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drm/i915: Check engine->default_state mapping on module load 

Check we can indeed acquire a WB mapping of the context image on module
load. Later this will give us the opportunity to validate that we can
switch from WC to WB as required.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180914123504.2062-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-09-14 13:35:03 +01:00
parent dee60ca1f3
commit 37d7c9cc2e
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/i915_gem.c
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@ -5416,6 +5416,7 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915)
for_each_engine(engine, i915, id) {
struct i915_vma *state;
void *vaddr;
state = to_intel_context(ctx, engine)->state;
if (!state)
@ -5438,6 +5439,16 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915)
goto err_active;
engine->default_state = i915_gem_object_get(state->obj);
/* Check we can acquire the image of the context state */
vaddr = i915_gem_object_pin_map(engine->default_state,
I915_MAP_WB);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_active;
}
i915_gem_object_unpin_map(engine->default_state);
}
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) {