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| author | Gary Lin <glin@suse.com> | 2020-07-17 14:11:27 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-07-17 20:51:55 +0000 |
| commit | f1d6c1eba1b76e57568c8d7c947f60041939f1f9 (patch) | |
| tree | dfe8f768c77a50032d39cec510c58ec4d4a4ab1e /OvmfPkg/LsiScsiDxe | |
| parent | 8d6193902f2da15c8bad9941bfe493cca903a3ca (diff) | |
| download | edk2-f1d6c1eba1b76e57568c8d7c947f60041939f1f9.tar.gz edk2-f1d6c1eba1b76e57568c8d7c947f60041939f1f9.tar.bz2 edk2-f1d6c1eba1b76e57568c8d7c947f60041939f1f9.zip | |
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>
Diffstat (limited to 'OvmfPkg/LsiScsiDxe')
| -rw-r--r-- | OvmfPkg/LsiScsiDxe/LsiScsi.c | 62 | ||||
| -rw-r--r-- | OvmfPkg/LsiScsiDxe/LsiScsi.h | 14 |
2 files changed, 75 insertions, 1 deletions
diff --git a/OvmfPkg/LsiScsiDxe/LsiScsi.c b/OvmfPkg/LsiScsiDxe/LsiScsi.c index a9c107c04e..52c224aad9 100644 --- a/OvmfPkg/LsiScsiDxe/LsiScsi.c +++ b/OvmfPkg/LsiScsiDxe/LsiScsi.c @@ -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,
diff --git a/OvmfPkg/LsiScsiDxe/LsiScsi.h b/OvmfPkg/LsiScsiDxe/LsiScsi.h index 8c2acff6e8..9f9e5c7fed 100644 --- a/OvmfPkg/LsiScsiDxe/LsiScsi.h +++ b/OvmfPkg/LsiScsiDxe/LsiScsi.h @@ -13,12 +13,26 @@ #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;
EFI_EVENT ExitBoot;
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;
|