drm/i915/guc: Speed up GuC log dumps

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Add support for telling the debugfs interface the size of the GuC log
dump in advance. Without that, the underlying framework keeps calling
the 'show' function with larger and larger buffer allocations until it
fits. That means reading the log from graphics memory many times - 16
times with the full 18MB log size.

v2: Don't return error codes from size query. Report overflow in the
error dump as well (review feedback from Daniele).

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211211065859.2248188-2-John.C.Harrison@Intel.com

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This commit is contained in:

John Harrison 2021-12-10 22:58:56 -08:00

parent 9606ca2ea1

commit 57b427a705

2 changed files with 71 additions and 8 deletions

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21

drivers/gpu/drm/i915/gt/intel_gt_debugfs.h

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58

drivers/gpu/drm/i915/gt/uc/intel_guc_log_debugfs.c

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