120 lines
4.3 KiB
C
120 lines
4.3 KiB
C
/* $NetBSD: if_ie_subr.h,v 1.2 1994/12/15 21:08:11 gwr Exp $ */
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/*
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* Machine-dependent glue for the Intel Ethernet (ie) driver.
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*/
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#define B_PER_F 3 /* number of buffers to allocate per frame */
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#define MXFRAMES 300 /* max number of frames to allow for receive */
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#define MXRXBUF (MXFRAMES*B_PER_F) /* max number of buffers to allocate */
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#define IE_RBUF_SIZE 256 /* size of each buffer, MUST BE POWER OF TWO */
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#define NTXBUF 2 /* number of transmit buffer/command pairs */
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#define IE_TBUF_SIZE 1512 /* length of transmit buffer */
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enum ie_hardware {
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IE_VME, /* multibus to VME ie card */
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IE_OBIO, /* on board */
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IE_VME3E, /* sun 3e VME card */
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IE_UNKNOWN
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};
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/*
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* Ethernet status, per interface.
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*
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* hardware addresses/sizes to know (all KVA):
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* sc_iobase = base of chip's 24 bit address space
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* sc_maddr = base address of chip RAM as stored in ie_base of iscp
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* sc_msize = size of chip's RAM
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* sc_reg = address of card dependent registers
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*
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* the chip uses two types of pointers: 16 bit and 24 bit
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* 16 bit pointers are offsets from sc_maddr/ie_base
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* KVA(16 bit offset) = offset + sc_maddr
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* 24 bit pointers are offset from sc_iobase in KVA
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* KVA(24 bit address) = address + sc_iobase
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*
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* on the vme/multibus we have the page map to control where ram appears
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* in the address space. we choose to have RAM start at 0 in the
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* 24 bit address space. this means that sc_iobase == sc_maddr!
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* to get the phyiscal address of the board's RAM you must take the
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* top 12 bits of the physical address of the register address
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* and or in the 4 bits from the status word as bits 17-20 (remember that
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* the board ignores the chip's top 4 address lines).
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* For example:
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* if the register is @ 0xffe88000, then the top 12 bits are 0xffe00000.
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* to get the 4 bits from the the status word just do status & IEVME_HADDR.
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* suppose the value is "4". Then just shift it left 16 bits to get
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* it into bits 17-20 (e.g. 0x40000). Then or it to get the
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* address of RAM (in our example: 0xffe40000). see the attach routine!
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*
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* XXX CONFIRM THE BELOW COMMENT
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* on the onboard ie interface the 24 bit address space is hardwired
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* to be 0xff000000 -> 0xffffffff of KVA. this means that sc_iobase
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* will be 0xff000000. sc_maddr will be where ever we allocate RAM
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* in KVA. note that since the SCP is at a fixed address it means
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* that we have to allocate a fixed KVA for the SCP.
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*/
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struct ie_softc {
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struct device sc_dev; /* device structure */
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struct arpcom sc_arpcom;/* system arpcom structure */
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#define sc_if sc_arpcom.ac_if /* network-visible interface */
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#define sc_addr sc_arpcom.ac_enaddr /* hardware Ethernet address */
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caddr_t sc_iobase; /* KVA of base of 24bit addr space */
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caddr_t sc_maddr; /* KVA of base of chip's RAM */
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u_int sc_msize; /* how much RAM we have/use */
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caddr_t sc_reg; /* KVA of card's register */
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void (*reset_586)(); /* card dependent reset function */
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void (*chan_attn)(); /* card dependent attn function */
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void (*run_586)(); /* card dependent "go on-line" function */
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enum ie_hardware hard_type; /* card type */
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void (*memcopy) __P((const void *, void *, u_int));
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void (*memzero) __P((void *, u_int));
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int want_mcsetup; /* flag for multicast setup */
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int promisc; /* are we in promisc mode? */
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/*
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* pointers to the 3 major control structures
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*/
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volatile struct ie_sys_conf_ptr *scp;
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volatile struct ie_int_sys_conf_ptr *iscp;
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volatile struct ie_sys_ctl_block *scb;
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/*
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* pointer and size of a block of KVA where the buffers
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* are to be allocated from
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*/
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caddr_t buf_area;
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int buf_area_sz;
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/*
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* the actual buffers (recv and xmit)
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*/
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volatile struct ie_recv_frame_desc *rframes[MXFRAMES];
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volatile struct ie_recv_buf_desc *rbuffs[MXRXBUF];
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volatile char *cbuffs[MXRXBUF];
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int rfhead, rftail, rbhead, rbtail;
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volatile struct ie_xmit_cmd *xmit_cmds[NTXBUF];
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volatile struct ie_xmit_buf *xmit_buffs[NTXBUF];
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int xmit_count;
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u_char *xmit_cbuffs[NTXBUF];
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struct ie_en_addr mcast_addrs[MAXMCAST + 1];
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int mcast_count;
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int nframes, nrxbuf;
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#ifdef IEDEBUG
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int sc_debug;
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#endif
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};
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extern int ie_md_match(struct device *, void *, void *args);
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extern void ie_md_attach(struct device *, struct device *, void *);
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extern int ie_intr(void *);
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