radeonsi: document what si_descriptors.c does

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_descriptors.c b/src/gallium/drivers/radeonsi/si_descriptors.c
index 792d2c3a9de011f12017f4535048db5d9aee1134..254305231dc7577b137f789d4b3f64b8f724d3e8 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_descriptors.c
+++ b/src/gallium/drivers/radeonsi/si_descriptors.c
@@ -23,6 +23,17 @@
  * Authors:
  *      Marek Olšák <marek.olsak@amd.com>
  */
+
+/* Resource binding slots and sampler states (each described with 8 or 4 dwords)
+ * live in memory on SI.
+ *
+ * This file is responsible for managing lists of resources and sampler states
+ * in memory and binding them, which means updating those structures in memory.
+ *
+ * There is also code for updating shader pointers to resources and sampler
+ * states. CP DMA functions are here too.
+ */
+
 #include "radeon/r600_cs.h"
 #include "si_pipe.h"
 #include "si_shader.h"