Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Documentation/gpu: Add fdinfo meanings of panthor-*-memory tags 

A previous commit enabled display of driver-internal kernel BO sizes
through the device file's fdinfo interface.

Expand the description of the relevant driver-specific key:value pairs
with the definitions of the new panthor-*-memory ones.

Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250130172851.941597-5-adrian.larumbe@collabora.com
This commit is contained in:
Adrián Larumbe 2025-01-30 17:28:12 +00:00 committed by Boris Brezillon
parent 434e5ca5b5
commit f780ef56f7
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/gpu/panthor.rst
View File

@ -26,6 +26,8 @@ the currently possible format options:
drm-cycles-panthor: 94439687187 drm-cycles-panthor: 94439687187
drm-maxfreq-panthor: 1000000000 Hz drm-maxfreq-panthor: 1000000000 Hz
drm-curfreq-panthor: 1000000000 Hz drm-curfreq-panthor: 1000000000 Hz
panthor-resident-memory: 10396 KiB
panthor-active-memory: 10396 KiB
drm-total-memory: 16480 KiB drm-total-memory: 16480 KiB
drm-shared-memory: 0 drm-shared-memory: 0
drm-active-memory: 16200 KiB drm-active-memory: 16200 KiB
@ -44,3 +46,11 @@ driver by writing into the appropriate sysfs node::
Where `N` is a bit mask where cycle and timestamp sampling are respectively Where `N` is a bit mask where cycle and timestamp sampling are respectively
enabled by the first and second bits. enabled by the first and second bits.
Possible `panthor-*-memory` keys are: `active` and `resident`.
These values convey the sizes of the internal driver-owned shmem BO's that
aren't exposed to user-space through a DRM handle, like queue ring buffers,
sync object arrays and heap chunks. Because they are all allocated and pinned
at creation time, only `panthor-resident-memory` is necessary to tell us their
size. `panthor-active-memory` shows the size of kernel BO's associated with
VM's and groups currently being scheduled for execution by the GPU.