u-boot/lib/efi_loader/efi_net.c

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/*
* EFI application network access support
*
* Copyright (c) 2016 Alexander Graf
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <efi_loader.h>
#include <inttypes.h>
#include <lcd.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_GUID;
static const efi_guid_t efi_pxe_guid = EFI_PXE_GUID;
static struct efi_pxe_packet *dhcp_ack;
static bool new_rx_packet;
static void *new_tx_packet;
struct efi_net_obj {
/* Generic EFI object parent class data */
struct efi_object parent;
/* EFI Interface callback struct for network */
struct efi_simple_network net;
struct efi_simple_network_mode net_mode;
/* Device path to the network adapter */
struct efi_device_path_mac_addr dp_mac;
struct efi_device_path_file_path dp_end;
/* PXE struct to transmit dhcp data */
struct efi_pxe pxe;
struct efi_pxe_mode pxe_mode;
};
static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this)
{
EFI_ENTRY("%p", this);
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this)
{
EFI_ENTRY("%p", this);
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this,
ulong extra_rx, ulong extra_tx)
{
EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx);
eth_init();
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this,
int extended_verification)
{
EFI_ENTRY("%p, %x", this, extended_verification);
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this)
{
EFI_ENTRY("%p", this);
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_receive_filters(
struct efi_simple_network *this, u32 enable, u32 disable,
int reset_mcast_filter, ulong mcast_filter_count,
struct efi_mac_address *mcast_filter)
{
EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable,
reset_mcast_filter, mcast_filter_count, mcast_filter);
/* XXX Do we care? */
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_station_address(
struct efi_simple_network *this, int reset,
struct efi_mac_address *new_mac)
{
EFI_ENTRY("%p, %x, %p", this, reset, new_mac);
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this,
int reset, ulong *stat_size,
void *stat_table)
{
EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table);
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this,
int ipv6,
struct efi_ip_address *ip,
struct efi_mac_address *mac)
{
EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac);
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this,
int read_write, ulong offset,
ulong buffer_size, char *buffer)
{
EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size,
buffer);
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this,
u32 *int_status, void **txbuf)
{
EFI_ENTRY("%p, %p, %p", this, int_status, txbuf);
/* We send packets synchronously, so nothing is outstanding */
if (int_status)
*int_status = 0;
if (txbuf)
*txbuf = new_tx_packet;
new_tx_packet = NULL;
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_net_transmit(struct efi_simple_network *this,
ulong header_size, ulong buffer_size, void *buffer,
struct efi_mac_address *src_addr,
struct efi_mac_address *dest_addr, u16 *protocol)
{
EFI_ENTRY("%p, %lx, %lx, %p, %p, %p, %p", this, header_size,
buffer_size, buffer, src_addr, dest_addr, protocol);
if (header_size) {
/* We would need to create the header if header_size != 0 */
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
/* Ethernet packets always fit, just bounce */
memcpy(efi_bounce_buffer, buffer, buffer_size);
net_send_packet(efi_bounce_buffer, buffer_size);
#else
net_send_packet(buffer, buffer_size);
#endif
new_tx_packet = buffer;
return EFI_EXIT(EFI_SUCCESS);
}
static void efi_net_push(void *pkt, int len)
{
new_rx_packet = true;
}
static efi_status_t EFIAPI efi_net_receive(struct efi_simple_network *this,
ulong *header_size, ulong *buffer_size, void *buffer,
struct efi_mac_address *src_addr,
struct efi_mac_address *dest_addr, u16 *protocol)
{
EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size,
buffer_size, buffer, src_addr, dest_addr, protocol);
push_packet = efi_net_push;
eth_rx();
push_packet = NULL;
if (!new_rx_packet)
return EFI_EXIT(EFI_NOT_READY);
if (*buffer_size < net_rx_packet_len) {
/* Packet doesn't fit, try again with bigger buf */
*buffer_size = net_rx_packet_len;
return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
}
memcpy(buffer, net_rx_packet, net_rx_packet_len);
*buffer_size = net_rx_packet_len;
new_rx_packet = false;
return EFI_EXIT(EFI_SUCCESS);
}
void efi_net_set_dhcp_ack(void *pkt, int len)
{
int maxsize = sizeof(*dhcp_ack);
if (!dhcp_ack)
dhcp_ack = malloc(maxsize);
memcpy(dhcp_ack, pkt, min(len, maxsize));
}
/* This gets called from do_bootefi_exec(). */
int efi_net_register(void **handle)
{
struct efi_net_obj *netobj;
struct efi_device_path_mac_addr dp_net = {
.dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE,
.dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR,
.dp.length = sizeof(dp_net),
};
struct efi_device_path_file_path dp_end = {
.dp.type = DEVICE_PATH_TYPE_END,
.dp.sub_type = DEVICE_PATH_SUB_TYPE_END,
.dp.length = sizeof(dp_end),
};
if (!eth_get_dev()) {
/* No eth device active, don't expose any */
return 0;
}
/* We only expose the "active" eth device, so one is enough */
netobj = calloc(1, sizeof(*netobj));
/* Fill in object data */
netobj->parent.protocols[0].guid = &efi_net_guid;
netobj->parent.protocols[0].protocol_interface = &netobj->net;
netobj->parent.protocols[1].guid = &efi_guid_device_path;
netobj->parent.protocols[1].protocol_interface = &netobj->dp_mac;
netobj->parent.protocols[2].guid = &efi_pxe_guid;
netobj->parent.protocols[2].protocol_interface = &netobj->pxe;
netobj->parent.handle = &netobj->net;
netobj->net.start = efi_net_start;
netobj->net.stop = efi_net_stop;
netobj->net.initialize = efi_net_initialize;
netobj->net.reset = efi_net_reset;
netobj->net.shutdown = efi_net_shutdown;
netobj->net.receive_filters = efi_net_receive_filters;
netobj->net.station_address = efi_net_station_address;
netobj->net.statistics = efi_net_statistics;
netobj->net.mcastiptomac = efi_net_mcastiptomac;
netobj->net.nvdata = efi_net_nvdata;
netobj->net.get_status = efi_net_get_status;
netobj->net.transmit = efi_net_transmit;
netobj->net.receive = efi_net_receive;
netobj->net.mode = &netobj->net_mode;
netobj->net_mode.state = EFI_NETWORK_STARTED;
netobj->dp_mac = dp_net;
netobj->dp_end = dp_end;
memcpy(netobj->dp_mac.mac.addr, eth_get_ethaddr(), 6);
memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6);
netobj->net_mode.max_packet_size = PKTSIZE;
netobj->pxe.mode = &netobj->pxe_mode;
if (dhcp_ack)
netobj->pxe_mode.dhcp_ack = *dhcp_ack;
/* Hook net up to the device list */
list_add_tail(&netobj->parent.link, &efi_obj_list);
if (handle)
*handle = &netobj->net;
return 0;
}