r300g,r600g,radeonsi: add support for ARB_buffer_storage

All GTT memory mappings are coherent and therefore can be persistent.

Reviewed-by: Fredrik Höglund <[email protected]>

2 files changed, 6 insertions, 0 deletions

diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index 26d73e47ccd..0977d3920a3 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -106,6 +106,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_USER_INDEX_BUFFERS:
         case PIPE_CAP_USER_CONSTANT_BUFFERS:
         case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
+        case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
             return 1;
 
         case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 048672c5f61..5472263781e 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -2129,6 +2129,10 @@ static void r300_texture_barrier(struct pipe_context *pipe)
     r300_mark_atom_dirty(r300, &r300->texture_cache_inval);
 }
 
+static void r300_memory_barrier(struct pipe_context *pipe, unsigned flags)
+{
+}
+
 void r300_init_state_functions(struct r300_context* r300)
 {
     r300->context.create_blend_state = r300_create_blend_state;
@@ -2189,4 +2193,5 @@ void r300_init_state_functions(struct r300_context* r300)
     r300->context.delete_vs_state = r300_delete_vs_state;
 
     r300->context.texture_barrier = r300_texture_barrier;
+    r300->context.memory_barrier = r300_memory_barrier;
 }