b55d6622d4
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>
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/** @file
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Definitions from the VirtIo 1.0 specification (csprd05).
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Copyright (C) 2016, Red Hat, Inc.
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Copyright (C) 2017, AMD, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _VIRTIO_1_0_H_
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#define _VIRTIO_1_0_H_
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#include <IndustryStandard/Pci23.h>
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#include <IndustryStandard/Virtio095.h>
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//
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// Subsystem Device IDs (to be) introduced in VirtIo 1.0
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//
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#define VIRTIO_SUBSYSTEM_GPU_DEVICE 16
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//
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// Subsystem Device IDs from the VirtIo spec at git commit 87fa6b5d8155;
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// <https://github.com/oasis-tcs/virtio-spec/tree/87fa6b5d8155>.
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//
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#define VIRTIO_SUBSYSTEM_FILESYSTEM 26
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//
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// Structures for parsing the VirtIo 1.0 specific PCI capabilities from the
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// config space
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//
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#pragma pack (1)
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typedef struct {
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EFI_PCI_CAPABILITY_VENDOR_HDR VendorHdr;
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UINT8 ConfigType; // Identifies the specific VirtIo 1.0 config structure
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UINT8 Bar; // The BAR that contains the structure
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UINT8 Padding[3];
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UINT32 Offset; // Offset within Bar until the start of the structure
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UINT32 Length; // Length of the structure
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} VIRTIO_PCI_CAP;
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#pragma pack ()
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//
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// Values for the VIRTIO_PCI_CAP.ConfigType field
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//
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#define VIRTIO_PCI_CAP_COMMON_CFG 1 // Common configuration
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#define VIRTIO_PCI_CAP_NOTIFY_CFG 2 // Notifications
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#define VIRTIO_PCI_CAP_DEVICE_CFG 4 // Device specific configuration
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//
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// Structure pointed-to by Bar and Offset in VIRTIO_PCI_CAP when ConfigType is
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// VIRTIO_PCI_CAP_COMMON_CFG
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//
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#pragma pack (1)
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typedef struct {
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UINT32 DeviceFeatureSelect;
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UINT32 DeviceFeature;
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UINT32 DriverFeatureSelect;
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UINT32 DriverFeature;
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UINT16 MsixConfig;
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UINT16 NumQueues;
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UINT8 DeviceStatus;
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UINT8 ConfigGeneration;
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UINT16 QueueSelect;
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UINT16 QueueSize;
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UINT16 QueueMsixVector;
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UINT16 QueueEnable;
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UINT16 QueueNotifyOff;
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UINT64 QueueDesc;
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UINT64 QueueAvail;
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UINT64 QueueUsed;
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} VIRTIO_PCI_COMMON_CFG;
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#pragma pack ()
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//
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// VirtIo 1.0 device status bits
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//
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#define VSTAT_FEATURES_OK BIT3
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//
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// VirtIo 1.0 reserved (device-independent) feature bits
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//
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#define VIRTIO_F_VERSION_1 BIT32
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#define VIRTIO_F_IOMMU_PLATFORM BIT33
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#endif // _VIRTIO_1_0_H_
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