svga: Ensure pending drawing commands other surface operations are emitted before DMAs.

This behavior was last when moving the transfers to the contexts.

This fixes several piglit failures, which were reading the color renderbuffer
before the draw operations were emitted.

8 files changed, 40 insertions, 17 deletions

diff --git a/src/gallium/drivers/svga/svga_context.c b/src/gallium/drivers/svga/svga_context.c
index 9bcf6571bd3..9b737a187e7 100644
--- a/src/gallium/drivers/svga/svga_context.c
+++ b/src/gallium/drivers/svga/svga_context.c
@@ -34,6 +34,7 @@
 
 #include "svga_context.h"
 #include "svga_screen.h"
+#include "svga_surface.h"
 #include "svga_resource_texture.h"
 #include "svga_resource_buffer.h"
 #include "svga_resource.h"
@@ -247,6 +248,30 @@ void svga_hwtnl_flush_retry( struct svga_context *svga )
    assert(ret == 0);
 }
 
+
+/* Emit all operations pending on host surfaces.
+ */ 
+void svga_surfaces_flush(struct svga_context *svga)
+{
+   unsigned i;
+
+   /* Emit buffered drawing commands.
+    */
+   svga_hwtnl_flush_retry( svga );
+
+   /* Emit back-copy from render target view to texture.
+    */
+   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
+      if (svga->curr.framebuffer.cbufs[i])
+         svga_propagate_surface(svga, svga->curr.framebuffer.cbufs[i]);
+   }
+
+   if (svga->curr.framebuffer.zsbuf)
+      svga_propagate_surface(svga, svga->curr.framebuffer.zsbuf);
+
+}
+
+
 struct svga_winsys_context *
 svga_winsys_context( struct pipe_context *pipe )
 {
diff --git a/src/gallium/drivers/svga/svga_context.h b/src/gallium/drivers/svga/svga_context.h
index 4d4f50366ea..7b36a3606e0 100644
--- a/src/gallium/drivers/svga/svga_context.h
+++ b/src/gallium/drivers/svga/svga_context.h
@@ -453,6 +453,8 @@ void svga_context_flush( struct svga_context *svga,
 
 void svga_hwtnl_flush_retry( struct svga_context *svga );
 
+void svga_surfaces_flush(struct svga_context *svga);
+
 struct pipe_context *
 svga_context_create(struct pipe_screen *screen,
 		    void *priv);
diff --git a/src/gallium/drivers/svga/svga_pipe_blit.c b/src/gallium/drivers/svga/svga_pipe_blit.c
index 426698806c8..c87afb6946c 100644
--- a/src/gallium/drivers/svga/svga_pipe_blit.c
+++ b/src/gallium/drivers/svga/svga_pipe_blit.c
@@ -50,7 +50,9 @@ static void svga_surface_copy(struct pipe_context *pipe,
    struct pipe_surface *srcsurf, *dstsurf;*/
    unsigned dst_face, dst_z, src_face, src_z;
 
-   svga_hwtnl_flush_retry( svga );
+   /* Emit buffered drawing commands, and any back copies.
+    */
+   svga_surfaces_flush( svga );
 
 #if 0
    srcsurf = screen->get_tex_surface(screen, src_tex,
diff --git a/src/gallium/drivers/svga/svga_pipe_flush.c b/src/gallium/drivers/svga/svga_pipe_flush.c
index 6c69d29d15e..9357d827f28 100644
--- a/src/gallium/drivers/svga/svga_pipe_flush.c
+++ b/src/gallium/drivers/svga/svga_pipe_flush.c
@@ -36,20 +36,10 @@ static void svga_flush( struct pipe_context *pipe,
                         struct pipe_fence_handle **fence )
 {
    struct svga_context *svga = svga_context(pipe);
-   int i;
 
-   /* Emit buffered drawing commands.
+   /* Emit buffered drawing commands, and any back copies.
     */
-   svga_hwtnl_flush_retry( svga );
-
-   /* Emit back-copy from render target view to texture.
-    */
-   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
-      if (svga->curr.framebuffer.cbufs[i])
-         svga_propagate_surface(pipe, svga->curr.framebuffer.cbufs[i]);
-   }
-   if (svga->curr.framebuffer.zsbuf)
-      svga_propagate_surface(pipe, svga->curr.framebuffer.zsbuf);
+   svga_surfaces_flush( svga );
 
    /* Flush command queue.
     */
diff --git a/src/gallium/drivers/svga/svga_pipe_misc.c b/src/gallium/drivers/svga/svga_pipe_misc.c
index 8c24fb302f7..440919c6262 100644
--- a/src/gallium/drivers/svga/svga_pipe_misc.c
+++ b/src/gallium/drivers/svga/svga_pipe_misc.c
@@ -94,7 +94,7 @@ static void svga_set_framebuffer_state(struct pipe_context *pipe,
    
       for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
          if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])
-            svga_propagate_surface(pipe, dst->cbufs[i]);
+            svga_propagate_surface(svga, dst->cbufs[i]);
    }
 
    /* XXX: Actually the virtual hardware may support rendertargets with
diff --git a/src/gallium/drivers/svga/svga_resource_texture.c b/src/gallium/drivers/svga/svga_resource_texture.c
index 3bb6ecf81f0..994f30719ae 100644
--- a/src/gallium/drivers/svga/svga_resource_texture.c
+++ b/src/gallium/drivers/svga/svga_resource_texture.c
@@ -215,6 +215,10 @@ svga_transfer_dma(struct svga_context *svga,
       SVGA_DBG(DEBUG_PERF, "%s: readback transfer\n", __FUNCTION__);
    }
 
+   /* Ensure any pending operations on host surfaces are queued on the command
+    * buffer first.
+    */
+   svga_surfaces_flush( svga );
 
    if(!st->swbuf) {
       /* Do the DMA transfer in a single go */
diff --git a/src/gallium/drivers/svga/svga_surface.c b/src/gallium/drivers/svga/svga_surface.c
index 0cb58e66111..df18a560a62 100644
--- a/src/gallium/drivers/svga/svga_surface.c
+++ b/src/gallium/drivers/svga/svga_surface.c
@@ -340,7 +340,7 @@ void svga_mark_surfaces_dirty(struct svga_context *svga)
  * pipe is optional context to inline the blit command in.
  */
 void
-svga_propagate_surface(struct pipe_context *pipe, struct pipe_surface *surf)
+svga_propagate_surface(struct svga_context *svga, struct pipe_surface *surf)
 {
    struct svga_surface *s = svga_surface(surf);
    struct svga_texture *tex = svga_texture(surf->texture);
@@ -365,7 +365,7 @@ svga_propagate_surface(struct pipe_context *pipe, struct pipe_surface *surf)
 
    if (s->handle != tex->handle) {
       SVGA_DBG(DEBUG_VIEWS, "svga: Surface propagate: tex %p, level %u, from %p\n", tex, surf->u.tex.level, surf);
-      svga_texture_copy_handle(svga_context(pipe),
+      svga_texture_copy_handle(svga,
                                s->handle, 0, 0, 0, s->real_level, s->real_face,
                                tex->handle, 0, 0, zslice, surf->u.tex.level, face,
                                u_minify(tex->b.b.width0, surf->u.tex.level),
diff --git a/src/gallium/drivers/svga/svga_surface.h b/src/gallium/drivers/svga/svga_surface.h
index 755121945de..04166f1fca2 100644
--- a/src/gallium/drivers/svga/svga_surface.h
+++ b/src/gallium/drivers/svga/svga_surface.h
@@ -56,7 +56,7 @@ struct svga_surface
 
 
 extern void
-svga_propagate_surface(struct pipe_context *pipe, struct pipe_surface *surf);
+svga_propagate_surface(struct svga_context *svga, struct pipe_surface *surf);
 
 extern boolean
 svga_surface_needs_propagation(struct pipe_surface *surf);