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OvmfPkg/IndustryStandard: define PCI Capabilities for QEMU's PCI Bridges

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QEMU has recently gained the ability to provide various hints about its
PCI bridges. The hints take the form of vendor-specific PCI capabilities.
Define macros and types under "OvmfPkg/Include/IndustryStandard" to
describe these capabilities.

The definitions correspond to "docs/pcie_pci_bridge.txt" in the QEMU tree.
Said documentation was added in the last commit of the following series:

  a35fe226558a hw/pci: introduce pcie-pci-bridge device
  70e1ee59bb94 hw/pci: introduce bridge-only vendor-specific capability to
               provide some hints to firmware
  226263fb5cda hw/pci: add QEMU-specific PCI capability to the Generic PCI
               Express Root Port
  c1800a162765 docs: update documentation considering PCIE-PCI bridge

We are going to parse the Resource Reservation Capability in
OvmfPkg/PciHotPlugInitDxe, and return the reservation requests to
PciBusDxe.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Laszlo Ersek
2017-09-21 11:38:47 +02:00
parent 8844f15d33
commit bdf73b57f2
1 changed files with 60 additions and 0 deletions
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OvmfPkg/Include/IndustryStandard/QemuPciBridgeCapabilities.h Normal file
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/** @file
Macro and type definitions for QEMU's Red Hat vendor-specific PCI
capabilities that provide various hints about PCI Bridges.
Refer to "docs/pcie_pci_bridge.txt" in the QEMU source directory.
Copyright (C) 2017, Red Hat, Inc.
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 __QEMU_PCI_BRIDGE_CAPABILITIES_H__
#define __QEMU_PCI_BRIDGE_CAPABILITIES_H__
#include <IndustryStandard/Pci23.h>
//
// The hints apply to PCI Bridges whose PCI_DEVICE_INDEPENDENT_REGION.VendorId
// equals the following value.
//
#define QEMU_PCI_BRIDGE_VENDOR_ID_REDHAT 0x1B36
//
// Common capability header for all hints.
//
#pragma pack (1)
typedef struct {
EFI_PCI_CAPABILITY_VENDOR_HDR VendorHdr;
UINT8 Type;
} QEMU_PCI_BRIDGE_CAPABILITY_HDR;
#pragma pack ()
//
// Values defined for QEMU_PCI_BRIDGE_CAPABILITY_HDR.Type.
//
#define QEMU_PCI_BRIDGE_CAPABILITY_TYPE_RESOURCE_RESERVATION 0x01
//
// PCI Resource Reservation structure for when
// QEMU_PCI_BRIDGE_CAPABILITY_HDR.Type equals
// QEMU_PCI_BRIDGE_CAPABILITY_TYPE_RESOURCE_RESERVATION.
//
#pragma pack (1)
typedef struct {
QEMU_PCI_BRIDGE_CAPABILITY_HDR BridgeHdr;
UINT32 BusNumbers;
UINT64 Io;
UINT32 NonPrefetchable32BitMmio;
UINT32 Prefetchable32BitMmio;
UINT64 Prefetchable64BitMmio;
} QEMU_PCI_BRIDGE_CAPABILITY_RESOURCE_RESERVATION;
#pragma pack ()
#endif