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* [PATCH V1 QDMA 0/1] AMD QDMA driver
@ 2023-05-26 16:49 Lizhi Hou
  2023-05-26 16:49 ` [PATCH V1 QDMA 1/1] dmaengine: amd: qdma: Add " Lizhi Hou
  0 siblings, 1 reply; 6+ messages in thread
From: Lizhi Hou @ 2023-05-26 16:49 UTC (permalink / raw)
  To: vkoul, dmaengine, linux-kernel
  Cc: Lizhi Hou, max.zhen, sonal.santan, nishad.saraf

Hello,

The QDMA subsystem is used in conjunction with the PCI Express IP block
to provide high performance data transfer between host memory and the
card's DMA subsystem.

            +-------+       +-------+       +-----------+
   PCIe     |       |       |       |       |           |
   Tx/Rx    |       |       |       |  AXI  |           |
 <=======>  | PCIE  | <===> | QDMA  | <====>| User Logic|
            |       |       |       |       |           |
            +-------+       +-------+       +-----------+

Comparing to AMD/Xilinx XDMA subsystem,
    https://lore.kernel.org/lkml/Y+XeKt5yPr1nGGaq@matsya/
the QDMA subsystem is a queue based, configurable scatter-gather DMA
implementation which provides thousands of queues, support for multiple
physical/virtual functions with single-root I/O virtualization (SR-IOV),
and advanced interrupt support. In this mode the IP provides AXI4-MM and
AXI4-Stream user interfaces which may be configured on a per-queue basis.

The QDMA has been used for Xilinx Alveo PCIe devices.
    https://www.xilinx.com/applications/data-center/v70.html

This patch series is to provide the platform driver for AMD QDMA subsystem
to support AXI4-MM DMA transfers. More functions, such as AXI4-Stream
and SR-IOV, will be supported by future patches.

The device driver for any FPGA based PCIe device which leverages QDMA can
call the standard dmaengine APIs to discover and use the QDMA subsystem
without duplicating the QDMA driver code in its own driver.


Nishad Saraf (1):
  dmaengine: amd: qdma: Add AMD QDMA driver

 MAINTAINERS                            |    9 +
 drivers/dma/Kconfig                    |   13 +
 drivers/dma/Makefile                   |    1 +
 drivers/dma/amd/Makefile               |    8 +
 drivers/dma/amd/qdma-comm-regs.c       |   66 ++
 drivers/dma/amd/qdma.c                 | 1189 ++++++++++++++++++++++++
 drivers/dma/amd/qdma.h                 |  269 ++++++
 include/linux/platform_data/amd_qdma.h |   36 +
 8 files changed, 1591 insertions(+)
 create mode 100644 drivers/dma/amd/Makefile
 create mode 100644 drivers/dma/amd/qdma-comm-regs.c
 create mode 100644 drivers/dma/amd/qdma.c
 create mode 100644 drivers/dma/amd/qdma.h
 create mode 100644 include/linux/platform_data/amd_qdma.h

-- 
2.34.1


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2023-05-30 18:29 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-05-26 16:49 [PATCH V1 QDMA 0/1] AMD QDMA driver Lizhi Hou
2023-05-26 16:49 ` [PATCH V1 QDMA 1/1] dmaengine: amd: qdma: Add " Lizhi Hou
2023-05-27 10:43   ` kernel test robot
2023-05-27 11:47   ` kernel test robot
2023-05-27 13:33   ` Christophe JAILLET
2023-05-30 18:29     ` Lizhi Hou

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