diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci/SdMmcPciHcDxe')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c index 0be081dad0..5de1dd6fd9 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c @@ -527,6 +527,7 @@ SdMmcPciHcDriverBindingStart ( CARD_TYPE_DETECT_ROUTINE *Routine;
UINT32 RoutineNum;
BOOLEAN MediaPresent;
+ BOOLEAN Support64BitDma;
DEBUG ((EFI_D_INFO, "SdMmcPciHcDriverBindingStart: Start\n"));
@@ -600,6 +601,7 @@ SdMmcPciHcDriverBindingStart ( goto Done;
}
+ Support64BitDma = TRUE;
for (Slot = FirstBar; Slot < (FirstBar + SlotNum); Slot++) {
Private->Slot[Slot].Enable = TRUE;
@@ -609,6 +611,8 @@ SdMmcPciHcDriverBindingStart ( }
DumpCapabilityReg (Slot, &Private->Capability[Slot]);
+ Support64BitDma &= Private->Capability[Slot].SysBus64;
+
Status = SdMmcHcGetMaxCurrent (PciIo, Slot, &Private->MaxCurrent[Slot]);
if (EFI_ERROR (Status)) {
continue;
@@ -664,6 +668,22 @@ SdMmcPciHcDriverBindingStart ( }
//
+ // Enable 64-bit DMA support in the PCI layer if this controller
+ // supports it.
+ //
+ if (Support64BitDma) {
+ Status = PciIo->Attributes (
+ PciIo,
+ EfiPciIoAttributeOperationEnable,
+ EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_WARN, "SdMmcPciHcDriverBindingStart: failed to enable 64-bit DMA (%r)\n", Status));
+ }
+ }
+
+ //
// Start the asynchronous I/O monitor
//
Status = gBS->CreateEvent (
|