venus: expose vn_feedback_buffer_create()

For query pool feedback, which are variable in size depending on the
query type and being contiguous will allow for simpler copies/clears.

Signed-off-by: Juston Li <justonli@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23348>

src/virtio/vulkan/vn_feedback.c

@@ -10,15 +10,6 @@
 #include "vn_physical_device.h"
 #include "vn_queue.h"
 
-/* coherent buffer with bound and mapped memory */
-struct vn_feedback_buffer {
-   VkBuffer buffer;
-   VkDeviceMemory memory;
-   void *data;
-
-   struct list_head head;
-};
-
 static uint32_t
 vn_get_memory_type_index(const VkPhysicalDeviceMemoryProperties *mem_props,
                          uint32_t mem_type_bits,
@@ -35,7 +26,7 @@ vn_get_memory_type_index(const VkPhysicalDeviceMemoryProperties *mem_props,
    return UINT32_MAX;
 }
 
-static VkResult
+VkResult
 vn_feedback_buffer_create(struct vn_device *dev,
                           uint32_t size,
                           const VkAllocationCallbacks *alloc,
@@ -128,7 +119,7 @@ out_free_feedback_buf:
    return result;
 }
 
-static void
+void
 vn_feedback_buffer_destroy(struct vn_device *dev,
                            struct vn_feedback_buffer *feedback_buf,
                            const VkAllocationCallbacks *alloc)

src/virtio/vulkan/vn_feedback.h

@@ -55,6 +55,15 @@ struct vn_feedback_cmd_pool {
    VkCommandPool pool;
 };
 
+/* coherent buffer with bound and mapped memory */
+struct vn_feedback_buffer {
+   VkBuffer buffer;
+   VkDeviceMemory memory;
+   void *data;
+
+   struct list_head head;
+};
+
 VkResult
 vn_feedback_pool_init(struct vn_device *dev,
                       struct vn_feedback_pool *pool,
@@ -109,6 +118,17 @@ vn_feedback_set_counter(struct vn_feedback_slot *slot, uint64_t counter)
    *slot->counter = counter;
 }
 
+VkResult
+vn_feedback_buffer_create(struct vn_device *dev,
+                          uint32_t size,
+                          const VkAllocationCallbacks *alloc,
+                          struct vn_feedback_buffer **out_feedback_buf);
+
+void
+vn_feedback_buffer_destroy(struct vn_device *dev,
+                           struct vn_feedback_buffer *feedback_buf,
+                           const VkAllocationCallbacks *alloc);
+
 void
 vn_feedback_event_cmd_record(VkCommandBuffer cmd_handle,
                              VkEvent ev_handle,