[PATCH 0/2] Add configfs support for survivability mode

[Riana Tauro]

This series proposes to expose attributes via xe configfs
subsystem. Xe registers a configfs subsystem named 'xe'.
Userspace can then create directories for the devices they
want to configure and set appropriate attributes

This is done by

mount -t configfs none /config
mkdir /config/xe/0000:03:00.0 

echo 0000:03:00.0 > /sys/bus/pci/drivers/xe/unbind
echo 1 > sys/kernel/config/xe/0000:03:00.0/survivability_mode
echo 0000:03:00.0 > /sys/bus/pci/drivers/xe/bind

This is an alternative to introducing module param that causes
all the connected and supported GPU cards to enter survivability mode.
Manually entering survivability mode is useful when pcode does not
report failure, in field repairs and validation

Rev2: use config_groups (Lucas)

Riana Tauro (2):
  drm/xe: Add configfs to enable survivability mode
  drm/xe: Enable configfs support for survivability mode

 drivers/gpu/drm/xe/Makefile                |   1 +
 drivers/gpu/drm/xe/xe_configfs.c           | 236 +++++++++++++++++++++
 drivers/gpu/drm/xe/xe_configfs.h           |  16 ++
 drivers/gpu/drm/xe/xe_device.c             |   2 +-
 drivers/gpu/drm/xe/xe_module.c             |   5 +
 drivers/gpu/drm/xe/xe_pci.c                |  19 +-
 drivers/gpu/drm/xe/xe_survivability_mode.c |  39 +++-
 drivers/gpu/drm/xe/xe_survivability_mode.h |   2 +-
 8 files changed, 299 insertions(+), 21 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_configfs.c
 create mode 100644 drivers/gpu/drm/xe/xe_configfs.h

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2.47.1