1 files changed, 319 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_tes.c b/src/mesa/drivers/dri/i965/brw_tes.c
new file mode 100644
index 00000000000..27dc7e59f5d
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_tes.c
@@ -0,0 +1,319 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file brw_tes.c
+ *
+ * Tessellation evaluation shader state upload code.
+ */
+
+#include "brw_context.h"
+#include "brw_nir.h"
+#include "brw_program.h"
+#include "brw_shader.h"
+#include "brw_state.h"
+#include "program/prog_parameter.h"
+
+static void
+brw_tes_debug_recompile(struct brw_context *brw,
+                       struct gl_shader_program *shader_prog,
+                       const struct brw_tes_prog_key *key)
+{
+   struct brw_cache_item *c = NULL;
+   const struct brw_tes_prog_key *old_key = NULL;
+   bool found = false;
+
+   perf_debug("Recompiling tessellation evaluation shader for program %d\n",
+              shader_prog->Name);
+
+   for (unsigned int i = 0; i < brw->cache.size; i++) {
+      for (c = brw->cache.items[i]; c; c = c->next) {
+         if (c->cache_id == BRW_CACHE_TES_PROG) {
+            old_key = c->key;
+
+            if (old_key->program_string_id == key->program_string_id)
+               break;
+         }
+      }
+      if (c)
+         break;
+   }
+
+   if (!c) {
+      perf_debug("  Didn't find previous compile in the shader cache for "
+                 "debug\n");
+      return;
+   }
+
+   found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
+   found |= key_debug(brw, "inputs read", old_key->inputs_read,
+                      key->inputs_read);
+   found |= key_debug(brw, "patch inputs read", old_key->patch_inputs_read,
+                      key->patch_inputs_read);
+
+   if (!found) {
+      perf_debug("  Something else\n");
+   }
+}
+
+static bool
+brw_codegen_tes_prog(struct brw_context *brw,
+                     struct gl_shader_program *shader_prog,
+                     struct brw_tess_eval_program *tep,
+                     struct brw_tes_prog_key *key)
+{
+   const struct brw_compiler *compiler = brw->intelScreen->compiler;
+   const struct brw_device_info *devinfo = brw->intelScreen->devinfo;
+   struct brw_stage_state *stage_state = &brw->tes.base;
+   nir_shader *nir = tep->program.Base.nir;
+   struct brw_tes_prog_data prog_data;
+   bool start_busy = false;
+   double start_time = 0;
+
+   memset(&prog_data, 0, sizeof(prog_data));
+
+   brw_assign_common_binding_table_offsets(MESA_SHADER_TESS_EVAL, devinfo,
+                                           shader_prog, &tep->program.Base,
+                                           &prog_data.base.base, 0);
+
+   switch (tep->program.Spacing) {
+   case GL_EQUAL:
+      prog_data.partitioning = BRW_TESS_PARTITIONING_INTEGER;
+      break;
+   case GL_FRACTIONAL_ODD:
+      prog_data.partitioning = BRW_TESS_PARTITIONING_ODD_FRACTIONAL;
+      break;
+   case GL_FRACTIONAL_EVEN:
+      prog_data.partitioning = BRW_TESS_PARTITIONING_EVEN_FRACTIONAL;
+      break;
+   default:
+      unreachable("invalid domain shader spacing");
+   }
+
+   switch (tep->program.PrimitiveMode) {
+   case GL_QUADS:
+      prog_data.domain = BRW_TESS_DOMAIN_QUAD;
+      break;
+   case GL_TRIANGLES:
+      prog_data.domain = BRW_TESS_DOMAIN_TRI;
+      break;
+   case GL_ISOLINES:
+      prog_data.domain = BRW_TESS_DOMAIN_ISOLINE;
+      break;
+   default:
+      unreachable("invalid domain shader primitive mode");
+   }
+
+   if (tep->program.PointMode) {
+      prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_POINT;
+   } else if (tep->program.PrimitiveMode == GL_ISOLINES) {
+      prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_LINE;
+   } else {
+      /* Hardware winding order is backwards from OpenGL */
+      switch (tep->program.VertexOrder) {
+      case GL_CCW:
+         prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_TRI_CW;
+         break;
+      case GL_CW:
+         prog_data.output_topology = BRW_TESS_OUTPUT_TOPOLOGY_TRI_CCW;
+         break;
+      default:
+         unreachable("invalid domain shader vertex order");
+      }
+   }
+
+   /* Allocate the references to the uniforms that will end up in the
+    * prog_data associated with the compiled program, and which will be freed
+    * by the state cache.
+    *
+    * Note: param_count needs to be num_uniform_components * 4, since we add
+    * padding around uniform values below vec4 size, so the worst case is that
+    * every uniform is a float which gets padded to the size of a vec4.
+    */
+   struct gl_shader *tes = shader_prog->_LinkedShaders[MESA_SHADER_TESS_EVAL];
+   int param_count = nir->num_uniforms;
+   if (!compiler->scalar_stage[MESA_SHADER_TESS_EVAL])
+      param_count *= 4;
+
+   prog_data.base.base.param =
+      rzalloc_array(NULL, const gl_constant_value *, param_count);
+   prog_data.base.base.pull_param =
+      rzalloc_array(NULL, const gl_constant_value *, param_count);
+   prog_data.base.base.image_param =
+      rzalloc_array(NULL, struct brw_image_param, tes->NumImages);
+   prog_data.base.base.nr_params = param_count;
+   prog_data.base.base.nr_image_params = tes->NumImages;
+
+   brw_nir_setup_glsl_uniforms(nir, shader_prog, &tep->program.Base,
+                               &prog_data.base.base,
+                               compiler->scalar_stage[MESA_SHADER_TESS_EVAL]);
+
+   if (unlikely(INTEL_DEBUG & DEBUG_TES))
+      brw_dump_ir("tessellation evaluation", shader_prog, tes, NULL);
+
+   int st_index = -1;
+   if (unlikely(INTEL_DEBUG & DEBUG_SHADER_TIME))
+      st_index = brw_get_shader_time_index(brw, shader_prog, NULL, ST_TES);
+
+   if (unlikely(brw->perf_debug)) {
+      start_busy = brw->batch.last_bo && drm_intel_bo_busy(brw->batch.last_bo);
+      start_time = get_time();
+   }
+
+   void *mem_ctx = ralloc_context(NULL);
+   unsigned program_size;
+   char *error_str;
+   const unsigned *program =
+      brw_compile_tes(compiler, brw, mem_ctx, key, &prog_data, nir,
+                      shader_prog, st_index, &program_size, &error_str);
+   if (program == NULL) {
+      if (shader_prog) {
+         shader_prog->LinkStatus = false;
+         ralloc_strcat(&shader_prog->InfoLog, error_str);
+      }
+
+      _mesa_problem(NULL, "Failed to compile tessellation evaluation shader: "
+                    "%s\n", error_str);
+
+      ralloc_free(mem_ctx);
+      return false;
+   }
+
+   if (unlikely(brw->perf_debug)) {
+      struct brw_shader *btes = (struct brw_shader *) tes;
+      if (btes->compiled_once) {
+         brw_tes_debug_recompile(brw, shader_prog, key);
+      }
+      if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
+         perf_debug("TES compile took %.03f ms and stalled the GPU\n",
+                    (get_time() - start_time) * 1000);
+      }
+      btes->compiled_once = true;
+   }
+
+   /* Scratch space is used for register spilling */
+   if (prog_data.base.base.total_scratch) {
+      brw_get_scratch_bo(brw, &stage_state->scratch_bo,
+			 prog_data.base.base.total_scratch *
+                         brw->max_ds_threads);
+   }
+
+   brw_upload_cache(&brw->cache, BRW_CACHE_TES_PROG,
+                    key, sizeof(*key),
+                    program, program_size,
+                    &prog_data, sizeof(prog_data),
+                    &stage_state->prog_offset, &brw->tes.prog_data);
+   ralloc_free(mem_ctx);
+
+   return true;
+}
+
+
+void
+brw_upload_tes_prog(struct brw_context *brw,
+                    uint64_t per_vertex_slots,
+                    uint32_t per_patch_slots)
+{
+   struct gl_context *ctx = &brw->ctx;
+   struct gl_shader_program **current = ctx->_Shader->CurrentProgram;
+   struct brw_stage_state *stage_state = &brw->tes.base;
+   struct brw_tes_prog_key key;
+   /* BRW_NEW_TESS_PROGRAMS */
+   struct brw_tess_eval_program *tep =
+      (struct brw_tess_eval_program *) brw->tess_eval_program;
+
+   if (!brw_state_dirty(brw,
+                        _NEW_TEXTURE,
+                        BRW_NEW_TESS_PROGRAMS))
+      return;
+
+   struct gl_program *prog = &tep->program.Base;
+
+   memset(&key, 0, sizeof(key));
+
+   key.program_string_id = tep->id;
+
+   /* Ignore gl_TessLevelInner/Outer - we treat them as system values,
+    * not inputs, and they're always present in the URB entry regardless
+    * of whether or not we read them.
+    */
+   key.inputs_read = per_vertex_slots &
+      ~(VARYING_BIT_TESS_LEVEL_INNER | VARYING_BIT_TESS_LEVEL_OUTER);
+   key.patch_inputs_read = per_patch_slots;
+
+   /* _NEW_TEXTURE */
+   brw_populate_sampler_prog_key_data(ctx, prog, stage_state->sampler_count,
+                                      &key.tex);
+
+   if (!brw_search_cache(&brw->cache, BRW_CACHE_TES_PROG,
+                         &key, sizeof(key),
+                         &stage_state->prog_offset, &brw->tes.prog_data)) {
+      bool success = brw_codegen_tes_prog(brw, current[MESA_SHADER_TESS_EVAL],
+                                          tep, &key);
+      assert(success);
+      (void)success;
+   }
+   brw->tes.base.prog_data = &brw->tes.prog_data->base.base;
+}
+
+
+bool
+brw_tes_precompile(struct gl_context *ctx,
+                   struct gl_shader_program *shader_prog,
+                   struct gl_program *prog)
+{
+   struct brw_context *brw = brw_context(ctx);
+   struct brw_tes_prog_key key;
+   uint32_t old_prog_offset = brw->tes.base.prog_offset;
+   struct brw_tes_prog_data *old_prog_data = brw->tes.prog_data;
+   bool success;
+
+   struct gl_tess_eval_program *tep = (struct gl_tess_eval_program *)prog;
+   struct brw_tess_eval_program *btep = brw_tess_eval_program(tep);
+
+   memset(&key, 0, sizeof(key));
+
+   key.program_string_id = btep->id;
+   key.inputs_read = prog->InputsRead;
+   key.patch_inputs_read = prog->PatchInputsRead;
+
+   if (shader_prog->_LinkedShaders[MESA_SHADER_TESS_CTRL]) {
+      struct gl_program *tcp =
+         shader_prog->_LinkedShaders[MESA_SHADER_TESS_CTRL]->Program;
+      key.inputs_read |= tcp->OutputsWritten;
+      key.patch_inputs_read |= tcp->PatchOutputsWritten;
+   }
+
+   /* Ignore gl_TessLevelInner/Outer - they're system values. */
+   key.inputs_read &= ~(VARYING_BIT_TESS_LEVEL_INNER |
+                        VARYING_BIT_TESS_LEVEL_OUTER);
+
+   brw_setup_tex_for_precompile(brw, &key.tex, prog);
+
+   success = brw_codegen_tes_prog(brw, shader_prog, btep, &key);
+
+   brw->tes.base.prog_offset = old_prog_offset;
+   brw->tes.prog_data = old_prog_data;
+
+   return success;
+}