mirror of https://github.com/acidanthera/audk.git
OvmfPkg: introduce virtio-blk driver
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://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13798 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
parent
04cabbc0a1
commit
fd51d75991
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@ -407,6 +407,7 @@
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}
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OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.inf
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OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
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OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf {
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<LibraryClasses>
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PlatformFvbLib|OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.inf
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@ -180,6 +180,7 @@ INF MdeModulePkg/Universal/Metronome/Metronome.inf
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INF PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
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INF OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.inf
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INF OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
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INF OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
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INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
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@ -414,6 +414,7 @@
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}
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OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.inf
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OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
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OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf {
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<LibraryClasses>
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PlatformFvbLib|OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.inf
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@ -180,6 +180,7 @@ INF MdeModulePkg/Universal/Metronome/Metronome.inf
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INF PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
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INF OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.inf
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INF OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
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INF OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
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INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
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@ -412,6 +412,7 @@
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}
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OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.inf
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OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
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OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf {
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<LibraryClasses>
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PlatformFvbLib|OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.inf
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@ -180,6 +180,7 @@ INF MdeModulePkg/Universal/Metronome/Metronome.inf
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INF PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
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INF OvmfPkg/BlockMmioToBlockIoDxe/BlockIo.inf
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INF OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
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INF OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
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INF MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
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@ -0,0 +1,176 @@
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/** @file
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Type and macro definitions corresponding to the virtio-0.9.5 specification.
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Copyright (C) 2012, Red Hat, Inc.
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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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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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#include <Base.h>
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//
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// Data in the communication area is defined as packed and accessed as
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// volatile.
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//
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// Some structures contain arrays with dynamically determined size. In such
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// cases the array and its sibling fields are replaced with pointers.
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//
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// All indices (variables and fields named *Idx) are free-running and wrap
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// around after 0xFFFF. The queue size reported by the host is always an
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// integral power of 2, not greater than 32768. Actual array indices are
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// consistently calculated by taking the remainder of a given Idx object modulo
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// QueueSize. Since 0x10000 is an integral multiple of the QueueSize, UINT16
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// wraparound is a correct wraparound modulo QueueSize too (it doesn't offset
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// the remainder class).
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//
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// virtio-0.9.5, 2.3.4 Available Ring
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//
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#define VRING_AVAIL_F_NO_INTERRUPT BIT0
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typedef struct {
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volatile UINT16 *Flags;
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volatile UINT16 *Idx;
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volatile UINT16 *Ring; // QueueSize elements
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volatile UINT16 *UsedEvent; // unused as per negotiation
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} VRING_AVAIL;
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//
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// virtio-0.9.5, 2.3.5 Used Ring
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//
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#define VRING_USED_F_NO_NOTIFY BIT0
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#pragma pack(1)
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typedef struct {
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UINT32 Id;
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UINT32 Len;
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} VRING_USED_ELEM;
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#pragma pack()
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typedef struct {
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volatile UINT16 *Flags;
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volatile UINT16 *Idx;
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volatile VRING_USED_ELEM *UsedElem; // QueueSize elements
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volatile UINT16 *AvailEvent; // unused as per negotiation
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} VRING_USED;
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//
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// virtio-0.9.5, 2.3.2 Descriptor Table
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//
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#define VRING_DESC_F_NEXT BIT0 // more descriptors in this request
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#define VRING_DESC_F_WRITE BIT1 // buffer to be written *by the host*
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#define VRING_DESC_F_INDIRECT BIT2 // unused
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#pragma pack(1)
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typedef struct {
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UINT64 Addr;
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UINT32 Len;
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UINT16 Flags;
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UINT16 Next;
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} VRING_DESC;
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#pragma pack()
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typedef struct {
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UINTN NumPages;
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VOID *Base; // deallocate only this field
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volatile VRING_DESC *Desc; // QueueSize elements
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VRING_AVAIL Avail;
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VRING_USED Used;
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UINT16 QueueSize;
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} VRING;
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//
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// virtio-0.9.5, 2.2.2 Virtio Header -- no MSI-X
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// virtio-0.9.5, Appendix D
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//
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#pragma pack(1)
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typedef struct {
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UINT32 VhdrDeviceFeatureBits;
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UINT32 VhdrGuestFeatureBits;
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UINT32 VhdrQueueAddress;
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UINT16 VhdrQueueSize;
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UINT16 VhdrQueueSelect;
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UINT16 VhdrQueueNotify;
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UINT8 VhdrDeviceStatus;
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UINT8 VhdrISR;
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UINT64 VhdrCapacity;
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UINT32 VhdrSizeMax;
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UINT32 VhdrSegMax;
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UINT16 VhdrCylinders;
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UINT8 VhdrHeads;
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UINT8 VhdrSectors;
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UINT32 VhdrBlkSize;
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} VBLK_HDR;
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#pragma pack()
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#define OFFSET_OF_VHDR(Field) ((UINTN)(UINT8 *)&((VBLK_HDR *) 0)->Field)
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#define SIZE_OF_VHDR(Field) (sizeof ((VBLK_HDR *) 0)->Field)
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//
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// virtio-0.9.5, 2.2.2.1 Device Status
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//
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#define VSTAT_ACK BIT0
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#define VSTAT_DRIVER BIT1
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#define VSTAT_DRIVER_OK BIT2
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#define VSTAT_FAILED BIT7
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//
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// virtio-0.9.5, Appendix B: Reserved (Device-Independent) Feature Bits
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//
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#define VIRTIO_F_NOTIFY_ON_EMPTY BIT24
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#define VIRTIO_F_RING_INDIRECT_DESC BIT28
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#define VIRTIO_F_RING_EVENT_IDX BIT29
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//
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// virtio-0.9.5, Appendix D: Block Device
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//
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#define VIRTIO_BLK_F_BARRIER BIT0
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#define VIRTIO_BLK_F_SIZE_MAX BIT1
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#define VIRTIO_BLK_F_SEG_MAX BIT2
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#define VIRTIO_BLK_F_GEOMETRY BIT4
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#define VIRTIO_BLK_F_RO BIT5
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#define VIRTIO_BLK_F_BLK_SIZE BIT6 // treated as "logical block size" in
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// practice; actual host side implementation
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// negotiates "optimal" block size
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// separately
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#define VIRTIO_BLK_F_SCSI BIT7
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#define VIRTIO_BLK_F_FLUSH BIT9 // identical to "write cache enabled"
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//
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// We keep the status byte separate from the rest of the virtio-blk request
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// header. See description of historical scattering at the end of Appendix D:
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// we're going to put the status byte in a separate VRING_DESC.
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//
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#pragma pack(1)
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typedef struct {
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UINT32 Type;
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UINT32 IoPrio;
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UINT64 Sector;
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} VIRTIO_BLK_REQ;
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#pragma pack()
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#define VIRTIO_BLK_T_IN 0x00000000
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#define VIRTIO_BLK_T_OUT 0x00000001
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#define VIRTIO_BLK_T_SCSI_CMD 0x00000002
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#define VIRTIO_BLK_T_SCSI_CMD_OUT 0x00000003
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#define VIRTIO_BLK_T_FLUSH 0x00000004
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#define VIRTIO_BLK_T_FLUSH_OUT 0x00000005
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#define VIRTIO_BLK_T_BARRIER BIT31
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#define VIRTIO_BLK_S_OK 0x00
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#define VIRTIO_BLK_S_IOERR 0x01
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#define VIRTIO_BLK_S_UNSUPP 0x02
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,293 @@
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/** @file
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Internal definitions for the virtio-blk driver, which produces Block I/O
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Protocol instances for virtio-blk devices.
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Copyright (C) 2012, Red Hat, Inc.
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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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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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#include <Protocol/BlockIo.h>
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#include <Protocol/ComponentName.h>
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#include <Protocol/DriverBinding.h>
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#include <Protocol/PciIo.h>
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#include "Virtio.h"
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#define VBLK_SIG SIGNATURE_32 ('V', 'B', 'L', 'K')
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typedef struct {
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//
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// Parts of this structure are initialized / torn down in various functions
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// at various call depths. The table to the right should make it easier to
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// track them.
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//
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// field init function init dpth
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// ---------------------- ------------------ ---------
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UINT32 Signature; // DriverBindingStart 0
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EFI_PCI_IO_PROTOCOL *PciIo; // DriverBindingStart 0
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UINT64 OriginalPciAttributes; // DriverBindingStart 0
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VRING Ring; // VirtioRingInit 2
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EFI_BLOCK_IO_PROTOCOL BlockIo; // VirtioBlkInit 1
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EFI_BLOCK_IO_MEDIA BlockIoMedia; // VirtioBlkInit 1
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} VBLK_DEV;
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#define VIRTIO_BLK_FROM_BLOCK_IO(BlockIoPointer) \
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CR (BlockIoPointer, VBLK_DEV, BlockIo, VBLK_SIG)
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/**
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Device probe function for this driver.
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The DXE core calls this function for any given device in order to see if the
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driver can drive the device.
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Specs relevant in the general sense:
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- UEFI Spec 2.3.1 + Errata C:
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- 6.3 Protocol Handler Services -- for accessing the underlying device
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- 10.1 EFI Driver Binding Protocol -- for exporting ourselves
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- Driver Writer's Guide for UEFI 2.3.1 v1.01:
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- 5.1.3.4 OpenProtocol() and CloseProtocol() -- for accessing the
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underlying device
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- 9 Driver Binding Protocol -- for exporting ourselves
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Specs relevant in the specific sense:
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- UEFI Spec 2.3.1 + Errata C, 13.4 EFI PCI I/O Protocol
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- Driver Writer's Guide for UEFI 2.3.1 v1.01, 18 PCI Driver Design
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Guidelines, 18.3 PCI drivers.
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@param[in] This The EFI_DRIVER_BINDING_PROTOCOL object
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incorporating this driver (independently of
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any device).
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@param[in] DeviceHandle The device to probe.
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@param[in] RemainingDevicePath Relevant only for bus drivers, ignored.
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@retval EFI_SUCCESS The driver supports the device being probed.
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@retval EFI_UNSUPPORTED Based on virtio-blk PCI discovery, we do not support
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the device.
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@return Error codes from the OpenProtocol() boot service or
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the PciIo protocol.
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**/
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EFI_STATUS
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EFIAPI
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VirtioBlkDriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE DeviceHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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);
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/**
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After we've pronounced support for a specific device in
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DriverBindingSupported(), we start managing said device (passed in by the
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Driver Exeuction Environment) with the following service.
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See DriverBindingSupported() for specification references.
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@param[in] This The EFI_DRIVER_BINDING_PROTOCOL object
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incorporating this driver (independently of
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any device).
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@param[in] DeviceHandle The supported device to drive.
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@param[in] RemainingDevicePath Relevant only for bus drivers, ignored.
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@retval EFI_SUCCESS Driver instance has been created and
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initialized for the virtio-blk PCI device, it
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is now accessibla via EFI_BLOCK_IO_PROTOCOL.
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@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
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@return Error codes from the OpenProtocol() boot
|
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service, the PciIo protocol, VirtioBlkInit(),
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or the InstallProtocolInterface() boot service.
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**/
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EFI_STATUS
|
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EFIAPI
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VirtioBlkDriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
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IN EFI_HANDLE DeviceHandle,
|
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
|
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);
|
||||
|
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|
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/**
|
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Stop driving a virtio-blk device and remove its BlockIo interface.
|
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|
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This function replays the success path of DriverBindingStart() in reverse.
|
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The host side virtio-blk device is reset, so that the OS boot loader or the
|
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OS may reinitialize it.
|
||||
|
||||
@param[in] This The EFI_DRIVER_BINDING_PROTOCOL object
|
||||
incorporating this driver (independently of any
|
||||
device).
|
||||
|
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@param[in] DeviceHandle Stop driving this device.
|
||||
|
||||
@param[in] NumberOfChildren Since this function belongs to a device driver
|
||||
only (as opposed to a bus driver), the caller
|
||||
environment sets NumberOfChildren to zero, and
|
||||
we ignore it.
|
||||
|
||||
@param[in] ChildHandleBuffer Ignored (corresponding to NumberOfChildren).
|
||||
|
||||
**/
|
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|
||||
EFI_STATUS
|
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EFIAPI
|
||||
VirtioBlkDriverBindingStop (
|
||||
IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
||||
IN EFI_HANDLE DeviceHandle,
|
||||
IN UINTN NumberOfChildren,
|
||||
IN EFI_HANDLE *ChildHandleBuffer
|
||||
);
|
||||
|
||||
|
||||
//
|
||||
// UEFI Spec 2.3.1 + Errata C, 12.8 EFI Block I/O Protocol
|
||||
// Driver Writer's Guide for UEFI 2.3.1 v1.01,
|
||||
// 24.2 Block I/O Protocol Implementations
|
||||
//
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VirtioBlkReset (
|
||||
IN EFI_BLOCK_IO_PROTOCOL *This,
|
||||
IN BOOLEAN ExtendedVerification
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
|
||||
ReadBlocks() operation for virtio-blk.
|
||||
|
||||
See
|
||||
- UEFI Spec 2.3.1 + Errata C, 12.8 EFI Block I/O Protocol, 12.8 EFI Block I/O
|
||||
Protocol, EFI_BLOCK_IO_PROTOCOL.ReadBlocks().
|
||||
- Driver Writer's Guide for UEFI 2.3.1 v1.01, 24.2.2. ReadBlocks() and
|
||||
ReadBlocksEx() Implementation.
|
||||
|
||||
Parameter checks and conformant return values are implemented in
|
||||
VerifyReadWriteRequest() and SynchronousRequest().
|
||||
|
||||
A zero BufferSize doesn't seem to be prohibited, so do nothing in that case,
|
||||
successfully.
|
||||
|
||||
**/
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VirtioBlkReadBlocks (
|
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IN EFI_BLOCK_IO_PROTOCOL *This,
|
||||
IN UINT32 MediaId,
|
||||
IN EFI_LBA Lba,
|
||||
IN UINTN BufferSize,
|
||||
OUT VOID *Buffer
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
|
||||
WriteBlocks() operation for virtio-blk.
|
||||
|
||||
See
|
||||
- UEFI Spec 2.3.1 + Errata C, 12.8 EFI Block I/O Protocol, 12.8 EFI Block I/O
|
||||
Protocol, EFI_BLOCK_IO_PROTOCOL.WriteBlocks().
|
||||
- Driver Writer's Guide for UEFI 2.3.1 v1.01, 24.2.3 WriteBlocks() and
|
||||
WriteBlockEx() Implementation.
|
||||
|
||||
Parameter checks and conformant return values are implemented in
|
||||
VerifyReadWriteRequest() and SynchronousRequest().
|
||||
|
||||
A zero BufferSize doesn't seem to be prohibited, so do nothing in that case,
|
||||
successfully.
|
||||
|
||||
**/
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VirtioBlkWriteBlocks (
|
||||
IN EFI_BLOCK_IO_PROTOCOL *This,
|
||||
IN UINT32 MediaId,
|
||||
IN EFI_LBA Lba,
|
||||
IN UINTN BufferSize,
|
||||
IN VOID *Buffer
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
|
||||
FlushBlocks() operation for virtio-blk.
|
||||
|
||||
See
|
||||
- UEFI Spec 2.3.1 + Errata C, 12.8 EFI Block I/O Protocol, 12.8 EFI Block I/O
|
||||
Protocol, EFI_BLOCK_IO_PROTOCOL.FlushBlocks().
|
||||
- Driver Writer's Guide for UEFI 2.3.1 v1.01, 24.2.4 FlushBlocks() and
|
||||
FlushBlocksEx() Implementation.
|
||||
|
||||
If the underlying virtio-blk device doesn't support flushing (ie.
|
||||
write-caching), then this function should not be called by higher layers,
|
||||
according to EFI_BLOCK_IO_MEDIA characteristics set in VirtioBlkInit().
|
||||
Should they do nonetheless, we do nothing, successfully.
|
||||
|
||||
**/
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VirtioBlkFlushBlocks (
|
||||
IN EFI_BLOCK_IO_PROTOCOL *This
|
||||
);
|
||||
|
||||
|
||||
//
|
||||
// The purpose of the following scaffolding (EFI_COMPONENT_NAME_PROTOCOL and
|
||||
// EFI_COMPONENT_NAME2_PROTOCOL implementation) is to format the driver's name
|
||||
// in English, for display on standard console devices. This is recommended for
|
||||
// UEFI drivers that follow the UEFI Driver Model. Refer to the Driver Writer's
|
||||
// Guide for UEFI 2.3.1 v1.01, 11 UEFI Driver and Controller Names.
|
||||
//
|
||||
// Device type names ("Virtio Block Device") are not formatted because the
|
||||
// driver supports only that device type. Therefore the driver name suffices
|
||||
// for unambiguous identification.
|
||||
//
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VirtioBlkGetDriverName (
|
||||
IN EFI_COMPONENT_NAME_PROTOCOL *This,
|
||||
IN CHAR8 *Language,
|
||||
OUT CHAR16 **DriverName
|
||||
);
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VirtioBlkGetDeviceName (
|
||||
IN EFI_COMPONENT_NAME_PROTOCOL *This,
|
||||
IN EFI_HANDLE DeviceHandle,
|
||||
IN EFI_HANDLE ChildHandle,
|
||||
IN CHAR8 *Language,
|
||||
OUT CHAR16 **ControllerName
|
||||
);
|
||||
|
|
@ -0,0 +1,40 @@
|
|||
## @file
|
||||
# This driver produces Block I/O Protocol instances for virtio-blk devices.
|
||||
#
|
||||
# Copyright (C) 2012, Red Hat, Inc.
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
##
|
||||
|
||||
[Defines]
|
||||
INF_VERSION = 0x00010005
|
||||
BASE_NAME = VirtioBlkDxe
|
||||
FILE_GUID = 11D92DFB-3CA9-4F93-BA2E-4780ED3E03B5
|
||||
MODULE_TYPE = UEFI_DRIVER
|
||||
VERSION_STRING = 1.0
|
||||
ENTRY_POINT = VirtioBlkEntryPoint
|
||||
|
||||
[Sources]
|
||||
VirtioBlk.c
|
||||
|
||||
[Packages]
|
||||
MdePkg/MdePkg.dec
|
||||
|
||||
[LibraryClasses]
|
||||
BaseMemoryLib
|
||||
DebugLib
|
||||
MemoryAllocationLib
|
||||
UefiBootServicesTableLib
|
||||
UefiDriverEntryPoint
|
||||
UefiLib
|
||||
|
||||
[Protocols]
|
||||
gEfiBlockIoProtocolGuid ## BY_START
|
||||
gEfiPciIoProtocolGuid ## TO_START
|
||||
Loading…
Reference in New Issue