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