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linux/drivers/net/wireless/libertas/main.c
David Woodhouse 2eb188a1c5 libertas: Move actual transmission to main thread 
The locking issues with TX, especially TX from multiple netdevs, get
_so_ much easier if you do it like this.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-01-28 15:06:30 -08:00

1542 lines
37 KiB
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/**
* This file contains the major functions in WLAN
* driver. It includes init, exit, open, close and main
* thread etc..
*/
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/freezer.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/kthread.h>
#include <net/iw_handler.h>
#include <net/ieee80211.h>
#include "host.h"
#include "decl.h"
#include "dev.h"
#include "wext.h"
#include "debugfs.h"
#include "assoc.h"
#include "join.h"
#define DRIVER_RELEASE_VERSION "323.p0"
const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
#ifdef DEBUG
"-dbg"
#endif
"";
/* Module parameters */
unsigned int lbs_debug;
EXPORT_SYMBOL_GPL(lbs_debug);
module_param_named(libertas_debug, lbs_debug, int, 0644);
#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 */
/* Format { channel, frequency (MHz), maxtxpower } */
/* band: 'B/G', region: USA FCC/Canada IC */
static struct chan_freq_power channel_freq_power_US_BG[] = {
{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}
};
/* band: 'B/G', region: Europe ETSI */
static struct chan_freq_power channel_freq_power_EU_BG[] = {
{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}
};
/* band: 'B/G', region: Spain */
static struct chan_freq_power channel_freq_power_SPN_BG[] = {
{10, 2457, LBS_TX_PWR_DEFAULT},
{11, 2462, LBS_TX_PWR_DEFAULT}
};
/* band: 'B/G', region: France */
static struct chan_freq_power channel_freq_power_FR_BG[] = {
{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}
};
/* band: 'B/G', region: Japan */
static struct chan_freq_power channel_freq_power_JPN_BG[] = {
{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}
};
/**
* 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,
ARRAY_SIZE(channel_freq_power_US_BG),
}
,
{0x20, /*CANADA IC */
channel_freq_power_US_BG,
ARRAY_SIZE(channel_freq_power_US_BG),
}
,
{0x30, /*EU*/ channel_freq_power_EU_BG,
ARRAY_SIZE(channel_freq_power_EU_BG),
}
,
{0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
ARRAY_SIZE(channel_freq_power_SPN_BG),
}
,
{0x32, /*FRANCE*/ channel_freq_power_FR_BG,
ARRAY_SIZE(channel_freq_power_FR_BG),
}
,
{0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
ARRAY_SIZE(channel_freq_power_JPN_BG),
}
,
/*Add new region here */
};
/**
* the table to keep region code
*/
u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
{ 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
/**
* 802.11b/g supported bitrates (in 500Kb/s units)
*/
u8 lbs_bg_rates[MAX_RATES] =
{ 0x02, 0x04, 0x0b, 0x16, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
0x00, 0x00 };
/**
* 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.
*/
static u8 fw_data_rates[MAX_RATES] =
{ 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
};
/**
* @brief use index to get the data rate
*
* @param idx The index of data rate
* @return data rate or 0
*/
u32 lbs_fw_index_to_data_rate(u8 idx)
{
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
*/
u8 lbs_data_rate_to_fw_index(u32 rate)
{
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;
}
/**
* Attributes exported through sysfs
*/
/**
* @brief Get function for sysfs attribute anycast_mask
*/
static ssize_t lbs_anycast_get(struct device *dev,
struct device_attribute *attr, char * buf)
{
struct cmd_ds_mesh_access mesh_access;
memset(&mesh_access, 0, sizeof(mesh_access));
lbs_prepare_and_send_command(to_net_dev(dev)->priv,
CMD_MESH_ACCESS,
CMD_ACT_MESH_GET_ANYCAST,
CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
}
/**
* @brief Set function for sysfs attribute anycast_mask
*/
static ssize_t lbs_anycast_set(struct device *dev,
struct device_attribute *attr, const char * buf, size_t count)
{
struct cmd_ds_mesh_access mesh_access;
uint32_t datum;
memset(&mesh_access, 0, sizeof(mesh_access));
sscanf(buf, "%x", &datum);
mesh_access.data[0] = cpu_to_le32(datum);
lbs_prepare_and_send_command((to_net_dev(dev))->priv,
CMD_MESH_ACCESS,
CMD_ACT_MESH_SET_ANYCAST,
CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
return strlen(buf);
}
int lbs_add_rtap(struct lbs_private *priv);
void lbs_remove_rtap(struct lbs_private *priv);
/**
* Get function for sysfs attribute rtap
*/
static ssize_t lbs_rtap_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->monitormode);
}
/**
* Set function for sysfs attribute rtap
*/
static ssize_t lbs_rtap_set(struct device *dev,
struct device_attribute *attr, const char * buf, size_t count)
{
int monitor_mode;
struct lbs_private *priv = to_net_dev(dev)->priv;
sscanf(buf, "%x", &monitor_mode);
if (monitor_mode != LBS_MONITOR_OFF) {
if(priv->monitormode == monitor_mode)
return strlen(buf);
if (priv->monitormode == LBS_MONITOR_OFF) {
if (priv->mode == IW_MODE_INFRA)
lbs_send_deauthentication(priv);
else if (priv->mode == IW_MODE_ADHOC)
lbs_stop_adhoc_network(priv);
lbs_add_rtap(priv);
}
priv->monitormode = monitor_mode;
}
else {
if (priv->monitormode == LBS_MONITOR_OFF)
return strlen(buf);
priv->monitormode = LBS_MONITOR_OFF;
lbs_remove_rtap(priv);
if (priv->currenttxskb) {
dev_kfree_skb_any(priv->currenttxskb);
priv->currenttxskb = NULL;
}
/* Wake queues, command thread, etc. */
lbs_host_to_card_done(priv);
}
lbs_prepare_and_send_command(priv,
CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
CMD_OPTION_WAITFORRSP, 0, &priv->monitormode);
return strlen(buf);
}
/**
* lbs_rtap attribute to be exported per mshX interface
* through sysfs (/sys/class/net/mshX/libertas-rtap)
*/
static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get,
lbs_rtap_set );
/**
* anycast_mask attribute to be exported per mshX interface
* through sysfs (/sys/class/net/mshX/anycast_mask)
*/
static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set);
static ssize_t lbs_autostart_enabled_get(struct device *dev,
struct device_attribute *attr, char * buf)
{
struct cmd_ds_mesh_access mesh_access;
memset(&mesh_access, 0, sizeof(mesh_access));
lbs_prepare_and_send_command(to_net_dev(dev)->priv,
CMD_MESH_ACCESS,
CMD_ACT_MESH_GET_AUTOSTART_ENABLED,
CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
return sprintf(buf, "%d\n", le32_to_cpu(mesh_access.data[0]));
}
static ssize_t lbs_autostart_enabled_set(struct device *dev,
struct device_attribute *attr, const char * buf, size_t count)
{
struct cmd_ds_mesh_access mesh_access;
uint32_t datum;
struct lbs_private *priv = (to_net_dev(dev))->priv;
int ret;
memset(&mesh_access, 0, sizeof(mesh_access));
sscanf(buf, "%d", &datum);
mesh_access.data[0] = cpu_to_le32(datum);
ret = lbs_prepare_and_send_command(priv,
CMD_MESH_ACCESS,
CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
if (ret == 0)
priv->mesh_autostart_enabled = datum ? 1 : 0;
return strlen(buf);
}
static DEVICE_ATTR(autostart_enabled, 0644,
lbs_autostart_enabled_get, lbs_autostart_enabled_set);
static struct attribute *lbs_mesh_sysfs_entries[] = {
&dev_attr_anycast_mask.attr,
&dev_attr_autostart_enabled.attr,
NULL,
};
static struct attribute_group lbs_mesh_attr_group = {
.attrs = lbs_mesh_sysfs_entries,
};
/**
* @brief Check if the device can be open and wait if necessary.
*
* @param dev A pointer to net_device structure
* @return 0
*
* For USB adapter, on some systems the device open handler will be
* called before FW ready. Use the following flag check and wait
* function to work around the issue.
*
*/
static int pre_open_check(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv;
int i = 0;
while (!priv->fw_ready && i < 20) {
i++;
msleep_interruptible(100);
}
if (!priv->fw_ready) {
lbs_pr_err("firmware not ready\n");
return -1;
}
return 0;
}
/**
* @brief This function opens the device
*
* @param dev A pointer to net_device structure
* @return 0
*/
static int lbs_dev_open(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv;
lbs_deb_enter(LBS_DEB_NET);
priv->open = 1;
if (priv->connect_status == LBS_CONNECTED)
netif_carrier_on(priv->dev);
else
netif_carrier_off(priv->dev);
if (priv->mesh_dev) {
if (priv->mesh_connect_status == LBS_CONNECTED)
netif_carrier_on(priv->mesh_dev);
else
netif_carrier_off(priv->mesh_dev);
}
lbs_deb_leave(LBS_DEB_NET);
return 0;
}
/**
* @brief This function opens the mshX interface
*
* @param dev A pointer to net_device structure
* @return 0
*/
static int lbs_mesh_open(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv ;
if (pre_open_check(dev) == -1)
return -1;
priv->mesh_open = 1 ;
netif_wake_queue(priv->mesh_dev);
priv->mesh_connect_status = LBS_CONNECTED;
netif_carrier_on(priv->mesh_dev);
netif_wake_queue(priv->mesh_dev);
if (priv->infra_open == 0)
return lbs_dev_open(priv->dev) ;
return 0;
}
/**
* @brief This function opens the ethX interface
*
* @param dev A pointer to net_device structure
* @return 0
*/
static int lbs_open(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv ;
if(pre_open_check(dev) == -1)
return -1;
priv->infra_open = 1 ;
netif_wake_queue(priv->dev);
if (priv->open == 0)
return lbs_dev_open(priv->dev) ;
return 0;
}
static int lbs_dev_close(struct net_device *dev)
{
struct lbs_private *priv = dev->priv;
lbs_deb_enter(LBS_DEB_NET);
netif_carrier_off(priv->dev);
priv->open = 0;
lbs_deb_leave(LBS_DEB_NET);
return 0;
}
/**
* @brief This function closes the mshX interface
*
* @param dev A pointer to net_device structure
* @return 0
*/
static int lbs_mesh_close(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) (dev->priv);
priv->mesh_open = 0;
netif_stop_queue(priv->mesh_dev);
if (priv->infra_open == 0)
return lbs_dev_close(dev);
else
return 0;
}
/**
* @brief This function closes the ethX interface
*
* @param dev A pointer to net_device structure
* @return 0
*/
static int lbs_close(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv;
netif_stop_queue(dev);
priv->infra_open = 0;
if (priv->mesh_open == 0)
return lbs_dev_close(dev);
else
return 0;
}
static void lbs_tx_timeout(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv;
lbs_deb_enter(LBS_DEB_TX);
lbs_pr_err("tx watch dog timeout\n");
dev->trans_start = jiffies;
if (priv->currenttxskb) {
priv->eventcause = 0x01000000;
lbs_send_tx_feedback(priv);
}
/* XX: Shouldn't we also call into the hw-specific driver
to kick it somehow? */
lbs_host_to_card_done(priv);
lbs_deb_leave(LBS_DEB_TX);
}
void lbs_host_to_card_done(struct lbs_private *priv)
{
unsigned long flags;
spin_lock_irqsave(&priv->driver_lock, flags);
priv->dnld_sent = DNLD_RES_RECEIVED;
/* Wake main thread if commands are pending */
if (!priv->cur_cmd)
wake_up_interruptible(&priv->waitq);
/* Don't wake netif queues if we're in monitor mode and
a TX packet is already pending, or if there are commands
queued to be sent. */
if (!priv->currenttxskb && list_empty(&priv->cmdpendingq)) {
if (priv->dev && 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_irqrestore(&priv->driver_lock, flags);
}
EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
/**
* @brief This function returns the network statistics
*
* @param dev A pointer to struct lbs_private structure
* @return A pointer to net_device_stats structure
*/
static struct net_device_stats *lbs_get_stats(struct net_device *dev)
{
struct lbs_private *priv = (struct lbs_private *) dev->priv;
return &priv->stats;
}
static int lbs_set_mac_address(struct net_device *dev, void *addr)
{
int ret = 0;
struct lbs_private *priv = (struct lbs_private *) dev->priv;
struct sockaddr *phwaddr = addr;
lbs_deb_enter(LBS_DEB_NET);
/* In case it was called from the mesh device */
dev = priv->dev ;
memset(priv->current_addr, 0, ETH_ALEN);
/* dev->dev_addr is 8 bytes */
lbs_deb_hex(LBS_DEB_NET, "dev->dev_addr", dev->dev_addr, ETH_ALEN);
lbs_deb_hex(LBS_DEB_NET, "addr", phwaddr->sa_data, ETH_ALEN);
memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
ret = lbs_prepare_and_send_command(priv, CMD_802_11_MAC_ADDRESS,
CMD_ACT_SET,
CMD_OPTION_WAITFORRSP, 0, NULL);
if (ret) {
lbs_deb_net("set MAC address failed\n");
ret = -1;
goto done;
}
lbs_deb_hex(LBS_DEB_NET, "priv->macaddr", priv->current_addr, ETH_ALEN);
memcpy(dev->dev_addr, priv->current_addr, ETH_ALEN);
if (priv->mesh_dev)
memcpy(priv->mesh_dev->dev_addr, priv->current_addr, ETH_ALEN);
done:
lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
return ret;
}
static int lbs_copy_multicast_address(struct lbs_private *priv,
struct net_device *dev)
{
int i = 0;
struct dev_mc_list *mcptr = dev->mc_list;
for (i = 0; i < dev->mc_count; i++) {
memcpy(&priv->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
mcptr = mcptr->next;
}
return i;
}
static void lbs_set_multicast_list(struct net_device *dev)
{
struct lbs_private *priv = dev->priv;
int oldpacketfilter;
DECLARE_MAC_BUF(mac);
lbs_deb_enter(LBS_DEB_NET);
oldpacketfilter = priv->currentpacketfilter;
if (dev->flags & IFF_PROMISC) {
lbs_deb_net("enable promiscuous mode\n");
priv->currentpacketfilter |=
CMD_ACT_MAC_PROMISCUOUS_ENABLE;
priv->currentpacketfilter &=
~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
CMD_ACT_MAC_MULTICAST_ENABLE);
} else {
/* Multicast */
priv->currentpacketfilter &=
~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
if (dev->flags & IFF_ALLMULTI || dev->mc_count >
MRVDRV_MAX_MULTICAST_LIST_SIZE) {
lbs_deb_net( "enabling all multicast\n");
priv->currentpacketfilter |=
CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
priv->currentpacketfilter &=
~CMD_ACT_MAC_MULTICAST_ENABLE;
} else {
priv->currentpacketfilter &=
~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
if (!dev->mc_count) {
lbs_deb_net("no multicast addresses, "
"disabling multicast\n");
priv->currentpacketfilter &=
~CMD_ACT_MAC_MULTICAST_ENABLE;
} else {
int i;
priv->currentpacketfilter |=
CMD_ACT_MAC_MULTICAST_ENABLE;
priv->nr_of_multicastmacaddr =
lbs_copy_multicast_address(priv, dev);
lbs_deb_net("multicast addresses: %d\n",
dev->mc_count);
for (i = 0; i < dev->mc_count; i++) {
lbs_deb_net("Multicast address %d:%s\n",
i, print_mac(mac,
priv->multicastlist[i]));
}
/* send multicast addresses to firmware */
lbs_prepare_and_send_command(priv,
CMD_MAC_MULTICAST_ADR,
CMD_ACT_SET, 0, 0,
NULL);
}
}
}
if (priv->currentpacketfilter != oldpacketfilter) {
lbs_set_mac_packet_filter(priv);
}
lbs_deb_leave(LBS_DEB_NET);
}
/**
* @brief This function handles the major jobs in the LBS driver.
* It handles all events generated by firmware, RX data received
* from firmware and TX data sent from kernel.
*
* @param data A pointer to lbs_thread structure
* @return 0
*/
static int lbs_thread(void *data)
{
struct net_device *dev = data;
struct lbs_private *priv = dev->priv;
wait_queue_t wait;
u8 ireg = 0;
lbs_deb_enter(LBS_DEB_THREAD);
init_waitqueue_entry(&wait, current);
set_freezable();
for (;;) {
int shouldsleep;
lbs_deb_thread( "main-thread 111: intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
add_wait_queue(&priv->waitq, &wait);
set_current_state(TASK_INTERRUPTIBLE);
spin_lock_irq(&priv->driver_lock);
if (priv->surpriseremoved)
shouldsleep = 0; /* Bye */
else if (priv->psstate == PS_STATE_SLEEP)
shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */
else if (priv->intcounter)
shouldsleep = 0; /* Interrupt pending. Deal with it now */
else if (priv->dnld_sent)
shouldsleep = 1; /* Something is en route to the device already */
else if (priv->tx_pending_len > 0)
shouldsleep = 0; /* We've a packet to send */
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 */
else
shouldsleep = 1; /* No command */
if (shouldsleep) {
lbs_deb_thread("main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
priv->connect_status, priv->intcounter,
priv->psmode, priv->psstate);
spin_unlock_irq(&priv->driver_lock);
schedule();
} else
spin_unlock_irq(&priv->driver_lock);
lbs_deb_thread("main-thread 222 (waking up): intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
set_current_state(TASK_RUNNING);
remove_wait_queue(&priv->waitq, &wait);
try_to_freeze();
lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
if (kthread_should_stop() || priv->surpriseremoved) {
lbs_deb_thread("main-thread: break from main thread: surpriseremoved=0x%x\n",
priv->surpriseremoved);
break;
}
spin_lock_irq(&priv->driver_lock);
if (priv->intcounter) {
u8 int_status;
priv->intcounter = 0;
int_status = priv->hw_get_int_status(priv, &ireg);
if (int_status) {
lbs_deb_thread("main-thread: reading HOST_INT_STATUS_REG failed\n");
spin_unlock_irq(&priv->driver_lock);
continue;
}
priv->hisregcpy |= ireg;
}
lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
/* command response? */
if (priv->hisregcpy & MRVDRV_CMD_UPLD_RDY) {
lbs_deb_thread("main-thread: cmd response ready\n");
priv->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
spin_unlock_irq(&priv->driver_lock);
lbs_process_rx_command(priv);
spin_lock_irq(&priv->driver_lock);
}
/* Any Card Event */
if (priv->hisregcpy & MRVDRV_CARDEVENT) {
lbs_deb_thread("main-thread: Card Event Activity\n");
priv->hisregcpy &= ~MRVDRV_CARDEVENT;
if (priv->hw_read_event_cause(priv)) {
lbs_pr_alert("main-thread: hw_read_event_cause failed\n");
spin_unlock_irq(&priv->driver_lock);
continue;
}
spin_unlock_irq(&priv->driver_lock);
lbs_process_event(priv);
} else
spin_unlock_irq(&priv->driver_lock);
/* Check if we need to confirm Sleep Request received previously */
if (priv->psstate == PS_STATE_PRE_SLEEP &&
!priv->dnld_sent && !priv->cur_cmd) {
if (priv->connect_status == LBS_CONNECTED) {
lbs_deb_thread("main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p dnld_sent=%d cur_cmd=%p, confirm now\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent, priv->cur_cmd);
lbs_ps_confirm_sleep(priv, (u16) priv->psmode);
} else {
/* workaround for firmware sending
* deauth/linkloss event immediately
* after sleep request; remove this
* after firmware fixes it
*/
priv->psstate = PS_STATE_AWAKE;
lbs_pr_alert("main-thread: ignore PS_SleepConfirm in non-connected state\n");
}
}
/* The PS state is changed during processing of Sleep Request
* event above
*/
if ((priv->psstate == PS_STATE_SLEEP) ||
(priv->psstate == PS_STATE_PRE_SLEEP))
continue;
/* Execute the next command */
if (!priv->dnld_sent && !priv->cur_cmd)
lbs_execute_next_command(priv);
/* Wake-up command waiters which can't sleep in
* lbs_prepare_and_send_command
*/
if (!list_empty(&priv->cmdpendingq))
wake_up_all(&priv->cmd_pending);
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);
}
del_timer(&priv->command_timer);
wake_up_all(&priv->cmd_pending);
lbs_deb_leave(LBS_DEB_THREAD);
return 0;
}
/**
* @brief This function downloads firmware image, gets
* HW spec from firmware and set basic parameters to
* firmware.
*
* @param priv A pointer to struct lbs_private structure
* @return 0 or -1
*/
static int lbs_setup_firmware(struct lbs_private *priv)
{
int ret = -1;
struct cmd_ds_mesh_access mesh_access;
lbs_deb_enter(LBS_DEB_FW);
/*
* Read MAC address from HW
*/
memset(priv->current_addr, 0xff, ETH_ALEN);
ret = lbs_prepare_and_send_command(priv, CMD_GET_HW_SPEC,
0, CMD_OPTION_WAITFORRSP, 0, NULL);
if (ret) {
ret = -1;
goto done;
}
lbs_set_mac_packet_filter(priv);
/* Get the supported Data rates */
ret = lbs_prepare_and_send_command(priv, CMD_802_11_DATA_RATE,
CMD_ACT_GET_TX_RATE,
CMD_OPTION_WAITFORRSP, 0, NULL);
if (ret) {
ret = -1;
goto done;
}
/* Disable mesh autostart */
if (priv->mesh_dev) {
memset(&mesh_access, 0, sizeof(mesh_access));
mesh_access.data[0] = cpu_to_le32(0);
ret = lbs_prepare_and_send_command(priv,
CMD_MESH_ACCESS,
CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
if (ret) {
ret = -1;
goto done;
}
priv->mesh_autostart_enabled = 0;
}
ret = 0;
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)
{
struct lbs_private *priv = (struct lbs_private *)data;
struct cmd_ctrl_node *ptempnode;
struct cmd_ds_command *cmd;
unsigned long flags;
ptempnode = priv->cur_cmd;
if (ptempnode == NULL) {
lbs_deb_fw("ptempnode empty\n");
return;
}
cmd = (struct cmd_ds_command *)ptempnode->bufvirtualaddr;
if (!cmd) {
lbs_deb_fw("cmd is NULL\n");
return;
}
lbs_deb_fw("command_timer_fn fired, cmd %x\n", cmd->command);
if (!priv->fw_ready)
return;
spin_lock_irqsave(&priv->driver_lock, flags);
priv->cur_cmd = NULL;
spin_unlock_irqrestore(&priv->driver_lock, flags);
lbs_deb_fw("re-sending same command because of timeout\n");
lbs_queue_cmd(priv, ptempnode, 0);
wake_up_interruptible(&priv->waitq);
return;
}
static int lbs_init_adapter(struct lbs_private *priv)
{
size_t bufsize;
int i, ret = 0;
/* Allocate buffer to store the BSSID list */
bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
priv->networks = kzalloc(bufsize, GFP_KERNEL);
if (!priv->networks) {
lbs_pr_err("Out of memory allocating beacons\n");
ret = -1;
goto out;
}
/* Initialize scan result lists */
INIT_LIST_HEAD(&priv->network_free_list);
INIT_LIST_HEAD(&priv->network_list);
for (i = 0; i < MAX_NETWORK_COUNT; i++) {
list_add_tail(&priv->networks[i].list,
&priv->network_free_list);
}
priv->lbs_ps_confirm_sleep.seqnum = cpu_to_le16(++priv->seqnum);
priv->lbs_ps_confirm_sleep.command =
cpu_to_le16(CMD_802_11_PS_MODE);
priv->lbs_ps_confirm_sleep.size =
cpu_to_le16(sizeof(struct PS_CMD_ConfirmSleep));
priv->lbs_ps_confirm_sleep.action =
cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
memset(priv->current_addr, 0xff, ETH_ALEN);
priv->connect_status = LBS_DISCONNECTED;
priv->mesh_connect_status = LBS_DISCONNECTED;
priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
priv->mode = IW_MODE_INFRA;
priv->curbssparams.channel = DEFAULT_AD_HOC_CHANNEL;
priv->currentpacketfilter = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
priv->radioon = RADIO_ON;
priv->auto_rate = 1;
priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
priv->psmode = LBS802_11POWERMODECAM;
priv->psstate = PS_STATE_FULL_POWER;
mutex_init(&priv->lock);
setup_timer(&priv->command_timer, command_timer_fn,
(unsigned long)priv);
INIT_LIST_HEAD(&priv->cmdfreeq);
INIT_LIST_HEAD(&priv->cmdpendingq);
spin_lock_init(&priv->driver_lock);
init_waitqueue_head(&priv->cmd_pending);
/* Allocate the command buffers */
if (lbs_allocate_cmd_buffer(priv)) {
lbs_pr_err("Out of memory allocating command buffers\n");
ret = -1;
}
out:
return ret;
}
static void lbs_free_adapter(struct lbs_private *priv)
{
lbs_deb_fw("free command buffer\n");
lbs_free_cmd_buffer(priv);
lbs_deb_fw("free command_timer\n");
del_timer(&priv->command_timer);
lbs_deb_fw("free scan results table\n");
kfree(priv->networks);
priv->networks = NULL;
}
/**
* @brief This function adds the card. it will probe the
* card, allocate the lbs_priv and initialize the device.
*
* @param card A pointer to card
* @return A pointer to struct lbs_private structure
*/
struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
{
struct net_device *dev = NULL;
struct lbs_private *priv = NULL;
lbs_deb_enter(LBS_DEB_NET);
/* Allocate an Ethernet device and register it */
dev = alloc_etherdev(sizeof(struct lbs_private));
if (!dev) {
lbs_pr_err("init ethX device failed\n");
goto done;
}
priv = dev->priv;
if (lbs_init_adapter(priv)) {
lbs_pr_err("failed to initialize adapter structure.\n");
goto err_init_adapter;
}
priv->dev = dev;
priv->card = card;
priv->mesh_open = 0;
priv->infra_open = 0;
/* Setup the OS Interface to our functions */
dev->open = lbs_open;
dev->hard_start_xmit = lbs_hard_start_xmit;
dev->stop = lbs_close;
dev->set_mac_address = lbs_set_mac_address;
dev->tx_timeout = lbs_tx_timeout;
dev->get_stats = lbs_get_stats;
dev->watchdog_timeo = 5 * HZ;
dev->ethtool_ops = &lbs_ethtool_ops;
#ifdef WIRELESS_EXT
dev->wireless_handlers = (struct iw_handler_def *)&lbs_handler_def;
#endif
dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
dev->set_multicast_list = lbs_set_multicast_list;
SET_NETDEV_DEV(dev, dmdev);
priv->rtap_net_dev = NULL;
lbs_deb_thread("Starting main thread...\n");
init_waitqueue_head(&priv->waitq);
priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
if (IS_ERR(priv->main_thread)) {
lbs_deb_thread("Error creating main thread.\n");
goto err_init_adapter;
}
priv->work_thread = create_singlethread_workqueue("lbs_worker");
INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
INIT_WORK(&priv->sync_channel, lbs_sync_channel);
goto done;
err_init_adapter:
lbs_free_adapter(priv);
free_netdev(dev);
priv = NULL;
done:
lbs_deb_leave_args(LBS_DEB_NET, "priv %p", priv);
return priv;
}
EXPORT_SYMBOL_GPL(lbs_add_card);
int lbs_remove_card(struct lbs_private *priv)
{
struct net_device *dev = priv->dev;
union iwreq_data wrqu;
lbs_deb_enter(LBS_DEB_MAIN);
lbs_remove_rtap(priv);
dev = priv->dev;
device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
cancel_delayed_work(&priv->scan_work);
cancel_delayed_work(&priv->assoc_work);
destroy_workqueue(priv->work_thread);
if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
priv->psmode = LBS802_11POWERMODECAM;
lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
}
memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
/* Stop the thread servicing the interrupts */
priv->surpriseremoved = 1;
kthread_stop(priv->main_thread);
lbs_free_adapter(priv);
priv->dev = NULL;
free_netdev(dev);
lbs_deb_leave(LBS_DEB_MAIN);
return 0;
}
EXPORT_SYMBOL_GPL(lbs_remove_card);
int lbs_start_card(struct lbs_private *priv)
{
struct net_device *dev = priv->dev;
int ret = -1;
lbs_deb_enter(LBS_DEB_MAIN);
/* poke the firmware */
ret = lbs_setup_firmware(priv);
if (ret)
goto done;
/* init 802.11d */
lbs_init_11d(priv);
if (register_netdev(dev)) {
lbs_pr_err("cannot register ethX device\n");
goto done;
}
if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
lbs_pr_err("cannot register lbs_rtap attribute\n");
lbs_debugfs_init_one(priv, dev);
lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
ret = 0;
done:
lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
return ret;
}
EXPORT_SYMBOL_GPL(lbs_start_card);
int lbs_stop_card(struct lbs_private *priv)
{
struct net_device *dev = priv->dev;
int ret = -1;
struct cmd_ctrl_node *cmdnode;
unsigned long flags;
lbs_deb_enter(LBS_DEB_MAIN);
netif_stop_queue(priv->dev);
netif_carrier_off(priv->dev);
lbs_debugfs_remove_one(priv);
/* Flush pending command nodes */
spin_lock_irqsave(&priv->driver_lock, flags);
list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
cmdnode->cmdwaitqwoken = 1;
wake_up_interruptible(&cmdnode->cmdwait_q);
}
spin_unlock_irqrestore(&priv->driver_lock, flags);
unregister_netdev(dev);
lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
return ret;
}
EXPORT_SYMBOL_GPL(lbs_stop_card);
/**
* @brief This function adds mshX interface
*
* @param priv A pointer to the struct lbs_private structure
* @return 0 if successful, -X otherwise
*/
int lbs_add_mesh(struct lbs_private *priv, struct device *dev)
{
struct net_device *mesh_dev = NULL;
int ret = 0;
lbs_deb_enter(LBS_DEB_MESH);
/* Allocate a virtual mesh device */
if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
lbs_deb_mesh("init mshX device failed\n");
ret = -ENOMEM;
goto done;
}
mesh_dev->priv = priv;
priv->mesh_dev = mesh_dev;
mesh_dev->open = lbs_mesh_open;
mesh_dev->hard_start_xmit = lbs_hard_start_xmit;
mesh_dev->stop = lbs_mesh_close;
mesh_dev->get_stats = lbs_get_stats;
mesh_dev->set_mac_address = lbs_set_mac_address;
mesh_dev->ethtool_ops = &lbs_ethtool_ops;
memcpy(mesh_dev->dev_addr, priv->dev->dev_addr,
sizeof(priv->dev->dev_addr));
SET_NETDEV_DEV(priv->mesh_dev, dev);
#ifdef WIRELESS_EXT
mesh_dev->wireless_handlers = (struct iw_handler_def *)&mesh_handler_def;
#endif
/* Register virtual mesh interface */
ret = register_netdev(mesh_dev);
if (ret) {
lbs_pr_err("cannot register mshX virtual interface\n");
goto err_free;
}
ret = sysfs_create_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
if (ret)
goto err_unregister;
/* Everything successful */
ret = 0;
goto done;
err_unregister:
unregister_netdev(mesh_dev);
err_free:
free_netdev(mesh_dev);
done:
lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
return ret;
}
EXPORT_SYMBOL_GPL(lbs_add_mesh);
void lbs_remove_mesh(struct lbs_private *priv)
{
struct net_device *mesh_dev;
lbs_deb_enter(LBS_DEB_MAIN);
if (!priv)
goto out;
mesh_dev = priv->mesh_dev;
netif_stop_queue(mesh_dev);
netif_carrier_off(priv->mesh_dev);
sysfs_remove_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
unregister_netdev(mesh_dev);
priv->mesh_dev = NULL ;
free_netdev(mesh_dev);
out:
lbs_deb_leave(LBS_DEB_MAIN);
}
EXPORT_SYMBOL_GPL(lbs_remove_mesh);
/**
* @brief This function finds the CFP in
* region_cfp_table based on region and band parameter.
*
* @param region The region code
* @param band The band
* @param cfp_no A pointer to CFP number
* @return A pointer to CFP
*/
struct chan_freq_power *lbs_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
{
int i, end;
lbs_deb_enter(LBS_DEB_MAIN);
end = ARRAY_SIZE(region_cfp_table);
for (i = 0; i < end ; i++) {
lbs_deb_main("region_cfp_table[i].region=%d\n",
region_cfp_table[i].region);
if (region_cfp_table[i].region == region) {
*cfp_no = region_cfp_table[i].cfp_no_BG;
lbs_deb_leave(LBS_DEB_MAIN);
return region_cfp_table[i].cfp_BG;
}
}
lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL");
return NULL;
}
int lbs_set_regiontable(struct lbs_private *priv, u8 region, u8 band)
{
int ret = 0;
int i = 0;
struct chan_freq_power *cfp;
int cfp_no;
lbs_deb_enter(LBS_DEB_MAIN);
memset(priv->region_channel, 0, sizeof(priv->region_channel));
{
cfp = lbs_get_region_cfp_table(region, band, &cfp_no);
if (cfp != NULL) {
priv->region_channel[i].nrcfp = cfp_no;
priv->region_channel[i].CFP = cfp;
} else {
lbs_deb_main("wrong region code %#x in band B/G\n",
region);
ret = -1;
goto out;
}
priv->region_channel[i].valid = 1;
priv->region_channel[i].region = region;
priv->region_channel[i].band = band;
i++;
}
out:
lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
return ret;
}
/**
* @brief This function handles the interrupt. it will change PS
* state if applicable. it will wake up main_thread to handle
* the interrupt event as well.
*
* @param dev A pointer to net_device structure
* @return n/a
*/
void lbs_interrupt(struct net_device *dev)
{
struct lbs_private *priv = dev->priv;
lbs_deb_enter(LBS_DEB_THREAD);
lbs_deb_thread("lbs_interrupt: intcounter=%d\n",
priv->intcounter);
priv->intcounter++;
if (priv->psstate == PS_STATE_SLEEP) {
priv->psstate = PS_STATE_AWAKE;
netif_wake_queue(dev);
if (priv->mesh_dev)
netif_wake_queue(priv->mesh_dev);
}
wake_up_interruptible(&priv->waitq);
lbs_deb_leave(LBS_DEB_THREAD);
}
EXPORT_SYMBOL_GPL(lbs_interrupt);
int lbs_reset_device(struct lbs_private *priv)
{
int ret;
lbs_deb_enter(LBS_DEB_MAIN);
ret = lbs_prepare_and_send_command(priv, CMD_802_11_RESET,
CMD_ACT_HALT, 0, 0, NULL);
msleep_interruptible(10);
lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
return ret;
}
EXPORT_SYMBOL_GPL(lbs_reset_device);
static int __init lbs_init_module(void)
{
lbs_deb_enter(LBS_DEB_MAIN);
lbs_debugfs_init();
lbs_deb_leave(LBS_DEB_MAIN);
return 0;
}
static void __exit lbs_exit_module(void)
{
lbs_deb_enter(LBS_DEB_MAIN);
lbs_debugfs_remove();
lbs_deb_leave(LBS_DEB_MAIN);
}
/*
* rtap interface support fuctions
*/
static int lbs_rtap_open(struct net_device *dev)
{
netif_carrier_off(dev);
netif_stop_queue(dev);
return 0;
}
static int lbs_rtap_stop(struct net_device *dev)
{
return 0;
}
static int lbs_rtap_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
netif_stop_queue(dev);
return -EOPNOTSUPP;
}
static struct net_device_stats *lbs_rtap_get_stats(struct net_device *dev)
{
struct lbs_private *priv = dev->priv;
return &priv->stats;
}
void lbs_remove_rtap(struct lbs_private *priv)
{
if (priv->rtap_net_dev == NULL)
return;
unregister_netdev(priv->rtap_net_dev);
free_netdev(priv->rtap_net_dev);
priv->rtap_net_dev = NULL;
}
int lbs_add_rtap(struct lbs_private *priv)
{
int rc = 0;
struct net_device *rtap_dev;
if (priv->rtap_net_dev)
return -EPERM;
rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
if (rtap_dev == NULL)
return -ENOMEM;
memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
rtap_dev->open = lbs_rtap_open;
rtap_dev->stop = lbs_rtap_stop;
rtap_dev->get_stats = lbs_rtap_get_stats;
rtap_dev->hard_start_xmit = lbs_rtap_hard_start_xmit;
rtap_dev->set_multicast_list = lbs_set_multicast_list;
rtap_dev->priv = priv;
rc = register_netdev(rtap_dev);
if (rc) {
free_netdev(rtap_dev);
return rc;
}
priv->rtap_net_dev = rtap_dev;
return 0;
}
module_init(lbs_init_module);
module_exit(lbs_exit_module);
MODULE_DESCRIPTION("Libertas WLAN Driver Library");
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_LICENSE("GPL");
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