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author | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2020-03-17 15:22:22 +0200 |
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committer | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2020-03-17 15:27:55 +0200 |
commit | 11ecbdddf2f8b6cc2480aff6d877b7a4076e3b7f (patch) | |
tree | 650e56f498639b5b5a059011be2b85faecf70c6b /drivers/gpu/drm/i915/gem/i915_gem_context.h | |
parent | 371aba6e26fbc41009ef100559e07d7e884d382a (diff) | |
download | linux-11ecbdddf2f8b6cc2480aff6d877b7a4076e3b7f.tar.bz2 |
drm/i915/perf: introduce global sseu pinning
On Gen11 powergating half the execution units is a functional
requirement when using the VME samplers. Not fullfilling this
requirement can lead to hangs.
This unfortunately plays fairly poorly with the NOA requirements. NOA
requires a stable power configuration to maintain its configuration.
As a result using OA (and NOA feeding into it) so far has required us
to use a power configuration that can work for all contexts. The only
power configuration fullfilling this is powergating half the execution
units.
This makes performance analysis for 3D workloads somewhat pointless.
Failing to find a solution that would work for everybody, this change
introduces a new i915-perf stream open parameter that punts the
decision off to userspace. If this parameter is omitted, the existing
Gen11 behavior remains (half EU array powergating).
This change takes the initiative to move all perf related sseu
configuration into i915_perf.c
v2: Make parameter priviliged if different from default
v3: Fix context modifying its sseu config while i915-perf is enabled
v4: Always consider global sseu a privileged operation (Tvrtko)
Override req_sseu point in intel_sseu_make_rpcs() (Tvrtko)
Remove unrelated changes (Tvrtko)
v5: Some typos (Tvrtko)
Process sseu param in read_properties_unlocked() (Tvrtko)
v6: Actually commit the bits from v5...
Fixup some checkpath warnings
v7: Only compare engine uabi field (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200317132222.2638719-3-lionel.g.landwerlin@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_context.h')
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_context.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.h b/drivers/gpu/drm/i915/gem/i915_gem_context.h index f1d884d304bd..3702b2fb27ab 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.h @@ -225,4 +225,8 @@ i915_gem_engines_iter_next(struct i915_gem_engines_iter *it); struct i915_lut_handle *i915_lut_handle_alloc(void); void i915_lut_handle_free(struct i915_lut_handle *lut); +int i915_gem_user_to_context_sseu(struct drm_i915_private *i915, + const struct drm_i915_gem_context_param_sseu *user, + struct intel_sseu *context); + #endif /* !__I915_GEM_CONTEXT_H__ */ |