diff options
| author | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2019-10-12 08:23:07 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-12 09:08:33 +0100 |
| commit | daed3e44396d178cf2098b754bb8ef5ca4e918bc (patch) | |
| tree | 4e800538072b8b2441e09743caa88f93bc0ea4e5 /drivers/gpu/drm/i915/i915_perf_types.h | |
| parent | 6a45008ab7bb5e13b543de0c141b94aaa71d8397 (diff) | |
drm/i915/perf: implement active wait for noa configurations
NOA configuration take some amount of time to apply. That amount of
time depends on the size of the GT. There is no documented time for
this. For example, past experimentations with powergating
configuration changes seem to indicate a 60~70us delay. We go with
500us as default for now which should be over the required amount of
time (according to HW architects).
v2: Don't forget to save/restore registers used for the wait (Chris)
v3: Name used CS_GPR registers (Chris)
Fix compile issue due to rebase (Lionel)
v4: Fix save/restore helpers (Umesh)
v5: Move noa_wait from drm_i915_private to i915_perf_stream (Lionel)
v6: Add missing struct declarations in i915_perf.h
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191012072308.30312-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_perf_types.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_perf_types.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h index 337cd7d2ad77..d35a3c1946c3 100644 --- a/drivers/gpu/drm/i915/i915_perf_types.h +++ b/drivers/gpu/drm/i915/i915_perf_types.h @@ -266,6 +266,12 @@ struct i915_perf_stream { */ u32 head; } oa_buffer; + + /** + * A batch buffer doing a wait on the GPU for the NOA logic to be + * reprogrammed. + */ + struct i915_vma *noa_wait; }; /** @@ -385,6 +391,8 @@ struct i915_perf { struct i915_oa_ops ops; const struct i915_oa_format *oa_formats; + + atomic64_t noa_programming_delay; }; #endif /* _I915_PERF_TYPES_H_ */ |