mesa: add gl_constants::AllowMappedBuffersDuringExecution

for skipping mapped-buffer checking in every GL draw call

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/mesa/main/mtypes.h

@@ -3908,6 +3908,9 @@ struct gl_constants
 
    /** Used as an input for sha1 generation in the on-disk shader cache */
    unsigned char *dri_config_options_sha1;
+
+   /** When drivers are OK with mapped buffers during draw and other calls. */
+   bool AllowMappedBuffersDuringExecution;
 };
 
 

src/mesa/state_tracker/st_extensions.c

@@ -463,6 +463,9 @@ void st_init_limits(struct pipe_screen *screen,
 
    c->SparseBufferPageSize =
       screen->get_param(screen, PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE);
+
+   c->AllowMappedBuffersDuringExecution =
+      screen->get_param(screen, PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION);
 }