NetBSD/sys/dev/tc/if_le_ioasic.c

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1998-07-05 04:51:04 +04:00
/* $NetBSD: if_le_ioasic.c,v 1.11 1998/07/05 00:51:25 jonathan Exp $ */
/*
* Copyright (c) 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* LANCE on DEC IOCTL ASIC.
*/
#include <sys/cdefs.h> /* RCS ID & macro defns */
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__KERNEL_RCSID(0, "$NetBSD: if_le_ioasic.c,v 1.11 1998/07/05 00:51:25 jonathan Exp $");
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <net/if.h>
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#include <net/if_ether.h>
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#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>
#include <dev/tc/if_levar.h>
#include <dev/tc/tcvar.h>
#include <dev/tc/ioasicvar.h>
extern caddr_t le_iomem;
int le_ioasic_match __P((struct device *, struct cfdata *, void *));
void le_ioasic_attach __P((struct device *, struct device *, void *));
hide void le_ioasic_copytobuf_gap2 __P((struct am7990_softc *, void *,
int, int));
hide void le_ioasic_copyfrombuf_gap2 __P((struct am7990_softc *, void *,
int, int));
hide void le_ioasic_copytobuf_gap16 __P((struct am7990_softc *, void *,
int, int));
hide void le_ioasic_copyfrombuf_gap16 __P((struct am7990_softc *, void *,
int, int));
hide void le_ioasic_zerobuf_gap16 __P((struct am7990_softc *, int, int));
struct cfattach le_ioasic_ca = {
sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach
};
int
le_ioasic_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct ioasicdev_attach_args *d = aux;
if (!ioasic_submatch(match, aux))
return (0);
if (strncmp("lance", d->iada_modname, TC_ROM_LLEN))
return (0);
return (1);
}
void
le_ioasic_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ioasicdev_attach_args *d = aux;
register struct le_softc *lesc = (void *)self;
register struct am7990_softc *sc = &lesc->sc_am7990;
lesc->sc_r1 = (struct lereg1 *)
TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr));
sc->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem);
sc->sc_copytodesc = le_ioasic_copytobuf_gap2;
sc->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2;
sc->sc_copytobuf = le_ioasic_copytobuf_gap16;
sc->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16;
sc->sc_zerobuf = le_ioasic_zerobuf_gap16;
if (le_iomem == 0) {
printf("%s: DMA area not set up\n", sc->sc_dev.dv_xname);
return;
}
#ifndef __alpha__
ioasic_lance_dma_setup(le_iomem); /* XXX more thought */
#endif
dec_le_common_attach(sc, ioasic_lance_ether_address());
ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET,
am7990_intr, sc);
}
/*
* Special memory access functions needed by ioasic-attached LANCE
* chips.
*/
/*
* gap2: two bytes of data followed by two bytes of pad.
*
* Buffers must be 4-byte aligned. The code doesn't worry about
* doing an extra byte.
*/
void
le_ioasic_copytobuf_gap2(sc, fromv, boff, len)
struct am7990_softc *sc;
void *fromv;
int boff;
register int len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t from = fromv;
register volatile u_int16_t *bptr;
if (boff & 0x1) {
/* handle unaligned first byte */
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
*bptr = (*from++ << 8) | (*bptr & 0xff);
bptr += 2;
len--;
} else
bptr = ((volatile u_int16_t *)buf) + boff;
while (len > 1) {
*bptr = (from[1] << 8) | (from[0] & 0xff);
bptr += 2;
from += 2;
len -= 2;
}
if (len == 1)
*bptr = (u_int16_t)*from;
}
void
le_ioasic_copyfrombuf_gap2(sc, tov, boff, len)
struct am7990_softc *sc;
void *tov;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t to = tov;
register volatile u_int16_t *bptr;
register u_int16_t tmp;
if (boff & 0x1) {
/* handle unaligned first byte */
bptr = ((volatile u_int16_t *)buf) + (boff - 1);
*to++ = (*bptr >> 8) & 0xff;
bptr += 2;
len--;
} else
bptr = ((volatile u_int16_t *)buf) + boff;
while (len > 1) {
tmp = *bptr;
*to++ = tmp & 0xff;
*to++ = (tmp >> 8) & 0xff;
bptr += 2;
len -= 2;
}
if (len == 1)
*to = *bptr & 0xff;
}
/*
* gap16: 16 bytes of data followed by 16 bytes of pad.
*
* Buffers must be 32-byte aligned.
*/
void
le_ioasic_copytobuf_gap16(sc, fromv, boff, len)
struct am7990_softc *sc;
void *fromv;
int boff;
register int len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t from = fromv;
register caddr_t bptr;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
/*
* Dispose of boff so destination of subsequent copies is
* 16-byte aligned.
*/
if (boff) {
register int xfer;
xfer = min(len, 16 - boff);
bcopy(from, bptr + boff, xfer);
from += xfer;
bptr += 32;
len -= xfer;
}
/* Destination of copies is now 16-byte aligned. */
if (len >= 16)
switch ((u_long)from & (sizeof(u_int32_t) -1)) {
case 2:
/* Ethernet headers make this the dominant case. */
do {
register u_int32_t *dst = (u_int32_t*)bptr;
register u_int16_t t0;
register u_int32_t t1, t2, t3, t4;
/* read from odd-16-bit-aligned, cached src */
t0 = *(u_int16_t*)from;
t1 = *(u_int32_t*)(from+2);
t2 = *(u_int32_t*)(from+6);
t3 = *(u_int32_t*)(from+10);
t4 = *(u_int16_t*)(from+14);
/* DMA buffer is uncached on mips */
dst[0] = t0 | (t1 << 16);
dst[1] = (t1 >> 16) | (t2 << 16);
dst[2] = (t2 >> 16) | (t3 << 16);
dst[3] = (t3 >> 16) | (t4 << 16);
from += 16;
bptr += 32;
len -= 16;
} while (len >= 16);
break;
case 0:
do {
register u_int32_t *src = (u_int32_t*)from;
register u_int32_t *dst = (u_int32_t*)bptr;
register u_int32_t t0, t1, t2, t3;
t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3];
dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3;
from += 16;
bptr += 32;
len -= 16;
} while (len >= 16);
break;
default:
/* Does odd-aligned case ever happen? */
do {
bcopy(from, bptr, 16);
from += 16;
bptr += 32;
len -= 16;
} while (len >= 16);
break;
}
if (len)
bcopy(from, bptr, len);
}
void
le_ioasic_copyfrombuf_gap16(sc, tov, boff, len)
struct am7990_softc *sc;
void *tov;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t to = tov;
register caddr_t bptr;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
/* Dispose of boff. source of copy is subsequently 16-byte aligned. */
if (boff) {
register int xfer;
xfer = min(len, 16 - boff);
bcopy(bptr+boff, to, xfer);
to += xfer;
bptr += 32;
len -= xfer;
}
if (len >= 16)
switch ((u_long)to & (sizeof(u_int32_t) -1)) {
case 2:
/*
* to is aligned to an odd 16-bit boundary. Ethernet headers
* make this the dominant case (98% or more).
*/
do {
register u_int32_t *src = (u_int32_t*)bptr;
register u_int32_t t0, t1, t2, t3;
/* read from uncached aligned DMA buf */
t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3];
/* write to odd-16-bit-word aligned dst */
*(u_int16_t *) (to+0) = (u_short) t0;
*(u_int32_t *) (to+2) = (t0 >> 16) | (t1 << 16);
*(u_int32_t *) (to+6) = (t1 >> 16) | (t2 << 16);
*(u_int32_t *) (to+10) = (t2 >> 16) | (t3 << 16);
*(u_int16_t *) (to+14) = (t3 >> 16);
bptr += 32;
to += 16;
len -= 16;
} while (len > 16);
break;
case 0:
/* 32-bit aligned aligned copy. Rare. */
do {
register u_int32_t *src = (u_int32_t*)bptr;
register u_int32_t *dst = (u_int32_t*)to;
register u_int32_t t0, t1, t2, t3;
t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3];
dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3;
to += 16;
bptr += 32;
len -= 16;
} while (len > 16);
break;
/* XXX Does odd-byte-aligned case ever happen? */
default:
do {
bcopy(bptr, to, 16);
to += 16;
bptr += 32;
len -= 16;
} while (len > 16);
break;
}
if (len)
bcopy(bptr, to, len);
}
void
le_ioasic_zerobuf_gap16(sc, boff, len)
struct am7990_softc *sc;
int boff, len;
{
volatile caddr_t buf = sc->sc_mem;
register caddr_t bptr;
register int xfer;
bptr = buf + ((boff << 1) & ~0x1f);
boff &= 0xf;
xfer = min(len, 16 - boff);
while (len > 0) {
bzero(bptr + boff, xfer);
bptr += 32;
boff = 0;
len -= xfer;
xfer = min(len, 16);
}
}