path: root/sys/dev/stge/if_stgereg.h

/*	$NetBSD: if_stgereg.h,v 1.3 2003/02/10 21:10:07 christos Exp $	*/

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
 */

/* $FreeBSD$ */

/*
 * Sundance Technology PCI vendor ID
 */
#define	VENDOR_SUNDANCETI	0x13f0

/*
 * Tamarack Microelectronics PCI vendor ID
 */
#define	VENDOR_TAMARACK		0x143d

/*
 * D-Link Systems PCI vendor ID
 */
#define	VENDOR_DLINK		0x1186

/*
 * Antares Microsystems PCI vendor ID
 */
#define	VENDOR_ANTARES		0x1754

/*
 * Sundance Technology device ID
 */
#define	DEVICEID_SUNDANCETI_ST1023	0x1023
#define	DEVICEID_SUNDANCETI_ST2021	0x2021
#define	DEVICEID_TAMARACK_TC9021	0x1021
#define	DEVICEID_TAMARACK_TC9021_ALT	0x9021

/*
 * D-Link Systems device ID
 */
#define	DEVICEID_DLINK_DL4000		0x4000

/*
 * Antares Microsystems device ID
 */
#define	DEVICEID_ANTARES_TC9021		0x1021

/*
 * Register description for the Sundance Tech. TC9021 10/100/1000
 * Ethernet controller.
 *
 * Note that while DMA addresses are all in 64-bit fields, only
 * the lower 40 bits of a DMA address are valid.
 */
#if (BUS_SPACE_MAXADDR < 0xFFFFFFFFFF)
#define	STGE_DMA_MAXADDR	BUS_SPACE_MAXADDR
#else
#define	STGE_DMA_MAXADDR	0xFFFFFFFFFF
#endif

/*
 * Register access macros
 */
#define CSR_WRITE_4(_sc, reg, val)	\
	bus_write_4((_sc)->sc_res[0], (reg), (val))
#define CSR_WRITE_2(_sc, reg, val)	\
	bus_write_2((_sc)->sc_res[0], (reg), (val))
#define CSR_WRITE_1(_sc, reg, val)	\
	bus_write_1((_sc)->sc_res[0], (reg), (val))

#define CSR_READ_4(_sc, reg)		\
	bus_read_4((_sc)->sc_res[0], (reg))
#define CSR_READ_2(_sc, reg)		\
	bus_read_2((_sc)->sc_res[0], (reg))
#define CSR_READ_1(_sc, reg)		\
	bus_read_1((_sc)->sc_res[0], (reg))

/*
 * TC9021 buffer fragment descriptor.
 */
struct stge_frag {
	uint64_t	frag_word0;	/* address, length */
};

#define	FRAG_ADDR(x)	(((uint64_t)(x)) << 0)
#define	FRAG_ADDR_MASK	FRAG_ADDR(0xfffffffffULL)
#define	FRAG_LEN(x)	(((uint64_t)(x)) << 48)
#define	FRAG_LEN_MASK	FRAG_LEN(0xffffULL)

/*
 * TC9021 Transmit Frame Descriptor.  Note the number of fragments
 * here is arbitrary, but we can't have any more than 15.
 */
#define	STGE_NTXFRAGS	15
struct stge_tfd {
	uint64_t	tfd_next;	/* next TFD in list */
	uint64_t	tfd_control;	/* control bits */
					/* the buffer fragments */
	struct stge_frag tfd_frags[STGE_NTXFRAGS];
};

#define	TFD_FrameId(x)		((x) << 0)
#define	TFD_FrameId_MAX		0xffff
#define	TFD_WordAlign(x)	((x) << 16)
#define	TFD_WordAlign_dword	0		/* align to dword in TxFIFO */
#define	TFD_WordAlign_word	2		/* align to word in TxFIFO */
#define	TFD_WordAlign_disable	1		/* disable alignment */
#define	TFD_TCPChecksumEnable	(1ULL << 18)
#define	TFD_UDPChecksumEnable	(1ULL << 19)
#define	TFD_IPChecksumEnable	(1ULL << 20)
#define	TFD_FcsAppendDisable	(1ULL << 21)
#define	TFD_TxIndicate		(1ULL << 22)
#define	TFD_TxDMAIndicate	(1ULL << 23)
#define	TFD_FragCount(x)	((x) << 24)
#define	TFD_VLANTagInsert	(1ULL << 28)
#define	TFD_TFDDone		(1ULL << 31)
#define	TFD_VID(x)		(((uint64_t)(x)) << 32)
#define	TFD_CFI			(1ULL << 44)
#define	TFD_UserPriority(x)	(((uint64_t)(x)) << 45)

/*
 * TC9021 Receive Frame Descriptor.  Each RFD has a single fragment
 * in it, and the chip tells us the beginning and end of the frame.
 */
struct stge_rfd {
	uint64_t	rfd_next;	/* next RFD in list */
	uint64_t	rfd_status;	/* status bits */
	struct stge_frag rfd_frag;	/* the buffer */
};

/* Low word of rfd_status */
#define RFD_RxStatus(x)		((x) & 0xffffffff)
#define	RFD_RxDMAFrameLen(x)	((x) & 0xffff)
#define	RFD_RxFIFOOverrun	0x00010000
#define	RFD_RxRuntFrame		0x00020000
#define	RFD_RxAlignmentError	0x00040000
#define	RFD_RxFCSError		0x00080000
#define	RFD_RxOversizedFrame	0x00100000
#define	RFD_RxLengthError	0x00200000
#define	RFD_VLANDetected	0x00400000
#define	RFD_TCPDetected		0x00800000
#define	RFD_TCPError		0x01000000
#define	RFD_UDPDetected		0x02000000
#define	RFD_UDPError		0x04000000
#define	RFD_IPDetected		0x08000000
#define	RFD_IPError		0x10000000
#define	RFD_FrameStart		0x20000000
#define	RFD_FrameEnd		0x40000000
#define	RFD_RFDDone		0x80000000
/* High word of rfd_status */
#define	RFD_TCI(x)		((((uint64_t)(x)) >> 32) & 0xffff)

/*
 * EEPROM offsets.
 */
#define	STGE_EEPROM_ConfigParam		0x00
#define	STGE_EEPROM_AsicCtrl		0x01
#define	STGE_EEPROM_SubSystemVendorId	0x02
#define	STGE_EEPROM_SubSystemId		0x03
#define	STGE_EEPROM_LEDMode		0x06
#define	STGE_EEPROM_StationAddress0	0x10
#define	STGE_EEPROM_StationAddress1	0x11
#define	STGE_EEPROM_StationAddress2	0x12

/*
 * The TC9021 register space.
 */

#define	STGE_DMACtrl			0x00
#define	DMAC_RxDMAComplete		(1U << 3)
#define	DMAC_RxDMAPollNow		(1U << 4)
#define	DMAC_TxDMAComplete		(1U << 11)
#define	DMAC_TxDMAPollNow		(1U << 12)
#define	DMAC_TxDMAInProg		(1U << 15)
#define	DMAC_RxEarlyDisable		(1U << 16)
#define	DMAC_MWIDisable			(1U << 18)
#define	DMAC_TxWriteBackDisable		(1U << 19)
#define	DMAC_TxBurstLimit(x)		((x) << 20)
#define	DMAC_TargetAbort		(1U << 30)
#define	DMAC_MasterAbort		(1U << 31)

#define	STGE_RxDMAStatus		0x08

#define	STGE_TFDListPtrLo		0x10

#define	STGE_TFDListPtrHi		0x14

#define	STGE_TxDMABurstThresh		0x18	/* 8-bit */

#define	STGE_TxDMAUrgentThresh		0x19	/* 8-bit */

#define	STGE_TxDMAPollPeriod		0x1a	/* 8-bit, 320ns increments */

#define	STGE_RFDListPtrLo		0x1c

#define	STGE_RFDListPtrHi		0x20

#define	STGE_RxDMABurstThresh		0x24	/* 8-bit */

#define	STGE_RxDMAUrgentThresh		0x25	/* 8-bit */

#define	STGE_RxDMAPollPeriod		0x26	/* 8-bit, 320ns increments */

#define	STGE_RxDMAIntCtrl		0x28
#define	RDIC_RxFrameCount(x)		((x) & 0xff)
#define	RDIC_PriorityThresh(x)		((x) << 10)
#define	RDIC_RxDMAWaitTime(x)		((x) << 16)
/*
 * Number of receive frames transferred via DMA before a Rx interrupt is issued.
 */
#define	STGE_RXINT_NFRAME_DEFAULT	8
#define	STGE_RXINT_NFRAME_MIN		1
#define	STGE_RXINT_NFRAME_MAX		255
/*
 * Maximum amount of time (in 64ns increments) to wait before issuing a Rx
 * interrupt if number of frames recevied is less than STGE_RXINT_NFRAME
 * (STGE_RXINT_NFRAME_MIN <= STGE_RXINT_NFRAME <= STGE_RXINT_NFRAME_MAX)
 */
#define	STGE_RXINT_DMAWAIT_DEFAULT	30	/* 30us */
#define	STGE_RXINT_DMAWAIT_MIN		0
#define	STGE_RXINT_DMAWAIT_MAX		4194
#define	STGE_RXINT_USECS2TICK(x)	(((x) * 1000)/64)

#define	STGE_DebugCtrl			0x2c	/* 16-bit */
#define	DC_GPIO0Ctrl			(1U << 0)
#define	DC_GPIO1Ctrl			(1U << 1)
#define	DC_GPIO0			(1U << 2)
#define	DC_GPIO1			(1U << 3)

#define	STGE_AsicCtrl			0x30
#define	AC_ExpRomDisable		(1U << 0)
#define	AC_ExpRomSize			(1U << 1)
#define	AC_PhySpeed10			(1U << 4)
#define	AC_PhySpeed100			(1U << 5)
#define	AC_PhySpeed1000			(1U << 6)
#define	AC_PhyMedia			(1U << 7)
#define	AC_ForcedConfig(x)		((x) << 8)
#define	AC_ForcedConfig_MASK		AC_ForcedConfig(7)
#define	AC_D3ResetDisable		(1U << 11)
#define	AC_SpeedupMode			(1U << 13)
#define	AC_LEDMode			(1U << 14)
#define	AC_RstOutPolarity		(1U << 15)
#define	AC_GlobalReset			(1U << 16)
#define	AC_RxReset			(1U << 17)
#define	AC_TxReset			(1U << 18)
#define	AC_DMA				(1U << 19)
#define	AC_FIFO				(1U << 20)
#define	AC_Network			(1U << 21)
#define	AC_Host				(1U << 22)
#define	AC_AutoInit			(1U << 23)
#define	AC_RstOut			(1U << 24)
#define	AC_InterruptRequest		(1U << 25)
#define	AC_ResetBusy			(1U << 26)
#define	AC_LEDSpeed			(1U << 27)
#define	AC_LEDModeBit1			(1U << 29)

#define	STGE_FIFOCtrl			0x38	/* 16-bit */
#define	FC_RAMTestMode			(1U << 0)
#define	FC_Transmitting			(1U << 14)
#define	FC_Receiving			(1U << 15)

#define	STGE_RxEarlyThresh		0x3a	/* 16-bit */

#define	STGE_FlowOffThresh		0x3c	/* 16-bit */

#define	STGE_FlowOnTresh		0x3e	/* 16-bit */

#define	STGE_TxStartThresh		0x44	/* 16-bit */

#define	STGE_EepromData			0x48	/* 16-bit */

#define	STGE_EepromCtrl			0x4a	/* 16-bit */
#define	EC_EepromAddress(x)		((x) & 0xff)
#define	EC_EepromOpcode(x)		((x) << 8)
#define	EC_OP_WE			0
#define	EC_OP_WR			1
#define	EC_OP_RR			2
#define	EC_OP_ER			3
#define	EC_EepromBusy			(1U << 15)

#define	STGE_ExpRomAddr			0x4c

#define	STGE_ExpRomData			0x50	/* 8-bit */

#define	STGE_WakeEvent			0x51	/* 8-bit */

#define	STGE_Countdown			0x54
#define	CD_Count(x)			((x) & 0xffff)
#define	CD_CountdownSpeed		(1U << 24)
#define	CD_CountdownMode		(1U << 25)
#define	CD_CountdownIntEnabled		(1U << 26)

#define	STGE_IntStatusAck		0x5a	/* 16-bit */

#define	STGE_IntEnable			0x5c	/* 16-bit */

#define	STGE_IntStatus			0x5e	/* 16-bit */

#define	IS_InterruptStatus		(1U << 0)
#define	IS_HostError			(1U << 1)
#define	IS_TxComplete			(1U << 2)
#define	IS_MACControlFrame		(1U << 3)
#define	IS_RxComplete			(1U << 4)
#define	IS_RxEarly			(1U << 5)
#define	IS_InRequested			(1U << 6)
#define	IS_UpdateStats			(1U << 7)
#define	IS_LinkEvent			(1U << 8)
#define	IS_TxDMAComplete		(1U << 9)
#define	IS_RxDMAComplete		(1U << 10)
#define	IS_RFDListEnd			(1U << 11)
#define	IS_RxDMAPriority		(1U << 12)

#define	STGE_TxStatus			0x60
#define	TS_TxError			(1U << 0)
#define	TS_LateCollision		(1U << 2)
#define	TS_MaxCollisions		(1U << 3)
#define	TS_TxUnderrun			(1U << 4)
#define	TS_TxIndicateReqd		(1U << 6)
#define	TS_TxComplete			(1U << 7)
#define	TS_TxFrameId_get(x)		((x) >> 16)

#define	STGE_MACCtrl			0x6c
#define	MC_IFSSelect(x)			((x) & 3)
#define	MC_IFS96bit			0
#define	MC_IFS1024bit			1
#define	MC_IFS1792bit			2
#define	MC_IFS4352bit			3

#define	MC_DuplexSelect			(1U << 5)
#define	MC_RcvLargeFrames		(1U << 6)
#define	MC_TxFlowControlEnable		(1U << 7)
#define	MC_RxFlowControlEnable		(1U << 8)
#define	MC_RcvFCS			(1U << 9)
#define	MC_FIFOLoopback			(1U << 10)
#define	MC_MACLoopback			(1U << 11)
#define	MC_AutoVLANtagging		(1U << 12)
#define	MC_AutoVLANuntagging		(1U << 13)
#define	MC_CollisionDetect		(1U << 16)
#define	MC_CarrierSense			(1U << 17)
#define	MC_StatisticsEnable		(1U << 21)
#define	MC_StatisticsDisable		(1U << 22)
#define	MC_StatisticsEnabled		(1U << 23)
#define	MC_TxEnable			(1U << 24)
#define	MC_TxDisable			(1U << 25)
#define	MC_TxEnabled			(1U << 26)
#define	MC_RxEnable			(1U << 27)
#define	MC_RxDisable			(1U << 28)
#define	MC_RxEnabled			(1U << 29)
#define	MC_Paused			(1U << 30)
#define	MC_MASK				0x7fe33fa3

#define	STGE_VLANTag			0x70

#define STGE_PhySet			0x75	/* 8-bit */
#define	PS_MemLenb9b			(1U << 0)
#define	PS_MemLen			(1U << 1)
#define	PS_NonCompdet			(1U << 2)

#define	STGE_PhyCtrl			0x76	/* 8-bit */
#define	PC_MgmtClk			(1U << 0)
#define	PC_MgmtData			(1U << 1)
#define	PC_MgmtDir			(1U << 2)	/* MAC->PHY */
#define	PC_PhyDuplexPolarity		(1U << 3)
#define	PC_PhyDuplexStatus		(1U << 4)
#define	PC_PhyLnkPolarity		(1U << 5)
#define	PC_LinkSpeed(x)			(((x) >> 6) & 3)
#define	PC_LinkSpeed_Down		0
#define	PC_LinkSpeed_10			1
#define	PC_LinkSpeed_100		2
#define	PC_LinkSpeed_1000		3

#define	STGE_StationAddress0		0x78	/* 16-bit */

#define	STGE_StationAddress1		0x7a	/* 16-bit */

#define	STGE_StationAddress2		0x7c	/* 16-bit */

#define	STGE_VLANHashTable		0x7e	/* 16-bit */

#define	STGE_VLANId			0x80

#define	STGE_MaxFrameSize		0x86

#define	STGE_ReceiveMode		0x88	/* 16-bit */
#define	RM_ReceiveUnicast		(1U << 0)
#define	RM_ReceiveMulticast		(1U << 1)
#define	RM_ReceiveBroadcast		(1U << 2)
#define	RM_ReceiveAllFrames		(1U << 3)
#define	RM_ReceiveMulticastHash		(1U << 4)
#define	RM_ReceiveIPMulticast		(1U << 5)
#define	RM_ReceiveVLANMatch		(1U << 8)
#define	RM_ReceiveVLANHash		(1U << 9)

#define	STGE_HashTable0			0x8c

#define	STGE_HashTable1			0x90

#define	STGE_RMONStatisticsMask		0x98	/* set to disable */

#define	STGE_StatisticsMask		0x9c	/* set to disable */

#define	STGE_RxJumboFrames		0xbc	/* 16-bit */

#define	STGE_TCPCheckSumErrors		0xc0	/* 16-bit */

#define	STGE_IPCheckSumErrors		0xc2	/* 16-bit */

#define	STGE_UDPCheckSumErrors		0xc4	/* 16-bit */

#define	STGE_TxJumboFrames		0xf4	/* 16-bit */

/*
 * TC9021 statistics.  Available memory and I/O mapped.
 */

#define	STGE_OctetRcvOk			0xa8

#define	STGE_McstOctetRcvdOk		0xac

#define	STGE_BcstOctetRcvdOk		0xb0

#define	STGE_FramesRcvdOk		0xb4

#define	STGE_McstFramesRcvdOk		0xb8

#define	STGE_BcstFramesRcvdOk		0xbe	/* 16-bit */

#define	STGE_MacControlFramesRcvd	0xc6	/* 16-bit */

#define	STGE_FrameTooLongErrors		0xc8	/* 16-bit */

#define	STGE_InRangeLengthErrors	0xca	/* 16-bit */

#define	STGE_FramesCheckSeqErrors	0xcc	/* 16-bit */

#define	STGE_FramesLostRxErrors		0xce	/* 16-bit */

#define	STGE_OctetXmtdOk		0xd0

#define	STGE_McstOctetXmtdOk		0xd4

#define	STGE_BcstOctetXmtdOk		0xd8

#define	STGE_FramesXmtdOk		0xdc

#define	STGE_McstFramesXmtdOk		0xe0

#define	STGE_FramesWDeferredXmt		0xe4

#define	STGE_LateCollisions		0xe8

#define	STGE_MultiColFrames		0xec

#define	STGE_SingleColFrames		0xf0

#define	STGE_BcstFramesXmtdOk		0xf6	/* 16-bit */

#define	STGE_CarrierSenseErrors		0xf8	/* 16-bit */

#define	STGE_MacControlFramesXmtd	0xfa	/* 16-bit */

#define	STGE_FramesAbortXSColls		0xfc	/* 16-bit */

#define	STGE_FramesWEXDeferal		0xfe	/* 16-bit */

/*
 * RMON-compatible statistics.  Only accessible if memory-mapped.
 */

#define	STGE_EtherStatsCollisions			0x100

#define	STGE_EtherStatsOctetsTransmit			0x104

#define	STGE_EtherStatsPktsTransmit			0x108

#define	STGE_EtherStatsPkts64OctetsTransmit		0x10c

#define	STGE_EtherStatsPkts64to127OctetsTransmit	0x110

#define	STGE_EtherStatsPkts128to255OctetsTransmit	0x114

#define	STGE_EtherStatsPkts256to511OctetsTransmit	0x118

#define	STGE_EtherStatsPkts512to1023OctetsTransmit	0x11c

#define	STGE_EtherStatsPkts1024to1518OctetsTransmit	0x120

#define	STGE_EtherStatsCRCAlignErrors			0x124

#define	STGE_EtherStatsUndersizePkts			0x128

#define	STGE_EtherStatsFragments			0x12c

#define	STGE_EtherStatsJabbers				0x130

#define	STGE_EtherStatsOctets				0x134

#define	STGE_EtherStatsPkts				0x138

#define	STGE_EtherStatsPkts64Octets			0x13c

#define	STGE_EtherStatsPkts65to127Octets		0x140

#define	STGE_EtherStatsPkts128to255Octets		0x144

#define	STGE_EtherStatsPkts256to511Octets		0x148

#define	STGE_EtherStatsPkts512to1023Octets		0x14c

#define	STGE_EtherStatsPkts1024to1518Octets		0x150

/*
 * Transmit descriptor list size.
 */
#define	STGE_TX_RING_CNT	256
#define	STGE_TX_LOWAT		(STGE_TX_RING_CNT/32)
#define	STGE_TX_HIWAT		(STGE_TX_RING_CNT - STGE_TX_LOWAT)

/*
 * Receive descriptor list size.
 */
#define	STGE_RX_RING_CNT	256

#define	STGE_MAXTXSEGS		STGE_NTXFRAGS

#define STGE_JUMBO_FRAMELEN	9022
#define STGE_JUMBO_MTU	\
	(STGE_JUMBO_FRAMELEN - ETHER_HDR_LEN - ETHER_CRC_LEN)

struct stge_txdesc {
	struct mbuf *tx_m;		/* head of our mbuf chain */
	bus_dmamap_t tx_dmamap;		/* our DMA map */
	STAILQ_ENTRY(stge_txdesc) tx_q;
};

STAILQ_HEAD(stge_txdq, stge_txdesc);

struct stge_rxdesc {
	struct mbuf *rx_m;
	bus_dmamap_t rx_dmamap;
};

#define	STGE_ADDR_LO(x)		((u_int64_t) (x) & 0xffffffff)
#define	STGE_ADDR_HI(x)		((u_int64_t) (x) >> 32)

#define	STGE_RING_ALIGN		8

struct stge_chain_data{
	bus_dma_tag_t		stge_parent_tag;
	bus_dma_tag_t		stge_tx_tag;
	struct stge_txdesc	stge_txdesc[STGE_TX_RING_CNT];
	struct stge_txdq	stge_txfreeq;
	struct stge_txdq	stge_txbusyq;
	bus_dma_tag_t		stge_rx_tag;
	struct stge_rxdesc	stge_rxdesc[STGE_RX_RING_CNT];
	bus_dma_tag_t		stge_tx_ring_tag;
	bus_dmamap_t		stge_tx_ring_map;
	bus_dma_tag_t		stge_rx_ring_tag;
	bus_dmamap_t		stge_rx_ring_map;
	bus_dmamap_t		stge_rx_sparemap;

	int			stge_tx_prod;
	int			stge_tx_cons;
	int			stge_tx_cnt;
	int			stge_rx_cons;
#ifdef DEVICE_POLLING
	int			stge_rxcycles;
#endif
	int			stge_rxlen;
	struct mbuf		*stge_rxhead;
	struct mbuf		*stge_rxtail;
};

struct stge_ring_data {
	struct stge_tfd		*stge_tx_ring;
	bus_addr_t		stge_tx_ring_paddr;
	struct stge_rfd		*stge_rx_ring;
	bus_addr_t		stge_rx_ring_paddr;
};

#define STGE_TX_RING_ADDR(sc, i)	\
    ((sc)->sc_rdata.stge_tx_ring_paddr + sizeof(struct stge_tfd) * (i))
#define STGE_RX_RING_ADDR(sc, i)	\
    ((sc)->sc_rdata.stge_rx_ring_paddr + sizeof(struct stge_rfd) * (i))

#define STGE_TX_RING_SZ		\
    (sizeof(struct stge_tfd) * STGE_TX_RING_CNT)
#define STGE_RX_RING_SZ		\
    (sizeof(struct stge_rfd) * STGE_RX_RING_CNT)

/*
 * Software state per device.
 */
struct stge_softc {
	struct ifnet 		*sc_ifp;	/* interface info */
	device_t		sc_dev;
	device_t		sc_miibus;
	struct resource		*sc_res[2];
	struct resource_spec	*sc_spec;
	void			*sc_ih;		/* interrupt cookie */
	int			sc_rev;		/* silicon revision */

	struct callout		sc_tick_ch;	/* tick callout */

	struct stge_chain_data	sc_cdata;
	struct stge_ring_data	sc_rdata;
	int			sc_if_flags;
	int			sc_if_framesize;
	int			sc_txthresh;	/* Tx threshold */
	uint32_t		sc_usefiber:1;	/* if we're fiber */
	uint32_t		sc_stge1023:1;	/* are we a 1023 */
	uint32_t		sc_DMACtrl;	/* prototype DMACtrl reg. */
	uint32_t		sc_MACCtrl;	/* prototype MacCtrl reg. */
	uint16_t		sc_IntEnable;	/* prototype IntEnable reg. */
	uint16_t		sc_led;		/* LED conf. from EEPROM */
	uint8_t			sc_PhyCtrl;	/* prototype PhyCtrl reg. */
	int			sc_suspended;
	int			sc_detach;

	int			sc_rxint_nframe;
	int			sc_rxint_dmawait;
	int			sc_nerr;

	struct task		sc_link_task;
	struct mtx		sc_mii_mtx;	/* MII mutex */
	struct mtx		sc_mtx;
};

#define STGE_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)
#define STGE_UNLOCK(_sc)	mtx_unlock(&(_sc)->sc_mtx)
#define STGE_LOCK_ASSERT(_sc)	mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
#define STGE_MII_LOCK(_sc)	mtx_lock(&(_sc)->sc_mii_mtx)
#define STGE_MII_UNLOCK(_sc)	mtx_unlock(&(_sc)->sc_mii_mtx)

#define	STGE_MAXERR	5

#define	STGE_RXCHAIN_RESET(_sc)						\
do {									\
	(_sc)->sc_cdata.stge_rxhead = NULL;				\
	(_sc)->sc_cdata.stge_rxtail = NULL;				\
	(_sc)->sc_cdata.stge_rxlen = 0;					\
} while (/*CONSTCOND*/0)

#define STGE_TIMEOUT 1000

struct stge_mii_frame {
	uint8_t	mii_stdelim;
	uint8_t	mii_opcode;
	uint8_t	mii_phyaddr;
	uint8_t	mii_regaddr;
	uint8_t	mii_turnaround;
	uint16_t mii_data;
};

/*
 * MII constants
 */
#define STGE_MII_STARTDELIM	0x01
#define STGE_MII_READOP		0x02
#define STGE_MII_WRITEOP	0x01
#define STGE_MII_TURNAROUND	0x02

#define	STGE_RESET_NONE	0x00
#define	STGE_RESET_TX	0x01
#define	STGE_RESET_RX	0x02
#define	STGE_RESET_FULL	0x04