diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c | 22 | ||||
| -rw-r--r-- | MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h | 2 |
2 files changed, 23 insertions, 1 deletions
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c index 4798bea860..1058f03030 100644 --- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c +++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c @@ -125,7 +125,7 @@ XhcGetCapability ( Xhc = XHC_FROM_THIS (This);
*MaxSpeed = EFI_USB_SPEED_SUPER;
*PortNumber = (UINT8) (Xhc->HcSParams1.Data.MaxPorts);
- *Is64BitCapable = (UINT8) (Xhc->HcCParams.Data.Ac64);
+ *Is64BitCapable = (UINT8) Xhc->Support64BitDma;
DEBUG ((EFI_D_INFO, "XhcGetCapability: %d ports, 64 bit %d\n", *PortNumber, *Is64BitCapable));
gBS->RestoreTPL (OldTpl);
@@ -2020,6 +2020,26 @@ XhcDriverBindingStart ( return EFI_OUT_OF_RESOURCES;
}
+ //
+ // Enable 64-bit DMA support in the PCI layer if this controller
+ // supports it.
+ //
+ if (Xhc->HcCParams.Data.Ac64 != 0) {
+ Status = PciIo->Attributes (
+ PciIo,
+ EfiPciIoAttributeOperationEnable,
+ EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE,
+ NULL
+ );
+ if (!EFI_ERROR (Status)) {
+ Xhc->Support64BitDma = TRUE;
+ } else {
+ DEBUG ((EFI_D_WARN,
+ "%a: failed to enable 64-bit DMA on 64-bit capable controller @ %p (%r)\n",
+ __FUNCTION__, Controller, Status));
+ }
+ }
+
XhcSetBiosOwnership (Xhc);
XhcResetHC (Xhc, XHC_RESET_TIMEOUT);
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h index 7999151b3f..0f53bb0eff 100644 --- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h +++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h @@ -256,6 +256,8 @@ struct _USB_XHCI_INSTANCE { // The array supports up to 255 devices, entry 0 is reserved and should not be used.
//
USB_DEV_CONTEXT UsbDevContext[256];
+
+ BOOLEAN Support64BitDma; // Whether 64 bit DMA may be used with this device
};
|