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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
165 lines
4.3 KiB
C
165 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2015 National Instruments
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*
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* (C) Copyright 2015
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* Joe Hershberger <joe.hershberger@ni.com>
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*/
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#include <asm/eth-raw-os.h>
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#include <common.h>
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#include <dm.h>
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#include <malloc.h>
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#include <net.h>
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DECLARE_GLOBAL_DATA_PTR;
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static int reply_arp;
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static struct in_addr arp_ip;
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static int sb_eth_raw_start(struct udevice *dev)
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{
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struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
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struct eth_pdata *pdata = dev_get_platdata(dev);
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const char *interface;
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debug("eth_sandbox_raw: Start\n");
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interface = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
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"host-raw-interface", NULL);
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if (interface == NULL)
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return -EINVAL;
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if (strcmp(interface, "lo") == 0) {
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priv->local = 1;
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env_set("ipaddr", "127.0.0.1");
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env_set("serverip", "127.0.0.1");
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}
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return sandbox_eth_raw_os_start(interface, pdata->enetaddr, priv);
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}
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static int sb_eth_raw_send(struct udevice *dev, void *packet, int length)
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{
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struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
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debug("eth_sandbox_raw: Send packet %d\n", length);
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if (priv->local) {
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struct ethernet_hdr *eth = packet;
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if (ntohs(eth->et_protlen) == PROT_ARP) {
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struct arp_hdr *arp = packet + ETHER_HDR_SIZE;
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/**
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* localhost works on a higher-level API in Linux than
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* ARP packets, so fake it
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*/
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arp_ip = net_read_ip(&arp->ar_tpa);
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reply_arp = 1;
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return 0;
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}
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packet += ETHER_HDR_SIZE;
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length -= ETHER_HDR_SIZE;
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}
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return sandbox_eth_raw_os_send(packet, length, priv);
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}
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static int sb_eth_raw_recv(struct udevice *dev, int flags, uchar **packetp)
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{
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struct eth_pdata *pdata = dev_get_platdata(dev);
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struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
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int retval = 0;
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int length;
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if (reply_arp) {
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struct arp_hdr *arp = (void *)net_rx_packets[0] +
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ETHER_HDR_SIZE;
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/*
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* Fake an ARP response. The u-boot network stack is sending an
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* ARP request (to find the MAC address to address the actual
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* packet to) and requires an ARP response to continue. Since
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* this is the localhost interface, there is no Etherent level
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* traffic at all, so there is no way to send an ARP request or
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* to get a response. For this reason we fake the response to
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* make the u-boot network stack happy.
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*/
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arp->ar_hrd = htons(ARP_ETHER);
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arp->ar_pro = htons(PROT_IP);
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arp->ar_hln = ARP_HLEN;
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arp->ar_pln = ARP_PLEN;
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arp->ar_op = htons(ARPOP_REPLY);
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/* Any non-zero MAC address will work */
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memset(&arp->ar_sha, 0x01, ARP_HLEN);
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/* Use whatever IP we were looking for (always 127.0.0.1?) */
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net_write_ip(&arp->ar_spa, arp_ip);
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memcpy(&arp->ar_tha, pdata->enetaddr, ARP_HLEN);
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net_write_ip(&arp->ar_tpa, net_ip);
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length = ARP_HDR_SIZE;
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} else {
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/* If local, the Ethernet header won't be included; skip it */
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uchar *pktptr = priv->local ?
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net_rx_packets[0] + ETHER_HDR_SIZE : net_rx_packets[0];
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retval = sandbox_eth_raw_os_recv(pktptr, &length, priv);
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}
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if (!retval && length) {
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if (priv->local) {
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struct ethernet_hdr *eth = (void *)net_rx_packets[0];
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/* Fill in enough of the missing Ethernet header */
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memcpy(eth->et_dest, pdata->enetaddr, ARP_HLEN);
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memset(eth->et_src, 0x01, ARP_HLEN);
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eth->et_protlen = htons(reply_arp ? PROT_ARP : PROT_IP);
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reply_arp = 0;
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length += ETHER_HDR_SIZE;
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}
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debug("eth_sandbox_raw: received packet %d\n",
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length);
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*packetp = net_rx_packets[0];
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return length;
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}
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return retval;
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}
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static void sb_eth_raw_stop(struct udevice *dev)
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{
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struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
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debug("eth_sandbox_raw: Stop\n");
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sandbox_eth_raw_os_stop(priv);
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}
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static const struct eth_ops sb_eth_raw_ops = {
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.start = sb_eth_raw_start,
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.send = sb_eth_raw_send,
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.recv = sb_eth_raw_recv,
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.stop = sb_eth_raw_stop,
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};
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static int sb_eth_raw_ofdata_to_platdata(struct udevice *dev)
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{
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struct eth_pdata *pdata = dev_get_platdata(dev);
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pdata->iobase = devfdt_get_addr(dev);
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return 0;
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}
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static const struct udevice_id sb_eth_raw_ids[] = {
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{ .compatible = "sandbox,eth-raw" },
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{ }
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};
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U_BOOT_DRIVER(eth_sandbox_raw) = {
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.name = "eth_sandbox_raw",
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.id = UCLASS_ETH,
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.of_match = sb_eth_raw_ids,
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.ofdata_to_platdata = sb_eth_raw_ofdata_to_platdata,
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.ops = &sb_eth_raw_ops,
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.priv_auto_alloc_size = sizeof(struct eth_sandbox_raw_priv),
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.platdata_auto_alloc_size = sizeof(struct eth_pdata),
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};
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