diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-09-05 09:49:44 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-09-06 15:40:49 +0100 |
| commit | a2c9b0873a7713df3d491307009b63ad0acd52f0 (patch) | |
| tree | 8e813b7c7c2000fc77e57b065d3407b08bcb3ccb /MdeModulePkg | |
| parent | 96c13c011766a950247c743887705cc035a15497 (diff) | |
| download | edk2-platforms-a2c9b0873a7713df3d491307009b63ad0acd52f0.tar.xz | |
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>
Diffstat (limited to 'MdeModulePkg')
| -rw-r--r-- | MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c index 469a40ac39..68bce94810 100644 --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c @@ -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.
//
|