diff options
| author | Lizhi Hou <lizhi.hou@amd.com> | 2023-01-19 08:32:05 -0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-02-10 11:32:26 +0530 |
| commit | 17ce252266c7f016ece026492c45838f852ddc79 (patch) | |
| tree | 4c45ddbf29d921d693e649c3fbfa72644c138695 /drivers/dma/Kconfig | |
| parent | 4b23603a251d24022f2fa48ee67610eb245a4115 (diff) | |
dmaengine: xilinx: xdma: Add xilinx xdma driver
Add driver to enable PCIe board which uses XDMA (the DMA/Bridge Subsystem
for PCI Express). For example, Xilinx Alveo PCIe devices.
https://www.xilinx.com/products/boards-and-kits/alveo.html
The XDMA engine support up to 4 Host to Card (H2C) and 4 Card to Host (C2H)
channels. Memory transfers are specified on a per-channel basis in
descriptor linked lists, which the DMA fetches from host memory and
processes. Events such as descriptor completion and errors are signaled
using interrupts. The hardware detail is provided by
https://docs.xilinx.com/r/en-US/pg195-pcie-dma/Introduction
This driver implements dmaengine APIs.
- probe the available DMA channels
- use dma_slave_map for channel lookup
- use virtual channel to manage dmaengine tx descriptors
- implement device_prep_slave_sg callback to handle host scatter gather
list
- implement device_config to config device address for DMA transfer
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Signed-off-by: Sonal Santan <sonal.santan@amd.com>
Signed-off-by: Max Zhen <max.zhen@amd.com>
Signed-off-by: Brian Xu <brian.xu@amd.com>
Tested-by: Martin Tuma <tumic@gpxsee.org>
Link: https://lore.kernel.org/r/1674145926-29449-2-git-send-email-lizhi.hou@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/Kconfig')
| -rw-r--r-- | drivers/dma/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 7b95f07c6f1a..472dc315b889 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -728,6 +728,20 @@ config XILINX_DMA the scatter gather interface with multiple channels independent configuration support. +config XILINX_XDMA + tristate "Xilinx DMA/Bridge Subsystem DMA Engine" + depends on HAS_IOMEM + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + select REGMAP_MMIO + help + Enable support for Xilinx DMA/Bridge Subsystem DMA engine. The DMA + provides high performance block data movement between Host memory + and the DMA subsystem. These direct memory transfers can be both in + the Host to Card (H2C) and Card to Host (C2H) transfers. + The core also provides up to 16 user interrupt wires that generate + interrupts to the host. + config XILINX_ZYNQMP_DMA tristate "Xilinx ZynqMP DMA Engine" depends on ARCH_ZYNQ || MICROBLAZE || ARM64 || COMPILE_TEST |