lkml.org 
[lkml]   [2021]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH RESEND v2 0/7] Expose and manage PCI device reset
    Date
    [RESEND with Shanker's patches as those depend on this series]

    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 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

    Sending Raphael's patch again as this series depends on it.


    Amey Narkhede (4):
    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

    Raphael Norwitz (1):
    PCI: merge slot and bus reset implementations

    Shanker Donthineni (2):
    PCI: Add support for a function level reset based on _RST method
    PCI: Enable NO_BUS_RESET quirk for Nvidia GPUs

    Documentation/ABI/testing/sysfs-bus-pci | 16 ++
    drivers/crypto/cavium/nitrox/nitrox_main.c | 4 +-
    .../ethernet/cavium/liquidio/lio_vf_main.c | 2 +-
    drivers/pci/pci-sysfs.c | 93 +++++++-
    drivers/pci/pci.c | 206 +++++++++++-------
    drivers/pci/pci.h | 10 +-
    drivers/pci/pcie/aer.c | 12 +-
    drivers/pci/probe.c | 4 +-
    drivers/pci/quirks.c | 23 +-
    include/linux/pci.h | 11 +-
    10 files changed, 278 insertions(+), 103 deletions(-)

    --
    2.31.1

    \
     
     \ /
      Last update: 2021-05-20 01:55    [W:8.598 / U:0.044 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site