LXR uboot/lib/efi_loader/efi

   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
  15DECLARE_GLOBAL_DATA_PTR;
  16
  17static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_GUID;
  18static const efi_guid_t efi_pxe_guid = EFI_PXE_GUID;
  19static struct efi_pxe_packet *dhcp_ack;
  20static bool new_rx_packet;
  21static void *new_tx_packet;
  22
  23struct 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
  36static 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
  43static 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
  50static 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
  60static 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
  68static 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
  75static 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
  88static 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
  97static 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
 106static 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
 116static 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
 126static 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
 142static 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
 161static void efi_net_push(void *pkt, int len)
 162{
 163        new_rx_packet = true;
 164}
 165
 166static 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
 194static 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
 206static 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
 218void 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(). */
 229int 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}
 292