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 <[email protected]> --- MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressHci.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressHci.c b/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressHci.c index a173504cdf4d..51cff3c96c29 100644 --- a/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressHci.c +++ b/MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressHci.c @@ -863,6 +863,19 @@ NvmeControllerInit ( } // + // Enable 64-bit DMA support in the PCI layer. + // + Status = PciIo->Attributes ( + PciIo, + EfiPciIoAttributeOperationEnable, + EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE, + NULL + ); + if (EFI_ERROR (Status)) { + DEBUG ((EFI_D_WARN, "NvmeControllerInit: failed to enable 64-bit DMA (%r)\n", Status)); + } + + // // Read the Controller Capabilities register and verify that the NVM command set is supported // Status = ReadNvmeControllerCapabilities (Private, &Private->Cap); -- 2.7.4 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
