drm/xe: Expose bad VRAM pages via debugfs

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Add a debugfs file "vram_bad_pages" that shows offlined and queued
VRAM pages across all tiles. Each entry displays the page frame number,
GPU page size, and status flag (R=reserved, P=pending, F=failed).

example,
cat /sys/kernel/debug/dri/0/vram_bad_pages

max_pages: 10000
0x0000000000000000 : 0x0000000000001000 : R
0x0000000000001234 : 0x0000000000001000 : P
0x0000000000080000 : 0x0000000000001000 : R   ← tile 1 addr

v3(Michal):
-add kernel doc
v2(Sashikoi/Michal/Himal):
-Remove block iteration, use offline and queue list only
-Move platform check inside api

Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260903161553.528932-30-tejas.upadhyay@intel.com

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This commit is contained in:

Tejas Upadhyay 2026-09-03 21:46:06 +05:30 • committed by Matthew Brost

parent 6ff99f4335

commit fb19798cc3

4 changed files with 77 additions and 0 deletions

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3

drivers/gpu/drm/xe/xe_debugfs.c

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71

drivers/gpu/drm/xe/xe_ttm_vram_mgr.c

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1

drivers/gpu/drm/xe/xe_ttm_vram_mgr.h

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2

drivers/gpu/drm/xe/xe_ttm_vram_mgr_types.h

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