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/* $OpenBSD: if_ievar.h,v 1.4 1997/01/16 04:03:48 kstailey Exp $ */
/* $NetBSD: if_ievar.h,v 1.6 1996/03/26 14:38:33 gwr Exp $ */
/*
* Machine-dependent glue for the Intel Ethernet (ie) driver.
*/
#define B_PER_F 3 /* number of buffers to allocate per frame */
#define MXFRAMES 256 /* max number of frames to allow for receive */
#define MXRXBUF (MXFRAMES*B_PER_F) /* max number of buffers to allocate */
#define IE_RBUF_SIZE 256 /* size of each buffer, MUST BE POWER OF TWO */
#define NTXBUF 2 /* number of transmit buffer/command pairs */
#define IE_TBUF_SIZE (3*512) /* length of transmit buffer */
enum ie_hardware {
IE_VME, /* multibus to VME ie card */
IE_OBIO, /* on board */
IE_VME3E, /* sun 3e VME card */
IE_UNKNOWN
};
/*
* Ethernet status, per interface.
*
* hardware addresses/sizes to know (all KVA):
* sc_iobase = base of chip's 24 bit address space
* sc_maddr = base address of chip RAM as stored in ie_base of iscp
* sc_msize = size of chip's RAM
* sc_reg = address of card dependent registers
*
* the chip uses two types of pointers: 16 bit and 24 bit
* 16 bit pointers are offsets from sc_maddr/ie_base
* KVA(16 bit offset) = offset + sc_maddr
* 24 bit pointers are offset from sc_iobase in KVA
* KVA(24 bit address) = address + sc_iobase
*
* on the vme/multibus we have the page map to control where ram appears
* in the address space. we choose to have RAM start at 0 in the
* 24 bit address space. this means that sc_iobase == sc_maddr!
* to get the phyiscal address of the board's RAM you must take the
* top 12 bits of the physical address of the register address
* and or in the 4 bits from the status word as bits 17-20 (remember that
* the board ignores the chip's top 4 address lines).
* For example:
* if the register is @ 0xffe88000, then the top 12 bits are 0xffe00000.
* to get the 4 bits from the the status word just do status & IEVME_HADDR.
* suppose the value is "4". Then just shift it left 16 bits to get
* it into bits 17-20 (e.g. 0x40000). Then or it to get the
* address of RAM (in our example: 0xffe40000). see the attach routine!
*
* In the onboard ie interface, the 24 bit address space is hardwired
* to be 0xff000000 -> 0xffffffff of KVA. this means that sc_iobase
* will be 0xff000000. sc_maddr will be where ever we allocate RAM
* in KVA. note that since the SCP is at a fixed address it means
* that we have to use some memory at a fixed KVA for the SCP.
* The Sun PROM leaves a page for us at the end of KVA space.
*/
struct ie_softc {
struct device sc_dev; /* device structure */
struct arpcom sc_arpcom;/* system arpcom structure */
#define sc_if sc_arpcom.ac_if /* network-visible interface */
#define sc_addr sc_arpcom.ac_enaddr /* hardware Ethernet address */
caddr_t sc_iobase; /* KVA of base of 24bit addr space */
caddr_t sc_maddr; /* KVA of base of chip's RAM */
u_int sc_msize; /* how much RAM we have/use */
caddr_t sc_reg; /* KVA of card's register */
enum ie_hardware hard_type; /* card type */
void (*reset_586) __P((struct ie_softc *)); /* three card */
void (*chan_attn) __P((struct ie_softc *)); /* dependant */
void (*run_586) __P((struct ie_softc *)); /* functions */
void (*sc_bcopy) __P((const void *, void *, u_int));
void (*sc_bzero) __P((void *, u_int));
int want_mcsetup; /* flag for multicast setup */
int promisc; /* are we in promisc mode? */
/*
* pointers to the 3 major control structures
*/
volatile struct ie_sys_conf_ptr *scp;
volatile struct ie_int_sys_conf_ptr *iscp;
volatile struct ie_sys_ctl_block *scb;
/*
* pointer and size of a block of KVA where the buffers
* are to be allocated from
*/
caddr_t buf_area;
int buf_area_sz;
/*
* the actual buffers (recv and xmit)
*/
volatile struct ie_recv_frame_desc *rframes[MXFRAMES];
volatile struct ie_recv_buf_desc *rbuffs[MXRXBUF];
volatile char *cbuffs[MXRXBUF];
int rfhead, rftail, rbhead, rbtail;
volatile struct ie_xmit_cmd *xmit_cmds[NTXBUF];
volatile struct ie_xmit_buf *xmit_buffs[NTXBUF];
u_char *xmit_cbuffs[NTXBUF];
int xmit_busy;
int xmit_free;
int xchead, xctail;
struct ie_en_addr mcast_addrs[MAXMCAST + 1];
int mcast_count;
int nframes; /* number of frames in use */
int nrxbuf; /* number of recv buffs in use */
#ifdef IEDEBUG
int sc_debug;
#endif
};
extern void ie_attach __P((struct ie_softc *));
extern int ie_intr __P((void *));
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