From: Jan Dąbroś <[email protected]> This patch adds IsDmaEnabled function to EFI_SD_MMC_PASS_THRU_PROTOCOL. It returns information, if controller supports DMA transfer modes. New interface is necessary in order to allow BlockIo layer to perform transfers in PIO mode.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jan Dabros <[email protected]> Signed-off-by: Marcin Wojtas <[email protected]> --- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c | 39 +++++++++++++++++++++- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h | 21 ++++++++++++ MdePkg/Include/Protocol/SdMmcPassThru.h | 22 ++++++++++++ 3 files changed, 81 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c index ed6b557..ba6e69a 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c @@ -42,7 +42,8 @@ SD_MMC_HC_PRIVATE_DATA gSdMmcPciHcTemplate = { SdMmcPassThruGetNextSlot, SdMmcPassThruBuildDevicePath, SdMmcPassThruGetSlotNumber, - SdMmcPassThruResetDevice + SdMmcPassThruResetDevice, + SdMmcPassThruIsDmaEnabled }, 0, // PciAttributes 0, // PreviousSlot @@ -1291,3 +1292,39 @@ SdMmcPassThruResetDevice ( return EFI_SUCCESS; } +/** + Checks if this SD controller supports DMA transfer according to capabilities register. + + If controller supports ADMA or SDMA, EFI_SUCCESS is returned. + + If controller does not support ADMA nor SDMA, EFI_UNSUPPORTED is returned. + + @param[in] This A pointer to the EFI_SD_MMC_PASS_THRU_PROTOCOL instance. + @param[in] Slot Specifies the slot, whose DMA-support will be checked. + + @retval EFI_SUCCESS SD controller supports DMA operations. + @retval EFI_UNSUPPORTED SD controller does not support DMA operations. + +**/ +EFI_STATUS +EFIAPI +SdMmcPassThruIsDmaEnabled ( + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *This, + IN UINT8 Slot + ) +{ + SD_MMC_HC_PRIVATE_DATA *Private; + + if (This == NULL) { + return EFI_INVALID_PARAMETER; + } + + Private = SD_MMC_HC_PRIVATE_FROM_THIS (This); + + if (Private->Capability[Slot].Adma2 == 0 && + Private->Capability[Slot].Sdma == 0) { + return EFI_UNSUPPORTED; + } + + return EFI_SUCCESS; +} diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h index 6a2a279..7856b4e 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h @@ -372,6 +372,27 @@ SdMmcPassThruResetDevice ( IN UINT8 Slot ); +/** + Checks if this SD controller supports DMA transfer according to capabilities register. + + If controller supports ADMA or SDMA, EFI_SUCCESS is returned. + + If controller does not support ADMA nor SDMA, EFI_UNSUPPORTED is returned. + + @param[in] This A pointer to the EFI_SD_MMC_PASS_THRU_PROTOCOL instance. + @param[in] Slot Specifies the slot, whose DMA-support will be checked. + + @retval EFI_SUCCESS SD controller supports DMA operations. + @retval EFI_UNSUPPORTED SD controller does not support DMA operations. + +**/ +EFI_STATUS +EFIAPI +SdMmcPassThruIsDmaEnabled ( + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *This, + IN UINT8 Slot + ); + // // Driver model protocol interfaces // diff --git a/MdePkg/Include/Protocol/SdMmcPassThru.h b/MdePkg/Include/Protocol/SdMmcPassThru.h index e22456c..7abe40a 100644 --- a/MdePkg/Include/Protocol/SdMmcPassThru.h +++ b/MdePkg/Include/Protocol/SdMmcPassThru.h @@ -250,6 +250,27 @@ EFI_STATUS IN UINT8 Slot ); +/** + Checks if this SD controller supports DMA transfer according to capabilities register. + + If controller supports ADMA or SDMA, EFI_SUCCESS is returned. + + If controller does not support ADMA nor SDMA, EFI_UNSUPPORTED is returned. + + @param[in] This A pointer to the EFI_SD_MMC_PASS_THRU_PROTOCOL instance. + @param[in] Slot Specifies the slot, whose DMA-support will be checked. + + @retval EFI_SUCCESS SD controller supports DMA operations. + @retval EFI_UNSUPPORTED SD controller does not support DMA operations. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_SD_MMC_PASS_THRU_IS_DMA_ENABLED) ( + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *This, + IN UINT8 Slot +); + struct _EFI_SD_MMC_PASS_THRU_PROTOCOL { UINT32 IoAlign; EFI_SD_MMC_PASS_THRU_PASSTHRU PassThru; @@ -257,6 +278,7 @@ struct _EFI_SD_MMC_PASS_THRU_PROTOCOL { EFI_SD_MMC_PASS_THRU_BUILD_DEVICE_PATH BuildDevicePath; EFI_SD_MMC_PASS_THRU_GET_SLOT_NUMBER GetSlotNumber; EFI_SD_MMC_PASS_THRU_RESET_DEVICE ResetDevice; + EFI_SD_MMC_PASS_THRU_IS_DMA_ENABLED IsDmaEnabled; }; extern EFI_GUID gEfiSdMmcPassThruProtocolGuid; -- 1.8.3.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
