1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015 National Instruments
*
* (C) Copyright 2015
* Joe Hershberger <joe.hershberger@ni.com>
*/
#include <log.h>
#include <asm/eth-raw-os.h>
#include <common.h>
#include <dm.h>
#include <env.h>
#include <malloc.h>
#include <net.h>
#include <asm/global_data.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_plat(dev);
int ret;
debug("eth_sandbox_raw: Start\n");
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)
{
struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
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, int flags, uchar **packetp)
{
struct eth_pdata *pdata = dev_get_plat(dev);
struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
int retval = 0;
int length;
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];
return length;
}
return retval;
}
static void sb_eth_raw_stop(struct udevice *dev)
{
struct eth_sandbox_raw_priv *priv = dev_get_priv(dev);
debug("eth_sandbox_raw: Stop\n");
sandbox_eth_raw_os_stop(priv);
}
static int sb_eth_raw_read_rom_hwaddr(struct udevice *dev)
{
struct eth_pdata *pdata = dev_get_plat(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_of_to_plat(struct udevice *dev)
{
struct eth_pdata *pdata = dev_get_plat(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) {
strlcpy(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;
return 0;
}
static const struct udevice_id sb_eth_raw_ids[] = {
{ .compatible = "sandbox,eth-raw" },
{ }
};
U_BOOT_DRIVER(eth_sandbox_raw) = {
.name = "eth_sandbox_raw",
.id = UCLASS_ETH,
.of_match = sb_eth_raw_ids,
.of_to_plat = sb_eth_raw_of_to_plat,
.ops = &sb_eth_raw_ops,
.priv_auto = sizeof(struct eth_sandbox_raw_priv),
.plat_auto = sizeof(struct eth_pdata),
};
|