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OvmfPkg/PciHostBridgeLibScan: create from PciHostBridgeLib

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Create an almost verbatim copy of the
"OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf" library instance.

The new PciHostBridgeLibScan instance will ultimately duplicate a
negligible amount of code from the original, and will be used by the Bhyve
and OvmfXen platforms.

List the new driver in "Maintainers.txt", in the "OvmfPkg: bhyve-related
modules" and "OvmfPkg: Xen-related modules" sections.

This patch should be reviewed with "git show --find-copies-harder".

Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien@xen.org>
Cc: Peter Grehan <grehan@freebsd.org>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Rebecca Cran <rebecca@bsdio.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2122
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20210526201446.12554-30-lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit is contained in:
Laszlo Ersek
2021-05-26 22:14:32 +02:00
committed by mergify[bot]
parent 32fef03563
commit e120c962f5
5 changed files with 675 additions and 0 deletions
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133
OvmfPkg/Library/PciHostBridgeLibScan/PciHostBridgeLib.c Normal file
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/** @file
OVMF's instance of the PCI Host Bridge Library.
Copyright (C) 2016-2021, Red Hat, Inc.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <IndustryStandard/Pci.h> // PCI_MAX_BUS
#include <IndustryStandard/Q35MchIch9.h> // INTEL_Q35_MCH_DEVIC...
#include <Library/BaseMemoryLib.h> // ZeroMem()
#include <Library/PcdLib.h> // PcdGet64()
#include <Library/PciHostBridgeLib.h> // PCI_ROOT_BRIDGE_APE...
#include <Library/PciHostBridgeUtilityLib.h> // PciHostBridgeUtilit...
#include <Protocol/PciHostBridgeResourceAllocation.h> // EFI_PCI_HOST_BRIDGE...
#include <Protocol/PciRootBridgeIo.h> // EFI_PCI_ATTRIBUTE_I...
#include "PciHostBridge.h"
STATIC PCI_ROOT_BRIDGE_APERTURE mNonExistAperture = { MAX_UINT64, 0 };
/**
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
)
{
UINT64 Attributes;
UINT64 AllocationAttributes;
PCI_ROOT_BRIDGE_APERTURE Io;
PCI_ROOT_BRIDGE_APERTURE Mem;
PCI_ROOT_BRIDGE_APERTURE MemAbove4G;
if (PcdGetBool (PcdPciDisableBusEnumeration)) {
return ScanForRootBridges (Count);
}
ZeroMem (&Io, sizeof (Io));
ZeroMem (&Mem, sizeof (Mem));
ZeroMem (&MemAbove4G, sizeof (MemAbove4G));
Attributes = EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO |
EFI_PCI_ATTRIBUTE_IDE_SECONDARY_IO |
EFI_PCI_ATTRIBUTE_ISA_IO_16 |
EFI_PCI_ATTRIBUTE_ISA_MOTHERBOARD_IO |
EFI_PCI_ATTRIBUTE_VGA_MEMORY |
EFI_PCI_ATTRIBUTE_VGA_IO_16 |
EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO_16;
AllocationAttributes = EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM;
if (PcdGet64 (PcdPciMmio64Size) > 0) {
AllocationAttributes |= EFI_PCI_HOST_BRIDGE_MEM64_DECODE;
MemAbove4G.Base = PcdGet64 (PcdPciMmio64Base);
MemAbove4G.Limit = PcdGet64 (PcdPciMmio64Base) +
PcdGet64 (PcdPciMmio64Size) - 1;
} else {
CopyMem (&MemAbove4G, &mNonExistAperture, sizeof (mNonExistAperture));
}
Io.Base = PcdGet64 (PcdPciIoBase);
Io.Limit = PcdGet64 (PcdPciIoBase) + (PcdGet64 (PcdPciIoSize) - 1);
Mem.Base = PcdGet64 (PcdPciMmio32Base);
Mem.Limit = PcdGet64 (PcdPciMmio32Base) + (PcdGet64 (PcdPciMmio32Size) - 1);
return PciHostBridgeUtilityGetRootBridges (
Count,
Attributes,
AllocationAttributes,
FALSE,
PcdGet16 (PcdOvmfHostBridgePciDevId) != INTEL_Q35_MCH_DEVICE_ID,
0,
PCI_MAX_BUS,
&Io,
&Mem,
&MemAbove4G,
&mNonExistAperture,
&mNonExistAperture
);
}
/**
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
)
{
PciHostBridgeUtilityFreeRootBridges (Bridges, 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
)
{
PciHostBridgeUtilityResourceConflict (Configuration);
}