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

From: Adrián Larumbe
Date: Thu Mar 27 2025 - 10:11:12 EST


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