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 void efi_net_set_dhcp_ack(void *pkt, int len) 203 { 204 int maxsize = sizeof(*dhcp_ack); 205 206 if (!dhcp_ack) 207 dhcp_ack = malloc(maxsize); 208 209 memcpy(dhcp_ack, pkt, min(len, maxsize)); 210 } 211 212 /* This gets called from do_bootefi_exec(). */ 213 int efi_net_register(void **handle) 214 { 215 struct efi_net_obj *netobj; 216 struct efi_device_path_mac_addr dp_net = { 217 .dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE, 218 .dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR, 219 .dp.length = sizeof(dp_net), 220 }; 221 struct efi_device_path_file_path dp_end = { 222 .dp.type = DEVICE_PATH_TYPE_END, 223 .dp.sub_type = DEVICE_PATH_SUB_TYPE_END, 224 .dp.length = sizeof(dp_end), 225 }; 226 227 if (!eth_get_dev()) { 228 /* No eth device active, don't expose any */ 229 return 0; 230 } 231 232 /* We only expose the "active" eth device, so one is enough */ 233 netobj = calloc(1, sizeof(*netobj)); 234 235 /* Fill in object data */ 236 netobj->parent.protocols[0].guid = &efi_net_guid; 237 netobj->parent.protocols[0].protocol_interface = &netobj->net; 238 netobj->parent.protocols[1].guid = &efi_guid_device_path; 239 netobj->parent.protocols[1].protocol_interface = &netobj->dp_mac; 240 netobj->parent.protocols[2].guid = &efi_pxe_guid; 241 netobj->parent.protocols[2].protocol_interface = &netobj->pxe; 242 netobj->parent.handle = &netobj->net; 243 netobj->net.start = efi_net_start; 244 netobj->net.stop = efi_net_stop; 245 netobj->net.initialize = efi_net_initialize; 246 netobj->net.reset = efi_net_reset; 247 netobj->net.shutdown = efi_net_shutdown; 248 netobj->net.receive_filters = efi_net_receive_filters; 249 netobj->net.station_address = efi_net_station_address; 250 netobj->net.statistics = efi_net_statistics; 251 netobj->net.mcastiptomac = efi_net_mcastiptomac; 252 netobj->net.nvdata = efi_net_nvdata; 253 netobj->net.get_status = efi_net_get_status; 254 netobj->net.transmit = efi_net_transmit; 255 netobj->net.receive = efi_net_receive; 256 netobj->net.mode = &netobj->net_mode; 257 netobj->net_mode.state = EFI_NETWORK_STARTED; 258 netobj->dp_mac = dp_net; 259 netobj->dp_end = dp_end; 260 memcpy(netobj->dp_mac.mac.addr, eth_get_ethaddr(), 6); 261 memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6); 262 netobj->net_mode.max_packet_size = PKTSIZE; 263 264 netobj->pxe.mode = &netobj->pxe_mode; 265 if (dhcp_ack) 266 netobj->pxe_mode.dhcp_ack = *dhcp_ack; 267 268 /* Hook net up to the device list */ 269 list_add_tail(&netobj->parent.link, &efi_obj_list); 270 271 if (handle) 272 *handle = &netobj->net; 273 274 return 0; 275 } 276