[v3,0/4] Panthor BO tagging and GEMS debug display

Message

Adrián Larumbe March 27, 2025, 2:08 p.m. UTC

This patch series is aimed at providing UM with detailed memory profiling
information in debug builds. It is achieved through a device-wide list of
DRM GEM objects, and also implementing the ability to label BO's from UM
through a new IOCTL.

The new debugfs file shows a list of driver DRM GEM objects in tabular mode.
To visualise it, cat sudo cat /sys/kernel/debug/dri/*.gpu/gems.
To test this functionality from UM, please refer to this Mesa patch series:

https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34224

Changelog:
 v3:
  - Replaced kfree() with kfree_const() when freeing a bo label
  - Rearranged functions for delaing with GEMs list adding and deleting
  - Changed Kernel BO labelling format not to include quotes
  - Return error in labelling ioctl when string length is too long


Adrián Larumbe (4):
  drm/panthor: Introduce BO labeling
  drm/panthor: Add driver IOCTL for setting BO labels
  drm/panthor: show device-wide list of DRM GEM objects over DebugFS
  drm/panthor: Display heap chunk entries in DebugFS GEMS file

 drivers/gpu/drm/panthor/panthor_device.c |   5 +
 drivers/gpu/drm/panthor/panthor_device.h |  11 ++
 drivers/gpu/drm/panthor/panthor_drv.c    |  66 ++++++++++
 drivers/gpu/drm/panthor/panthor_gem.c    | 158 +++++++++++++++++++++++
 drivers/gpu/drm/panthor/panthor_gem.h    |  60 +++++++++
 drivers/gpu/drm/panthor/panthor_heap.c   |   3 +
 include/uapi/drm/panthor_drm.h           |  19 +++
 7 files changed, 322 insertions(+)

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2.48.1