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 /* PXE struct to transmit dhcp data */ 30 struct efi_pxe pxe; 31 struct efi_pxe_mode pxe_mode; 32 }; 33 34 static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this) 35 { 36 EFI_ENTRY("%p", this); 37 38 return EFI_EXIT(EFI_SUCCESS); 39 } 40 41 static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this) 42 { 43 EFI_ENTRY("%p", this); 44 45 return EFI_EXIT(EFI_SUCCESS); 46 } 47 48 static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this, 49 ulong extra_rx, ulong extra_tx) 50 { 51 EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx); 52 53 eth_init(); 54 55 return EFI_EXIT(EFI_SUCCESS); 56 } 57 58 static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this, 59 int extended_verification) 60 { 61 EFI_ENTRY("%p, %x", this, extended_verification); 62 63 return EFI_EXIT(EFI_SUCCESS); 64 } 65 66 static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this) 67 { 68 EFI_ENTRY("%p", this); 69 70 return EFI_EXIT(EFI_SUCCESS); 71 } 72 73 static efi_status_t EFIAPI efi_net_receive_filters( 74 struct efi_simple_network *this, u32 enable, u32 disable, 75 int reset_mcast_filter, ulong mcast_filter_count, 76 struct efi_mac_address *mcast_filter) 77 { 78 EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable, 79 reset_mcast_filter, mcast_filter_count, mcast_filter); 80 81 /* XXX Do we care? */ 82 83 return EFI_EXIT(EFI_SUCCESS); 84 } 85 86 static efi_status_t EFIAPI efi_net_station_address( 87 struct efi_simple_network *this, int reset, 88 struct efi_mac_address *new_mac) 89 { 90 EFI_ENTRY("%p, %x, %p", this, reset, new_mac); 91 92 return EFI_EXIT(EFI_INVALID_PARAMETER); 93 } 94 95 static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this, 96 int reset, ulong *stat_size, 97 void *stat_table) 98 { 99 EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table); 100 101 return EFI_EXIT(EFI_INVALID_PARAMETER); 102 } 103 104 static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this, 105 int ipv6, 106 struct efi_ip_address *ip, 107 struct efi_mac_address *mac) 108 { 109 EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac); 110 111 return EFI_EXIT(EFI_INVALID_PARAMETER); 112 } 113 114 static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this, 115 int read_write, ulong offset, 116 ulong buffer_size, char *buffer) 117 { 118 EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size, 119 buffer); 120 121 return EFI_EXIT(EFI_INVALID_PARAMETER); 122 } 123 124 static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this, 125 u32 *int_status, void **txbuf) 126 { 127 EFI_ENTRY("%p, %p, %p", this, int_status, txbuf); 128 129 /* We send packets synchronously, so nothing is outstanding */ 130 if (int_status) 131 *int_status = 0; 132 if (txbuf) 133 *txbuf = new_tx_packet; 134 135 new_tx_packet = NULL; 136 137 return EFI_EXIT(EFI_SUCCESS); 138 } 139 140 static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this, 141 ulong header_size, ulong buffer_size, void *buffer, 142 struct efi_mac_address *src_addr, 143 struct efi_mac_address *dest_addr, u16 *protocol) 144 { 145 EFI_ENTRY("%p, %lx, %lx, %p, %p, %p, %p", this, header_size, 146 buffer_size, buffer, src_addr, dest_addr, protocol); 147 148 if (header_size) { 149 /* We would need to create the header if header_size != 0 */ 150 return EFI_EXIT(EFI_INVALID_PARAMETER); 151 } 152 153 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER 154 /* Ethernet packets always fit, just bounce */ 155 memcpy(efi_bounce_buffer, buffer, buffer_size); 156 net_send_packet(efi_bounce_buffer, buffer_size); 157 #else 158 net_send_packet(buffer, buffer_size); 159 #endif 160 161 new_tx_packet = buffer; 162 163 return EFI_EXIT(EFI_SUCCESS); 164 } 165 166 static void efi_net_push(void *pkt, int len) 167 { 168 new_rx_packet = true; 169 } 170 171 static efi_status_t EFIAPI efi_net_receive(struct efi_simple_network *this, 172 ulong *header_size, ulong *buffer_size, void *buffer, 173 struct efi_mac_address *src_addr, 174 struct efi_mac_address *dest_addr, u16 *protocol) 175 { 176 EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size, 177 buffer_size, buffer, src_addr, dest_addr, protocol); 178 179 push_packet = efi_net_push; 180 eth_rx(); 181 push_packet = NULL; 182 183 if (!new_rx_packet) 184 return EFI_EXIT(EFI_NOT_READY); 185 186 if (*buffer_size < net_rx_packet_len) { 187 /* Packet doesn't fit, try again with bigger buf */ 188 *buffer_size = net_rx_packet_len; 189 return EFI_EXIT(EFI_BUFFER_TOO_SMALL); 190 } 191 192 memcpy(buffer, net_rx_packet, net_rx_packet_len); 193 *buffer_size = net_rx_packet_len; 194 new_rx_packet = false; 195 196 return EFI_EXIT(EFI_SUCCESS); 197 } 198 199 void efi_net_set_dhcp_ack(void *pkt, int len) 200 { 201 int maxsize = sizeof(*dhcp_ack); 202 203 if (!dhcp_ack) 204 dhcp_ack = malloc(maxsize); 205 206 memcpy(dhcp_ack, pkt, min(len, maxsize)); 207 } 208 209 /* This gets called from do_bootefi_exec(). */ 210 int efi_net_register(void) 211 { 212 struct efi_net_obj *netobj; 213 214 if (!eth_get_dev()) { 215 /* No eth device active, don't expose any */ 216 return 0; 217 } 218 219 /* We only expose the "active" eth device, so one is enough */ 220 netobj = calloc(1, sizeof(*netobj)); 221 222 /* Fill in object data */ 223 netobj->parent.protocols[0].guid = &efi_net_guid; 224 netobj->parent.protocols[0].protocol_interface = &netobj->net; 225 netobj->parent.protocols[1].guid = &efi_guid_device_path; 226 netobj->parent.protocols[1].protocol_interface = 227 efi_dp_from_eth(); 228 netobj->parent.protocols[2].guid = &efi_pxe_guid; 229 netobj->parent.protocols[2].protocol_interface = &netobj->pxe; 230 netobj->parent.handle = &netobj->net; 231 netobj->net.start = efi_net_start; 232 netobj->net.stop = efi_net_stop; 233 netobj->net.initialize = efi_net_initialize; 234 netobj->net.reset = efi_net_reset; 235 netobj->net.shutdown = efi_net_shutdown; 236 netobj->net.receive_filters = efi_net_receive_filters; 237 netobj->net.station_address = efi_net_station_address; 238 netobj->net.statistics = efi_net_statistics; 239 netobj->net.mcastiptomac = efi_net_mcastiptomac; 240 netobj->net.nvdata = efi_net_nvdata; 241 netobj->net.get_status = efi_net_get_status; 242 netobj->net.transmit = efi_net_transmit; 243 netobj->net.receive = efi_net_receive; 244 netobj->net.mode = &netobj->net_mode; 245 netobj->net_mode.state = EFI_NETWORK_STARTED; 246 memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6); 247 netobj->net_mode.max_packet_size = PKTSIZE; 248 249 netobj->pxe.mode = &netobj->pxe_mode; 250 if (dhcp_ack) 251 netobj->pxe_mode.dhcp_ack = *dhcp_ack; 252 253 /* Hook net up to the device list */ 254 list_add_tail(&netobj->parent.link, &efi_obj_list); 255 256 return 0; 257 } 258