Commit fa5d823b authored by Sanjay R Mehta's avatar Sanjay R Mehta Committed by Vinod Koul
Browse files

dmaengine: ptdma: Initial driver for the AMD PTDMA 



Add support for AMD PTDMA controller. It performs high-bandwidth
memory to memory and IO copy operation. Device commands are managed
via a circular queue of 'descriptors', each of which specifies source
and destination addresses for copying a single buffer of data.

Signed-off-by: default avatarSanjay R Mehta <sanju.mehta@amd.com>
Link: https://lore.kernel.org/r/1629208559-51964-2-git-send-email-Sanju.Mehta@amd.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 64d57d2c

MAINTAINERS

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@@ -979,6 +979,12 @@ S: Supported 
T:	git https://gitlab.freedesktop.org/agd5f/linux.git

F:	drivers/gpu/drm/amd/pm/powerplay/









+AMD PTDMA DRIVER









+M:	Sanjay R Mehta <sanju.mehta@amd.com>









+L:	dmaengine@vger.kernel.org









+S:	Maintained









+F:	drivers/dma/ptdma/

















AMD SEATTLE DEVICE TREE SUPPORT









M:	Brijesh Singh <brijeshkumar.singh@amd.com>









M:	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
































drivers/dma/Kconfig



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@@ -738,6 +738,8 @@ source "drivers/dma/bestcomm/Kconfig"

















source "drivers/dma/mediatek/Kconfig"



















source "drivers/dma/ptdma/Kconfig"



















source "drivers/dma/qcom/Kconfig"



















source "drivers/dma/dw/Kconfig"
































drivers/dma/Makefile



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@@ -16,6 +16,7 @@ obj-$(CONFIG_DMATEST) += dmatest.o







obj-$(CONFIG_ALTERA_MSGDMA) += altera-msgdma.o









obj-$(CONFIG_AMBA_PL08X) += amba-pl08x.o









obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/









obj-$(CONFIG_AMD_PTDMA) += ptdma/









obj-$(CONFIG_AT_HDMAC) += at_hdmac.o









obj-$(CONFIG_AT_XDMAC) += at_xdmac.o









obj-$(CONFIG_AXI_DMAC) += dma-axi-dmac.o
































drivers/dma/ptdma/Kconfig
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# SPDX-License-Identifier: GPL-2.0-only









config AMD_PTDMA









	tristate  "AMD PassThru DMA Engine"









	depends on X86_64 && PCI









	help









	  Enable support for the AMD PTDMA controller. This controller









	  provides DMA capabilities to perform high bandwidth memory to









	  memory and IO copy operations. It performs DMA transfer through









	  queue-based descriptor management. This DMA controller is intended









	  to be used with AMD Non-Transparent Bridge devices and not for









	  general purpose peripheral DMA.
























drivers/dma/ptdma/Makefile
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# SPDX-License-Identifier: GPL-2.0-only









#









# AMD Passthru DMA driver









#



















obj-$(CONFIG_AMD_PTDMA) += ptdma.o



















ptdma-objs := ptdma-dev.o



















ptdma-$(CONFIG_PCI) += ptdma-pci.o