i965/gen8: Factor out texture surface state set-up from gen8_update_texture_surface().

This moves most of the surface state set-up logic that can be shared
between textures and shader images to a separate function.

src/mesa/drivers/dri/i965/gen8_surface_state.c

@@ -150,34 +150,23 @@ gen8_emit_buffer_surface_state(struct brw_context *brw,
 }
 
 static void
-gen8_update_texture_surface(struct gl_context *ctx,
+gen8_emit_texture_surface_state(struct brw_context *brw,
-                            unsigned unit,
+                                struct intel_mipmap_tree *mt,
-                            uint32_t *surf_offset,
+                                GLenum target,
-                            bool for_gather)
+                                unsigned min_layer, unsigned max_layer,
+                                unsigned min_level, unsigned max_level,
+                                unsigned format,
+                                unsigned swizzle,
+                                uint32_t *surf_offset,
+                                bool rw, bool for_gather)
 {
-   struct brw_context *brw = brw_context(ctx);
+   const unsigned depth = max_layer - min_layer;
-   struct gl_texture_object *tObj = ctx->Texture.Unit[unit]._Current;
-   struct intel_texture_object *intelObj = intel_texture_object(tObj);
-   struct intel_mipmap_tree *mt = intelObj->mt;
-   struct gl_texture_image *firstImage = tObj->Image[0][tObj->BaseLevel];
-   struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
    struct intel_mipmap_tree *aux_mt = NULL;
    uint32_t aux_mode = 0;
-   mesa_format format = intelObj->_Format;
    uint32_t mocs_wb = brw->gen >= 9 ? SKL_MOCS_WB : BDW_MOCS_WB;
-
-   if (tObj->Target == GL_TEXTURE_BUFFER) {
-      brw_update_buffer_texture_surface(ctx, unit, surf_offset);
-      return;
-   }
-
-   if (tObj->StencilSampling && firstImage->_BaseFormat == GL_DEPTH_STENCIL) {
-      mt = mt->stencil_mt;
-      format = MESA_FORMAT_S_UINT8;
-   }
-
    unsigned tiling_mode, pitch;
-   if (format == MESA_FORMAT_S_UINT8) {
+
+   if (mt->format == MESA_FORMAT_S_UINT8) {
       tiling_mode = GEN8_SURFACE_TILING_W;
       pitch = 2 * mt->pitch;
    } else {
@@ -190,30 +179,20 @@ gen8_update_texture_surface(struct gl_context *ctx,
       aux_mode = GEN8_SURFACE_AUX_MODE_MCS;
    }
 
-   /* If this is a view with restricted NumLayers, then our effective depth
-    * is not just the miptree depth.
-    */
-   uint32_t effective_depth =
-      (tObj->Immutable && tObj->Target != GL_TEXTURE_3D) ? tObj->NumLayers
-                                                         : mt->logical_depth0;
-
-   uint32_t tex_format = translate_tex_format(brw, format, sampler->sRGBDecode);
-
    uint32_t *surf = allocate_surface_state(brw, surf_offset);
 
-   surf[0] = translate_tex_target(tObj->Target) << BRW_SURFACE_TYPE_SHIFT |
+   surf[0] = translate_tex_target(target) << BRW_SURFACE_TYPE_SHIFT |
-             tex_format << BRW_SURFACE_FORMAT_SHIFT |
+             format << BRW_SURFACE_FORMAT_SHIFT |
              vertical_alignment(mt) |
              horizontal_alignment(mt) |
              tiling_mode;
 
-   if (tObj->Target == GL_TEXTURE_CUBE_MAP ||
+   if (target == GL_TEXTURE_CUBE_MAP ||
-       tObj->Target == GL_TEXTURE_CUBE_MAP_ARRAY) {
+       target == GL_TEXTURE_CUBE_MAP_ARRAY) {
       surf[0] |= BRW_SURFACE_CUBEFACE_ENABLES;
    }
 
-   if (_mesa_is_array_texture(tObj->Target) ||
+   if (_mesa_is_array_texture(target) || target == GL_TEXTURE_CUBE_MAP)
-       tObj->Target == GL_TEXTURE_CUBE_MAP)
       surf[0] |= GEN8_SURFACE_IS_ARRAY;
 
    surf[1] = SET_FIELD(mocs_wb, GEN8_SURFACE_MOCS) | mt->qpitch >> 2;
@@ -221,16 +200,14 @@ gen8_update_texture_surface(struct gl_context *ctx,
    surf[2] = SET_FIELD(mt->logical_width0 - 1, GEN7_SURFACE_WIDTH) |
              SET_FIELD(mt->logical_height0 - 1, GEN7_SURFACE_HEIGHT);
 
-   surf[3] = SET_FIELD(effective_depth - 1, BRW_SURFACE_DEPTH) | (pitch - 1);
+   surf[3] = SET_FIELD(depth - 1, BRW_SURFACE_DEPTH) | (pitch - 1);
 
    surf[4] = gen7_surface_msaa_bits(mt->num_samples, mt->msaa_layout) |
-             SET_FIELD(tObj->MinLayer, GEN7_SURFACE_MIN_ARRAY_ELEMENT) |
+             SET_FIELD(min_layer, GEN7_SURFACE_MIN_ARRAY_ELEMENT) |
-             SET_FIELD(effective_depth - 1,
+             SET_FIELD(depth - 1, GEN7_SURFACE_RENDER_TARGET_VIEW_EXTENT);
-                       GEN7_SURFACE_RENDER_TARGET_VIEW_EXTENT);
 
-   surf[5] = SET_FIELD(tObj->MinLevel + tObj->BaseLevel - mt->first_level,
+   surf[5] = SET_FIELD(min_level - mt->first_level, GEN7_SURFACE_MIN_LOD) |
-                       GEN7_SURFACE_MIN_LOD) |
+             (max_level - min_level - 1); /* mip count */
-             (intelObj->_MaxLevel - tObj->BaseLevel); /* mip count */
 
    if (aux_mt) {
       surf[6] = SET_FIELD(mt->qpitch / 4, GEN8_SURFACE_AUX_QPITCH) |
@@ -240,19 +217,7 @@ gen8_update_texture_surface(struct gl_context *ctx,
       surf[6] = 0;
    }
 
-   /* Handling GL_ALPHA as a surface format override breaks 1.30+ style
+   surf[7] = mt->fast_clear_color_value |
-    * texturing functions that return a float, as our code generation always
-    * selects the .x channel (which would always be 0).
-    */
-   const bool alpha_depth = tObj->DepthMode == GL_ALPHA &&
-      (firstImage->_BaseFormat == GL_DEPTH_COMPONENT ||
-       firstImage->_BaseFormat == GL_DEPTH_STENCIL);
-
-   surf[7] = mt->fast_clear_color_value;
-
-   const int swizzle =
-      unlikely(alpha_depth) ? SWIZZLE_XYZW : brw_get_texture_swizzle(ctx, tObj);
-   surf[7] |=
       SET_FIELD(swizzle_to_scs(GET_SWZ(swizzle, 0)), GEN7_SURFACE_SCS_R) |
       SET_FIELD(swizzle_to_scs(GET_SWZ(swizzle, 1)), GEN7_SURFACE_SCS_G) |
       SET_FIELD(swizzle_to_scs(GET_SWZ(swizzle, 2)), GEN7_SURFACE_SCS_B) |
@@ -264,7 +229,8 @@ gen8_update_texture_surface(struct gl_context *ctx,
       *((uint64_t *) &surf[10]) = aux_mt->bo->offset64;
       drm_intel_bo_emit_reloc(brw->batch.bo, *surf_offset + 10 * 4,
                               aux_mt->bo, 0,
-                              I915_GEM_DOMAIN_SAMPLER, 0);
+                              I915_GEM_DOMAIN_SAMPLER,
+                              (rw ? I915_GEM_DOMAIN_SAMPLER : 0));
    } else {
       surf[10] = 0;
       surf[11] = 0;
@@ -276,7 +242,57 @@ gen8_update_texture_surface(struct gl_context *ctx,
                            *surf_offset + 8 * 4,
                            mt->bo,
                            mt->offset,
-                           I915_GEM_DOMAIN_SAMPLER, 0);
+                           I915_GEM_DOMAIN_SAMPLER,
+                           (rw ? I915_GEM_DOMAIN_SAMPLER : 0));
+}
+
+static void
+gen8_update_texture_surface(struct gl_context *ctx,
+                            unsigned unit,
+                            uint32_t *surf_offset,
+                            bool for_gather)
+{
+   struct brw_context *brw = brw_context(ctx);
+   struct gl_texture_object *obj = ctx->Texture.Unit[unit]._Current;
+
+   if (obj->Target == GL_TEXTURE_BUFFER) {
+      brw_update_buffer_texture_surface(ctx, unit, surf_offset);
+
+   } else {
+      struct gl_texture_image *firstImage = obj->Image[0][obj->BaseLevel];
+      struct intel_texture_object *intel_obj = intel_texture_object(obj);
+      struct intel_mipmap_tree *mt = intel_obj->mt;
+      struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
+      /* If this is a view with restricted NumLayers, then our effective depth
+       * is not just the miptree depth.
+       */
+      const unsigned depth = (obj->Immutable && obj->Target != GL_TEXTURE_3D ?
+                              obj->NumLayers : mt->logical_depth0);
+
+      /* Handling GL_ALPHA as a surface format override breaks 1.30+ style
+       * texturing functions that return a float, as our code generation always
+       * selects the .x channel (which would always be 0).
+       */
+      const bool alpha_depth = obj->DepthMode == GL_ALPHA &&
+         (firstImage->_BaseFormat == GL_DEPTH_COMPONENT ||
+          firstImage->_BaseFormat == GL_DEPTH_STENCIL);
+      const unsigned swizzle = (unlikely(alpha_depth) ? SWIZZLE_XYZW :
+                                brw_get_texture_swizzle(&brw->ctx, obj));
+
+      unsigned format = translate_tex_format(brw, intel_obj->_Format,
+                                             sampler->sRGBDecode);
+      if (obj->StencilSampling && firstImage->_BaseFormat == GL_DEPTH_STENCIL) {
+         mt = mt->stencil_mt;
+         format = BRW_SURFACEFORMAT_R8_UINT;
+      }
+
+      gen8_emit_texture_surface_state(brw, mt, obj->Target,
+                                      obj->MinLayer, obj->MinLayer + depth,
+                                      obj->MinLevel + obj->BaseLevel,
+                                      obj->MinLevel + intel_obj->_MaxLevel + 1,
+                                      format, swizzle, surf_offset,
+                                      false, for_gather);
+   }
 }
 
 /**
@@ -446,5 +462,6 @@ gen8_init_vtable_surface_functions(struct brw_context *brw)
    brw->vtbl.update_texture_surface = gen8_update_texture_surface;
    brw->vtbl.update_renderbuffer_surface = gen8_update_renderbuffer_surface;
    brw->vtbl.emit_null_surface_state = gen8_emit_null_surface_state;
+   brw->vtbl.emit_texture_surface_state = gen8_emit_texture_surface_state;
    brw->vtbl.emit_buffer_surface_state = gen8_emit_buffer_surface_state;
 }