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drm/i915: Use same test for eviction and submitting kernel context

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During evict, we wish to idle the GPU if we see that the GGTT is full.
However, our test for idle in i915_gem_evict_something() and in
i915_gem_switch_to_kernel_context() do not match leading to
disappointment - we never believe that we are idle and keep trying to
flush the GGTT ad infinitum.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103438
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171024220855.30155-2-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Chris Wilson 2017-10-24 23:08:55 +01:00
parent b1f9107e1b
commit 20ccd4d3f6
4 changed files with 13 additions and 5 deletions
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7
drivers/gpu/drm/i915/i915_gem_context.c
View file

@ -897,7 +897,7 @@ int i915_switch_context(struct drm_i915_gem_request *req)
return do_rcs_switch(req);
}
static bool engine_has_kernel_context(struct intel_engine_cs *engine)
static bool engine_has_idle_kernel_context(struct intel_engine_cs *engine)
{
struct i915_gem_timeline *timeline;
@ -913,8 +913,7 @@ static bool engine_has_kernel_context(struct intel_engine_cs *engine)
return false;
}
return (!engine->last_retired_context ||
i915_gem_context_is_kernel(engine->last_retired_context));
return intel_engine_has_kernel_context(engine);
}
int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv)
@ -931,7 +930,7 @@ int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv)
struct drm_i915_gem_request *req;
int ret;
if (engine_has_kernel_context(engine))
if (engine_has_idle_kernel_context(engine))
continue;
req = i915_gem_request_alloc(engine, dev_priv->kernel_context);

3
drivers/gpu/drm/i915/i915_gem_evict.c
View file

@ -46,7 +46,7 @@ static bool ggtt_is_idle(struct drm_i915_private *i915)
return false;
for_each_engine(engine, i915, id) {
if (engine->last_retired_context != i915->kernel_context)
if (!intel_engine_has_kernel_context(engine))
return false;
}
@ -73,6 +73,7 @@ static int ggtt_flush(struct drm_i915_private *i915)
if (err)
return err;
GEM_BUG_ON(!ggtt_is_idle(i915));
return 0;
}

6
drivers/gpu/drm/i915/intel_engine_cs.c
View file

@ -1585,6 +1585,12 @@ bool intel_engines_are_idle(struct drm_i915_private *dev_priv)
return true;
}
bool intel_engine_has_kernel_context(const struct intel_engine_cs *engine)
{
return (!engine->last_retired_context ||
i915_gem_context_is_kernel(engine->last_retired_context));
}
void intel_engines_reset_default_submission(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;

2
drivers/gpu/drm/i915/intel_ringbuffer.h
View file

@ -866,6 +866,8 @@ static inline u32 *gen8_emit_pipe_control(u32 *batch, u32 flags, u32 offset)
bool intel_engine_is_idle(struct intel_engine_cs *engine);
bool intel_engines_are_idle(struct drm_i915_private *dev_priv);
bool intel_engine_has_kernel_context(const struct intel_engine_cs *engine);
void intel_engines_mark_idle(struct drm_i915_private *i915);
void intel_engines_reset_default_submission(struct drm_i915_private *i915);