svga: Re-emit bound rendertargets and texture samplers at the beginning of every command buffer.

Only non null resources.

To ensure that relocations are emitted for every resource currently
referred.

src/gallium/drivers/svga/svga_context.c

@@ -214,6 +214,11 @@ void svga_context_flush( struct svga_context *svga,
 
    svga_screen_cache_flush(svgascreen, fence);
 
+   /* To force the reemission of rendertargets and texture bindings at
+    * the beginning of every command buffer.
+    */
+   svga->dirty |= SVGA_NEW_COMMAND_BUFFER;
+
    if (SVGA_DEBUG & DEBUG_SYNC) {
       if (fence)
          svga->pipe.screen->fence_finish( svga->pipe.screen, fence, 0);

src/gallium/drivers/svga/svga_context.h

@@ -382,6 +382,7 @@ struct svga_context
 #define SVGA_NEW_ZERO_STRIDE         0x2000000
 #define SVGA_NEW_TEXTURE_FLAGS       0x4000000
 #define SVGA_NEW_STENCIL_REF         0x8000000
+#define SVGA_NEW_COMMAND_BUFFER      0x10000000
 
 
 

src/gallium/drivers/svga/svga_state_framebuffer.c

@@ -43,15 +43,18 @@ static int emit_framebuffer( struct svga_context *svga,
 {
    const struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
    struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
+   boolean reemit = !!(dirty & SVGA_NEW_COMMAND_BUFFER);
    unsigned i;
    enum pipe_error ret;
 
-   /* XXX: Need shadow state in svga->hw to eliminate redundant
-    * uploads, especially of NULL buffers.
+   /*
+    * We need to reemit non-null surface bindings, even when they are not
+    * dirty, to ensure that the resources are paged in.
     */
    
    for(i = 0; i < PIPE_MAX_COLOR_BUFS; ++i) {
-      if (curr->cbufs[i] != hw->cbufs[i]) {
+      if (curr->cbufs[i] != hw->cbufs[i] ||
+          (reemit && hw->cbufs[i])) {
          if (svga->curr.nr_fbs++ > 8)
             return PIPE_ERROR_OUT_OF_MEMORY;
 
@@ -64,7 +67,8 @@ static int emit_framebuffer( struct svga_context *svga,
    }
 
    
-   if (curr->zsbuf != hw->zsbuf) {
+   if (curr->zsbuf != hw->zsbuf ||
+       (reemit && hw->zsbuf)) {
       ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_DEPTH, curr->zsbuf);
       if (ret != PIPE_OK)
          return ret;
@@ -92,7 +96,8 @@ static int emit_framebuffer( struct svga_context *svga,
 struct svga_tracked_state svga_hw_framebuffer = 
 {
    "hw framebuffer state",
-   SVGA_NEW_FRAME_BUFFER,
+   SVGA_NEW_FRAME_BUFFER |
+   SVGA_NEW_COMMAND_BUFFER,
    emit_framebuffer
 };
 

src/gallium/drivers/svga/svga_state_tss.c

@@ -56,6 +56,7 @@ static int
 update_tss_binding(struct svga_context *svga, 
                    unsigned dirty )
 {
+   boolean reemit = !!(dirty & SVGA_NEW_COMMAND_BUFFER);
    unsigned i;
    unsigned count = MAX2( svga->curr.num_sampler_views,
                           svga->state.hw_draw.num_views );
@@ -107,12 +108,18 @@ update_tss_binding(struct svga_context *svga,
                                                 max_lod);
       }
 
-      if (view->dirty) {
+      /*
+       * We need to reemit non-null texture bindings, even when they are not
+       * dirty, to ensure that the resources are paged in.
+       */
+
+      if (view->dirty ||
+          (reemit && view->v)) {
          queue.bind[queue.bind_count].unit = i;
          queue.bind[queue.bind_count].view = view;
          queue.bind_count++;
       } 
-      else if (view->v) {
+      if (!view->dirty && view->v) {
          svga_validate_sampler_view(svga, view->v);
       }
    }
@@ -160,7 +167,8 @@ fail:
 struct svga_tracked_state svga_hw_tss_binding = {
    "texture binding emit",
    SVGA_NEW_TEXTURE_BINDING |
-   SVGA_NEW_SAMPLER,
+   SVGA_NEW_SAMPLER |
+   SVGA_NEW_COMMAND_BUFFER,
    update_tss_binding
 };