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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.
*/
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. */
};
/* 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, gfp_t 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) */
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