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MdeModulePkg/AtaAtapiPassThru: enable 64-bit PCI DMA 

PCI controller drivers must set the EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE
attribute if the controller supports 64-bit DMA addressing.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Feng Tian <feng.tian@Intel.com>
This commit is contained in:
Ard Biesheuvel 2016-09-05 09:49:44 +01:00
parent 96c13c0117
commit a2c9b0873a
1 changed files with 19 additions and 1 deletions
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20
MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
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@ -2258,7 +2258,25 @@ AhciModeInitialization (
if ((Capability & EFI_AHCI_CAP_SAM) == 0) {
AhciOrReg (PciIo, EFI_AHCI_GHC_OFFSET, EFI_AHCI_GHC_ENABLE);
}
//
// Enable 64-bit DMA support in the PCI layer if this controller
// supports it.
//
if ((Capability & EFI_AHCI_CAP_S64A) != 0) {
Status = PciIo->Attributes (
PciIo,
EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE,
NULL
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_WARN,
"AhciModeInitialization: failed to enable 64-bit DMA on 64-bit capable controller (%r)\n",
Status));
}
}
//
// Get the number of command slots per port supported by this HBA.
//