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_mac_addr dp_mac; 31 struct efi_device_path_file_path dp_end; 32 /* PXE struct to transmit dhcp data */ 33 struct efi_pxe pxe; 34 struct efi_pxe_mode pxe_mode; 35 }; 36 37 static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this) 38 { 39 EFI_ENTRY("%p", this); 40 41 return EFI_EXIT(EFI_SUCCESS); 42 } 43 44 static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this) 45 { 46 EFI_ENTRY("%p", this); 47 48 return EFI_EXIT(EFI_SUCCESS); 49 } 50 51 static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this, 52 ulong extra_rx, ulong extra_tx) 53 { 54 EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx); 55 56 eth_init(); 57 58 return EFI_EXIT(EFI_SUCCESS); 59 } 60 61 static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this, 62 int extended_verification) 63 { 64 EFI_ENTRY("%p, %x", this, extended_verification); 65 66 return EFI_EXIT(EFI_SUCCESS); 67 } 68 69 static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this) 70 { 71 EFI_ENTRY("%p", this); 72 73 return EFI_EXIT(EFI_SUCCESS); 74 } 75 76 static efi_status_t EFIAPI efi_net_receive_filters( 77 struct efi_simple_network *this, u32 enable, u32 disable, 78 int reset_mcast_filter, ulong mcast_filter_count, 79 struct efi_mac_address *mcast_filter) 80 { 81 EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable, 82 reset_mcast_filter, mcast_filter_count, mcast_filter); 83 84 /* XXX Do we care? */ 85 86 return EFI_EXIT(EFI_SUCCESS); 87 } 88 89 static efi_status_t EFIAPI efi_net_station_address( 90 struct efi_simple_network *this, int reset, 91 struct efi_mac_address *new_mac) 92 { 93 EFI_ENTRY("%p, %x, %p", this, reset, new_mac); 94 95 return EFI_EXIT(EFI_INVALID_PARAMETER); 96 } 97 98 static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this, 99 int reset, ulong *stat_size, 100 void *stat_table) 101 { 102 EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table); 103 104 return EFI_EXIT(EFI_INVALID_PARAMETER); 105 } 106 107 static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this, 108 int ipv6, 109 struct efi_ip_address *ip, 110 struct efi_mac_address *mac) 111 { 112 EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac); 113 114 return EFI_EXIT(EFI_INVALID_PARAMETER); 115 } 116 117 static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this, 118 int read_write, ulong offset, 119 ulong buffer_size, char *buffer) 120 { 121 EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size, 122 buffer); 123 124 return EFI_EXIT(EFI_INVALID_PARAMETER); 125 } 126 127 static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this, 128 u32 *int_status, void **txbuf) 129 { 130 EFI_ENTRY("%p, %p, %p", this, int_status, txbuf); 131 132 /* We send packets synchronously, so nothing is outstanding */ 133 if (int_status) 134 *int_status = 0; 135 if (txbuf) 136 *txbuf = new_tx_packet; 137 138 new_tx_packet = NULL; 139 140 return EFI_EXIT(EFI_SUCCESS); 141 } 142 143 static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this, 144 ulong header_size, ulong buffer_size, void *buffer, 145 struct efi_mac_address *src_addr, 146 struct efi_mac_address *dest_addr, u16 *protocol) 147 { 148 EFI_ENTRY("%p, %lx, %lx, %p, %p, %p, %p", this, header_size, 149 buffer_size, buffer, src_addr, dest_addr, protocol); 150 151 if (header_size) { 152 /* We would need to create the header if header_size != 0 */ 153 return EFI_EXIT(EFI_INVALID_PARAMETER); 154 } 155 156 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER 157 /* Ethernet packets always fit, just bounce */ 158 memcpy(efi_bounce_buffer, buffer, buffer_size); 159 net_send_packet(efi_bounce_buffer, buffer_size); 160 #else 161 net_send_packet(buffer, buffer_size); 162 #endif 163 164 new_tx_packet = buffer; 165 166 return EFI_EXIT(EFI_SUCCESS); 167 } 168 169 static void efi_net_push(void *pkt, int len) 170 { 171 new_rx_packet = true; 172 } 173 174 static efi_status_t EFIAPI efi_net_receive(struct efi_simple_network *this, 175 ulong *header_size, ulong *buffer_size, void *buffer, 176 struct efi_mac_address *src_addr, 177 struct efi_mac_address *dest_addr, u16 *protocol) 178 { 179 EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size, 180 buffer_size, buffer, src_addr, dest_addr, protocol); 181 182 push_packet = efi_net_push; 183 eth_rx(); 184 push_packet = NULL; 185 186 if (!new_rx_packet) 187 return EFI_EXIT(EFI_NOT_READY); 188 189 if (*buffer_size < net_rx_packet_len) { 190 /* Packet doesn't fit, try again with bigger buf */ 191 *buffer_size = net_rx_packet_len; 192 return EFI_EXIT(EFI_BUFFER_TOO_SMALL); 193 } 194 195 memcpy(buffer, net_rx_packet, net_rx_packet_len); 196 *buffer_size = net_rx_packet_len; 197 new_rx_packet = false; 198 199 return EFI_EXIT(EFI_SUCCESS); 200 } 201 202 static efi_status_t EFIAPI efi_net_open_dp(void *handle, efi_guid_t *protocol, 203 void **protocol_interface, void *agent_handle, 204 void *controller_handle, uint32_t attributes) 205 { 206 struct efi_simple_network *net = handle; 207 struct efi_net_obj *netobj = container_of(net, struct efi_net_obj, net); 208 209 *protocol_interface = &netobj->dp_mac; 210 211 return EFI_SUCCESS; 212 } 213 214 static efi_status_t EFIAPI efi_net_open_pxe(void *handle, efi_guid_t *protocol, 215 void **protocol_interface, void *agent_handle, 216 void *controller_handle, uint32_t attributes) 217 { 218 struct efi_simple_network *net = handle; 219 struct efi_net_obj *netobj = container_of(net, struct efi_net_obj, net); 220 221 *protocol_interface = &netobj->pxe; 222 223 return EFI_SUCCESS; 224 } 225 226 void efi_net_set_dhcp_ack(void *pkt, int len) 227 { 228 int maxsize = sizeof(*dhcp_ack); 229 230 if (!dhcp_ack) 231 dhcp_ack = malloc(maxsize); 232 233 memcpy(dhcp_ack, pkt, min(len, maxsize)); 234 } 235 236 /* This gets called from do_bootefi_exec(). */ 237 int efi_net_register(void **handle) 238 { 239 struct efi_net_obj *netobj; 240 struct efi_device_path_mac_addr dp_net = { 241 .dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE, 242 .dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR, 243 .dp.length = sizeof(dp_net), 244 }; 245 struct efi_device_path_file_path dp_end = { 246 .dp.type = DEVICE_PATH_TYPE_END, 247 .dp.sub_type = DEVICE_PATH_SUB_TYPE_END, 248 .dp.length = sizeof(dp_end), 249 }; 250 251 if (!eth_get_dev()) { 252 /* No eth device active, don't expose any */ 253 return 0; 254 } 255 256 /* We only expose the "active" eth device, so one is enough */ 257 netobj = calloc(1, sizeof(*netobj)); 258 259 /* Fill in object data */ 260 netobj->parent.protocols[0].guid = &efi_net_guid; 261 netobj->parent.protocols[0].open = efi_return_handle; 262 netobj->parent.protocols[1].guid = &efi_guid_device_path; 263 netobj->parent.protocols[1].open = efi_net_open_dp; 264 netobj->parent.protocols[2].guid = &efi_pxe_guid; 265 netobj->parent.protocols[2].open = efi_net_open_pxe; 266 netobj->parent.handle = &netobj->net; 267 netobj->net.start = efi_net_start; 268 netobj->net.stop = efi_net_stop; 269 netobj->net.initialize = efi_net_initialize; 270 netobj->net.reset = efi_net_reset; 271 netobj->net.shutdown = efi_net_shutdown; 272 netobj->net.receive_filters = efi_net_receive_filters; 273 netobj->net.station_address = efi_net_station_address; 274 netobj->net.statistics = efi_net_statistics; 275 netobj->net.mcastiptomac = efi_net_mcastiptomac; 276 netobj->net.nvdata = efi_net_nvdata; 277 netobj->net.get_status = efi_net_get_status; 278 netobj->net.transmit = efi_net_transmit; 279 netobj->net.receive = efi_net_receive; 280 netobj->net.mode = &netobj->net_mode; 281 netobj->net_mode.state = EFI_NETWORK_STARTED; 282 netobj->dp_mac = dp_net; 283 netobj->dp_end = dp_end; 284 memcpy(netobj->dp_mac.mac.addr, eth_get_ethaddr(), 6); 285 memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6); 286 netobj->net_mode.max_packet_size = PKTSIZE; 287 288 netobj->pxe.mode = &netobj->pxe_mode; 289 if (dhcp_ack) 290 netobj->pxe_mode.dhcp_ack = *dhcp_ack; 291 292 /* Hook net up to the device list */ 293 list_add_tail(&netobj->parent.link, &efi_obj_list); 294 295 if (handle) 296 *handle = &netobj->net; 297 298 return 0; 299 } 300