ah.h

madwifi上的atheros无线网卡驱动源码

/*-
 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting, Atheros
 * Communications, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the following conditions are met:
 * 1. The materials contained herein are unmodified and are used
 *    unmodified.
 * 2. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following NO
 *    ''WARRANTY'' disclaimer below (''Disclaimer''), without
 *    modification.
 * 3. Redistributions in binary form must reproduce at minimum a
 *    disclaimer similar to the Disclaimer below and any redistribution
 *    must be conditioned upon including a substantially similar
 *    Disclaimer requirement for further binary redistribution.
 * 4. Neither the names of the above-listed copyright holders nor the
 *    names of any contributors may be used to endorse or promote
 *    product derived from this software without specific prior written
 *    permission.
 *
 * 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: ah.h 2060 2007-02-01 20:25:46Z proski $
 */

#ifndef _ATH_AH_H_
#define _ATH_AH_H_
/*
 * Atheros Hardware Access Layer
 *
 * Clients of the HAL call ath_hal_attach to obtain a reference to an ath_hal
 * structure for use with the device.  Hardware-related operations that
 * follow must call back into the HAL through interface, supplying the
 * reference as the first parameter.
 */

/*
 * Bus i/o type definitions.  We define a platform-independent
 * set of types that are mapped to platform-dependent data for
 * register read/write operations.  We use types that are large
 * enough to hold a pointer; smaller data should fit and only
 * require type coercion to work.  Larger data can be stored
 * elsewhere and a reference passed for the bus tag and/or handle.
 */
typedef void* HAL_SOFTC;		/* pointer to driver/OS state */
typedef void* HAL_BUS_TAG;		/* opaque bus i/o id tag */
typedef void* HAL_BUS_HANDLE;		/* opaque bus i/o handle */

#include "ah_osdep.h"

/*
 * __ahdecl is analogous to _cdecl; it defines the calling
 * convention used within the HAL.  For most systems this
 * can just default to be empty and the compiler will (should)
 * use _cdecl.  For systems where _cdecl is not compatible this
 * must be defined.  See linux/ah_osdep.h for an example.
 */
#ifndef __ahdecl
#define __ahdecl
#endif

/*
 * Status codes that may be returned by the HAL.  Note that
 * interfaces that return a status code set it only when an
 * error occurs--i.e. you cannot check it for success.
 */
typedef enum {
	HAL_OK		= 0,	/* No error */
	HAL_ENXIO	= 1,	/* No hardware present */
	HAL_ENOMEM	= 2,	/* Memory allocation failed */
	HAL_EIO		= 3,	/* Hardware didn't respond as expected */
	HAL_EEMAGIC	= 4,	/* EEPROM magic number invalid */
	HAL_EEVERSION	= 5,	/* EEPROM version invalid */
	HAL_EELOCKED	= 6,	/* EEPROM unreadable */
	HAL_EEBADSUM	= 7,	/* EEPROM checksum invalid */
	HAL_EEREAD	= 8,	/* EEPROM read problem */
	HAL_EEBADMAC	= 9,	/* EEPROM mac address invalid */
	HAL_EESIZE	= 10,	/* EEPROM size not supported */
	HAL_EEWRITE	= 11,	/* Attempt to change write-locked EEPROM */
	HAL_EINVAL	= 12,	/* Invalid parameter to function */
	HAL_ENOTSUPP	= 13,	/* Hardware revision not supported */
	HAL_ESELFTEST	= 14,	/* Hardware self-test failed */
	HAL_EINPROGRESS	= 15,	/* Operation incomplete */
} HAL_STATUS;

typedef enum {
	AH_FALSE = 0,		/* NB: lots of code assumes false is zero */
	AH_TRUE  = 1,
} HAL_BOOL;

typedef enum {
	HAL_CAP_REG_DMN		= 0,	/* current regulatory domain */
	HAL_CAP_CIPHER		= 1,	/* hardware supports cipher */
	HAL_CAP_TKIP_MIC	= 2,	/* handle TKIP MIC in hardware */
	HAL_CAP_TKIP_SPLIT	= 3,	/* hardware TKIP uses split keys */
	HAL_CAP_PHYCOUNTERS	= 4,	/* hardware PHY error counters */
	HAL_CAP_DIVERSITY	= 5,	/* hardware supports fast diversity */
	HAL_CAP_KEYCACHE_SIZE	= 6,	/* number of entries in key cache */
	HAL_CAP_NUM_TXQUEUES	= 7,	/* number of hardware xmit queues */
	HAL_CAP_VEOL		= 9,	/* hardware supports virtual EOL */
	HAL_CAP_PSPOLL		= 10,	/* hardware has working PS-Poll support */
	HAL_CAP_DIAG		= 11,	/* hardware diagnostic support */
	HAL_CAP_COMPRESSION	= 12,	/* hardware supports compression */
	HAL_CAP_BURST		= 13,	/* hardware supports packet bursting */
	HAL_CAP_FASTFRAME	= 14,	/* hardware supoprts fast frames */
	HAL_CAP_TXPOW		= 15,	/* global tx power limit  */
	HAL_CAP_TPC		= 16,	/* per-packet tx power control  */
	HAL_CAP_PHYDIAG		= 17,	/* hardware phy error diagnostic */
	HAL_CAP_BSSIDMASK	= 18,	/* hardware supports bssid mask */
	HAL_CAP_MCAST_KEYSRCH	= 19,	/* hardware has multicast key search */
	HAL_CAP_TSF_ADJUST	= 20,	/* hardware has beacon tsf adjust */
	HAL_CAP_XR		= 21,	/* hardware has XR support  */
	HAL_CAP_WME_TKIPMIC 	= 22,   /* hardware can support TKIP MIC when WMM is turned on */
	HAL_CAP_CHAN_HALFRATE 	= 23,	/* hardware can support half rate channels */
	HAL_CAP_CHAN_QUARTERRATE = 24,	/* hardware can support quarter rate channels */
	HAL_CAP_RFSILENT	= 25,	/* hardware has rfsilent support  */
	HAL_CAP_TPC_ACK		= 26,	/* ack txpower with per-packet tpc */
	HAL_CAP_TPC_CTS		= 27,	/* cts txpower with per-packet tpc */
	HAL_CAP_11D		= 28,   /* 11d beacon support for changing cc */
	HAL_CAP_INTMIT		= 29,	/* interference mitigation */
	HAL_CAP_RXORN_FATAL	= 30,	/* HAL_INT_RXORN treated as fatal */
} HAL_CAPABILITY_TYPE;

/* 
 * "States" for setting the LED.  These correspond to
 * the possible 802.11 operational states and there may
 * be a many-to-one mapping between these states and the
 * actual hardware state for the LED's (i.e. the hardware
 * may have fewer states).
 */
typedef enum {
	HAL_LED_INIT	= 0,
	HAL_LED_SCAN	= 1,
	HAL_LED_AUTH	= 2,
	HAL_LED_ASSOC	= 3,
	HAL_LED_RUN	= 4
} HAL_LED_STATE;

/*
 * Transmit queue types/numbers.  These are used to tag
 * each transmit queue in the hardware and to identify a set
 * of transmit queues for operations such as start/stop dma.
 */
typedef enum {
	HAL_TX_QUEUE_INACTIVE	= 0,		/* queue is inactive/unused */
	HAL_TX_QUEUE_DATA	= 1,		/* data xmit q's */
	HAL_TX_QUEUE_BEACON	= 2,		/* beacon xmit q */
	HAL_TX_QUEUE_CAB	= 3,		/* "crap after beacon" xmit q */
	HAL_TX_QUEUE_UAPSD	= 4,		/* u-apsd power save xmit q */
} HAL_TX_QUEUE;

#define	HAL_NUM_TX_QUEUES	10		/* max possible # of queues */

/*
 * Transmit queue subtype.  These map directly to
 * WME Access Categories (except for UPSD).  Refer
 * to Table 5 of the WME spec.
 */
typedef enum {
	HAL_WME_AC_BK	= 0,			/* background access category */
	HAL_WME_AC_BE	= 1, 			/* best effort access category*/
	HAL_WME_AC_VI	= 2,			/* video access category */
	HAL_WME_AC_VO	= 3,			/* voice access category */
	HAL_WME_UPSD	= 4,			/* uplink power save */
	HAL_XR_DATA	= 5,			/* uplink power save */
} HAL_TX_QUEUE_SUBTYPE;

/*
 * Transmit queue flags that control various
 * operational parameters.
 */
typedef enum {
	/*
	 * Per queue interrupt enables.  When set the associated
	 * interrupt may be delivered for packets sent through
	 * the queue.  Without these enabled no interrupts will
	 * be delivered for transmits through the queue.
	 */
	HAL_TXQ_TXOKINT_ENABLE	   = 0x0001,	/* enable TXOK interrupt */
	HAL_TXQ_TXERRINT_ENABLE	   = 0x0001,	/* enable TXERR interrupt */
	HAL_TXQ_TXDESCINT_ENABLE   = 0x0002,	/* enable TXDESC interrupt */
	HAL_TXQ_TXEOLINT_ENABLE	   = 0x0004,	/* enable TXEOL interrupt */
	HAL_TXQ_TXURNINT_ENABLE	   = 0x0008,	/* enable TXURN interrupt */
	/*
	 * Enable hardware compression for packets sent through
	 * the queue.  The compression buffer must be setup and
	 * packets must have a key entry marked in the tx descriptor.
	 */
	HAL_TXQ_COMPRESSION_ENABLE  = 0x0010,	/* enable h/w compression */
	/*
	 * Disable queue when veol is hit or ready time expires.
	 * By default the queue is disabled only on reaching the
	 * physical end of queue (i.e. a null link ptr in the
	 * descriptor chain).
	 */
	HAL_TXQ_RDYTIME_EXP_POLICY_ENABLE = 0x0020,
	/*
	 * Schedule frames on delivery of a DBA (DMA Beacon Alert)
	 * event.  Frames will be transmitted only when this timer
	 * fires, e.g to transmit a beacon in ap or adhoc modes.
	 */
	HAL_TXQ_DBA_GATED	    = 0x0040,	/* schedule based on DBA */
	/*
	 * Each transmit queue has a counter that is incremented
	 * each time the queue is enabled and decremented when
	 * the list of frames to transmit is traversed (or when
	 * the ready time for the queue expires).  This counter
	 * must be non-zero for frames to be scheduled for
	 * transmission.  The following controls disable bumping
	 * this counter under certain conditions.  Typically this
	 * is used to gate frames based on the contents of another
	 * queue (e.g. CAB traffic may only follow a beacon frame).
	 * These are meaningful only when frames are scheduled
	 * with a non-ASAP policy (e.g. DBA-gated).
	 */
	HAL_TXQ_CBR_DIS_QEMPTY	    = 0x0080,	/* disable on this q empty */
	HAL_TXQ_CBR_DIS_BEMPTY	    = 0x0100,	/* disable on beacon q empty */

	/*
	 * Fragment burst backoff policy.  Normally the no backoff
	 * is done after a successful transmission, the next fragment
	 * is sent at SIFS.  If this flag is set backoff is done
	 * after each fragment, regardless whether it was ack'd or
	 * not, after the backoff count reaches zero a normal channel
	 * access procedure is done before the next transmit (i.e.
	 * wait AIFS instead of SIFS).
	 */
	HAL_TXQ_FRAG_BURST_BACKOFF_ENABLE = 0x00800000,
	/*
	 * Disable post-tx backoff following each frame.
	 */
	HAL_TXQ_BACKOFF_DISABLE	    = 0x00010000, /* disable post backoff  */
	/*
	 * DCU arbiter lockout control.  This controls how
	 * lower priority tx queues are handled with respect to
	 * to a specific queue when multiple queues have frames
	 * to send.  No lockout means lower priority queues arbitrate
	 * concurrently with this queue.  Intra-frame lockout
	 * means lower priority queues are locked out until the
	 * current frame transmits (e.g. including backoffs and bursting).
	 * Global lockout means nothing lower can arbitrary so
	 * long as there is traffic activity on this queue (frames,
	 * backoff, etc).
	 */
	HAL_TXQ_ARB_LOCKOUT_INTRA   = 0x00020000, /* intra-frame lockout */
	HAL_TXQ_ARB_LOCKOUT_GLOBAL  = 0x00040000, /* full lockout s */

	HAL_TXQ_IGNORE_VIRTCOL	    = 0x00080000, /* ignore virt collisions */
	HAL_TXQ_SEQNUM_INC_DIS	    = 0x00100000, /* disable seqnum increment */
} HAL_TX_QUEUE_FLAGS;

typedef struct {
	u_int32_t	tqi_ver;		/* hal TXQ version */
	HAL_TX_QUEUE_SUBTYPE tqi_subtype;	/* subtype if applicable */
	HAL_TX_QUEUE_FLAGS tqi_qflags;		/* flags (see above) */
	u_int32_t	tqi_priority;		/* (not used) */
	u_int32_t	tqi_aifs;		/* aifs */
	u_int32_t	tqi_cwmin;		/* cwMin */
	u_int32_t	tqi_cwmax;		/* cwMax */
	u_int16_t	tqi_shretry;		/* rts retry limit */
	u_int16_t	tqi_lgretry;		/* long retry limit (not used)*/
	u_int32_t	tqi_cbrPeriod;		/* CBR period (us) */
	u_int32_t	tqi_cbrOverflowLimit;	/* threshold for CBROVF int */
	u_int32_t	tqi_burstTime;		/* max burst duration (us) */
	u_int32_t	tqi_readyTime;		/* frame schedule time (us) */
	u_int32_t	tqi_compBuf;		/* comp buffer phys addr */
} HAL_TXQ_INFO;

#define HAL_TQI_NONVAL 0xffff

/* token to use for aifs, cwmin, cwmax */
#define	HAL_TXQ_USEDEFAULT	((u_int32_t) -1)

/* compression definitions */
#define HAL_COMP_BUF_MAX_SIZE           9216            /* 9K */
#define HAL_COMP_BUF_ALIGN_SIZE         512

/*
 * Transmit packet types.  This belongs in ah_desc.h, but
 * is here so we can give a proper type to various parameters
 * (and not require everyone include the file).