Mesa (master): svga: add a few minor comments

[Brian Paul]

Module: Mesa
Branch: master
Commit: d6cb912d65c9f3790f0b93afa9fb185c739add22
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d6cb912d65c9f3790f0b93afa9fb185c739add22

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Jun 16 16:34:43 2017 -0600

svga: add a few minor comments

Trivial.

---

 src/gallium/drivers/svga/svga_resource_buffer_upload.c | 5 ++++-
 src/gallium/drivers/svga/svga_screen_cache.c           | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/svga/svga_resource_buffer_upload.c b/src/gallium/drivers/svga/svga_resource_buffer_upload.c
index 9d93b48fd3..1b82dbac0d 100644
--- a/src/gallium/drivers/svga/svga_resource_buffer_upload.c
+++ b/src/gallium/drivers/svga/svga_resource_buffer_upload.c
@@ -138,7 +138,10 @@ svga_buffer_create_hw_storage(struct svga_screen *ss,
 }
 
 
-
+/**
+ * Allocate graphics memory for vertex/index/constant/etc buffer (not
+ * textures).
+ */
 enum pipe_error
 svga_buffer_create_host_surface(struct svga_screen *ss,
                                 struct svga_buffer *sbuf)
diff --git a/src/gallium/drivers/svga/svga_screen_cache.c b/src/gallium/drivers/svga/svga_screen_cache.c
index 82d2ebce97..bf66fc6010 100644
--- a/src/gallium/drivers/svga/svga_screen_cache.c
+++ b/src/gallium/drivers/svga/svga_screen_cache.c
@@ -461,6 +461,7 @@ svga_screen_surface_create(struct svga_screen *svgascreen,
             key->cachable);
 
    if (cachable) {
+      /* Try to re-cycle a previously freed, cached surface */
       if (key->format == SVGA3D_BUFFER) {
          SVGA3dSurfaceFlags hint_flag;
 
@@ -521,6 +522,7 @@ svga_screen_surface_create(struct svga_screen *svgascreen,
    }
 
    if (!handle) {
+      /* Unable to recycle surface, allocate a new one */
       unsigned usage = 0;
 
       if (!key->cachable)