1 /* 2 * EFI application network access support 3 * 4 * Copyright (c) 2016 Alexander Graf 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <efi_loader.h> 11 #include <inttypes.h> 12 #include <lcd.h> 13 #include <malloc.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_GUID; 18 static const efi_guid_t efi_pxe_guid = EFI_PXE_GUID; 19 static struct efi_pxe_packet *dhcp_ack; 20 static bool new_rx_packet; 21 static void *new_tx_packet; 22 23 struct efi_net_obj { 24 /* Generic EFI object parent class data */ 25 struct efi_object parent; 26 /* EFI Interface callback struct for network */ 27 struct efi_simple_network net; 28 struct efi_simple_network_mode net_mode; 29 /* Device path to the network adapter */ 30 struct efi_device_path_file_path dp[2]; 31 /* PXE struct to transmit dhcp data */ 32 struct efi_pxe pxe; 33 struct efi_pxe_mode pxe_mode; 34 }; 35 36 static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this) 37 { 38 EFI_ENTRY("%p", this); 39 40 return EFI_EXIT(EFI_SUCCESS); 41 } 42 43 static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this) 44 { 45 EFI_ENTRY("%p", this); 46 47 return EFI_EXIT(EFI_SUCCESS); 48 } 49 50 static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this, 51 ulong extra_rx, ulong extra_tx) 52 { 53 EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx); 54 55 eth_init(); 56 57 return EFI_EXIT(EFI_SUCCESS); 58 } 59 60 static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this, 61 int extended_verification) 62 { 63 EFI_ENTRY("%p, %x", this, extended_verification); 64 65 return EFI_EXIT(EFI_SUCCESS); 66 } 67 68 static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this) 69 { 70 EFI_ENTRY("%p", this); 71 72 return EFI_EXIT(EFI_SUCCESS); 73 } 74 75 static efi_status_t EFIAPI efi_net_receive_filters( 76 struct efi_simple_network *this, u32 enable, u32 disable, 77 int reset_mcast_filter, ulong mcast_filter_count, 78 struct efi_mac_address *mcast_filter) 79 { 80 EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable, 81 reset_mcast_filter, mcast_filter_count, mcast_filter); 82 83 /* XXX Do we care? */ 84 85 return EFI_EXIT(EFI_SUCCESS); 86 } 87 88 static efi_status_t EFIAPI efi_net_station_address( 89 struct efi_simple_network *this, int reset, 90 struct efi_mac_address *new_mac) 91 { 92 EFI_ENTRY("%p, %x, %p", this, reset, new_mac); 93 94 return EFI_EXIT(EFI_INVALID_PARAMETER); 95 } 96 97 static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this, 98 int reset, ulong *stat_size, 99 void *stat_table) 100 { 101 EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table); 102 103 return EFI_EXIT(EFI_INVALID_PARAMETER); 104 } 105 106 static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this, 107 int ipv6, 108 struct efi_ip_address *ip, 109 struct efi_mac_address *mac) 110 { 111 EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac); 112 113 return EFI_EXIT(EFI_INVALID_PARAMETER); 114 } 115 116 static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this, 117 int read_write, ulong offset, 118 ulong buffer_size, char *buffer) 119 { 120 EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size, 121 buffer); 122 123 return EFI_EXIT(EFI_INVALID_PARAMETER); 124 } 125 126 static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this, 127 u32 *int_status, void **txbuf) 128 { 129 EFI_ENTRY("%p, %p, %p", this, int_status, txbuf); 130 131 /* We send packets synchronously, so nothing is outstanding */ 132 if (int_status) 133 *int_status = 0; 134 if (txbuf) 135 *txbuf = new_tx_packet; 136 137 new_tx_packet = NULL; 138 139 return EFI_EXIT(EFI_SUCCESS); 140 } 141 142 static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this, 143 ulong header_size, ulong buffer_size, void *buffer, 144 struct efi_mac_address *src_addr, 145 struct efi_mac_address *dest_addr, u16 *protocol) 146 { 147 EFI_ENTRY("%p, %lx, %lx, %p, %p, %p, %p", this, header_size, 148 buffer_size, buffer, src_addr, dest_addr, protocol); 149 150 if (header_size) { 151 /* We would need to create the header if header_size != 0 */ 152 return EFI_EXIT(EFI_INVALID_PARAMETER); 153 } 154 155 net_send_packet(buffer, buffer_size); 156 new_tx_packet = buffer; 157 158 return EFI_EXIT(EFI_SUCCESS); 159 } 160 161 static void efi_net_push(void *pkt, int len) 162 { 163 new_rx_packet = true; 164 } 165 166 static efi_status_t EFIAPI efi_net_receive(struct efi_simple_network *this, 167 ulong *header_size, ulong *buffer_size, void *buffer, 168 struct efi_mac_address *src_addr, 169 struct efi_mac_address *dest_addr, u16 *protocol) 170 { 171 EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size, 172 buffer_size, buffer, src_addr, dest_addr, protocol); 173 174 push_packet = efi_net_push; 175 eth_rx(); 176 push_packet = NULL; 177 178 if (!new_rx_packet) 179 return EFI_EXIT(EFI_NOT_READY); 180 181 if (*buffer_size < net_rx_packet_len) { 182 /* Packet doesn't fit, try again with bigger buf */ 183 *buffer_size = net_rx_packet_len; 184 return EFI_EXIT(EFI_BUFFER_TOO_SMALL); 185 } 186 187 memcpy(buffer, net_rx_packet, net_rx_packet_len); 188 *buffer_size = net_rx_packet_len; 189 new_rx_packet = false; 190 191 return EFI_EXIT(EFI_SUCCESS); 192 } 193 194 static efi_status_t efi_net_open_dp(void *handle, efi_guid_t *protocol, 195 void **protocol_interface, void *agent_handle, 196 void *controller_handle, uint32_t attributes) 197 { 198 struct efi_simple_network *net = handle; 199 struct efi_net_obj *netobj = container_of(net, struct efi_net_obj, net); 200 201 *protocol_interface = netobj->dp; 202 203 return EFI_SUCCESS; 204 } 205 206 static efi_status_t efi_net_open_pxe(void *handle, efi_guid_t *protocol, 207 void **protocol_interface, void *agent_handle, 208 void *controller_handle, uint32_t attributes) 209 { 210 struct efi_simple_network *net = handle; 211 struct efi_net_obj *netobj = container_of(net, struct efi_net_obj, net); 212 213 *protocol_interface = &netobj->pxe; 214 215 return EFI_SUCCESS; 216 } 217 218 void efi_net_set_dhcp_ack(void *pkt, int len) 219 { 220 int maxsize = sizeof(*dhcp_ack); 221 222 if (!dhcp_ack) 223 dhcp_ack = malloc(maxsize); 224 225 memcpy(dhcp_ack, pkt, min(len, maxsize)); 226 } 227 228 /* This gets called from do_bootefi_exec(). */ 229 int efi_net_register(void **handle) 230 { 231 struct efi_net_obj *netobj; 232 struct efi_device_path_file_path dp_net = { 233 .dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE, 234 .dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH, 235 .dp.length = sizeof(dp_net), 236 .str = { 'N', 'e', 't' }, 237 }; 238 struct efi_device_path_file_path dp_end = { 239 .dp.type = DEVICE_PATH_TYPE_END, 240 .dp.sub_type = DEVICE_PATH_SUB_TYPE_END, 241 .dp.length = sizeof(dp_end), 242 }; 243 244 if (!eth_get_dev()) { 245 /* No eth device active, don't expose any */ 246 return 0; 247 } 248 249 /* We only expose the "active" eth device, so one is enough */ 250 netobj = calloc(1, sizeof(*netobj)); 251 252 /* Fill in object data */ 253 netobj->parent.protocols[0].guid = &efi_net_guid; 254 netobj->parent.protocols[0].open = efi_return_handle; 255 netobj->parent.protocols[1].guid = &efi_guid_device_path; 256 netobj->parent.protocols[1].open = efi_net_open_dp; 257 netobj->parent.protocols[2].guid = &efi_pxe_guid; 258 netobj->parent.protocols[2].open = efi_net_open_pxe; 259 netobj->parent.handle = &netobj->net; 260 netobj->net.start = efi_net_start; 261 netobj->net.stop = efi_net_stop; 262 netobj->net.initialize = efi_net_initialize; 263 netobj->net.reset = efi_net_reset; 264 netobj->net.shutdown = efi_net_shutdown; 265 netobj->net.receive_filters = efi_net_receive_filters; 266 netobj->net.station_address = efi_net_station_address; 267 netobj->net.statistics = efi_net_statistics; 268 netobj->net.mcastiptomac = efi_net_mcastiptomac; 269 netobj->net.nvdata = efi_net_nvdata; 270 netobj->net.get_status = efi_net_get_status; 271 netobj->net.transmit = efi_net_transmit; 272 netobj->net.receive = efi_net_receive; 273 netobj->net.mode = &netobj->net_mode; 274 netobj->net_mode.state = EFI_NETWORK_STARTED; 275 netobj->dp[0] = dp_net; 276 netobj->dp[1] = dp_end; 277 memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6); 278 netobj->net_mode.max_packet_size = PKTSIZE; 279 280 netobj->pxe.mode = &netobj->pxe_mode; 281 if (dhcp_ack) 282 netobj->pxe_mode.dhcp_ack = *dhcp_ack; 283 284 /* Hook net up to the device list */ 285 list_add_tail(&netobj->parent.link, &efi_obj_list); 286 287 if (handle) 288 *handle = &netobj->net; 289 290 return 0; 291 } 292