PciHostBridgeDxe driver needs PciHostBridgeLib implemented by platform to provide the root bridge related information and may call into PciHostBridgeLib when resource conflicts happen.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni <ruiyu...@intel.com> Cc: Feng Tian <feng.t...@intel.com> Cc: Jeff Fan <jeff....@intel.com> Cc: Michael Kinney <michael.d.kin...@intel.com> --- MdeModulePkg/Include/Library/PciHostBridgeLib.h | 97 +++++++++++++++++++++++++ MdeModulePkg/MdeModulePkg.dec | 6 +- 2 files changed, 102 insertions(+), 1 deletion(-) create mode 100644 MdeModulePkg/Include/Library/PciHostBridgeLib.h diff --git a/MdeModulePkg/Include/Library/PciHostBridgeLib.h b/MdeModulePkg/Include/Library/PciHostBridgeLib.h new file mode 100644 index 0000000..d2267ad --- /dev/null +++ b/MdeModulePkg/Include/Library/PciHostBridgeLib.h @@ -0,0 +1,97 @@ +/** @file + PCI Host Bridge Library consumed by PciHostBridgeDxe driver returning + the platform specific information about the PCI Host Bridge. + + Copyright (c) 2016, 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 _PCI_HOST_BRIDGE_LIB_H__ +#define _PCI_HOST_BRIDGE_LIB_H__ + +// +// (Base > Limit) indicates an aperture is not available. +// +typedef struct { + UINT64 Base; + UINT64 Limit; +} PCI_ROOT_BRIDGE_APERTURE; + +typedef struct { + UINT32 Segment; ///< Segment number. + UINT64 Supports; ///< Supported attributes. + ///< Refer to EFI_PCI_ATTRIBUTE_xxx used by GetAttributes() + ///< and SetAttributes() in EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL. + UINT64 Attributes; ///< Initial attributes. + ///< Refer to EFI_PCI_ATTRIBUTE_xxx used by GetAttributes() + ///< and SetAttributes() in EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL. + BOOLEAN DmaAbove4G; ///< DMA above 4GB memory. + ///< Set to TRUE when root bridge supports DMA above 4GB memory. + UINT64 AllocationAttributes; ///< Allocation attributes. + ///< Refer to EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM and + ///< EFI_PCI_HOST_BRIDGE_MEM64_DECODE used by GetAllocAttributes() + ///< in EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL. + PCI_ROOT_BRIDGE_APERTURE Bus; ///< Bus aperture which can be used by the root bridge. + PCI_ROOT_BRIDGE_APERTURE Io; ///< IO aperture which can be used by the root bridge. + PCI_ROOT_BRIDGE_APERTURE Mem; ///< MMIO aperture below 4GB which can be used by the root bridge. + PCI_ROOT_BRIDGE_APERTURE MemAbove4G; ///< MMIO aperture above 4GB which can be used by the root bridge. + PCI_ROOT_BRIDGE_APERTURE PMem; ///< Prefetchable MMIO aperture below 4GB which can be used by the root bridge. + PCI_ROOT_BRIDGE_APERTURE PMemAbove4G; ///< Prefetchable MMIO aperture above 4GB which can be used by the root bridge. + EFI_DEVICE_PATH_PROTOCOL *DevicePath; ///< Device path. +} PCI_ROOT_BRIDGE; + +/** + Return all the root bridge instances in an array. + + @param Count Return the count of root bridge instances. + + @return All the root bridge instances in an array. + The array should be passed into PciHostBridgeFreeRootBridges() + when it's not used. +**/ +PCI_ROOT_BRIDGE * +EFIAPI +PciHostBridgeGetRootBridges ( + UINTN *Count + ); + +/** + Free the root bridge instances array returned from PciHostBridgeGetRootBridges(). + + @param The root bridge instances array. + @param The count of the array. +**/ +VOID +EFIAPI +PciHostBridgeFreeRootBridges ( + PCI_ROOT_BRIDGE *Bridges, + UINTN Count + ); + +/** + Inform the platform that the resource conflict happens. + + @param HostBridgeHandle Handle of the Host Bridge. + @param Configuration Pointer to PCI I/O and PCI memory resource descriptors. + The Configuration contains the resources for all the + root bridges. The resource for each root bridge is + terminated with END descriptor and an additional END + is appended indicating the end of the entire resources. + The resource descriptor field values follow the description + in EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL.SubmitResources(). +**/ +VOID +EFIAPI +PciHostBridgeResourceConflict ( + EFI_HANDLE HostBridgeHandle, + VOID *Configuration + ); + +#endif diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec index 0d8aede..5c5a9ee 100644 --- a/MdeModulePkg/MdeModulePkg.dec +++ b/MdeModulePkg/MdeModulePkg.dec @@ -3,7 +3,7 @@ # It also provides the definitions(including PPIs/PROTOCOLs/GUIDs and library classes) # and libraries instances, which are used for those modules. # -# Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR> +# Copyright (c) 2007 - 2016, 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 that accompanies this distribution. # The full text of the license may be found at @@ -147,6 +147,10 @@ # IpmiLib|Include/Library/IpmiLib.h + ## @libraryclass Provides interfaces for platform to return root bridge information to PciHostBridgeDxe driver. + # + PciHostBridgeLib|Include/Library/PciHostBridgeLib.h + [Guids] ## MdeModule package token space guid # Include/Guid/MdeModulePkgTokenSpace.h -- 2.6.2.windows.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
