linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Amey Narkhede <ameynarkhede03@gmail.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: alex.williamson@redhat.com,
	Raphael Norwitz <raphael.norwitz@nutanix.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	kw@linux.com, Shanker Donthineni <sdonthineni@nvidia.com>,
	Sinan Kaya <okaya@kernel.org>, Len Brown <lenb@kernel.org>,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Amey Narkhede <ameynarkhede03@gmail.com>
Subject: [PATCH v9 0/8] Expose and manage PCI device reset
Date: Mon,  5 Jul 2021 19:51:30 +0530	[thread overview]
Message-ID: <20210705142138.2651-1-ameynarkhede03@gmail.com> (raw)

PCI and PCIe devices may support a number of possible reset mechanisms
for example Function Level Reset (FLR) provided via Advanced Feature or
PCIe capabilities, Power Management reset, bus reset, or device specific reset.
Currently the PCI subsystem creates a policy prioritizing these reset methods
which provides neither visibility nor control to userspace.

Expose the reset methods available per device to userspace, via sysfs
and allow an administrative user or device owner to have ability to
manage per device reset method priorities or exclusions.
This feature aims to allow greater control of a device for use cases
as device assignment, where specific device or platform issues may
interact poorly with a given reset method, and for which device specific
quirks have not been developed.

Changes in v9:
	- Renamed has_flr bitfield to has_pcie_flr and restored
	  use of PCI_DEV_FLAGS_NO_FLR_RESET in quirk_no_flr()
	- Cleaned up sysfs code

Changes in v8:
	- Added has_flr bitfield to struct pci_dev to cache flr
	  capability
	- Updated encoding scheme used in reset_methods array as per
	  Bjorn's suggestion
	- Updated Shanker's ACPI patches

Changes in v7:
	- Fix the pci_dev_acpi_reset() prototype mismatch
	  in case of CONFIG_ACPI=n

Changes in v6:
	- Address Bjorn's and Krzysztof's review comments
	- Add Shanker's updated patches along with new
	  "PCI: Setup ACPI_COMPANION early" patch

Changes in v5:
	- Rebase the series over pci/reset branch of
	  Bjorn's pci tree to avoid merge conflicts
	  caused by recent changes in existing reset
	  sysfs attribute

Changes in v4:
	- Change the order or strlen and strim in reset_method_store
	  function to avoid extra strlen call.
	- Use consistent terminology in new
	  pci_reset_mode enum and rename the probe argument
	  of reset functions.

Changes in v3:
	- Dropped "PCI: merge slot and bus reset implementations" which was
	  already accepted separately
	- Grammar fixes
	- Added Shanker's patches which were rebased on v2 of this series
	- Added "PCI: Change the type of probe argument in reset functions"
	  and additional user input sanitization code in reset_method_store
	  function per review feedback from Krzysztof

Changes in v2:
	- Use byte array instead of bitmap to keep track of
	  ordering of reset methods
	- Fix incorrect use of reset_fn field in octeon driver
	- Allow writing comma separated list of names of supported reset
	  methods to reset_method sysfs attribute
	- Writing empty string instead of "none" to reset_method attribute
	  disables ability of reset the device

Amey Narkhede (5):
  PCI: Add pcie_reset_flr to follow calling convention of other reset
    methods
  PCI: Add new array for keeping track of ordering of reset methods
  PCI: Remove reset_fn field from pci_dev
  PCI/sysfs: Allow userspace to query and set device reset mechanism
  PCI: Change the type of probe argument in reset functions

Shanker Donthineni (3):
  PCI: Define a function to set ACPI_COMPANION in pci_dev
  PCI: Setup ACPI fwnode early and at the same time with OF
  PCI: Add support for ACPI _RST reset method

 Documentation/ABI/testing/sysfs-bus-pci       |  19 ++
 drivers/crypto/cavium/nitrox/nitrox_main.c    |   4 +-
 .../ethernet/cavium/liquidio/lio_vf_main.c    |   2 +-
 drivers/pci/hotplug/pciehp.h                  |   2 +-
 drivers/pci/hotplug/pciehp_hpc.c              |   4 +-
 drivers/pci/pci-acpi.c                        |  38 +++-
 drivers/pci/pci-sysfs.c                       | 107 ++++++++-
 drivers/pci/pci.c                             | 215 ++++++++++--------
 drivers/pci/pci.h                             |  23 +-
 drivers/pci/pcie/aer.c                        |  12 +-
 drivers/pci/probe.c                           |  17 +-
 drivers/pci/quirks.c                          |  42 ++--
 drivers/pci/remove.c                          |   1 -
 include/linux/pci.h                           |  17 +-
 include/linux/pci_hotplug.h                   |   2 +-
 15 files changed, 361 insertions(+), 144 deletions(-)

--
2.32.0

             reply	other threads:[~2021-07-05 14:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-05 14:21 Amey Narkhede [this message]
2021-07-05 14:21 ` [PATCH v9 1/8] PCI: Add pcie_reset_flr to follow calling convention of other reset methods Amey Narkhede
2021-07-05 14:37   ` Amey Narkhede
2021-07-08 20:24     ` Alex Williamson
2021-07-11 16:40   ` Raphael Norwitz
2021-07-05 14:21 ` [PATCH v9 2/8] PCI: Add new array for keeping track of ordering of " Amey Narkhede
2021-07-11 16:42   ` Raphael Norwitz
2021-07-14 13:13     ` Shanker R Donthineni
2021-07-05 14:21 ` [PATCH v9 3/8] PCI: Remove reset_fn field from pci_dev Amey Narkhede
2021-07-05 14:21 ` [PATCH v9 4/8] PCI/sysfs: Allow userspace to query and set device reset mechanism Amey Narkhede
2021-07-06  5:16   ` Leon Romanovsky
2021-07-11 16:51   ` Raphael Norwitz
2021-07-14 11:59     ` Amey Narkhede
2021-07-05 14:21 ` [PATCH v9 5/8] PCI: Define a function to set ACPI_COMPANION in pci_dev Amey Narkhede
2021-07-05 14:21 ` [PATCH v9 6/8] PCI: Setup ACPI fwnode early and at the same time with OF Amey Narkhede
2021-07-05 14:21 ` [PATCH v9 7/8] PCI: Add support for ACPI _RST reset method Amey Narkhede
2021-07-05 14:21 ` [PATCH v9 8/8] PCI: Change the type of probe argument in reset functions Amey Narkhede
2021-07-05 23:39   ` kernel test robot

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210705142138.2651-1-ameynarkhede03@gmail.com \
    --to=ameynarkhede03@gmail.com \
    --cc=alex.williamson@redhat.com \
    --cc=bhelgaas@google.com \
    --cc=kw@linux.com \
    --cc=lenb@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=okaya@kernel.org \
    --cc=raphael.norwitz@nutanix.com \
    --cc=rjw@rjwysocki.net \
    --cc=sdonthineni@nvidia.com \
    --subject='Re: [PATCH v9 0/8] Expose and manage PCI device reset' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).