
/*
* No Tx traffic for 200msec. Get scan command from
* scan pending queue and put to cmd pending queue to
* resume scan operation
*/
adapter->scan_delay_cnt = 0;
adapter->empty_tx_q_cnt = 0;
spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
cmd_node = list_first_entry(&adapter->scan_pending_q,
struct cmd_ctrl_node, list);
list_del(&cmd_node->list);
spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
flags);
mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
true);
queue_work(adapter->workqueue, &adapter->main_work);
goto done;
}
} else {
adapter->empty_tx_q_cnt = 0;
}
/* Delay scan operation further by 20msec */
mod_timer(&priv->scan_delay_timer, jiffies +
msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
adapter->scan_delay_cnt++;
done:
if (atomic_read(&priv->adapter->is_tx_received))
atomic_set(&priv->adapter->is_tx_received, false);
return;
}
/*
* This function registers the device and performs all the necessary
* initializations.
*
* The following initialization operations are performed -
* - Allocate adapter structure
* - Save interface specific operations table in adapter
* - Call interface specific initialization routine
* - Allocate private structures
* - Set default adapter structure parameters
* - Initialize locks
*
* In case of any errors during inittialization, this function also ensures
* proper cleanup before exiting.
*/
static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
void **padapter)
{
struct mwifiex_adapter *adapter;
int i;
adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
if (!adapter)
return -ENOMEM;
*padapter = adapter;
adapter->card = card;
/* Save interface specific operations in adapter */
memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
/* card specific initialization has been deferred until now .. */
if (adapter->if_ops.init_if)
if (adapter->if_ops.init_if(adapter))
goto error;
adapter->priv_num = 0;
for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
/* Allocate memory for private structure */
adapter->priv[i] =
kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
if (!adapter->priv[i])
goto error;
adapter->priv[i]->adapter = adapter;
adapter->priv_num++;
setup_timer(&adapter->priv[i]->scan_delay_timer,
scan_delay_timer_fn,
(unsigned long)adapter->priv[i]);
}
mwifiex_init_lock_list(adapter);
init_timer(&adapter->cmd_timer);
adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
adapter->cmd_timer.data = (unsigned long) adapter;
return 0;
error:
dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
for (i = 0; i < adapter->priv_num; i++)
kfree(adapter->priv[i]);
kfree(adapter);
return -1;
}
/*
* This function unregisters the device and performs all the necessary
* cleanups.
*
* The following cleanup operations are performed -
* - Free the timers
* - Free beacon buffers
* - Free private structures
* - Free adapter structure
*/
static int mwifiex_unregister(struct mwifiex_adapter *adapter)
{
s32 i;
if (adapter->if_ops.cleanup_if)
adapter->if_ops.cleanup_if(adapter);
del_timer(&adapter->cmd_timer);
/* Free private structures */
for (i = 0; i < adapter->priv_num; i++) {
if (adapter->priv[i]) {
mwifiex_free_curr_bcn(adapter->priv[i]);
del_timer_sync(&adapter->priv[i]->scan_delay_timer);
kfree(adapter->priv[i]);
}
}
kfree(adapter);
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);
spin_lock_irqsave(&adapter->main_proc_lock, flags);
if ((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;
}
EXPORT_SYMBOL_GPL(mwifiex_main_process);
/*
* This function frees the adapter structure.
*
* Additionally, this closes the netlink socket, frees the timers
* and private structures.
*/
static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
{
if (!adapter) {
pr_err("%s: adapter is NULL\n", __func__);
return;
}
mwifiex_unregister(adapter);
pr_debug("info: %s: free adapter\n", __func__);
}
/*
* This function cancels all works in the queue and destroys
* the main workqueue.
*/
static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
{
flush_workqueue(adapter->workqueue);
destroy_workqueue(adapter->workqueue);
adapter->workqueue = NULL;
}
/*
* 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;
}
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;
}
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;
}
complete(&adapter->fw_load);
if (init_failed)
mwifiex_free_adapter(adapter);
up(sem);
return;
}
/*
* This function initializes the hardware and gets firmware.
*/
static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
{
int ret;
init_completion(&adapter->fw_load);
ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
adapter->dev, GFP_KERNEL, adapter,
mwifiex_fw_dpc);
if (ret < 0)
dev_err(adapter->dev,
"request_firmware_nowait() returned error %d\n", ret);
return ret;
}
/*
* CFG802.11 network device handler for open.
*
* Starts the data queue.
*/
static int
mwifiex_open(struct net_device *dev)
{
netif_tx_start_all_queues(dev);
return 0;
}
/*
* CFG802.11 network device handler for close.
*/
static int
mwifiex_close(struct net_device *dev)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
if (priv->scan_request) {
dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n");
cfg80211_scan_done(priv->scan_request, 1);
priv->scan_request = NULL;
priv->scan_aborting = true;
}
return 0;
}
/*
* Add buffer into wmm tx queue and queue work to transmit it.
*/
int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
{
struct netdev_queue *txq;
int index = mwifiex_1d_to_wmm_queue[skb->priority];
if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
txq = netdev_get_tx_queue(priv->netdev, index);
if (!netif_tx_queue_stopped(txq)) {
netif_tx_stop_queue(txq);
dev_dbg(priv->adapter->dev, "stop queue: %d\n", index);
}
}
atomic_inc(&priv->adapter->tx_pending);
mwifiex_wmm_add_buf_txqueue(priv, skb);
if (priv->adapter->scan_delay_cnt)
atomic_set(&priv->adapter->is_tx_received, true);
queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
return 0;
}
/*
* CFG802.11 network device handler for data transmission.
*/
static int
mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
struct sk_buff *new_skb;
struct mwifiex_txinfo *tx_info;
struct timeval tv;
dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
jiffies, priv->bss_type, priv->bss_num);
if (priv->adapter->surprise_removed) {
kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
dev_dbg(priv->adapter->dev,
"data: Tx: insufficient skb headroom %d\n",
skb_headroom(skb));
/* Insufficient skb headroom - allocate a new skb */
new_skb =
skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
if (unlikely(!new_skb)) {
dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
kfree_skb(skb);
skb = new_skb;
dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
skb_headroom(skb));
}
tx_info = MWIFIEX_SKB_TXCB(skb);
tx_info->bss_num = priv->bss_num;
tx_info->bss_type = priv->bss_type;
tx_info->pkt_len = skb->len;
/* Record the current time the packet was queued; used to
* determine the amount of time the packet was queued in
* the driver before it was sent to the firmware.
* The delay is then sent along with the packet to the
* firmware for aggregate delay calculation for stats and
* MSDU lifetime expiry.
*/
do_gettimeofday(&tv);
skb->tstamp = timeval_to_ktime(tv);
mwifiex_queue_tx_pkt(priv, skb);
return 0;
}
/*
* CFG802.11 network device handler for setting MAC address.
*/
static int
mwifiex_set_mac_address(struct net_device *dev, void *addr)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
struct sockaddr *hw_addr = addr;
int ret;
memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
/* Send request to firmware */
ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
HostCmd_ACT_GEN_SET, 0, NULL);
if (!ret)
memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
else
dev_err(priv->adapter->dev,
"set mac address failed: ret=%d\n", ret);
memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
return ret;
}
/*
* CFG802.11 network device handler for setting multicast list.
*/
static void mwifiex_set_multicast_list(struct net_device *dev)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
struct mwifiex_multicast_list mcast_list;
if (dev->flags & IFF_PROMISC) {
mcast_list.mode = MWIFIEX_PROMISC_MODE;
} else if (dev->flags & IFF_ALLMULTI ||
netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
} else {
mcast_list.mode = MWIFIEX_MULTICAST_MODE;
mcast_list.num_multicast_addr =
mwifiex_copy_mcast_addr(&mcast_list, dev);
}
mwifiex_request_set_multicast_list(priv, &mcast_list);
}
/*
* CFG802.11 network device handler for transmission timeout.
*/
static void
mwifiex_tx_timeout(struct net_device *dev)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
priv->num_tx_timeout++;
priv->tx_timeout_cnt++;
dev_err(priv->adapter->dev,
"%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num);
mwifiex_set_trans_start(dev);
if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
priv->adapter->if_ops.card_reset) {
dev_err(priv->adapter->dev,
"tx_timeout_cnt exceeds threshold. Triggering card reset!\n");
priv->adapter->if_ops.card_reset(priv->adapter);
}
}
/*
* CFG802.11 network device handler for statistics retrieval.
*/
static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
return &priv->stats;
}
static u16
mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv)
{
skb->priority = cfg80211_classify8021d(skb, NULL);
return mwifiex_1d_to_wmm_queue[skb->priority];
}
/* Network device handlers */
static const struct net_device_ops mwifiex_netdev_ops = {
.ndo_open = mwifiex_open,
.ndo_stop = mwifiex_close,
.ndo_start_xmit = mwifiex_hard_start_xmit,
.ndo_set_mac_address = mwifiex_set_mac_address,
.ndo_tx_timeout = mwifiex_tx_timeout,
.ndo_get_stats = mwifiex_get_stats,
.ndo_set_rx_mode = mwifiex_set_multicast_list,
.ndo_select_queue = mwifiex_netdev_select_wmm_queue,
};
/*
* This function initializes the private structure parameters.
*
* The following wait queues are initialized -
* - IOCTL wait queue
* - Command wait queue
* - Statistics wait queue
*
* ...and the following default parameters are set -
* - Current key index : Set to 0
* - Rate index : Set to auto
* - Media connected : Set to disconnected
* - Adhoc link sensed : Set to false
* - Nick name : Set to null
* - Number of Tx timeout : Set to 0
* - Device address : Set to current address
*
* In addition, the CFG80211 work queue is also created.
*/
void mwifiex_init_priv_params(struct mwifiex_private *priv,
struct net_device *dev)
{
dev->netdev_ops = &mwifiex_netdev_ops;
dev->destructor = free_netdev;
/* Initialize private structure */
priv->current_key_index = 0;
priv->media_connected = false;
memset(&priv->nick_name, 0, sizeof(priv->nick_name));
memset(priv->mgmt_ie, 0,
sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
priv->num_tx_timeout = 0;
memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
}
/*
* This function check if command is pending.
*/
int is_command_pending(struct mwifiex_adapter *adapter)
{
unsigned long flags;
int is_cmd_pend_q_empty;
spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
return !is_cmd_pend_q_empty;
}
/*
* This is the main work queue function.
*
* It handles the main process, which in turn handles the complete
* driver operations.
*/
static void mwifiex_main_work_queue(struct work_struct *work)
{
struct mwifiex_adapter *adapter =
container_of(work, struct mwifiex_adapter, main_work);
if (adapter->surprise_removed)
return;
mwifiex_main_process(adapter);
}
/*
* 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);
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 =
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);
/* 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;
}
EXPORT_SYMBOL_GPL(mwifiex_add_card);
/*
* 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;
/* 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;
/* 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();
}
wiphy_unregister(adapter->wiphy);
wiphy_free(adapter->wiphy);
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;
}
EXPORT_SYMBOL_GPL(mwifiex_remove_card);
/*
* This function initializes the module.
*
* The debug FS is also initialized if configured.
*/
static int
mwifiex_init_module(void)
{
#ifdef CONFIG_DEBUG_FS
mwifiex_debugfs_init();
#endif
return 0;
}
/*
* This function cleans up the module.
*
* The debug FS is removed if available.
*/
static void
mwifiex_cleanup_module(void)
{
#ifdef CONFIG_DEBUG_FS
mwifiex_debugfs_remove();
#endif
}
module_init(mwifiex_init_module);
module_exit(mwifiex_cleanup_module);
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL v2");
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