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author | Olivier Martin <olivier.martin@arm.com> | 2013-12-11 16:57:59 +0000 |
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committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-12-11 16:57:59 +0000 |
commit | 6fb4e772a0ad14399532201d1b9ecb811c9c7262 (patch) | |
tree | 34b26f08dd50189636d1e557e7ddc36057e78d42 /OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h | |
parent | 3bb56c062e9a57c575f2375a7078ac37e9a86dd5 (diff) | |
download | edk2-6fb4e772a0ad14399532201d1b9ecb811c9c7262.tar.gz edk2-6fb4e772a0ad14399532201d1b9ecb811c9c7262.tar.bz2 edk2-6fb4e772a0ad14399532201d1b9ecb811c9c7262.zip |
OvmfPkg/VirtioMmioDeviceLib: Implement VIRTIO_DEVICE_PROTOCOL for VirtIo Devices over MMIO
Why is the virtio-mmio implementation of the protocol a library,
instead of a driver binary?
The UEFI driver model would encourage to create a virtio-mmio driver
instead of a library. But the reasons why I created a library are:
- A virtio-mmio driver would imply an additional protocol that would
probably have a single attribute field:
typedef struct {
PHYSICAL_ADDRESS BaseAddress;
} VIRTIO_MMIO_DEVICE_PROTOCOL;
- There is no (easy) way to scan the available VirtIo devices on a
platform. So, the UEFI firmware for this platform would need a driver
to produce instances for every virtio devices it wants to expose in
UEFI. A single call to a helper library (ie: VirtioMmioDeviceLib)
make the porting easier.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
v5:
- typo fix in VirtioMmioInstallDevice() comment block
- plug MmioDevice leak in VirtioMmioUninstallDevice()
- return EFI_INVALID_PARAMETER in VirtioMmioGetQueueAddress() if
QueueAddress is NULL
- VirtioMmioSetQueueSize(): fix return value (it's a status code)
- VirtioMmioSetPageSize(): check against EFI_PAGE_SIZE with "if" plus
EFI_UNSUPPORTED, rather than ASSERT()
- VirtioMmioDeviceWrite(), VirtioMmioDeviceRead(): remove redundant
(FieldSize > 8) checks
- VirtioMmioDeviceLib.inf: drop UefiDriverEntryPoint library dependency
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14965 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h')
-rw-r--r-- | OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h new file mode 100644 index 0000000000..3e4e5606cc --- /dev/null +++ b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h @@ -0,0 +1,147 @@ +/** @file
+
+ Internal definitions for the VirtIo MMIO Device driver
+
+ Copyright (C) 2013, ARM Ltd
+
+ 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
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef _VIRTIO_MMIO_DEVICE_INTERNAL_H_
+#define _VIRTIO_MMIO_DEVICE_INTERNAL_H_
+
+#include <Protocol/VirtioDevice.h>
+
+#include <IndustryStandard/Virtio.h>
+
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/UefiLib.h>
+#include <Library/VirtioMmioDeviceLib.h>
+
+#define VIRTIO_MMIO_DEVICE_SIGNATURE SIGNATURE_32 ('V', 'M', 'I', 'O')
+
+typedef struct {
+ UINT32 Signature;
+ VIRTIO_DEVICE_PROTOCOL VirtioDevice;
+ PHYSICAL_ADDRESS BaseAddress;
+} VIRTIO_MMIO_DEVICE;
+
+#define VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE(Device) \
+ CR (Device, VIRTIO_MMIO_DEVICE, VirtioDevice, VIRTIO_MMIO_DEVICE_SIGNATURE)
+
+#define VIRTIO_CFG_WRITE(Device, Offset, Val) \
+ (MmioWrite32 (Device->BaseAddress + (Offset), Val))
+#define VIRTIO_CFG_READ(Device, Offset) \
+ (MmioRead32 (Device->BaseAddress + (Offset)))
+
+EFI_STATUS
+EFIAPI
+VirtioMmioDeviceRead (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN FieldOFfset,
+ IN UINTN FieldSize,
+ IN UINTN BufferSize,
+ OUT VOID* Buffer
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioDeviceWrite (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN FieldOffset,
+ IN UINTN FieldSize,
+ IN UINT64 Value
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioGetDeviceFeatures (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT32 *DeviceFeatures
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioGetQueueAddress (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT32 *QueueAddress
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioGetQueueSize (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT16 *QueueNumMax
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioGetDeviceStatus (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT8 *DeviceStatus
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetQueueSize (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT16 QueueSize
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetDeviceStatus (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT8 DeviceStatus
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetQueueNotify (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT16 QueueNotify
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetQueueSel (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT16 Sel
+ );
+
+EFI_STATUS
+VirtioMmioSetQueueAddress (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 Address
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetQueueAlignment (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 Alignment
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetPageSize (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 PageSize
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioSetGuestFeatures (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 Features
+ );
+
+#endif // _VIRTIO_MMIO_DEVICE_INTERNAL_H_
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