Move lessons to separate folder

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>

1 files changed, 268 insertions, 0 deletions

diff --git a/Lessons/Lesson_31/UefiLessonsPkg/ListPCI/ListPCI.c b/Lessons/Lesson_31/UefiLessonsPkg/ListPCI/ListPCI.c
new file mode 100644
index 0000000..055906c
--- /dev/null
+++ b/Lessons/Lesson_31/UefiLessonsPkg/ListPCI/ListPCI.c
@@ -0,0 +1,268 @@
+#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;
+}