st/glsl_to_tgsi: add (de)serialise program helpers

These will be shared between the on-disk shader cache and
ARB_get_program_binary.

Tested-by: Dieter Nützel <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>

2 files changed, 146 insertions, 127 deletions

diff --git a/src/mesa/state_tracker/st_shader_cache.c b/src/mesa/state_tracker/st_shader_cache.c
index 1d9b1727552..62d62f76117 100644
--- a/src/mesa/state_tracker/st_shader_cache.c
+++ b/src/mesa/state_tracker/st_shader_cache.c
@@ -50,22 +50,9 @@ write_tgsi_to_cache(struct blob *blob, const struct tgsi_token *tokens,
    prog->driver_cache_blob_size = blob->size;
 }
 
-/**
- * Store tgsi and any other required state in on-disk shader cache.
- */
 void
-st_store_tgsi_in_disk_cache(struct st_context *st, struct gl_program *prog)
+st_serialise_tgsi_program(struct gl_context *ctx, struct gl_program *prog)
 {
-   if (!st->ctx->Cache)
-      return;
-
-   /* Exit early when we are dealing with a ff shader with no source file to
-    * generate a source from.
-    */
-   static const char zero[sizeof(prog->sh.data->sha1)] = {0};
-   if (memcmp(prog->sh.data->sha1, zero, sizeof(prog->sh.data->sha1)) == 0)
-      return;
-
    struct blob blob;
    blob_init(&blob);
 
@@ -112,12 +99,31 @@ st_store_tgsi_in_disk_cache(struct st_context *st, struct gl_program *prog)
       unreachable("Unsupported stage");
    }
 
+   blob_finish(&blob);
+}
+
+/**
+ * Store tgsi and any other required state in on-disk shader cache.
+ */
+void
+st_store_tgsi_in_disk_cache(struct st_context *st, struct gl_program *prog)
+{
+   if (!st->ctx->Cache)
+      return;
+
+   /* Exit early when we are dealing with a ff shader with no source file to
+    * generate a source from.
+    */
+   static const char zero[sizeof(prog->sh.data->sha1)] = {0};
+   if (memcmp(prog->sh.data->sha1, zero, sizeof(prog->sh.data->sha1)) == 0)
+      return;
+
+   st_serialise_tgsi_program(st->ctx, prog);
+
    if (st->ctx->_Shader->Flags & GLSL_CACHE_INFO) {
       fprintf(stderr, "putting %s tgsi_tokens in cache\n",
               _mesa_shader_stage_to_string(prog->info.stage));
    }
-
-   blob_finish(&blob);
 }
 
 static void
@@ -138,159 +144,164 @@ read_tgsi_from_cache(struct blob_reader *blob_reader,
    blob_copy_bytes(blob_reader, (uint8_t *) *tokens, tokens_size);
 }
 
-bool
-st_load_tgsi_from_disk_cache(struct gl_context *ctx,
-                             struct gl_shader_program *prog)
+void
+st_deserialise_tgsi_program(struct gl_context *ctx,
+                            struct gl_shader_program *shProg,
+                            struct gl_program *prog)
 {
-   if (!ctx->Cache)
-      return false;
-
-   /* If we didn't load the GLSL metadata from cache then we could not have
-    * loaded the tgsi either.
-    */
-   if (prog->data->LinkStatus != linking_skipped)
-      return false;
-
    struct st_context *st = st_context(ctx);
-   for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
-      if (prog->_LinkedShaders[i] == NULL)
-         continue;
+   size_t size = prog->driver_cache_blob_size;
+   uint8_t *buffer = (uint8_t *) prog->driver_cache_blob;
 
-      struct gl_program *glprog = prog->_LinkedShaders[i]->Program;
+   struct blob_reader blob_reader;
+   blob_reader_init(&blob_reader, buffer, size);
 
-      size_t size = glprog->driver_cache_blob_size;
-      uint8_t *buffer = (uint8_t *) glprog->driver_cache_blob;
+   switch (prog->info.stage) {
+   case MESA_SHADER_VERTEX: {
+      struct st_vertex_program *stvp = (struct st_vertex_program *) prog;
 
-      struct blob_reader blob_reader;
-      blob_reader_init(&blob_reader, buffer, size);
+      st_release_vp_variants(st, stvp);
 
-      switch (glprog->info.stage) {
-      case MESA_SHADER_VERTEX: {
-         struct st_vertex_program *stvp = (struct st_vertex_program *) glprog;
+      stvp->num_inputs = blob_read_uint32(&blob_reader);
+      blob_copy_bytes(&blob_reader, (uint8_t *) stvp->index_to_input,
+                      sizeof(stvp->index_to_input));
+      blob_copy_bytes(&blob_reader, (uint8_t *) stvp->result_to_output,
+                      sizeof(stvp->result_to_output));
 
-         st_release_vp_variants(st, stvp);
+      read_stream_out_from_cache(&blob_reader, &stvp->tgsi);
+      read_tgsi_from_cache(&blob_reader, &stvp->tgsi.tokens);
 
-         stvp->num_inputs = blob_read_uint32(&blob_reader);
-         blob_copy_bytes(&blob_reader, (uint8_t *) stvp->index_to_input,
-                         sizeof(stvp->index_to_input));
-         blob_copy_bytes(&blob_reader, (uint8_t *) stvp->result_to_output,
-                         sizeof(stvp->result_to_output));
+      if (st->vp == stvp)
+         st->dirty |= ST_NEW_VERTEX_PROGRAM(st, stvp);
 
-         read_stream_out_from_cache(&blob_reader, &stvp->tgsi);
-         read_tgsi_from_cache(&blob_reader, &stvp->tgsi.tokens);
+      break;
+   }
+   case MESA_SHADER_TESS_CTRL: {
+      struct st_common_program *sttcp = st_common_program(prog);
 
-         if (st->vp == stvp)
-            st->dirty |= ST_NEW_VERTEX_PROGRAM(st, stvp);
+      st_release_basic_variants(st, sttcp->Base.Target,
+                                &sttcp->variants, &sttcp->tgsi);
 
-         break;
-      }
-      case MESA_SHADER_TESS_CTRL: {
-         struct st_common_program *sttcp = st_common_program(glprog);
+      read_stream_out_from_cache(&blob_reader, &sttcp->tgsi);
+      read_tgsi_from_cache(&blob_reader, &sttcp->tgsi.tokens);
 
-         st_release_basic_variants(st, sttcp->Base.Target,
-                                   &sttcp->variants, &sttcp->tgsi);
+      if (st->tcp == sttcp)
+         st->dirty |= sttcp->affected_states;
 
-         read_stream_out_from_cache(&blob_reader, &sttcp->tgsi);
-         read_tgsi_from_cache(&blob_reader, &sttcp->tgsi.tokens);
+      break;
+   }
+   case MESA_SHADER_TESS_EVAL: {
+      struct st_common_program *sttep = st_common_program(prog);
 
-         if (st->tcp == sttcp)
-            st->dirty |= sttcp->affected_states;
+      st_release_basic_variants(st, sttep->Base.Target,
+                                &sttep->variants, &sttep->tgsi);
 
-         break;
-      }
-      case MESA_SHADER_TESS_EVAL: {
-         struct st_common_program *sttep = st_common_program(glprog);
+      read_stream_out_from_cache(&blob_reader, &sttep->tgsi);
+      read_tgsi_from_cache(&blob_reader, &sttep->tgsi.tokens);
 
-         st_release_basic_variants(st, sttep->Base.Target,
-                                   &sttep->variants, &sttep->tgsi);
+      if (st->tep == sttep)
+         st->dirty |= sttep->affected_states;
 
-         read_stream_out_from_cache(&blob_reader, &sttep->tgsi);
-         read_tgsi_from_cache(&blob_reader, &sttep->tgsi.tokens);
+      break;
+   }
+   case MESA_SHADER_GEOMETRY: {
+      struct st_common_program *stgp = st_common_program(prog);
 
-         if (st->tep == sttep)
-            st->dirty |= sttep->affected_states;
+      st_release_basic_variants(st, stgp->Base.Target, &stgp->variants,
+                                &stgp->tgsi);
 
-         break;
-      }
-      case MESA_SHADER_GEOMETRY: {
-         struct st_common_program *stgp = st_common_program(glprog);
+      read_stream_out_from_cache(&blob_reader, &stgp->tgsi);
+      read_tgsi_from_cache(&blob_reader, &stgp->tgsi.tokens);
 
-         st_release_basic_variants(st, stgp->Base.Target, &stgp->variants,
-                                   &stgp->tgsi);
+      if (st->gp == stgp)
+         st->dirty |= stgp->affected_states;
 
-         read_stream_out_from_cache(&blob_reader, &stgp->tgsi);
-         read_tgsi_from_cache(&blob_reader, &stgp->tgsi.tokens);
+      break;
+   }
+   case MESA_SHADER_FRAGMENT: {
+      struct st_fragment_program *stfp = (struct st_fragment_program *) prog;
 
-         if (st->gp == stgp)
-            st->dirty |= stgp->affected_states;
+      st_release_fp_variants(st, stfp);
 
-         break;
-      }
-      case MESA_SHADER_FRAGMENT: {
-         struct st_fragment_program *stfp =
-            (struct st_fragment_program *) glprog;
+      read_tgsi_from_cache(&blob_reader, &stfp->tgsi.tokens);
 
-         st_release_fp_variants(st, stfp);
+      if (st->fp == stfp)
+         st->dirty |= stfp->affected_states;
 
-         read_tgsi_from_cache(&blob_reader, &stfp->tgsi.tokens);
+      break;
+   }
+   case MESA_SHADER_COMPUTE: {
+      struct st_compute_program *stcp = (struct st_compute_program *) prog;
 
-         if (st->fp == stfp)
-            st->dirty |= stfp->affected_states;
+      st_release_cp_variants(st, stcp);
 
-         break;
-      }
-      case MESA_SHADER_COMPUTE: {
-         struct st_compute_program *stcp =
-            (struct st_compute_program *) glprog;
+      read_tgsi_from_cache(&blob_reader,
+                           (const struct tgsi_token**) &stcp->tgsi.prog);
 
-         st_release_cp_variants(st, stcp);
+      stcp->tgsi.req_local_mem = stcp->Base.info.cs.shared_size;
+      stcp->tgsi.req_private_mem = 0;
+      stcp->tgsi.req_input_mem = 0;
 
-         read_tgsi_from_cache(&blob_reader,
-                              (const struct tgsi_token**) &stcp->tgsi.prog);
+      if (st->cp == stcp)
+         st->dirty |= stcp->affected_states;
 
-         stcp->tgsi.req_local_mem = stcp->Base.info.cs.shared_size;
-         stcp->tgsi.req_private_mem = 0;
-         stcp->tgsi.req_input_mem = 0;
+      break;
+   }
+   default:
+      unreachable("Unsupported stage");
+   }
 
-         if (st->cp == stcp)
-            st->dirty |= stcp->affected_states;
+   /* Make sure we don't try to read more data than we wrote. This should
+    * never happen in release builds but its useful to have this check to
+    * catch development bugs.
+    */
+   if (blob_reader.current != blob_reader.end || blob_reader.overrun) {
+      assert(!"Invalid TGSI shader disk cache item!");
 
-         break;
-      }
-      default:
-         unreachable("Unsupported stage");
+      if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
+         fprintf(stderr, "Error reading program from cache (invalid "
+                 "TGSI cache item)\n");
       }
+   }
 
-      /* Make sure we don't try to read more data than we wrote. This should
-       * never happen in release builds but its useful to have this check to
-       * catch development bugs.
-       */
-      if (blob_reader.current != blob_reader.end || blob_reader.overrun) {
-         assert(!"Invalid TGSI shader disk cache item!");
-
-         if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
-            fprintf(stderr, "Error reading program from cache (invalid "
-                    "TGSI cache item)\n");
-         }
-      }
+   st_set_prog_affected_state_flags(prog);
+   _mesa_associate_uniform_storage(ctx, shProg, prog, false);
 
-      if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
-         fprintf(stderr, "%s tgsi_tokens retrieved from cache\n",
-                 _mesa_shader_stage_to_string(i));
-      }
+   /* Create Gallium shaders now instead of on demand. */
+   if (ST_DEBUG & DEBUG_PRECOMPILE ||
+       st->shader_has_one_variant[prog->info.stage])
+      st_precompile_shader_variant(st, prog);
+}
+
+bool
+st_load_tgsi_from_disk_cache(struct gl_context *ctx,
+                             struct gl_shader_program *prog)
+{
+   if (!ctx->Cache)
+      return false;
+
+   /* If we didn't load the GLSL metadata from cache then we could not have
+    * loaded the tgsi either.
+    */
+   if (prog->data->LinkStatus != linking_skipped)
+      return false;
 
-      st_set_prog_affected_state_flags(glprog);
-      _mesa_associate_uniform_storage(ctx, prog, glprog, false);
+   for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
+      if (prog->_LinkedShaders[i] == NULL)
+         continue;
 
-      /* Create Gallium shaders now instead of on demand. */
-      if (ST_DEBUG & DEBUG_PRECOMPILE ||
-          st->shader_has_one_variant[glprog->info.stage])
-         st_precompile_shader_variant(st, glprog);
+      struct gl_program *glprog = prog->_LinkedShaders[i]->Program;
+      st_deserialise_tgsi_program(ctx, prog, glprog);
 
       /* We don't need the cached blob anymore so free it */
       ralloc_free(glprog->driver_cache_blob);
       glprog->driver_cache_blob = NULL;
       glprog->driver_cache_blob_size = 0;
+
+      if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
+         fprintf(stderr, "%s tgsi_tokens retrieved from cache\n",
+                 _mesa_shader_stage_to_string(i));
+      }
    }
 
    return true;
diff --git a/src/mesa/state_tracker/st_shader_cache.h b/src/mesa/state_tracker/st_shader_cache.h
index 81a2935d7ba..358c6ecef88 100644
--- a/src/mesa/state_tracker/st_shader_cache.h
+++ b/src/mesa/state_tracker/st_shader_cache.h
@@ -32,6 +32,14 @@
 extern "C" {
 #endif
 
+void
+st_serialise_tgsi_program(struct gl_context *ctx, struct gl_program *prog);
+
+void
+st_deserialise_tgsi_program(struct gl_context *ctx,
+                            struct gl_shader_program *shProg,
+                            struct gl_program *prog);
+
 bool
 st_load_tgsi_from_disk_cache(struct gl_context *ctx,
                              struct gl_shader_program *prog);