i965: directly write wm state to batch

As we write directly into the batch in system memory, we do not need to
write first to the stack (as was to avoid read back through the GTT)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 48 insertions, 63 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 601bbc7b1a..2932627c75 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -188,45 +188,42 @@ brw_update_texture_surface( struct gl_context *ctx, GLuint unit )
    struct intel_texture_object *intelObj = intel_texture_object(tObj);
    struct gl_texture_image *firstImage = tObj->Image[0][tObj->BaseLevel];
    const GLuint surf_index = SURF_INDEX_TEXTURE(unit);
-   struct brw_surface_state surf;
-   void *map;
+   struct brw_surface_state *surf;
 
-   memset(&surf, 0, sizeof(surf));
+   surf = brw_state_batch(brw, sizeof(*surf), 32,
+			 &brw->wm.surf_bo[surf_index],
+			 &brw->wm.surf_offset[surf_index]);
+   memset(surf, 0, sizeof(*surf));
 
-   surf.ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
-   surf.ss0.surface_type = translate_tex_target(tObj->Target);
-   surf.ss0.surface_format = translate_tex_format(firstImage->TexFormat,
+   surf->ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
+   surf->ss0.surface_type = translate_tex_target(tObj->Target);
+   surf->ss0.surface_format = translate_tex_format(firstImage->TexFormat,
 						  firstImage->InternalFormat,
 						  tObj->DepthMode, tObj->sRGBDecode);
 
    /* This is ok for all textures with channel width 8bit or less:
     */
-/*    surf.ss0.data_return_format = BRW_SURFACERETURNFORMAT_S1; */
-   surf.ss1.base_addr = intelObj->mt->region->buffer->offset; /* reloc */
+/*    surf->ss0.data_return_format = BRW_SURFACERETURNFORMAT_S1; */
+   surf->ss1.base_addr = intelObj->mt->region->buffer->offset; /* reloc */
 
-   surf.ss2.mip_count = intelObj->_MaxLevel - tObj->BaseLevel;
-   surf.ss2.width = firstImage->Width - 1;
-   surf.ss2.height = firstImage->Height - 1;
-   brw_set_surface_tiling(&surf, intelObj->mt->region->tiling);
-   surf.ss3.pitch = (intelObj->mt->region->pitch * intelObj->mt->cpp) - 1;
-   surf.ss3.depth = firstImage->Depth - 1;
+   surf->ss2.mip_count = intelObj->_MaxLevel - tObj->BaseLevel;
+   surf->ss2.width = firstImage->Width - 1;
+   surf->ss2.height = firstImage->Height - 1;
+   brw_set_surface_tiling(surf, intelObj->mt->region->tiling);
+   surf->ss3.pitch = (intelObj->mt->region->pitch * intelObj->mt->cpp) - 1;
+   surf->ss3.depth = firstImage->Depth - 1;
 
-   surf.ss4.min_lod = 0;
+   surf->ss4.min_lod = 0;
  
    if (tObj->Target == GL_TEXTURE_CUBE_MAP) {
-      surf.ss0.cube_pos_x = 1;
-      surf.ss0.cube_pos_y = 1;
-      surf.ss0.cube_pos_z = 1;
-      surf.ss0.cube_neg_x = 1;
-      surf.ss0.cube_neg_y = 1;
-      surf.ss0.cube_neg_z = 1;
+      surf->ss0.cube_pos_x = 1;
+      surf->ss0.cube_pos_y = 1;
+      surf->ss0.cube_pos_z = 1;
+      surf->ss0.cube_neg_x = 1;
+      surf->ss0.cube_neg_y = 1;
+      surf->ss0.cube_neg_z = 1;
    }
 
-   map = brw_state_batch(brw, sizeof(surf), 32,
-			 &brw->wm.surf_bo[surf_index],
-			 &brw->wm.surf_offset[surf_index]);
-   memcpy(map, &surf, sizeof(surf));
-
    /* Emit relocation to surface contents */
    drm_intel_bo_emit_reloc(brw->wm.surf_bo[surf_index],
 			   brw->wm.surf_offset[surf_index] +
@@ -248,29 +245,26 @@ brw_create_constant_surface(struct brw_context *brw,
 {
    struct intel_context *intel = &brw->intel;
    const GLint w = width - 1;
-   struct brw_surface_state surf;
-   void *map;
+   struct brw_surface_state *surf;
 
-   memset(&surf, 0, sizeof(surf));
+   surf = brw_state_batch(brw, sizeof(*surf), 32, out_bo, out_offset);
+   memset(surf, 0, sizeof(*surf));
 
-   surf.ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
-   surf.ss0.surface_type = BRW_SURFACE_BUFFER;
-   surf.ss0.surface_format = BRW_SURFACEFORMAT_R32G32B32A32_FLOAT;
+   surf->ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
+   surf->ss0.surface_type = BRW_SURFACE_BUFFER;
+   surf->ss0.surface_format = BRW_SURFACEFORMAT_R32G32B32A32_FLOAT;
 
    if (intel->gen >= 6)
-      surf.ss0.render_cache_read_write = 1;
+      surf->ss0.render_cache_read_write = 1;
 
    assert(bo);
-   surf.ss1.base_addr = bo->offset; /* reloc */
+   surf->ss1.base_addr = bo->offset; /* reloc */
 
-   surf.ss2.width = w & 0x7f;            /* bits 6:0 of size or width */
-   surf.ss2.height = (w >> 7) & 0x1fff;  /* bits 19:7 of size or width */
-   surf.ss3.depth = (w >> 20) & 0x7f;    /* bits 26:20 of size or width */
-   surf.ss3.pitch = (width * 16) - 1; /* ignored?? */
-   brw_set_surface_tiling(&surf, I915_TILING_NONE); /* tiling now allowed */
-
-   map = brw_state_batch(brw, sizeof(surf), 32, out_bo, out_offset);
-   memcpy(map, &surf, sizeof(surf));
+   surf->ss2.width = w & 0x7f;            /* bits 6:0 of size or width */
+   surf->ss2.height = (w >> 7) & 0x1fff;  /* bits 19:7 of size or width */
+   surf->ss3.depth = (w >> 20) & 0x7f;    /* bits 26:20 of size or width */
+   surf->ss3.pitch = (width * 16) - 1; /* ignored?? */
+   brw_set_surface_tiling(surf, I915_TILING_NONE); /* tiling now allowed */
 
    /* Emit relocation to surface contents.  Section 5.1.1 of the gen4
     * bspec ("Data Cache") says that the data cache does not exist as
@@ -384,33 +378,24 @@ static void
 brw_update_null_renderbuffer_surface(struct brw_context *brw, unsigned int unit)
 {
    struct intel_context *intel = &brw->intel;
-   struct brw_surface_state surf;
-   void *map;
+   struct brw_surface_state *surf;
 
-   memset(&surf, 0, sizeof(surf));
-
-   surf.ss0.surface_type = BRW_SURFACE_NULL;
-   surf.ss0.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
-   surf.ss1.base_addr = 0;
+   surf = brw_state_batch(brw, sizeof(*surf), 32,
+			 &brw->wm.surf_bo[unit],
+			 &brw->wm.surf_offset[unit]);
+   memset(surf, 0, sizeof(*surf));
 
-   surf.ss2.width = 0;
-   surf.ss2.height = 0;
-   brw_set_surface_tiling(&surf, I915_TILING_NONE);
-   surf.ss3.pitch = 0;
+   surf->ss0.surface_type = BRW_SURFACE_NULL;
+   surf->ss0.surface_format = BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
 
    if (intel->gen < 6) {
       /* _NEW_COLOR */
-      surf.ss0.color_blend = 0;
-      surf.ss0.writedisable_red =   1;
-      surf.ss0.writedisable_green = 1;
-      surf.ss0.writedisable_blue =  1;
-      surf.ss0.writedisable_alpha = 1;
+      surf->ss0.color_blend = 0;
+      surf->ss0.writedisable_red =   1;
+      surf->ss0.writedisable_green = 1;
+      surf->ss0.writedisable_blue =  1;
+      surf->ss0.writedisable_alpha = 1;
    }
-
-   map = brw_state_batch(brw, sizeof(surf), 32,
-			 &brw->wm.surf_bo[unit],
-			 &brw->wm.surf_offset[unit]);
-   memcpy(map, &surf, sizeof(surf));
 }
 
 /**