i965: Move compute shader code around

This moves the compute shader code around in order to make the way the
code is split up more consistent. There should be no functional changes.
Typically we have a few files per stage:

    brw_vs.c, brw_wm.c brw_gs.c:

        code to drive code generation and implement precompiling and
        cache search.

    genX_<stage>_state.c

        gen specific implementation of the state emission for the shader
        stage.

The brw_*_emit() functions are all in the same files as the visitor
classes they use (with the exception of VS, which may use either vec4 or
fs).

To make compute follow this convention, we move the brw_cs_emit()
function into brw_fs.cpp. We can then rename brw_cs.cpp to brw_cs.c and
do this in C like the other similar files.  Finally, move state setup
and atoms to gen7_cs_state.c.

Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>
Signed-off-by: Kristian Høgsberg Kristensen <[email protected]>

1 files changed, 194 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_cs.c b/src/mesa/drivers/dri/i965/brw_cs.c
new file mode 100644
index 00000000000..012c46698e7
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_cs.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2014 - 2015 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.
+ */
+
+#include "util/ralloc.h"
+#include "brw_context.h"
+#include "brw_cs.h"
+#include "brw_eu.h"
+#include "brw_wm.h"
+#include "brw_shader.h"
+#include "intel_mipmap_tree.h"
+#include "brw_state.h"
+#include "intel_batchbuffer.h"
+
+bool
+brw_cs_prog_data_compare(const void *in_a, const void *in_b)
+{
+   const struct brw_cs_prog_data *a =
+      (const struct brw_cs_prog_data *)in_a;
+   const struct brw_cs_prog_data *b =
+      (const struct brw_cs_prog_data *)in_b;
+
+   /* Compare the base structure. */
+   if (!brw_stage_prog_data_compare(&a->base, &b->base))
+      return false;
+
+   /* Compare the rest of the structure. */
+   const unsigned offset = sizeof(struct brw_stage_prog_data);
+   if (memcmp(((char *) a) + offset, ((char *) b) + offset,
+              sizeof(struct brw_cs_prog_data) - offset))
+      return false;
+
+   return true;
+}
+
+static bool
+brw_codegen_cs_prog(struct brw_context *brw,
+                    struct gl_shader_program *prog,
+                    struct brw_compute_program *cp,
+                    struct brw_cs_prog_key *key)
+{
+   struct gl_context *ctx = &brw->ctx;
+   const GLuint *program;
+   void *mem_ctx = ralloc_context(NULL);
+   GLuint program_size;
+   struct brw_cs_prog_data prog_data;
+
+   struct gl_shader *cs = prog->_LinkedShaders[MESA_SHADER_COMPUTE];
+   assert (cs);
+
+   memset(&prog_data, 0, sizeof(prog_data));
+
+   /* 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.
+    */
+   int param_count = cs->num_uniform_components +
+                     cs->NumImages * BRW_IMAGE_PARAM_SIZE;
+
+   /* The backend also sometimes adds params for texture size. */
+   param_count += 2 * ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
+   prog_data.base.param =
+      rzalloc_array(NULL, const gl_constant_value *, param_count);
+   prog_data.base.pull_param =
+      rzalloc_array(NULL, const gl_constant_value *, param_count);
+   prog_data.base.image_param =
+      rzalloc_array(NULL, struct brw_image_param, cs->NumImages);
+   prog_data.base.nr_params = param_count;
+   prog_data.base.nr_image_params = cs->NumImages;
+
+   program = brw_cs_emit(brw, mem_ctx, key, &prog_data,
+                         &cp->program, prog, &program_size);
+   if (program == NULL) {
+      ralloc_free(mem_ctx);
+      return false;
+   }
+
+   if (prog_data.base.total_scratch) {
+      brw_get_scratch_bo(brw, &brw->cs.base.scratch_bo,
+                         prog_data.base.total_scratch * brw->max_cs_threads);
+   }
+
+   if (unlikely(INTEL_DEBUG & DEBUG_CS))
+      fprintf(stderr, "\n");
+
+   brw_upload_cache(&brw->cache, BRW_CACHE_CS_PROG,
+                    key, sizeof(*key),
+                    program, program_size,
+                    &prog_data, sizeof(prog_data),
+                    &brw->cs.base.prog_offset, &brw->cs.prog_data);
+   ralloc_free(mem_ctx);
+
+   return true;
+}
+
+
+static void
+brw_cs_populate_key(struct brw_context *brw, struct brw_cs_prog_key *key)
+{
+   struct gl_context *ctx = &brw->ctx;
+   /* BRW_NEW_COMPUTE_PROGRAM */
+   const struct brw_compute_program *cp =
+      (struct brw_compute_program *) brw->compute_program;
+   const struct gl_program *prog = (struct gl_program *) cp;
+
+   memset(key, 0, sizeof(*key));
+
+   /* _NEW_TEXTURE */
+   brw_populate_sampler_prog_key_data(ctx, prog, brw->cs.base.sampler_count,
+                                      &key->tex);
+
+   /* The unique compute program ID */
+   key->program_string_id = cp->id;
+}
+
+
+void
+brw_upload_cs_prog(struct brw_context *brw)
+{
+   struct gl_context *ctx = &brw->ctx;
+   struct brw_cs_prog_key key;
+   struct brw_compute_program *cp = (struct brw_compute_program *)
+      brw->compute_program;
+
+   if (!cp)
+      return;
+
+   if (!brw_state_dirty(brw, _NEW_TEXTURE, BRW_NEW_COMPUTE_PROGRAM))
+      return;
+
+   brw->cs.base.sampler_count =
+      _mesa_fls(ctx->ComputeProgram._Current->Base.SamplersUsed);
+
+   brw_cs_populate_key(brw, &key);
+
+   if (!brw_search_cache(&brw->cache, BRW_CACHE_CS_PROG,
+                         &key, sizeof(key),
+                         &brw->cs.base.prog_offset, &brw->cs.prog_data)) {
+      bool success =
+         brw_codegen_cs_prog(brw,
+                             ctx->Shader.CurrentProgram[MESA_SHADER_COMPUTE],
+                             cp, &key);
+      (void) success;
+      assert(success);
+   }
+   brw->cs.base.prog_data = &brw->cs.prog_data->base;
+}
+
+
+bool
+brw_cs_precompile(struct gl_context *ctx,
+                  struct gl_shader_program *shader_prog,
+                  struct gl_program *prog)
+{
+   struct brw_context *brw = brw_context(ctx);
+   struct brw_cs_prog_key key;
+
+   struct gl_compute_program *cp = (struct gl_compute_program *) prog;
+   struct brw_compute_program *bcp = brw_compute_program(cp);
+
+   memset(&key, 0, sizeof(key));
+   key.program_string_id = bcp->id;
+
+   brw_setup_tex_for_precompile(brw, &key.tex, prog);
+
+   uint32_t old_prog_offset = brw->cs.base.prog_offset;
+   struct brw_cs_prog_data *old_prog_data = brw->cs.prog_data;
+
+   bool success = brw_codegen_cs_prog(brw, shader_prog, bcp, &key);
+
+   brw->cs.base.prog_offset = old_prog_offset;
+   brw->cs.prog_data = old_prog_data;
+
+   return success;
+}