madwifi/ath/if_athvar.h

/*-
 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer,
	without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *    redistribution must be conditioned upon including a substantially
 *    similar Disclaimer requirement for further binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGES.
 *
 * $Id$
 */

/*
 * Defintions for the Atheros Wireless LAN controller driver.
 */
#ifndef _DEV_ATH_ATHVAR_H
#define _DEV_ATH_ATHVAR_H

#include "ah.h"
#include "ah_desc.h"
#include "ah_os.h"
#include "if_athioctl.h"
#include "net80211/ieee80211.h"		/* XXX for WME_NUM_AC */
#include <asm/io.h>
#include <linux/list.h>

/*
 * Deduce if tasklets are available.  If not then
 * fall back to using the immediate work queue.
 */
#include <linux/interrupt.h>
#ifdef DECLARE_TASKLET			/* native tasklets */
#define ATH_TQ_STRUCT tasklet_struct
#define ATH_INIT_TQUEUE(a,b,c)		tasklet_init((a), (b), (unsigned long)(c))
#define ATH_SCHEDULE_TQUEUE(a,b)	tasklet_schedule((a))
typedef unsigned long TQUEUE_ARG;
#define mark_bh(a) do {} while (0)
#else					/* immediate work queue */
#define ATH_TQ_STRUCT tq_struct
#define ATH_INIT_TQUEUE(a,b,c)		INIT_TQUEUE(a,b,c)
#define ATH_SCHEDULE_TQUEUE(a,b) do {		\
	*(b) |= queue_task((a), &tq_immediate);	\
} while (0)
typedef void *TQUEUE_ARG;
#define	tasklet_disable(t)	do { (void) t; local_bh_disable(); } while (0)
#define	tasklet_enable(t)	do { (void) t; local_bh_enable(); } while (0)
#endif /* !DECLARE_TASKLET */

#include <linux/sched.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,41)
#include <linux/tqueue.h>
#define work_struct			tq_struct
#define schedule_work(t)		schedule_task((t))
#define flush_scheduled_work()		flush_scheduled_tasks()
#define ATH_INIT_WORK(t, f) do { 			\
	memset((t), 0, sizeof(struct tq_struct)); \
	(t)->routine = (void (*)(void*)) (f); 	\
	(t)->data=(void *) (t);			\
} while (0)
#else
#include <linux/workqueue.h>

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
#define ATH_INIT_WORK(_t, _f)	INIT_WORK((_t), (void (*)(void *))(_f), (_t));
#else
#define ATH_INIT_WORK(_t, _f)	INIT_WORK((_t), (_f));
#endif

#endif /* KERNEL_VERSION < 2.5.41 */

/*
 * Guess how the interrupt handler should work.
 */
#if !defined(IRQ_NONE)
typedef void irqreturn_t;
#define	IRQ_NONE
#define	IRQ_HANDLED
#endif /* !defined(IRQ_NONE) */

#ifndef SET_MODULE_OWNER
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
#define	SET_MODULE_OWNER(dev) do {		\
	dev->owner = THIS_MODULE;		\
} while (0)
#else
#define SET_MODULE_OWNER(dev) do { } while (0)
#endif
#endif

#ifndef SET_NETDEV_DEV
#define	SET_NETDEV_DEV(ndev, pdev)
#endif

#ifdef to_net_dev
#define ATH_GET_NETDEV_DEV(ndev)	((ndev)->dev.parent)
#else
#define ATH_GET_NETDEV_DEV(ndev)	((ndev)->class_dev.dev)
#endif

#ifndef	NETDEV_TX_OK
#define	NETDEV_TX_OK	0
#define	NETDEV_TX_BUSY	1
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,23)
static inline struct net_device *_alloc_netdev(int sizeof_priv, const char *mask,
					       void (*setup)(struct net_device *))
{
	struct net_device *dev;
	int alloc_size;

	/* ensure 32-byte alignment of the private area */
	alloc_size = sizeof (*dev) + sizeof_priv + 31;

	dev = (struct net_device *) kmalloc (alloc_size, GFP_KERNEL);
	if (dev == NULL)
	{
		printk(KERN_ERR "alloc_dev: Unable to allocate device memory.\n");
		return NULL;
	}

	memset(dev, 0, alloc_size);

	if (sizeof_priv)
		dev->priv = (void *) (((long)(dev + 1) + 31) & ~31);

	setup(dev);
	strcpy(dev->name, mask);

	return dev;
}

/* Avoid name collision - some vendor kernels backport alloc_netdev() */
#undef alloc_netdev
#define alloc_netdev(s,m,d) _alloc_netdev(s, m, d)

/* Some vendors backport PDE, so make it a macro here */
#undef PDE
#define PDE(inode) ((struct proc_dir_entry *)(inode)->u.generic_ip)
#endif


/*
 * Macro to expand scalars to 64-bit objects
 */
#define	ito64(x) (sizeof(x)==8) ? (((unsigned long long int)(x)) & (0xff)) : \
		 (sizeof(x)==16) ? (((unsigned long long int)(x)) & 0xffff) : \
		 ((sizeof(x)==32) ? (((unsigned long long int)(x)) & 0xffffffff): (unsigned long long int)(x))


/*
 * Deal with the sysctl handler api changing.
 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8)
#define	ATH_SYSCTL_DECL(f, ctl, write, filp, buffer, lenp, ppos) \
	f(ctl_table *ctl, int write, struct file *filp, \
	  void __user *buffer, size_t *lenp)
#define	ATH_SYSCTL_PROC_DOINTVEC(ctl, write, filp, buffer, lenp, ppos) \
	proc_dointvec(ctl, write, filp, buffer, lenp)
#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8) */
#define	ATH_SYSCTL_DECL(f, ctl, write, filp, buffer, lenp, ppos) \
	f(ctl_table *ctl, int write, struct file *filp, \
	  void __user *buffer, size_t *lenp, loff_t *ppos)
#define	ATH_SYSCTL_PROC_DOINTVEC(ctl, write, filp, buffer, lenp, ppos) \
	proc_dointvec(ctl, write, filp, buffer, lenp, ppos)
#endif

#define	ATH_TIMEOUT	1000

#define ATH_DFS_WAIT_POLL_PERIOD	2	/* 2 seconds */

#define	ATH_LONG_CALINTERVAL		30	/* 30 seconds between calibrations */
#define	ATH_SHORT_CALINTERVAL		1	/* 1 second between calibrations */

/*
 * Maximum acceptable MTU
 * MAXFRAMEBODY - WEP - QOS - RSN/WPA:
 * 2312 - 8 - 2 - 12 = 2290
 */
#define ATH_MAX_MTU     2290
#define ATH_MIN_MTU     32

#define	ATH_RXBUF	40		/* number of RX buffers */
#define	ATH_TXBUF	200		/* number of TX buffers */

#define	ATH_BCBUF	4		/* number of beacon buffers */

/* free buffer threshold to restart net dev */
#define	ATH_TXBUF_FREE_THRESHOLD  (ATH_TXBUF / 20)
/* number of TX buffers reserved for mgt frames */
#define ATH_TXBUF_MGT_RESERVED	  5 	

#define TAIL_DROP_COUNT 50             /* maximum number of queued frames allowed */

/*
 * dynamic turbo specific macros.
 */
#define ATH_TURBO_UP_THRESH	750000	/* bytes/sec */
#define ATH_TURBO_DN_THRESH 	1000000	/* bytes/sec */
#define ATH_TURBO_PERIOD_HOLD	1 	/* in seconds */

/*
 * The only case where we see skbuff chains is due to FF aggregation in
 * the driver.
 */
#ifdef ATH_SUPERG_FF
#define	ATH_TXDESC	2		/* number of descriptors per buffer */
#else
#define	ATH_TXDESC	1		/* number of descriptors per buffer */
#endif

#define	ATH_TXMAXTRY	11		/* max number of transmit attempts */

/* Compress settings */
#define ATH_COMP_THRESHOLD  256         /* no compression for frames
					   longer than this threshold  */
#define ATH_COMP_PROC_NO_COMP_NO_CCS    3
#define ATH_COMP_PROC_NO_COMP_ADD_CCS   2
#define ATH_COMP_PROC_COMP_NO_OPTIAML   1
#define ATH_COMP_PROC_COMP_OPTIMAL      0
#define ATH_DEFAULT_COMP_PROC           ATH_COMP_PROC_COMP_OPTIMAL

#define INVALID_DECOMP_INDEX		0xFFFF

#define WEP_IV_FIELD_SIZE       4       /* wep IV field size */
#define WEP_ICV_FIELD_SIZE      4       /* wep ICV field size */
#define AES_ICV_FIELD_SIZE      8       /* AES ICV field size */
#define EXT_IV_FIELD_SIZE       4       /* ext IV field size */

/* XR specific macros */

#define XR_DEFAULT_GRPPOLL_RATE_STR 	"0.25 1 1 3 3 6 6 20"
#define GRPPOLL_RATE_STR_LEN 	64
#define XR_SLOT_DELAY		30      /* in usec */
#define XR_AIFS			0
#define XR_NUM_RATES		5
#define XR_NUM_SUP_RATES	8
/* XR uplink should have same cwmin/cwmax value */
#define XR_CWMIN_CWMAX	7

#define XR_DATA_AIFS	3
#define XR_DATA_CWMIN	31
#define XR_DATA_CWMAX	1023

/* pick the threshold so that we meet most of the regulatory constraints */
#define XR_FRAGMENTATION_THRESHOLD		540
#define XR_TELEC_FRAGMENTATION_THRESHOLD	442

#define XR_MAX_GRP_POLL_PERIOD		1000	/* Maximum Group Poll Periodicity */

#define XR_DEFAULT_POLL_INTERVAL	100
#define XR_MIN_POLL_INTERVAL		30
#define XR_MAX_POLL_INTERVAL		1000
#define XR_DEFAULT_POLL_COUNT		32
#define XR_MIN_POLL_COUNT		16
#define XR_MAX_POLL_COUNT		64
#define XR_POLL_UPDATE_PERIOD		10	/* number of XR beacons */
#define XR_GRPPOLL_PERIOD_FACTOR	5	/* factor used in calculating grp poll interval */
#define XR_4MS_FRAG_THRESHOLD		128	/* fragmentation threshold for 4msec frame limit  */

/*
 * Maximum Values in ms for group poll periodicty
 */
#define GRP_POLL_PERIOD_NO_XR_STA_MAX	100
#define GRP_POLL_PERIOD_XR_STA_MAX	30

 /*
 * Percentage of the configured poll periodicity
 */
#define GRP_POLL_PERIOD_FACTOR_XR_STA	30	/* When XR Stations associated freq is 30% higher */

#define A_MAX(a,b) ((a) > (b) ? (a) : (b))

/*
 * Macros to obtain the Group Poll Periodicity in various situations
 *
 * Curerntly there are the two cases
 * (a) When there are no XR STAs associated
 * (b) When there is atleast one XR STA associated
 */
#define GRP_POLL_PERIOD_NO_XR_STA(sc) (sc->sc_xrpollint)
#define GRP_POLL_PERIOD_XR_STA(sc)                                                   \
	A_MAX(GRP_POLL_PERIOD_FACTOR_XR_STA * (sc->sc_xrpollint / 100), GRP_POLL_PERIOD_XR_STA_MAX)

/*
 * When there are no XR STAs and a valid double chirp is received then the Group Polls are
 * transmitted for 10 seconds from the time of the last valid double double-chirp
 */
#define NO_XR_STA_GRPPOLL_TX_DUR	10000


/*
 * The key cache is used for h/w cipher state and also for
 * tracking station state such as the current tx antenna.
 * We also setup a mapping table between key cache slot indices
 * and station state to short-circuit node lookups on rx.
 * Different parts have different size key caches.  We handle
 * up to ATH_KEYMAX entries (could dynamically allocate state).
 */
#define	ATH_KEYMAX	128		/* max key cache size we handle */
#define	ATH_KEYBYTES	(ATH_KEYMAX / NBBY)	/* storage space in bytes */

#ifdef ATH_REVERSE_ENGINEERING
#define MIN_REGISTER_ADDRESS	0x0000		/* PCI register addresses are taken as releative to the appropriate BAR */
#define MAX_REGISTER_ADDRESS	0xc000 		/* AR5212/AR5213 seems to have a 48k address range */
#define MAX_REGISTER_NAME_LEN	32		/* Maximum length of register nicknames in debug output */
#define UNKNOWN_NAME		"(unknown)"	/* Name used when reading/listing undocumented registers */
#endif /* #ifdef ATH_REVERSE_ENGINEERING */
/*
 * Convert from net80211 layer values to Ath layer values. Hopefully this will
 * be optimised away when the two constants are the same.
 */
typedef unsigned int ath_keyix_t;
#define ATH_KEY(_keyix)	((_keyix == IEEE80211_KEYIX_NONE) ? HAL_TXKEYIX_INVALID : _keyix)

#define	ATH_MIN_FF_RATE	12000		/* min rate for ff aggregation in kbps */
#define	ATH_MIN_FF_RATE	12000		/* min rate for ff aggregation in kbps */
struct ath_buf;
typedef STAILQ_HEAD(, ath_buf) ath_bufhead;

/* driver-specific node state */
struct ath_node {
	struct ieee80211_node an_node;		/* base class */
	u_int16_t an_decomp_index; 		/* decompression mask index */
	u_int32_t an_avgrssi;			/* average rssi over all rx frames */
	u_int8_t  an_prevdatarix;		/* rate ix of last data frame */
	u_int16_t an_minffrate;			/* min rate in kbps for ff to aggregate */
	HAL_NODE_STATS an_halstats;		/* rssi statistics used by hal */
	
	struct ath_buf *an_tx_ffbuf[WME_NUM_AC]; /* ff staging area */

	ath_bufhead an_uapsd_q;			/* U-APSD delivery queue */
	int an_uapsd_qdepth; 			/* U-APSD delivery queue depth */
	ath_bufhead an_uapsd_overflowq; 	/* U-APSD overflow queue (for > MaxSp frames) */
	int an_uapsd_overflowqdepth; 		/* U-APSD overflow queue depth */
	spinlock_t an_uapsd_lock; 		/* U-APSD delivery queue lock */
	/* variable-length rate control state follows */
};
#define	ATH_NODE(_n)			((struct ath_node *)(_n))
#define	ATH_NODE_CONST(ni)		((const struct ath_node *)(ni))
#define ATH_NODE_UAPSD_LOCK_INIT(_an)	spin_lock_init(&(_an)->an_uapsd_lock)
#define ATH_NODE_UAPSD_LOCK_IRQ(_an)	do {	\
	unsigned long __an_uapsd_lockflags;	\
	spin_lock_irqsave(&(_an)->an_uapsd_lock, __an_uapsd_lockflags);
#define ATH_NODE_UAPSD_UNLOCK_IRQ(_an)		\
	spin_unlock_irqrestore(&(_an)->an_uapsd_lock, __an_uapsd_lockflags); \
} while (0)
#define ATH_NODE_UAPSD_UNLOCK_IRQ_EARLY(_an)		\
	spin_unlock_irqrestore(&(_an)->an_uapsd_lock, __an_uapsd_lockflags);


#define ATH_RSSI_LPF_LEN	10
#define ATH_RSSI_DUMMY_MARKER	0x127
#define ATH_EP_MUL(x, mul)	((x) * (mul))
#define ATH_RSSI_IN(x)		(ATH_EP_MUL((x), HAL_RSSI_EP_MULTIPLIER))
#define ATH_LPF_RSSI(x, y, len) \
	((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
#define ATH_RSSI_LPF(x, y) do {						\
	if ((y) >= -20)							\
		x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);	\
} while (0)

#define	ATH_ANTENNA_DIFF	2	/* Num frames difference in
					 * tx to flip default recv
					 * antenna
					 */

struct ath_buf {
	/* FFXXX: convert both list types to TAILQ to save a field? */
	STAILQ_ENTRY(ath_buf) bf_list;
#ifdef ATH_SUPERG_FF
	TAILQ_ENTRY(ath_buf) bf_stagelist;		/* fast-frame staging list */
#endif
	struct ath_desc	*bf_desc;			/* virtual addr of desc */
	struct ath_desc_status bf_dsstatus;		/* tx/rx descriptor status */
	dma_addr_t bf_daddr;				/* physical addr of desc */
	struct sk_buff *bf_skb;				/* skbuff for buf */
	dma_addr_t bf_skbaddr;				/* physical addr of skb data - always used by one desc*/
	struct ieee80211_node *bf_node;			/* pointer to the node */
	u_int32_t bf_status;				/* status flags */
	u_int16_t bf_flags;				/* tx descriptor flags */
	u_int64_t bf_tsf;
	int16_t bf_channoise;
#ifdef ATH_SUPERG_FF
	/* XXX: combine this with bf_skbaddr if it ever changes to accommodate
	 *      multiple segments.
	 */
	u_int16_t bf_numdescff;				/* number of descs used for FF (these are extra) */
	u_int32_t bf_queueage;				/* "age" of txq when this buffer placed on stageq */
	dma_addr_t bf_skbaddrff[ATH_TXDESC - 1]; 	/* extra addrs for FF */
#endif
};

/*
 * reset the rx buffer.
 * any new fields added to the athbuf and require 
 * reset need to be added to this macro.
 * currently bf_status is the only one that
 * requires reset.
 */
#define ATH_RXBUF_RESET(bf)	bf->bf_status=0

/* XXX: only managed for rx at the moment */
#define ATH_BUFSTATUS_DONE		0x00000001	/* hw processing complete, desc processed by hal */
#define ATH_BUFSTATUS_RADAR_DONE	0x00000002	/* marker to indicate a PHYERR for radar pulse
							   has already been handled.  We may receive
							   multiple interrupts before the rx_tasklet
							   clears the queue */
#define ATH_BUFSTATUS_RXTSTAMP          0x00000004      /* RX timestamps needs to be adjusted */

/* DMA state for tx/rx descriptors. */
struct ath_descdma {
	const char *dd_name;
	struct ath_desc	*dd_desc;	/* descriptors */
	dma_addr_t dd_desc_paddr;	/* physical addr of dd_desc */
	size_t dd_desc_len;		/* size of dd_desc */
	struct ath_buf *dd_bufptr;	/* associated buffers */
};

struct ath_hal;
struct ath_desc;
struct ath_ratectrl;
struct ath_tx99;
struct proc_dir_entry;

/*
 * Data transmit queue state.  One of these exists for each
 * hardware transmit queue.  Packets sent to us from above
 * are assigned to queues based on their priority.  Not all
 * devices support a complete set of hardware transmit queues.
 * For those devices the array sc_ac2q will map multiple
 * priorities to fewer hardware queues (typically all to one
 * hardware queue).
 */
struct ath_txq {
	u_int axq_qnum;			/* hardware q number */
	u_int32_t *axq_link;		/* link ptr in last TX desc */
	STAILQ_HEAD(, ath_buf) axq_q;	/* transmit queue */
	spinlock_t axq_lock;		/* lock on q and link */
	int axq_depth;			/* queue depth */
	u_int32_t axq_totalqueued;	/* total ever queued */
	u_int axq_intrcnt;		/* count to determine if descriptor
					 * should generate int on this txq.
					 */
	/*
	 * Staging queue for frames awaiting a fast-frame pairing.
	 */
	TAILQ_HEAD(axq_headtype, ath_buf) axq_stageq;

	/* scratch compression buffer */
	char *axq_compbuf;		/* scratch comp buffer */
	dma_addr_t axq_compbufp;	/* scratch comp buffer (phys)*/
	u_int axq_compbufsz;		/* scratch comp buffer size */
};

/* driver-specific vap state */
struct ath_vap {
	struct ieee80211vap av_vap;	/* base class */
	int (*av_newstate)(struct ieee80211vap *, enum ieee80211_state, int);
	/* XXX beacon state */
	struct ath_buf *av_bcbuf;	/* beacon buffer */
	struct ieee80211_beacon_offsets av_boff;/* dynamic update state */
	int av_bslot;			/* beacon slot index */
	struct ath_txq av_mcastq;	/* multicast transmit queue */
	u_int8_t	av_dfswait_run;
};
#define	ATH_VAP(_v)	((struct ath_vap *)(_v))

#define	ATH_BEACON_AIFS_DEFAULT		0  /* Default aifs for ap beacon q */
#define	ATH_BEACON_CWMIN_DEFAULT	0  /* Default cwmin for ap beacon q */
#define	ATH_BEACON_CWMAX_DEFAULT	0  /* Default cwmax for ap beacon q */

#define ATH_TXQ_INTR_PERIOD		5  /* axq_intrcnt period for intr gen */
#define	ATH_TXQ_LOCK_INIT(_tq)		spin_lock_init(&(_tq)->axq_lock)
#define	ATH_TXQ_LOCK_DESTROY(_tq)
#define ATH_TXQ_LOCK_IRQ(_tq)		do {				\
	unsigned long __axq_lockflags;					\
	spin_lock_irqsave(&(_tq)->axq_lock, __axq_lockflags);
#define ATH_TXQ_UNLOCK_IRQ(_tq)						\
	spin_unlock_irqrestore(&(_tq)->axq_lock, __axq_lockflags);	\
} while (0)
#define ATH_TXQ_UNLOCK_IRQ_EARLY(_tq)					\
	spin_unlock_irqrestore(&(_tq)->axq_lock, __axq_lockflags);
#define ATH_TXQ_LOCK_IRQ_INSIDE(_tq) spin_lock(&(_tq)->axq_lock);
#define ATH_TXQ_UNLOCK_IRQ_INSIDE(_tq) spin_unlock(&(_tq)->axq_lock);

#define	ATH_TXQ_LOCK_ASSERT(_tq) \
	KASSERT(spin_is_locked(&(_tq)->axq_lock), ("txq not locked!"))

#define ATH_TXQ_INSERT_TAIL(_tq, _elm, _field) do { \
	STAILQ_INSERT_TAIL( &(_tq)->axq_q, (_elm), _field); \
	(_tq)->axq_depth++; \
	(_tq)->axq_totalqueued++; \
} while (0)
#define ATH_TXQ_REMOVE_HEAD(_tq, _field) do { \
	STAILQ_REMOVE_HEAD(&(_tq)->axq_q, _field); \
	(_tq)->axq_depth--; \
} while (0)
/* move buffers from MCASTQ to CABQ */
#define ATH_TXQ_MOVE_MCASTQ(_tqs,_tqd) do { \
	(_tqd)->axq_depth += (_tqs)->axq_depth; \
	(_tqd)->axq_totalqueued += (_tqs)->axq_totalqueued; \
	(_tqd)->axq_link = (_tqs)->axq_link; \
	STAILQ_CONCAT(&(_tqd)->axq_q, &(_tqs)->axq_q); \
	(_tqs)->axq_depth=0; \
	(_tqs)->axq_totalqueued = 0; \
	(_tqs)->axq_link = NULL; \
} while (0)

/* 
 * concat buffers from one queue to other
 */
#define ATH_TXQ_MOVE_Q(_tqs,_tqd)  ATH_TXQ_MOVE_MCASTQ(_tqs,_tqd)

#define	BSTUCK_THRESH	10	/* # of stuck beacons before resetting NB: this is a guess*/

struct ath_softc {
	struct ieee80211com sc_ic;		/* NB: must be first */
	struct net_device *sc_dev;
	void __iomem *sc_iobase;		/* address of the device */
	struct semaphore sc_lock;		/* dev-level lock */
	struct net_device_stats	sc_devstats;	/* device statistics */
	struct ath_stats sc_stats;		/* private statistics */
	int devid;
	int sc_debug;
	int sc_default_ieee80211_debug;		/* default debug flags for new VAPs */
	void (*sc_recv_mgmt)(struct ieee80211_node *, struct sk_buff *, int, int, u_int64_t);
#ifdef IEEE80211_DEBUG_REFCNT
	void (*sc_node_cleanup_debug)(struct ieee80211_node *, const char* func, int line);
	void (*sc_node_free_debug)(struct ieee80211_node *, const char* func, int line);
#else /* #ifdef IEEE80211_DEBUG_REFCNT */
	void (*sc_node_cleanup)(struct ieee80211_node *);
	void (*sc_node_free)(struct ieee80211_node *);
#endif /* #ifdef IEEE80211_DEBUG_REFCNT */
	void *sc_bdev;				/* associated bus device */
	struct ath_hal *sc_ah;			/* Atheros HAL */
	spinlock_t sc_hal_lock;                 /* hardware access lock */
	struct ath_ratectrl *sc_rc;		/* tx rate control support */
	struct ath_tx99 *sc_tx99; 		/* tx99 support */
	void (*sc_setdefantenna)(struct ath_softc *, u_int);
	unsigned int 	sc_invalid:1,		/* being detached */
			sc_mrretry:1,		/* multi-rate retry support */
			sc_softled:1,		/* enable LED gpio status */
			sc_splitmic:1,		/* split TKIP MIC keys */
			sc_needmib:1,		/* enable MIB stats intr */
			sc_hasdiversity:1,	/* rx diversity available */
			sc_diversity:1, 	/* enable rx diversity */
			sc_olddiversity:1, 	/* diversity setting before XR enable */
			sc_hasveol:1,		/* tx VEOL support */
			sc_hastpc:1,		/* per-packet TPC support */
			sc_dturbo:1,		/* dynamic turbo capable */
			sc_dturbo_switch:1,	/* turbo switch mode*/
			sc_dturbo_hold:1,	/* dynamic turbo hold state */
			sc_rate_recn_state:1,	/* dynamic turbo state recmded by ratectrl */
			sc_ignore_ar:1,		/* ignore AR during transition */
			sc_ledstate:1,		/* LED on/off state */
			sc_blinking:1,		/* LED blink operation active */
			sc_beacons:1,		/* beacons running */
			sc_hasbmask:1,		/* bssid mask support */
			sc_mcastkey:1,		/* mcast key cache search */
			sc_hastsfadd:1,		/* tsf adjust support */
			sc_scanning:1,		/* scanning active */
			sc_nostabeacons:1,	/* no beacons for station */
			sc_xrgrppoll:1,		/* xr group polls are active */
			sc_syncbeacon:1,	/* sync/resync beacon timers */
			sc_hasclrkey:1,		/* CLR key supported */
			sc_devstopped:1,	/* stopped due to of no tx bufs */
			sc_stagbeacons:1,	/* use staggered beacons */
			sc_dfswait:1,		/* waiting on channel for radar detect */
			sc_ackrate:1,		/* send acks at high bitrate */
			sc_hasintmit:1,		/* Interference mitigation */
			sc_txcont:1;        	/* Is continuous transmit enabled? */
	unsigned int sc_txcont_power; /* Continuous transmit power in 0.5dBm units */
	unsigned int sc_txcont_rate;  /* Continuous transmit rate in Mbps */

	/* rate tables */
	const HAL_RATE_TABLE *sc_rates[IEEE80211_MODE_MAX];
	const HAL_RATE_TABLE *sc_currates;	/* current rate table */
	const HAL_RATE_TABLE *sc_xr_rates;	/* XR rate table */
	const HAL_RATE_TABLE *sc_half_rates;	/* half rate table */
	const HAL_RATE_TABLE *sc_quarter_rates;	/* quarter rate table */
	HAL_OPMODE sc_opmode;			/* current hal operating mode */
	enum ieee80211_phymode sc_curmode;	/* current phy mode */
	u_int16_t sc_curtxpow;			/* current tx power limit */
	u_int16_t sc_curaid;			/* current association id */
	HAL_CHANNEL sc_curchan;			/* current h/w channel */
	u_int8_t sc_curbssid[IEEE80211_ADDR_LEN];
	u_int8_t	sc_rixmap[256];			/* IEEE to h/w rate table ix */
	struct {
		u_int8_t	ieeerate;		/* IEEE rate */
		u_int8_t	flags;			/* radiotap flags */
		u_int16_t ledon;			/* softled on time */
		u_int16_t ledoff;		/* softled off time */
	} sc_hwmap[32];				/* h/w rate ix mappings */
	u_int8_t sc_minrateix;			/* min h/w rate index */
	u_int8_t sc_protrix;			/* protection rate index */
	u_int8_t sc_mcastantenna;		/* Multicast antenna number */
	u_int8_t sc_txantenna;			/* data tx antenna (fixed or auto) */
	u_int16_t sc_nvaps;			/* # of active virtual APs */
	u_int8_t sc_nstavaps;			/* # of active station VAPs */
	u_int8_t sc_nmonvaps;			/* # of monitor VAPs */
	u_int8_t sc_nbcnvaps;			/* # of vaps sending beacons */
	u_int sc_fftxqmin;			/* aggregation threshold */
	HAL_INT sc_imask;			/* interrupt mask copy */
	u_int sc_keymax;			/* size of key cache */
	u_int8_t sc_keymap[ATH_KEYBYTES];	/* key use bit map */
	struct ieee80211_node *sc_keyixmap[ATH_KEYMAX];/* key ix->node map */
	u_int8_t sc_bssidmask[IEEE80211_ADDR_LEN];

	u_int sc_ledpin;			/* GPIO pin for driving LED */
	u_int sc_ledon;				/* pin setting for LED on */
	u_int sc_ledidle;			/* idle polling interval */
	int sc_ledevent;			/* time of last LED event */
	u_int8_t sc_rxrate;			/* current rx rate for LED */
	u_int8_t sc_txrate;			/* current tx rate for LED */
	u_int16_t sc_ledoff;			/* off time for current blink */
	struct timer_list sc_ledtimer;		/* led off timer */
	struct timer_list sc_dfswaittimer;	/* dfs wait timer */

	struct ATH_TQ_STRUCT sc_fataltq;	/* fatal error intr tasklet */

	int sc_rxbufsize;			/* rx size based on mtu */
	struct ath_descdma sc_rxdma;		/* RX descriptors */
	ath_bufhead sc_rxbuf;			/* receive buffer */
	struct ath_buf *sc_rxbufcur;		/* current rx buffer */
	u_int32_t *sc_rxlink;			/* link ptr in last RX desc */
	spinlock_t sc_rxbuflock;
	struct ATH_TQ_STRUCT sc_rxtq;		/* rx intr tasklet */
	struct ATH_TQ_STRUCT sc_rxorntq;	/* rxorn intr tasklet */
	u_int8_t sc_defant;			/* current default antenna */
	u_int8_t sc_rxotherant;			/* RXs on non-default antenna */
	u_int16_t sc_cachelsz;			/* cache line size */

	struct ath_descdma sc_txdma;		/* TX descriptors */
	ath_bufhead sc_txbuf;			/* transmit buffer */
	spinlock_t sc_txbuflock;		/* txbuf lock */
	u_int sc_txqsetup;			/* h/w queues setup */
	u_int sc_txintrperiod;			/* tx interrupt batching */
	struct ath_txq sc_txq[HAL_NUM_TX_QUEUES];
	struct ath_txq *sc_ac2q[WME_NUM_AC];	/* WME AC -> h/w qnum */
	struct ATH_TQ_STRUCT sc_txtq;		/* tx intr tasklet */
	u_int8_t sc_grppoll_str[GRPPOLL_RATE_STR_LEN];
	struct ath_descdma sc_bdma;		/* beacon descriptors */
	ath_bufhead sc_bbuf;			/* beacon buffers */
	u_int sc_bhalq;				/* HAL q for outgoing beacons */
	u_int sc_bmisscount;			/* missed beacon transmits */
	u_int32_t sc_ant_tx[8];			/* recent tx frames/antenna */
	struct ath_txq *sc_cabq;		/* tx q for cab frames */
	struct ath_txq sc_grpplq;		/* tx q for XR group polls */
	struct ath_txq *sc_xrtxq;		/* tx q for XR data */
	struct ath_descdma sc_grppolldma;	/* TX descriptors for grppoll */
	ath_bufhead sc_grppollbuf;		/* transmit buffers for grouppoll  */
	u_int16_t sc_xrpollint;			/* xr poll interval */
	u_int16_t sc_xrpollcount;		/* xr poll count */
	struct ath_txq *sc_uapsdq;		/* tx q for uapsd */
	struct ATH_TQ_STRUCT sc_bmisstq;	/* bmiss intr tasklet */
	struct ATH_TQ_STRUCT sc_bstucktq;	/* beacon stuck intr tasklet */
	enum {
		OK,				/* no change needed */
		UPDATE,				/* update pending */
		COMMIT				/* beacon sent, commit change */
	} sc_updateslot;			/* slot time update fsm */
	int sc_slotupdate;			/* slot to next advance fsm */
	struct ieee80211vap *sc_bslot[ATH_BCBUF];/* beacon xmit slots */
	int sc_bnext;				/* next slot for beacon xmit */

	struct timer_list sc_cal_ch;		/* calibration timer */
	HAL_NODE_STATS sc_halstats;		/* station-mode rssi stats */

	struct ctl_table_header *sc_sysctl_header;
	struct ctl_table *sc_sysctls;

	u_int16_t sc_reapcount;  		/* # of tx buffers reaped after net dev stopped */
	struct timer_list sc_mib_enable;

#ifdef ATH_REVERSE_ENGINEERING
	u_int8_t register_snapshot[MAX_REGISTER_ADDRESS];
#endif /* #ifdef ATH_REVERSE_ENGINEERING */

#ifdef ATH_SUPERG_DYNTURBO
	struct timer_list sc_dturbo_switch_mode;/* AP scan timer */
	u_int32_t sc_dturbo_tcount;		/* beacon intval count */
	u_int32_t sc_dturbo_hold_max;		/* hold count before switching to base*/
	u_int16_t sc_dturbo_hold_count;		/* hold count before switching to base*/
	u_int16_t sc_dturbo_turbo_tmin;		/* min turbo count */
	u_int32_t sc_dturbo_bytes;		/* bandwidth stats */
	u_int32_t sc_dturbo_base_tmin;		/* min time in base */
	u_int32_t sc_dturbo_turbo_tmax;		/* max time in turbo */
	u_int32_t sc_dturbo_bw_base;		/* bandwidth threshold */
	u_int32_t sc_dturbo_bw_turbo;		/* bandwidth threshold */
#endif
	u_int sc_slottimeconf;			/* manual override for slottime */
	u_int64_t sc_tsf;			/* TSF at last rx interrupt */
	u_int64_t sc_last_tsf;
};

typedef void (*ath_callback) (struct ath_softc *);
#define	ATH_TXQ_SETUP(sc, i)	((sc)->sc_txqsetup & (1 << i))

#define	ATH_TXBUF_LOCK_INIT(_sc)	spin_lock_init(&(_sc)->sc_txbuflock)
#define	ATH_TXBUF_LOCK_DESTROY(_sc)
#define	ATH_TXBUF_LOCK_IRQ(_sc)		do {	\
	unsigned long __txbuflockflags;		\
	spin_lock_irqsave(&(_sc)->sc_txbuflock, __txbuflockflags);
#define	ATH_TXBUF_UNLOCK_IRQ(_sc)		\
	spin_unlock_irqrestore(&(_sc)->sc_txbuflock, __txbuflockflags); \
} while (0)
#define	ATH_TXBUF_UNLOCK_IRQ_EARLY(_sc)		\
	spin_unlock_irqrestore(&(_sc)->sc_txbuflock, __txbuflockflags);

#define	ATH_TXBUF_LOCK_ASSERT(_sc) \
	KASSERT(spin_is_locked(&(_sc)->sc_txbuflock), ("txbuf not locked!"))


#define	ATH_RXBUF_LOCK_INIT(_sc)	spin_lock_init(&(_sc)->sc_rxbuflock)
#define	ATH_RXBUF_LOCK_DESTROY(_sc)
#define	ATH_RXBUF_LOCK_IRQ(_sc)		do {	\
	unsigned long __rxbuflockflags;		\
	spin_lock_irqsave(&(_sc)->sc_rxbuflock, __rxbuflockflags);
#define	ATH_RXBUF_UNLOCK_IRQ(_sc)		\
	spin_unlock_irqrestore(&(_sc)->sc_rxbuflock, __rxbuflockflags); \
} while (0)
#define	ATH_RXBUF_UNLOCK_IRQ_EARLY(_sc)		\
	spin_unlock_irqrestore(&(_sc)->sc_rxbuflock, __rxbuflockflags);

/* Protects the device from concurrent accesses */
#define	ATH_LOCK_INIT(_sc)		init_MUTEX(&(_sc)->sc_lock)
#define	ATH_LOCK_DESTROY(_sc)
#define	ATH_LOCK(_sc)			down(&(_sc)->sc_lock)
#define	ATH_UNLOCK(_sc)			up(&(_sc)->sc_lock)

int ath_attach(u_int16_t, struct net_device *, HAL_BUS_TAG);
int ath_detach(struct net_device *);
void ath_resume(struct net_device *);
void ath_suspend(struct net_device *);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
irqreturn_t ath_intr(int, void *);
#else
irqreturn_t ath_intr(int, void *, struct pt_regs *);
#endif
int ath_ioctl_ethtool(struct ath_softc *, int, void __user *);
void bus_read_cachesize(struct ath_softc *, u_int8_t *);
void ath_sysctl_register(void);
void ath_sysctl_unregister(void);

#endif /* _DEV_ATH_ATHVAR_H */