efi_loader: EFI_PXE_BASE_CODE_PROTOCOL stub

U-Boot implements the EFI_PXE_BASE_CODE_PROTOCOL because GRUB uses the mode
information for booting via PXE. All function pointers in the protocol were
NULL up to now which will cause immediate crashes when the services of the
protocol are called.

Create function stubs for all services of the protocol returning
EFI_UNSUPPORTED.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 129 insertions, 3 deletions

diff --git a/lib/efi_loader/efi_net.c b/lib/efi_loader/efi_net.c
index d71c663068..825e064f9a 100644
--- a/lib/efi_loader/efi_net.c
+++ b/lib/efi_loader/efi_net.c
@@ -10,7 +10,8 @@
 #include <malloc.h>
 
 static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
-static const efi_guid_t efi_pxe_guid = EFI_PXE_BASE_CODE_PROTOCOL_GUID;
+static const efi_guid_t efi_pxe_base_code_protocol_guid =
+					EFI_PXE_BASE_CODE_PROTOCOL_GUID;
 static struct efi_pxe_packet *dhcp_ack;
 static bool new_rx_packet;
 static void *new_tx_packet;
@@ -39,7 +40,7 @@ struct efi_net_obj {
 	struct efi_object header;
 	struct efi_simple_network net;
 	struct efi_simple_network_mode net_mode;
-	struct efi_pxe pxe;
+	struct efi_pxe_base_code_protocol pxe;
 	struct efi_pxe_mode pxe_mode;
 };
 
@@ -581,6 +582,118 @@ out:
 	EFI_EXIT(EFI_SUCCESS);
 }
 
+static efi_status_t EFIAPI efi_pxe_base_code_start(
+				struct efi_pxe_base_code_protocol *this,
+				u8 use_ipv6)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_stop(
+				struct efi_pxe_base_code_protocol *this)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_dhcp(
+				struct efi_pxe_base_code_protocol *this,
+				u8 sort_offers)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_discover(
+				struct efi_pxe_base_code_protocol *this,
+				u16 type, u16 *layer, u8 bis,
+				struct efi_pxe_base_code_discover_info *info)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_mtftp(
+				struct efi_pxe_base_code_protocol *this,
+				u32 operation, void *buffer_ptr,
+				u8 overwrite, efi_uintn_t *buffer_size,
+				struct efi_ip_address server_ip, char *filename,
+				struct efi_pxe_base_code_mtftp_info *info,
+				u8 dont_use_buffer)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_udp_write(
+				struct efi_pxe_base_code_protocol *this,
+				u16 op_flags, struct efi_ip_address *dest_ip,
+				u16 *dest_port,
+				struct efi_ip_address *gateway_ip,
+				struct efi_ip_address *src_ip, u16 *src_port,
+				efi_uintn_t *header_size, void *header_ptr,
+				efi_uintn_t *buffer_size, void *buffer_ptr)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_udp_read(
+				struct efi_pxe_base_code_protocol *this,
+				u16 op_flags, struct efi_ip_address *dest_ip,
+				u16 *dest_port, struct efi_ip_address *src_ip,
+				u16 *src_port, efi_uintn_t *header_size,
+				void *header_ptr, efi_uintn_t *buffer_size,
+				void *buffer_ptr)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_set_ip_filter(
+				struct efi_pxe_base_code_protocol *this,
+				struct efi_pxe_base_code_filter *new_filter)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_arp(
+				struct efi_pxe_base_code_protocol *this,
+				struct efi_ip_address *ip_addr,
+				struct efi_mac_address *mac_addr)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_set_parameters(
+				struct efi_pxe_base_code_protocol *this,
+				u8 *new_auto_arp, u8 *new_send_guid,
+				u8 *new_ttl, u8 *new_tos,
+				u8 *new_make_callback)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_set_station_ip(
+				struct efi_pxe_base_code_protocol *this,
+				struct efi_ip_address *new_station_ip,
+				struct efi_ip_address *new_subnet_mask)
+{
+	return EFI_UNSUPPORTED;
+}
+
+static efi_status_t EFIAPI efi_pxe_base_code_set_packets(
+				struct efi_pxe_base_code_protocol *this,
+				u8 *new_dhcp_discover_valid,
+				u8 *new_dhcp_ack_received,
+				u8 *new_proxy_offer_received,
+				u8 *new_pxe_discover_valid,
+				u8 *new_pxe_reply_received,
+				u8 *new_pxe_bis_reply_received,
+				EFI_PXE_BASE_CODE_PACKET *new_dchp_discover,
+				EFI_PXE_BASE_CODE_PACKET *new_dhcp_acc,
+				EFI_PXE_BASE_CODE_PACKET *new_proxy_offer,
+				EFI_PXE_BASE_CODE_PACKET *new_pxe_discover,
+				EFI_PXE_BASE_CODE_PACKET *new_pxe_reply,
+				EFI_PXE_BASE_CODE_PACKET *new_pxe_bis_reply)
+{
+	return EFI_UNSUPPORTED;
+}
+
 /**
  * efi_net_register() - register the simple network protocol
  *
@@ -619,7 +732,7 @@ efi_status_t efi_net_register(void)
 			     efi_dp_from_eth());
 	if (r != EFI_SUCCESS)
 		goto failure_to_add_protocol;
-	r = efi_add_protocol(&netobj->header, &efi_pxe_guid,
+	r = efi_add_protocol(&netobj->header, &efi_pxe_base_code_protocol_guid,
 			     &netobj->pxe);
 	if (r != EFI_SUCCESS)
 		goto failure_to_add_protocol;
@@ -644,6 +757,19 @@ efi_status_t efi_net_register(void)
 	netobj->net_mode.max_packet_size = PKTSIZE;
 	netobj->net_mode.if_type = ARP_ETHER;
 
+	netobj->pxe.revision = EFI_PXE_BASE_CODE_PROTOCOL_REVISION;
+	netobj->pxe.start = efi_pxe_base_code_start;
+	netobj->pxe.stop = efi_pxe_base_code_stop;
+	netobj->pxe.dhcp = efi_pxe_base_code_dhcp;
+	netobj->pxe.discover = efi_pxe_base_code_discover;
+	netobj->pxe.mtftp = efi_pxe_base_code_mtftp;
+	netobj->pxe.udp_write = efi_pxe_base_code_udp_write;
+	netobj->pxe.udp_read = efi_pxe_base_code_udp_read;
+	netobj->pxe.set_ip_filter = efi_pxe_base_code_set_ip_filter;
+	netobj->pxe.arp = efi_pxe_base_code_arp;
+	netobj->pxe.set_parameters = efi_pxe_base_code_set_parameters;
+	netobj->pxe.set_station_ip = efi_pxe_base_code_set_station_ip;
+	netobj->pxe.set_packets = efi_pxe_base_code_set_packets;
 	netobj->pxe.mode = &netobj->pxe_mode;
 	if (dhcp_ack)
 		netobj->pxe_mode.dhcp_ack = *dhcp_ack;