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/* sunbmac.h: Defines for the Sun "Big MAC" 100baseT ethernet cards.
*
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SUNBMAC_H
#define _SUNBMAC_H
/* QEC global registers. */
struct qe_globreg {
volatile unsigned int ctrl; /* Control */
volatile unsigned int stat; /* Status */
volatile unsigned int psize; /* Packet Size */
volatile unsigned int msize; /* Local-mem size (64K) */
volatile unsigned int rsize; /* Receive partition size */
volatile unsigned int tsize; /* Transmit partition size */
};
#define GLOB_CTRL_MMODE 0x40000000 /* MACE qec mode */
#define GLOB_CTRL_BMODE 0x10000000 /* BigMAC qec mode */
#define GLOB_CTRL_EPAR 0x00000020 /* Enable parity */
#define GLOB_CTRL_ACNTRL 0x00000018 /* SBUS arbitration control */
#define GLOB_CTRL_B64 0x00000004 /* 64 byte dvma bursts */
#define GLOB_CTRL_B32 0x00000002 /* 32 byte dvma bursts */
#define GLOB_CTRL_B16 0x00000000 /* 16 byte dvma bursts */
#define GLOB_CTRL_RESET 0x00000001 /* Reset the QEC */
#define GLOB_STAT_TX 0x00000008 /* BigMAC Transmit IRQ */
#define GLOB_STAT_RX 0x00000004 /* BigMAC Receive IRQ */
#define GLOB_STAT_BM 0x00000002 /* BigMAC Global IRQ */
#define GLOB_STAT_ER 0x00000001 /* BigMAC Error IRQ */
#define GLOB_PSIZE_2048 0x00 /* 2k packet size */
#define GLOB_PSIZE_4096 0x01 /* 4k packet size */
#define GLOB_PSIZE_6144 0x10 /* 6k packet size */
#define GLOB_PSIZE_8192 0x11 /* 8k packet size */
/* QEC BigMAC channel registers. */
struct qe_creg {
volatile unsigned int ctrl; /* Control */
volatile unsigned int stat; /* Status */
volatile unsigned int rxds; /* RX descriptor ring ptr */
volatile unsigned int txds; /* TX descriptor ring ptr */
volatile unsigned int rimask; /* RX Interrupt Mask */
volatile unsigned int timask; /* TX Interrupt Mask */
volatile unsigned int qmask; /* QEC Error Interrupt Mask */
volatile unsigned int bmask; /* BigMAC Error Interrupt Mask */
volatile unsigned int rxwbufptr; /* Local memory rx write ptr */
volatile unsigned int rxrbufptr; /* Local memory rx read ptr */
volatile unsigned int txwbufptr; /* Local memory tx write ptr */
volatile unsigned int txrbufptr; /* Local memory tx read ptr */
volatile unsigned int ccnt; /* Collision Counter */
};
#define CREG_CTRL_TWAKEUP 0x00000001 /* Transmitter Wakeup, 'go'. */
#define CREG_STAT_BERROR 0x80000000 /* BigMAC error */
#define CREG_STAT_TXIRQ 0x00200000 /* Transmit Interrupt */
#define CREG_STAT_TXDERROR 0x00080000 /* TX Descriptor is bogus */
#define CREG_STAT_TXLERR 0x00040000 /* Late Transmit Error */
#define CREG_STAT_TXPERR 0x00020000 /* Transmit Parity Error */
#define CREG_STAT_TXSERR 0x00010000 /* Transmit SBUS error ack */
#define CREG_STAT_RXIRQ 0x00000020 /* Receive Interrupt */
#define CREG_STAT_RXDROP 0x00000010 /* Dropped a RX'd packet */
#define CREG_STAT_RXSMALL 0x00000008 /* Receive buffer too small */
#define CREG_STAT_RXLERR 0x00000004 /* Receive Late Error */
#define CREG_STAT_RXPERR 0x00000002 /* Receive Parity Error */
#define CREG_STAT_RXSERR 0x00000001 /* Receive SBUS Error ACK */
#define CREG_STAT_ERRORS (CREG_STAT_BERROR|CREG_STAT_TXDERROR|CREG_STAT_TXLERR| \
CREG_STAT_TXPERR|CREG_STAT_TXSERR|CREG_STAT_RXDROP| \
CREG_STAT_RXSMALL|CREG_STAT_RXLERR|CREG_STAT_RXPERR| \
CREG_STAT_RXSERR)
#define CREG_QMASK_TXDERROR 0x00080000 /* TXD error */
#define CREG_QMASK_TXLERR 0x00040000 /* TX late error */
#define CREG_QMASK_TXPERR 0x00020000 /* TX parity error */
#define CREG_QMASK_TXSERR 0x00010000 /* TX sbus error ack */
#define CREG_QMASK_RXDROP 0x00000010 /* RX drop */
#define CREG_QMASK_RXBERROR 0x00000008 /* RX buffer error */
#define CREG_QMASK_RXLEERR 0x00000004 /* RX late error */
#define CREG_QMASK_RXPERR 0x00000002 /* RX parity error */
#define CREG_QMASK_RXSERR 0x00000001 /* RX sbus error ack */
struct BIG_MAC_regs {
volatile unsigned int xif_cfg; /* XIF config register */
volatile unsigned int _unused[63]; /* Reserved... */
volatile unsigned int status; /* Status register, clear on read */
volatile unsigned int imask; /* Interrupt mask register */
volatile unsigned int _unused2[64]; /* Reserved... */
volatile unsigned int tx_swreset; /* Transmitter software reset */
volatile unsigned int tx_cfg; /* Transmitter config register */
volatile unsigned int ipkt_gap1; /* Inter-packet gap 1 */
volatile unsigned int ipkt_gap2; /* Inter-packet gap 2 */
volatile unsigned int attempt_limit; /* Transmit attempt limit */
volatile unsigned int stime; /* Transmit slot time */
volatile unsigned int preamble_len; /* Size of transmit preamble */
volatile unsigned int preamble_pattern; /* Pattern for transmit preamble */
volatile unsigned int tx_sframe_delim; /* Transmit delimiter */
volatile unsigned int jsize; /* Toe jam... */
volatile unsigned int tx_pkt_max; /* Transmit max pkt size */
volatile unsigned int tx_pkt_min; /* Transmit min pkt size */
volatile unsigned int peak_attempt; /* Count of transmit peak attempts */
volatile unsigned int dt_ctr; /* Transmit defer timer */
volatile unsigned int nc_ctr; /* Transmit normal-collision counter */
volatile unsigned int fc_ctr; /* Transmit first-collision counter */
volatile unsigned int ex_ctr; /* Transmit excess-collision counter */
volatile unsigned int lt_ctr; /* Transmit late-collision counter */
volatile unsigned int rand_seed; /* Transmit random number seed */
volatile unsigned int tx_smachine; /* Transmit state machine */
volatile unsigned int _unused3[44]; /* Reserved */
volatile unsigned int rx_swreset; /* Receiver software reset */
volatile unsigned int rx_cfg; /* Receiver config register */
volatile unsigned int rx_pkt_max; /* Receive max pkt size */
volatile unsigned int rx_pkt_min; /* Receive min pkt size */
volatile unsigned int mac_addr2; /* Ether address register 2 */
volatile unsigned int mac_addr1; /* Ether address register 1 */
volatile unsigned int mac_addr0; /* Ether address register 0 */
volatile unsigned int fr_ctr; /* Receive frame receive counter */
volatile unsigned int gle_ctr; /* Receive giant-length error counter */
volatile unsigned int unale_ctr; /* Receive unaligned error counter */
volatile unsigned int rcrce_ctr; /* Receive CRC error counter */
volatile unsigned int rx_smachine; /* Receiver state machine */
volatile unsigned int rx_cvalid; /* Receiver code violation */
volatile unsigned int _unused4; /* Reserved... */
volatile unsigned int htable3; /* Hash table 3 */
volatile unsigned int htable2; /* Hash table 2 */
volatile unsigned int htable1; /* Hash table 1 */
volatile unsigned int htable0; /* Hash table 0 */
volatile unsigned int afilter2; /* Address filter 2 */
volatile unsigned int afilter1; /* Address filter 1 */
volatile unsigned int afilter0; /* Address filter 0 */
volatile unsigned int afilter_mask; /* Address filter mask */
};
/* BigMac XIF config register. */
#define BIGMAC_XCFG_ODENABLE 0x00000001 /* Output driver enable */
#define BIGMAC_XCFG_RESV 0x00000002 /* Reserved, write always as 1 */
#define BIGMAC_XCFG_MLBACK 0x00000004 /* Loopback-mode MII enable */
#define BIGMAC_XCFG_SMODE 0x00000008 /* Enable serial mode */
/* BigMAC status register. */
#define BIGMAC_STAT_GOTFRAME 0x00000001 /* Received a frame */
#define BIGMAC_STAT_RCNTEXP 0x00000002 /* Receive frame counter expired */
#define BIGMAC_STAT_ACNTEXP 0x00000004 /* Align-error counter expired */
#define BIGMAC_STAT_CCNTEXP 0x00000008 /* CRC-error counter expired */
#define BIGMAC_STAT_LCNTEXP 0x00000010 /* Length-error counter expired */
#define BIGMAC_STAT_RFIFOVF 0x00000020 /* Receive FIFO overflow */
#define BIGMAC_STAT_CVCNTEXP 0x00000040 /* Code-violation counter expired */
#define BIGMAC_STAT_SENTFRAME 0x00000100 /* Transmitted a frame */
#define BIGMAC_STAT_TFIFO_UND 0x00000200 /* Transmit FIFO underrun */
#define BIGMAC_STAT_MAXPKTERR 0x00000400 /* Max-packet size error */
#define BIGMAC_STAT_NCNTEXP 0x00000800 /* Normal-collision counter expired */
#define BIGMAC_STAT_ECNTEXP 0x00001000 /* Excess-collision counter expired */
#define BIGMAC_STAT_LCCNTEXP 0x00002000 /* Late-collision counter expired */
#define BIGMAC_STAT_FCNTEXP 0x00004000 /* First-collision counter expired */
#define BIGMAC_STAT_DTIMEXP 0x00008000 /* Defer-timer expired */
/* BigMAC interrupt mask register. */
#define BIGMAC_IMASK_GOTFRAME 0x00000001 /* Received a frame */
#define BIGMAC_IMASK_RCNTEXP 0x00000002 /* Receive frame counter expired */
#define BIGMAC_IMASK_ACNTEXP 0x00000004 /* Align-error counter expired */
#define BIGMAC_IMASK_CCNTEXP 0x00000008 /* CRC-error counter expired */
#define BIGMAC_IMASK_LCNTEXP 0x00000010 /* Length-error counter expired */
#define BIGMAC_IMASK_RFIFOVF 0x00000020 /* Receive FIFO overflow */
#define BIGMAC_IMASK_CVCNTEXP 0x00000040 /* Code-violation counter expired */
#define BIGMAC_IMASK_SENTFRAME 0x00000100 /* Transmitted a frame */
#define BIGMAC_IMASK_TFIFO_UND 0x00000200 /* Transmit FIFO underrun */
#define BIGMAC_IMASK_MAXPKTERR 0x00000400 /* Max-packet size error */
#define BIGMAC_IMASK_NCNTEXP 0x00000800 /* Normal-collision counter expired */
#define BIGMAC_IMASK_ECNTEXP 0x00001000 /* Excess-collision counter expired */
#define BIGMAC_IMASK_LCCNTEXP 0x00002000 /* Late-collision counter expired */
#define BIGMAC_IMASK_FCNTEXP 0x00004000 /* First-collision counter expired */
#define BIGMAC_IMASK_DTIMEXP 0x00008000 /* Defer-timer expired */
/* BigMac transmit config register. */
#define BIGMAC_TXCFG_ENABLE 0x00000001 /* Enable the transmitter */
#define BIGMAC_TXCFG_FIFO 0x00000010 /* Default tx fthresh... */
#define BIGMAC_TXCFG_SMODE 0x00000020 /* Enable slow transmit mode */
#define BIGMAC_TXCFG_CIGN 0x00000040 /* Ignore transmit collisions */
#define BIGMAC_TXCFG_FCSOFF 0x00000080 /* Do not emit FCS */
#define BIGMAC_TXCFG_DBACKOFF 0x00000100 /* Disable backoff */
#define BIGMAC_TXCFG_FULLDPLX 0x00000200 /* Enable full-duplex */
/* BigMac receive config register. */
#define BIGMAC_RXCFG_ENABLE 0x00000001 /* Enable the receiver */
#define BIGMAC_RXCFG_FIFO 0x0000000e /* Default rx fthresh... */
#define BIGMAC_RXCFG_PSTRIP 0x00000020 /* Pad byte strip enable */
#define BIGMAC_RXCFG_PMISC 0x00000040 /* Enable promiscous mode */
#define BIGMAC_RXCFG_DERR 0x00000080 /* Disable error checking */
#define BIGMAC_RXCFG_DCRCS 0x00000100 /* Disable CRC stripping */
#define BIGMAC_RXCFG_ME 0x00000200 /* Receive packets addressed to me */
#define BIGMAC_RXCFG_PGRP 0x00000400 /* Enable promisc group mode */
#define BIGMAC_RXCFG_HENABLE 0x00000800 /* Enable the hash filter */
#define BIGMAC_RXCFG_AENABLE 0x00001000 /* Enable the address filter */
/* The BigMAC PHY transceiver. Not nearly as sophisticated as the happy meal
* one. But it does have the "bit banger", oh baby.
*/
struct bmac_tcvr {
unsigned int tcvr_pal;
unsigned int mgmt_pal;
};
/* Frame commands. */
#define FRAME_WRITE 0x50020000
#define FRAME_READ 0x60020000
/* Tranceiver registers. */
#define TCVR_PAL_SERIAL 0x00000001 /* Enable serial mode */
#define TCVR_PAL_EXTLBACK 0x00000002 /* Enable external loopback */
#define TCVR_PAL_MSENSE 0x00000004 /* Media sense */
#define TCVR_PAL_LTENABLE 0x00000008 /* Link test enable */
#define TCVR_PAL_LTSTATUS 0x00000010 /* Link test status (P1 only) */
/* Management PAL. */
#define MGMT_PAL_DCLOCK 0x00000001 /* Data clock */
#define MGMT_PAL_OENAB 0x00000002 /* Output enabler */
#define MGMT_PAL_MDIO 0x00000004 /* MDIO Data/attached */
#define MGMT_PAL_TIMEO 0x00000008 /* Transmit enable timeout error */
#define MGMT_PAL_EXT_MDIO MGMT_PAL_MDIO
#define MGMT_PAL_INT_MDIO MGMT_PAL_TIMEO
/* Here are some PHY addresses. */
#define BIGMAC_PHY_EXTERNAL 0 /* External transceiver */
#define BIGMAC_PHY_INTERNAL 1 /* Internal transceiver */
/* PHY registers */
#define BIGMAC_BMCR 0x00 /* Basic mode control register */
#define BIGMAC_BMSR 0x01 /* Basic mode status register */
/* BMCR bits */
#define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */
#define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */
#define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
#define BMCR_SPEED100 0x2000 /* Select 100Mbps */
#define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
#define BMCR_RESET 0x8000 /* Reset the DP83840 */
/* BMSR bits */
#define BMSR_ERCAP 0x0001 /* Ext-reg capability */
#define BMSR_JCD 0x0002 /* Jabber detected */
#define BMSR_LSTATUS 0x0004 /* Link status */
/* Ring descriptors and such, same as Quad Ethernet. */
struct be_rxd {
unsigned int rx_flags;
unsigned int rx_addr;
};
#define RXD_OWN 0x80000000 /* Ownership. */
#define RXD_UPDATE 0x10000000 /* Being Updated? */
#define RXD_LENGTH 0x000007ff /* Packet Length. */
struct be_txd {
unsigned int tx_flags;
unsigned int tx_addr;
};
#define TXD_OWN 0x80000000 /* Ownership. */
#define TXD_SOP 0x40000000 /* Start Of Packet */
#define TXD_EOP 0x20000000 /* End Of Packet */
#define TXD_UPDATE 0x10000000 /* Being Updated? */
#define TXD_LENGTH 0x000007ff /* Packet Length. */
#define TX_RING_MAXSIZE 256
#define RX_RING_MAXSIZE 256
#define TX_RING_SIZE 256
#define RX_RING_SIZE 256
#define NEXT_RX(num) (((num) + 1) & (RX_RING_SIZE - 1))
#define NEXT_TX(num) (((num) + 1) & (TX_RING_SIZE - 1))
#define PREV_RX(num) (((num) - 1) & (RX_RING_SIZE - 1))
#define PREV_TX(num) (((num) - 1) & (TX_RING_SIZE - 1))
#define TX_BUFFS_AVAIL(bp) \
(((bp)->tx_old <= (bp)->tx_new) ? \
(bp)->tx_old + (TX_RING_SIZE - 1) - (bp)->tx_new : \
(bp)->tx_old - (bp)->tx_new - 1)
#define SUN4C_TX_BUFFS_AVAIL(bp) \
(((bp)->tx_old <= (bp)->tx_new) ? \
(bp)->tx_old + (SUN4C_TX_RING_SIZE - 1) - (bp)->tx_new : \
(bp)->tx_old - (bp)->tx_new - (TX_RING_SIZE - SUN4C_TX_RING_SIZE))
#define RX_COPY_THRESHOLD 128
#define RX_BUF_ALLOC_SIZE (ETH_FRAME_LEN + (64 * 3))
struct bmac_init_block {
struct be_rxd be_rxd[RX_RING_MAXSIZE];
struct be_txd be_txd[TX_RING_MAXSIZE];
};
#define bib_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct bmac_init_block *)0)->mem[elem]))))
#define SUN4C_PKT_BUF_SZ 1546
#define SUN4C_RX_BUFF_SIZE SUN4C_PKT_BUF_SZ
#define SUN4C_TX_BUFF_SIZE SUN4C_PKT_BUF_SZ
#define SUN4C_RX_RING_SIZE 16
#define SUN4C_TX_RING_SIZE 16
struct bigmac_buffers {
char tx_buf[SUN4C_TX_RING_SIZE][SUN4C_TX_BUFF_SIZE];
char pad[2]; /* Align rx_buf for copy_and_sum(). */
char rx_buf[SUN4C_RX_RING_SIZE][SUN4C_RX_BUFF_SIZE];
};
#define bbuf_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct bigmac_buffers *)0)->mem[elem][0]))))
/* Now software state stuff. */
enum bigmac_transceiver {
external = 0,
internal = 1,
none = 2,
};
/* Timer state engine. */
enum bigmac_timer_state {
ltrywait = 1, /* Forcing try of all modes, from fastest to slowest. */
asleep = 2, /* Timer inactive. */
};
struct bigmac {
struct qe_globreg *gregs; /* QEC Global Registers */
struct qe_creg *creg; /* QEC BigMAC Channel Registers */
struct BIG_MAC_regs *bregs; /* BigMAC Registers */
struct bmac_tcvr *tregs; /* BigMAC Transceiver */
struct bmac_init_block *bmac_block; /* RX and TX descriptors */
__u32 bblock_dvma; /* RX and TX descriptors */
struct sk_buff *rx_skbs[RX_RING_SIZE];
struct sk_buff *tx_skbs[TX_RING_SIZE];
int rx_new, tx_new, rx_old, tx_old;
struct bigmac_buffers *sun4c_buffers;
__u32 s4c_buf_dvma;
int board_rev; /* BigMAC board revision. */
enum bigmac_transceiver tcvr_type;
unsigned int bigmac_bursts;
unsigned int paddr;
unsigned short sw_bmsr; /* SW copy of PHY BMSR */
unsigned short sw_bmcr; /* SW copy of PHY BMCR */
struct timer_list bigmac_timer;
enum bigmac_timer_state timer_state;
unsigned int timer_ticks;
struct enet_statistics enet_stats;
struct linux_sbus_device *qec_sbus_dev;
struct linux_sbus_device *bigmac_sbus_dev;
struct device *dev;
struct bigmac *next_module;
};
/* We use this to acquire receive skb's that we can DMA directly into. */
#define ALIGNED_RX_SKB_ADDR(addr) \
((((unsigned long)(addr) + (64 - 1)) & ~(64 - 1)) - (unsigned long)(addr))
static inline struct sk_buff *big_mac_alloc_skb(unsigned int length, int gfp_flags)
{
struct sk_buff *skb;
skb = alloc_skb(length + 64, gfp_flags);
if(skb) {
int offset = ALIGNED_RX_SKB_ADDR(skb->data);
if(offset)
skb_reserve(skb, offset);
}
return skb;
}
#endif /* !(_SUNBMAC_H) */
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