+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015 National Instruments
*
* (C) Copyright 2015
* Joe Hershberger <joe.hershberger@ni.com>
- *
- * SPDX-License-Identifier: GPL-2.0
*/
#include <asm/eth-raw-os.h>
#include <common.h>
#include <dm.h>
+#include <env.h>
#include <malloc.h>
#include <net.h>
DECLARE_GLOBAL_DATA_PTR;
+static int reply_arp;
+static struct in_addr arp_ip;
static int sb_eth_raw_start(struct udevice *dev)
{
struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
struct eth_pdata *pdata = dev_get_platdata(dev);
- const char *interface;
+ int ret;
debug("eth_sandbox_raw: Start\n");
- interface = fdt_getprop(gd->fdt_blob, dev->of_offset,
- "host-raw-interface", NULL);
- if (interface == NULL)
- return -EINVAL;
-
- return sandbox_eth_raw_os_start(interface, pdata->enetaddr, priv);
+ ret = sandbox_eth_raw_os_start(priv, pdata->enetaddr);
+ if (priv->local) {
+ env_set("ipaddr", "127.0.0.1");
+ env_set("serverip", "127.0.0.1");
+ net_ip = string_to_ip("127.0.0.1");
+ net_server_ip = net_ip;
+ }
+ return ret;
}
static int sb_eth_raw_send(struct udevice *dev, void *packet, int length)
debug("eth_sandbox_raw: Send packet %d\n", length);
+ if (priv->local) {
+ struct ethernet_hdr *eth = packet;
+
+ if (ntohs(eth->et_protlen) == PROT_ARP) {
+ struct arp_hdr *arp = packet + ETHER_HDR_SIZE;
+
+ /**
+ * localhost works on a higher-level API in Linux than
+ * ARP packets, so fake it
+ */
+ arp_ip = net_read_ip(&arp->ar_tpa);
+ reply_arp = 1;
+ return 0;
+ }
+ packet += ETHER_HDR_SIZE;
+ length -= ETHER_HDR_SIZE;
+ }
return sandbox_eth_raw_os_send(packet, length, priv);
}
-static int sb_eth_raw_recv(struct udevice *dev, uchar **packetp)
+static int sb_eth_raw_recv(struct udevice *dev, int flags, uchar **packetp)
{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
- int retval;
+ int retval = 0;
int length;
- retval = sandbox_eth_raw_os_recv(net_rx_packets[0], &length, priv);
+ if (reply_arp) {
+ struct arp_hdr *arp = (void *)net_rx_packets[0] +
+ ETHER_HDR_SIZE;
+
+ /*
+ * Fake an ARP response. The u-boot network stack is sending an
+ * ARP request (to find the MAC address to address the actual
+ * packet to) and requires an ARP response to continue. Since
+ * this is the localhost interface, there is no Etherent level
+ * traffic at all, so there is no way to send an ARP request or
+ * to get a response. For this reason we fake the response to
+ * make the u-boot network stack happy.
+ */
+ arp->ar_hrd = htons(ARP_ETHER);
+ arp->ar_pro = htons(PROT_IP);
+ arp->ar_hln = ARP_HLEN;
+ arp->ar_pln = ARP_PLEN;
+ arp->ar_op = htons(ARPOP_REPLY);
+ /* Any non-zero MAC address will work */
+ memset(&arp->ar_sha, 0x01, ARP_HLEN);
+ /* Use whatever IP we were looking for (always 127.0.0.1?) */
+ net_write_ip(&arp->ar_spa, arp_ip);
+ memcpy(&arp->ar_tha, pdata->enetaddr, ARP_HLEN);
+ net_write_ip(&arp->ar_tpa, net_ip);
+ length = ARP_HDR_SIZE;
+ } else {
+ /* If local, the Ethernet header won't be included; skip it */
+ uchar *pktptr = priv->local ?
+ net_rx_packets[0] + ETHER_HDR_SIZE : net_rx_packets[0];
+
+ retval = sandbox_eth_raw_os_recv(pktptr, &length, priv);
+ }
if (!retval && length) {
+ if (priv->local) {
+ struct ethernet_hdr *eth = (void *)net_rx_packets[0];
+
+ /* Fill in enough of the missing Ethernet header */
+ memcpy(eth->et_dest, pdata->enetaddr, ARP_HLEN);
+ memset(eth->et_src, 0x01, ARP_HLEN);
+ eth->et_protlen = htons(reply_arp ? PROT_ARP : PROT_IP);
+ reply_arp = 0;
+ length += ETHER_HDR_SIZE;
+ }
+
debug("eth_sandbox_raw: received packet %d\n",
length);
*packetp = net_rx_packets[0];
sandbox_eth_raw_os_stop(priv);
}
+static int sb_eth_raw_read_rom_hwaddr(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+
+ net_random_ethaddr(pdata->enetaddr);
+
+ return 0;
+}
+
static const struct eth_ops sb_eth_raw_ops = {
.start = sb_eth_raw_start,
.send = sb_eth_raw_send,
.recv = sb_eth_raw_recv,
.stop = sb_eth_raw_stop,
+ .read_rom_hwaddr = sb_eth_raw_read_rom_hwaddr,
};
static int sb_eth_raw_ofdata_to_platdata(struct udevice *dev)
{
struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
+ const char *ifname;
+ int ret;
+
+ pdata->iobase = dev_read_addr(dev);
+
+ ifname = dev_read_string(dev, "host-raw-interface");
+ if (ifname) {
+ strncpy(priv->host_ifname, ifname, IFNAMSIZ);
+ printf(": Using %s from DT\n", priv->host_ifname);
+ }
+ if (dev_read_u32(dev, "host-raw-interface-idx",
+ &priv->host_ifindex) < 0) {
+ priv->host_ifindex = 0;
+ } else {
+ ret = sandbox_eth_raw_os_idx_to_name(priv);
+ if (ret < 0)
+ return ret;
+ printf(": Using interface index %d from DT (%s)\n",
+ priv->host_ifindex, priv->host_ifname);
+ }
+
+ ret = sandbox_eth_raw_os_is_local(priv->host_ifname);
+ if (ret < 0)
+ return ret;
+ priv->local = ret;
- pdata->iobase = dev_get_addr(dev);
return 0;
}
projects / oweals / u-boot.git / blobdiff