[PATCH 1/4] MdeModulePkg: Add definitions for EDKII PEI NVME host controller PPI

[Hao Wu <hao.a.wu@intel.com>]

Introduces the below PPI:

struct EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI {
  EDKII_NVM_EXPRESS_HC_GET_MMIO_BAR       GetNvmeHcMmioBar;
  EDKII_NVM_EXPRESS_HC_GET_DEVICE_PATH    GetNvmeHcDevicePath;
};

The GetNvmeHcMmioBar service will provide the caller with the MMIO BAR
address of each NVMe HC within the system;

The GetNvmeHcDevicePath service will provide the caller with the device
path information of each NVMe HC.

Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
---
 MdeModulePkg/Include/Ppi/NvmExpressHostController.h | 97 ++++++++++++++++++++
 MdeModulePkg/MdeModulePkg.dec                       |  3 +
 2 files changed, 100 insertions(+)

diff --git a/MdeModulePkg/Include/Ppi/NvmExpressHostController.h b/MdeModulePkg/Include/Ppi/NvmExpressHostController.h
new file mode 100644
index 0000000000..de9ae4a59c
--- /dev/null
+++ b/MdeModulePkg/Include/Ppi/NvmExpressHostController.h
@@ -0,0 +1,97 @@
+/** @file
+
+  Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef _EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI_H_
+#define _EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI_H_
+
+#include <Protocol/DevicePath.h>
+
+///
+/// Global ID for the EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI.
+///
+#define EDKII_NVME_EXPRESS_HOST_CONTROLLER_PPI_GUID \
+  { \
+    0xcae3aa63, 0x676f, 0x4da3, { 0xbd, 0x50, 0x6c, 0xc5, 0xed, 0xde, 0x9a, 0xad } \
+  }
+
+//
+// Forward declaration for the EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI.
+//
+typedef struct _EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI  EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI;
+
+/**
+  Get the MMIO base address of NVM Express host controller.
+
+  @param[in]  PeiServices          Describes the list of possible PEI Services.
+  @param[in]  This                 The PPI instance pointer.
+  @param[in]  ControllerId         The ID of the NVM Express host controller.
+  @param[out] MmioBar              The MMIO base address of the controller.
+
+  @retval EFI_SUCCESS              The operation succeeds.
+  @retval EFI_INVALID_PARAMETER    The parameters are invalid.
+  @retval EFI_NOT_FOUND            The specified NVM Express host controller not
+                                   found.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_NVM_EXPRESS_HC_GET_MMIO_BAR) (
+  IN  EFI_PEI_SERVICES                         **PeiServices,
+  IN  EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI    *This,
+  IN  UINT8                                    ControllerId,
+  OUT UINTN                                    *MmioBar
+  );
+
+/**
+  Get the device path of NVM Express host controller.
+
+  @param[in]  PeiServices          Describes the list of possible PEI Services.
+  @param[in]  This                 The PPI instance pointer.
+  @param[in]  ControllerId         The ID of the NVM Express host controller.
+  @param[out] DevicePathLenth      The length of the device path in bytes specified
+                                   by DevicePath.
+  @param[out] DevicePath           The device path of NVM Express host controller.
+                                   The caller is responsible for freeing it.
+                                   This field re-uses EFI Device Path Protocol as
+                                   defined by Section 10.2 EFI Device Path Protocol
+                                   of UEFI 2.7 Specification.
+
+  @retval EFI_SUCCESS              The operation succeeds.
+  @retval EFI_INVALID_PARAMETER    The parameters are invalid.
+  @retval EFI_NOT_FOUND            The specified NVM Express host controller not
+                                   found.
+  @retval EFI_OUT_OF_RESOURCES     The operation fails due to lack of resources.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_NVM_EXPRESS_HC_GET_DEVICE_PATH) (
+  IN  EFI_PEI_SERVICES                         **PeiServices,
+  IN  EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI    *This,
+  IN  UINT8                                    ControllerId,
+  OUT UINTN                                    *DevicePathLenth,
+  OUT EFI_DEVICE_PATH_PROTOCOL                 **DevicePath
+  );
+
+//
+// This PPI contains a set of services to interact with the NVM Express host
+// controller.
+//
+struct _EDKII_NVM_EXPRESS_HOST_CONTROLLER_PPI {
+  EDKII_NVM_EXPRESS_HC_GET_MMIO_BAR       GetNvmeHcMmioBar;
+  EDKII_NVM_EXPRESS_HC_GET_DEVICE_PATH    GetNvmeHcDevicePath;
+};
+
+extern EFI_GUID gEdkiiPeiNvmExpressHostControllerPpiGuid;
+
+#endif
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 3802b6e0b8..8d7c97ee91 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -471,6 +471,9 @@
   ## Include/Ppi/PlatformSpecificResetHandler.h
   gEdkiiPlatformSpecificResetHandlerPpiGuid = { 0x75cf14ae, 0x3441, 0x49dc, { 0xaa, 0x10, 0xbb, 0x35, 0xa7, 0xba, 0x8b, 0xab } }
 
+  ## Include/Ppi/NvmExpressHostController.h
+  gEdkiiPeiNvmExpressHostControllerPpiGuid  = { 0xcae3aa63, 0x676f, 0x4da3, { 0xbd, 0x50, 0x6c, 0xc5, 0xed, 0xde, 0x9a, 0xad } }
+
 [Protocols]
   ## Load File protocol provides capability to load and unload EFI image into memory and execute it.
   #  Include/Protocol/LoadPe32Image.h
-- 
2.12.0.windows.1