[PATCH 04/11] OvmfPkg/LsiScsiDxe: Probe PCI devices and look for LsiScsi


Gary Lin
 

Implement LsiScsiControllerSupported() to probe the PCI ID and look for
LSI 53C895A.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Signed-off-by: Gary Lin <glin@suse.com>
---
OvmfPkg/Include/IndustryStandard/LsiScsi.h | 20 +++++++++
OvmfPkg/LsiScsiDxe/LsiScsi.c | 48 +++++++++++++++++++++-
OvmfPkg/LsiScsiDxe/LsiScsiDxe.inf | 6 +++
3 files changed, 73 insertions(+), 1 deletion(-)
create mode 100644 OvmfPkg/Include/IndustryStandard/LsiScsi.h

diff --git a/OvmfPkg/Include/IndustryStandard/LsiScsi.h b/OvmfPkg/Include/IndustryStandard/LsiScsi.h
new file mode 100644
index 000000000000..c09e864a1f39
--- /dev/null
+++ b/OvmfPkg/Include/IndustryStandard/LsiScsi.h
@@ -0,0 +1,20 @@
+/** @file
+
+ Macros and type definitions for LSI 53C895A SCSI devices.
+
+ Copyright (C) 2020, SUSE LLC.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _LSI_SCSI_H_
+#define _LSI_SCSI_H_
+
+//
+// Device ID
+//
+#define LSI_LOGIC_PCI_VENDOR_ID 0x1000
+#define LSI_53C895A_PCI_DEVICE_ID 0x0012
+
+#endif // _LSI_SCSI_H_
diff --git a/OvmfPkg/LsiScsiDxe/LsiScsi.c b/OvmfPkg/LsiScsiDxe/LsiScsi.c
index 62daa3ab99bf..5bca85bd75eb 100644
--- a/OvmfPkg/LsiScsiDxe/LsiScsi.c
+++ b/OvmfPkg/LsiScsiDxe/LsiScsi.c
@@ -9,7 +9,12 @@

**/

+#include <IndustryStandard/LsiScsi.h>
+#include <IndustryStandard/Pci.h>
+#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
+#include <Protocol/PciIo.h>
+#include <Protocol/PciRootBridgeIo.h>
#include <Uefi/UefiSpec.h>

#include "LsiScsi.h"
@@ -31,7 +36,48 @@ LsiScsiControllerSupported (
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 == LSI_LOGIC_PCI_VENDOR_ID &&
+ Pci.Hdr.DeviceId == LSI_53C895A_PCI_DEVICE_ID) {
+ Status = EFI_SUCCESS;
+ } else {
+ Status = EFI_UNSUPPORTED;
+ }
+
+Done:
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiPciIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ return Status;
}

EFI_STATUS
diff --git a/OvmfPkg/LsiScsiDxe/LsiScsiDxe.inf b/OvmfPkg/LsiScsiDxe/LsiScsiDxe.inf
index 444ceb78e9ca..e86c626a61aa 100644
--- a/OvmfPkg/LsiScsiDxe/LsiScsiDxe.inf
+++ b/OvmfPkg/LsiScsiDxe/LsiScsiDxe.inf
@@ -22,7 +22,13 @@ [Sources]

[Packages]
MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec

[LibraryClasses]
+ BaseLib
+ UefiBootServicesTableLib
UefiDriverEntryPoint
UefiLib
+
+[Protocols]
+ gEfiPciIoProtocolGuid ## TO_START
--
2.25.1

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