diff options
| author | Amey Narkhede <ameynarkhede03@gmail.com> | 2021-08-17 21:04:56 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-08-19 01:03:44 +0300 |
| commit | d88f521da3efd698e36d0d504a2abba6ac4f5ef8 (patch) | |
| tree | 1f8a35513e2833ece8d61ff952c143d0d3c1b531 /Documentation/ABI/testing/sysfs-bus-pci | |
| parent | 4ec36dfeb155b72da8d28ab006a46f2f8b981eac (diff) | |
| download | linux-d88f521da3efd698e36d0d504a2abba6ac4f5ef8.tar.xz | |
PCI: Allow userspace to query and set device reset mechanism
Add "reset_method" sysfs attribute to enable user to query and set
preferred device reset methods and their ordering.
[bhelgaas: on invalid sysfs input, return error and preserve previous
config, as in earlier patch versions]
Co-developed-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20210817180500.1253-6-ameynarkhede03@gmail.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-pci')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci index 793cbb76cd25..d4ae03296861 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -121,6 +121,23 @@ Description: child buses, and re-discover devices removed earlier from this part of the device tree. +What: /sys/bus/pci/devices/.../reset_method +Date: August 2021 +Contact: Amey Narkhede <ameynarkhede03@gmail.com> +Description: + Some devices allow an individual function to be reset + without affecting other functions in the same slot. + + For devices that have this support, a file named + reset_method is present in sysfs. Reading this file + gives names of the supported and enabled reset methods and + their ordering. Writing a space-separated list of names of + reset methods sets the reset methods and ordering to be + used when resetting the device. Writing an empty string + disables the ability to reset the device. Writing + "default" enables all supported reset methods in the + default ordering. + What: /sys/bus/pci/devices/.../reset Date: July 2009 Contact: Michael S. Tsirkin <mst@redhat.com> |