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if_ievar.h revision 1.1 
      1 /*	$NetBSD: if_ievar.h,v 1.1 1994/12/12 18:59:11 gwr Exp $	*/
      2 
      3 /*
      4  * Machine-dependent glue for the Intel Ethernet (ie) driver.
      5  */
      6 
      7 #define B_PER_F         3	/* number of buffers to allocate per frame */
      8 #define	MXFRAMES	300	/* max number of frames to allow for receive */
      9 #define	MXRXBUF (MXFRAMES*B_PER_F)	/* max number of buffers to allocate */
     10 #define	IE_RBUF_SIZE	256	/* size of each buffer, MUST BE POWER OF TWO */
     11 #define	NTXBUF		2	/* number of transmit buffer/command pairs */
     12 #define	IE_TBUF_SIZE	1512	/* length of transmit buffer */
     13 
     14 enum ie_hardware {
     15 	IE_VME,			/* multibus to VME ie card */
     16 	IE_OBIO,		/* on board */
     17 	IE_VME3E,		/* sun 3e VME card */
     18 	IE_UNKNOWN
     19 };
     20 
     21 const char *ie_hardware_names[] = {
     22 	"multibus/vme",
     23 	"onboard",
     24 	"3e/vme",
     25 	"unknown"
     26 };
     27 
     28 /*
     29  * Ethernet status, per interface.
     30  *
     31  * hardware addresses/sizes to know (all KVA):
     32  *   sc_iobase = base of chip's 24 bit address space
     33  *   sc_maddr  = base address of chip RAM as stored in ie_base of iscp
     34  *   sc_msize  = size of chip's RAM
     35  *   sc_reg    = address of card dependent registers
     36  *
     37  * the chip uses two types of pointers: 16 bit and 24 bit
     38  *   16 bit pointers are offsets from sc_maddr/ie_base
     39  *      KVA(16 bit offset) = offset + sc_maddr
     40  *   24 bit pointers are offset from sc_iobase in KVA
     41  *      KVA(24 bit address) = address + sc_iobase
     42  *
     43  * on the vme/multibus we have the page map to control where ram appears
     44  * in the address space.   we choose to have RAM start at 0 in the
     45  * 24 bit address space.   this means that sc_iobase == sc_maddr!
     46  * to get the phyiscal address of the board's RAM you must take the
     47  * top 12 bits of the physical address of the register address
     48  * and or in the 4 bits from the status word as bits 17-20 (remember that
     49  * the board ignores the chip's top 4 address lines).
     50  * For example:
     51  *   if the register is @ 0xffe88000, then the top 12 bits are 0xffe00000.
     52  *   to get the 4 bits from the the status word just do status & IEVME_HADDR.
     53  *   suppose the value is "4".   Then just shift it left 16 bits to get
     54  *   it into bits 17-20 (e.g. 0x40000).    Then or it to get the
     55  *   address of RAM (in our example: 0xffe40000).   see the attach routine!
     56  *
     57  * XXX CONFIRM THE BELOW COMMENT
     58  * on the onboard ie interface the 24 bit address space is hardwired
     59  * to be 0xff000000 -> 0xffffffff of KVA.   this means that sc_iobase
     60  * will be 0xff000000.   sc_maddr will be where ever we allocate RAM
     61  * in KVA.    note that since the SCP is at a fixed address it means
     62  * that we have to allocate a fixed KVA for the SCP.
     63  */
     64 struct ie_softc {
     65 	struct device sc_dev;	/* device structure */
     66 
     67 	struct arpcom sc_arpcom;/* system arpcom structure */
     68 #define	sc_if	sc_arpcom.ac_if 		/* network-visible interface */
     69 #define	sc_addr	sc_arpcom.ac_enaddr		/* hardware Ethernet address */
     70 
     71 	caddr_t sc_iobase;	/* KVA of base of 24bit addr space */
     72 	caddr_t sc_maddr;	/* KVA of base of chip's RAM */
     73 	u_int   sc_msize;	/* how much RAM we have/use */
     74 	caddr_t sc_reg;		/* KVA of card's register */
     75 
     76 	void    (*reset_586)();	/* card dependent reset function */
     77 	void    (*chan_attn)();	/* card dependent attn function */
     78 	void    (*run_586)();	/* card dependent "go on-line" function */
     79 
     80 	enum ie_hardware hard_type;	/* card type */
     81 	void (*memcopy) __P((const void *, void *, u_int));
     82 	void (*memzero) __P((void *, u_int));
     83 
     84 	int     want_mcsetup;	/* flag for multicast setup */
     85 	int     promisc;	/* are we in promisc mode? */
     86 
     87 	/*
     88 	 * pointers to the 3 major control structures
     89 	 */
     90 	volatile struct ie_sys_conf_ptr *scp;
     91 	volatile struct ie_int_sys_conf_ptr *iscp;
     92 	volatile struct ie_sys_ctl_block *scb;
     93 
     94 	/*
     95 	 * pointer and size of a block of KVA where the buffers
     96 	 * are to be allocated from
     97 	 */
     98 	caddr_t buf_area;
     99 	int     buf_area_sz;
    100 
    101 	/*
    102          * the actual buffers (recv and xmit)
    103          */
    104 	volatile struct ie_recv_frame_desc *rframes[MXFRAMES];
    105 	volatile struct ie_recv_buf_desc *rbuffs[MXRXBUF];
    106 	volatile char *cbuffs[MXRXBUF];
    107 	int     rfhead, rftail, rbhead, rbtail;
    108 
    109 	volatile struct ie_xmit_cmd *xmit_cmds[NTXBUF];
    110 	volatile struct ie_xmit_buf *xmit_buffs[NTXBUF];
    111 	int     xmit_count;
    112 	u_char *xmit_cbuffs[NTXBUF];
    113 
    114 	struct ie_en_addr mcast_addrs[MAXMCAST + 1];
    115 	int     mcast_count;
    116 
    117 	int     nframes, nrxbuf;
    118 #ifdef IEDEBUG
    119 	int     sc_debug;
    120 #endif
    121 };
    122 
    123 
    124 extern int  ie_md_match(struct device *, void *, void *args);
    125 extern void ie_md_attach(struct device *, struct device *, void *);
    126 extern int  ie_intr(void *);
    127