myri_sbus.h
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上传日期:2013-02-24
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- /* myri_sbus.h: Defines for MyriCOM MyriNET SBUS card driver.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef _MYRI_SBUS_H
- #define _MYRI_SBUS_H
- /* LANAI Registers */
- #define LANAI_IPF0 0x00UL /* Context zero state registers.*/
- #define LANAI_CUR0 0x04UL
- #define LANAI_PREV0 0x08UL
- #define LANAI_DATA0 0x0cUL
- #define LANAI_DPF0 0x10UL
- #define LANAI_IPF1 0x14UL /* Context one state registers. */
- #define LANAI_CUR1 0x18UL
- #define LANAI_PREV1 0x1cUL
- #define LANAI_DATA1 0x20UL
- #define LANAI_DPF1 0x24UL
- #define LANAI_ISTAT 0x28UL /* Interrupt status. */
- #define LANAI_EIMASK 0x2cUL /* External IRQ mask. */
- #define LANAI_ITIMER 0x30UL /* IRQ timer. */
- #define LANAI_RTC 0x34UL /* Real Time Clock */
- #define LANAI_CSUM 0x38UL /* Checksum. */
- #define LANAI_DMAXADDR 0x3cUL /* SBUS DMA external address. */
- #define LANAI_DMALADDR 0x40UL /* SBUS DMA local address. */
- #define LANAI_DMACTR 0x44UL /* SBUS DMA counter. */
- #define LANAI_RXDMAPTR 0x48UL /* Receive DMA pointer. */
- #define LANAI_RXDMALIM 0x4cUL /* Receive DMA limit. */
- #define LANAI_TXDMAPTR 0x50UL /* Transmit DMA pointer. */
- #define LANAI_TXDMALIM 0x54UL /* Transmit DMA limit. */
- #define LANAI_TXDMALIMT 0x58UL /* Transmit DMA limit w/tail. */
- /* 0x5cUL, reserved */
- #define LANAI_RBYTE 0x60UL /* Receive byte. */
- /* 0x64-->0x6c, reserved */
- #define LANAI_RHALF 0x70UL /* Receive half-word. */
- /* 0x72UL, reserved */
- #define LANAI_RWORD 0x74UL /* Receive word. */
- #define LANAI_SALIGN 0x78UL /* Send align. */
- #define LANAI_SBYTE 0x7cUL /* SingleSend send-byte. */
- #define LANAI_SHALF 0x80UL /* SingleSend send-halfword. */
- #define LANAI_SWORD 0x84UL /* SingleSend send-word. */
- #define LANAI_SSENDT 0x88UL /* SingleSend special. */
- #define LANAI_DMADIR 0x8cUL /* DMA direction. */
- #define LANAI_DMASTAT 0x90UL /* DMA status. */
- #define LANAI_TIMEO 0x94UL /* Timeout register. */
- #define LANAI_MYRINET 0x98UL /* XXX MAGIC myricom thing */
- #define LANAI_HWDEBUG 0x9cUL /* Hardware debugging reg. */
- #define LANAI_LEDS 0xa0UL /* LED control. */
- #define LANAI_VERS 0xa4UL /* Version register. */
- #define LANAI_LINKON 0xa8UL /* Link activation reg. */
- /* 0xac-->0x104, reserved */
- #define LANAI_CVAL 0x108UL /* Clock value register. */
- #define LANAI_REG_SIZE 0x10cUL
- /* Interrupt status bits. */
- #define ISTAT_DEBUG 0x80000000
- #define ISTAT_HOST 0x40000000
- #define ISTAT_LAN7 0x00800000
- #define ISTAT_LAN6 0x00400000
- #define ISTAT_LAN5 0x00200000
- #define ISTAT_LAN4 0x00100000
- #define ISTAT_LAN3 0x00080000
- #define ISTAT_LAN2 0x00040000
- #define ISTAT_LAN1 0x00020000
- #define ISTAT_LAN0 0x00010000
- #define ISTAT_WRDY 0x00008000
- #define ISTAT_HRDY 0x00004000
- #define ISTAT_SRDY 0x00002000
- #define ISTAT_LINK 0x00001000
- #define ISTAT_FRES 0x00000800
- #define ISTAT_NRES 0x00000800
- #define ISTAT_WAKE 0x00000400
- #define ISTAT_OB2 0x00000200
- #define ISTAT_OB1 0x00000100
- #define ISTAT_TAIL 0x00000080
- #define ISTAT_WDOG 0x00000040
- #define ISTAT_TIME 0x00000020
- #define ISTAT_DMA 0x00000010
- #define ISTAT_SEND 0x00000008
- #define ISTAT_BUF 0x00000004
- #define ISTAT_RECV 0x00000002
- #define ISTAT_BRDY 0x00000001
- /* MYRI Registers */
- #define MYRI_RESETOFF 0x00UL
- #define MYRI_RESETON 0x04UL
- #define MYRI_IRQOFF 0x08UL
- #define MYRI_IRQON 0x0cUL
- #define MYRI_WAKEUPOFF 0x10UL
- #define MYRI_WAKEUPON 0x14UL
- #define MYRI_IRQREAD 0x18UL
- /* 0x1c-->0x3ffc, reserved */
- #define MYRI_LOCALMEM 0x4000UL
- #define MYRI_REG_SIZE 0x25000UL
- /* Shared memory interrupt mask. */
- #define SHMEM_IMASK_RX 0x00000002
- #define SHMEM_IMASK_TX 0x00000001
- /* Just to make things readable. */
- #define KERNEL_CHANNEL 0
- /* The size of this must be >= 129 bytes. */
- struct myri_eeprom {
- unsigned int cval;
- unsigned short cpuvers;
- unsigned char id[6];
- unsigned int ramsz;
- unsigned char fvers[32];
- unsigned char mvers[16];
- unsigned short dlval;
- unsigned short brd_type;
- unsigned short bus_type;
- unsigned short prod_code;
- unsigned int serial_num;
- unsigned short _reserved[24];
- unsigned int _unused[2];
- };
- /* EEPROM bus types, only SBUS is valid in this driver. */
- #define BUS_TYPE_SBUS 1
- /* EEPROM CPU revisions. */
- #define CPUVERS_2_3 0x0203
- #define CPUVERS_3_0 0x0300
- #define CPUVERS_3_1 0x0301
- #define CPUVERS_3_2 0x0302
- #define CPUVERS_4_0 0x0400
- #define CPUVERS_4_1 0x0401
- #define CPUVERS_4_2 0x0402
- #define CPUVERS_5_0 0x0500
- /* MYRI Control Registers */
- #define MYRICTRL_CTRL 0x00UL
- #define MYRICTRL_IRQLVL 0x02UL
- #define MYRICTRL_REG_SIZE 0x04UL
- /* Global control register defines. */
- #define CONTROL_ROFF 0x8000 /* Reset OFF. */
- #define CONTROL_RON 0x4000 /* Reset ON. */
- #define CONTROL_EIRQ 0x2000 /* Enable IRQ's. */
- #define CONTROL_DIRQ 0x1000 /* Disable IRQ's. */
- #define CONTROL_WON 0x0800 /* Wake-up ON. */
- #define MYRI_SCATTER_ENTRIES 8
- #define MYRI_GATHER_ENTRIES 16
- struct myri_sglist {
- u32 addr;
- u32 len;
- };
- struct myri_rxd {
- struct myri_sglist myri_scatters[MYRI_SCATTER_ENTRIES]; /* DMA scatter list.*/
- u32 csum; /* HW computed checksum. */
- u32 ctx;
- u32 num_sg; /* Total scatter entries. */
- };
- struct myri_txd {
- struct myri_sglist myri_gathers[MYRI_GATHER_ENTRIES]; /* DMA scatter list. */
- u32 num_sg; /* Total scatter entries. */
- u16 addr[4]; /* XXX address */
- u32 chan;
- u32 len; /* Total length of packet. */
- u32 csum_off; /* Where data to csum is. */
- u32 csum_field; /* Where csum goes in pkt. */
- };
- #define MYRINET_MTU 8432
- #define RX_ALLOC_SIZE 8448
- #define MYRI_PAD_LEN 2
- #define RX_COPY_THRESHOLD 256
- /* These numbers are cast in stone, new firmware is needed if
- * you want to change them.
- */
- #define TX_RING_MAXSIZE 16
- #define RX_RING_MAXSIZE 16
- #define TX_RING_SIZE 16
- #define RX_RING_SIZE 16
- /* GRRR... */
- static __inline__ int NEXT_RX(int num)
- {
- /* XXX >=??? */
- if(++num > RX_RING_SIZE)
- num = 0;
- return num;
- }
- static __inline__ int PREV_RX(int num)
- {
- if(--num < 0)
- num = RX_RING_SIZE;
- return num;
- }
- #define NEXT_TX(num) (((num) + 1) & (TX_RING_SIZE - 1))
- #define PREV_TX(num) (((num) - 1) & (TX_RING_SIZE - 1))
- #define TX_BUFFS_AVAIL(head, tail)
- ((head) <= (tail) ?
- (head) + (TX_RING_SIZE - 1) - (tail) :
- (head) - (tail) - 1)
- struct sendq {
- u32 tail;
- u32 head;
- u32 hdebug;
- u32 mdebug;
- struct myri_txd myri_txd[TX_RING_MAXSIZE];
- };
- struct recvq {
- u32 head;
- u32 tail;
- u32 hdebug;
- u32 mdebug;
- struct myri_rxd myri_rxd[RX_RING_MAXSIZE + 1];
- };
- #define MYRI_MLIST_SIZE 8
- struct mclist {
- u32 maxlen;
- u32 len;
- u32 cache;
- struct pair {
- u8 addr[8];
- u32 val;
- } mc_pairs[MYRI_MLIST_SIZE];
- u8 bcast_addr[8];
- };
- struct myri_channel {
- u32 state; /* State of the channel. */
- u32 busy; /* Channel is busy. */
- struct sendq sendq; /* Device tx queue. */
- struct recvq recvq; /* Device rx queue. */
- struct recvq recvqa; /* Device rx queue acked. */
- u32 rbytes; /* Receive bytes. */
- u32 sbytes; /* Send bytes. */
- u32 rmsgs; /* Receive messages. */
- u32 smsgs; /* Send messages. */
- struct mclist mclist; /* Device multicast list. */
- };
- /* Values for per-channel state. */
- #define STATE_WFH 0 /* Waiting for HOST. */
- #define STATE_WFN 1 /* Waiting for NET. */
- #define STATE_READY 2 /* Ready. */
- struct myri_shmem {
- u8 addr[8]; /* Board's address. */
- u32 nchan; /* Number of channels. */
- u32 burst; /* SBUS dma burst enable. */
- u32 shakedown; /* DarkkkkStarrr Crashesss... */
- u32 send; /* Send wanted. */
- u32 imask; /* Interrupt enable mask. */
- u32 mlevel; /* Map level. */
- u32 debug[4]; /* Misc. debug areas. */
- struct myri_channel channel; /* Only one channel on a host. */
- };
- struct myri_eth {
- /* These are frequently accessed, keep together
- * to obtain good cache hit rates.
- */
- struct myri_shmem *shmem; /* Shared data structures. */
- unsigned long cregs; /* Control register space. */
- struct recvq *rqack; /* Where we ack rx's. */
- struct recvq *rq; /* Where we put buffers. */
- struct sendq *sq; /* Where we stuff tx's. */
- struct net_device *dev; /* Linux/NET dev struct. */
- int tx_old; /* To speed up tx cleaning. */
- unsigned long lregs; /* Quick ptr to LANAI regs. */
- struct sk_buff *rx_skbs[RX_RING_SIZE+1];/* RX skb's */
- struct sk_buff *tx_skbs[TX_RING_SIZE]; /* TX skb's */
- struct net_device_stats enet_stats; /* Interface stats. */
- /* These are less frequently accessed. */
- unsigned long regs; /* MyriCOM register space. */
- unsigned short *lanai; /* View 2 of register space. */
- unsigned int *lanai3; /* View 3 of register space. */
- unsigned int myri_bursts; /* SBUS bursts. */
- struct myri_eeprom eeprom; /* Local copy of EEPROM. */
- unsigned int reg_size; /* Size of register space. */
- unsigned int shmem_base; /* Offset to shared ram. */
- struct sbus_dev *myri_sdev; /* Our SBUS device struct. */
- struct myri_eth *next_module; /* Next in adapter chain. */
- };
- /* 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 *myri_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 /* !(_MYRI_SBUS_H) */