anv/descriptor_set: add reference counting for descriptor set layouts
The spec states that descriptor set layouts can be destroyed almost at any time: "VkDescriptorSetLayout objects may be accessed by commands that operate on descriptor sets allocated using that layout, and those descriptor sets must not be updated with vkUpdateDescriptorSets after the descriptor set layout has been destroyed. Otherwise, descriptor set layouts can be destroyed any time they are not in use by an API command." v2: allocate off the device allocator with DEVICE scope (Jason) Fixes the following work-in-progress CTS tests: dEQP-VK.api.descriptor_set.descriptor_set_layout_lifetime.graphics dEQP-VK.api.descriptor_set.descriptor_set_layout_lifetime.compute Suggested-by:Jason Ekstrand <jason@jlekstrand.net> Reviewed-by:
Jason Ekstrand <jason@jlekstrand.net>
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