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OvmfPkg/LsiScsiDxe: Map DMA buffer

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Map DMA buffer and perpare for the implementation of LsiScsiPassThru().

v2:
  - Replace 0x10000 with SIZE_64KB macro for the DMA buffer data array
  - Remove DUAL_ADDRESS_CYCLE from PciIo since we don't really need
    64-bit DMA address

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200717061130.8881-9-glin@suse.com>
This commit is contained in:
Gary Lin
2020-07-17 14:11:27 +08:00
committed by mergify[bot]
parent 8d6193902f
commit f1d6c1eba1
2 changed files with 75 additions and 1 deletions
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14
OvmfPkg/LsiScsiDxe/LsiScsi.h
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@@ -12,6 +12,17 @@
#ifndef _LSI_SCSI_DXE_H_
#define _LSI_SCSI_DXE_H_
typedef struct {
//
// Allocate 64KB for read/write buffer. It seems sufficient for the common
// boot scenarios.
//
// NOTE: The number of bytes for data transmission is bounded by DMA Byte
// Count (DBC), a 24-bit register, so the maximum is 0xFFFFFF (16MB-1).
//
UINT8 Data[SIZE_64KB];
} LSI_SCSI_DMA_BUFFER;
typedef struct {
UINT32 Signature;
UINT64 OrigPciAttrs;
@@ -19,6 +30,9 @@ typedef struct {
EFI_PCI_IO_PROTOCOL *PciIo;
UINT8 MaxTarget;
UINT8 MaxLun;
LSI_SCSI_DMA_BUFFER *Dma;
EFI_PHYSICAL_ADDRESS DmaPhysical;
VOID *DmaMapping;
EFI_EXT_SCSI_PASS_THRU_MODE PassThruMode;
EFI_EXT_SCSI_PASS_THRU_PROTOCOL PassThru;
} LSI_SCSI_DEV;