summaryrefslogtreecommitdiff
path: root/lib/efi_loader/efi_net.c
blob: 0b949d86e8d5386dfa14c51dd30806994a40d51b (plain)
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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
/*
 *  EFI application network access support
 *
 *  Copyright (c) 2016 Alexander Graf
 *
 *  SPDX-License-Identifier:     GPL-2.0+
 */

#include <common.h>
#include <efi_loader.h>
#include <inttypes.h>
#include <lcd.h>
#include <malloc.h>

DECLARE_GLOBAL_DATA_PTR;

static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_GUID;
static const efi_guid_t efi_pxe_guid = EFI_PXE_GUID;
static struct efi_pxe_packet *dhcp_ack;
static bool new_rx_packet;
static void *new_tx_packet;

struct efi_net_obj {
	/* Generic EFI object parent class data */
	struct efi_object parent;
	/* EFI Interface callback struct for network */
	struct efi_simple_network net;
	struct efi_simple_network_mode net_mode;
	/* Device path to the network adapter */
	struct efi_device_path_mac_addr dp_mac;
	struct efi_device_path_file_path dp_end;
	/* PXE struct to transmit dhcp data */
	struct efi_pxe pxe;
	struct efi_pxe_mode pxe_mode;
};

static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this)
{
	EFI_ENTRY("%p", this);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this)
{
	EFI_ENTRY("%p", this);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this,
					      ulong extra_rx, ulong extra_tx)
{
	EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx);

	eth_init();

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this,
					 int extended_verification)
{
	EFI_ENTRY("%p, %x", this, extended_verification);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this)
{
	EFI_ENTRY("%p", this);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_receive_filters(
		struct efi_simple_network *this, u32 enable, u32 disable,
		int reset_mcast_filter, ulong mcast_filter_count,
		struct efi_mac_address *mcast_filter)
{
	EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable,
		  reset_mcast_filter, mcast_filter_count, mcast_filter);

	/* XXX Do we care? */

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_station_address(
		struct efi_simple_network *this, int reset,
		struct efi_mac_address *new_mac)
{
	EFI_ENTRY("%p, %x, %p", this, reset, new_mac);

	return EFI_EXIT(EFI_INVALID_PARAMETER);
}

static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this,
					      int reset, ulong *stat_size,
					      void *stat_table)
{
	EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table);

	return EFI_EXIT(EFI_INVALID_PARAMETER);
}

static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this,
						int ipv6,
						struct efi_ip_address *ip,
						struct efi_mac_address *mac)
{
	EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac);

	return EFI_EXIT(EFI_INVALID_PARAMETER);
}

static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this,
					  int read_write, ulong offset,
					  ulong buffer_size, char *buffer)
{
	EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size,
		  buffer);

	return EFI_EXIT(EFI_INVALID_PARAMETER);
}

static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this,
					      u32 *int_status, void **txbuf)
{
	EFI_ENTRY("%p, %p, %p", this, int_status, txbuf);

	/* We send packets synchronously, so nothing is outstanding */
	if (int_status)
		*int_status = 0;
	if (txbuf)
		*txbuf = new_tx_packet;

	new_tx_packet = NULL;

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this,
		ulong header_size, ulong buffer_size, void *buffer,
		struct efi_mac_address *src_addr,
		struct efi_mac_address *dest_addr, u16 *protocol)
{
	EFI_ENTRY("%p, %lx, %lx, %p, %p, %p, %p", this, header_size,
		  buffer_size, buffer, src_addr, dest_addr, protocol);

	if (header_size) {
		/* We would need to create the header if header_size != 0 */
		return EFI_EXIT(EFI_INVALID_PARAMETER);
	}

#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	/* Ethernet packets always fit, just bounce */
	memcpy(efi_bounce_buffer, buffer, buffer_size);
	net_send_packet(efi_bounce_buffer, buffer_size);
#else
	net_send_packet(buffer, buffer_size);
#endif

	new_tx_packet = buffer;

	return EFI_EXIT(EFI_SUCCESS);
}

static void efi_net_push(void *pkt, int len)
{
	new_rx_packet = true;
}

static efi_status_t EFIAPI efi_net_receive(struct efi_simple_network *this,
		ulong *header_size, ulong *buffer_size, void *buffer,
		struct efi_mac_address *src_addr,
		struct efi_mac_address *dest_addr, u16 *protocol)
{
	EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size,
		  buffer_size, buffer, src_addr, dest_addr, protocol);

	push_packet = efi_net_push;
	eth_rx();
	push_packet = NULL;

	if (!new_rx_packet)
		return EFI_EXIT(EFI_NOT_READY);

	if (*buffer_size < net_rx_packet_len) {
		/* Packet doesn't fit, try again with bigger buf */
		*buffer_size = net_rx_packet_len;
		return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
	}

	memcpy(buffer, net_rx_packet, net_rx_packet_len);
	*buffer_size = net_rx_packet_len;
	new_rx_packet = false;

	return EFI_EXIT(EFI_SUCCESS);
}

void efi_net_set_dhcp_ack(void *pkt, int len)
{
	int maxsize = sizeof(*dhcp_ack);

	if (!dhcp_ack)
		dhcp_ack = malloc(maxsize);

	memcpy(dhcp_ack, pkt, min(len, maxsize));
}

/* This gets called from do_bootefi_exec(). */
int efi_net_register(void **handle)
{
	struct efi_net_obj *netobj;
	struct efi_device_path_mac_addr dp_net = {
		.dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE,
		.dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR,
		.dp.length = sizeof(dp_net),
	};
	struct efi_device_path_file_path dp_end = {
		.dp.type = DEVICE_PATH_TYPE_END,
		.dp.sub_type = DEVICE_PATH_SUB_TYPE_END,
		.dp.length = sizeof(dp_end),
	};

	if (!eth_get_dev()) {
		/* No eth device active, don't expose any */
		return 0;
	}

	/* We only expose the "active" eth device, so one is enough */
	netobj = calloc(1, sizeof(*netobj));

	/* Fill in object data */
	netobj->parent.protocols[0].guid = &efi_net_guid;
	netobj->parent.protocols[0].protocol_interface = &netobj->net;
	netobj->parent.protocols[1].guid = &efi_guid_device_path;
	netobj->parent.protocols[1].protocol_interface = &netobj->dp_mac;
	netobj->parent.protocols[2].guid = &efi_pxe_guid;
	netobj->parent.protocols[2].protocol_interface = &netobj->pxe;
	netobj->parent.handle = &netobj->net;
	netobj->net.start = efi_net_start;
	netobj->net.stop = efi_net_stop;
	netobj->net.initialize = efi_net_initialize;
	netobj->net.reset = efi_net_reset;
	netobj->net.shutdown = efi_net_shutdown;
	netobj->net.receive_filters = efi_net_receive_filters;
	netobj->net.station_address = efi_net_station_address;
	netobj->net.statistics = efi_net_statistics;
	netobj->net.mcastiptomac = efi_net_mcastiptomac;
	netobj->net.nvdata = efi_net_nvdata;
	netobj->net.get_status = efi_net_get_status;
	netobj->net.transmit = efi_net_transmit;
	netobj->net.receive = efi_net_receive;
	netobj->net.mode = &netobj->net_mode;
	netobj->net_mode.state = EFI_NETWORK_STARTED;
	netobj->dp_mac = dp_net;
	netobj->dp_end = dp_end;
	memcpy(netobj->dp_mac.mac.addr, eth_get_ethaddr(), 6);
	memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6);
	netobj->net_mode.max_packet_size = PKTSIZE;

	netobj->pxe.mode = &netobj->pxe_mode;
	if (dhcp_ack)
		netobj->pxe_mode.dhcp_ack = *dhcp_ack;

	/* Hook net up to the device list */
	list_add_tail(&netobj->parent.link, &efi_obj_list);

	if (handle)
		*handle = &netobj->net;

	return 0;
}