lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <1709675352-19564-1-git-send-email-lizhi.hou@amd.com>
Date: Tue, 5 Mar 2024 13:49:11 -0800
From: Lizhi Hou <lizhi.hou@....com>
To: <vkoul@...nel.org>, <dmaengine@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: Lizhi Hou <lizhi.hou@....com>, <nishad.saraf@....com>,
	<sonal.santan@....com>, <max.zhen@....com>
Subject: [PATCH V10 0/1] AMD QDMA driver

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.

Changes since v9:
- Merge 2 patches into 1 patch

Changes since v8:
- Replaced dma_alloc_coherent() with dmam_alloc_coherent()

Changes since v7:
- Fixed smatch warnings

Changes since v6:
- Added a patch to create amd/ and empty Kconfig/Makefile for AMD drivers
- Moved source code under amd/qdma/
- Minor changes for code review comments

Changes since v5:
- Add more in patch description.

Changes since v4:
- Convert to use platform driver callback .remove_new()

Changes since v3:
- Minor changes in Kconfig description.

Changes since v2:
- A minor change from code review comments.

Changes since v1:
- Minor changes from code review comments.
- Fixed kernel robot warning.

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

 MAINTAINERS                            |    8 +
 drivers/dma/Kconfig                    |    2 +
 drivers/dma/Makefile                   |    1 +
 drivers/dma/amd/Kconfig                |   14 +
 drivers/dma/amd/Makefile               |    6 +
 drivers/dma/amd/qdma/Makefile          |    8 +
 drivers/dma/amd/qdma/qdma-comm-regs.c  |   64 ++
 drivers/dma/amd/qdma/qdma.c            | 1162 ++++++++++++++++++++++++
 drivers/dma/amd/qdma/qdma.h            |  265 ++++++
 include/linux/platform_data/amd_qdma.h |   36 +
 10 files changed, 1566 insertions(+)
 create mode 100644 drivers/dma/amd/Kconfig
 create mode 100644 drivers/dma/amd/Makefile
 create mode 100644 drivers/dma/amd/qdma/Makefile
 create mode 100644 drivers/dma/amd/qdma/qdma-comm-regs.c
 create mode 100644 drivers/dma/amd/qdma/qdma.c
 create mode 100644 drivers/dma/amd/qdma/qdma.h
 create mode 100644 include/linux/platform_data/amd_qdma.h

-- 
2.34.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ