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head/stand/libofw/ofw_net.c

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/*-
* Copyright (c) 2000-2001 Benno Rice
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <stand.h>
#include <net.h>
#include <netif.h>
#include "openfirm.h"
static int ofwn_probe(struct netif *, void *);
static int ofwn_match(struct netif *, void *);
static void ofwn_init(struct iodesc *, void *);
static ssize_t ofwn_get(struct iodesc *, void **, time_t);
static ssize_t ofwn_put(struct iodesc *, void *, size_t);
static void ofwn_end(struct netif *);
extern struct netif_stats ofwn_stats[];
struct netif_dif ofwn_ifs[] = {
/* dif_unit dif_nsel dif_stats dif_private */
{ 0, 1, &ofwn_stats[0], 0, },
};
struct netif_stats ofwn_stats[nitems(ofwn_ifs)];
struct netif_driver ofwnet = {
"net", /* netif_bname */
ofwn_match, /* netif_match */
ofwn_probe, /* netif_probe */
ofwn_init, /* netif_init */
ofwn_get, /* netif_get */
ofwn_put, /* netif_put */
ofwn_end, /* netif_end */
ofwn_ifs, /* netif_ifs */
nitems(ofwn_ifs) /* netif_nifs */
};
static ihandle_t netinstance;
static void *dmabuf;
static int
ofwn_match(struct netif *nif, void *machdep_hint)
{
return 1;
}
static int
ofwn_probe(struct netif *nif, void *machdep_hint)
{
return 0;
}
static ssize_t
ofwn_put(struct iodesc *desc, void *pkt, size_t len)
{
size_t sendlen;
ssize_t rv;
#if defined(NETIF_DEBUG)
struct ether_header *eh;
printf("netif_put: desc=0x%x pkt=0x%x len=%d\n", desc, pkt, len);
eh = pkt;
printf("dst: %s ", ether_sprintf(eh->ether_dhost));
printf("src: %s ", ether_sprintf(eh->ether_shost));
printf("type: 0x%x\n", eh->ether_type & 0xffff);
#endif
sendlen = len;
if (sendlen < 60) {
sendlen = 60;
#if defined(NETIF_DEBUG)
printf("netif_put: length padded to %d\n", sendlen);
#endif
}
if (dmabuf) {
bcopy(pkt, dmabuf, sendlen);
pkt = dmabuf;
}
rv = OF_write(netinstance, pkt, len);
#if defined(NETIF_DEBUG)
printf("netif_put: OF_write returned %d\n", rv);
#endif
return rv;
}
static ssize_t
ofwn_get(struct iodesc *desc, void **pkt, time_t timeout)
{
time_t t;
ssize_t length;
size_t len;
char *buf, *ptr;
#if defined(NETIF_DEBUG)
printf("netif_get: pkt=%p, timeout=%d\n", pkt, timeout);
#endif
/*
* We should read the "max-frame-size" int property instead,
* but at this time the iodesc does not have mtu, so we will take
* a small shortcut here.
*/
len = ETHER_MAX_LEN;
buf = malloc(len + ETHER_ALIGN);
if (buf == NULL)
return (-1);
ptr = buf + ETHER_ALIGN;
t = getsecs();
do {
length = OF_read(netinstance, ptr, len);
} while ((length == -2 || length == 0) &&
(getsecs() - t < timeout));
#if defined(NETIF_DEBUG)
printf("netif_get: received length=%d (%x)\n", length, length);
#endif
if (length < 12) {
free(buf);
return (-1);
}
#if defined(NETIF_VERBOSE_DEBUG)
{
char *ch = ptr;
int i;
for(i = 0; i < 96; i += 4) {
printf("%02x%02x%02x%02x ", ch[i], ch[i+1],
ch[i+2], ch[i+3]);
}
printf("\n");
}
#endif
#if defined(NETIF_DEBUG)
{
struct ether_header *eh = ptr;
printf("dst: %s ", ether_sprintf(eh->ether_dhost));
printf("src: %s ", ether_sprintf(eh->ether_shost));
printf("type: 0x%x\n", eh->ether_type & 0xffff);
}
#endif
*pkt = buf;
return (length);
}
extern char *strchr();
static void
ofwn_init(struct iodesc *desc, void *machdep_hint)
{
phandle_t netdev;
char path[64];
char *ch;
int pathlen;
pathlen = OF_getprop(chosen, "bootpath", path, 64);
if ((ch = strchr(path, ':')) != NULL)
*ch = '\0';
netdev = OF_finddevice(path);
#ifdef __sparc64__
if (OF_getprop(netdev, "mac-address", desc->myea, 6) == -1)
#else
if (OF_getprop(netdev, "local-mac-address", desc->myea, 6) == -1)
#endif
goto punt;
printf("boot: ethernet address: %s\n", ether_sprintf(desc->myea));
if ((netinstance = OF_open(path)) == -1) {
printf("Could not open network device.\n");
goto punt;
}
#if defined(NETIF_DEBUG)
printf("ofwn_init: Open Firmware instance handle: %08x\n", netinstance);
#endif
#ifndef __sparc64__
dmabuf = NULL;
if (OF_call_method("dma-alloc", netinstance, 1, 1, (64 * 1024), &dmabuf)
< 0) {
printf("Failed to allocate DMA buffer (got %p).\n", dmabuf);
goto punt;
}
#if defined(NETIF_DEBUG)
printf("ofwn_init: allocated DMA buffer: %p\n", dmabuf);
#endif
#endif
return;
punt:
printf("\n");
printf("Could not boot from %s.\n", path);
OF_enter();
}
static void
ofwn_end(struct netif *nif)
{
#ifdef BROKEN
/* dma-free freezes at least some Apple ethernet controllers */
OF_call_method("dma-free", netinstance, 2, 0, dmabuf, MAXPHYS);
#endif
OF_close(netinstance);
}
#if 0
int
ofwn_getunit(const char *path)
{
int i;
char newpath[255];
OF_canon(path, newpath, 254);
for (i = 0; i < nofwninfo; i++) {
printf(">>> test =\t%s\n", ofwninfo[i].ofwn_path);
if (strcmp(path, ofwninfo[i].ofwn_path) == 0)
return i;
if (strcmp(newpath, ofwninfo[i].ofwn_path) == 0)
return i;
}
return -1;
}
#endif