[edk2-devel][edk2-platforms][PATCH v2 3/6] IntelSiliconPkg/Feature/SmmControl: Implement PPI with chipset support

["Benjamin Doron" <benjamin.doron00@gmail.com>]

S3 resume may require communication with SMM, for which we need the
SmmControl PPI. Therefore, port the DXE drivers to a library, like there
is for SMM Access.

Tested, working on Kabylake. Further testing required after the refactor
for compatibility.

Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Cc: Isaac Oram <isaac.w.oram@intel.com>
Signed-off-by: Benjamin Doron <benjamin.doron00@gmail.com>
---
 .../PeiSmmControlLib/PeiSmmControlLib.c       | 309 ++++++++++++++++++
 .../PeiSmmControlLib/PeiSmmControlLib.inf     |  34 ++
 .../Include/Library/SmmControlLib.h           |  26 ++
 .../Intel/IntelSiliconPkg/IntelSiliconPkg.dec |   4 +
 4 files changed, 373 insertions(+)
 create mode 100644 Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.c
 create mode 100644 Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.inf
 create mode 100644 Silicon/Intel/IntelSiliconPkg/Include/Library/SmmControlLib.h

diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.c b/Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.c
new file mode 100644
index 000000000000..cc6c7f8fe672
--- /dev/null
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.c
@@ -0,0 +1,309 @@
+/** @file
+  This is to publish the SMM Control Ppi instance.
+
+  Copyright (c) 2019 - 2020, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#include <Uefi/UefiBaseType.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <Ppi/MmControl.h>
+#include <IndustryStandard/Pci30.h>
+
+#define SMM_CONTROL_PRIVATE_DATA_SIGNATURE  SIGNATURE_32 ('i', '4', 's', 'c')
+
+typedef struct {
+  UINTN                           Signature;
+  EFI_HANDLE                      Handle;
+  EFI_PEI_MM_CONTROL_PPI          SmmControl;
+} SMM_CONTROL_PRIVATE_DATA;
+
+#define SMM_CONTROL_PRIVATE_DATA_FROM_THIS(a) \
+        CR (a, \
+          SMM_CONTROL_PRIVATE_DATA, \
+          SmmControl, \
+          SMM_CONTROL_DEV_SIGNATURE \
+      )
+
+//
+// Common registers:
+//
+//
+// APM Registers
+//
+#define R_PCH_APM_CNT                             0xB2
+//
+// ACPI and legacy I/O register offsets from ACPIBASE
+//
+#define R_PCH_ACPI_PM1_STS                        0x00
+#define B_PCH_ACPI_PM1_STS_PRBTNOR                BIT11
+
+#define R_PCH_SMI_EN                              0x30
+
+#define R_PCH_SMI_STS                             0x34
+#define B_PCH_SMI_STS_APM                         BIT5
+#define B_PCH_SMI_EN_APMC                         BIT5
+#define B_PCH_SMI_EN_EOS                          BIT1
+#define B_PCH_SMI_EN_GBL_SMI                      BIT0
+
+/**
+  Trigger the software SMI
+
+  @param[in] Data                 The value to be set on the software SMI data port
+
+  @retval EFI_SUCCESS             Function completes successfully
+**/
+EFI_STATUS
+EFIAPI
+SmmTrigger (
+  UINT8   Data
+  )
+{
+  UINT16  ABase;
+  UINT32  OutputData;
+  UINT32  OutputPort;
+
+  ABase = FixedPcdGet16 (PcdAcpiBaseAddress);
+
+  ///
+  /// Enable the APMC SMI
+  ///
+  OutputPort  = ABase + R_PCH_SMI_EN;
+  OutputData  = IoRead32 ((UINTN) OutputPort);
+  OutputData |= (B_PCH_SMI_EN_APMC | B_PCH_SMI_EN_GBL_SMI);
+  DEBUG (
+    (DEBUG_EVENT,
+     "The SMI Control Port at address %x will be written to %x.\n",
+     OutputPort,
+     OutputData)
+    );
+  IoWrite32 (
+    (UINTN) OutputPort,
+    (UINT32) (OutputData)
+    );
+
+  OutputPort  = R_PCH_APM_CNT;
+  OutputData  = Data;
+
+  ///
+  /// Generate the APMC SMI
+  ///
+  IoWrite8 (
+    (UINTN) OutputPort,
+    (UINT8) (OutputData)
+    );
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Clear the SMI status
+
+
+  @retval EFI_SUCCESS             The function completes successfully
+  @retval EFI_DEVICE_ERROR        Something error occurred
+**/
+EFI_STATUS
+EFIAPI
+SmmClear (
+  VOID
+  )
+{
+  UINT16  ABase;
+  UINT32  OutputData;
+  UINT32  OutputPort;
+
+  ABase = FixedPcdGet16 (PcdAcpiBaseAddress);
+
+  ///
+  /// Clear the Power Button Override Status Bit, it gates EOS from being set.
+  ///
+  OutputPort  = ABase + R_PCH_ACPI_PM1_STS;
+  OutputData  = B_PCH_ACPI_PM1_STS_PRBTNOR;
+  DEBUG (
+    (DEBUG_EVENT,
+     "The PM1 Status Port at address %x will be written to %x.\n",
+     OutputPort,
+     OutputData)
+    );
+  IoWrite16 (
+    (UINTN) OutputPort,
+    (UINT16) (OutputData)
+    );
+
+  ///
+  /// Clear the APM SMI Status Bit
+  ///
+  OutputPort  = ABase + R_PCH_SMI_STS;
+  OutputData  = B_PCH_SMI_STS_APM;
+  DEBUG (
+    (DEBUG_EVENT,
+     "The SMI Status Port at address %x will be written to %x.\n",
+     OutputPort,
+     OutputData)
+    );
+  IoWrite32 (
+    (UINTN) OutputPort,
+    (UINT32) (OutputData)
+    );
+
+  ///
+  /// Set the EOS Bit
+  ///
+  OutputPort  = ABase + R_PCH_SMI_EN;
+  OutputData  = IoRead32 ((UINTN) OutputPort);
+  OutputData |= B_PCH_SMI_EN_EOS;
+  DEBUG (
+    (DEBUG_EVENT,
+     "The SMI Control Port at address %x will be written to %x.\n",
+     OutputPort,
+     OutputData)
+    );
+  IoWrite32 (
+    (UINTN) OutputPort,
+    (UINT32) (OutputData)
+    );
+
+  ///
+  /// There is no need to read EOS back and check if it is set.
+  /// This can lead to a reading of zero if an SMI occurs right after the SMI_EN port read
+  /// but before the data is returned to the CPU.
+  /// SMM Dispatcher should make sure that EOS is set after all SMI sources are processed.
+  ///
+  return EFI_SUCCESS;
+}
+
+/**
+  This routine generates an SMI
+
+  @param[in] This                       The EFI SMM Control protocol instance
+  @param[in, out] ArgumentBuffer        The buffer of argument
+  @param[in, out] ArgumentBufferSize    The size of the argument buffer
+  @param[in] Periodic                   Periodic or not
+  @param[in] ActivationInterval         Interval of periodic SMI
+
+  @retval EFI Status                    Describing the result of the operation
+  @retval EFI_INVALID_PARAMETER         Some parameter value passed is not supported
+**/
+EFI_STATUS
+EFIAPI
+Activate (
+  IN EFI_PEI_SERVICES        **PeiServices,
+  IN EFI_PEI_MM_CONTROL_PPI  * This,
+  IN OUT INT8                *ArgumentBuffer OPTIONAL,
+  IN OUT UINTN               *ArgumentBufferSize OPTIONAL,
+  IN BOOLEAN                 Periodic OPTIONAL,
+  IN UINTN                   ActivationInterval OPTIONAL
+  )
+{
+  EFI_STATUS  Status;
+  UINT8       Data;
+
+  if (Periodic) {
+    DEBUG ((DEBUG_WARN, "Invalid parameter\n"));
+    return EFI_INVALID_PARAMETER;
+  }
+
+  // NOTE: Copied from Quark. Matches the usage in PiSmmCommunicationPei
+  if (ArgumentBuffer == NULL) {
+    Data = 0xFF;
+  } else {
+    if (ArgumentBufferSize == NULL || *ArgumentBufferSize != 1) {
+      return EFI_INVALID_PARAMETER;
+    }
+
+    Data = *ArgumentBuffer;
+  }
+  ///
+  /// Clear any pending the APM SMI
+  ///
+  Status = SmmClear ();
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  return SmmTrigger (Data);
+}
+
+/**
+  This routine clears an SMI
+
+  @param[in] This                 The EFI SMM Control protocol instance
+  @param[in] Periodic             Periodic or not
+
+  @retval EFI Status              Describing the result of the operation
+  @retval EFI_INVALID_PARAMETER   Some parameter value passed is not supported
+**/
+EFI_STATUS
+EFIAPI
+Deactivate (
+  IN EFI_PEI_SERVICES        **PeiServices,
+  IN EFI_PEI_MM_CONTROL_PPI  * This,
+  IN BOOLEAN                 Periodic OPTIONAL
+  )
+{
+  if (Periodic) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  return SmmClear ();
+}
+
+/**
+  This function is to install an SMM Control PPI
+  - <b>Introduction</b> \n
+    An API to install an instance of EFI_PEI_MM_CONTROL_PPI. This PPI provides a standard
+    way for other modules to trigger software SMIs.
+
+    @retval EFI_SUCCESS           - Ppi successfully started and installed.
+    @retval EFI_NOT_FOUND         - Ppi can't be found.
+    @retval EFI_OUT_OF_RESOURCES  - Ppi does not have enough resources to initialize the driver.
+**/
+EFI_STATUS
+EFIAPI
+PeiInstallSmmControlPpi (
+  VOID
+  )
+{
+  EFI_STATUS                      Status;
+  EFI_PEI_PPI_DESCRIPTOR          *PpiList;
+  SMM_CONTROL_PRIVATE_DATA        *SmmControlPrivate;
+
+  //
+  // Initialize private data
+  //
+  SmmControlPrivate  = AllocateZeroPool (sizeof (*SmmControlPrivate));
+  ASSERT (SmmControlPrivate != NULL);
+  if (SmmControlPrivate == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+  PpiList           = AllocateZeroPool (sizeof (*PpiList));
+  ASSERT (PpiList != NULL);
+  if (PpiList == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  SmmControlPrivate->Signature = SMM_CONTROL_PRIVATE_DATA_SIGNATURE;
+  SmmControlPrivate->Handle    = NULL;
+
+  SmmControlPrivate->SmmControl.Trigger  = Activate;
+  SmmControlPrivate->SmmControl.Clear    = Deactivate;
+
+  //
+  // Install PPI
+  //
+  PpiList->Flags  = (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST);
+  PpiList->Guid   = &gEfiPeiMmControlPpiGuid;
+  PpiList->Ppi    = &SmmControlPrivate->SmmControl;
+
+  Status          = PeiServicesInstallPpi (PpiList);
+  ASSERT_EFI_ERROR (Status);
+
+  // Unlike driver, do not disable SMIs as S3 resume continues
+  return EFI_SUCCESS;
+}
diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.inf b/Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.inf
new file mode 100644
index 000000000000..91c761366446
--- /dev/null
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/SmmControl/Library/PeiSmmControlLib/PeiSmmControlLib.inf
@@ -0,0 +1,34 @@
+## @file
+# Library description file for the SmmControl PPI
+#
+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010017
+  BASE_NAME                      = PeiSmmControlLib
+  FILE_GUID                      = F45D521A-C0DF-4283-A3CA-65AD01B479E7
+  VERSION_STRING                 = 1.0
+  MODULE_TYPE                    = PEIM
+  LIBRARY_CLASS                  = SmmControlLib
+
+[LibraryClasses]
+  IoLib
+  DebugLib
+  MemoryAllocationLib
+  PeiServicesLib
+
+[Packages]
+  MdePkg/MdePkg.dec
+  IntelSiliconPkg/IntelSiliconPkg.dec
+
+[Sources]
+  PeiSmmControlLib.c
+
+[Pcd]
+  gIntelSiliconPkgTokenSpaceGuid.PcdAcpiBaseAddress  ## CONSUMES
+
+[Ppis]
+  gEfiPeiMmControlPpiGuid                            ## PRODUCES
diff --git a/Silicon/Intel/IntelSiliconPkg/Include/Library/SmmControlLib.h b/Silicon/Intel/IntelSiliconPkg/Include/Library/SmmControlLib.h
new file mode 100644
index 000000000000..b532dd13f373
--- /dev/null
+++ b/Silicon/Intel/IntelSiliconPkg/Include/Library/SmmControlLib.h
@@ -0,0 +1,26 @@
+/** @file
+  This is to publish the SMM Control Ppi instance.
+
+  Copyright (c) 2019 - 2020, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#ifndef _SMM_CONTROL_LIB_H_
+#define _SMM_CONTROL_LIB_H_
+
+/**
+  This function is to install an SMM Control PPI
+  - <b>Introduction</b> \n
+    An API to install an instance of EFI_PEI_MM_CONTROL_PPI. This PPI provides a standard
+    way for other modules to trigger software SMIs.
+
+    @retval EFI_SUCCESS           - Ppi successfully started and installed.
+    @retval EFI_NOT_FOUND         - Ppi can't be found.
+    @retval EFI_OUT_OF_RESOURCES  - Ppi does not have enough resources to initialize the driver.
+**/
+EFI_STATUS
+EFIAPI
+PeiInstallSmmControlPpi (
+  VOID
+  );
+#endif
diff --git a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
index deefdc55b5d6..440c7d0255ce 100644
--- a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
+++ b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
@@ -35,6 +35,10 @@
   #
   SmmAccessLib|Include/Library/SmmAccessLib.h
 
+  ## @libraryclass Provides services to trigger SMI
+  #
+  SmmControlLib|Include/Library/SmmControlLib.h
+
   ## @libraryclass Provides services to access config block
   #
   ConfigBlockLib|Include/Library/ConfigBlockLib.h
-- 
2.37.2