Re: [PATCH V2 2/2] IntelSiliconPkg/VtdPeiSample: Add premem support.

["Zeng, Star" <star.zeng@intel.com>]

Could you update the function comments of InitDmar() and SiliconInitializedPpiNotifyCallback()?
There are two lines of " DEBUG ((DEBUG_INFO, "MchBar - %x\n", MchBar)) " in InitDmar(), are they added on purpose?

Thanks,
Star
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Jiewen Yao
Sent: Friday, October 27, 2017 1:41 PM
To: edk2-devel@lists.01.org
Cc: Zeng, Star <star.zeng@intel.com>
Subject: [edk2] [PATCH V2 2/2] IntelSiliconPkg/VtdPeiSample: Add premem support.

Before memory is ready, this sample produces one VTd engine.
After memory and silicon is initialized, this sample produces both IGD VTd engine and all-rest VTd engine by reinstall the FV_INFO_PPI.

This update is to demonstrate how to support pre-mem VTd usage.

Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
---
 IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.c   | 234 +++++++++++++++++---
 IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.inf |   2 +-
 2 files changed, 202 insertions(+), 34 deletions(-)

diff --git a/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.c b/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.c
index 6267da7..921daef 100644
--- a/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.c
+++ b/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdIn
+++ foSamplePei.c
@@ -20,6 +20,7 @@
 #include <Library/DebugLib.h>
 #include <Library/PciLib.h>
 #include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
 
 #define R_SA_MCHBAR               (0x48)
 #define R_SA_GGC                  (0x50)
@@ -33,6 +34,8 @@
 #define R_SA_MCHBAR_VTD1_OFFSET  0x5400  ///< HW UNIT for IGD  #define R_SA_MCHBAR_VTD2_OFFSET  0x5410  ///< HW UNIT for all other - PEG, USB, SATA etc
 
+EFI_GUID gEdkiiSiliconInitializedPpiGuid = {0x82a72dc8, 0x61ec, 0x403e, 
+{0xb1, 0x5a, 0x8d, 0x7a, 0x3a, 0x71, 0x84, 0x98}};
+
 typedef struct {
   EFI_ACPI_DMAR_HEADER                         DmarHeader;
   //
@@ -131,50 +134,190 @@ EFI_PEI_PPI_DESCRIPTOR mPlatformVTdInfoSampleDesc = {
   &mPlatformVTdSample
 };
 
+typedef struct {
+  EFI_ACPI_DMAR_HEADER                         DmarHeader;
+  //
+  // VTd engine 2 - all rest
+  //
+  EFI_ACPI_DMAR_DRHD_HEADER                    Drhd2;
+} MY_VTD_INFO_NO_IGD_PPI;
+
+MY_VTD_INFO_NO_IGD_PPI  mPlatformVTdNoIgdSample = {
+  { // DmarHeader
+    { // Header
+      EFI_ACPI_4_0_DMA_REMAPPING_TABLE_SIGNATURE,
+      sizeof(MY_VTD_INFO_PPI),
+      EFI_ACPI_DMAR_REVISION,
+    },
+    0x26, // HostAddressWidth
+  },
+
+  { // Drhd2
+    { // Header
+      EFI_ACPI_DMAR_TYPE_DRHD,
+      sizeof(EFI_ACPI_DMAR_DRHD_HEADER)
+    },
+    EFI_ACPI_DMAR_DRHD_FLAGS_INCLUDE_PCI_ALL, // Flags
+    0, // Reserved
+    0, // SegmentNumber
+    0xFED91000 // RegisterBaseAddress -- TO BE PATCHED
+  },
+};
+
+EFI_PEI_PPI_DESCRIPTOR mPlatformVTdNoIgdInfoSampleDesc = {
+  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+  &gEdkiiVTdInfoPpiGuid,
+  &mPlatformVTdNoIgdSample
+};
+
 /**
   Patch Graphic UMA address in RMRR and base address.
 **/
 VOID
-PatchDmar (
+InitDmar (
   VOID
   )
 {
   UINT32              MchBar;
-  UINT16              IgdMode;
-  UINT16              GttMode;
-  UINT32              IgdMemSize;
-  UINT32              GttMemSize;
-
-  ///
-  /// Calculate IGD memsize
-  ///
-  IgdMode = ((PciRead16 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_GGC)) & B_SKL_SA_GGC_GMS_MASK) >> N_SKL_SA_GGC_GMS_OFFSET) & 0xFF;
-  if (IgdMode < 0xF0) {
-    IgdMemSize = IgdMode * 32 * (1024) * (1024);
+
+  DEBUG ((DEBUG_INFO, "InitDmar\n"));
+
+  MchBar = PciRead32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_MCHBAR)) & ~BIT0;  
+ DEBUG ((DEBUG_INFO, "MchBar - %x\n", MchBar));
+
+  PciWrite32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_MCHBAR), 0xFED10000 | 
+ BIT0);  DEBUG ((DEBUG_INFO, "MchBar - %x\n", MchBar));
+
+  DEBUG ((DEBUG_INFO, "VTd2 - %x\n", (MmioRead32 (MchBar + 
+R_SA_MCHBAR_VTD2_OFFSET) &~1)));
+  MmioWrite32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET, 
+(UINT32)mPlatformVTdSample.Drhd2.RegisterBaseAddress | 1);
+  DEBUG ((DEBUG_INFO, "VTd2 - %x\n", (MmioRead32 (MchBar + 
+R_SA_MCHBAR_VTD2_OFFSET) &~1))); }
+
+/**
+  Patch Graphic UMA address in RMRR and base address.
+**/
+EFI_PEI_PPI_DESCRIPTOR *
+PatchDmar (
+  VOID
+  )
+{
+  UINT32                  MchBar;
+  UINT16                  IgdMode;
+  UINT16                  GttMode;
+  UINT32                  IgdMemSize;
+  UINT32                  GttMemSize;
+  MY_VTD_INFO_PPI         *PlatformVTdSample;
+  EFI_PEI_PPI_DESCRIPTOR  *PlatformVTdInfoSampleDesc;
+  MY_VTD_INFO_NO_IGD_PPI  *PlatformVTdNoIgdSample;
+  EFI_PEI_PPI_DESCRIPTOR  *PlatformVTdNoIgdInfoSampleDesc;
+
+  DEBUG ((DEBUG_INFO, "PatchDmar\n"));
+
+  if (PciRead16 (PCI_LIB_ADDRESS(0, 2, 0, 0)) != 0xFFFF) {
+    PlatformVTdSample = AllocateCopyPool (sizeof(MY_VTD_INFO_PPI), &mPlatformVTdSample);
+    ASSERT(PlatformVTdSample != NULL);
+    PlatformVTdInfoSampleDesc = AllocateCopyPool (sizeof(EFI_PEI_PPI_DESCRIPTOR), &mPlatformVTdInfoSampleDesc);
+    ASSERT(PlatformVTdInfoSampleDesc != NULL);
+    PlatformVTdInfoSampleDesc->Ppi = PlatformVTdSample;
+
+    ///
+    /// Calculate IGD memsize
+    ///
+    IgdMode = ((PciRead16 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_GGC)) & B_SKL_SA_GGC_GMS_MASK) >> N_SKL_SA_GGC_GMS_OFFSET) & 0xFF;
+    if (IgdMode < 0xF0) {
+      IgdMemSize = IgdMode * 32 * (1024) * (1024);
+    } else {
+      IgdMemSize = 4 * (IgdMode - 0xF0 + 1) * (1024) * (1024);
+    }
+
+    ///
+    /// Calculate GTT mem size
+    ///
+    GttMemSize = 0;
+    GttMode = (PciRead16 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_GGC)) & B_SKL_SA_GGC_GGMS_MASK) >> N_SKL_SA_GGC_GGMS_OFFSET;
+    if (GttMode <= V_SKL_SA_GGC_GGMS_8MB) {
+      GttMemSize = (1 << GttMode) * (1024) * (1024);
+    }
+
+    PlatformVTdSample->Rmrr1.ReservedMemoryRegionBaseAddress  = (PciRead32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_TOLUD)) & ~(0x01)) - IgdMemSize - GttMemSize;
+    PlatformVTdSample->Rmrr1.ReservedMemoryRegionLimitAddress = 
+ PlatformVTdSample->Rmrr1.ReservedMemoryRegionBaseAddress + IgdMemSize 
+ + GttMemSize - 1;
+
+    ///
+    /// Update DRHD structures of DmarTable
+    ///
+    MchBar = PciRead32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_MCHBAR)) & ~BIT0;
+
+    DEBUG ((DEBUG_INFO, "VTd1 - %x\n", (MmioRead32 (MchBar + R_SA_MCHBAR_VTD1_OFFSET))));
+    if ((MmioRead32 (MchBar + R_SA_MCHBAR_VTD1_OFFSET) &~1) != 0) {
+      PlatformVTdSample->Drhd1.RegisterBaseAddress = (MmioRead32 (MchBar + R_SA_MCHBAR_VTD1_OFFSET) &~1);
+    } else {
+      MmioWrite32 (MchBar + R_SA_MCHBAR_VTD1_OFFSET, (UINT32)PlatformVTdSample->Drhd1.RegisterBaseAddress | 1);
+    }
+
+    DEBUG ((DEBUG_INFO, "VTd2 - %x\n", (MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET))));
+    if ((MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET) &~1) != 0) {
+      PlatformVTdSample->Drhd2.RegisterBaseAddress = (MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET) &~1);
+    } else {
+      MmioWrite32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET, (UINT32)PlatformVTdSample->Drhd2.RegisterBaseAddress | 1);
+    }
+
+    return PlatformVTdInfoSampleDesc;
   } else {
-    IgdMemSize = 4 * (IgdMode - 0xF0 + 1) * (1024) * (1024);
-  }
+    PlatformVTdNoIgdSample = AllocateCopyPool (sizeof(MY_VTD_INFO_NO_IGD_PPI), &mPlatformVTdNoIgdSample);
+    ASSERT(PlatformVTdNoIgdSample != NULL);
+    PlatformVTdNoIgdInfoSampleDesc = AllocateCopyPool (sizeof(EFI_PEI_PPI_DESCRIPTOR), &mPlatformVTdNoIgdInfoSampleDesc);
+    ASSERT(PlatformVTdNoIgdInfoSampleDesc != NULL);
+    PlatformVTdNoIgdInfoSampleDesc->Ppi = PlatformVTdNoIgdSample;
+
+    ///
+    /// Update DRHD structures of DmarTable
+    ///
+    MchBar = PciRead32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_MCHBAR)) & ~BIT0;
 
-  ///
-  /// Calculate GTT mem size
-  ///
-  GttMemSize = 0;
-  GttMode = (PciRead16 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_GGC)) & B_SKL_SA_GGC_GGMS_MASK) >> N_SKL_SA_GGC_GGMS_OFFSET;
-  if (GttMode <= V_SKL_SA_GGC_GGMS_8MB) {
-    GttMemSize = (1 << GttMode) * (1024) * (1024);
+    DEBUG ((DEBUG_INFO, "VTd2 - %x\n", (MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET))));
+    if ((MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET) &~1) != 0) {
+      PlatformVTdNoIgdSample->Drhd2.RegisterBaseAddress = (MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET) &~1);
+    } else {
+      MmioWrite32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET, (UINT32)PlatformVTdNoIgdSample->Drhd2.RegisterBaseAddress | 1);
+    }
+
+    return PlatformVTdNoIgdInfoSampleDesc;
   }
+}
 
-  mPlatformVTdSample.Rmrr1.ReservedMemoryRegionBaseAddress  = (PciRead32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_TOLUD)) & ~(0x01)) - IgdMemSize - GttMemSize;
-  mPlatformVTdSample.Rmrr1.ReservedMemoryRegionLimitAddress = mPlatformVTdSample.Rmrr1.ReservedMemoryRegionBaseAddress + IgdMemSize + GttMemSize - 1;
+/**
+  Install Firmware Volume Hob's once there is main memory
 
-  ///
-  /// Update DRHD structures of DmarTable
-  ///
-  MchBar = PciRead32 (PCI_LIB_ADDRESS(0, 0, 0, R_SA_MCHBAR)) & ~BIT0;
-  mPlatformVTdSample.Drhd1.RegisterBaseAddress = (MmioRead32 (MchBar + R_SA_MCHBAR_VTD1_OFFSET) &~1);
-  mPlatformVTdSample.Drhd2.RegisterBaseAddress = (MmioRead32 (MchBar + R_SA_MCHBAR_VTD2_OFFSET) &~1);
+  @param[in]  PeiServices       General purpose services available to every PEIM.
+  @param[in]  NotifyDescriptor  Notify that this module published.
+  @param[in]  Ppi               PPI that was installed.
+
+  @retval     EFI_SUCCESS       The function completed successfully.
+**/
+EFI_STATUS
+EFIAPI
+SiliconInitializedPpiNotifyCallback (
+  IN CONST EFI_PEI_SERVICES     **PeiServices,
+  IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,
+  IN VOID                       *Ppi
+  )
+{
+  EFI_STATUS               Status;
+  EFI_PEI_PPI_DESCRIPTOR   *PpiDesc;
+
+  PpiDesc = PatchDmar ();
+
+  Status = PeiServicesReInstallPpi (&mPlatformVTdNoIgdInfoSampleDesc, 
+ PpiDesc);  ASSERT_EFI_ERROR (Status);  return EFI_SUCCESS;
 }
 
+EFI_PEI_NOTIFY_DESCRIPTOR mSiliconInitializedNotifyList = {
+  (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | 
+EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+  &gEdkiiSiliconInitializedPpiGuid,
+  (EFI_PEIM_NOTIFY_ENTRY_POINT) SiliconInitializedPpiNotifyCallback
+};
+
 /**
   Platform VTd Info sample driver.
 
@@ -190,12 +333,37 @@ PlatformVTdInfoSampleInitialize (
   IN CONST EFI_PEI_SERVICES     **PeiServices
   )
 {
-  EFI_STATUS  Status;
+  EFI_STATUS               Status;
+  BOOLEAN                  SiliconInitialized;
+  VOID                     *SiliconInitializedPpi;
+  EFI_PEI_PPI_DESCRIPTOR   *PpiDesc;
+
+  SiliconInitialized = FALSE;
+  //
+  // Check if silicon is initialized.
+  //
+  Status = PeiServicesLocatePpi (
+             &gEdkiiSiliconInitializedPpiGuid,
+             0,
+             NULL,
+             &SiliconInitializedPpi
+             );
+  if (!EFI_ERROR(Status)) {
+    SiliconInitialized = TRUE;
+  }
+  DEBUG ((DEBUG_INFO, "SiliconInitialized - %x\n", 
+ SiliconInitialized));  if (!SiliconInitialized) {
+    Status = PeiServicesNotifyPpi (&mSiliconInitializedNotifyList);
+    InitDmar ();
 
-  PatchDmar ();
+    Status = PeiServicesInstallPpi (&mPlatformVTdNoIgdInfoSampleDesc);
+    ASSERT_EFI_ERROR (Status);
+  } else {
+    PpiDesc = PatchDmar ();
 
-  Status = PeiServicesInstallPpi (&mPlatformVTdInfoSampleDesc);
-  ASSERT_EFI_ERROR (Status);
+    Status = PeiServicesInstallPpi (PpiDesc);
+    ASSERT_EFI_ERROR (Status);
+  }
 
   return Status;
 }
diff --git a/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.inf b/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.inf
index 96adb70..a4ffe51 100644
--- a/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdInfoSamplePei.inf
+++ b/IntelSiliconPkg/Feature/VTd/PlatformVTdInfoSamplePei/PlatformVTdIn
+++ foSamplePei.inf
@@ -47,7 +47,7 @@
   gEdkiiVTdInfoPpiGuid         ## PRODUCES
 
 [Depex]
-  gEfiPeiMemoryDiscoveredPpiGuid
+  gEfiPeiMasterBootModePpiGuid
 
 [UserExtensions.TianoCore."ExtraFiles"]
   PlatformVTdInfoSamplePeiExtra.uni
--
2.7.4.windows.1

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