Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Mike Maslenkin <miha...@parallels.com>
---
MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c | 6 +++---
MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h | 1 +
MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf | 6 +++++-
MdeModulePkg/MdeModulePkg.dec | 2 ++
4 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
index 223dd4c47586..14600d65bde8 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
@@ -1795,7 +1795,7 @@ ScsiDiskReadSectors (
// limit the data bytes that can be transferred by one Read(10) or Read(16)
Command
//
if (!ScsiDiskDevice->Cdb16Byte) {
- MaxBlock = 0xFFFF;
+ MaxBlock = PcdGet16 (PcdScsiMaximumTransferredBlocks);
} else {
MaxBlock = 0xFFFFFFFF;
}
@@ -1946,10 +1946,10 @@ ScsiDiskWriteSectors (
BlockSize = ScsiDiskDevice->BlkIo.Media->BlockSize;
//
- // limit the data bytes that can be transferred by one Read(10) or Read(16)
Command
+ // limit the data bytes that can be transferred by one Write(10) or
Write(16) Command
//
if (!ScsiDiskDevice->Cdb16Byte) {
- MaxBlock = 0xFFFF;
+ MaxBlock = PcdGet16 (PcdScsiMaximumTransferredBlocks);
} else {
MaxBlock = 0xFFFFFFFF;
}
diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
index 21dcbd32d4af..4836d3f8c146 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.h
@@ -31,6 +31,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
EXPRESS OR IMPLIED.
#include <Library/DebugLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiLib.h>
+#include <Library/PcdLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiScsiLib.h>
diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
index dd94eac5401a..724aaa971f93 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
@@ -40,7 +40,7 @@
[Packages]
MdePkg/MdePkg.dec
-
+ MdeModulePkg/MdeModulePkg.dec
[LibraryClasses]
UefiBootServicesTableLib
@@ -51,6 +51,7 @@
UefiDriverEntryPoint
DebugLib
DevicePathLib
+ PcdLib
[Protocols]
gEfiDiskInfoProtocolGuid ## BY_START
@@ -63,3 +64,6 @@
gEfiDiskInfoScsiInterfaceGuid ## SOMETIME_PRODUCES (The
device is physical SCSI disk)
gEfiDiskInfoIdeInterfaceGuid ## SOMETIME_PRODUCES (The
device is ATAPI device in IDE mode)
gEfiDiskInfoAhciInterfaceGuid ## SOMETIME_PRODUCES (The
device is ATAPI device in AHCI mode)
+
+[Pcd]
+ gEfiMdeModulePkgTokenSpaceGuid.PcdScsiMaximumTransferredBlocks
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index c2a6decbd46b..04db5973991b 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -881,6 +881,8 @@
## This PCD specifies whether full PCI enumeration is disabled.
gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE|BOOLEAN|0x10000048
+ ## This PCD specifies a maximum blocks number transferred during
Read10/Write10 command
+
gEfiMdeModulePkgTokenSpaceGuid.PcdScsiMaximumTransferredBlocks|0xFFFF|UINT16|0x10000049
[PcdsPatchableInModule]
## Specify memory size with page number for PEI code when
# the feature of Loading Module at Fixed Address is enabled
--
1.7.10.4
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