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https://github.com/brain-hackers/u-boot-brain
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![Alexander Graf](/assets/img/avatar_default.png)
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>
292 lines
7.7 KiB
C
292 lines
7.7 KiB
C
/*
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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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