main.c 41.5 KB
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/**
  * This file contains the major functions in WLAN
  * driver. It includes init, exit, open, close and main
  * thread etc..
  */

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#include <linux/moduleparam.h>
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#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
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#include <linux/kthread.h>
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#include <linux/kfifo.h>
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#include <linux/stddef.h>
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#include <net/iw_handler.h>
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#include <net/ieee80211.h>
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#include "host.h"
#include "decl.h"
#include "dev.h"
#include "wext.h"
#include "debugfs.h"
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#include "scan.h"
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#include "assoc.h"
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#include "cmd.h"
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#define DRIVER_RELEASE_VERSION "323.p0"
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const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
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#ifdef  DEBUG
    "-dbg"
#endif
    "";

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/* Module parameters */
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unsigned int lbs_debug;
EXPORT_SYMBOL_GPL(lbs_debug);
module_param_named(libertas_debug, lbs_debug, int, 0644);
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/* This global structure is used to send the confirm_sleep command as
 * fast as possible down to the firmware. */
struct cmd_confirm_sleep confirm_sleep;


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#define LBS_TX_PWR_DEFAULT		20	/*100mW */
#define LBS_TX_PWR_US_DEFAULT		20	/*100mW */
#define LBS_TX_PWR_JP_DEFAULT		16	/*50mW */
#define LBS_TX_PWR_FR_DEFAULT		20	/*100mW */
#define LBS_TX_PWR_EMEA_DEFAULT	20	/*100mW */
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/* Format { channel, frequency (MHz), maxtxpower } */
/* band: 'B/G', region: USA FCC/Canada IC */
static struct chan_freq_power channel_freq_power_US_BG[] = {
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	{1, 2412, LBS_TX_PWR_US_DEFAULT},
	{2, 2417, LBS_TX_PWR_US_DEFAULT},
	{3, 2422, LBS_TX_PWR_US_DEFAULT},
	{4, 2427, LBS_TX_PWR_US_DEFAULT},
	{5, 2432, LBS_TX_PWR_US_DEFAULT},
	{6, 2437, LBS_TX_PWR_US_DEFAULT},
	{7, 2442, LBS_TX_PWR_US_DEFAULT},
	{8, 2447, LBS_TX_PWR_US_DEFAULT},
	{9, 2452, LBS_TX_PWR_US_DEFAULT},
	{10, 2457, LBS_TX_PWR_US_DEFAULT},
	{11, 2462, LBS_TX_PWR_US_DEFAULT}
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};

/* band: 'B/G', region: Europe ETSI */
static struct chan_freq_power channel_freq_power_EU_BG[] = {
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	{1, 2412, LBS_TX_PWR_EMEA_DEFAULT},
	{2, 2417, LBS_TX_PWR_EMEA_DEFAULT},
	{3, 2422, LBS_TX_PWR_EMEA_DEFAULT},
	{4, 2427, LBS_TX_PWR_EMEA_DEFAULT},
	{5, 2432, LBS_TX_PWR_EMEA_DEFAULT},
	{6, 2437, LBS_TX_PWR_EMEA_DEFAULT},
	{7, 2442, LBS_TX_PWR_EMEA_DEFAULT},
	{8, 2447, LBS_TX_PWR_EMEA_DEFAULT},
	{9, 2452, LBS_TX_PWR_EMEA_DEFAULT},
	{10, 2457, LBS_TX_PWR_EMEA_DEFAULT},
	{11, 2462, LBS_TX_PWR_EMEA_DEFAULT},
	{12, 2467, LBS_TX_PWR_EMEA_DEFAULT},
	{13, 2472, LBS_TX_PWR_EMEA_DEFAULT}
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};

/* band: 'B/G', region: Spain */
static struct chan_freq_power channel_freq_power_SPN_BG[] = {
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	{10, 2457, LBS_TX_PWR_DEFAULT},
	{11, 2462, LBS_TX_PWR_DEFAULT}
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};

/* band: 'B/G', region: France */
static struct chan_freq_power channel_freq_power_FR_BG[] = {
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	{10, 2457, LBS_TX_PWR_FR_DEFAULT},
	{11, 2462, LBS_TX_PWR_FR_DEFAULT},
	{12, 2467, LBS_TX_PWR_FR_DEFAULT},
	{13, 2472, LBS_TX_PWR_FR_DEFAULT}
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};

/* band: 'B/G', region: Japan */
static struct chan_freq_power channel_freq_power_JPN_BG[] = {
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	{1, 2412, LBS_TX_PWR_JP_DEFAULT},
	{2, 2417, LBS_TX_PWR_JP_DEFAULT},
	{3, 2422, LBS_TX_PWR_JP_DEFAULT},
	{4, 2427, LBS_TX_PWR_JP_DEFAULT},
	{5, 2432, LBS_TX_PWR_JP_DEFAULT},
	{6, 2437, LBS_TX_PWR_JP_DEFAULT},
	{7, 2442, LBS_TX_PWR_JP_DEFAULT},
	{8, 2447, LBS_TX_PWR_JP_DEFAULT},
	{9, 2452, LBS_TX_PWR_JP_DEFAULT},
	{10, 2457, LBS_TX_PWR_JP_DEFAULT},
	{11, 2462, LBS_TX_PWR_JP_DEFAULT},
	{12, 2467, LBS_TX_PWR_JP_DEFAULT},
	{13, 2472, LBS_TX_PWR_JP_DEFAULT},
	{14, 2484, LBS_TX_PWR_JP_DEFAULT}
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};

/**
 * the structure for channel, frequency and power
 */
struct region_cfp_table {
	u8 region;
	struct chan_freq_power *cfp_BG;
	int cfp_no_BG;
};

/**
 * the structure for the mapping between region and CFP
 */
static struct region_cfp_table region_cfp_table[] = {
	{0x10,			/*US FCC */
	 channel_freq_power_US_BG,
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	 ARRAY_SIZE(channel_freq_power_US_BG),
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	 }
	,
	{0x20,			/*CANADA IC */
	 channel_freq_power_US_BG,
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	 ARRAY_SIZE(channel_freq_power_US_BG),
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	 }
	,
	{0x30, /*EU*/ channel_freq_power_EU_BG,
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	 ARRAY_SIZE(channel_freq_power_EU_BG),
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	 }
	,
	{0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
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	 ARRAY_SIZE(channel_freq_power_SPN_BG),
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	 }
	,
	{0x32, /*FRANCE*/ channel_freq_power_FR_BG,
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	 ARRAY_SIZE(channel_freq_power_FR_BG),
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	 }
	,
	{0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
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	 ARRAY_SIZE(channel_freq_power_JPN_BG),
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	 }
	,
/*Add new region here */
};

/**
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 * the table to keep region code
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 */
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u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
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    { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
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/**
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 * 802.11b/g supported bitrates (in 500Kb/s units)
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 */
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u8 lbs_bg_rates[MAX_RATES] =
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    { 0x02, 0x04, 0x0b, 0x16, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
0x00, 0x00 };
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/**
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 * FW rate table.  FW refers to rates by their index in this table, not by the
 * rate value itself.  Values of 0x00 are
 * reserved positions.
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 */
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static u8 fw_data_rates[MAX_RATES] =
    { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
      0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
};
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/**
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 *  @brief use index to get the data rate
 *
 *  @param idx                The index of data rate
 *  @return 	   		data rate or 0
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 */
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u32 lbs_fw_index_to_data_rate(u8 idx)
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{
	if (idx >= sizeof(fw_data_rates))
		idx = 0;
	return fw_data_rates[idx];
}

/**
 *  @brief use rate to get the index
 *
 *  @param rate                 data rate
 *  @return 	   		index or 0
 */
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u8 lbs_data_rate_to_fw_index(u32 rate)
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{
	u8 i;

	if (!rate)
		return 0;

	for (i = 0; i < sizeof(fw_data_rates); i++) {
		if (rate == fw_data_rates[i])
			return i;
	}
	return 0;
}
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/**
 * Attributes exported through sysfs
 */

/**
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 * @brief Get function for sysfs attribute anycast_mask
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 */
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static ssize_t lbs_anycast_get(struct device *dev,
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		struct device_attribute *attr, char * buf)
{
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	struct lbs_private *priv = to_net_dev(dev)->priv;
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	struct cmd_ds_mesh_access mesh_access;
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	int ret;
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	memset(&mesh_access, 0, sizeof(mesh_access));
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	ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access);
	if (ret)
		return ret;
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	return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
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}

/**
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 * @brief Set function for sysfs attribute anycast_mask
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 */
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static ssize_t lbs_anycast_set(struct device *dev,
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		struct device_attribute *attr, const char * buf, size_t count)
{
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	struct lbs_private *priv = to_net_dev(dev)->priv;
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	struct cmd_ds_mesh_access mesh_access;
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	uint32_t datum;
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	int ret;
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	memset(&mesh_access, 0, sizeof(mesh_access));
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	sscanf(buf, "%x", &datum);
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	mesh_access.data[0] = cpu_to_le32(datum);

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	ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access);
	if (ret)
		return ret;

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	return strlen(buf);
}

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static int lbs_add_rtap(struct lbs_private *priv);
static void lbs_remove_rtap(struct lbs_private *priv);
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static int lbs_add_mesh(struct lbs_private *priv);
static void lbs_remove_mesh(struct lbs_private *priv);
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/**
 * Get function for sysfs attribute rtap
 */
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static ssize_t lbs_rtap_get(struct device *dev,
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		struct device_attribute *attr, char * buf)
{
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	struct lbs_private *priv = to_net_dev(dev)->priv;
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	return snprintf(buf, 5, "0x%X\n", priv->monitormode);
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}

/**
 *  Set function for sysfs attribute rtap
 */
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static ssize_t lbs_rtap_set(struct device *dev,
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		struct device_attribute *attr, const char * buf, size_t count)
{
	int monitor_mode;
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	struct lbs_private *priv = to_net_dev(dev)->priv;
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	sscanf(buf, "%x", &monitor_mode);
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	if (monitor_mode) {
		if (priv->monitormode == monitor_mode)
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			return strlen(buf);
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		if (!priv->monitormode) {
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			if (priv->infra_open || priv->mesh_open)
				return -EBUSY;
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			if (priv->mode == IW_MODE_INFRA)
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				lbs_cmd_80211_deauthenticate(priv,
							     priv->curbssparams.bssid,
							     WLAN_REASON_DEAUTH_LEAVING);
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			else if (priv->mode == IW_MODE_ADHOC)
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				lbs_adhoc_stop(priv);
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			lbs_add_rtap(priv);
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		}
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		priv->monitormode = monitor_mode;
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	} else {
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		if (!priv->monitormode)
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			return strlen(buf);
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		priv->monitormode = 0;
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		lbs_remove_rtap(priv);
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		if (priv->currenttxskb) {
			dev_kfree_skb_any(priv->currenttxskb);
			priv->currenttxskb = NULL;
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		}

		/* Wake queues, command thread, etc. */
		lbs_host_to_card_done(priv);
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	}

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	lbs_prepare_and_send_command(priv,
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			CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
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			CMD_OPTION_WAITFORRSP, 0, &priv->monitormode);
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	return strlen(buf);
}

/**
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 * lbs_rtap attribute to be exported per ethX interface
 * through sysfs (/sys/class/net/ethX/lbs_rtap)
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 */
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static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get, lbs_rtap_set );

/**
 * Get function for sysfs attribute mesh
 */
static ssize_t lbs_mesh_get(struct device *dev,
		struct device_attribute *attr, char * buf)
{
	struct lbs_private *priv = to_net_dev(dev)->priv;
	return snprintf(buf, 5, "0x%X\n", !!priv->mesh_dev);
}

/**
 *  Set function for sysfs attribute mesh
 */
static ssize_t lbs_mesh_set(struct device *dev,
		struct device_attribute *attr, const char * buf, size_t count)
{
	struct lbs_private *priv = to_net_dev(dev)->priv;
	int enable;
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	int ret, action = CMD_ACT_MESH_CONFIG_STOP;
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	sscanf(buf, "%x", &enable);
	enable = !!enable;
	if (enable == !!priv->mesh_dev)
		return count;
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	if (enable)
		action = CMD_ACT_MESH_CONFIG_START;
	ret = lbs_mesh_config(priv, action, priv->curbssparams.channel);
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	if (ret)
		return ret;
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	if (enable)
		lbs_add_mesh(priv);
	else
		lbs_remove_mesh(priv);

	return count;
}

/**
 * lbs_mesh attribute to be exported per ethX interface
 * through sysfs (/sys/class/net/ethX/lbs_mesh)
 */
static DEVICE_ATTR(lbs_mesh, 0644, lbs_mesh_get, lbs_mesh_set);
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/**
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 * anycast_mask attribute to be exported per mshX interface
 * through sysfs (/sys/class/net/mshX/anycast_mask)
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 */
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static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set);
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static struct attribute *lbs_mesh_sysfs_entries[] = {
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	&dev_attr_anycast_mask.attr,
	NULL,
};

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static struct attribute_group lbs_mesh_attr_group = {
	.attrs = lbs_mesh_sysfs_entries,
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};

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/**
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 *  @brief This function opens the ethX or mshX interface
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 *
 *  @param dev     A pointer to net_device structure
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 *  @return 	   0 or -EBUSY if monitor mode active
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 */
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static int lbs_dev_open(struct net_device *dev)
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{
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	struct lbs_private *priv = (struct lbs_private *) dev->priv ;
	int ret = 0;
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	lbs_deb_enter(LBS_DEB_NET);

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	spin_lock_irq(&priv->driver_lock);
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	if (priv->monitormode) {
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		ret = -EBUSY;
		goto out;
	}
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	if (dev == priv->mesh_dev) {
		priv->mesh_open = 1;
		priv->mesh_connect_status = LBS_CONNECTED;
		netif_carrier_on(dev);
	} else {
		priv->infra_open = 1;
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		if (priv->connect_status == LBS_CONNECTED)
			netif_carrier_on(dev);
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		else
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			netif_carrier_off(dev);
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	}
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	if (!priv->tx_pending_len)
		netif_wake_queue(dev);
 out:
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	spin_unlock_irq(&priv->driver_lock);
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	lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
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	return ret;
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}

/**
 *  @brief This function closes the mshX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return 	   0
 */
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static int lbs_mesh_stop(struct net_device *dev)
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{
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	struct lbs_private *priv = (struct lbs_private *) (dev->priv);
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	lbs_deb_enter(LBS_DEB_MESH);
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	spin_lock_irq(&priv->driver_lock);

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	priv->mesh_open = 0;
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	priv->mesh_connect_status = LBS_DISCONNECTED;

	netif_stop_queue(dev);
	netif_carrier_off(dev);
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	spin_unlock_irq(&priv->driver_lock);
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	schedule_work(&priv->mcast_work);

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	lbs_deb_leave(LBS_DEB_MESH);
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	return 0;
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}

/**
 *  @brief This function closes the ethX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return 	   0
 */
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static int lbs_eth_stop(struct net_device *dev)
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{
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	struct lbs_private *priv = (struct lbs_private *) dev->priv;
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	lbs_deb_enter(LBS_DEB_NET);
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	spin_lock_irq(&priv->driver_lock);
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	priv->infra_open = 0;
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	netif_stop_queue(dev);
	spin_unlock_irq(&priv->driver_lock);
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	schedule_work(&priv->mcast_work);

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	lbs_deb_leave(LBS_DEB_NET);
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	return 0;
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}

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static void lbs_tx_timeout(struct net_device *dev)
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{
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	struct lbs_private *priv = (struct lbs_private *) dev->priv;
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	lbs_deb_enter(LBS_DEB_TX);
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	lbs_pr_err("tx watch dog timeout\n");
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	dev->trans_start = jiffies;

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	if (priv->currenttxskb)
		lbs_send_tx_feedback(priv, 0);

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	/* XX: Shouldn't we also call into the hw-specific driver
	   to kick it somehow? */
	lbs_host_to_card_done(priv);
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	/* More often than not, this actually happens because the
	   firmware has crapped itself -- rather than just a very
	   busy medium. So send a harmless command, and if/when
	   _that_ times out, we'll kick it in the head. */
	lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
				     0, 0, NULL);

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	lbs_deb_leave(LBS_DEB_TX);
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}

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void lbs_host_to_card_done(struct lbs_private *priv)
{
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	unsigned long flags;

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	lbs_deb_enter(LBS_DEB_THREAD);

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	spin_lock_irqsave(&priv->driver_lock, flags);
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	priv->dnld_sent = DNLD_RES_RECEIVED;

	/* Wake main thread if commands are pending */
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	if (!priv->cur_cmd || priv->tx_pending_len > 0)
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		wake_up_interruptible(&priv->waitq);

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	spin_unlock_irqrestore(&priv->driver_lock, flags);
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	lbs_deb_leave(LBS_DEB_THREAD);
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}
EXPORT_SYMBOL_GPL(lbs_host_to_card_done);

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/**
 *  @brief This function returns the network statistics
 *
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 *  @param dev     A pointer to struct lbs_private structure
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 *  @return 	   A pointer to net_device_stats structure
 */
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static struct net_device_stats *lbs_get_stats(struct net_device *dev)
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{
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	struct lbs_private *priv = (struct lbs_private *) dev->priv;
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	lbs_deb_enter(LBS_DEB_NET);
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	return &priv->stats;
}

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static int lbs_set_mac_address(struct net_device *dev, void *addr)
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{
	int ret = 0;
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	struct lbs_private *priv = (struct lbs_private *) dev->priv;
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	struct sockaddr *phwaddr = addr;
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	struct cmd_ds_802_11_mac_address cmd;
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	lbs_deb_enter(LBS_DEB_NET);
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	/* In case it was called from the mesh device */
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	dev = priv->dev;
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	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
	cmd.action = cpu_to_le16(CMD_ACT_SET);
	memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN);
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	ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
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	if (ret) {
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		lbs_deb_net("set MAC address failed\n");
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		goto done;
	}

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	memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
	memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
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	if (priv->mesh_dev)
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		memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
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done:
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	lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
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	return ret;
}

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static inline int mac_in_list(unsigned char *list, int list_len,
			      unsigned char *mac)
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{
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	while (list_len) {
		if (!memcmp(list, mac, ETH_ALEN))
			return 1;
		list += ETH_ALEN;
		list_len--;
	}
	return 0;
}

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static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
			       struct net_device *dev, int nr_addrs)
{
	int i = nr_addrs;
	struct dev_mc_list *mc_list;
	DECLARE_MAC_BUF(mac);

	if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
		return nr_addrs;

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	netif_addr_lock_bh(dev);
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	for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) {
		if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) {
			lbs_deb_net("mcast address %s:%s skipped\n", dev->name,
				    print_mac(mac, mc_list->dmi_addr));
			continue;
		}
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		if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
			break;
		memcpy(&cmd->maclist[6*i], mc_list->dmi_addr, ETH_ALEN);
		lbs_deb_net("mcast address %s:%s added to filter\n", dev->name,
			    print_mac(mac, mc_list->dmi_addr));
		i++;
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	}
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	netif_addr_unlock_bh(dev);
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	if (mc_list)
		return -EOVERFLOW;

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	return i;
}

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static void lbs_set_mcast_worker(struct work_struct *work)
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{
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	struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
	struct cmd_ds_mac_multicast_adr mcast_cmd;
	int dev_flags;
	int nr_addrs;
	int old_mac_control = priv->mac_control;
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	lbs_deb_enter(LBS_DEB_NET);
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	dev_flags = priv->dev->flags;
	if (priv->mesh_dev)
		dev_flags |= priv->mesh_dev->flags;

	if (dev_flags & IFF_PROMISC) {
		priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
		priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
				       CMD_ACT_MAC_MULTICAST_ENABLE);
		goto out_set_mac_control;
	} else if (dev_flags & IFF_ALLMULTI) {
	do_allmulti:
		priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
		priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
				       CMD_ACT_MAC_MULTICAST_ENABLE);
		goto out_set_mac_control;
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	}

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	/* Once for priv->dev, again for priv->mesh_dev if it exists */
	nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
	if (nr_addrs >= 0 && priv->mesh_dev)
		nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
	if (nr_addrs < 0)
		goto do_allmulti;

	if (nr_addrs) {
		int size = offsetof(struct cmd_ds_mac_multicast_adr,
				    maclist[6*nr_addrs]);

		mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
		mcast_cmd.hdr.size = cpu_to_le16(size);
		mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);

		lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);

		priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
	} else
		priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;

	priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
			       CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
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	if (priv->mac_control != old_mac_control)
		lbs_set_mac_control(priv);
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	lbs_deb_leave(LBS_DEB_NET);
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}

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static void lbs_set_multicast_list(struct net_device *dev)
{
	struct lbs_private *priv = dev->priv;

	schedule_work(&priv->mcast_work);
}

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/**
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 *  @brief This function handles the major jobs in the LBS driver.
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 *  It handles all events generated by firmware, RX data received
 *  from firmware and TX data sent from kernel.
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 *
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 *  @param data    A pointer to lbs_thread structure
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 *  @return 	   0
 */
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static int lbs_thread(void *data)
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{
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	struct net_device *dev = data;
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	struct lbs_private *priv = dev->priv;
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	wait_queue_t wait;

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	lbs_deb_enter(LBS_DEB_THREAD);
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	init_waitqueue_entry(&wait, current);

	for (;;) {
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		int shouldsleep;
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		u8 resp_idx;
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		lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
				priv->currenttxskb, priv->dnld_sent);
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		add_wait_queue(&priv->waitq, &wait);
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		set_current_state(TASK_INTERRUPTIBLE);
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		spin_lock_irq(&priv->driver_lock);
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		if (kthread_should_stop())
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			shouldsleep = 0;	/* Bye */
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		else if (priv->surpriseremoved)
			shouldsleep = 1;	/* We need to wait until we're _told_ to die */
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		else if (priv->psstate == PS_STATE_SLEEP)
			shouldsleep = 1;	/* Sleep mode. Nothing we can do till it wakes */
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		else if (priv->cmd_timed_out)
			shouldsleep = 0;	/* Command timed out. Recover */
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		else if (!priv->fw_ready)
			shouldsleep = 1;	/* Firmware not ready. We're waiting for it */
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		else if (priv->dnld_sent)
			shouldsleep = 1;	/* Something is en route to the device already */
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		else if (priv->tx_pending_len > 0)
			shouldsleep = 0;	/* We've a packet to send */
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		else if (priv->resp_len[priv->resp_idx])
			shouldsleep = 0;	/* We have a command response */
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		else if (priv->cur_cmd)
			shouldsleep = 1;	/* Can't send a command; one already running */
		else if (!list_empty(&priv->cmdpendingq))
			shouldsleep = 0;	/* We have a command to send */
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		else if (__kfifo_len(priv->event_fifo))
			shouldsleep = 0;	/* We have an event to process */
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		else
			shouldsleep = 1;	/* No command */

		if (shouldsleep) {
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			lbs_deb_thread("sleeping, connect_status %d, "
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				"psmode %d, psstate %d\n",
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				priv->connect_status,
				priv->psmode, priv->psstate);
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			spin_unlock_irq(&priv->driver_lock);
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			schedule();
		} else
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			spin_unlock_irq(&priv->driver_lock);
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		lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
			       priv->currenttxskb, priv->dnld_sent);
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		set_current_state(TASK_RUNNING);
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		remove_wait_queue(&priv->waitq, &wait);
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		lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
			       priv->currenttxskb, priv->dnld_sent);
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		if (kthread_should_stop()) {
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			lbs_deb_thread("break from main thread\n");
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			break;
		}

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		if (priv->surpriseremoved) {
			lbs_deb_thread("adapter removed; waiting to die...\n");
			continue;
		}
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		lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
		       priv->currenttxskb, priv->dnld_sent);
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		/* Process any pending command response */
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		spin_lock_irq(&priv->driver_lock);
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		resp_idx = priv->resp_idx;
		if (priv->resp_len[resp_idx]) {
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			spin_unlock_irq(&priv->driver_lock);
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			lbs_process_command_response(priv,
				priv->resp_buf[resp_idx],
				priv->resp_len[resp_idx]);
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			spin_lock_irq(&priv->driver_lock);
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			priv->resp_len[resp_idx] = 0;
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		}
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		spin_unlock_irq(&priv->driver_lock);
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		/* command timeout stuff */
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		if (priv->cmd_timed_out && priv->cur_cmd) {
			struct cmd_ctrl_node *cmdnode = priv->cur_cmd;

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			if (++priv->nr_retries > 3) {
				lbs_pr_info("Excessive timeouts submitting "
					"command 0x%04x\n",
					le16_to_cpu(cmdnode->cmdbuf->command));
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				lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
				priv->nr_retries = 0;
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				if (priv->reset_card)
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					priv->reset_card(priv);
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			} else {
				priv->cur_cmd = NULL;
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				priv->dnld_sent = DNLD_RES_RECEIVED;
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				lbs_pr_info("requeueing command 0x%04x due "
					"to timeout (#%d)\n",
					le16_to_cpu(cmdnode->cmdbuf->command),
					priv->nr_retries);
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				/* Stick it back at the _top_ of the pending queue
				   for immediate resubmission */
				list_add(&cmdnode->list, &priv->cmdpendingq);
			}
		}
		priv->cmd_timed_out = 0;

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		/* Process hardware events, e.g. card removed, link lost */
		spin_lock_irq(&priv->driver_lock);
		while (__kfifo_len(priv->event_fifo)) {
			u32 event;
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			__kfifo_get(priv->event_fifo, (unsigned char *) &event,
				sizeof(event));
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			spin_unlock_irq(&priv->driver_lock);
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			lbs_process_event(priv, event);
			spin_lock_irq(&priv->driver_lock);
		}
		spin_unlock_irq(&priv->driver_lock);
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		if (!priv->fw_ready)
			continue;

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		/* Check if we need to confirm Sleep Request received previously */
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		if (priv->psstate == PS_STATE_PRE_SLEEP &&
		    !priv->dnld_sent && !priv->cur_cmd) {
			if (priv->connect_status == LBS_CONNECTED) {
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				lbs_deb_thread("pre-sleep, currenttxskb %p, "
					"dnld_sent %d, cur_cmd %p\n",
					priv->currenttxskb, priv->dnld_sent,
					priv->cur_cmd);
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				lbs_ps_confirm_sleep(priv);
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			} else {
				/* workaround for firmware sending
				 * deauth/linkloss event immediately
				 * after sleep request; remove this
				 * after firmware fixes it
				 */
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				priv->psstate = PS_STATE_AWAKE;
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				lbs_pr_alert("ignore PS_SleepConfirm in "
					"non-connected state\n");
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			}
		}

		/* The PS state is changed during processing of Sleep Request
		 * event above
		 */
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		if ((priv->psstate == PS_STATE_SLEEP) ||
		    (priv->psstate == PS_STATE_PRE_SLEEP))
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			continue;

		/* Execute the next command */
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		if (!priv->dnld_sent && !priv->cur_cmd)
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			lbs_execute_next_command(priv);
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		/* Wake-up command waiters which can't sleep in
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		 * lbs_prepare_and_send_command
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		 */
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		if (!list_empty(&priv->cmdpendingq))
			wake_up_all(&priv->cmd_pending);
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		spin_lock_irq(&priv->driver_lock);
		if (!priv->dnld_sent && priv->tx_pending_len > 0) {
			int ret = priv->hw_host_to_card(priv, MVMS_DAT,
							priv->tx_pending_buf,
							priv->tx_pending_len);
			if (ret) {
				lbs_deb_tx("host_to_card failed %d\n", ret);
				priv->dnld_sent = DNLD_RES_RECEIVED;
			}
			priv->tx_pending_len = 0;
			if (!priv->currenttxskb) {
				/* We can wake the queues immediately if we aren't
				   waiting for TX feedback */
				if (priv->connect_status == LBS_CONNECTED)
					netif_wake_queue(priv->dev);
				if (priv->mesh_dev &&
				    priv->mesh_connect_status == LBS_CONNECTED)
					netif_wake_queue(priv->mesh_dev);
			}
		}
		spin_unlock_irq(&priv->driver_lock);
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	}

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	del_timer(&priv->command_timer);
	wake_up_all(&priv->cmd_pending);
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	lbs_deb_leave(LBS_DEB_THREAD);
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	return 0;
}

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static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
				struct cmd_header *cmd)
{
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	lbs_deb_enter(LBS_DEB_FW);
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	netif_device_detach(priv->dev);
	if (priv->mesh_dev)
		netif_device_detach(priv->mesh_dev);

	priv->fw_ready = 0;
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	lbs_deb_leave(LBS_DEB_FW);
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	return 0;
}

int lbs_suspend(struct lbs_private *priv)
{
	struct cmd_header cmd;
	int ret;

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	lbs_deb_enter(LBS_DEB_FW);

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	if (priv->wol_criteria == 0xffffffff) {
		lbs_pr_info("Suspend attempt without configuring wake params!\n");
		return -EINVAL;
	}

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	memset(&cmd, 0, sizeof(cmd));
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	ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
			sizeof(cmd), lbs_suspend_callback, 0);
	if (ret)
		lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);

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	lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
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	return ret;
}
EXPORT_SYMBOL_GPL(lbs_suspend);

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void lbs_resume(struct lbs_private *priv)
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{
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	lbs_deb_enter(LBS_DEB_FW);

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	priv->fw_ready = 1;

	/* Firmware doesn't seem to give us RX packets any more
	   until we send it some command. Might as well update */
	lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
				     0, 0, NULL);

	netif_device_attach(priv->dev);
	if (priv->mesh_dev)
		netif_device_attach(priv->mesh_dev);

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	lbs_deb_leave(LBS_DEB_FW);
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}
EXPORT_SYMBOL_GPL(lbs_resume);

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/**
 *  @brief This function downloads firmware image, gets
 *  HW spec from firmware and set basic parameters to
 *  firmware.
 *
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 *  @param priv    A pointer to struct lbs_private structure
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 *  @return 	   0 or -1
 */
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static int lbs_setup_firmware(struct lbs_private *priv)
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{
	int ret = -1;
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	s16 curlevel = 0, minlevel = 0, maxlevel = 0;
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	lbs_deb_enter(LBS_DEB_FW);

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	/* Read MAC address from firmware */
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	memset(priv->current_addr, 0xff, ETH_ALEN);
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	ret = lbs_update_hw_spec(priv);
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	if (ret)
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		goto done;

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	/* Read power levels if available */
	ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
	if (ret == 0) {
		priv->txpower_cur = curlevel;
		priv->txpower_min = minlevel;
		priv->txpower_max = maxlevel;
	}

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	lbs_set_mac_control(priv);
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done:
	lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
	return ret;
}

/**
 *  This function handles the timeout of command sending.
 *  It will re-send the same command again.
 */
static void command_timer_fn(unsigned long data)
{
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	struct lbs_private *priv = (struct lbs_private *)data;
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	unsigned long flags;

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	lbs_deb_enter(LBS_DEB_CMD);
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	spin_lock_irqsave(&priv->driver_lock, flags);
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	if (!priv->cur_cmd)
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		goto out;
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	lbs_pr_info("command 0x%04x timed out\n",
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