gallium: add interface for querying memory usage and sizes (v2)

If you're worried about the duplication of some CAPs, we can remove them
later.

v2: add fields for memory eviction stats

Reviewed-by: Ilia Mirkin <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>

3 files changed, 20 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 75b9bf930b0..800f16cd250 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -651,6 +651,7 @@ enum pipe_cap
    PIPE_CAP_STRING_MARKER,
    PIPE_CAP_SURFACE_REINTERPRET_BLOCKS,
    PIPE_CAP_QUERY_BUFFER_OBJECT,
+   PIPE_CAP_QUERY_MEMORY_INFO,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index f868d71db23..211bc2440f9 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -57,6 +57,7 @@ struct pipe_resource;
 struct pipe_surface;
 struct pipe_transfer;
 struct pipe_box;
+struct pipe_memory_info;
 
 
 /**
@@ -260,6 +261,11 @@ struct pipe_screen {
                                       unsigned index,
                                       struct pipe_driver_query_group_info *info);
 
+   /**
+    * Query information about memory usage.
+    */
+   void (*query_memory_info)(struct pipe_screen *screen,
+                             struct pipe_memory_info *info);
 };
 
 
diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index 2e4d2830199..ed62a33ad72 100644
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -720,6 +720,19 @@ struct pipe_debug_callback
    void *data;
 };
 
+/**
+ * Information about memory usage. All sizes are in kilobytes.
+ */
+struct pipe_memory_info
+{
+   unsigned total_device_memory; /**< size of device memory, e.g. VRAM */
+   unsigned avail_device_memory; /**< free device memory at the moment */
+   unsigned total_staging_memory; /**< size of staging memory, e.g. GART */
+   unsigned avail_staging_memory; /**< free staging memory at the moment */
+   unsigned device_memory_evicted; /**< size of memory evicted (monotonic counter) */
+   unsigned nr_device_memory_evictions; /**< # of evictions (monotonic counter) */
+};
+
 #ifdef __cplusplus
 }
 #endif