diff options
Diffstat (limited to 'drivers/net/myri_sbus.h')
| -rw-r--r-- | drivers/net/myri_sbus.h | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/drivers/net/myri_sbus.h b/drivers/net/myri_sbus.h new file mode 100644 index 00000000000..9391e55a5e9 --- /dev/null +++ b/drivers/net/myri_sbus.h @@ -0,0 +1,313 @@ +/* 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. + */ + spinlock_t irq_lock; + struct myri_shmem __iomem *shmem; /* Shared data structures. */ + void __iomem *cregs; /* Control register space. */ + struct recvq __iomem *rqack; /* Where we ack rx's. */ + struct recvq __iomem *rq; /* Where we put buffers. */ + struct sendq __iomem *sq; /* Where we stuff tx's. */ + struct net_device *dev; /* Linux/NET dev struct. */ + int tx_old; /* To speed up tx cleaning. */ + void __iomem *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. */ + void __iomem *regs; /* MyriCOM register space. */ + void __iomem *lanai; /* View 2 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) */ |