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Fix bugs in the PCI bus driver to support SR-IOV.

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1. Expand the type of Offset in the _PCI_BAR structure from UINT8 to UINT16, because a VF BAR’s offset may be >= 0x100;
2. Enable ARI Capable Hierarchy for SR-IOV devices at earlier time because FirstVFOffset and VFStride of a SR-IOV device may change after its ARI Capable Hierarchy is set;
3. Change type of PcdSrIovSupport, PcdAriSupport, PcdMrIovSupport from FeatureFlag to [FixAtBuild, PcdDynamics], which allows SR-IOV/MR-IOV/ARI feature can be turn on/off dynamically, typically via a setup option.
4. Change PCI bus scan algorithm in PciScanBus() to prevent the case where some ARI extended functions may be skipped in the scan loop.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10644 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
rsun3
2010-07-13 01:58:47 +00:00
parent 78c0686bde
commit d40483911c
6 changed files with 295 additions and 234 deletions
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82
MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c
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@@ -1,7 +1,7 @@
/** @file
Internal library implementation for PCI Bus module.
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2010, 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
@@ -738,50 +738,43 @@ PciScanBus (
);
if (EFI_ERROR (Status)) {
if (Func == 0) {
//
// Skip sub functions, this is not a multi function device
//
Func = PCI_MAX_FUNC;
}
continue;
}
DEBUG((EFI_D_INFO, "Found DEV(%02d,%02d,%02d)\n", StartBusNumber, Device, Func ));
//
// Get the PCI device information
//
Status = PciSearchDevice (
Bridge,
&Pci,
StartBusNumber,
Device,
Func,
&PciDevice
);
ASSERT (!EFI_ERROR (Status));
PciAddress = EFI_PCI_ADDRESS (StartBusNumber, Device, Func, 0);
if (!IS_PCI_BRIDGE (&Pci)) {
//
// PCI bridges will be called later
// Here just need for PCI device or PCI to cardbus controller
// EfiPciBeforeChildBusEnumeration for PCI Device Node
//
PreprocessController (
PciDevice,
PciDevice->BusNumber,
PciDevice->DeviceNumber,
PciDevice->FunctionNumber,
EfiPciBeforeChildBusEnumeration
);
}
if (FeaturePcdGet (PcdPciBusHotplugDeviceSupport)) {
//
// Get the PCI device information
//
Status = PciSearchDevice (
Bridge,
&Pci,
StartBusNumber,
Device,
Func,
&PciDevice
);
ASSERT (!EFI_ERROR (Status));
PciAddress = EFI_PCI_ADDRESS (StartBusNumber, Device, Func, 0);
if (!IS_PCI_BRIDGE (&Pci)) {
//
// PCI bridges will be called later
// Here just need for PCI device or PCI to cardbus controller
// EfiPciBeforeChildBusEnumeration for PCI Device Node
//
PreprocessController (
PciDevice,
PciDevice->BusNumber,
PciDevice->DeviceNumber,
PciDevice->FunctionNumber,
EfiPciBeforeChildBusEnumeration
);
}
//
// For Pci Hotplug controller devcie only
//
@@ -976,18 +969,9 @@ PciScanBus (
} else {
//
// It is device. Check PCI IOV for Bus reservation
//
if (PciDevice == NULL) {
//
// No PciDevice found, conitue Scan
//
continue;
}
//
// Go through each function, just reserve the MAX ReservedBusNum for one device
//
if ((PciDevice->AriCapabilityOffset != 0) && ((FeaturePcdGet(PcdSrIovSupport)& EFI_PCI_IOV_POLICY_SRIOV) != 0)) {
if (PcdGetBool (PcdSrIovSupport) && PciDevice->SrIovCapabilityOffset != 0) {
if (TempReservedBusNum < PciDevice->ReservedBusNum) {
(*SubBusNumber) = (UINT8)((*SubBusNumber) + PciDevice->ReservedBusNum - TempReservedBusNum);