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This driver implements the VIRTIO_DEVICE_PROTOCOL for non-transitional PCI devices, based on the virtio-1.0 specification (csprd05). Non-transitional means that it only binds QEMU's virtio-xxx-pci devices that receive the ",disable-legacy=on,disable-modern=off" properties on the QEMU command line. These devices have distinct PCI Device IDs from those that are bound by VirtioPciDeviceDxe. The central abstraction of this driver is the VIRTIO_1_0_CONFIG type. It is practically a "fat pointer" to a register block. The pointed-to register block - may or may not exist (the latter being mostly useful for virtio-1.0 devices that have no device-specific registers), - lives in one of the device's BARs, - lives in an IO or MMIO BAR, - lives at an offset relative to the BAR start, - has its size also maintained. Such VIRTIO_1_0_CONFIG "fat pointers" (i.e., the locations of the register blocks) are parsed from vendor capabilities that reside in the device's standard PCI capabilities list (in PCI config space). Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Jordan Justen <jordan.l.justen@intel.com>
41 lines
1.1 KiB
INI
41 lines
1.1 KiB
INI
## @file
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# A non-transitional driver for VirtIo 1.0 PCI devices.
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#
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# Copyright (C) 2016, Red Hat, Inc.
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#
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# This program and the accompanying materials are licensed and made available
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# under the terms and conditions of the BSD License which accompanies this
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# distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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##
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = Virtio10
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FILE_GUID = 0170F60C-1D40-4651-956D-F0BD9879D527
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MODULE_TYPE = UEFI_DRIVER
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VERSION_STRING = 1.0
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ENTRY_POINT = Virtio10EntryPoint
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[Sources]
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Virtio10.c
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[Packages]
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MdePkg/MdePkg.dec
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OvmfPkg/OvmfPkg.dec
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[LibraryClasses]
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BaseMemoryLib
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DebugLib
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MemoryAllocationLib
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UefiBootServicesTableLib
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UefiDriverEntryPoint
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UefiLib
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[Protocols]
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gEfiPciIoProtocolGuid ## TO_START
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gVirtioDeviceProtocolGuid ## BY_START
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