7d8a04e9d2
This causes the device to forget about the request/completion rings. We allocated said rings in EfiBootServicesData type memory, and code executing after ExitBootServices() is permitted to overwrite it. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567 Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Liran Alon <liran.alon@oracle.com> Message-Id: <20200328200100.60786-17-liran.alon@oracle.com> Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/** @file
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Internal definitions for the PVSCSI driver, which produces Extended SCSI
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Pass Thru Protocol instances for pvscsi devices.
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Copyright (C) 2020, Oracle and/or its affiliates.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __PVSCSI_DXE_H_
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#define __PVSCSI_DXE_H_
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#include <Library/DebugLib.h>
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#include <Protocol/ScsiPassThruExt.h>
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typedef struct {
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EFI_PHYSICAL_ADDRESS DeviceAddress;
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VOID *Mapping;
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} PVSCSI_DMA_DESC;
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typedef struct {
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PVSCSI_RINGS_STATE *RingState;
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PVSCSI_DMA_DESC RingStateDmaDesc;
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PVSCSI_RING_REQ_DESC *RingReqs;
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PVSCSI_DMA_DESC RingReqsDmaDesc;
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PVSCSI_RING_CMP_DESC *RingCmps;
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PVSCSI_DMA_DESC RingCmpsDmaDesc;
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} PVSCSI_RING_DESC;
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typedef struct {
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//
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// As EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET.SenseDataLength is defined
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// as UINT8, defining here SenseData size to MAX_UINT8 will guarantee it
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// cannot overflow when passed to device.
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//
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UINT8 SenseData[MAX_UINT8];
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//
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// This size of the data is arbitrarily chosen.
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// It seems to be sufficient for all I/O requests sent through
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// EFI_SCSI_PASS_THRU_PROTOCOL.PassThru() for common boot scenarios.
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//
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UINT8 Data[0x2000];
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} PVSCSI_DMA_BUFFER;
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#define PVSCSI_SIG SIGNATURE_32 ('P', 'S', 'C', 'S')
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typedef struct {
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UINT32 Signature;
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EFI_PCI_IO_PROTOCOL *PciIo;
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EFI_EVENT ExitBoot;
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UINT64 OriginalPciAttributes;
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PVSCSI_RING_DESC RingDesc;
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PVSCSI_DMA_BUFFER *DmaBuf;
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PVSCSI_DMA_DESC DmaBufDmaDesc;
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UINT8 MaxTarget;
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UINT8 MaxLun;
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UINTN WaitForCmpStallInUsecs;
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EFI_EXT_SCSI_PASS_THRU_PROTOCOL PassThru;
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EFI_EXT_SCSI_PASS_THRU_MODE PassThruMode;
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} PVSCSI_DEV;
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#define PVSCSI_FROM_PASS_THRU(PassThruPointer) \
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CR (PassThruPointer, PVSCSI_DEV, PassThru, PVSCSI_SIG)
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#define PVSCSI_DMA_BUF_DEV_ADDR(Dev, MemberName) \
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(Dev->DmaBufDmaDesc.DeviceAddress + OFFSET_OF(PVSCSI_DMA_BUFFER, MemberName))
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#endif // __PVSCSI_DXE_H_
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