[Intel-gfx] [PATCH 3/6] drm/i915: Mark all default contexts as uninitialised after context loss

[Chris Wilson]

When the GPU is reset or state lost through suspend, every default
legacy context needs to reload their state - both the golden render
state and the L3 mapping. Only context images explicitly saved to memory
(i.e. all execlists and non-default legacy contexts) will retain their
state across the reset.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_context.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 3e3acd054f05..62de72a947e5 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -470,7 +470,21 @@ void i915_gem_context_lost(struct drm_i915_private *dev_priv)
 		}
 	}
 
-	/* Force the GPU state to be restore on enabling */
+	/* Force the GPU state to be restored on enabling */
+	if (!i915.enable_execlists) {
+		struct i915_gem_context *ctx;
+
+		list_for_each_entry(ctx, &dev_priv->context_list, link) {
+			if (!i915_gem_context_is_default(ctx))
+				continue;
+
+			for_each_engine(engine, dev_priv)
+				ctx->engine[engine->id].initialised = false;
+
+			ctx->remap_slice = ALL_L3_SLICES(dev_priv);
+		}
+	}
+
 	for_each_engine(engine, dev_priv) {
 		struct intel_context *ce =
 			&dev_priv->kernel_context->engine[engine->id];
@@ -478,7 +492,6 @@ void i915_gem_context_lost(struct drm_i915_private *dev_priv)
 		ce->initialised =
 			!i915.enable_execlists || engine->init_context == NULL;
 	}
-	dev_priv->kernel_context->remap_slice = ALL_L3_SLICES(dev_priv);
 }
 
 void i915_gem_context_fini(struct drm_device *dev)
-- 
2.8.1