sunhme.h

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#define NCONFIG_UTP             0x0008  /* 1=UTP, 0=STP                */
#define NCONFIG_HBEAT           0x0010  /* Heart-beat enable           */
#define NCONFIG_LDISABLE        0x0020  /* Disable the link            */
#define NCONFIG_RESV2           0xffc0  /* Unused...                   */

/* Happy Meal descriptor rings and such.
 * All descriptor rings must be aligned on a 2K boundry.
 * All receive buffers must be 64 byte aligned.
 * Always write the address first before setting the ownership
 * bits to avoid races with the hardware scanning the ring.
 */
struct happy_meal_rxd {
	u32 rx_flags;
	u32 rx_addr;
};

#define RXFLAG_OWN         0x80000000 /* 1 = hardware, 0 = software */
#define RXFLAG_OVERFLOW    0x40000000 /* 1 = buffer overflow        */
#define RXFLAG_SIZE        0x3fff0000 /* Size of the buffer         */
#define RXFLAG_CSUM        0x0000ffff /* HW computed checksum       */

struct happy_meal_txd {
	u32 tx_flags;
	u32 tx_addr;
};

#define TXFLAG_OWN         0x80000000 /* 1 = hardware, 0 = software */
#define TXFLAG_SOP         0x40000000 /* 1 = start of packet        */
#define TXFLAG_EOP         0x20000000 /* 1 = end of packet          */
#define TXFLAG_CSENABLE    0x10000000 /* 1 = enable hw-checksums    */
#define TXFLAG_CSLOCATION  0x0ff00000 /* Where to stick the csum    */
#define TXFLAG_CSBUFBEGIN  0x000fc000 /* Where to begin checksum    */
#define TXFLAG_SIZE        0x00003fff /* Size of the packet         */

#define TX_RING_SIZE       32         /* Must be >16 and <255, multiple of 16  */
#define RX_RING_SIZE       32         /* see ERX_CFG_SIZE* for possible values */

#define TX_RING_MAXSIZE    256
#define RX_RING_MAXSIZE    256

/* 34 byte offset for checksum computation.  This works because ip_input() will clear out
 * the skb->csum and skb->ip_summed fields and recompute the csum if IP options are
 * present in the header.  34 == (ethernet header len) + sizeof(struct iphdr)
 */
#define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE32|(0x22<<16))

#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(hp)                                    \
        (((hp)->tx_old <= (hp)->tx_new) ?                     \
	  (hp)->tx_old + (TX_RING_SIZE - 1) - (hp)->tx_new :  \
			    (hp)->tx_old - (hp)->tx_new - 1)

#define RX_OFFSET          2
#define RX_BUF_ALLOC_SIZE  (1546 + RX_OFFSET + 64)

#define RX_COPY_THRESHOLD  256

struct hmeal_init_block {
	struct happy_meal_rxd happy_meal_rxd[RX_RING_MAXSIZE];
	struct happy_meal_txd happy_meal_txd[TX_RING_MAXSIZE];
};

#define hblock_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct hmeal_init_block *)0)->mem[elem]))))

/* Now software state stuff. */
enum happy_transceiver {
	external = 0,
	internal = 1,
	none     = 2,
};

/* Timer state engine. */
enum happy_timer_state {
	arbwait  = 0,  /* Waiting for auto negotiation to complete.          */
	lupwait  = 1,  /* Auto-neg complete, awaiting link-up status.        */
	ltrywait = 2,  /* Forcing try of all modes, from fastest to slowest. */
	asleep   = 3,  /* Time inactive.                                     */
};

struct quattro;

/* Happy happy, joy joy! */
struct happy_meal {
	unsigned long	gregs;			/* Happy meal global registers       */
	struct hmeal_init_block  *happy_block;	/* RX and TX descriptors (CPU addr)  */

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
	u32 (*read_desc32)(u32 *);
	void (*write_txd)(struct happy_meal_txd *, u32, u32);
	void (*write_rxd)(struct happy_meal_rxd *, u32, u32);
	u32 (*dma_map)(void *, void *, long, int);
	void (*dma_unmap)(void *, u32, long, int);
	void (*dma_sync)(void *, u32, long, int);
#endif

	/* This is either a sbus_dev or a pci_dev. */
	void			  *happy_dev;

	spinlock_t		  happy_lock;

	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 net_device_stats	  net_stats;      /* Statistical counters              */

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
	u32 (*read32)(unsigned long);
	void (*write32)(unsigned long, u32);
#endif

	unsigned long	etxregs;        /* External transmitter regs         */
	unsigned long	erxregs;        /* External receiver regs            */
	unsigned long	bigmacregs;     /* BIGMAC core regs		     */
	unsigned long	tcvregs;        /* MIF transceiver regs              */

	__u32                     hblock_dvma;    /* DVMA visible address happy block  */
	unsigned int              happy_flags;    /* Driver state flags                */
	enum happy_transceiver    tcvr_type;      /* Kind of transceiver in use        */
	unsigned int              happy_bursts;   /* Get your mind out of the gutter   */
	unsigned int              paddr;          /* PHY address for transceiver       */
	unsigned short            hm_revision;    /* Happy meal revision               */
	unsigned short            sw_bmcr;        /* SW copy of BMCR                   */
	unsigned short            sw_bmsr;        /* SW copy of BMSR                   */
	unsigned short            sw_physid1;     /* SW copy of PHYSID1                */
	unsigned short            sw_physid2;     /* SW copy of PHYSID2                */
	unsigned short            sw_advertise;   /* SW copy of ADVERTISE              */
	unsigned short            sw_lpa;         /* SW copy of LPA                    */
	unsigned short            sw_expansion;   /* SW copy of EXPANSION              */
	unsigned short            sw_csconfig;    /* SW copy of CSCONFIG               */
	unsigned int              auto_speed;     /* Auto-nego link speed              */
        unsigned int              forced_speed;   /* Force mode link speed             */
	unsigned int              poll_data;      /* MIF poll data                     */
	unsigned int              poll_flag;      /* MIF poll flag                     */
	unsigned int              linkcheck;      /* Have we checked the link yet?     */
	unsigned int              lnkup;          /* Is the link up as far as we know? */
	unsigned int              lnkdown;        /* Trying to force the link down?    */
	unsigned int              lnkcnt;         /* Counter for link-up attempts.     */
	struct timer_list         happy_timer;    /* To watch the link when coming up. */
	enum happy_timer_state    timer_state;    /* State of the auto-neg timer.      */
	unsigned int              timer_ticks;    /* Number of clicks at each state.   */

	struct net_device	 *dev;		/* Backpointer                       */
	struct quattro		 *qfe_parent;	/* For Quattro cards                 */
	int			  qfe_ent;	/* Which instance on quattro         */
	struct happy_meal         *next_module;
};

/* Here are the happy flags. */
#define HFLAG_POLL                0x00000001      /* We are doing MIF polling          */
#define HFLAG_FENABLE             0x00000002      /* The MII frame is enabled          */
#define HFLAG_LANCE               0x00000004      /* We are using lance-mode           */
#define HFLAG_RXENABLE            0x00000008      /* Receiver is enabled               */
#define HFLAG_AUTO                0x00000010      /* Using auto-negotiation, 0 = force */
#define HFLAG_FULL                0x00000020      /* Full duplex enable                */
#define HFLAG_MACFULL             0x00000040      /* Using full duplex in the MAC      */
#define HFLAG_POLLENABLE          0x00000080      /* Actually try MIF polling          */
#define HFLAG_RXCV                0x00000100      /* XXX RXCV ENABLE                   */
#define HFLAG_INIT                0x00000200      /* Init called at least once         */
#define HFLAG_LINKUP              0x00000400      /* 1 = Link is up                    */
#define HFLAG_PCI                 0x00000800      /* PCI based Happy Meal              */
#define HFLAG_QUATTRO		  0x00001000      /* On QFE/Quattro card	       */

#define HFLAG_20_21  (HFLAG_POLLENABLE | HFLAG_FENABLE)
#define HFLAG_NOT_A0 (HFLAG_POLLENABLE | HFLAG_FENABLE | HFLAG_LANCE | HFLAG_RXCV)

/* Support for QFE/Quattro cards. */
struct quattro {
	struct net_device	*happy_meals[4];

	/* This is either a sbus_dev or a pci_dev. */
	void			*quattro_dev;

	struct quattro		*next;

	/* PROM ranges, if any. */
#ifdef CONFIG_SBUS
	struct linux_prom_ranges  ranges[8];
#endif
	int			  nranges;
};

/* We use this to acquire receive skb's that we can DMA directly into. */
#define ALIGNED_RX_SKB_ADDR(addr) \
        ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr))
#define happy_meal_alloc_skb(__length, __gfp_flags) \
({	struct sk_buff *__skb; \
	__skb = alloc_skb((__length) + 64, (__gfp_flags)); \
	if(__skb) { \
		int __offset = (int) ALIGNED_RX_SKB_ADDR(__skb->data); \
		if(__offset) \
			skb_reserve(__skb, __offset); \
	} \
	__skb; \
})

#endif /* !(_SUNHME_H) */