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/*
* Copyright (c) 2021, Konstantin Aladyshev <aladyshev22@gmail.com>
*
* SPDX-License-Identifier: MIT
*/
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/PciRootBridgeIo.h>
#include <Library/MemoryAllocationLib.h>
#include <IndustryStandard/Pci.h>
#include <Library/ShellLib.h>
#include <Library/PrintLib.h>
#define DESCRIPTOR_STR_MAX_SIZE 200
#define BLOCK_READ_SIZE (1024*4)
VOID ToLowerASCII(CHAR8* Str, UINTN Size)
{
for (UINT8 i=0; i<Size; i++) {
if ((Str[i]>='A')&&(Str[i]<='Z')) {
Str[i]+=32;
}
}
}
EFI_STATUS FindPCIDevDescription(IN UINT16 VendorId,
IN UINT16 DeviceId,
OUT CHAR16* VendorDesc,
OUT CHAR16* DeviceDesc,
IN UINTN DescBufferSize)
{
BOOLEAN Vendor_found = FALSE;
BOOLEAN Device_found = FALSE;
EFI_STATUS Status = ShellFileExists(L"pci.ids");
if (EFI_ERROR(Status))
{
Print(L"No file pci.ids: %r\n", Status);
return Status;
}
SHELL_FILE_HANDLE FileHandle;
Status = ShellOpenFileByName(L"pci.ids",
&FileHandle,
EFI_FILE_MODE_READ,
0);
if (EFI_ERROR(Status))
{
Print(L"Can't open file pci.ids: %r\n", Status);
return Status;
}
UINT64 FileSize;
Status = ShellGetFileSize(FileHandle, &FileSize);
if (EFI_ERROR(Status))
{
Print(L"Can't get file size for file pci.ids: %r\n", Status);
goto end;
}
CHAR8 VendorStr[5];
CHAR8 DeviceStr[5];
AsciiValueToStringS(VendorStr,
5,
RADIX_HEX | PREFIX_ZERO,
VendorId,
4);
AsciiValueToStringS(DeviceStr,
5,
RADIX_HEX | PREFIX_ZERO,
DeviceId,
4);
ToLowerASCII(VendorStr, 4);
ToLowerASCII(DeviceStr, 4);
CHAR8 Buffer[BLOCK_READ_SIZE];
UINTN Size;
UINT64 FilePos = 0;
while (TRUE)
{
Size = BLOCK_READ_SIZE;
Status = ShellReadFile(FileHandle, &Size, Buffer);
if (EFI_ERROR(Status))
{
Print(L"Can't read file pci.ids: %r\n", Status);
goto end;
}
UINTN StrStart = 0;
UINTN StrEnd = 0;
for (UINTN i=0; i<Size; i++) {
if (Buffer[i]=='\n') {
StrEnd=i;
if (!Vendor_found){
// 0123456 7
//\nVVVV |<desc>|\n
if ((StrEnd - StrStart) > 7) {
if ((Buffer[StrStart+1]==VendorStr[0]) &&
(Buffer[StrStart+2]==VendorStr[1]) &&
(Buffer[StrStart+3]==VendorStr[2]) &&
(Buffer[StrStart+4]==VendorStr[3])) {
Buffer[StrEnd] = 0;
UnicodeSPrintAsciiFormat(VendorDesc, DescBufferSize, "%a", &Buffer[StrStart+1+4+2]);
Vendor_found = TRUE;
}
}
} else {
// 0 1234567 8
//\n\tDDDD |<desc>|\n
if ((StrEnd - StrStart) > 8) {
if ((Buffer[StrStart+1]=='\t') &&
(Buffer[StrStart+2]==DeviceStr[0]) &&
(Buffer[StrStart+3]==DeviceStr[1]) &&
(Buffer[StrStart+4]==DeviceStr[2]) &&
(Buffer[StrStart+5]==DeviceStr[3])) {
Buffer[StrEnd] = 0;
UnicodeSPrintAsciiFormat(DeviceDesc, DescBufferSize, "%a", &Buffer[StrStart+1+1+4+2]);
Device_found = TRUE;
goto end;
}
}
}
StrStart = StrEnd;
}
}
if (FilePos+Size >= FileSize) {
break;
}
FilePos += StrEnd;
Status = ShellSetFilePosition(FileHandle, FilePos);
if (EFI_ERROR(Status))
{
Print(L"Can't set file position pci.ids: %r\n", Status);
goto end;
}
}
end:
if (!Vendor_found) {
UnicodeSPrint(VendorDesc, DescBufferSize, L"Undefined");
}
if (!Device_found) {
UnicodeSPrint(DeviceDesc, DescBufferSize, L"Undefined");
}
ShellCloseFile(&FileHandle);
return Status;
}
UINT64 PciConfigurationAddress(UINT8 Bus,
UINT8 Device,
UINT8 Function,
UINT32 Register)
{
UINT64 Address = (((UINT64)Bus) << 24) + (((UINT64)Device) << 16) + (((UINT64)Function) << 8);
if (Register & 0xFFFFFF00) {
Address += (((UINT64)Register) << 32);
} else {
Address += (((UINT64)Register) << 0);
}
return Address;
}
EFI_STATUS PrintRootBridge(EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL* PciRootBridgeIo)
{
EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR* AddressDescriptor;
EFI_STATUS Status = PciRootBridgeIo->Configuration(
PciRootBridgeIo,
(VOID**)&AddressDescriptor
);
if (EFI_ERROR(Status)) {
Print(L"\tError! Can't get EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR: %r\n", Status);
return Status;
}
while (AddressDescriptor->Desc != ACPI_END_TAG_DESCRIPTOR) {
if (AddressDescriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_BUS) {
for (UINT8 Bus = AddressDescriptor->AddrRangeMin; Bus <= AddressDescriptor->AddrRangeMax; Bus++) {
for (UINT8 Device = 0; Device <= PCI_MAX_DEVICE; Device++) {
for (UINT8 Func = 0; Func <= PCI_MAX_FUNC; Func++) {
UINT64 Address = PciConfigurationAddress(Bus, Device, Func, 0);
PCI_DEVICE_INDEPENDENT_REGION PCIConfHdr;
Status = PciRootBridgeIo->Pci.Read(
PciRootBridgeIo,
EfiPciWidthUint8,
Address,
sizeof(PCI_DEVICE_INDEPENDENT_REGION),
&PCIConfHdr
);
if (!EFI_ERROR(Status)) {
if (PCIConfHdr.VendorId != 0xffff) {
Print(L" %02x:%02x.%02x - Vendor:%04x, Device:%04x",
Bus,
Device,
Func,
PCIConfHdr.VendorId,
PCIConfHdr.DeviceId);
CHAR16 VendorDesc[DESCRIPTOR_STR_MAX_SIZE];
CHAR16 DeviceDesc[DESCRIPTOR_STR_MAX_SIZE];
Status = FindPCIDevDescription(PCIConfHdr.VendorId,
PCIConfHdr.DeviceId,
VendorDesc,
DeviceDesc,
DESCRIPTOR_STR_MAX_SIZE);
if (!EFI_ERROR(Status)) {
Print(L": %s, %s\n", VendorDesc, DeviceDesc);
} else {
Print(L"\n");
}
}
} else {
Print(L" Error in PCI read: %r\n", Status);
}
}
}
}
}
AddressDescriptor++;
}
return Status;
}
EFI_STATUS
EFIAPI
UefiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
Status = gBS->LocateHandleBuffer(
ByProtocol,
&gEfiPciRootBridgeIoProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
Print(L"Can't locate EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL: %r\n", Status);
return Status;
}
Print(L"Number of PCI root bridges in the system: %d\n", HandleCount);
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL* PciRootBridgeIo;
for (UINTN Index = 0; Index < HandleCount; Index++) {
Status = gBS->OpenProtocol (
HandleBuffer[Index],
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **)&PciRootBridgeIo,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR(Status)) {
Print(L"Can't open protocol: %r\n", Status);
return Status;
}
Print(L"\nPCI Root Bridge %d\n", Index);
Status = PrintRootBridge(PciRootBridgeIo);
if (EFI_ERROR(Status)) {
Print(L"Error in PCI Root Bridge printing\n");
}
}
FreePool(HandleBuffer);
return EFI_SUCCESS;
}
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