main.c 30.7 KB
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/*
 * Marvell Wireless LAN device driver: major functions
 *
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Xinming Hu 已提交
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 * Copyright (C) 2011-2014, Marvell International Ltd.
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 *
 * 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) ";
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static char *cal_data_cfg;
module_param(cal_data_cfg, charp, 0);
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static unsigned short driver_mode;
module_param(driver_mode, ushort, 0);
MODULE_PARM_DESC(driver_mode,
		 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");

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/*
 * 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,
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			    void **padapter)
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{
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	struct mwifiex_adapter *adapter;
	int i;
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	adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
	if (!adapter)
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		return -ENOMEM;
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	*padapter = adapter;
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	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 .. */
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	if (adapter->if_ops.init_if)
		if (adapter->if_ops.init_if(adapter))
			goto error;
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	adapter->priv_num = 0;

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	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;
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		adapter->priv[i]->adapter = adapter;
		adapter->priv_num++;
	}
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	mwifiex_init_lock_list(adapter);
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	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");

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	for (i = 0; i < adapter->priv_num; i++)
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		kfree(adapter->priv[i]);
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	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)
{
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	s32 i;
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	if (adapter->if_ops.cleanup_if)
		adapter->if_ops.cleanup_if(adapter);

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	del_timer_sync(&adapter->cmd_timer);
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	/* Free private structures */
	for (i = 0; i < adapter->priv_num; i++) {
		if (adapter->priv[i]) {
			mwifiex_free_curr_bcn(adapter->priv[i]);
			kfree(adapter->priv[i]);
		}
	}

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	vfree(adapter->chan_stats);
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	kfree(adapter);
	return 0;
}

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static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
{
	unsigned long flags;
	struct sk_buff *skb;

	spin_lock_irqsave(&adapter->rx_proc_lock, flags);
	if (adapter->rx_processing || adapter->rx_locked) {
		spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
		goto exit_rx_proc;
	} else {
		adapter->rx_processing = true;
		spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
	}

	/* Check for Rx data */
	while ((skb = skb_dequeue(&adapter->rx_data_q))) {
		atomic_dec(&adapter->rx_pending);
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		if ((adapter->delay_main_work ||
		     adapter->iface_type == MWIFIEX_USB) &&
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		    (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
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			if (adapter->if_ops.submit_rem_rx_urbs)
				adapter->if_ops.submit_rem_rx_urbs(adapter);
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			adapter->delay_main_work = false;
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			queue_work(adapter->workqueue, &adapter->main_work);
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		}
		mwifiex_handle_rx_packet(adapter, skb);
	}
	spin_lock_irqsave(&adapter->rx_proc_lock, flags);
	adapter->rx_processing = false;
	spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);

exit_rx_proc:
	return 0;
}

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/*
 * 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;

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		/* 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
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		 */
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		if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
		    adapter->iface_type != MWIFIEX_USB) {
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			adapter->delay_main_work = true;
			if (!adapter->rx_processing)
				queue_work(adapter->rx_workqueue,
					   &adapter->rx_work);
			break;
		}

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		/* Handle pending interrupt if any */
		if (adapter->int_status) {
			if (adapter->hs_activated)
				mwifiex_process_hs_config(adapter);
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			if (adapter->if_ops.process_int_status)
				adapter->if_ops.process_int_status(adapter);
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		}

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		if (adapter->rx_work_enabled && adapter->data_received)
			queue_work(adapter->rx_workqueue, &adapter->rx_work);

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		/* Need to wake up the card ? */
		if ((adapter->ps_state == PS_STATE_SLEEP) &&
		    (adapter->pm_wakeup_card_req &&
		     !adapter->pm_wakeup_fw_try) &&
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		    (is_command_pending(adapter) ||
		     !mwifiex_wmm_lists_empty(adapter))) {
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			adapter->pm_wakeup_fw_try = true;
			adapter->if_ops.wakeup(adapter);
			continue;
		}
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		if (IS_CARD_RX_RCVD(adapter)) {
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			adapter->data_received = false;
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			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;

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			if ((!adapter->scan_chan_gap_enabled &&
			     adapter->scan_processing) || adapter->data_sent ||
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			    mwifiex_wmm_lists_empty(adapter)) {
				if (adapter->cmd_sent || adapter->curr_cmd ||
				    (!is_command_pending(adapter)))
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					break;
			}
		}

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		/* Check for event */
		if (adapter->event_received) {
			adapter->event_received = false;
			mwifiex_process_event(adapter);
		}

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		/* 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.
		 */
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		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)
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			continue;

		if (!adapter->cmd_sent && !adapter->curr_cmd) {
			if (mwifiex_exec_next_cmd(adapter) == -1) {
				ret = -1;
				break;
			}
		}

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		if ((adapter->scan_chan_gap_enabled ||
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		     !adapter->scan_processing) &&
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		    !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
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			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 &&
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		    !adapter->curr_cmd && !is_command_pending(adapter) &&
		    mwifiex_wmm_lists_empty(adapter)) {
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			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);

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	spin_lock_irqsave(&adapter->main_proc_lock, flags);
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	if (!adapter->delay_main_work &&
	    (adapter->int_status || IS_CARD_RX_RCVD(adapter))) {
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		spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
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		goto process_start;
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	}
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	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;
}
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EXPORT_SYMBOL_GPL(mwifiex_main_process);
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/*
 * 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__);
}

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/*
 * 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;
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	if (adapter->rx_workqueue) {
		flush_workqueue(adapter->rx_workqueue);
		destroy_workqueue(adapter->rx_workqueue);
		adapter->rx_workqueue = NULL;
	}
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}

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/*
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 * This function gets firmware and initializes it.
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 *
 * The main initialization steps followed are -
 *      - Download the correct firmware to card
 *      - Issue the init commands to firmware
 */
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static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
393
{
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	int ret;
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	char fmt[64];
	struct mwifiex_private *priv;
	struct mwifiex_adapter *adapter = context;
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	struct mwifiex_fw_image fw;
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	struct semaphore *sem = adapter->card_sem;
	bool init_failed = false;
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	struct wireless_dev *wdev;
402

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	if (!firmware) {
		dev_err(adapter->dev,
			"Failed to get firmware %s\n", adapter->fw_name);
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		goto err_dnld_fw;
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	}
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	memset(&fw, 0, sizeof(struct mwifiex_fw_image));
	adapter->firmware = firmware;
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	fw.fw_buf = (u8 *) adapter->firmware->data;
	fw.fw_len = adapter->firmware->size;

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	if (adapter->if_ops.dnld_fw)
		ret = adapter->if_ops.dnld_fw(adapter, &fw);
	else
		ret = mwifiex_dnld_fw(adapter, &fw);
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	if (ret == -1)
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		goto err_dnld_fw;
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	dev_notice(adapter->dev, "WLAN FW is active\n");

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	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");
	}

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	/* enable host interrupt after fw dnld is successful */
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	if (adapter->if_ops.enable_int) {
		if (adapter->if_ops.enable_int(adapter))
			goto err_dnld_fw;
	}
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	adapter->init_wait_q_woken = false;
	ret = mwifiex_init_fw(adapter);
	if (ret == -1) {
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		goto err_init_fw;
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	} 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);
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	if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
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		goto err_init_fw;
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	priv = adapter->priv[MWIFIEX_BSS_ROLE_STA];
	if (mwifiex_register_cfg80211(adapter)) {
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		dev_err(adapter->dev, "cannot register with cfg80211\n");
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		goto err_init_fw;
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	}

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	if (mwifiex_init_channel_scan_gap(adapter)) {
		dev_err(adapter->dev, "could not init channel stats table\n");
		goto err_init_fw;
	}

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	if (driver_mode) {
		driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
		driver_mode |= MWIFIEX_DRIVER_MODE_STA;
	}

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	rtnl_lock();
	/* Create station interface by default */
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	wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d",
					NL80211_IFTYPE_STATION, NULL, NULL);
	if (IS_ERR(wdev)) {
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		dev_err(adapter->dev, "cannot create default STA interface\n");
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		rtnl_unlock();
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		goto err_add_intf;
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	}
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	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;
		}
	}
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	rtnl_unlock();

	mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
	dev_notice(adapter->dev, "driver_version = %s\n", fmt);
	goto done;
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err_add_intf:
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	wiphy_unregister(adapter->wiphy);
	wiphy_free(adapter->wiphy);
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err_init_fw:
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	if (adapter->if_ops.disable_int)
		adapter->if_ops.disable_int(adapter);
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err_dnld_fw:
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	pr_debug("info: %s: unregister device\n", __func__);
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	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);
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	init_failed = true;
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done:
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	if (adapter->cal_data) {
		release_firmware(adapter->cal_data);
		adapter->cal_data = NULL;
	}
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	if (adapter->firmware) {
		release_firmware(adapter->firmware);
		adapter->firmware = NULL;
	}
	if (init_failed)
		mwifiex_free_adapter(adapter);
	up(sem);
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	return;
}

/*
 * This function initializes the hardware and gets firmware.
 */
static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
{
	int ret;

	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);
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	return ret;
}

/*
 * CFG802.11 network device handler for open.
 *
 * Starts the data queue.
 */
static int
mwifiex_open(struct net_device *dev)
{
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	netif_tx_start_all_queues(dev);
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	return 0;
}

/*
 * CFG802.11 network device handler for close.
 */
static int
mwifiex_close(struct net_device *dev)
{
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	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;
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		priv->scan_aborting = true;
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	}

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	return 0;
}

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/*
 * 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)
{
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	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);
		}
	}

603
	atomic_inc(&priv->adapter->tx_pending);
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Avinash Patil 已提交
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	mwifiex_wmm_add_buf_txqueue(priv, skb);
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	queue_work(priv->adapter->workqueue, &priv->adapter->main_work);

	return 0;
}

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static struct sk_buff *
mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
				struct sk_buff *skb, u8 flag)
{
	struct sk_buff *orig_skb = skb;
	struct mwifiex_txinfo *tx_info, *orig_tx_info;

	skb = skb_clone(skb, GFP_ATOMIC);
	if (skb) {
		unsigned long flags;
		int id;

		spin_lock_irqsave(&priv->ack_status_lock, flags);
		id = idr_alloc(&priv->ack_status_frames, orig_skb,
			       1, 0xff, GFP_ATOMIC);
		spin_unlock_irqrestore(&priv->ack_status_lock, flags);

		if (id >= 0) {
			tx_info = MWIFIEX_SKB_TXCB(skb);
			tx_info->ack_frame_id = id;
			tx_info->flags |= flag;
			orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
			orig_tx_info->ack_frame_id = id;
			orig_tx_info->flags |= flag;
		} else if (skb_shared(skb)) {
			kfree_skb(orig_skb);
		} else {
			kfree_skb(skb);
			skb = orig_skb;
		}
	} else {
		/* couldn't clone -- lose tx status ... */
		skb = orig_skb;
	}

	return skb;
}

649 650 651 652 653 654 655
/*
 * 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);
656
	struct sk_buff *new_skb;
657
	struct mwifiex_txinfo *tx_info;
658
	bool multicast;
659

660
	dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n",
661
		jiffies, priv->bss_type, priv->bss_num);
662 663

	if (priv->adapter->surprise_removed) {
664
		kfree_skb(skb);
665 666 667 668 669
		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);
670
		kfree_skb(skb);
671 672 673 674 675 676
		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",
677
			skb_headroom(skb));
678 679 680 681 682
		/* 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");
683
			kfree_skb(skb);
684 685 686 687 688 689
			priv->stats.tx_dropped++;
			return 0;
		}
		kfree_skb(skb);
		skb = new_skb;
		dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
690
			skb_headroom(skb));
691 692 693
	}

	tx_info = MWIFIEX_SKB_TXCB(skb);
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Amitkumar Karwar 已提交
694
	memset(tx_info, 0, sizeof(*tx_info));
695 696
	tx_info->bss_num = priv->bss_num;
	tx_info->bss_type = priv->bss_type;
697
	tx_info->pkt_len = skb->len;
A
Avinash Patil 已提交
698

699 700 701 702 703 704 705 706 707
	multicast = is_multicast_ether_addr(skb->data);

	if (unlikely(!multicast && skb->sk &&
		     skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
		     priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
		skb = mwifiex_clone_skb_for_tx_status(priv,
						      skb,
					MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS);

A
Avinash Patil 已提交
708 709 710 711 712 713 714
	/* 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.
	 */
715
	__net_timestamp(skb);
716

A
Avinash Patil 已提交
717 718 719 720 721 722 723
	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
	    priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
	    !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
		if (priv->adapter->auto_tdls && priv->check_tdls_tx)
			mwifiex_tdls_check_tx(priv, skb);
	}

724
	mwifiex_queue_tx_pkt(priv, skb);
725 726 727 728 729 730 731 732 733 734 735

	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);
736
	struct sockaddr *hw_addr = addr;
737
	int ret;
738 739 740

	memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);

741
	/* Send request to firmware */
742 743
	ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
			       HostCmd_ACT_GEN_SET, 0, NULL, true);
744 745 746 747

	if (!ret)
		memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
	else
748 749
		dev_err(priv->adapter->dev,
			"set mac address failed: ret=%d\n", ret);
750

751 752
	memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);

753
	return ret;
754 755 756 757 758 759 760 761
}

/*
 * 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);
762 763 764 765 766 767 768 769 770
	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;
771 772
		mcast_list.num_multicast_addr =
			mwifiex_copy_mcast_addr(&mcast_list, dev);
773 774
	}
	mwifiex_request_set_multicast_list(priv, &mcast_list);
775 776 777 778 779 780 781 782 783 784 785
}

/*
 * 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++;
786 787 788 789 790 791 792 793 794 795 796 797
	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);
	}
798 799 800 801 802 803 804 805 806 807 808 809
}

/*
 * 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;
}

A
Avinash Patil 已提交
810
static u16
811
mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
812
				void *accel_priv, select_queue_fallback_t fallback)
A
Avinash Patil 已提交
813
{
814
	skb->priority = cfg80211_classify8021d(skb, NULL);
A
Avinash Patil 已提交
815 816 817
	return mwifiex_1d_to_wmm_queue[skb->priority];
}

818 819 820 821 822 823 824 825
/* 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,
826
	.ndo_set_rx_mode = mwifiex_set_multicast_list,
A
Avinash Patil 已提交
827
	.ndo_select_queue = mwifiex_netdev_select_wmm_queue,
828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848
};

/*
 * 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.
 */
849 850
void mwifiex_init_priv_params(struct mwifiex_private *priv,
						struct net_device *dev)
851 852
{
	dev->netdev_ops = &mwifiex_netdev_ops;
853
	dev->destructor = free_netdev;
854 855 856 857
	/* Initialize private structure */
	priv->current_key_index = 0;
	priv->media_connected = false;
	memset(&priv->nick_name, 0, sizeof(priv->nick_name));
A
Avinash Patil 已提交
858 859
	memset(priv->mgmt_ie, 0,
	       sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
860 861 862 863
	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;
864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882
	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;
}

883 884 885 886 887 888 889 890 891 892 893 894 895 896 897
/*
 * This is the RX work queue function.
 *
 * It handles the RX operations.
 */
static void mwifiex_rx_work_queue(struct work_struct *work)
{
	struct mwifiex_adapter *adapter =
		container_of(work, struct mwifiex_adapter, rx_work);

	if (adapter->surprise_removed)
		return;
	mwifiex_process_rx(adapter);
}

898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928
/*
 * 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,
929
		 struct mwifiex_if_ops *if_ops, u8 iface_type)
930
{
931
	struct mwifiex_adapter *adapter;
932 933 934 935

	if (down_interruptible(sem))
		goto exit_sem_err;

936
	if (mwifiex_register(card, if_ops, (void **)&adapter)) {
937 938 939 940
		pr_err("%s: software init failed\n", __func__);
		goto err_init_sw;
	}

941
	adapter->iface_type = iface_type;
942
	adapter->card_sem = sem;
943

944 945 946 947 948 949
	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);
950 951
	init_waitqueue_head(&adapter->cmd_wait_q.wait);
	adapter->cmd_wait_q.status = 0;
952
	adapter->scan_wait_q_woken = false;
953

954
	if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) {
955 956 957 958
		adapter->rx_work_enabled = true;
		pr_notice("rx work enabled, cpus %d\n", num_possible_cpus());
	}

959 960 961
	adapter->workqueue =
		alloc_workqueue("MWIFIEX_WORK_QUEUE",
				WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
962 963 964 965
	if (!adapter->workqueue)
		goto err_kmalloc;

	INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
966 967 968 969 970 971 972 973 974 975 976 977

	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);
	}

978 979
	if (adapter->if_ops.iface_work)
		INIT_WORK(&adapter->iface_work, adapter->if_ops.iface_work);
980 981

	/* Register the device. Fill up the private data structure with relevant
D
Daniel Drake 已提交
982
	   information from the card. */
983 984 985 986 987 988 989 990 991
	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;
	}
992

993 994 995 996
	return 0;

err_init_fw:
	pr_debug("info: %s: unregister device\n", __func__);
997 998
	if (adapter->if_ops.unregister_dev)
		adapter->if_ops.unregister_dev(adapter);
999 1000 1001 1002
	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;
1003 1004

		if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1005 1006 1007
			wait_event_interruptible(adapter->init_wait_q,
						 adapter->init_wait_q_woken);
	}
1008 1009 1010 1011
err_registerdev:
	adapter->surprise_removed = true;
	mwifiex_terminate_workqueue(adapter);
err_kmalloc:
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
	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;

D
Daniel Drake 已提交
1044 1045 1046 1047 1048
	/* 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);

1049 1050 1051 1052 1053
	adapter->surprise_removed = true;

	/* Stop data */
	for (i = 0; i < adapter->priv_num; i++) {
		priv = adapter->priv[i];
1054
		if (priv && priv->netdev) {
A
Avinash Patil 已提交
1055
			mwifiex_stop_net_dev_queue(priv->netdev, adapter);
1056 1057 1058 1059 1060 1061 1062
			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;
1063 1064

	if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
1065 1066 1067 1068 1069
		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) ||
1070
	    atomic_read(&adapter->cmd_pending)) {
1071
		dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
1072
		       "cmd_pending=%d\n",
1073 1074
		       atomic_read(&adapter->rx_pending),
		       atomic_read(&adapter->tx_pending),
1075
		       atomic_read(&adapter->cmd_pending));
1076 1077
	}

1078 1079 1080 1081 1082 1083 1084
	for (i = 0; i < adapter->priv_num; i++) {
		priv = adapter->priv[i];

		if (!priv)
			continue;

		rtnl_lock();
1085
		if (priv->wdev && priv->netdev)
1086
			mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
1087 1088 1089
		rtnl_unlock();
	}

1090 1091
	wiphy_unregister(adapter->wiphy);
	wiphy_free(adapter->wiphy);
1092

1093 1094 1095 1096
	mwifiex_terminate_workqueue(adapter);

	/* Unregister device */
	dev_dbg(adapter->dev, "info: unregister device\n");
1097 1098
	if (adapter->if_ops.unregister_dev)
		adapter->if_ops.unregister_dev(adapter);
1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
	/* 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");