linux-kernel - [PATCH v7 0/7] cdx: provide sysfs interface for cdx device resources

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Message-ID: <20231017160505.10640-1-abhijit.gangurde@amd.com>
Date:   Tue, 17 Oct 2023 21:34:58 +0530
From:   Abhijit Gangurde <abhijit.gangurde@....com>
To:     <gregkh@...uxfoundation.org>, <masahiroy@...nel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <puneet.gupta@....com>, <Nipun.Gupta@....com>,
        <nikhil.agarwal@....com>, <michal.simek@....com>, <git@....com>,
        Abhijit Gangurde <abhijit.gangurde@....com>
Subject: [PATCH v7 0/7] cdx: provide sysfs interface for cdx device resources

This patch series provides sysfs interface to
 - enable and disable of cdx bus
 - reset all the devices on cdx bus
 - subsystem, class and revision for cdx device

Changes in v7:
 - Create symbol namespaces for cdx subsystem

Changes in v6:
 - Register cdx bus on cdx subsystem
 - Remove bus attributes enable, disable and reset
 - Add new device attributes enable visible only for bus
   device.
 - Use reset attribute of cdx device for bus reset.

Changes in v5:
 - Rebased on Linux 6.6

Changes in v4:
 - Make ida as static
 - Improve commit message
 - Add sparse markings for the lock

Changes in v3:
 - Remove local cdx controller list from cdx bus system and
   instead use platform bus to locate controller
 - Use ida to allocate unique id for registered controller

Changes in v2:
 - Introduce lock to protect controller ops
 - Split sysfs entry enable to enable and disable
 - sysfs entry enable and disable take bus number as an argument
 - sysfs entry reset takes bus number as an argument

Abhijit Gangurde (7):
  cdx: Remove cdx controller list from cdx bus system
  cdx: Introduce lock to protect controller ops
  cdx: Create symbol namespaces for cdx subsystem
  cdx: Register cdx bus as a device on cdx subsystem
  cdx: add support for bus enable and disable
  cdx: add sysfs for bus reset
  cdx: add sysfs for subsystem, class and revision

 Documentation/ABI/testing/sysfs-bus-cdx |  66 +++++-
 drivers/cdx/Makefile                    |   2 +
 drivers/cdx/cdx.c                       | 264 +++++++++++++++++++++---
 drivers/cdx/cdx.h                       |  22 +-
 drivers/cdx/controller/cdx_controller.c |  20 ++
 drivers/cdx/controller/mc_cdx_pcol.h    |  54 +++++
 drivers/cdx/controller/mcdi_functions.c |  31 +++
 drivers/cdx/controller/mcdi_functions.h |  18 ++
 drivers/vfio/cdx/main.c                 |   1 +
 include/linux/cdx/cdx_bus.h             |  41 +++-
 include/linux/mod_devicetable.h         |  10 +
 scripts/mod/devicetable-offsets.c       |   4 +
 scripts/mod/file2alias.c                |   8 +
 13 files changed, 506 insertions(+), 35 deletions(-)

-- 
2.34.1