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MdeModulePkg/Bus/Pci/PciBusDxe: Support PCIe Resizable BAR Capability

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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=313

Add PcdPcieResizableBarSupport to enable/disable PCIe Resizable
BAR Capability fearture.
Program the Resizable BAR Register if the device suports PCIe Resizable
BAR Capability and PcdPcieResizableBarSupport is TRUE.

Cc: Ray Ni <ray.ni@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Heng Luo <heng.luo@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Luo, Heng
2021-01-04 14:59:54 +08:00
committed by mergify[bot]
parent 42fe8ca453
commit 0785c619a5
7 changed files with 241 additions and 20 deletions
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27
MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
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@@ -1,7 +1,7 @@
/** @file
PCI emumeration support functions implementation for PCI Bus module.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -2426,6 +2426,31 @@ CreatePciIoDevice (
}
}
PciIoDevice->ResizableBarOffset = 0;
if (PcdGetBool (PcdPcieResizableBarSupport)) {
Status = LocatePciExpressCapabilityRegBlock (
PciIoDevice,
PCI_EXPRESS_EXTENDED_CAPABILITY_RESIZABLE_BAR_ID,
&PciIoDevice->ResizableBarOffset,
NULL
);
if (!EFI_ERROR (Status)) {
PCI_EXPRESS_EXTENDED_CAPABILITIES_RESIZABLE_BAR_CONTROL ResizableBarControl;
UINT32 Offset;
Offset = PciIoDevice->ResizableBarOffset + sizeof (PCI_EXPRESS_EXTENDED_CAPABILITIES_HEADER)
+ sizeof (PCI_EXPRESS_EXTENDED_CAPABILITIES_RESIZABLE_BAR_CAPABILITY),
PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint8,
Offset,
sizeof (PCI_EXPRESS_EXTENDED_CAPABILITIES_RESIZABLE_BAR_CONTROL),
&ResizableBarControl
);
PciIoDevice->ResizableBarNumber = ResizableBarControl.Bits.ResizableBarNumber;
PciProgramResizableBar (PciIoDevice, PciResizableBarMax);
}
}
//
// Initialize the reserved resource list
//