FreeBSD/Linux Kernel Cross Reference
sys/pci/if_rlreg.h

     /*-
      * 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: releng/5.4/sys/pci/if_rlreg.h 144067 2005-03-24 16:41:48Z des $
     */
    
    /*
     * RealTek 8129/8139 register offsets
     */
    #define RL_IDR0         0x0000          /* ID register 0 (station addr) */
    #define RL_IDR1         0x0001          /* Must use 32-bit accesses (?) */
    #define RL_IDR2         0x0002
    #define RL_IDR3         0x0003
    #define RL_IDR4         0x0004
    #define RL_IDR5         0x0005
                                            /* 0006-0007 reserved */
    #define RL_MAR0         0x0008          /* Multicast hash table */
    #define RL_MAR1         0x0009
    #define RL_MAR2         0x000A
    #define RL_MAR3         0x000B
    #define RL_MAR4         0x000C
    #define RL_MAR5         0x000D
    #define RL_MAR6         0x000E
    #define RL_MAR7         0x000F
    
    #define RL_TXSTAT0      0x0010          /* status of TX descriptor 0 */
    #define RL_TXSTAT1      0x0014          /* status of TX descriptor 1 */
    #define RL_TXSTAT2      0x0018          /* status of TX descriptor 2 */
    #define RL_TXSTAT3      0x001C          /* status of TX descriptor 3 */
    
    #define RL_TXADDR0      0x0020          /* address of TX descriptor 0 */
    #define RL_TXADDR1      0x0024          /* address of TX descriptor 1 */
    #define RL_TXADDR2      0x0028          /* address of TX descriptor 2 */
    #define RL_TXADDR3      0x002C          /* address of TX descriptor 3 */
    
    #define RL_RXADDR               0x0030  /* RX ring start address */
    #define RL_RX_EARLY_BYTES       0x0034  /* RX early byte count */
    #define RL_RX_EARLY_STAT        0x0036  /* RX early status */
    #define RL_COMMAND      0x0037          /* command register */
    #define RL_CURRXADDR    0x0038          /* current address of packet read */
    #define RL_CURRXBUF     0x003A          /* current RX buffer address */
    #define RL_IMR          0x003C          /* interrupt mask register */
    #define RL_ISR          0x003E          /* interrupt status register */
    #define RL_TXCFG        0x0040          /* transmit config */
    #define RL_RXCFG        0x0044          /* receive config */
    #define RL_TIMERCNT     0x0048          /* timer count register */
    #define RL_MISSEDPKT    0x004C          /* missed packet counter */
    #define RL_EECMD        0x0050          /* EEPROM command register */
    #define RL_CFG0         0x0051          /* config register #0 */
    #define RL_CFG1         0x0052          /* config register #1 */
                                            /* 0053-0057 reserved */   
    #define RL_MEDIASTAT    0x0058          /* media status register (8139) */
                                            /* 0059-005A reserved */
    #define RL_MII          0x005A          /* 8129 chip only */
    #define RL_HALTCLK      0x005B
    #define RL_MULTIINTR    0x005C          /* multiple interrupt */
    #define RL_PCIREV       0x005E          /* PCI revision value */
                                            /* 005F reserved */
    #define RL_TXSTAT_ALL   0x0060          /* TX status of all descriptors */
    
    /* Direct PHY access registers only available on 8139 */
    #define RL_BMCR         0x0062          /* PHY basic mode control */
    #define RL_BMSR         0x0064          /* PHY basic mode status */
    #define RL_ANAR         0x0066          /* PHY autoneg advert */
    #define RL_LPAR         0x0068          /* PHY link partner ability */
    #define RL_ANER         0x006A          /* PHY autoneg expansion */
    
    #define RL_DISCCNT      0x006C          /* disconnect counter */
    #define RL_FALSECAR     0x006E          /* false carrier counter */
    #define RL_NWAYTST      0x0070          /* NWAY test register */
    #define RL_RX_ER        0x0072          /* RX_ER counter */
   #define RL_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 RL_DUMPSTATS_LO         0x0010  /* counter dump command register */
   #define RL_DUMPSTATS_HI         0x0014  /* counter dump command register */
   #define RL_TXLIST_ADDR_LO       0x0020  /* 64 bits, 256 byte alignment */
   #define RL_TXLIST_ADDR_HI       0x0024  /* 64 bits, 256 byte alignment */
   #define RL_TXLIST_ADDR_HPRIO_LO 0x0028  /* 64 bits, 256 byte alignment */
   #define RL_TXLIST_ADDR_HPRIO_HI 0x002C  /* 64 bits, 256 byte alignment */
   #define RL_CFG2                 0x0053
   #define RL_TIMERINT             0x0054  /* interrupt on timer expire */
   #define RL_TXSTART              0x00D9  /* 8 bits */
   #define RL_CPLUS_CMD            0x00E0  /* 16 bits */
   #define RL_RXLIST_ADDR_LO       0x00E4  /* 64 bits, 256 byte alignment */
   #define RL_RXLIST_ADDR_HI       0x00E8  /* 64 bits, 256 byte alignment */
   #define RL_EARLY_TX_THRESH      0x00EC  /* 8 bits */
   
   /*
    * Registers specific to the 8169 gigE chip
    */
   #define RL_TIMERINT_8169        0x0058  /* different offset than 8139 */
   #define RL_PHYAR                0x0060
   #define RL_TBICSR               0x0064
   #define RL_TBI_ANAR             0x0068
   #define RL_TBI_LPAR             0x006A
   #define RL_GMEDIASTAT           0x006C  /* 8 bits */
   #define RL_MAXRXPKTLEN          0x00DA  /* 16 bits, chip multiplies by 8 */
   #define RL_GTXSTART             0x0038  /* 16 bits */
   
   /*
    * TX config register bits
    */
   #define RL_TXCFG_CLRABRT        0x00000001      /* retransmit aborted pkt */
   #define RL_TXCFG_MAXDMA         0x00000700      /* max DMA burst size */
   #define RL_TXCFG_CRCAPPEND      0x00010000      /* CRC append (0 = yes) */
   #define RL_TXCFG_LOOPBKTST      0x00060000      /* loopback test */
   #define RL_TXCFG_IFG2           0x00080000      /* 8169 only */
   #define RL_TXCFG_IFG            0x03000000      /* interframe gap */
   #define RL_TXCFG_HWREV          0x7CC00000
   
   #define RL_LOOPTEST_OFF         0x00000000
   #define RL_LOOPTEST_ON          0x00020000
   #define RL_LOOPTEST_ON_CPLUS    0x00060000
   
   #define RL_HWREV_8169           0x00000000
   #define RL_HWREV_8169S          0x04000000
   #define RL_HWREV_8169SB         0x10000000
   #define RL_HWREV_8110S          0x00800000
   #define RL_HWREV_8139           0x60000000
   #define RL_HWREV_8139A          0x70000000
   #define RL_HWREV_8139AG         0x70800000
   #define RL_HWREV_8139B          0x78000000
   #define RL_HWREV_8130           0x7C000000
   #define RL_HWREV_8139C          0x74000000
   #define RL_HWREV_8139D          0x74400000
   #define RL_HWREV_8139CPLUS      0x74800000
   #define RL_HWREV_8101           0x74c00000
   #define RL_HWREV_8100           0x78800000
   
   #define RL_TXDMA_16BYTES        0x00000000
   #define RL_TXDMA_32BYTES        0x00000100
   #define RL_TXDMA_64BYTES        0x00000200
   #define RL_TXDMA_128BYTES       0x00000300
   #define RL_TXDMA_256BYTES       0x00000400
   #define RL_TXDMA_512BYTES       0x00000500
   #define RL_TXDMA_1024BYTES      0x00000600
   #define RL_TXDMA_2048BYTES      0x00000700
   
   /*
    * Transmit descriptor status register bits.
    */
   #define RL_TXSTAT_LENMASK       0x00001FFF
   #define RL_TXSTAT_OWN           0x00002000
   #define RL_TXSTAT_TX_UNDERRUN   0x00004000
   #define RL_TXSTAT_TX_OK         0x00008000
   #define RL_TXSTAT_EARLY_THRESH  0x003F0000
   #define RL_TXSTAT_COLLCNT       0x0F000000
   #define RL_TXSTAT_CARR_HBEAT    0x10000000
   #define RL_TXSTAT_OUTOFWIN      0x20000000
   #define RL_TXSTAT_TXABRT        0x40000000
   #define RL_TXSTAT_CARRLOSS      0x80000000
   
   /*
    * Interrupt status register bits.
    */
   #define RL_ISR_RX_OK            0x0001
   #define RL_ISR_RX_ERR           0x0002
   #define RL_ISR_TX_OK            0x0004
   #define RL_ISR_TX_ERR           0x0008
   #define RL_ISR_RX_OVERRUN       0x0010
   #define RL_ISR_PKT_UNDERRUN     0x0020
   #define RL_ISR_LINKCHG          0x0020  /* 8169 only */
   #define RL_ISR_FIFO_OFLOW       0x0040  /* 8139 only */
   #define RL_ISR_TX_DESC_UNAVAIL  0x0080  /* C+ only */
   #define RL_ISR_SWI              0x0100  /* C+ only */
   #define RL_ISR_CABLE_LEN_CHGD   0x2000
   #define RL_ISR_PCS_TIMEOUT      0x4000  /* 8129 only */
   #define RL_ISR_TIMEOUT_EXPIRED  0x4000
   #define RL_ISR_SYSTEM_ERR       0x8000
   
   #define RL_INTRS        \
           (RL_ISR_TX_OK|RL_ISR_RX_OK|RL_ISR_RX_ERR|RL_ISR_TX_ERR|         \
           RL_ISR_RX_OVERRUN|RL_ISR_PKT_UNDERRUN|RL_ISR_FIFO_OFLOW|        \
           RL_ISR_PCS_TIMEOUT|RL_ISR_SYSTEM_ERR)
   
   #define RL_INTRS_CPLUS  \
           (RL_ISR_RX_OK|RL_ISR_RX_ERR|RL_ISR_TX_ERR|                      \
           RL_ISR_RX_OVERRUN|RL_ISR_PKT_UNDERRUN|RL_ISR_FIFO_OFLOW|        \
           RL_ISR_PCS_TIMEOUT|RL_ISR_SYSTEM_ERR|RL_ISR_TIMEOUT_EXPIRED)
   
   /*
    * Media status register. (8139 only)
    */
   #define RL_MEDIASTAT_RXPAUSE    0x01
   #define RL_MEDIASTAT_TXPAUSE    0x02
   #define RL_MEDIASTAT_LINK       0x04
   #define RL_MEDIASTAT_SPEED10    0x08
   #define RL_MEDIASTAT_RXFLOWCTL  0x40    /* duplex mode */
   #define RL_MEDIASTAT_TXFLOWCTL  0x80    /* duplex mode */
   
   /*
    * Receive config register.
    */
   #define RL_RXCFG_RX_ALLPHYS     0x00000001      /* accept all nodes */
   #define RL_RXCFG_RX_INDIV       0x00000002      /* match filter */
   #define RL_RXCFG_RX_MULTI       0x00000004      /* accept all multicast */
   #define RL_RXCFG_RX_BROAD       0x00000008      /* accept all broadcast */
   #define RL_RXCFG_RX_RUNT        0x00000010
   #define RL_RXCFG_RX_ERRPKT      0x00000020
   #define RL_RXCFG_WRAP           0x00000080
   #define RL_RXCFG_MAXDMA         0x00000700
   #define RL_RXCFG_BUFSZ          0x00001800
   #define RL_RXCFG_FIFOTHRESH     0x0000E000
   #define RL_RXCFG_EARLYTHRESH    0x07000000
   
   #define RL_RXDMA_16BYTES        0x00000000
   #define RL_RXDMA_32BYTES        0x00000100
   #define RL_RXDMA_64BYTES        0x00000200
   #define RL_RXDMA_128BYTES       0x00000300
   #define RL_RXDMA_256BYTES       0x00000400
   #define RL_RXDMA_512BYTES       0x00000500
   #define RL_RXDMA_1024BYTES      0x00000600
   #define RL_RXDMA_UNLIMITED      0x00000700
   
   #define RL_RXBUF_8              0x00000000
   #define RL_RXBUF_16             0x00000800
   #define RL_RXBUF_32             0x00001000
   #define RL_RXBUF_64             0x00001800
   
   #define RL_RXFIFO_16BYTES       0x00000000
   #define RL_RXFIFO_32BYTES       0x00002000
   #define RL_RXFIFO_64BYTES       0x00004000
   #define RL_RXFIFO_128BYTES      0x00006000
   #define RL_RXFIFO_256BYTES      0x00008000
   #define RL_RXFIFO_512BYTES      0x0000A000
   #define RL_RXFIFO_1024BYTES     0x0000C000
   #define RL_RXFIFO_NOTHRESH      0x0000E000
   
   /*
    * Bits in RX status header (included with RX'ed packet
    * in ring buffer).
    */
   #define RL_RXSTAT_RXOK          0x00000001
   #define RL_RXSTAT_ALIGNERR      0x00000002
   #define RL_RXSTAT_CRCERR        0x00000004
   #define RL_RXSTAT_GIANT         0x00000008
   #define RL_RXSTAT_RUNT          0x00000010
   #define RL_RXSTAT_BADSYM        0x00000020
   #define RL_RXSTAT_BROAD         0x00002000
   #define RL_RXSTAT_INDIV         0x00004000
   #define RL_RXSTAT_MULTI         0x00008000
   #define RL_RXSTAT_LENMASK       0xFFFF0000
   
   #define RL_RXSTAT_UNFINISHED    0xFFF0          /* DMA still in progress */
   /*
    * Command register.
    */
   #define RL_CMD_EMPTY_RXBUF      0x0001
   #define RL_CMD_TX_ENB           0x0004
   #define RL_CMD_RX_ENB           0x0008
   #define RL_CMD_RESET            0x0010
   
   /*
    * EEPROM control register
    */
   #define RL_EE_DATAOUT           0x01    /* Data out */
   #define RL_EE_DATAIN            0x02    /* Data in */
   #define RL_EE_CLK               0x04    /* clock */
   #define RL_EE_SEL               0x08    /* chip select */
   #define RL_EE_MODE              (0x40|0x80)
   
   #define RL_EEMODE_OFF           0x00
   #define RL_EEMODE_AUTOLOAD      0x40
   #define RL_EEMODE_PROGRAM       0x80
   #define RL_EEMODE_WRITECFG      (0x80|0x40)
   
   /* 9346 EEPROM commands */
   #define RL_EECMD_WRITE          0x140
   #define RL_EECMD_READ_6BIT      0x180
   #define RL_EECMD_READ_8BIT      0x600
   #define RL_EECMD_ERASE          0x1c0
   
   #define RL_EE_ID                0x00
   #define RL_EE_PCI_VID           0x01
   #define RL_EE_PCI_DID           0x02
   /* Location of station address inside EEPROM */
   #define RL_EE_EADDR             0x07
   
   /*
    * MII register (8129 only)
    */
   #define RL_MII_CLK              0x01
   #define RL_MII_DATAIN           0x02
   #define RL_MII_DATAOUT          0x04
   #define RL_MII_DIR              0x80    /* 0 == input, 1 == output */
   
   /*
    * Config 0 register
    */
   #define RL_CFG0_ROM0            0x01
   #define RL_CFG0_ROM1            0x02
   #define RL_CFG0_ROM2            0x04
   #define RL_CFG0_PL0             0x08
   #define RL_CFG0_PL1             0x10
   #define RL_CFG0_10MBPS          0x20    /* 10 Mbps internal mode */
   #define RL_CFG0_PCS             0x40
   #define RL_CFG0_SCR             0x80
   
   /*
    * Config 1 register
    */
   #define RL_CFG1_PWRDWN          0x01
   #define RL_CFG1_SLEEP           0x02
   #define RL_CFG1_IOMAP           0x04
   #define RL_CFG1_MEMMAP          0x08
   #define RL_CFG1_RSVD            0x10
   #define RL_CFG1_DRVLOAD         0x20
   #define RL_CFG1_LED0            0x40
   #define RL_CFG1_FULLDUPLEX      0x40    /* 8129 only */
   #define RL_CFG1_LED1            0x80
   
   /*
    * 8139C+ register definitions
    */
   
   /* RL_DUMPSTATS_LO register */
   
   #define RL_DUMPSTATS_START      0x00000008
   
   /* Transmit start register */
   
   #define RL_TXSTART_SWI          0x01    /* generate TX interrupt */
   #define RL_TXSTART_START        0x40    /* start normal queue transmit */
   #define RL_TXSTART_HPRIO_START  0x80    /* start hi prio queue transmit */
   
   /*
    * Config 2 register, 8139C+/8169/8169S/8110S only
    */
   #define RL_CFG2_BUSFREQ         0x07
   #define RL_CFG2_BUSWIDTH        0x08
   #define RL_CFG2_AUXPWRSTS       0x10
   
   #define RL_BUSFREQ_33MHZ        0x00
   #define RL_BUSFREQ_66MHZ        0x01
                                           
   #define RL_BUSWIDTH_32BITS      0x00
   #define RL_BUSWIDTH_64BITS      0x08
   
   /* C+ mode command register */
   
   #define RL_CPLUSCMD_TXENB       0x0001  /* enable C+ transmit mode */
   #define RL_CPLUSCMD_RXENB       0x0002  /* enable C+ receive mode */
   #define RL_CPLUSCMD_PCI_MRW     0x0008  /* enable PCI multi-read/write */
   #define RL_CPLUSCMD_PCI_DAC     0x0010  /* PCI dual-address cycle only */
   #define RL_CPLUSCMD_RXCSUM_ENB  0x0020  /* enable RX checksum offload */
   #define RL_CPLUSCMD_VLANSTRIP   0x0040  /* enable VLAN tag stripping */
   
   /* C+ early transmit threshold */
   
   #define RL_EARLYTXTHRESH_CNT    0x003F  /* byte count times 8 */ 
   
   /*
    * Gigabit PHY access register (8169 only)
    */
   
   #define RL_PHYAR_PHYDATA        0x0000FFFF
   #define RL_PHYAR_PHYREG         0x001F0000
   #define RL_PHYAR_BUSY           0x80000000
   
   /*
    * Gigabit media status (8169 only)
    */
   #define RL_GMEDIASTAT_FDX       0x01    /* full duplex */
   #define RL_GMEDIASTAT_LINK      0x02    /* link up */
   #define RL_GMEDIASTAT_10MBPS    0x04    /* 10mps link */
   #define RL_GMEDIASTAT_100MBPS   0x08    /* 100mbps link */
   #define RL_GMEDIASTAT_1000MBPS  0x10    /* gigE link */
   #define RL_GMEDIASTAT_RXFLOW    0x20    /* RX flow control on */
   #define RL_GMEDIASTAT_TXFLOW    0x40    /* TX flow control on */
   #define RL_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 RL_RX_BUF_SZ            RL_RXBUF_64
   #define RL_RXBUFLEN             (1 << ((RL_RX_BUF_SZ >> 11) + 13))
   #define RL_TX_LIST_CNT          4
   #define RL_MIN_FRAMELEN         60
   #define RL_TXTHRESH(x)          ((x) << 11)
   #define RL_TX_THRESH_INIT       96
   #define RL_RX_FIFOTHRESH        RL_RXFIFO_NOTHRESH
   #define RL_RX_MAXDMA            RL_RXDMA_UNLIMITED
   #define RL_TX_MAXDMA            RL_TXDMA_2048BYTES
   
   #define RL_RXCFG_CONFIG (RL_RX_FIFOTHRESH|RL_RX_MAXDMA|RL_RX_BUF_SZ)
   #define RL_TXCFG_CONFIG (RL_TXCFG_IFG|RL_TX_MAXDMA)
   
   #define RL_ETHER_ALIGN  2
   
   struct rl_chain_data {
           uint16_t                cur_rx;
           uint8_t                 *rl_rx_buf;
           uint8_t                 *rl_rx_buf_ptr;
           bus_dmamap_t            rl_rx_dmamap;
   
           struct mbuf             *rl_tx_chain[RL_TX_LIST_CNT];
           bus_dmamap_t            rl_tx_dmamap[RL_TX_LIST_CNT];
           uint8_t                 last_tx;
           uint8_t                 cur_tx;
   };
   
   #define RL_INC(x)               (x = (x + 1) % RL_TX_LIST_CNT)
   #define RL_CUR_TXADDR(x)        ((x->rl_cdata.cur_tx * 4) + RL_TXADDR0)
   #define RL_CUR_TXSTAT(x)        ((x->rl_cdata.cur_tx * 4) + RL_TXSTAT0)
   #define RL_CUR_TXMBUF(x)        (x->rl_cdata.rl_tx_chain[x->rl_cdata.cur_tx])
   #define RL_CUR_DMAMAP(x)        (x->rl_cdata.rl_tx_dmamap[x->rl_cdata.cur_tx])
   #define RL_LAST_TXADDR(x)       ((x->rl_cdata.last_tx * 4) + RL_TXADDR0)
   #define RL_LAST_TXSTAT(x)       ((x->rl_cdata.last_tx * 4) + RL_TXSTAT0)
   #define RL_LAST_TXMBUF(x)       (x->rl_cdata.rl_tx_chain[x->rl_cdata.last_tx])
   #define RL_LAST_DMAMAP(x)       (x->rl_cdata.rl_tx_dmamap[x->rl_cdata.last_tx])
   
   struct rl_type {
           uint16_t                rl_vid;
           uint16_t                rl_did;
           int                     rl_basetype;
           char                    *rl_name;
   };
   
   struct rl_hwrev {
           uint32_t                rl_rev;
           int                     rl_type;
           char                    *rl_desc;
   };
   
   struct rl_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 RL_MII_STARTDELIM       0x01
   #define RL_MII_READOP           0x02
   #define RL_MII_WRITEOP          0x01
   #define RL_MII_TURNAROUND       0x02
   
   #define RL_8129                 1
   #define RL_8139                 2
   #define RL_8139CPLUS            3
   #define RL_8169                 4
   
   #define RL_ISCPLUS(x)           ((x)->rl_type == RL_8139CPLUS ||        \
                                    (x)->rl_type == RL_8169)
   
   /*
    * 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 rl_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 rl_desc {
           uint32_t                rl_cmdstat;
           uint32_t                rl_vlanctl;
           uint32_t                rl_bufaddr_lo;
           uint32_t                rl_bufaddr_hi;
   };
   
   #define RL_TDESC_CMD_FRAGLEN    0x0000FFFF
   #define RL_TDESC_CMD_TCPCSUM    0x00010000      /* TCP checksum enable */
   #define RL_TDESC_CMD_UDPCSUM    0x00020000      /* UDP checksum enable */
   #define RL_TDESC_CMD_IPCSUM     0x00040000      /* IP header checksum enable */
   #define RL_TDESC_CMD_MSSVAL     0x07FF0000      /* Large send MSS value */
   #define RL_TDESC_CMD_LGSEND     0x08000000      /* TCP large send enb */
   #define RL_TDESC_CMD_EOF        0x10000000      /* end of frame marker */
   #define RL_TDESC_CMD_SOF        0x20000000      /* start of frame marker */
   #define RL_TDESC_CMD_EOR        0x40000000      /* end of ring marker */
   #define RL_TDESC_CMD_OWN        0x80000000      /* chip owns descriptor */
   
   #define RL_TDESC_VLANCTL_TAG    0x00020000      /* Insert VLAN tag */
   #define RL_TDESC_VLANCTL_DATA   0x0000FFFF      /* TAG data */
   
   /*
    * Error bits are valid only on the last descriptor of a frame
    * (i.e. RL_TDESC_CMD_EOF == 1)
    */
   
   #define RL_TDESC_STAT_COLCNT    0x000F0000      /* collision count */
   #define RL_TDESC_STAT_EXCESSCOL 0x00100000      /* excessive collisions */
   #define RL_TDESC_STAT_LINKFAIL  0x00200000      /* link faulure */
   #define RL_TDESC_STAT_OWINCOL   0x00400000      /* out-of-window collision */
   #define RL_TDESC_STAT_TXERRSUM  0x00800000      /* transmit error summary */
   #define RL_TDESC_STAT_UNDERRUN  0x02000000      /* TX underrun occured */
   #define RL_TDESC_STAT_OWN       0x80000000
   
   /*
    * RX descriptor cmd/vlan definitions
    */
   
   #define RL_RDESC_CMD_EOR        0x40000000
   #define RL_RDESC_CMD_OWN        0x80000000
   #define RL_RDESC_CMD_BUFLEN     0x00001FFF
   
   #define RL_RDESC_STAT_OWN       0x80000000
   #define RL_RDESC_STAT_EOR       0x40000000
   #define RL_RDESC_STAT_SOF       0x20000000
   #define RL_RDESC_STAT_EOF       0x10000000
   #define RL_RDESC_STAT_FRALIGN   0x08000000      /* frame alignment error */
   #define RL_RDESC_STAT_MCAST     0x04000000      /* multicast pkt received */
   #define RL_RDESC_STAT_UCAST     0x02000000      /* unicast pkt received */
   #define RL_RDESC_STAT_BCAST     0x01000000      /* broadcast pkt received */
   #define RL_RDESC_STAT_BUFOFLOW  0x00800000      /* out of buffer space */
   #define RL_RDESC_STAT_FIFOOFLOW 0x00400000      /* FIFO overrun */
   #define RL_RDESC_STAT_GIANT     0x00200000      /* pkt > 4096 bytes */
   #define RL_RDESC_STAT_RXERRSUM  0x00100000      /* RX error summary */
   #define RL_RDESC_STAT_RUNT      0x00080000      /* runt packet received */
   #define RL_RDESC_STAT_CRCERR    0x00040000      /* CRC error */
   #define RL_RDESC_STAT_PROTOID   0x00030000      /* Protocol type */
   #define RL_RDESC_STAT_IPSUMBAD  0x00008000      /* IP header checksum bad */
   #define RL_RDESC_STAT_UDPSUMBAD 0x00004000      /* UDP checksum bad */
   #define RL_RDESC_STAT_TCPSUMBAD 0x00002000      /* TCP checksum bad */
   #define RL_RDESC_STAT_FRAGLEN   0x00001FFF      /* RX'ed frame/frag len */
   #define RL_RDESC_STAT_GFRAGLEN  0x00003FFF      /* RX'ed frame/frag len */
   #define RL_RDESC_STAT_ERRS      (RL_RDESC_STAT_GIANT|RL_RDESC_STAT_RUNT| \
                                    RL_RDESC_STAT_CRCERR)
   
   #define RL_RDESC_VLANCTL_TAG    0x00010000      /* VLAN tag available
                                                      (rl_vlandata valid)*/
   #define RL_RDESC_VLANCTL_DATA   0x0000FFFF      /* TAG data */
   
   #define RL_PROTOID_NONIP        0x00000000
   #define RL_PROTOID_TCPIP        0x00010000
   #define RL_PROTOID_UDPIP        0x00020000
   #define RL_PROTOID_IP           0x00030000
   #define RL_TCPPKT(x)            (((x) & RL_RDESC_STAT_PROTOID) == \
                                    RL_PROTOID_TCPIP)
   #define RL_UDPPKT(x)            (((x) & RL_RDESC_STAT_PROTOID) == \
                                    RL_PROTOID_UDPIP)
   
   /*
    * Statistics counter structure (8139C+ and 8169 only)
    */
   struct rl_stats {
           uint32_t                rl_tx_pkts_lo;
           uint32_t                rl_tx_pkts_hi;
           uint32_t                rl_tx_errs_lo;
           uint32_t                rl_tx_errs_hi;
           uint32_t                rl_tx_errs;
           uint16_t                rl_missed_pkts;
           uint16_t                rl_rx_framealign_errs;
           uint32_t                rl_tx_onecoll;
           uint32_t                rl_tx_multicolls;
           uint32_t                rl_rx_ucasts_hi;
           uint32_t                rl_rx_ucasts_lo;
           uint32_t                rl_rx_bcasts_lo;
           uint32_t                rl_rx_bcasts_hi;
           uint32_t                rl_rx_mcasts;
           uint16_t                rl_tx_aborts;
           uint16_t                rl_rx_underruns;
   };
   
   /*
    * Rx/Tx descriptor parameters (8139C+ and 8169 only)
    *
    * Tx/Rx count must be equal.  Shared code like re_dma_map_desc assumes this.
    * Buffers must be a multiple of 8 bytes.  Currently limit to 64 descriptors
    * due to the 8139C+.  We need to put the number of descriptors in the ring
    * structure and use that value instead.
    */
   #if !defined(__i386__) && !defined(__amd64__)
   #define RE_FIXUP_RX     1
   #endif
   
   #define RL_TX_DESC_CNT          64
   #define RL_RX_DESC_CNT          RL_TX_DESC_CNT
   #define RL_RX_LIST_SZ           (RL_RX_DESC_CNT * sizeof(struct rl_desc))
   #define RL_TX_LIST_SZ           (RL_TX_DESC_CNT * sizeof(struct rl_desc))
   #define RL_RING_ALIGN           256
   #define RL_IFQ_MAXLEN           512
   #define RL_DESC_INC(x)          (x = (x + 1) % RL_TX_DESC_CNT)
   #define RL_OWN(x)               (le32toh((x)->rl_cmdstat) & RL_RDESC_STAT_OWN)
   #define RL_RXBYTES(x)           (le32toh((x)->rl_cmdstat) & sc->rl_rxlenmask)
   #define RL_PKTSZ(x)             ((x)/* >> 3*/)
   #ifdef RE_FIXUP_RX
   #define RE_ETHER_ALIGN  sizeof(uint64_t)
   #define RE_RX_DESC_BUFLEN       (MCLBYTES - RE_ETHER_ALIGN)
   #else
   #define RE_ETHER_ALIGN  0
   #define RE_RX_DESC_BUFLEN       MCLBYTES
   #endif
   
   #define RL_ADDR_LO(y)           ((uint64_t) (y) & 0xFFFFFFFF)
   #define RL_ADDR_HI(y)           ((uint64_t) (y) >> 32)
   
   /* see comment in dev/re/if_re.c */
   #define RL_JUMBO_FRAMELEN       7440
   #define RL_JUMBO_MTU            (RL_JUMBO_FRAMELEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
   
   struct rl_softc;
   
   struct rl_dmaload_arg {
           struct rl_softc         *sc;
           int                     rl_idx;
           int                     rl_maxsegs;
           uint32_t                rl_flags;
           struct rl_desc          *rl_ring;
   };
   
   struct rl_list_data {
           struct mbuf             *rl_tx_mbuf[RL_TX_DESC_CNT];
           struct mbuf             *rl_rx_mbuf[RL_TX_DESC_CNT];
           int                     rl_tx_prodidx;
           int                     rl_rx_prodidx;
           int                     rl_tx_considx;
           int                     rl_tx_free;
           bus_dmamap_t            rl_tx_dmamap[RL_TX_DESC_CNT];
           bus_dmamap_t            rl_rx_dmamap[RL_RX_DESC_CNT];
           bus_dma_tag_t           rl_mtag;        /* mbuf mapping tag */
           bus_dma_tag_t           rl_stag;        /* stats mapping tag */
           bus_dmamap_t            rl_smap;        /* stats map */
           struct rl_stats         *rl_stats;
           bus_addr_t              rl_stats_addr;
           bus_dma_tag_t           rl_rx_list_tag;
           bus_dmamap_t            rl_rx_list_map;
           struct rl_desc          *rl_rx_list;
           bus_addr_t              rl_rx_list_addr;
           bus_dma_tag_t           rl_tx_list_tag;
           bus_dmamap_t            rl_tx_list_map;
           struct rl_desc          *rl_tx_list;
           bus_addr_t              rl_tx_list_addr;
   };
   
   struct rl_softc {
           struct arpcom           arpcom;         /* interface info */
           bus_space_handle_t      rl_bhandle;     /* bus space handle */
           bus_space_tag_t         rl_btag;        /* bus space tag */
           struct resource         *rl_res;
           struct resource         *rl_irq;
           void                    *rl_intrhand;
           device_t                rl_miibus;
           bus_dma_tag_t           rl_parent_tag;
           bus_dma_tag_t           rl_tag;
           uint8_t                 rl_unit;        /* interface number */
           uint8_t                 rl_type;
           int                     rl_eecmd_read;
           uint8_t                 rl_stats_no_timeout;
           int                     rl_txthresh;
           struct rl_chain_data    rl_cdata;
           struct rl_list_data     rl_ldata;
           struct callout_handle   rl_stat_ch;
           struct mtx              rl_mtx;
           struct mbuf             *rl_head;
           struct mbuf             *rl_tail;
           uint32_t                rl_hwrev;
           uint32_t                rl_rxlenmask;
           int                     rl_testmode;
           int                     suspended;      /* 0 = normal  1 = suspended */
   #ifdef DEVICE_POLLING
           int                     rxcycles;
   #endif
   };
   
   #define RL_LOCK(_sc)            mtx_lock(&(_sc)->rl_mtx)
   #define RL_UNLOCK(_sc)          mtx_unlock(&(_sc)->rl_mtx)
   #define RL_LOCK_ASSERT(_sc)     mtx_assert(&(_sc)->rl_mtx, MA_OWNED)
   
   /*
    * register space access macros
    */
   #define CSR_WRITE_STREAM_4(sc, reg, val)        \
           bus_space_write_stream_4(sc->rl_btag, sc->rl_bhandle, reg, val)
   #define CSR_WRITE_4(sc, reg, val)       \
           bus_space_write_4(sc->rl_btag, sc->rl_bhandle, reg, val)
   #define CSR_WRITE_2(sc, reg, val)       \
           bus_space_write_2(sc->rl_btag, sc->rl_bhandle, reg, val)
   #define CSR_WRITE_1(sc, reg, val)       \
           bus_space_write_1(sc->rl_btag, sc->rl_bhandle, reg, val)
   
   #define CSR_READ_4(sc, reg)             \
           bus_space_read_4(sc->rl_btag, sc->rl_bhandle, reg)
   #define CSR_READ_2(sc, reg)             \
           bus_space_read_2(sc->rl_btag, sc->rl_bhandle, reg)
   #define CSR_READ_1(sc, reg)             \
           bus_space_read_1(sc->rl_btag, sc->rl_bhandle, reg)
   
   #define RL_TIMEOUT              1000
   
   /*
    * General constants that are fun to know.
    *
    * RealTek PCI vendor ID
    */
   #define RT_VENDORID                             0x10EC
   
   /*
    * RealTek chip device IDs.
    */
   #define RT_DEVICEID_8129                        0x8129
   #define RT_DEVICEID_8138                        0x8138
   #define RT_DEVICEID_8139                        0x8139
   #define RT_DEVICEID_8169                        0x8169
   #define RT_DEVICEID_8100                        0x8100
   
   #define RT_REVID_8139CPLUS                      0x20
   
   /*
    * Accton PCI vendor ID
    */
   #define ACCTON_VENDORID                         0x1113
   
   /*
    * Accton MPX 5030/5038 device ID.
    */
   #define ACCTON_DEVICEID_5030                    0x1211
   
   /*
    * Nortel PCI vendor ID
    */
   #define NORTEL_VENDORID                         0x126C
   
   /*
    * Delta Electronics Vendor ID.
    */
   #define DELTA_VENDORID                          0x1500
   
   /*
    * Delta device IDs.
    */
   #define DELTA_DEVICEID_8139                     0x1360
   
   /*
    * Addtron vendor ID.
    */
   #define ADDTRON_VENDORID                        0x4033
   
   /*
    * Addtron device IDs.
    */
   #define ADDTRON_DEVICEID_8139                   0x1360
   
   /*
    * D-Link vendor ID.
    */
   #define DLINK_VENDORID                          0x1186
   
   /*
    * D-Link DFE-530TX+ device ID
    */
   #define DLINK_DEVICEID_530TXPLUS                0x1300
   
   /*
    * D-Link DFE-690TXD device ID
    */
   #define DLINK_DEVICEID_690TXD                   0x1340
   
   /*
    * Corega K.K vendor ID
    */
   #define COREGA_VENDORID                         0x1259
   
   /*
    * Corega FEther CB-TXD device ID
    */
   #define COREGA_DEVICEID_FETHERCBTXD                     0xa117
   
   /*
    * Corega FEtherII CB-TXD device ID
    */
   #define COREGA_DEVICEID_FETHERIICBTXD                   0xa11e
   
   /*
    * Corega CG-LAPCIGT device ID
    */
   #define COREGA_DEVICEID_CGLAPCIGT               0xc107
   
   /*
    * Peppercon vendor ID
    */
   #define PEPPERCON_VENDORID                      0x1743
   
   /*
    * Peppercon ROL-F device ID
    */
   #define PEPPERCON_DEVICEID_ROLF                 0x8139
   
   /*
    * Planex Communications, Inc. vendor ID
    */
   #define PLANEX_VENDORID                         0x14ea
   
   /*
    * Planex FNW-3800-TX device ID
    */
   #define PLANEX_DEVICEID_FNW3800TX               0xab07
   
   /*
    * LevelOne vendor ID
    */
   #define LEVEL1_VENDORID                         0x018A
   
   /*
    * LevelOne FPC-0106TX devide ID
    */
   #define LEVEL1_DEVICEID_FPC0106TX               0x0106
   
   /*
    * Compaq vendor ID
    */
   #define CP_VENDORID                             0x021B
   
   /*
    * Edimax vendor ID
    */
   #define EDIMAX_VENDORID                         0x13D1
   
   /*
    * Edimax EP-4103DL cardbus device ID
    */
   #define EDIMAX_DEVICEID_EP4103DL                0xAB06
   
   /*
    * PCI low memory base and low I/O base register, and
    * other PCI registers.
    */
   
   #define RL_PCI_VENDOR_ID        0x00
   #define RL_PCI_DEVICE_ID        0x02
   #define RL_PCI_COMMAND          0x04
   #define RL_PCI_STATUS           0x06
   #define RL_PCI_CLASSCODE        0x09
   #define RL_PCI_LATENCY_TIMER    0x0D
   #define RL_PCI_HEADER_TYPE      0x0E
   #define RL_PCI_LOIO             0x10
   #define RL_PCI_LOMEM            0x14
   #define RL_PCI_BIOSROM          0x30
   #define RL_PCI_INTLINE          0x3C
   #define RL_PCI_INTPIN           0x3D
   #define RL_PCI_MINGNT           0x3E
   #define RL_PCI_MINLAT           0x0F
   #define RL_PCI_RESETOPT         0x48
   #define RL_PCI_EEPROM_DATA      0x4C
   
   #define RL_PCI_CAPID            0x50 /* 8 bits */
   #define RL_PCI_NEXTPTR          0x51 /* 8 bits */
   #define RL_PCI_PWRMGMTCAP       0x52 /* 16 bits */
   #define RL_PCI_PWRMGMTCTRL      0x54 /* 16 bits */
   
   #define RL_PSTATE_MASK          0x0003
   #define RL_PSTATE_D0            0x0000
   #define RL_PSTATE_D1            0x0002
   #define RL_PSTATE_D2            0x0002
   #define RL_PSTATE_D3            0x0003
   #define RL_PME_EN               0x0010
   #define RL_PME_STATUS           0x8000

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