da8fb057e5
The current read from network is working from up to down - we have some protocol needing the data from the network, so we build the buffer space for that protocol, add the extra space for headers and pass this buffer down to be filled by nif get call in hope, we have guessed the incoming packet size right. Amazingly enough this approach mostly does work, but not always... So, this update does work from down to up - we allocate buffer (based on MTU or frame size info), fill it up, and pass on for upper layers. The obvious problem is that when we should free the buffer - if at all. In the current implementation the upper layer will free the packet on error or when the packet is no longer needed. While working on the issue, the additional issue did pop up - the bios implementation does not have generic get/put interface but is using pxe udpsend/udpreceive instead. So the udp calls are gone and undi interface is implemented instead. Which in turn means slight other changes as we do not need to have duplicated pxe implementation and can just use dev_net. To align packet content, the actual read from nic is using shifted buffer by ETHER_ALIGN (2). Reviewed by: bapt Differential Revision: https://reviews.freebsd.org/D10232
276 lines
6.3 KiB
C
276 lines
6.3 KiB
C
/*-
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* Copyright (c) 2000-2001 Benno Rice
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip.h>
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#include <stand.h>
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#include <net.h>
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#include <netif.h>
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#include "openfirm.h"
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static int ofwn_probe(struct netif *, void *);
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static int ofwn_match(struct netif *, void *);
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static void ofwn_init(struct iodesc *, void *);
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static ssize_t ofwn_get(struct iodesc *, void **, time_t);
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static ssize_t ofwn_put(struct iodesc *, void *, size_t);
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static void ofwn_end(struct netif *);
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extern struct netif_stats ofwn_stats[];
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struct netif_dif ofwn_ifs[] = {
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/* dif_unit dif_nsel dif_stats dif_private */
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{ 0, 1, &ofwn_stats[0], 0, },
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};
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struct netif_stats ofwn_stats[nitems(ofwn_ifs)];
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struct netif_driver ofwnet = {
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"net", /* netif_bname */
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ofwn_match, /* netif_match */
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ofwn_probe, /* netif_probe */
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ofwn_init, /* netif_init */
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ofwn_get, /* netif_get */
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ofwn_put, /* netif_put */
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ofwn_end, /* netif_end */
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ofwn_ifs, /* netif_ifs */
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nitems(ofwn_ifs) /* netif_nifs */
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};
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static ihandle_t netinstance;
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static void *dmabuf;
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static int
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ofwn_match(struct netif *nif, void *machdep_hint)
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{
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return 1;
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}
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static int
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ofwn_probe(struct netif *nif, void *machdep_hint)
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{
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return 0;
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}
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static ssize_t
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ofwn_put(struct iodesc *desc, void *pkt, size_t len)
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{
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size_t sendlen;
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ssize_t rv;
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#if defined(NETIF_DEBUG)
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struct ether_header *eh;
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printf("netif_put: desc=0x%x pkt=0x%x len=%d\n", desc, pkt, len);
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eh = pkt;
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printf("dst: %s ", ether_sprintf(eh->ether_dhost));
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printf("src: %s ", ether_sprintf(eh->ether_shost));
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printf("type: 0x%x\n", eh->ether_type & 0xffff);
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#endif
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sendlen = len;
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if (sendlen < 60) {
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sendlen = 60;
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#if defined(NETIF_DEBUG)
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printf("netif_put: length padded to %d\n", sendlen);
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#endif
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}
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if (dmabuf) {
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bcopy(pkt, dmabuf, sendlen);
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pkt = dmabuf;
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}
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rv = OF_write(netinstance, pkt, len);
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#if defined(NETIF_DEBUG)
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printf("netif_put: OF_write returned %d\n", rv);
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#endif
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return rv;
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}
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static ssize_t
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ofwn_get(struct iodesc *desc, void **pkt, time_t timeout)
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{
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time_t t;
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ssize_t length;
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size_t len;
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char *buf, *ptr;
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#if defined(NETIF_DEBUG)
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printf("netif_get: pkt=%p, timeout=%d\n", pkt, timeout);
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#endif
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/*
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* We should read the "max-frame-size" int property instead,
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* but at this time the iodesc does not have mtu, so we will take
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* a small shortcut here.
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*/
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len = ETHER_MAX_LEN;
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buf = malloc(len + ETHER_ALIGN);
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if (buf == NULL)
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return (-1);
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ptr = buf + ETHER_ALIGN;
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t = getsecs();
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do {
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length = OF_read(netinstance, ptr, len);
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} while ((length == -2 || length == 0) &&
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(getsecs() - t < timeout));
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#if defined(NETIF_DEBUG)
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printf("netif_get: received length=%d (%x)\n", length, length);
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#endif
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if (length < 12) {
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free(buf);
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return (-1);
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}
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#if defined(NETIF_VERBOSE_DEBUG)
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{
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char *ch = ptr;
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int i;
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for(i = 0; i < 96; i += 4) {
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printf("%02x%02x%02x%02x ", ch[i], ch[i+1],
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ch[i+2], ch[i+3]);
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}
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printf("\n");
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}
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#endif
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#if defined(NETIF_DEBUG)
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{
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struct ether_header *eh = ptr;
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printf("dst: %s ", ether_sprintf(eh->ether_dhost));
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printf("src: %s ", ether_sprintf(eh->ether_shost));
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printf("type: 0x%x\n", eh->ether_type & 0xffff);
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}
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#endif
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*pkt = buf;
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return (length);
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}
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extern char *strchr();
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static void
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ofwn_init(struct iodesc *desc, void *machdep_hint)
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{
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phandle_t netdev;
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char path[64];
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char *ch;
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int pathlen;
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pathlen = OF_getprop(chosen, "bootpath", path, 64);
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if ((ch = strchr(path, ':')) != NULL)
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*ch = '\0';
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netdev = OF_finddevice(path);
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#ifdef __sparc64__
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if (OF_getprop(netdev, "mac-address", desc->myea, 6) == -1)
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#else
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if (OF_getprop(netdev, "local-mac-address", desc->myea, 6) == -1)
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#endif
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goto punt;
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printf("boot: ethernet address: %s\n", ether_sprintf(desc->myea));
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if ((netinstance = OF_open(path)) == -1) {
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printf("Could not open network device.\n");
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goto punt;
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}
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#if defined(NETIF_DEBUG)
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printf("ofwn_init: Open Firmware instance handle: %08x\n", netinstance);
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#endif
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#ifndef __sparc64__
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dmabuf = NULL;
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if (OF_call_method("dma-alloc", netinstance, 1, 1, (64 * 1024), &dmabuf)
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< 0) {
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printf("Failed to allocate DMA buffer (got %08x).\n", dmabuf);
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goto punt;
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}
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#if defined(NETIF_DEBUG)
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printf("ofwn_init: allocated DMA buffer: %08x\n", dmabuf);
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#endif
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#endif
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return;
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punt:
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printf("\n");
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printf("Could not boot from %s.\n", path);
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OF_enter();
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}
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static void
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ofwn_end(struct netif *nif)
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{
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#ifdef BROKEN
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/* dma-free freezes at least some Apple ethernet controllers */
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OF_call_method("dma-free", netinstance, 2, 0, dmabuf, MAXPHYS);
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#endif
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OF_close(netinstance);
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}
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#if 0
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int
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ofwn_getunit(const char *path)
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{
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int i;
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char newpath[255];
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OF_canon(path, newpath, 254);
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for (i = 0; i < nofwninfo; i++) {
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printf(">>> test =\t%s\n", ofwninfo[i].ofwn_path);
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if (strcmp(path, ofwninfo[i].ofwn_path) == 0)
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return i;
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if (strcmp(newpath, ofwninfo[i].ofwn_path) == 0)
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return i;
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}
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return -1;
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}
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#endif
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