lib/efi_loader/efi_net.c

   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 }