We can now successfully boot EFI applications from disk, but users may want to also run them from a PXE setup. This patch implements rudimentary network support, allowing a payload to send and receive network packets. With this patch, I was able to successfully run grub2 with network access inside of QEMU's -M xlnx-ep108. Signed-off-by: Alexander Graf <agraf@suse.de>master
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/*
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* EFI application network access support |
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* |
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* Copyright (c) 2016 Alexander Graf |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <efi_loader.h> |
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#include <inttypes.h> |
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#include <lcd.h> |
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#include <malloc.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_GUID; |
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static const efi_guid_t efi_pxe_guid = EFI_PXE_GUID; |
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static struct efi_pxe_packet *dhcp_ack; |
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static bool new_rx_packet; |
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static void *new_tx_packet; |
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struct efi_net_obj { |
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/* Generic EFI object parent class data */ |
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struct efi_object parent; |
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/* EFI Interface callback struct for network */ |
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struct efi_simple_network net; |
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struct efi_simple_network_mode net_mode; |
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/* Device path to the network adapter */ |
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struct efi_device_path_file_path dp[2]; |
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/* PXE struct to transmit dhcp data */ |
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struct efi_pxe pxe; |
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struct efi_pxe_mode pxe_mode; |
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}; |
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static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this) |
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{ |
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EFI_ENTRY("%p", this); |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this) |
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{ |
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EFI_ENTRY("%p", this); |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this, |
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ulong extra_rx, ulong extra_tx) |
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{ |
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EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx); |
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eth_init(); |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this, |
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int extended_verification) |
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{ |
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EFI_ENTRY("%p, %x", this, extended_verification); |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this) |
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{ |
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EFI_ENTRY("%p", this); |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_receive_filters( |
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struct efi_simple_network *this, u32 enable, u32 disable, |
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int reset_mcast_filter, ulong mcast_filter_count, |
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struct efi_mac_address *mcast_filter) |
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{ |
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EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable, |
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reset_mcast_filter, mcast_filter_count, mcast_filter); |
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/* XXX Do we care? */ |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_station_address( |
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struct efi_simple_network *this, int reset, |
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struct efi_mac_address *new_mac) |
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{ |
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EFI_ENTRY("%p, %x, %p", this, reset, new_mac); |
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return EFI_EXIT(EFI_INVALID_PARAMETER); |
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} |
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static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this, |
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int reset, ulong *stat_size, |
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void *stat_table) |
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{ |
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EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table); |
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return EFI_EXIT(EFI_INVALID_PARAMETER); |
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} |
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static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this, |
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int ipv6, |
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struct efi_ip_address *ip, |
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struct efi_mac_address *mac) |
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{ |
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EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac); |
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return EFI_EXIT(EFI_INVALID_PARAMETER); |
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} |
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static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this, |
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int read_write, ulong offset, |
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ulong buffer_size, char *buffer) |
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{ |
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EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size, |
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buffer); |
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return EFI_EXIT(EFI_INVALID_PARAMETER); |
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} |
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static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this, |
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u32 *int_status, void **txbuf) |
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{ |
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EFI_ENTRY("%p, %p, %p", this, int_status, txbuf); |
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/* We send packets synchronously, so nothing is outstanding */ |
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if (int_status) |
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*int_status = 0; |
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if (txbuf) |
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*txbuf = new_tx_packet; |
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new_tx_packet = NULL; |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this, |
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ulong header_size, ulong buffer_size, void *buffer, |
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struct efi_mac_address *src_addr, |
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struct efi_mac_address *dest_addr, u16 *protocol) |
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{ |
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EFI_ENTRY("%p, %lx, %lx, %p, %p, %p, %p", this, header_size, |
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buffer_size, buffer, src_addr, dest_addr, protocol); |
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if (header_size) { |
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/* We would need to create the header if header_size != 0 */ |
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return EFI_EXIT(EFI_INVALID_PARAMETER); |
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} |
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net_send_packet(buffer, buffer_size); |
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new_tx_packet = buffer; |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static void efi_net_push(void *pkt, int len) |
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{ |
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new_rx_packet = true; |
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} |
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static efi_status_t EFIAPI efi_net_receive(struct efi_simple_network *this, |
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ulong *header_size, ulong *buffer_size, void *buffer, |
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struct efi_mac_address *src_addr, |
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struct efi_mac_address *dest_addr, u16 *protocol) |
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{ |
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EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size, |
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buffer_size, buffer, src_addr, dest_addr, protocol); |
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push_packet = efi_net_push; |
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eth_rx(); |
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push_packet = NULL; |
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if (!new_rx_packet) |
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return EFI_EXIT(EFI_NOT_READY); |
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if (*buffer_size < net_rx_packet_len) { |
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/* Packet doesn't fit, try again with bigger buf */ |
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*buffer_size = net_rx_packet_len; |
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return EFI_EXIT(EFI_BUFFER_TOO_SMALL); |
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} |
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memcpy(buffer, net_rx_packet, net_rx_packet_len); |
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*buffer_size = net_rx_packet_len; |
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new_rx_packet = false; |
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return EFI_EXIT(EFI_SUCCESS); |
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} |
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static efi_status_t efi_net_open_dp(void *handle, efi_guid_t *protocol, |
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void **protocol_interface, void *agent_handle, |
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void *controller_handle, uint32_t attributes) |
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{ |
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struct efi_simple_network *net = handle; |
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struct efi_net_obj *netobj = container_of(net, struct efi_net_obj, net); |
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*protocol_interface = netobj->dp; |
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return EFI_SUCCESS; |
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} |
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static efi_status_t efi_net_open_pxe(void *handle, efi_guid_t *protocol, |
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void **protocol_interface, void *agent_handle, |
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void *controller_handle, uint32_t attributes) |
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{ |
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struct efi_simple_network *net = handle; |
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struct efi_net_obj *netobj = container_of(net, struct efi_net_obj, net); |
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*protocol_interface = &netobj->pxe; |
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return EFI_SUCCESS; |
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} |
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void efi_net_set_dhcp_ack(void *pkt, int len) |
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{ |
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int maxsize = sizeof(*dhcp_ack); |
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if (!dhcp_ack) |
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dhcp_ack = malloc(maxsize); |
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memcpy(dhcp_ack, pkt, min(len, maxsize)); |
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} |
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/* This gets called from do_bootefi_exec(). */ |
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int efi_net_register(void **handle) |
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{ |
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struct efi_net_obj *netobj; |
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struct efi_device_path_file_path dp_net = { |
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.dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE, |
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.dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH, |
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.dp.length = sizeof(dp_net), |
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.str = { 'N', 'e', 't' }, |
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}; |
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struct efi_device_path_file_path dp_end = { |
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.dp.type = DEVICE_PATH_TYPE_END, |
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.dp.sub_type = DEVICE_PATH_SUB_TYPE_END, |
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.dp.length = sizeof(dp_end), |
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}; |
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if (!eth_get_dev()) { |
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/* No eth device active, don't expose any */ |
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return 0; |
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} |
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/* We only expose the "active" eth device, so one is enough */ |
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netobj = calloc(1, sizeof(*netobj)); |
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/* Fill in object data */ |
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netobj->parent.protocols[0].guid = &efi_net_guid; |
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netobj->parent.protocols[0].open = efi_return_handle; |
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netobj->parent.protocols[1].guid = &efi_guid_device_path; |
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netobj->parent.protocols[1].open = efi_net_open_dp; |
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netobj->parent.protocols[2].guid = &efi_pxe_guid; |
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netobj->parent.protocols[2].open = efi_net_open_pxe; |
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netobj->parent.handle = &netobj->net; |
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netobj->net.start = efi_net_start; |
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netobj->net.stop = efi_net_stop; |
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netobj->net.initialize = efi_net_initialize; |
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netobj->net.reset = efi_net_reset; |
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netobj->net.shutdown = efi_net_shutdown; |
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netobj->net.receive_filters = efi_net_receive_filters; |
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netobj->net.station_address = efi_net_station_address; |
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netobj->net.statistics = efi_net_statistics; |
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netobj->net.mcastiptomac = efi_net_mcastiptomac; |
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netobj->net.nvdata = efi_net_nvdata; |
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netobj->net.get_status = efi_net_get_status; |
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netobj->net.transmit = efi_net_transmit; |
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netobj->net.receive = efi_net_receive; |
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netobj->net.mode = &netobj->net_mode; |
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netobj->net_mode.state = EFI_NETWORK_STARTED; |
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netobj->dp[0] = dp_net; |
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netobj->dp[1] = dp_end; |
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memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6); |
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netobj->net_mode.max_packet_size = PKTSIZE; |
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netobj->pxe.mode = &netobj->pxe_mode; |
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if (dhcp_ack) |
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netobj->pxe_mode.dhcp_ack = *dhcp_ack; |
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/* Hook net up to the device list */ |
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list_add_tail(&netobj->parent.link, &efi_obj_list); |
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if (handle) |
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*handle = &netobj->net; |
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return 0; |
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} |
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