iris: Optimize out redundant sampler state binds
[mesa.git] / src / gallium / drivers / iris / iris_state.c
index 5154fbb522e54c24b74606872e561e410cc65078..a503f38d6ca511a9c19e05c34bb0a3c0ac472a8a 100644 (file)
@@ -391,7 +391,7 @@ emit_state(struct iris_batch *batch,
    (!old_cso || memcmp(old_cso->x, new_cso->x, sizeof(old_cso->x)) != 0)
 
 static void
-flush_for_state_base_change(struct iris_batch *batch)
+flush_before_state_base_change(struct iris_batch *batch)
 {
    /* Flush before emitting STATE_BASE_ADDRESS.
     *
@@ -415,12 +415,59 @@ flush_for_state_base_change(struct iris_batch *batch)
     * rendering.  It's a bit of a big hammer but it appears to work.
     */
    iris_emit_end_of_pipe_sync(batch,
-                              "change STATE_BASE_ADDRESS",
+                              "change STATE_BASE_ADDRESS (flushes)",
                               PIPE_CONTROL_RENDER_TARGET_FLUSH |
                               PIPE_CONTROL_DEPTH_CACHE_FLUSH |
                               PIPE_CONTROL_DATA_CACHE_FLUSH);
 }
 
+static void
+flush_after_state_base_change(struct iris_batch *batch)
+{
+   /* After re-setting the surface state base address, we have to do some
+    * cache flusing so that the sampler engine will pick up the new
+    * SURFACE_STATE objects and binding tables. From the Broadwell PRM,
+    * Shared Function > 3D Sampler > State > State Caching (page 96):
+    *
+    *    Coherency with system memory in the state cache, like the texture
+    *    cache is handled partially by software. It is expected that the
+    *    command stream or shader will issue Cache Flush operation or
+    *    Cache_Flush sampler message to ensure that the L1 cache remains
+    *    coherent with system memory.
+    *
+    *    [...]
+    *
+    *    Whenever the value of the Dynamic_State_Base_Addr,
+    *    Surface_State_Base_Addr are altered, the L1 state cache must be
+    *    invalidated to ensure the new surface or sampler state is fetched
+    *    from system memory.
+    *
+    * The PIPE_CONTROL command has a "State Cache Invalidation Enable" bit
+    * which, according the PIPE_CONTROL instruction documentation in the
+    * Broadwell PRM:
+    *
+    *    Setting this bit is independent of any other bit in this packet.
+    *    This bit controls the invalidation of the L1 and L2 state caches
+    *    at the top of the pipe i.e. at the parsing time.
+    *
+    * Unfortunately, experimentation seems to indicate that state cache
+    * invalidation through a PIPE_CONTROL does nothing whatsoever in
+    * regards to surface state and binding tables.  In stead, it seems that
+    * invalidating the texture cache is what is actually needed.
+    *
+    * XXX:  As far as we have been able to determine through
+    * experimentation, shows that flush the texture cache appears to be
+    * sufficient.  The theory here is that all of the sampling/rendering
+    * units cache the binding table in the texture cache.  However, we have
+    * yet to be able to actually confirm this.
+    */
+   iris_emit_end_of_pipe_sync(batch,
+                              "change STATE_BASE_ADDRESS (invalidates)",
+                              PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE |
+                              PIPE_CONTROL_CONST_CACHE_INVALIDATE |
+                              PIPE_CONTROL_STATE_CACHE_INVALIDATE);
+}
+
 static void
 _iris_emit_lri(struct iris_batch *batch, uint32_t reg, uint32_t val)
 {
@@ -513,7 +560,7 @@ init_glk_barrier_mode(struct iris_batch *batch, uint32_t value)
 static void
 init_state_base_address(struct iris_batch *batch)
 {
-   flush_for_state_base_change(batch);
+   flush_before_state_base_change(batch);
 
    /* We program most base addresses once at context initialization time.
     * Each base address points at a 4GB memory zone, and never needs to
@@ -528,6 +575,7 @@ init_state_base_address(struct iris_batch *batch)
       sba.DynamicStateMOCS            = MOCS_WB;
       sba.IndirectObjectMOCS          = MOCS_WB;
       sba.InstructionMOCS             = MOCS_WB;
+      sba.SurfaceStateMOCS            = MOCS_WB;
 
       sba.GeneralStateBaseAddressModifyEnable   = true;
       sba.DynamicStateBaseAddressModifyEnable   = true;
@@ -550,6 +598,8 @@ init_state_base_address(struct iris_batch *batch)
       sba.InstructionBufferSize    = 0xfffff;
       sba.DynamicStateBufferSize   = 0xfffff;
    }
+
+   flush_after_state_base_change(batch);
 }
 
 static void
@@ -557,8 +607,19 @@ iris_emit_l3_config(struct iris_batch *batch, const struct gen_l3_config *cfg,
                     bool has_slm, bool wants_dc_cache)
 {
    uint32_t reg_val;
-   iris_pack_state(GENX(L3CNTLREG), &reg_val, reg) {
+
+#if GEN_GEN >= 12
+#define L3_ALLOCATION_REG GENX(L3ALLOC)
+#define L3_ALLOCATION_REG_num GENX(L3ALLOC_num)
+#else
+#define L3_ALLOCATION_REG GENX(L3CNTLREG)
+#define L3_ALLOCATION_REG_num GENX(L3CNTLREG_num)
+#endif
+
+   iris_pack_state(L3_ALLOCATION_REG, &reg_val, reg) {
+#if GEN_GEN < 12
       reg.SLMEnable = has_slm;
+#endif
 #if GEN_GEN == 11
       /* WA_1406697149: Bit 9 "Error Detection Behavior Control" must be set
        * in L3CNTLREG register. The default setting of the bit is not the
@@ -572,7 +633,7 @@ iris_emit_l3_config(struct iris_batch *batch, const struct gen_l3_config *cfg,
       reg.DCAllocation = cfg->n[GEN_L3P_DC];
       reg.AllAllocation = cfg->n[GEN_L3P_ALL];
    }
-   iris_emit_lri(batch, L3CNTLREG, reg_val);
+   _iris_emit_lri(batch, L3_ALLOCATION_REG_num, reg_val);
 }
 
 static void
@@ -749,12 +810,6 @@ iris_init_render_context(struct iris_screen *screen,
       }
       iris_emit_lri(batch, HALF_SLICE_CHICKEN7, reg_val);
 
-      iris_pack_state(GENX(SLICE_COMMON_ECO_CHICKEN1), &reg_val, reg) {
-         reg.StateCacheRedirectToCSSectionEnable = true;
-         reg.StateCacheRedirectToCSSectionEnableMask = true;
-      }
-      iris_emit_lri(batch, SLICE_COMMON_ECO_CHICKEN1, reg_val);
-
       /* Hardware specification recommends disabling repacking for the
        * compatibility with decompression mechanism in display controller.
        */
@@ -1364,9 +1419,11 @@ iris_create_rasterizer_state(struct pipe_context *ctx,
    const unsigned line_stipple_factor = state->line_stipple_factor + 1;
 
    iris_pack_command(GENX(3DSTATE_LINE_STIPPLE), cso->line_stipple, line) {
-      line.LineStipplePattern = state->line_stipple_pattern;
-      line.LineStippleInverseRepeatCount = 1.0f / line_stipple_factor;
-      line.LineStippleRepeatCount = line_stipple_factor;
+      if (state->line_stipple_enable) {
+         line.LineStipplePattern = state->line_stipple_pattern;
+         line.LineStippleInverseRepeatCount = 1.0f / line_stipple_factor;
+         line.LineStippleRepeatCount = line_stipple_factor;
+      }
    }
 
    return cso;
@@ -1549,11 +1606,17 @@ iris_bind_sampler_states(struct pipe_context *ctx,
 
    assert(start + count <= IRIS_MAX_TEXTURE_SAMPLERS);
 
+   bool dirty = false;
+
    for (int i = 0; i < count; i++) {
-      shs->samplers[start + i] = states[i];
+      if (shs->samplers[start + i] != states[i]) {
+         shs->samplers[start + i] = states[i];
+         dirty = true;
+      }
    }
 
-   ice->state.dirty |= IRIS_DIRTY_SAMPLER_STATES_VS << stage;
+   if (dirty)
+      ice->state.dirty |= IRIS_DIRTY_SAMPLER_STATES_VS << stage;
 }
 
 /**
@@ -1799,13 +1862,14 @@ static void
 fill_surface_state(struct isl_device *isl_dev,
                    void *map,
                    struct iris_resource *res,
+                   struct isl_surf *surf,
                    struct isl_view *view,
                    unsigned aux_usage,
                    uint32_t tile_x_sa,
                    uint32_t tile_y_sa)
 {
    struct isl_surf_fill_state_info f = {
-      .surf = &res->surf,
+      .surf = surf,
       .view = view,
       .mocs = mocs(res->bo),
       .address = res->bo->gtt_offset + res->offset,
@@ -1915,8 +1979,8 @@ iris_create_sampler_view(struct pipe_context *ctx,
          /* If we have a multisampled depth buffer, do not create a sampler
           * surface state with HiZ.
           */
-         fill_surface_state(&screen->isl_dev, map, isv->res, &isv->view,
-                            aux_usage, 0, 0);
+         fill_surface_state(&screen->isl_dev, map, isv->res, &isv->res->surf,
+                            &isv->view, aux_usage, 0, 0);
 
          map += SURFACE_STATE_ALIGNMENT;
       }
@@ -2006,9 +2070,6 @@ iris_create_surface(struct pipe_context *ctx,
    };
 
 #if GEN_GEN == 8
-   struct iris_resource res_copy;
-   memcpy(&res_copy, res, sizeof(*res));
-
    enum pipe_texture_target target = (tex->target == PIPE_TEXTURE_3D &&
                                       array_len == 1) ? PIPE_TEXTURE_2D :
                                      tex->target == PIPE_TEXTURE_1D_ARRAY ?
@@ -2037,13 +2098,15 @@ iris_create_surface(struct pipe_context *ctx,
    void *map = alloc_surface_states(ice->state.surface_uploader,
                                     &surf->surface_state,
                                     res->aux.possible_usages);
-   if (!unlikely(map))
+   if (!unlikely(map)) {
+      pipe_resource_reference(&surf->surface_state.res, NULL);
       return NULL;
+   }
 
 #if GEN_GEN == 8
    void *map_read = alloc_surface_states(ice->state.surface_uploader,
                                          &surf->surface_state_read,
-                                         res_copy.aux.possible_usages);
+                                         res->aux.possible_usages);
    if (!unlikely(map_read)) {
       pipe_resource_reference(&surf->surface_state_read.res, NULL);
       return NULL;
@@ -2059,20 +2122,25 @@ iris_create_surface(struct pipe_context *ctx,
        */
       unsigned aux_modes = res->aux.possible_usages;
       while (aux_modes) {
+#if GEN_GEN == 8
+         uint32_t offset = res->offset;
+#endif
          enum isl_aux_usage aux_usage = u_bit_scan(&aux_modes);
-         fill_surface_state(&screen->isl_dev, map, res, view, aux_usage,
-                            0, 0);
+         fill_surface_state(&screen->isl_dev, map, res, &res->surf,
+                            view, aux_usage, 0, 0);
          map += SURFACE_STATE_ALIGNMENT;
 
 #if GEN_GEN == 8
          struct isl_surf surf;
          uint32_t tile_x_sa = 0, tile_y_sa = 0;
-         get_rt_read_isl_surf(devinfo, &res_copy, target, read_view,
+         get_rt_read_isl_surf(devinfo, res, target, read_view,
                               &tile_x_sa, &tile_y_sa, &surf);
-         res_copy.surf = surf;
-         fill_surface_state(&screen->isl_dev, map_read, &res_copy, read_view,
+         fill_surface_state(&screen->isl_dev, map_read, res, &surf, read_view,
                             aux_usage, tile_x_sa, tile_y_sa);
-
+         /* Restore offset because we change offset in case of handling
+          * non_coherent fb fetch
+          */
+         res->offset = offset;
          map_read += SURFACE_STATE_ALIGNMENT;
 #endif
       }
@@ -2270,8 +2338,8 @@ iris_set_shader_images(struct pipe_context *ctx,
                while (aux_modes) {
                   enum isl_aux_usage usage = u_bit_scan(&aux_modes);
 
-                  fill_surface_state(&screen->isl_dev, map, res, &view,
-                                     usage, 0, 0);
+                  fill_surface_state(&screen->isl_dev, map, res, &res->surf,
+                                     &view, usage, 0, 0);
 
                   map += SURFACE_STATE_ALIGNMENT;
                }
@@ -3619,7 +3687,7 @@ iris_populate_fs_key(const struct iris_context *ice,
    key->persample_interp = rast->force_persample_interp;
    key->multisample_fbo = rast->multisample && fb->samples > 1;
 
-   key->coherent_fb_fetch = true;
+   key->coherent_fb_fetch = GEN_GEN >= 9;
 
    key->force_dual_color_blend =
       screen->driconf.dual_color_blend_by_location &&
@@ -3994,9 +4062,10 @@ surf_state_offset_for_aux(struct iris_resource *res,
                           enum isl_aux_usage aux_usage)
 {
    return SURFACE_STATE_ALIGNMENT *
-          util_bitcount(res->aux.possible_usages & ((1 << aux_usage) - 1));
+          util_bitcount(aux_modes & ((1 << aux_usage) - 1));
 }
 
+#if GEN_GEN == 9
 static void
 surf_state_update_clear_value(struct iris_batch *batch,
                               struct iris_resource *res,
@@ -4006,57 +4075,74 @@ surf_state_update_clear_value(struct iris_batch *batch,
 {
    struct isl_device *isl_dev = &batch->screen->isl_dev;
    struct iris_bo *state_bo = iris_resource_bo(state->res);
-   uint64_t real_offset = state->offset +
-      IRIS_MEMZONE_BINDER_START;
+   uint64_t real_offset = state->offset + IRIS_MEMZONE_BINDER_START;
    uint32_t offset_into_bo = real_offset - state_bo->gtt_offset;
    uint32_t clear_offset = offset_into_bo +
       isl_dev->ss.clear_value_offset +
       surf_state_offset_for_aux(res, aux_modes, aux_usage);
+   uint32_t *color = res->aux.clear_color.u32;
+
+   assert(isl_dev->ss.clear_value_size == 16);
 
-   batch->vtbl->copy_mem_mem(batch, state_bo, clear_offset,
-                             res->aux.clear_color_bo,
-                             res->aux.clear_color_offset,
-                             isl_dev->ss.clear_value_size);
+   if (aux_usage == ISL_AUX_USAGE_HIZ) {
+      iris_emit_pipe_control_write(batch, "update fast clear value (Z)",
+                                   PIPE_CONTROL_WRITE_IMMEDIATE,
+                                   state_bo, clear_offset, color[0]);
+   } else {
+      iris_emit_pipe_control_write(batch, "update fast clear color (RG__)",
+                                   PIPE_CONTROL_WRITE_IMMEDIATE,
+                                   state_bo, clear_offset,
+                                   (uint64_t) color[0] |
+                                   (uint64_t) color[1] << 32);
+      iris_emit_pipe_control_write(batch, "update fast clear color (__BA)",
+                                   PIPE_CONTROL_WRITE_IMMEDIATE,
+                                   state_bo, clear_offset + 8,
+                                   (uint64_t) color[2] |
+                                   (uint64_t) color[3] << 32);
+   }
+
+   iris_emit_pipe_control_flush(batch,
+                                "update fast clear: state cache invalidate",
+                                PIPE_CONTROL_FLUSH_ENABLE |
+                                PIPE_CONTROL_STATE_CACHE_INVALIDATE);
 }
+#endif
 
 static void
 update_clear_value(struct iris_context *ice,
                    struct iris_batch *batch,
                    struct iris_resource *res,
                    struct iris_state_ref *state,
-                   unsigned aux_modes,
+                   unsigned all_aux_modes,
                    struct isl_view *view)
 {
-   struct iris_screen *screen = batch->screen;
-   const struct gen_device_info *devinfo = &screen->devinfo;
+   UNUSED struct isl_device *isl_dev = &batch->screen->isl_dev;
+   UNUSED unsigned aux_modes = all_aux_modes;
 
    /* We only need to update the clear color in the surface state for gen8 and
     * gen9. Newer gens can read it directly from the clear color state buffer.
     */
-   if (devinfo->gen > 9)
-      return;
+#if GEN_GEN == 9
+   /* Skip updating the ISL_AUX_USAGE_NONE surface state */
+   aux_modes &= ~(1 << ISL_AUX_USAGE_NONE);
 
-   if (devinfo->gen == 9) {
-      /* Skip updating the ISL_AUX_USAGE_NONE surface state */
-      aux_modes &= ~(1 << ISL_AUX_USAGE_NONE);
+   while (aux_modes) {
+      enum isl_aux_usage aux_usage = u_bit_scan(&aux_modes);
 
-      while (aux_modes) {
-         enum isl_aux_usage aux_usage = u_bit_scan(&aux_modes);
+      surf_state_update_clear_value(batch, res, state, all_aux_modes,
+                                    aux_usage);
+   }
+#elif GEN_GEN == 8
+   pipe_resource_reference(&state->res, NULL);
 
-         surf_state_update_clear_value(batch, res, state, aux_modes,
-                                       aux_usage);
-      }
-   } else if (devinfo->gen == 8) {
-      pipe_resource_reference(&state->res, NULL);
-      void *map = alloc_surface_states(ice->state.surface_uploader,
-                                       state, res->aux.possible_usages);
-      while (aux_modes) {
-         enum isl_aux_usage aux_usage = u_bit_scan(&aux_modes);
-         fill_surface_state(&screen->isl_dev, map, res, view,
-                            aux_usage, 0, 0);
-         map += SURFACE_STATE_ALIGNMENT;
-      }
+   void *map = alloc_surface_states(ice->state.surface_uploader,
+                                    state, all_aux_modes);
+   while (aux_modes) {
+      enum isl_aux_usage aux_usage = u_bit_scan(&aux_modes);
+      fill_surface_state(isl_dev, map, res, &res->surf, view, aux_usage, 0, 0);
+      map += SURFACE_STATE_ALIGNMENT;
    }
+#endif
 }
 
 /**
@@ -4544,14 +4630,28 @@ iris_update_surface_base_address(struct iris_batch *batch,
    if (batch->last_surface_base_address == binder->bo->gtt_offset)
       return;
 
-   flush_for_state_base_change(batch);
+   flush_before_state_base_change(batch);
 
    iris_emit_cmd(batch, GENX(STATE_BASE_ADDRESS), sba) {
-      sba.SurfaceStateMOCS = MOCS_WB;
       sba.SurfaceStateBaseAddressModifyEnable = true;
       sba.SurfaceStateBaseAddress = ro_bo(binder->bo, 0);
+
+      /* The hardware appears to pay attention to the MOCS fields even
+       * if you don't set the "Address Modify Enable" bit for the base.
+       */
+      sba.GeneralStateMOCS            = MOCS_WB;
+      sba.StatelessDataPortAccessMOCS = MOCS_WB;
+      sba.DynamicStateMOCS            = MOCS_WB;
+      sba.IndirectObjectMOCS          = MOCS_WB;
+      sba.InstructionMOCS             = MOCS_WB;
+      sba.SurfaceStateMOCS            = MOCS_WB;
+#if GEN_GEN >= 9
+      sba.BindlessSurfaceStateMOCS    = MOCS_WB;
+#endif
    }
 
+   flush_after_state_base_change(batch);
+
    batch->last_surface_base_address = binder->bo->gtt_offset;
 }