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OvmfPkg/LsiScsiDxe: Map DMA buffer 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
OvmfPkg/LsiScsiDxe/LsiScsi.c
View File

@ -356,6 +356,8 @@ LsiScsiControllerStart (
{
EFI_STATUS Status;
LSI_SCSI_DEV *Dev;
UINTN Pages;
UINTN BytesMapped;
Dev = AllocateZeroPool (sizeof (*Dev));
if (Dev == NULL) {
@ -411,11 +413,45 @@ LsiScsiControllerStart (
goto CloseProtocol;
}
Status = LsiScsiReset (Dev);
//
// Create buffers for data transfer
//
Pages = EFI_SIZE_TO_PAGES (sizeof (*Dev->Dma));
Status = Dev->PciIo->AllocateBuffer (
Dev->PciIo,
AllocateAnyPages,
EfiBootServicesData,
Pages,
(VOID **)&Dev->Dma,
EFI_PCI_ATTRIBUTE_MEMORY_CACHED
);
if (EFI_ERROR (Status)) {
goto RestoreAttributes;
}
BytesMapped = EFI_PAGES_TO_SIZE (Pages);
Status = Dev->PciIo->Map (
Dev->PciIo,
EfiPciIoOperationBusMasterCommonBuffer,
Dev->Dma,
&BytesMapped,
&Dev->DmaPhysical,
&Dev->DmaMapping
);
if (EFI_ERROR (Status)) {
goto FreeBuffer;
}
if (BytesMapped != EFI_PAGES_TO_SIZE (Pages)) {
Status = EFI_OUT_OF_RESOURCES;
goto Unmap;
}
Status = LsiScsiReset (Dev);
if (EFI_ERROR (Status)) {
goto Unmap;
}
Status = gBS->CreateEvent (
EVT_SIGNAL_EXIT_BOOT_SERVICES,
TPL_CALLBACK,
@ -462,6 +498,19 @@ CloseExitBoot:
UninitDev:
LsiScsiReset (Dev);
Unmap:
Dev->PciIo->Unmap (
Dev->PciIo,
Dev->DmaMapping
);
FreeBuffer:
Dev->PciIo->FreeBuffer (
Dev->PciIo,
Pages,
Dev->Dma
);
RestoreAttributes:
Dev->PciIo->Attributes (
Dev->PciIo,
@ -524,6 +573,17 @@ LsiScsiControllerStop (
LsiScsiReset (Dev);
Dev->PciIo->Unmap (
Dev->PciIo,
Dev->DmaMapping
);
Dev->PciIo->FreeBuffer (
Dev->PciIo,
EFI_SIZE_TO_PAGES (sizeof (*Dev->Dma)),
Dev->Dma
);
Dev->PciIo->Attributes (
Dev->PciIo,
EfiPciIoAttributeOperationSet,

14
OvmfPkg/LsiScsiDxe/LsiScsi.h
View File

@ -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;