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

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Message-ID: <20250327140845.105962-1-adrian.larumbe@collabora.com>
Date: Thu, 27 Mar 2025 14:08:33 +0000
From: Adrián Larumbe <adrian.larumbe@...labora.com>
To: ?UTF-8?q?Adri=C3=A1n=20Larumbe?= <adrian.larumbe@...labora.com>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>
Cc: kernel@...labora.com,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	linaro-mm-sig@...ts.linaro.org
Subject: [PATCH v3 0/4] Panthor BO tagging and GEMS debug display

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(+)

--
2.48.1