src/dhd/sys/dhd_linux.c

/*
 * Broadcom Dongle Host Driver (DHD), Linux-specific network interface
 * Basically selected code segments from usb-cdc.c and usb-rndis.c
 *
 * Copyright (C) 1999-2009, Broadcom Corporation
 * 
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 * 
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 * 
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 * $Id: dhd_linux.c,v 1.65.4.9.2.13.6.35 2009/04/30 00:02:55 Exp $
 */

#include <typedefs.h>
#include <linuxver.h>
#include <osl.h>

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/random.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/fcntl.h>
#include <linux/fs.h>

#include <asm/uaccess.h>
#include <asm/unaligned.h>

#include <epivers.h>
#include <bcmutils.h>
#include <bcmendian.h>

#include <proto/ethernet.h>
#include <dngl_stats.h>
#include <dhd.h>
#include <dhd_bus.h>
#include <dhd_proto.h>
#include <dhd_dbg.h>


#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
MODULE_LICENSE("GPL v2");
#endif /* LinuxVer */

#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 15)
const char *
print_tainted()
{
	return "";
}
#endif	/* LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 15) */

/* Linux wireless extension support */
#ifdef CONFIG_WIRELESS_EXT
#include <wl_iw.h>
#endif /* CONFIG_WIRELESS_EXT */

/* Interface control information */
typedef struct dhd_if {
	struct dhd_info *info;			/* back pointer to dhd_info */
	/* OS/stack specifics */
	struct net_device *net;
	struct net_device_stats stats;
	int 			idx;			/* iface idx in dongle */
	int 			state;			/* interface state */
	uint 			subunit;		/* subunit */
	bool			attached;		/* Delayed attachment when unset */
	bool			txflowcontrol;	/* Per interface flow control indicator */
	char			name[IFNAMSIZ+1]; /* linux interface name */
} dhd_if_t;

/* Local private structure (extension of pub) */
typedef struct dhd_info {
#ifdef CONFIG_WIRELESS_EXT
	wl_iw_t		iw;		/* wireless extensions state (must be first) */
#endif /* CONFIG_WIRELESS_EXT */

	dhd_pub_t pub;

	/* OS/stack specifics */
	dhd_if_t *iflist[DHD_MAX_IFS];

	struct semaphore proto_sem;
	wait_queue_head_t ioctl_resp_wait;
	struct timer_list timer;
	bool wd_timer_valid;
	struct tasklet_struct tasklet;
	spinlock_t	sdlock;
	spinlock_t	txqlock;
	/* Thread based operation */
	bool threads_only;
	struct semaphore sdsem;
	long watchdog_pid;
	struct semaphore watchdog_sem;
	struct completion watchdog_exited;
	long dpc_pid;
	struct semaphore dpc_sem;
	struct completion dpc_exited;

	/* Thread to work on multicast and multiple interfaces */
	long sysioc_pid;
	struct semaphore sysioc_sem;
	struct completion sysioc_exited;
	bool set_multicast;
	bool set_macaddress;
	struct ether_addr macvalue;
	atomic_t pend_8021x_cnt;
} dhd_info_t;

/* Definitions to provide path to the firmware and nvram
*  example nvram_path[MOD_PARAM_PATHLEN]="/projects/wlan/nvram.txt"
*/
char firmware_path[MOD_PARAM_PATHLEN];
char nvram_path[MOD_PARAM_PATHLEN];

/* load firmware and/or nvram values from the filesystem */
module_param_string(firmware_path, firmware_path, MOD_PARAM_PATHLEN, 0);
module_param_string(nvram_path, nvram_path, MOD_PARAM_PATHLEN, 0);

/* Error bits */
module_param(dhd_msg_level, int, 0);

/* Spawn a thread for system ioctls (set mac, set mcast) */
uint dhd_sysioc = TRUE;
module_param(dhd_sysioc, uint, 0);

/* Watchdog frequency */
uint dhd_watchdog_ms = 10;
module_param(dhd_watchdog_ms, uint, 0);

/* Watchdog thread priority, -1 to use kernel timer */
int dhd_watchdog_prio = 97;
module_param(dhd_watchdog_prio, int, 0);

/* DPC thread priority, -1 to use tasklet */
int dhd_dpc_prio = 98;
module_param(dhd_dpc_prio, int, 0);

/* DPC thread priority, -1 to use tasklet */
extern int dhd_dongle_memsize;
module_param(dhd_dongle_memsize, int, 0);

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
#define DAEMONIZE(a) daemonize(a); \
	allow_signal(SIGKILL); \
	allow_signal(SIGTERM);
#else /* Linux 2.4 (w/o preemption patch) */
#define RAISE_RX_SOFTIRQ() \
	cpu_raise_softirq(smp_processor_id(), NET_RX_SOFTIRQ)
#define DAEMONIZE(a) daemonize(); \
	do { if (a) \
		strncpy(current->comm, a, MIN(sizeof(current->comm), (strlen(a) + 1))); \
	} while (0);
#endif /* LINUX_VERSION_CODE  */

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
#define BLOCKABLE()	(!in_atomic())
#else
#define BLOCKABLE()	(!in_interrupt())
#endif

/* The following are specific to the SDIO dongle */

/* IOCTL response timeout */
int dhd_ioctl_timeout_msec = IOCTL_RESP_TIMEOUT;

/* Idle timeout for backplane clock */
int dhd_idletime = DHD_IDLETIME_TICKS;
module_param(dhd_idletime, int, 0);

/* Use polling */
uint dhd_poll = FALSE;
module_param(dhd_poll, uint, 0);

/* Use interrupts */
uint dhd_intr = TRUE;
module_param(dhd_intr, uint, 0);

/* SDIO Drive Strength (in milliamps) */
uint dhd_sdiod_drive_strength = 6;
module_param(dhd_sdiod_drive_strength, uint, 0);

/* Tx/Rx bounds */
extern uint dhd_txbound;
extern uint dhd_rxbound;
module_param(dhd_txbound, uint, 0);
module_param(dhd_rxbound, uint, 0);

/* Deferred transmits */
extern uint dhd_deferred_tx;
module_param(dhd_deferred_tx, uint, 0);



#ifdef SDTEST
/* Echo packet generator (pkts/s) */
uint dhd_pktgen = 0;
module_param(dhd_pktgen, uint, 0);

/* Echo packet len (0 => sawtooth, max 2040) */
uint dhd_pktgen_len = 0;
module_param(dhd_pktgen_len, uint, 0);
#endif

/* Version string to report */
#ifdef DHD_DEBUG
#define DHD_COMPILED "\nCompiled in " SRCBASE
#else
#define DHD_COMPILED
#endif

static char dhd_version[] = "Dongle Host Driver, version " EPI_VERSION_STR
#ifdef DHD_DEBUG
"\nCompiled in " SRCBASE " on " __DATE__ " at " __TIME__
#endif
;


#ifdef CONFIG_WIRELESS_EXT
struct iw_statistics *dhd_get_wireless_stats(struct net_device *dev);
#endif /* CONFIG_WIRELESS_EXT */

static void dhd_dpc(ulong data);

#ifdef TOE
#ifndef BDC
#error TOE required BDC
#endif /* !BDC */
static int dhd_toe_get(dhd_info_t *dhd, int idx, uint32 *toe_ol);
static int dhd_toe_set(dhd_info_t *dhd, int idx, uint32 toe_ol);
#endif /* TOE */

static int dhd_wl_host_event(dhd_info_t *dhd, int *ifidx, void *pktdata,
	wl_event_msg_t *event_ptr, void **data_ptr);

int
dhd_net2idx(dhd_info_t *dhd, struct net_device *net)
{
	int i = 0;

	ASSERT(dhd);
	while (i < DHD_MAX_IFS) {
		if (dhd->iflist[i] && (dhd->iflist[i]->net == net))
			return i;
		i++;
	}

	return DHD_BAD_IF;
}

int
dhd_ifname2idx(dhd_info_t *dhd, char *name)
{
	int i = DHD_MAX_IFS;

	ASSERT(dhd);

	if (name == NULL || *name == '\0')
		return 0;

	while (--i > 0)
		if (dhd->iflist[i] && !strncmp(dhd->iflist[i]->name, name, IFNAMSIZ))
				break;

	DHD_TRACE(("%s: return idx %d for \"%s\"\n", __FUNCTION__, i, name));

	return i;	/* default - the primary interface */
}

char *
dhd_ifname(dhd_pub_t *dhdp, int ifidx)
{
	dhd_info_t *dhd = (dhd_info_t *)(dhdp->info);

	ASSERT(dhd && dhd->iflist[ifidx]);
	if (dhd && dhd->iflist[ifidx]->net)
		return dhd->iflist[ifidx]->net->name;
	return "<no ifname>";
}

static void
_dhd_set_multicast_list(dhd_info_t *dhd, int ifidx)
{
	struct net_device *dev;
	struct dev_mc_list *mclist;
	uint32 allmulti, cnt;

	wl_ioctl_t ioc;
	char *buf, *bufp;
	uint buflen;
	int ret;

	ASSERT(dhd && dhd->iflist[ifidx]);
	dev = dhd->iflist[ifidx]->net;
	mclist = dev->mc_list;
	cnt = dev->mc_count;

	/* Determine initial value of allmulti flag */
	allmulti = (dev->flags & IFF_ALLMULTI) ? TRUE : FALSE;

	/* Send down the multicast list first. */


	buflen = sizeof("mcast_list") + sizeof(cnt) + (cnt * ETHER_ADDR_LEN);
	if (!(bufp = buf = MALLOC(dhd->pub.osh, buflen))) {
		DHD_ERROR(("%s: out of memory for mcast_list, cnt %d\n",
		           dhd_ifname(&dhd->pub, ifidx), cnt));
		return;
	}

	strcpy(bufp, "mcast_list");
	bufp += strlen("mcast_list") + 1;

	cnt = htol32(cnt);
	memcpy(bufp, &cnt, sizeof(cnt));
	bufp += sizeof(cnt);

	for (cnt = 0; mclist && (cnt < dev->mc_count); cnt++, mclist = mclist->next) {
		memcpy(bufp, (void *)mclist->dmi_addr, ETHER_ADDR_LEN);
		bufp += ETHER_ADDR_LEN;
	}

	memset(&ioc, 0, sizeof(ioc));
	ioc.cmd = WLC_SET_VAR;
	ioc.buf = buf;
	ioc.len = buflen;
	ioc.set = TRUE;

	ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len);
	if (ret < 0) {
		DHD_ERROR(("%s: set mcast_list failed, cnt %d\n",
			dhd_ifname(&dhd->pub, ifidx), cnt));
		allmulti = cnt ? TRUE : allmulti;
	}

	MFREE(dhd->pub.osh, buf, buflen);

	/* Now send the allmulti setting.  This is based on the setting in the
	 * net_device flags, but might be modified above to be turned on if we
	 * were trying to set some addresses and dongle rejected it...
	 */

	buflen = sizeof("allmulti") + sizeof(allmulti);
	if (!(buf = MALLOC(dhd->pub.osh, buflen))) {
		DHD_ERROR(("%s: out of memory for allmulti\n", dhd_ifname(&dhd->pub, ifidx)));
		return;
	}
	allmulti = htol32(allmulti);

	if (!bcm_mkiovar("allmulti", (void*)&allmulti, sizeof(allmulti), buf, buflen)) {
		DHD_ERROR(("%s: mkiovar failed for allmulti, datalen %d buflen %u\n",
		           dhd_ifname(&dhd->pub, ifidx), (int)sizeof(allmulti), buflen));
		MFREE(dhd->pub.osh, buf, buflen);
		return;
	}


	memset(&ioc, 0, sizeof(ioc));
	ioc.cmd = WLC_SET_VAR;
	ioc.buf = buf;
	ioc.len = buflen;
	ioc.set = TRUE;

	ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len);
	if (ret < 0) {
		DHD_ERROR(("%s: set allmulti %d failed\n",
		           dhd_ifname(&dhd->pub, ifidx), ltoh32(allmulti)));
	}

	MFREE(dhd->pub.osh, buf, buflen);

	/* Finally, pick up the PROMISC flag as well, like the NIC driver does */

	allmulti = (dev->flags & IFF_PROMISC) ? TRUE : FALSE;
	allmulti = htol32(allmulti);

	memset(&ioc, 0, sizeof(ioc));
	ioc.cmd = WLC_SET_PROMISC;
	ioc.buf = &allmulti;
	ioc.len = sizeof(allmulti);
	ioc.set = TRUE;

	ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len);
	if (ret < 0) {
		DHD_ERROR(("%s: set promisc %d failed\n",
		           dhd_ifname(&dhd->pub, ifidx), ltoh32(allmulti)));
	}
}

static int
_dhd_set_mac_address(dhd_info_t *dhd, int ifidx, struct ether_addr *addr)
{
	char buf[32];
	wl_ioctl_t ioc;
	int ret;

	if (!bcm_mkiovar("cur_etheraddr", (char*)addr, ETHER_ADDR_LEN, buf, 32)) {
		DHD_ERROR(("%s: mkiovar failed for cur_etheraddr\n", dhd_ifname(&dhd->pub, ifidx)));
		return -1;
	}
	memset(&ioc, 0, sizeof(ioc));
	ioc.cmd = WLC_SET_VAR;
	ioc.buf = buf;
	ioc.len = 32;
	ioc.set = TRUE;

	ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len);
	if (ret < 0) {
		DHD_ERROR(("%s: set cur_etheraddr failed\n", dhd_ifname(&dhd->pub, ifidx)));
	} else {
		memcpy(dhd->iflist[ifidx]->net->dev_addr, addr, ETHER_ADDR_LEN);
	}

	return ret;
}

static void
dhd_op_if(dhd_if_t *ifp)
{
	dhd_info_t	*dhd;
	int			ret = 0;

	ASSERT(ifp && ifp->info && ifp->idx);

	dhd = ifp->info;

	DHD_TRACE(("%s: idx %d, state %d\n", __FUNCTION__, ifp->idx, ifp->state));

	switch (ifp->state) {
	case WLC_E_IF_ADD:
		if (ifp->net != NULL) {
			netif_stop_queue(ifp->net);
			unregister_netdev(ifp->net);
			free_netdev(ifp->net);
		}
		/* Allocate etherdev, including space for private structure */
		if (!(ifp->net = alloc_etherdev(0))) {
			DHD_ERROR(("%s: OOM - alloc_etherdev\n", __FUNCTION__));
			ret = -ENOMEM;
		}
		if (ret == 0) {
			strcpy(ifp->net->name, ifp->name);
			ifp->net->priv = dhd;
			if (dhd_net_attach(&dhd->pub, ifp->idx) != 0) {
				DHD_ERROR(("%s: dhd_net_attach failed\n", __FUNCTION__));
				ret = -EOPNOTSUPP;
			} else
				ifp->state = 0;
		}
		break;
	case WLC_E_IF_DEL:
		if (ifp->net != NULL) {
			netif_stop_queue(ifp->net);
			unregister_netdev(ifp->net);
			ret = DHD_DEL_IF;	/* Make sure the free_netdev() is called */
		}
		break;
	default:
		DHD_ERROR(("%s: bad op %d\n", __FUNCTION__, ifp->state));
		ASSERT(!ifp->state);
		break;
	}

	if (ret < 0) {
		if (ifp->net)
			free_netdev(ifp->net);
		dhd->iflist[ifp->idx] = NULL;
		MFREE(dhd->pub.osh, ifp, sizeof(*ifp));
	}
}

static int
_dhd_sysioc_thread(void *data)
{
	dhd_info_t *dhd = (dhd_info_t *)data;
	int i;

	DAEMONIZE("dhd_sysioc");

	while (down_interruptible(&dhd->sysioc_sem) == 0) {
		for (i = 0; i < DHD_MAX_IFS; i++) {
			if (dhd->iflist[i]) {
				if (dhd->iflist[i]->state)
					dhd_op_if(dhd->iflist[i]);
				if (dhd->set_multicast) {
					dhd->set_multicast = FALSE;
					_dhd_set_multicast_list(dhd, i);
				}
				if (dhd->set_macaddress) {
					dhd->set_macaddress = FALSE;
					_dhd_set_mac_address(dhd, i, &dhd->macvalue);
				}
			}
		}
	}
	complete_and_exit(&dhd->sysioc_exited, 0);
}

static int
dhd_set_mac_address(struct net_device *dev, void *addr)
{
	int ret = 0;

	dhd_info_t *dhd = (dhd_info_t *)dev->priv;
	struct sockaddr *sa = (struct sockaddr *)addr;
	int ifidx;

	ifidx = dhd_net2idx(dhd, dev);
	if (ifidx == DHD_BAD_IF)
		return -1;

	memcpy(&dhd->macvalue, sa->sa_data, ETHER_ADDR_LEN);
	if (BLOCKABLE()) {
		dhd->set_macaddress = FALSE;
		ret = _dhd_set_mac_address(dhd, ifidx, &dhd->macvalue);
	} else if (dhd->sysioc_pid >= 0) {
		dhd->set_macaddress = TRUE;
		up(&dhd->sysioc_sem);
	} else {
		DHD_ERROR(("%s: non-blockable with no sysioc thread\n", __FUNCTION__));
	}
	return ret;
}

static void
dhd_set_multicast_list(struct net_device *dev)
{
	dhd_info_t *dhd = (dhd_info_t *)dev->priv;
	int ifidx;

	ifidx = dhd_net2idx(dhd, dev);
	if (ifidx == DHD_BAD_IF)
		return;

	if (BLOCKABLE()) {
		dhd->set_multicast = FALSE;
		_dhd_set_multicast_list(dhd, ifidx);
	} else if (dhd->sysioc_pid >= 0) {
		dhd->set_multicast = TRUE;
		up(&dhd->sysioc_sem);
	} else {
		DHD_ERROR(("%s: non-blockable with no sysioc thread\n", __FUNCTION__));
	}
}

int
dhd_sendpkt(dhd_pub_t *dhdp, uint ifidx, void *pktbuf)
{
	int ret;
	dhd_info_t *dhd = (dhd_info_t *)(dhdp->info);

	/* Reject if down */
	if (!dhdp->up || (dhdp->busstate == DHD_BUS_DOWN)) {
		return -ENODEV;
	}

	/* Update multicast statistic */
	if (PKTLEN(dhdp->osh, pktbuf) >= ETHER_ADDR_LEN) {
		uint8 *pktdata = (uint8 *)PKTDATA(dhdp->osh, pktbuf);
		struct ether_header *eh = (struct ether_header *)pktdata;

		if (ETHER_ISMULTI(eh->ether_dhost))
			dhdp->tx_multicast++;
		if (ntoh16(eh->ether_type) == ETHER_TYPE_802_1X)
			atomic_inc(&dhd->pend_8021x_cnt);
	}

	/* Look into the packet and update the packet priority */
	pktsetprio(pktbuf, FALSE);

	/* If the protocol uses a data header, apply it */
	dhd_prot_hdrpush(dhdp, ifidx, pktbuf);

	/* Use bus module to send data frame */
#ifdef BCMDBUS
	ret = dbus_send_pkt(dhdp->dbus, pktbuf, NULL /* pktinfo */);
#else
	ret = dhd_bus_txdata(dhdp->bus, pktbuf);
#endif /* BCMDBUS */

	return ret;
}

static int
dhd_start_xmit(struct sk_buff *skb, struct net_device *net)
{
	int ret;
	void *pktbuf;
	dhd_info_t *dhd = (dhd_info_t *)net->priv;
	int ifidx;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	/* Reject if down */
	if (!dhd->pub.up || (dhd->pub.busstate == DHD_BUS_DOWN)) {
		return -ENODEV;
	}

	ifidx = dhd_net2idx(dhd, net);
	if (ifidx == DHD_BAD_IF) {
		DHD_ERROR(("%s: bad ifidx %d\n", __FUNCTION__, ifidx));
		return -ENODEV;
	}

	/* Make sure there's enough room for any header */
	if (skb_headroom(skb) < dhd->pub.hdrlen) {
		struct sk_buff *skb2;

		DHD_INFO(("%s: insufficient headroom\n",
		          dhd_ifname(&dhd->pub, ifidx)));
		dhd->pub.tx_realloc++;
		skb2 = skb_realloc_headroom(skb, dhd->pub.hdrlen);
		dev_kfree_skb(skb);
		if ((skb = skb2) == NULL) {
			DHD_ERROR(("%s: skb_realloc_headroom failed\n",
			           dhd_ifname(&dhd->pub, ifidx)));
			ret = -ENOMEM;
			goto done;
		}
	}

	/* Convert to packet */
	if (!(pktbuf = PKTFRMNATIVE(dhd->pub.osh, skb))) {
		DHD_ERROR(("%s: PKTFRMNATIVE failed\n",
		           dhd_ifname(&dhd->pub, ifidx)));
		dev_kfree_skb_any(skb);
		ret = -ENOMEM;
		goto done;
	}

	ret = dhd_sendpkt(&dhd->pub, ifidx, pktbuf);


done:
	if (ret)
		dhd->pub.dstats.tx_dropped++;
	else
		dhd->pub.tx_packets++;

	/* Return ok: we always eat the packet */
	return 0;
}

void
dhd_txflowcontrol(dhd_pub_t *dhdp, int ifidx, bool state)
{
	struct net_device *net;
	dhd_info_t *dhd = dhdp->info;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	dhdp->txoff = state;
	ASSERT(dhd && dhd->iflist[ifidx]);
	net = dhd->iflist[ifidx]->net;
	if (state == ON)
		netif_stop_queue(net);
	else
		netif_wake_queue(net);
}

void
dhd_rx_frame(dhd_pub_t *dhdp, int ifidx, void *pktbuf, int numpkt)
{
	dhd_info_t *dhd = (dhd_info_t *)(dhdp->info);
	struct sk_buff *skb;
	uchar *eth;
	uint len;
	void * data, *pnext, *save_pktbuf;
	int i;
	dhd_if_t *ifp;
	wl_event_msg_t event;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	save_pktbuf = pktbuf;

	for (i = 0; pktbuf && i < numpkt; i++, pktbuf = pnext) {

		pnext = PKTNEXT(dhdp->osh, pktbuf);
		PKTSETNEXT(wl->sh.osh, pktbuf, NULL);


		skb = PKTTONATIVE(dhdp->osh, pktbuf);

		/* Get the protocol, maintain skb around eth_type_trans()
		 * The main reason for this hack is for the limitation of
		 * Linux 2.4 where 'eth_type_trans' uses the 'net->hard_header_len'
		 * to perform skb_pull inside vs ETH_HLEN. Since to avoid
		 * coping of the packet coming from the network stack to add
		 * BDC, Hardware header etc, during network interface registration
		 * we set the 'net->hard_header_len' to ETH_HLEN + extra space required
		 * for BDC, Hardware header etc. and not just the ETH_HLEN
		 */
		eth = skb->data;
		len = skb->len;

		ifp = dhd->iflist[ifidx];
		if (ifp == NULL)
			ifp = dhd->iflist[0];

		ASSERT(ifp);
		skb->dev = ifp->net;
		skb->protocol = eth_type_trans(skb, skb->dev);

		if (skb->pkt_type == PACKET_MULTICAST) {
			dhd->pub.rx_multicast++;
		}

		skb->data = eth;
		skb->len = len;

		/* Strip header, count, deliver upward */
		skb_pull(skb, ETH_HLEN);

		/* Process special event packets and then discard them */
		if (ntoh16(skb->protocol) == ETHER_TYPE_BRCM)
			dhd_wl_host_event(dhd, &ifidx,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
			skb->mac_header,
#else
			skb->mac.raw,
#endif
			&event,
			&data);

		ASSERT(ifidx < DHD_MAX_IFS && dhd->iflist[ifidx]);
		if (dhd->iflist[ifidx])
			ifp = dhd->iflist[ifidx];

		ifp->net->last_rx = jiffies;
		dhdp->dstats.rx_bytes += skb->len;
		dhdp->rx_packets++; /* Local count */

		if (in_interrupt()) {
			netif_rx(skb);
		} else {
			/* If the receive is not processed inside an ISR,
			 * the softirqd must be woken explicitly to service
			 * the NET_RX_SOFTIRQ.  In 2.6 kernels, this is handled
			 * by netif_rx_ni(), but in earlier kernels, we need
			 * to do it manually.
			 */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
			netif_rx_ni(skb);
#else
			ulong flags;
			netif_rx(skb);
			local_irq_save(flags);
			RAISE_RX_SOFTIRQ();
			local_irq_restore(flags);
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) */
		}
	}
}

void
dhd_txcomplete(dhd_pub_t *dhdp, void *txp, bool success)
{
	uint ifidx;
	dhd_info_t *dhd = (dhd_info_t *)(dhdp->info);
	struct ether_header *eh;
	uint16 type;

	dhd_prot_hdrpull(dhdp, &ifidx, txp);

	eh = (struct ether_header *)PKTDATA(dhdp->osh, txp);
	type  = ntoh16(eh->ether_type);

	if (type == ETHER_TYPE_802_1X)
		atomic_dec(&dhd->pend_8021x_cnt);

}

static struct net_device_stats *
dhd_get_stats(struct net_device *net)
{
	dhd_info_t *dhd = (dhd_info_t *)net->priv;
	dhd_if_t *ifp;
	int ifidx;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	ifidx = dhd_net2idx(dhd, net);
	if (ifidx == DHD_BAD_IF)
		return NULL;

	ifp = dhd->iflist[ifidx];
	ASSERT(dhd && ifp);

	if (dhd->pub.up) {
		/* Use the protocol to get dongle stats */
		dhd_prot_dstats(&dhd->pub);
	}

	/* Copy dongle stats to net device stats */
	ifp->stats.rx_packets = dhd->pub.dstats.rx_packets;
	ifp->stats.tx_packets = dhd->pub.dstats.tx_packets;
	ifp->stats.rx_bytes = dhd->pub.dstats.rx_bytes;
	ifp->stats.tx_bytes = dhd->pub.dstats.tx_bytes;
	ifp->stats.rx_errors = dhd->pub.dstats.rx_errors;
	ifp->stats.tx_errors = dhd->pub.dstats.tx_errors;
	ifp->stats.rx_dropped = dhd->pub.dstats.rx_dropped;
	ifp->stats.tx_dropped = dhd->pub.dstats.tx_dropped;
	ifp->stats.multicast = dhd->pub.dstats.multicast;

	return &ifp->stats;
}

static int
dhd_watchdog_thread(void *data)
{
	dhd_info_t *dhd = (dhd_info_t *)data;

	/* This thread doesn't need any user-level access,
	 * so get rid of all our resources
	 */
#ifdef DHD_SCHED
	if (dhd_watchdog_prio > 0)
	{
		struct sched_param param;
		param.sched_priority = (dhd_watchdog_prio < MAX_RT_PRIO)?
			dhd_watchdog_prio:(MAX_RT_PRIO-1);
		setScheduler(current, SCHED_FIFO, &param);
	}
#endif /* DHD_SCHED */

	DAEMONIZE("dhd_watchdog");

	/* Run until signal received */
	while (1) {
		if (down_interruptible (&dhd->watchdog_sem) == 0) {
			/* Call the bus module watchdog */
			dhd_bus_watchdog(&dhd->pub);

			/* Count the tick for reference */
			dhd->pub.tickcnt++;

			/* Reschedule the watchdog */
			if (dhd->wd_timer_valid) {
				mod_timer(&dhd->timer, jiffies + dhd_watchdog_ms*HZ/1000);
			}
		}
		else
			break;
	}

	complete_and_exit(&dhd->watchdog_exited, 0);
}

static void
dhd_watchdog(ulong data)
{
	dhd_info_t *dhd = (dhd_info_t *)data;

	if (dhd->watchdog_pid >= 0) {
		up(&dhd->watchdog_sem);
		return;
	}

	/* Call the bus module watchdog */
	dhd_bus_watchdog(&dhd->pub);

	/* Count the tick for reference */
	dhd->pub.tickcnt++;

	/* Reschedule the watchdog */
	dhd->timer.expires = jiffies + dhd_watchdog_ms*HZ/1000;
	add_timer(&dhd->timer);
}

static int
dhd_dpc_thread(void *data)
{
	dhd_info_t *dhd = (dhd_info_t *)data;

	/* This thread doesn't need any user-level access,
	 * so get rid of all our resources
	 */
#ifdef DHD_SCHED
	if (dhd_dpc_prio > 0)
	{
		struct sched_param param;
		param.sched_priority = (dhd_dpc_prio < MAX_RT_PRIO)?dhd_dpc_prio:(MAX_RT_PRIO-1);
		setScheduler(current, SCHED_FIFO, &param);
	}
#endif /* DHD_SCHED */

	DAEMONIZE("dhd_dpc");

	/* Run until signal received */
	while (1) {
		if (down_interruptible(&dhd->dpc_sem) == 0) {
			/* Call bus dpc unless it indicated down (then clean stop) */
			if (dhd->pub.busstate != DHD_BUS_DOWN) {
				if (dhd_bus_dpc(dhd->pub.bus))
					up(&dhd->dpc_sem);
			} else {
				dhd_bus_stop(dhd->pub.bus, TRUE);
			}
		}
		else
			break;
	}

	complete_and_exit(&dhd->dpc_exited, 0);
}

static void
dhd_dpc(ulong data)
{
	dhd_info_t *dhd;

	dhd = (dhd_info_t*)data;

	/* Call bus dpc unless it indicated down (then clean stop) */
	if (dhd->pub.busstate != DHD_BUS_DOWN) {
		if (dhd_bus_dpc(dhd->pub.bus))
			tasklet_schedule(&dhd->tasklet);
	} else {
		dhd_bus_stop(dhd->pub.bus, TRUE);
	}
}

void
dhd_sched_dpc(dhd_pub_t *dhdp)
{
	dhd_info_t *dhd = (dhd_info_t*)(dhdp->info);

	if (dhd->dpc_pid >= 0) {
		up(&dhd->dpc_sem);
		return;
	}

	tasklet_schedule(&dhd->tasklet);
}

#ifdef TOE
/* Retrieve current toe component enables, which are kept as a bitmap in toe_ol iovar */
static int
dhd_toe_get(dhd_info_t *dhd, int ifidx, uint32 *toe_ol)
{
	wl_ioctl_t ioc;
	char buf[32];
	int ret;

	memset(&ioc, 0, sizeof(ioc));

	ioc.cmd = WLC_GET_VAR;
	ioc.buf = buf;
	ioc.len = (uint)sizeof(buf);
	ioc.set = FALSE;

	strcpy(buf, "toe_ol");
	if ((ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len)) < 0) {
		/* Check for older dongle image that doesn't support toe_ol */
		if (ret == -EIO) {
			DHD_ERROR(("%s: toe not supported by device\n",
				dhd_ifname(&dhd->pub, ifidx)));
			return -EOPNOTSUPP;
		}

		DHD_INFO(("%s: could not get toe_ol: ret=%d\n", dhd_ifname(&dhd->pub, ifidx), ret));
		return ret;
	}

	memcpy(toe_ol, buf, sizeof(uint32));
	return 0;
}

/* Set current toe component enables in toe_ol iovar, and set toe global enable iovar */
static int
dhd_toe_set(dhd_info_t *dhd, int ifidx, uint32 toe_ol)
{
	wl_ioctl_t ioc;
	char buf[32];
	int toe, ret;

	memset(&ioc, 0, sizeof(ioc));

	ioc.cmd = WLC_SET_VAR;
	ioc.buf = buf;
	ioc.len = (uint)sizeof(buf);
	ioc.set = TRUE;

	/* Set toe_ol as requested */

	strcpy(buf, "toe_ol");
	memcpy(&buf[sizeof("toe_ol")], &toe_ol, sizeof(uint32));

	if ((ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len)) < 0) {
		DHD_ERROR(("%s: could not set toe_ol: ret=%d\n",
			dhd_ifname(&dhd->pub, ifidx), ret));
		return ret;
	}

	/* Enable toe globally only if any components are enabled. */

	toe = (toe_ol != 0);

	strcpy(buf, "toe");
	memcpy(&buf[sizeof("toe")], &toe, sizeof(uint32));

	if ((ret = dhd_prot_ioctl(&dhd->pub, ifidx, &ioc, ioc.buf, ioc.len)) < 0) {
		DHD_ERROR(("%s: could not set toe: ret=%d\n", dhd_ifname(&dhd->pub, ifidx), ret));
		return ret;
	}

	return 0;
}
#endif /* TOE */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
static void dhd_ethtool_get_drvinfo(struct net_device *net,
                                    struct ethtool_drvinfo *info)
{
	dhd_info_t *dhd = (dhd_info_t *)net->priv;

	sprintf(info->driver, "wl");
	sprintf(info->version, "%lu", dhd->pub.drv_version);
}

struct ethtool_ops dhd_ethtool_ops = {
	.get_drvinfo = dhd_ethtool_get_drvinfo
};
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) */


#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 2)
static int
dhd_ethtool(dhd_info_t *dhd, void *uaddr)
{
	struct ethtool_drvinfo info;
	char drvname[sizeof(info.driver)];
	uint32 cmd;
#ifdef TOE
	struct ethtool_value edata;
	uint32 toe_cmpnt, csum_dir;
	int ret;
#endif

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	/* all ethtool calls start with a cmd word */
	if (copy_from_user(&cmd, uaddr, sizeof (uint32)))
		return -EFAULT;

	switch (cmd) {
	case ETHTOOL_GDRVINFO:
		/* Copy out any request driver name */
		if (copy_from_user(&info, uaddr, sizeof(info)))
			return -EFAULT;
		strncpy(drvname, info.driver, sizeof(info.driver));

		/* clear struct for return */
		memset(&info, 0, sizeof(info));
		info.cmd = cmd;

		/* if dhd requested, identify ourselves */
		if (strcmp(drvname, "?dhd") == 0) {
			sprintf(info.driver, "dhd");
			strcpy(info.version, EPI_VERSION_STR);
		}

		/* otherwise, require dongle to be up */
		else if (!dhd->pub.up)
			return -ENODEV;

		/* finally, report dongle driver type */
		else if (dhd->pub.iswl)
			sprintf(info.driver, "wl");
		else
			sprintf(info.driver, "xx");

		sprintf(info.version, "%lu", dhd->pub.drv_version);
		if (copy_to_user(uaddr, &info, sizeof(info)))
			return -EFAULT;
		DHD_CTL(("%s: given %*s, returning %s\n", __FUNCTION__,
		         (int)sizeof(drvname), drvname, info.driver));
		break;

#ifdef TOE
	/* Get toe offload components from dongle */
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
		if ((ret = dhd_toe_get(dhd, 0, &toe_cmpnt)) < 0)
			return ret;

		csum_dir = (cmd == ETHTOOL_GTXCSUM) ? TOE_TX_CSUM_OL : TOE_RX_CSUM_OL;

		edata.cmd = cmd;
		edata.data = (toe_cmpnt & csum_dir) ? 1 : 0;

		if (copy_to_user(uaddr, &edata, sizeof(edata)))
			return -EFAULT;
		break;

	/* Set toe offload components in dongle */
	case ETHTOOL_SRXCSUM:
	case ETHTOOL_STXCSUM:
		if (copy_from_user(&edata, uaddr, sizeof(edata)))
			return -EFAULT;

		/* Read the current settings, update and write back */
		if ((ret = dhd_toe_get(dhd, 0, &toe_cmpnt)) < 0)
			return ret;

		csum_dir = (cmd == ETHTOOL_STXCSUM) ? TOE_TX_CSUM_OL : TOE_RX_CSUM_OL;

		if (edata.data != 0)
			toe_cmpnt |= csum_dir;
		else
			toe_cmpnt &= ~csum_dir;

		if ((ret = dhd_toe_set(dhd, 0, toe_cmpnt)) < 0)
			return ret;

		/* If setting TX checksum mode, tell Linux the new mode */
		if (cmd == ETHTOOL_STXCSUM) {
			if (edata.data)
				dhd->iflist[0]->net->features |= NETIF_F_IP_CSUM;
			else
				dhd->iflist[0]->net->features &= ~NETIF_F_IP_CSUM;
		}

		break;
#endif /* TOE */

	default:
		return -EOPNOTSUPP;
	}

	return 0;
}
#endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 2) */

static int
dhd_ioctl_entry(struct net_device *net, struct ifreq *ifr, int cmd)
{
	dhd_info_t *dhd = (dhd_info_t *)net->priv;
	dhd_ioctl_t ioc;
	int bcmerror = 0;
	int buflen = 0;
	void *buf = NULL;
	uint driver = 0;
	int ifidx;

	ifidx = dhd_net2idx(dhd, net);
	DHD_TRACE(("%s: ifidx %d, cmd 0x%04x\n", __FUNCTION__, ifidx, cmd));
	if (ifidx == DHD_BAD_IF)
		return -1;

#ifdef CONFIG_WIRELESS_EXT
	/* linux wireless extensions */
	if ((cmd >= SIOCIWFIRST) && (cmd <= SIOCIWLAST)) {
		/* may recurse, do NOT lock */
		return wl_iw_ioctl(net, ifr, cmd);
	}
#endif /* CONFIG_WIRELESS_EXT */

#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 2)
	if (cmd == SIOCETHTOOL)
		return (dhd_ethtool(dhd, (void*)ifr->ifr_data));
#endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 2) */

	if (cmd != SIOCDEVPRIVATE)
		return -EOPNOTSUPP;

	memset(&ioc, 0, sizeof(ioc));

	/* Copy the ioc control structure part of ioctl request */
	if (copy_from_user(&ioc, ifr->ifr_data, sizeof(wl_ioctl_t))) {
		bcmerror = -BCME_BADADDR;
		goto done;
	}

	/* Copy out any buffer passed */
	if (ioc.buf) {
		buflen = MIN(ioc.len, DHD_IOCTL_MAXLEN);
		/* optimization for direct ioctl calls from kernel */
		/*
		if (segment_eq(get_fs(), KERNEL_DS)) {
			buf = ioc.buf;
		} else {
		*/
		{
			if (!(buf = (char*)MALLOC(dhd->pub.osh, buflen))) {
				bcmerror = -BCME_NOMEM;
				goto done;
			}
			if (copy_from_user(buf, ioc.buf, buflen)) {
				bcmerror = -BCME_BADADDR;
				goto done;
			}
		}
	}

	/* To differentiate between wl and dhd read 4 more byes */
	if ((copy_from_user(&driver, (char *)ifr->ifr_data + sizeof(wl_ioctl_t),
		sizeof(uint)) != 0)) {
		bcmerror = -BCME_BADADDR;
		goto done;
	}

	if (!capable(CAP_NET_ADMIN)) {
		bcmerror = -BCME_EPERM;
		goto done;
	}

	/* check for local dhd ioctl and handle it */
	if (driver == DHD_IOCTL_MAGIC) {
		bcmerror = dhd_ioctl((void *)&dhd->pub, &ioc, buf, buflen);
		if (bcmerror)
			dhd->pub.bcmerror = bcmerror;
		goto done;
	}

	/* send to dongle (must be up, and wl) */
	if (!dhd->pub.up || (dhd->pub.busstate != DHD_BUS_DATA)) {
		DHD_TRACE(("DONGLE_DOWN\n"));
		bcmerror = BCME_DONGLE_DOWN;
		goto done;
	}

	if (!dhd->pub.iswl) {
		bcmerror = BCME_DONGLE_DOWN;
		goto done;
	}

	bcmerror = dhd_prot_ioctl(&dhd->pub, ifidx, (wl_ioctl_t *)&ioc, buf, buflen);

done:
	if (!bcmerror && ioc.buf) {
		if (copy_to_user(ioc.buf, buf, buflen))
			bcmerror = -EFAULT;
	}

	if (buf)
		MFREE(dhd->pub.osh, buf, buflen);

	return OSL_ERROR(bcmerror);
}

static int
dhd_stop(struct net_device *net)
{
	dhd_info_t *dhd = (dhd_info_t *)net->priv;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	/* Set state and stop OS transmissions */
	dhd->pub.up = 0;
	netif_stop_queue(net);

	OLD_MOD_DEC_USE_COUNT;
	return 0;
}

static int
dhd_open(struct net_device *net)
{
	dhd_info_t *dhd = (dhd_info_t *)net->priv;
#ifdef TOE
	uint32 toe_ol;
#endif
	int ifidx;

	ifidx = dhd_net2idx(dhd, net);
	DHD_TRACE(("%s: ifidx %d\n", __FUNCTION__, ifidx));

	ASSERT(ifidx == 0);

	/* try to bring up bus */
	dhd_bus_start(&dhd->pub);

	memcpy(net->dev_addr, dhd->pub.mac.octet, ETHER_ADDR_LEN);

#ifdef TOE
	/* Get current TOE mode from dongle */
	if (dhd_toe_get(dhd, ifidx, &toe_ol) >= 0 && (toe_ol & TOE_TX_CSUM_OL) != 0)
		dhd->iflist[ifidx]->net->features |= NETIF_F_IP_CSUM;
	else
		dhd->iflist[ifidx]->net->features &= ~NETIF_F_IP_CSUM;
#endif

	/* Allow transmit calls */
	netif_start_queue(net);
	dhd->pub.up = 1;

	OLD_MOD_INC_USE_COUNT;
	return 0;
}

osl_t *
dhd_osl_attach(void *pdev, uint bustype)
{
	return osl_attach(pdev, bustype, TRUE);
}

void
dhd_osl_detach(osl_t *osh)
{
	if (MALLOCED(osh)) {
		DHD_ERROR(("%s: MEMORY LEAK %d bytes\n", __FUNCTION__, MALLOCED(osh)));
	}
	osl_detach(osh);
}

int
dhd_add_if(dhd_info_t *dhd, uint8 ifidx, void *handle, char *name)
{
	dhd_if_t *ifp;

	DHD_TRACE(("%s: idx %d, handle->%p\n", __FUNCTION__, ifidx, handle));

	ASSERT(dhd && (ifidx < DHD_MAX_IFS));

	ifp = dhd->iflist[ifidx];
	if (!ifp && !(ifp = MALLOC(dhd->pub.osh, sizeof(dhd_if_t)))) {
		DHD_ERROR(("%s: OOM - dhd_if_t\n", __FUNCTION__));
		return -ENOMEM;
	}

	memset(ifp, 0, sizeof(dhd_if_t));
	ifp->info = dhd;
	dhd->iflist[ifidx] = ifp;
	strncpy(ifp->name, name, IFNAMSIZ);
	ifp->name[IFNAMSIZ] = '\0';

	if (handle == NULL) {
		ifp->state = WLC_E_IF_ADD;
		ifp->idx = ifidx;
		if (BLOCKABLE()) {
			dhd_op_if(ifp);
		} else {
			ASSERT(dhd->sysioc_pid >= 0);
			up(&dhd->sysioc_sem);
		}
	} else
		ifp->net = (struct net_device *)handle;

	return 0;
}

void
dhd_del_if(dhd_info_t *dhd, uint8 ifidx)
{
	dhd_if_t *ifp;

	DHD_TRACE(("%s: idx %d\n", __FUNCTION__, ifidx));

	ASSERT(dhd && ifidx && (ifidx < DHD_MAX_IFS));
	ifp = dhd->iflist[ifidx];
	if (!ifp) {
		DHD_ERROR(("%s: Null interface\n", __FUNCTION__));
		return;
	}

	ifp->state = WLC_E_IF_DEL;
	ifp->idx = ifidx;
	if (BLOCKABLE()) {
		dhd_op_if(ifp);
	} else {
		ASSERT(dhd->sysioc_pid >= 0);
		up(&dhd->sysioc_sem);
	}
}

dhd_pub_t *
dhd_attach(osl_t *osh, struct dhd_bus *bus, uint bus_hdrlen)
{
	dhd_info_t *dhd = NULL;
	struct net_device *net;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	/* Allocate etherdev, including space for private structure */
	if (!(net = alloc_etherdev(sizeof(dhd_info_t)))) {
		DHD_ERROR(("%s: OOM - alloc_etherdev\n", __FUNCTION__));
		goto fail;
	}
	dhd = (dhd_info_t *)net->priv;
	memset(dhd, 0, sizeof(dhd_info_t));

	dhd->pub.osh = osh;

	if (dhd_add_if(dhd, 0, (void *)net, net->name) == DHD_BAD_IF)
		goto fail;

	net->open = NULL;

	init_MUTEX(&dhd->proto_sem);
	/* Initialize other structure content */
	init_waitqueue_head(&dhd->ioctl_resp_wait);

	/* Initialize the spinlocks */
	spin_lock_init(&dhd->sdlock);
	spin_lock_init(&dhd->txqlock);

	/* Link to info module */
	dhd->pub.info = dhd;

	/* Link to bus module */
	dhd->pub.bus = bus;
	dhd->pub.hdrlen = bus_hdrlen;

	/* Attach and link in the protocol */
	if (dhd_prot_attach(&dhd->pub) != 0) {
		DHD_ERROR(("dhd_prot_attach failed\n"));
		goto fail;
	}

#ifdef CONFIG_WIRELESS_EXT
	/* Attach and link in the iw */
	if (wl_iw_attach(net) != 0) {
		DHD_ERROR(("wl_iw_attach failed\n"));
		goto fail;
	}
#endif

	/* Set up the watchdog timer */
	init_timer(&dhd->timer);
	dhd->timer.data = (ulong)dhd;
	dhd->timer.function = dhd_watchdog;

	/* Initialize thread based operation and lock */
	init_MUTEX(&dhd->sdsem);
	if ((dhd_watchdog_prio >= 0) && (dhd_dpc_prio >= 0)) {
		dhd->threads_only = TRUE;
	}
	else {
		dhd->threads_only = FALSE;
	}

	if (dhd_dpc_prio >= 0) {
		/* Initialize watchdog thread */
		sema_init(&dhd->watchdog_sem, 0);
		init_completion(&dhd->watchdog_exited);
		dhd->watchdog_pid = kernel_thread(dhd_watchdog_thread, dhd, 0);
	} else {
		dhd->watchdog_pid = -1;
	}

	/* Set up the bottom half handler */
	if (dhd_dpc_prio >= 0) {
		/* Initialize DPC thread */
		sema_init(&dhd->dpc_sem, 0);
		init_completion(&dhd->dpc_exited);
		dhd->dpc_pid = kernel_thread(dhd_dpc_thread, dhd, 0);
	} else {
		tasklet_init(&dhd->tasklet, dhd_dpc, (ulong)dhd);
		dhd->dpc_pid = -1;
	}

	if (dhd_sysioc) {
		sema_init(&dhd->sysioc_sem, 0);
		init_completion(&dhd->sysioc_exited);
		dhd->sysioc_pid = kernel_thread(_dhd_sysioc_thread, dhd, 0);
	} else {
		dhd->sysioc_pid = -1;
	}

	return &dhd->pub;

fail:
	if (dhd)
		dhd_detach(&dhd->pub);

	return NULL;
}


int
dhd_bus_start(dhd_pub_t *dhdp)
{
	int ret = -1;
	dhd_info_t *dhd = (dhd_info_t*)dhdp->info;

	ASSERT(dhd);

	DHD_TRACE(("%s: \n", __FUNCTION__));

	/* try to download image and nvram to the dongle */
	if  (dhd->pub.busstate == DHD_BUS_DOWN) {
		if (!(dhd_bus_download_firmware(dhd->pub.bus, dhd->pub.osh,
		                                fw_path, nv_path))) {
			DHD_ERROR(("%s: dhdsdio_probe_download failed. firmware = %s nvram = %s\n",
			           __FUNCTION__, fw_path, nv_path));
			return -1;
		}
	}

	/* Start the watchdog timer */
	dhd->pub.tickcnt = 0;
	dhd_os_wd_timer(&dhd->pub, dhd_watchdog_ms);

	/* Bring up the bus */
	if ((ret = dhd_bus_init(&dhd->pub, TRUE)) != 0) {
		DHD_ERROR(("%s, dhd_bus_init failed %d\n", __FUNCTION__, ret));
		return ret;
	}

	atomic_set(&dhd->pend_8021x_cnt, 0);

	/* If bus is not ready, can't come up */
	if (dhd->pub.busstate != DHD_BUS_DATA) {
		del_timer(&dhd->timer);
		dhd->wd_timer_valid = FALSE;
		DHD_ERROR(("%s failed bus is not ready\n", __FUNCTION__));
		return -ENODEV;
	}

	/* Bus is ready, do any protocol initialization */
	dhd_prot_init(&dhd->pub);

	return 0;
}

int
dhd_net_attach(dhd_pub_t *dhdp, int ifidx)
{
	dhd_info_t *dhd = (dhd_info_t*)dhdp->info;
	struct net_device *net;
	uint8 temp_ethaddr[6] = { 0x00, 0x90, 0x4c, 0x11, 0x22, 0x33 };

	DHD_TRACE(("%s: ifidx %d\n", __FUNCTION__, ifidx));

	ASSERT(dhd && dhd->iflist[ifidx]);
	ASSERT(dhd->iflist[ifidx]->net);
	ASSERT(!dhd->iflist[ifidx]->net->open);

	/* Ok, link into the network layer... */
	net = dhd->iflist[ifidx]->net;
	if (ifidx == 0) {
		/*
		 * device functions for the primary interface only
		 */
		net->open = dhd_open;
		net->stop = dhd_stop;
	} else
		net->open = net->stop = NULL;
	net->get_stats = dhd_get_stats;
	net->do_ioctl = dhd_ioctl_entry;
	net->hard_start_xmit = dhd_start_xmit;
	net->hard_header_len = ETH_HLEN + dhd->pub.hdrlen;
	net->set_mac_address = dhd_set_mac_address;
	net->set_multicast_list = dhd_set_multicast_list;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
	net->ethtool_ops = &dhd_ethtool_ops;
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) */

#ifdef CONFIG_WIRELESS_EXT
#if WIRELESS_EXT < 19
	net->get_wireless_stats = dhd_get_wireless_stats;
#endif /* WIRELESS_EXT < 19 */
#if WIRELESS_EXT > 12
	net->wireless_handlers = (struct iw_handler_def *) &wl_iw_handler_def;
#endif /* WIRELESS_EXT > 12 */
#endif /* CONFIG_WIRELESS_EXT */

	dhd->pub.rxsz = net->mtu + net->hard_header_len;

	memcpy(net->dev_addr, temp_ethaddr, ETHER_ADDR_LEN);

	if (register_netdev(net) != 0) {
		DHD_ERROR(("couldn't register the net device\n"));
		goto fail;
	}

	printf("%s: Broadcom Dongle Host Driver\n", net->name);

	/* updates firmware nvram path if it was provided as module paramters */
	if ((firmware_path != NULL) && (firmware_path[0] != '\0'))
		strcpy(fw_path, firmware_path);
	if ((nvram_path != NULL) && (nvram_path[0] != '\0'))
		strcpy(nv_path, nvram_path);

	/* if firmware path present try to download and bring up bus */
	if (dhd_bus_start(dhdp) != 0) {
		DHD_TRACE(("%s: warning : check if firmware was provided\n", __FUNCTION__));
	}

	return 0;

fail:
	net->open = NULL;
	return BCME_ERROR;
}

void
dhd_bus_detach(dhd_pub_t *dhdp)
{
	dhd_info_t *dhd = (dhd_info_t *)dhdp->info;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	/* Stop the protocol module */
	dhd_prot_stop(&dhd->pub);

	/* Stop the bus module */
	dhd_bus_stop(dhd->pub.bus, TRUE);

	/* Clear the watchdog timer */
	del_timer(&dhd->timer);
	dhd->wd_timer_valid = FALSE;
}

void
dhd_detach(dhd_pub_t *dhdp)
{
	dhd_info_t *dhd = (dhd_info_t *)dhdp->info;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	if (dhd) {
		dhd_if_t *ifp;
		int i;

		for (i = 1; i < DHD_MAX_IFS; i++)
			if (dhd->iflist[i])
				dhd_del_if(dhd, i);

		ifp = dhd->iflist[0];
		ASSERT(ifp);
		if (ifp->net->open) {
			dhd_stop(ifp->net);
			unregister_netdev(ifp->net);
		}

		if (dhd->watchdog_pid >= 0)
		{
			KILL_PROC(dhd->watchdog_pid, SIGTERM);
			wait_for_completion(&dhd->watchdog_exited);
		}

		if (dhd->dpc_pid >= 0)
		{
			KILL_PROC(dhd->dpc_pid, SIGTERM);
			wait_for_completion(&dhd->dpc_exited);
		}
		else
		tasklet_kill(&dhd->tasklet);

		if (dhd->sysioc_pid >= 0) {
			KILL_PROC(dhd->sysioc_pid, SIGTERM);
			wait_for_completion(&dhd->sysioc_exited);
		}

		dhd_bus_detach(dhdp);

		if (dhdp->prot)
			dhd_prot_detach(dhdp);

#ifdef CONFIG_WIRELESS_EXT
		/* Attach and link in the iw */
		wl_iw_detach();
#endif

		free_netdev(ifp->net);
		MFREE(dhd->pub.osh, ifp, sizeof(*ifp));
	}
}

static int __init
dhd_module_init(void)
{
	int error;

	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	/* Sanity check on the module parameters */
	do
	{
		/* Both watchdog and DPC as tasklets are ok */
		if ((dhd_watchdog_prio < 0) && (dhd_dpc_prio < 0))
			break;

		/* If both watchdog and DPC are threads, TX must be deferred */
		if ((dhd_watchdog_prio >= 0) && (dhd_dpc_prio >= 0) && dhd_deferred_tx)
			break;

		printk("Invalid module parameters.\n");
		return -EINVAL;
	} while (0);

	error = dhd_bus_register();

	if (!error)
		printf("\n%s\n", dhd_version);

	return error;
}

static void __exit
dhd_module_cleanup(void)
{
	DHD_TRACE(("%s: Enter\n", __FUNCTION__));

	dhd_bus_unregister();
}


module_init(dhd_module_init);
module_exit(dhd_module_cleanup);

/*
 * OS specific functions required to implment DHD driver in OS indepedent way
 */
int
dhd_os_proto_block(dhd_pub_t * pub)
{
	dhd_info_t * dhd = (dhd_info_t *)(pub->info);

	if (dhd) {
		down(&dhd->proto_sem);
		return 1;
	}

	return 0;
}

int
dhd_os_proto_unblock(dhd_pub_t * pub)
{
	dhd_info_t * dhd = (dhd_info_t *)(pub->info);

	if (dhd) {
		up(&dhd->proto_sem);
		return 1;
	}

	return 0;
}

unsigned int
dhd_os_get_ioctl_resp_timeout(void)
{
	return ((unsigned int)dhd_ioctl_timeout_msec);
}

void
dhd_os_set_ioctl_resp_timeout(unsigned int timeout_msec)
{
	dhd_ioctl_timeout_msec = (int)timeout_msec;
}

int
dhd_os_ioctl_resp_wait(dhd_pub_t * pub, uint * condition, bool * pending)
{
	dhd_info_t * dhd = (dhd_info_t *)(pub->info);
	DECLARE_WAITQUEUE(wait, current);
	int timeout = dhd_ioctl_timeout_msec;

	/* Convert timeout in millsecond to jiffies */
	timeout = timeout * HZ / 1000;

	/* Wait until control frame is available */
	add_wait_queue(&dhd->ioctl_resp_wait, &wait);
	set_current_state(TASK_INTERRUPTIBLE);

	while (!(*condition) && (!signal_pending(current) && timeout))
		timeout = schedule_timeout(timeout);

	if (signal_pending(current))
		* pending = TRUE;

	set_current_state(TASK_RUNNING);
	remove_wait_queue(&dhd->ioctl_resp_wait, &wait);

	return timeout;
}

int
dhd_os_ioctl_resp_wake(dhd_pub_t * pub)
{
	dhd_info_t * dhd = (dhd_info_t *)(pub->info);

	if (waitqueue_active(&dhd->ioctl_resp_wait)) {
		wake_up_interruptible(&dhd->ioctl_resp_wait);
	}

	return 0;
}

void
dhd_os_wd_timer(void *bus, uint wdtick)
{
	dhd_pub_t *pub = bus;
	dhd_info_t *dhd = (dhd_info_t *) pub->info;

	/* Stop timer and restart at new value */
	if (dhd->wd_timer_valid == TRUE) {
		del_timer(&dhd->timer);
		dhd->wd_timer_valid = FALSE;
	}

	dhd_watchdog_ms = (uint)wdtick;
	dhd->timer.expires = jiffies + dhd_watchdog_ms*HZ/1000;
	add_timer(&dhd->timer);

	dhd->wd_timer_valid = TRUE;
}

void *
dhd_os_open_image(char * filename)
{
	struct file *fp;

	fp = filp_open(filename, O_RDONLY, 0);
	/*
	 * 2.6.11 (FC4) supports filp_open() but later revs don't?
	 * Alternative:
	 * fp = open_namei(AT_FDCWD, filename, O_RD, 0);
	 * ???
	 */
	 if (IS_ERR(fp))
		 fp = NULL;

	 return fp;
}

int
dhd_os_get_image_block(char * buf, int len, void * image)
{
	struct file *fp = (struct file *) image;
	int rdlen;

	if (!image)
		return 0;

	rdlen = kernel_read(fp, fp->f_pos, buf, len);
	if (rdlen > 0)
		fp->f_pos += rdlen;

	return rdlen;
}

void
dhd_os_close_image(void * image)
{
	if (image)
		filp_close((struct file *) image, NULL);
}


void
dhd_os_sdlock(dhd_pub_t * pub)
{
	dhd_info_t * dhd;

	dhd = (dhd_info_t *)(pub->info);

	if (dhd->threads_only)
		down(&dhd->sdsem);
	else
	spin_lock_bh(&dhd->sdlock);
}

void
dhd_os_sdunlock(dhd_pub_t * pub)
{
	dhd_info_t * dhd;

	dhd = (dhd_info_t *)(pub->info);

	if (dhd->threads_only)
		up(&dhd->sdsem);
	else
	spin_unlock_bh(&dhd->sdlock);
}

void
dhd_os_sdlock_txq(dhd_pub_t * pub)
{
	dhd_info_t * dhd;

	dhd = (dhd_info_t *)(pub->info);
	spin_lock_bh(&dhd->txqlock);
}

void
dhd_os_sdunlock_txq(dhd_pub_t * pub)
{
	dhd_info_t * dhd;

	dhd = (dhd_info_t *)(pub->info);
	spin_unlock_bh(&dhd->txqlock);
}
void
dhd_os_sdlock_rxq(dhd_pub_t * pub)
{
}
void
dhd_os_sdunlock_rxq(dhd_pub_t * pub)
{
}

#ifdef CONFIG_WIRELESS_EXT
struct iw_statistics *
dhd_get_wireless_stats(struct net_device *dev)
{
	int res = 0;
	dhd_info_t *dhd = (dhd_info_t *)dev->priv;

	res = wl_iw_get_wireless_stats(dev, &dhd->iw.wstats);

	if (res == 0)
		return &dhd->iw.wstats;
	else
		return NULL;
}
#endif /* CONFIG_WIRELESS_EXT */

static int
dhd_wl_host_event(dhd_info_t *dhd, int *ifidx, void *pktdata,
	wl_event_msg_t *event, void **data)
{
	int bcmerror = 0;

	ASSERT(dhd != NULL);

	bcmerror = wl_host_event(dhd, ifidx, pktdata, event, data);
	if (bcmerror != BCME_OK)
		return (bcmerror);

#ifdef CONFIG_WIRELESS_EXT
	ASSERT(dhd->iflist[*ifidx] != NULL);

	wl_iw_event(dhd->iflist[*ifidx]->net, event, *data);
#endif /* CONFIG_WIRELESS_EXT */

	return (bcmerror);
}

/* send up locally generated event */
void
dhd_sendup_event(dhd_pub_t *dhdp, wl_event_msg_t *event, void *data)
{
	switch (ntoh32(event->event_type)) {
	default:
		break;
	}
}

static int
dhd_get_pend_8021x_cnt(dhd_info_t *dhd)
{
	return (atomic_read(&dhd->pend_8021x_cnt));
}

#define MAX_WAIT_FOR_8021X_TX	10

int
dhd_wait_pend8021x(struct net_device *dev)
{
	dhd_info_t *dhd = (dhd_info_t *)dev->priv;
	int timeout = 10 * HZ / 1000;
	int ntimes = MAX_WAIT_FOR_8021X_TX;
	int pend = dhd_get_pend_8021x_cnt(dhd);

	while (ntimes && pend) {
		if (pend) {
			set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(timeout);
			set_current_state(TASK_RUNNING);
			ntimes--;
		}
		pend = dhd_get_pend_8021x_cnt(dhd);
	}
	return pend;
}
int
dhd_dev_reset(struct net_device *dev, uint8 flag)
{
	dhd_info_t *dhd = (dhd_info_t *)dev->priv;

	dhd_bus_devreset(&dhd->pub, flag);

	DHD_ERROR(("%s:  WLAN OFF DONE\n", __FUNCTION__));

	return 1;
}

void
dhd_dev_init_ioctl(struct net_device *dev)
{
	dhd_info_t *dhd = (dhd_info_t *)dev->priv;

	dhd_preinit_ioctls(&dhd->pub);
}