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MdeModulePkg NvmExpressDxe: Add buffer alignment check in PassThru API 

According to the UEFI spec, the 'TransferBuffer' and 'MetadataBuffer' used
in a data transfer should be aligned on the boundary specified by the
IoAlign field in the EFI_NVM_EXPRESS_PASS_THRU_MODE structure.

This commit adds this check to follow the spec.

Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Hao Wu 2016-08-22 13:55:52 +08:00
parent 114358eaa8
commit 3c52deafda
1 changed files with 34 additions and 21 deletions
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13
MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c
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@ -375,6 +375,7 @@ NvmExpressPassThru (
UINT64 *Prp;
VOID *PrpListHost;
UINTN PrpListNo;
UINT32 IoAlign;
UINT32 Data;
NVME_PASS_THRU_ASYNC_REQ *AsyncRequest;
EFI_TPL OldTpl;
@ -394,6 +395,18 @@ NvmExpressPassThru (
return EFI_INVALID_PARAMETER;
}
//
// Buffer alignment check for TransferBuffer & MetadataBuffer.
//
IoAlign = This->Mode->IoAlign;
if (IoAlign > 0 && (((UINTN) Packet->TransferBuffer & (IoAlign - 1)) != 0)) {
return EFI_INVALID_PARAMETER;
}
if (IoAlign > 0 && (((UINTN) Packet->MetadataBuffer & (IoAlign - 1)) != 0)) {
return EFI_INVALID_PARAMETER;
}
Private = NVME_CONTROLLER_PRIVATE_DATA_FROM_PASS_THRU (This);
PciIo = Private->PciIo;
MapData = NULL;