[Mesa-dev] [PATCH 1/6] anv: Be more careful about hashing pipeline layouts

[Jason Ekstrand]

Previously, we just hashed the entire descriptor set layout verbatim.
This meant that a bunch of extra stuff such as pointers and reference
counts made its way into the cache.  It also meant that we weren't
properly hashing in the Y'CbCr conversion information information from
bound immutable samplers.

Cc: mesa-stable at lists.freedesktop.org
---
 src/intel/vulkan/anv_descriptor_set.c | 41 +++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/src/intel/vulkan/anv_descriptor_set.c b/src/intel/vulkan/anv_descriptor_set.c
index 9534ba81cdb..8f7f1f3ba38 100644
--- a/src/intel/vulkan/anv_descriptor_set.c
+++ b/src/intel/vulkan/anv_descriptor_set.c
@@ -257,13 +257,48 @@ void anv_DestroyDescriptorSetLayout(
    anv_descriptor_set_layout_unref(device, set_layout);
 }
 
+#define SHA1_UPDATE_VALUE(ctx, x) _mesa_sha1_update(ctx, &(x), sizeof(x));
+
+static void
+sha1_update_immutable_sampler(struct mesa_sha1 *ctx,
+                              const struct anv_sampler *sampler)
+{
+   if (!sampler->conversion)
+      return;
+
+   /* The only thing that affects the shader is ycbcr conversion */
+   _mesa_sha1_update(ctx, sampler->conversion,
+                     sizeof(*sampler->conversion));
+}
+
+static void
+sha1_update_descriptor_set_binding_layout(struct mesa_sha1 *ctx,
+   const struct anv_descriptor_set_binding_layout *layout)
+{
+   SHA1_UPDATE_VALUE(ctx, layout->array_size);
+   SHA1_UPDATE_VALUE(ctx, layout->descriptor_index);
+   SHA1_UPDATE_VALUE(ctx, layout->dynamic_offset_index);
+   SHA1_UPDATE_VALUE(ctx, layout->buffer_index);
+   _mesa_sha1_update(ctx, layout->stage, sizeof(layout->stage));
+
+   if (layout->immutable_samplers) {
+      for (uint16_t i = 0; i < layout->array_size; i++)
+         sha1_update_immutable_sampler(ctx, layout->immutable_samplers[i]);
+   }
+}
+
 static void
 sha1_update_descriptor_set_layout(struct mesa_sha1 *ctx,
                                   const struct anv_descriptor_set_layout *layout)
 {
-   size_t size = sizeof(*layout) +
-                 sizeof(layout->binding[0]) * layout->binding_count;
-   _mesa_sha1_update(ctx, layout, size);
+   SHA1_UPDATE_VALUE(ctx, layout->binding_count);
+   SHA1_UPDATE_VALUE(ctx, layout->size);
+   SHA1_UPDATE_VALUE(ctx, layout->shader_stages);
+   SHA1_UPDATE_VALUE(ctx, layout->buffer_count);
+   SHA1_UPDATE_VALUE(ctx, layout->dynamic_offset_count);
+
+   for (uint16_t i = 0; i < layout->binding_count; i++)
+      sha1_update_descriptor_set_binding_layout(ctx, &layout->binding[i]);
 }
 
 /*
-- 
2.17.1