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| author | Laszlo Ersek <lersek@redhat.com> | 2020-12-16 22:10:40 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-12-21 17:16:23 +0000 |
| commit | b55d6622d4f4d795d71e930da1fcda7c78a7fe96 (patch) | |
| tree | 51c7fd519a83ae90aa4ec61cbd6d56ecce0e2eec /OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | |
| parent | fbc3e1267a430a20e8909ae8a6dfe1b98de9b7bc (diff) | |
| download | edk2-b55d6622d4f4d795d71e930da1fcda7c78a7fe96.tar.gz edk2-b55d6622d4f4d795d71e930da1fcda7c78a7fe96.tar.bz2 edk2-b55d6622d4f4d795d71e930da1fcda7c78a7fe96.zip | |
OvmfPkg/VirtioFsDxe: DriverBinding: open VirtioDevice, install SimpleFs
Complete the Supported, Start, and Stop member functions of
EFI_DRIVER_BINDING_PROTOCOL sufficiently for exercising the UEFI driver
model:
- bind virtio-fs devices,
- produce placeholder EFI_SIMPLE_FILE_SYSTEM_PROTOCOL instances on them.
On the "TO_START" (= Virtio) side, the VirtioFsBindingSupported() function
verifies the Virtio subsystem ID for the virtio-fs device (decimal 26 --
see
<https://github.com/oasis-tcs/virtio-spec/blob/87fa6b5d8155/virtio-fs.tex>).
Beyond that, no actual Virtio setup is performed for now. Those bits are
going to be implemented later in this series.
On the "BY_START" (= UEFI filesystem) side, the VirtioFsOpenVolume()
function -- which is the sole EFI_SIMPLE_FILE_SYSTEM_PROTOCOL member
function -- is a stub; it always returns EFI_NO_MEDIA, for now.
The "CONNECT", "DISCONNECT", and "MAP -R" UEFI Shell commands can be used
to test this patch.
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20201216211125.19496-4-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Diffstat (limited to 'OvmfPkg/VirtioFsDxe/VirtioFsDxe.h')
| -rw-r--r-- | OvmfPkg/VirtioFsDxe/VirtioFsDxe.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h new file mode 100644 index 0000000000..287defd21f --- /dev/null +++ b/OvmfPkg/VirtioFsDxe/VirtioFsDxe.h @@ -0,0 +1,52 @@ +/** @file
+ Internal macro definitions, type definitions, and function declarations for
+ the Virtio Filesystem device driver.
+
+ Copyright (C) 2020, Red Hat, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef VIRTIO_FS_DXE_H_
+#define VIRTIO_FS_DXE_H_
+
+#include <Base.h> // SIGNATURE_64()
+#include <Library/DebugLib.h> // CR()
+#include <Protocol/SimpleFileSystem.h> // EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
+#include <Protocol/VirtioDevice.h> // VIRTIO_DEVICE_PROTOCOL
+
+#define VIRTIO_FS_SIG SIGNATURE_64 ('V', 'I', 'R', 'T', 'I', 'O', 'F', 'S')
+
+//
+// Main context structure, expressing an EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
+// interface on top of the Virtio Filesystem device.
+//
+typedef struct {
+ //
+ // Parts of this structure are initialized / torn down in various functions
+ // at various call depths. The table to the right should make it easier to
+ // track them.
+ //
+ // field init function init depth
+ // ----------- ------------------ ----------
+ UINT64 Signature; // DriverBindingStart 0
+ VIRTIO_DEVICE_PROTOCOL *Virtio; // DriverBindingStart 0
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFs; // DriverBindingStart 0
+} VIRTIO_FS;
+
+#define VIRTIO_FS_FROM_SIMPLE_FS(SimpleFsReference) \
+ CR (SimpleFsReference, VIRTIO_FS, SimpleFs, VIRTIO_FS_SIG);
+
+//
+// EFI_SIMPLE_FILE_SYSTEM_PROTOCOL member functions for the Virtio Filesystem
+// driver.
+//
+
+EFI_STATUS
+EFIAPI
+VirtioFsOpenVolume (
+ IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
+ OUT EFI_FILE_PROTOCOL **Root
+ );
+
+#endif // VIRTIO_FS_DXE_H_
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