File:  [DragonFly] / src / sys / dev / netif / re / if_rereg.h
Revision 1.24: download - view: text, annotated - select for diffs
Sun Oct 19 06:00:24 2008 UTC (5 years, 6 months ago) by sephe
Branches: MAIN
CVS tags: HEAD
- In re_stop(), call re_reset(), which is supposed to stop TX/RX engines.
- In re_reset(), don't touch 0x82 (a magic CSR), which seems to be 8110/8169
  specific.  Write 1 to it on attach path.
  According-to: RealTek r8169-6.007.00
- For certain chips (looks like all MAC2 chips), RE_CMD_RESET will not stop
  TX/RX engines, a seperate command (RE_CMD_STOPREQ) must be issued before
  RE_CMD_RESET.
  According-to: RealTek r8168-8.008.00

/*
 * Copyright (c) 2004
 *	Joerg Sonnenberger <joerg@bec.de>.  All rights reserved.
 *
 * Copyright (c) 1997, 1998-2003
 *	Bill Paul <wpaul@ctr.columbia.edu>.  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.
 * 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 Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
 * 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: src/sys/pci/if_rlreg.h,v 1.42 2004/05/24 19:39:23 jhb Exp $
 * $DragonFly: src/sys/dev/netif/re/if_rereg.h,v 1.24 2008/10/19 06:00:24 sephe Exp $
 */

/*
 * RealTek 8129/8139 register offsets
 */
#define	RE_IDR0		0x0000		/* ID register 0 (station addr) */
#define	RE_IDR1		0x0001		/* Must use 32-bit accesses (?) */
#define	RE_IDR2		0x0002
#define	RE_IDR3		0x0003
#define	RE_IDR4		0x0004
#define	RE_IDR5		0x0005
					/* 0006-0007 reserved */
#define	RE_MAR0		0x0008		/* Multicast hash table */
#define	RE_MAR1		0x0009
#define	RE_MAR2		0x000A
#define	RE_MAR3		0x000B
#define	RE_MAR4		0x000C
#define	RE_MAR5		0x000D
#define	RE_MAR6		0x000E
#define	RE_MAR7		0x000F

#define RE_RXADDR		0x0030	/* RX ring start address */
#define RE_RX_EARLY_BYTES	0x0034	/* RX early byte count */
#define RE_RX_EARLY_STAT	0x0036	/* RX early status */
#define RE_COMMAND	0x0037		/* command register */
#define RE_CURRXADDR	0x0038		/* current address of packet read */
#define RE_CURRXBUF	0x003A		/* current RX buffer address */
#define RE_IMR		0x003C		/* interrupt mask register */
#define RE_ISR		0x003E		/* interrupt status register */
#define RE_TXCFG	0x0040		/* transmit config */
#define RE_RXCFG	0x0044		/* receive config */
#define RE_TIMERCNT	0x0048		/* timer count register */
#define RE_MISSEDPKT	0x004C		/* missed packet counter */
#define RE_EECMD	0x0050		/* EEPROM command register */
#define RE_CFG0		0x0051		/* config register #0 */
#define RE_CFG1		0x0052		/* config register #1 */
#define RE_CFG2		0x0053		/* config register #2 */
                                        /* 0054-0057 reserved */   
#define RE_MEDIASTAT	0x0058		/* media status register (8139) */
					/* 0059-005A reserved */
#define RE_MII		0x005A		/* 8129 chip only */
#define RE_HALTCLK	0x005B
#define RE_MULTIINTR	0x005C		/* multiple interrupt */
#define RE_PCIREV	0x005E		/* PCI revision value */
					/* 005F reserved */
#define RE_TXSTAT_ALL	0x0060		/* TX status of all descriptors */

/* Direct PHY access registers only available on 8139 */
#define RE_BMCR		0x0062		/* PHY basic mode control */
#define RE_BMSR		0x0064		/* PHY basic mode status */
#define RE_ANAR		0x0066		/* PHY autoneg advert */
#define RE_LPAR		0x0068		/* PHY link partner ability */
#define RE_ANER		0x006A		/* PHY autoneg expansion */

#define RE_DISCCNT	0x006C		/* disconnect counter */
#define RE_FALSECAR	0x006E		/* false carrier counter */
#define RE_NWAYTST	0x0070		/* NWAY test register */
#define RE_RX_ER	0x0072		/* RX_ER counter */
#define RE_CSCFG	0x0074		/* CS configuration register */

/*
 * When operating in special C+ mode, some of the registers in an
 * 8139C+ chip have different definitions. These are also used for
 * the 8169 gigE chip.
 */
#define RE_DUMPSTATS_LO		0x0010	/* counter dump command register */
#define RE_DUMPSTATS_HI		0x0014	/* counter dump command register */
#define RE_TXLIST_ADDR_LO	0x0020	/* 64 bits, 256 byte alignment */
#define RE_TXLIST_ADDR_HI	0x0024	/* 64 bits, 256 byte alignment */
#define RE_TXLIST_ADDR_HPRIO_LO	0x0028	/* 64 bits, 256 byte alignment */
#define RE_TXLIST_ADDR_HPRIO_HI	0x002C	/* 64 bits, 256 byte alignment */
#define RE_CFG2			0x0053
#define RE_TIMERINT		0x0054	/* interrupt on timer expire */
#define RE_TXSTART		0x00D9	/* 8 bits */
#define RE_CPLUS_CMD		0x00E0	/* 16 bits */
#define RE_IM			0x00E2	/* 16 bits */
#define RE_RXLIST_ADDR_LO	0x00E4	/* 64 bits, 256 byte alignment */
#define RE_RXLIST_ADDR_HI	0x00E8	/* 64 bits, 256 byte alignment */
#define RE_EARLY_TX_THRESH	0x00EC	/* 8 bits */

/*
 * Registers specific to the 8169 gigE chip
 */
#define RE_TIMERINT_8169	0x0058	/* different offset than 8139 */
#define RE_PHYAR		0x0060
#define RE_TBICSR		0x0064
#define RE_TBI_ANAR		0x0068
#define RE_TBI_LPAR		0x006A
#define RE_GMEDIASTAT		0x006C	/* 8 bits */
#define RE_MAXRXPKTLEN		0x00DA	/* 16 bits, chip multiplies by 8 */
#define RE_GTXSTART		0x0038	/* 16 bits */

/*
 * TX config register bits
 */
#define RE_TXCFG_CLRABRT	0x00000001	/* retransmit aborted pkt */
#define RE_TXCFG_MAXDMA		0x00000700	/* max DMA burst size */
#define RE_TXCFG_CRCAPPEND	0x00010000	/* CRC append (0 = yes) */
#define RE_TXCFG_LOOPBKTST	0x00060000	/* loopback test */
#define RE_TXCFG_IFG2		0x00080000	/* 8169 only */
#define RE_TXCFG_IFG		0x03000000	/* interframe gap */
#define RE_TXCFG_HWREV		0xFC800000
#define RE_TXCFG_MACMODE	0x00700000

/*
 * Config 2 register bits
 */
#define RE_CFG2_PCICLK_MASK	0x07
#define RE_CFG2_PCICLK_33MHZ	0x00
#define RE_CFG2_PCICLK_66MHZ	0x01
#define RE_CFG2_PCI64		0x08

#define RE_LOOPTEST_OFF		0x00000000
#define RE_LOOPTEST_ON		0x00020000
#define RE_LOOPTEST_ON_CPLUS	0x00060000

#define RE_HWREV_8169		0x00000000
#define RE_HWREV_8110S		0x00800000
#define RE_HWREV_8169S		0x04000000
#define RE_HWREV_8169SB		0x10000000
#define RE_HWREV_8169SC1	0x18000000
#define RE_HWREV_8102EL		0x24800000
#define RE_HWREV_8168D		0x28000000
#define RE_HWREV_8168B1		0x30000000
#define RE_HWREV_8100E		0x30800000
#define RE_HWREV_8101E1		0x34000000
#define RE_HWREV_8102E		0x34800000
#define RE_HWREV_8168B2		0x38000000
#define RE_HWREV_8168C		0x3C000000
#define RE_HWREV_8168CP		0x3C800000
#define RE_HWREV_8139CPLUS	0x74800000
#define RE_HWREV_8169SC2	0x98000000
#define RE_HWREV_8101E2		0xB4000000
#define RE_HWREV_8168B3		0xB8000000
#define RE_HWREV_NULL		0xffffffff

#define RE_TXDMA_16BYTES	0x00000000
#define RE_TXDMA_32BYTES	0x00000100
#define RE_TXDMA_64BYTES	0x00000200
#define RE_TXDMA_128BYTES	0x00000300
#define RE_TXDMA_256BYTES	0x00000400
#define RE_TXDMA_512BYTES	0x00000500
#define RE_TXDMA_1024BYTES	0x00000600
#define RE_TXDMA_2048BYTES	0x00000700

/*
 * Transmit descriptor status register bits.
 */
#define RE_TXSTAT_LENMASK	0x00001FFF
#define RE_TXSTAT_OWN		0x00002000
#define RE_TXSTAT_TX_UNDERRUN	0x00004000
#define RE_TXSTAT_TX_OK		0x00008000
#define RE_TXSTAT_EARLY_THRESH	0x003F0000
#define RE_TXSTAT_COLLCNT	0x0F000000
#define RE_TXSTAT_CARR_HBEAT	0x10000000
#define RE_TXSTAT_OUTOFWIN	0x20000000
#define RE_TXSTAT_TXABRT	0x40000000
#define RE_TXSTAT_CARRLOSS	0x80000000

/*
 * Interrupt status register bits.
 */
#define RE_ISR_RX_OK		0x0001
#define RE_ISR_RX_ERR		0x0002
#define RE_ISR_TX_OK		0x0004
#define RE_ISR_TX_ERR		0x0008
#define RE_ISR_RX_OVERRUN	0x0010
#define RE_ISR_LINKCHG		0x0020	/* 8169 only */
#define RE_ISR_FIFO_OFLOW	0x0040	/* 8139 only */
#define RE_ISR_TX_DESC_UNAVAIL	0x0080	/* C+ only */
#define RE_ISR_SWI		0x0100	/* C+ only */
#define RE_ISR_CABLE_LEN_CHGD	0x2000
#define RE_ISR_TIMEOUT_EXPIRED	0x4000
#define RE_ISR_SYSTEM_ERR	0x8000

#define RE_INTRS \
	(RE_ISR_RX_OK|RE_ISR_RX_ERR|RE_ISR_TX_ERR| \
	RE_ISR_RX_OVERRUN|RE_ISR_FIFO_OFLOW|RE_ISR_LINKCHG| \
	RE_ISR_SYSTEM_ERR|RE_ISR_TX_OK)

#define RE_INTRS_TIMER \
	(RE_ISR_RX_ERR|RE_ISR_TX_ERR| \
	RE_ISR_LINKCHG|RE_ISR_SYSTEM_ERR| \
	RE_ISR_TIMEOUT_EXPIRED)

#ifdef RE_DIAG
#define RE_INTRS_DIAG \
	(RE_ISR_TX_OK|RE_ISR_RX_OK|RE_ISR_RX_ERR|RE_ISR_TX_ERR| \
	RE_ISR_RX_OVERRUN|RE_ISR_FIFO_OFLOW|RE_ISR_LINKCHG| \
	RE_ISR_SYSTEM_ERR)
#endif

/*
 * Media status register. (8139 only)
 */
#define RE_MEDIASTAT_RXPAUSE	0x01
#define RE_MEDIASTAT_TXPAUSE	0x02
#define RE_MEDIASTAT_LINK	0x04
#define RE_MEDIASTAT_SPEED10	0x08
#define RE_MEDIASTAT_RXFLOWCTL	0x40	/* duplex mode */
#define RE_MEDIASTAT_TXFLOWCTL	0x80	/* duplex mode */

/*
 * Receive config register.
 */
#define RE_RXCFG_RX_ALLPHYS	0x00000001	/* accept all nodes */
#define RE_RXCFG_RX_INDIV	0x00000002	/* match filter */
#define RE_RXCFG_RX_MULTI	0x00000004	/* accept all multicast */
#define RE_RXCFG_RX_BROAD	0x00000008	/* accept all broadcast */
#define RE_RXCFG_RX_RUNT	0x00000010
#define RE_RXCFG_RX_ERRPKT	0x00000020
#define RE_RXCFG_WRAP		0x00000080
#define RE_RXCFG_MAXDMA		0x00000700
#define RE_RXCFG_BUFSZ		0x00001800
#define RE_RXCFG_FIFOTHRESH	0x0000E000
#define RE_RXCFG_EARLYTHRESH	0x07000000

#define RE_RXDMA_16BYTES	0x00000000
#define RE_RXDMA_32BYTES	0x00000100
#define RE_RXDMA_64BYTES	0x00000200
#define RE_RXDMA_128BYTES	0x00000300
#define RE_RXDMA_256BYTES	0x00000400
#define RE_RXDMA_512BYTES	0x00000500
#define RE_RXDMA_1024BYTES	0x00000600
#define RE_RXDMA_UNLIMITED	0x00000700

#define RE_RXBUF_8		0x00000000
#define RE_RXBUF_16		0x00000800
#define RE_RXBUF_32		0x00001000
#define RE_RXBUF_64		0x00001800

#define RE_RXFIFO_16BYTES	0x00000000
#define RE_RXFIFO_32BYTES	0x00002000
#define RE_RXFIFO_64BYTES	0x00004000
#define RE_RXFIFO_128BYTES	0x00006000
#define RE_RXFIFO_256BYTES	0x00008000
#define RE_RXFIFO_512BYTES	0x0000A000
#define RE_RXFIFO_1024BYTES	0x0000C000
#define RE_RXFIFO_NOTHRESH	0x0000E000

/*
 * Bits in RX status header (included with RX'ed packet
 * in ring buffer).
 */
#define RE_RXSTAT_RXOK		0x00000001
#define RE_RXSTAT_ALIGNERR	0x00000002
#define RE_RXSTAT_CRCERR	0x00000004
#define RE_RXSTAT_GIANT		0x00000008
#define RE_RXSTAT_RUNT		0x00000010
#define RE_RXSTAT_BADSYM	0x00000020
#define RE_RXSTAT_BROAD		0x00002000
#define RE_RXSTAT_INDIV		0x00004000
#define RE_RXSTAT_MULTI		0x00008000
#define RE_RXSTAT_LENMASK	0xFFFF0000

#define RE_RXSTAT_UNFINISHED	0xFFF0		/* DMA still in progress */
/*
 * Command register.
 */
#define RE_CMD_EMPTY_RXBUF	0x0001
#define RE_CMD_TX_ENB		0x0004
#define RE_CMD_RX_ENB		0x0008
#define RE_CMD_RESET		0x0010
#define RE_CMD_STOPREQ		0x0080

/*
 * EEPROM control register
 */
#define RE_EE_DATAOUT		0x01	/* Data out */
#define RE_EE_DATAIN		0x02	/* Data in */
#define RE_EE_CLK		0x04	/* clock */
#define RE_EE_SEL		0x08	/* chip select */
#define RE_EE_MODE		(0x40|0x80)

#define RE_EEMODE_OFF		0x00
#define RE_EEMODE_AUTOLOAD	0x40
#define RE_EEMODE_PROGRAM	0x80
#define RE_EEMODE_WRITECFG	(0x80|0x40)

/* 9346 EEPROM commands */
#define RE_9346_READ		0x6
#define RE_EECMD_WRITE		0x140
#define RE_EECMD_READ_6BIT	0x180
#define RE_EECMD_READ_8BIT	0x600
#define RE_EECMD_ERASE		0x1c0

#define RE_EE_ID		0x00
#define RE_EE_PCI_VID		0x01
#define RE_EE_PCI_DID		0x02
/* Location of station address inside EEPROM */
#define RE_EE_EADDR		0x07

/*
 * Config 0 register
 */
#define RE_CFG0_ROM0		0x01
#define RE_CFG0_ROM1		0x02
#define RE_CFG0_ROM2		0x04
#define RE_CFG0_PL0		0x08
#define RE_CFG0_PL1		0x10
#define RE_CFG0_10MBPS		0x20	/* 10 Mbps internal mode */
#define RE_CFG0_PCS		0x40
#define RE_CFG0_SCR		0x80

/*
 * Config 1 register
 */
#define RE_CFG1_PWRDWN		0x01
#define RE_CFG1_SLEEP		0x02
#define RE_CFG1_IOMAP		0x04
#define RE_CFG1_MEMMAP		0x08
#define RE_CFG1_RSVD		0x10
#define RE_CFG1_DRVLOAD		0x20
#define RE_CFG1_LED0		0x40
#define RE_CFG1_FULLDUPLEX	0x40	/* 8129 only */
#define RE_CFG1_LED1		0x80

/*
 * 8139C+ register definitions
 */

/* RE_DUMPSTATS_LO register */

#define RE_DUMPSTATS_START	0x00000008

/* Transmit start register */

#define RE_TXSTART_SWI		0x01	/* generate TX interrupt */
#define RE_TXSTART_START	0x40	/* start normal queue transmit */
#define RE_TXSTART_HPRIO_START	0x80	/* start hi prio queue transmit */

/*
 * Config 2 register, 8139C+/8169/8169S/8110S only
 */
#define RE_CFG2_BUSFREQ		0x07
#define RE_CFG2_BUSWIDTH	0x08
#define RE_CFG2_AUXPWRSTS	0x10

#define RE_BUSFREQ_33MHZ	0x00
#define RE_BUSFREQ_66MHZ	0x01
                                        
#define RE_BUSWIDTH_32BITS	0x00
#define RE_BUSWIDTH_64BITS	0x08

/* C+ mode command register */

#define RE_CPLUSCMD_TXENB	0x0001	/* enable C+ transmit mode */
#define RE_CPLUSCMD_RXENB	0x0002	/* enable C+ receive mode */
#define RE_CPLUSCMD_PCI_MRW	0x0008	/* enable PCI multi-read/write */
#define RE_CPLUSCMD_PCI_DAC	0x0010	/* PCI dual-address cycle only */
#define RE_CPLUSCMD_RXCSUM_ENB	0x0020	/* enable RX checksum offload */
#define RE_CPLUSCMD_VLANSTRIP	0x0040	/* enable VLAN tag stripping */

/* C+ early transmit threshold */

#define RE_EARLYTXTHRESH_CNT	0x003F	/* byte count times 8 */ 

/*
 * Gigabit PHY access register (8169 only)
 */

#define RE_PHYAR_PHYDATA	0x0000FFFF
#define RE_PHYAR_PHYREG		0x001F0000
#define RE_PHYAR_BUSY		0x80000000

/*
 * Gigabit media status (8169 only)
 */
#define RE_GMEDIASTAT_FDX	0x01	/* full duplex */
#define RE_GMEDIASTAT_LINK	0x02	/* link up */
#define RE_GMEDIASTAT_10MBPS	0x04	/* 10mps link */
#define RE_GMEDIASTAT_100MBPS	0x08	/* 100mbps link */
#define RE_GMEDIASTAT_1000MBPS	0x10	/* gigE link */
#define RE_GMEDIASTAT_RXFLOW	0x20	/* RX flow control on */
#define RE_GMEDIASTAT_TXFLOW	0x40	/* TX flow control on */
#define RE_GMEDIASTAT_TBI	0x80	/* TBI enabled */

/*
 * The RealTek doesn't use a fragment-based descriptor mechanism.
 * Instead, there are only four register sets, each or which represents
 * one 'descriptor.' Basically, each TX descriptor is just a contiguous
 * packet buffer (32-bit aligned!) and we place the buffer addresses in
 * the registers so the chip knows where they are.
 *
 * We can sort of kludge together the same kind of buffer management
 * used in previous drivers, but we have to do buffer copies almost all
 * the time, so it doesn't really buy us much.
 *
 * For reception, there's just one large buffer where the chip stores
 * all received packets.
 */

#define RE_RX_BUF_SZ		RE_RXBUF_64
#define RE_RXBUFLEN		(1 << ((RE_RX_BUF_SZ >> 11) + 13))
#define RE_TX_LIST_CNT		4
#define RE_MIN_FRAMELEN		60
#define RE_TXTHRESH(x)		((x) << 11)
#define RE_TX_THRESH_INIT	96
#define RE_RX_FIFOTHRESH	RE_RXFIFO_NOTHRESH
#define RE_RX_MAXDMA		RE_RXDMA_UNLIMITED
#define RE_TX_MAXDMA		RE_TXDMA_2048BYTES

#define RE_RXCFG_CONFIG (RE_RX_FIFOTHRESH|RE_RX_MAXDMA|RE_RX_BUF_SZ)
#define RE_TXCFG_CONFIG	(RE_TXCFG_IFG|RE_TX_MAXDMA)

#define RE_IM_MAGIC		0x5050
#define RE_IM_RXTIME(t)		((t) & 0xf)
#define RE_IM_TXTIME(t)		(((t) & 0xf) << 8)

#if 0
struct re_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;
};
#endif

/*
 * MII constants
 */
#define RE_MII_STARTDELIM	0x01
#define RE_MII_READOP		0x02
#define RE_MII_WRITEOP		0x01
#define RE_MII_TURNAROUND	0x02

/*
 * The 8139C+ and 8160 gigE chips support descriptor-based TX
 * and RX. In fact, they even support TCP large send. Descriptors
 * must be allocated in contiguous blocks that are aligned on a
 * 256-byte boundary. The rings can hold a maximum of 64 descriptors.
 */

/*
 * RX/TX descriptor definition. When large send mode is enabled, the
 * lower 11 bits of the TX re_cmd word are used to hold the MSS, and
 * the checksum offload bits are disabled. The structure layout is
 * the same for RX and TX descriptors
 */

struct re_desc {
	uint32_t		re_cmdstat;
	uint32_t		re_control;
	uint32_t		re_bufaddr_lo;
	uint32_t		re_bufaddr_hi;
};

#define RE_TDESC_CMD_FRAGLEN	0x0000FFFF
#define RE_TDESC_CMD_TCPCSUM	0x00010000	/* TCP checksum enable */
#define RE_TDESC_CMD_UDPCSUM	0x00020000	/* UDP checksum enable */
#define RE_TDESC_CMD_IPCSUM	0x00040000	/* IP header checksum enable */
#define RE_TDESC_CMD_MSSVAL	0x07FF0000	/* Large send MSS value */
#define RE_TDESC_CMD_LGSEND	0x08000000	/* TCP large send enb */
#define RE_TDESC_CMD_EOF	0x10000000	/* end of frame marker */
#define RE_TDESC_CMD_SOF	0x20000000	/* start of frame marker */
#define RE_TDESC_CMD_EOR	0x40000000	/* end of ring marker */
#define RE_TDESC_CMD_OWN	0x80000000	/* chip owns descriptor */

#define RE_TDESC_CTL_INSTAG	0x00020000	/* Insert VLAN tag */
#define RE_TDESC_CTL_TAGDATA	0x0000FFFF	/* TAG data */
#define RE_TDESC_CTL_IPCSUM	0x20000000	/* IP header csum, MAC2 only */
#define RE_TDESC_CTL_TCPCSUM	0x60000000	/* TCP csum, MAC2 only */
#define RE_TDESC_CTL_UDPCSUM	0xa0000000	/* UDP csum, MAC2 only */

/*
 * Error bits are valid only on the last descriptor of a frame
 * (i.e. RE_TDESC_CMD_EOF == 1)
 */

#define RE_TDESC_STAT_COLCNT	0x000F0000	/* collision count */
#define RE_TDESC_STAT_EXCESSCOL	0x00100000	/* excessive collisions */
#define RE_TDESC_STAT_LINKFAIL	0x00200000	/* link faulure */
#define RE_TDESC_STAT_OWINCOL	0x00400000	/* out-of-window collision */
#define RE_TDESC_STAT_TXERRSUM	0x00800000	/* transmit error summary */
#define RE_TDESC_STAT_UNDERRUN	0x02000000	/* TX underrun occured */
#define RE_TDESC_STAT_OWN	0x80000000

/*
 * RX descriptor cmd/vlan definitions
 */

#define RE_RDESC_CMD_EOR	0x40000000
#define RE_RDESC_CMD_OWN	0x80000000
#define RE_RDESC_CMD_BUFLEN	0x00001FFF

#define RE_RDESC_STAT_OWN	0x80000000
#define RE_RDESC_STAT_EOR	0x40000000
#define RE_RDESC_STAT_SOF	0x20000000
#define RE_RDESC_STAT_EOF	0x10000000
#define RE_RDESC_STAT_FRALIGN	0x08000000	/* frame alignment error */
#define RE_RDESC_STAT_MCAST	0x04000000	/* multicast pkt received */
#define RE_RDESC_STAT_UCAST	0x02000000	/* unicast pkt received */
#define RE_RDESC_STAT_BCAST	0x01000000	/* broadcast pkt received */
#define RE_RDESC_STAT_BUFOFLOW	0x00800000	/* out of buffer space */
#define RE_RDESC_STAT_FIFOOFLOW	0x00400000	/* FIFO overrun */
#define RE_RDESC_STAT_GIANT	0x00200000	/* pkt > 4096 bytes */
#define RE_RDESC_STAT_RXERRSUM	0x00100000	/* RX error summary */
#define RE_RDESC_STAT_RUNT	0x00080000	/* runt packet received */
#define RE_RDESC_STAT_CRCERR	0x00040000	/* CRC error */
#define RE_RDESC_STAT_PROTOID	0x00030000	/* Protocol type */
#define RE_RDESC_STAT_IPSUMBAD	0x00008000	/* IP header checksum bad */
#define RE_RDESC_STAT_UDPSUMBAD	0x00004000	/* UDP checksum bad */
#define RE_RDESC_STAT_TCPSUMBAD	0x00002000	/* TCP checksum bad */
#define RE_RDESC_STAT_FRAGLEN	0x00001FFF	/* RX'ed frame/frag len */
#define RE_RDESC_STAT_GFRAGLEN	0x00003FFF	/* RX'ed frame/frag len */

#define RE_RDESC_CTL_HASTAG	0x00010000	/* VLAN tag available
						   (TAG data valid) */
#define RE_RDESC_CTL_TAGDATA	0x0000FFFF	/* TAG data */
#define RE_RDESC_CTL_PROTOIP4	0x40000000	/* IPv4 packet, MAC2 only */
#define RE_RDESC_CTL_PROTOIP6	0x80000000	/* IPv6 packet, MAC2 only */

#define RE_PROTOID_NONIP	0x00000000
#define RE_PROTOID_TCPIP	0x00010000
#define RE_PROTOID_UDPIP	0x00020000
#define RE_PROTOID_IP		0x00030000
#define RE_TCPPKT(x)		(((x) & RE_RDESC_STAT_PROTOID) == \
				 RE_PROTOID_TCPIP)
#define RE_UDPPKT(x)		(((x) & RE_RDESC_STAT_PROTOID) == \
				 RE_PROTOID_UDPIP)

/*
 * Statistics counter structure (8139C+ and 8169 only)
 */
struct re_stats {
	uint32_t		re_tx_pkts_lo;
	uint32_t		re_tx_pkts_hi;
	uint32_t		re_tx_errs_lo;
	uint32_t		re_tx_errs_hi;
	uint32_t		re_tx_errs;
	uint16_t		re_missed_pkts;
	uint16_t		re_rx_framealign_errs;
	uint32_t		re_tx_onecoll;
	uint32_t		re_tx_multicolls;
	uint32_t		re_rx_ucasts_hi;
	uint32_t		re_rx_ucasts_lo;
	uint32_t		re_rx_bcasts_lo;
	uint32_t		re_rx_bcasts_hi;
	uint32_t		re_rx_mcasts;
	uint16_t		re_tx_aborts;
	uint16_t		re_rx_underruns;
};

/*
 * General constants that are fun to know.
 *
 * PCI low memory base and low I/O base register, and
 * other PCI registers.
 */

#define RE_PCI_LOMEM		0x14
#define RE_PCI_LOIO		0x10

#define PCI_SUBDEVICE_LINKSYS_EG1032_REV3	0x0024