vulkan/meta: Add key types

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>

src/vulkan/runtime/vk_meta.c

@@ -134,6 +134,10 @@ vk_meta_lookup_object(struct vk_meta_device *meta,
                       VkObjectType obj_type,
                       const void *key_data, size_t key_size)
 {
+   assert(key_size >= sizeof(enum vk_meta_object_key_type));
+   assert(*(enum vk_meta_object_key_type *)key_data !=
+          VK_META_OBJECT_KEY_TYPE_INVALD);
+
    struct cache_key key = {
       .obj_type = obj_type,
       .key_size = key_size,
@@ -163,6 +167,10 @@ vk_meta_cache_object(struct vk_device *device,
                      VkObjectType obj_type,
                      uint64_t handle)
 {
+   assert(key_size >= sizeof(enum vk_meta_object_key_type));
+   assert(*(enum vk_meta_object_key_type *)key_data !=
+          VK_META_OBJECT_KEY_TYPE_INVALD);
+
    struct cache_key *key = cache_key_create(obj_type, key_data, key_size);
    struct vk_object_base *obj =
       vk_object_base_from_u64_handle(handle, obj_type);

src/vulkan/runtime/vk_meta.h

@@ -74,6 +74,13 @@ VkResult vk_meta_device_init(struct vk_device *device,
 void vk_meta_device_finish(struct vk_device *device,
                            struct vk_meta_device *meta);
 
+/** Keys should start with one of these to ensure uniqueness */
+enum vk_meta_object_key_type {
+   VK_META_OBJECT_KEY_TYPE_INVALD = 0,
+   VK_META_OBJECT_KEY_CLEAR_PIPELINE,
+   VK_META_OBJECT_KEY_BLIT_PIPELINE,
+};
+
 uint64_t vk_meta_lookup_object(struct vk_meta_device *meta,
                                 VkObjectType obj_type,
                                 const void *key_data, size_t key_size);

src/vulkan/runtime/vk_meta_clear.c

@@ -33,6 +33,7 @@
 #include "nir_builder.h"
 
 struct vk_meta_clear_key {
+   enum vk_meta_object_key_type key_type;
    struct vk_meta_rendering_info render;
    uint8_t color_attachments_cleared;
    bool clear_depth;
@@ -208,6 +209,7 @@ vk_meta_clear_attachments(struct vk_command_buffer *cmd,
 
    struct vk_meta_clear_key key;
    memset(&key, 0, sizeof(key));
+   key.key_type = VK_META_OBJECT_KEY_CLEAR_PIPELINE;
    vk_meta_rendering_info_copy(&key.render, render);
 
    struct vk_meta_clear_push_data push = {0};