nvk: Implement descriptorBufferPushDescriptors

The only thing we really need to do here is to make sure we don't try
to use the EDB path for push descriptors since those aren't really
descriptor buffers.

Backport-to: 25.0
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33589>

src/nouveau/vulkan/nvk_nir_lower_descriptors.c

@@ -964,8 +964,10 @@ is_edb_buffer_view(nir_deref_instr *deref,
    nir_variable *var = nir_deref_instr_get_variable(deref);
    uint8_t set = var->data.descriptor_set;
 
-   return ctx->set_layouts[set]->flags &
-          VK_DESCRIPTOR_SET_LAYOUT_CREATE_DESCRIPTOR_BUFFER_BIT_EXT;
+   return (ctx->set_layouts[set]->flags &
+           VK_DESCRIPTOR_SET_LAYOUT_CREATE_DESCRIPTOR_BUFFER_BIT_EXT) &&
+          !(ctx->set_layouts[set]->flags &
+            VK_DESCRIPTOR_SET_LAYOUT_CREATE_PUSH_DESCRIPTOR_BIT);
 }
 
 static nir_def *

src/nouveau/vulkan/nvk_physical_device.c

@@ -552,7 +552,7 @@ nvk_get_device_features(const struct nv_device_info *info,
       .descriptorBuffer = true,
       .descriptorBufferCaptureReplay = true,
       .descriptorBufferImageLayoutIgnored = true,
-      .descriptorBufferPushDescriptors = false,
+      .descriptorBufferPushDescriptors = true,
 
       /* VK_EXT_device_generated_commands */
       .deviceGeneratedCommands = true,
@@ -984,7 +984,7 @@ nvk_get_device_properties(const struct nvk_instance *instance,
 
       /* VK_EXT_descriptor_buffer */
       .combinedImageSamplerDescriptorSingleArray = true,
-      .bufferlessPushDescriptors = false,
+      .bufferlessPushDescriptors = true,
       .allowSamplerImageViewPostSubmitCreation = false,
       .descriptorBufferOffsetAlignment = nvk_min_cbuf_alignment(info),
       .maxDescriptorBufferBindings = 32,