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OvmfPkg/PvScsiDxe: Probe PCI devices and look for PvScsi

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PvScsiControllerSupported() is called on handles passed in
by the ConnectController() boot service and if the handle is the
PVSCSI controller, the function would return success. A success
return value will attach our driver to the device.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200328200100.60786-5-liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
This commit is contained in:
Liran Alon
2020-03-28 23:00:47 +03:00
committed by mergify[bot]
parent 419b30d642
commit a9f9d5cf56
3 changed files with 74 additions and 1 deletions
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49
OvmfPkg/PvScsiDxe/PvScsi.c
View File

@@ -9,7 +9,11 @@
**/
#include <IndustryStandard/Pci.h>
#include <IndustryStandard/PvScsi.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/PciIo.h>
#include <Uefi/UefiSpec.h>
//
@@ -31,7 +35,50 @@ PvScsiDriverBindingSupported (
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
return EFI_UNSUPPORTED;
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
PCI_TYPE00 Pci;
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
(VOID **)&PciIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0,
sizeof (Pci) / sizeof (UINT32),
&Pci
);
if (EFI_ERROR (Status)) {
goto Done;
}
if ((Pci.Hdr.VendorId != PCI_VENDOR_ID_VMWARE) ||
(Pci.Hdr.DeviceId != PCI_DEVICE_ID_VMWARE_PVSCSI)) {
Status = EFI_UNSUPPORTED;
goto Done;
}
Status = EFI_SUCCESS;
Done:
gBS->CloseProtocol (
ControllerHandle,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return Status;
}
STATIC