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_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 }