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-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_surface_state.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_surface_state.c b/src/mesa/drivers/dri/i965/brw_vs_surface_state.c
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index 00000000000..89f47522a1c
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_vs_surface_state.c
@@ -0,0 +1,226 @@
+/*
+ Copyright (C) Intel Corp. 2006. All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+
+ 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
+
+ **********************************************************************/
+ /*
+ * Authors:
+ * Keith Whitwell <[email protected]>
+ */
+
+#include "main/mtypes.h"
+#include "main/texformat.h"
+#include "main/texstore.h"
+#include "shader/prog_parameter.h"
+
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+
+/* Creates a new VS constant buffer reflecting the current VS program's
+ * constants, if needed by the VS program.
+ *
+ * Otherwise, constants go through the CURBEs using the brw_constant_buffer
+ * state atom.
+ */
+static drm_intel_bo *
+brw_vs_update_constant_buffer(struct brw_context *brw)
+{
+ struct intel_context *intel = &brw->intel;
+ struct brw_vertex_program *vp =
+ (struct brw_vertex_program *) brw->vertex_program;
+ const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
+ const int size = params->NumParameters * 4 * sizeof(GLfloat);
+ drm_intel_bo *const_buffer;
+
+ /* BRW_NEW_VERTEX_PROGRAM */
+ if (!vp->use_const_buffer)
+ return NULL;
+
+ const_buffer = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
+ size, 64);
+
+ /* _NEW_PROGRAM_CONSTANTS */
+ dri_bo_subdata(const_buffer, 0, size, params->ParameterValues);
+
+ return const_buffer;
+}
+
+/**
+ * Update the surface state for a VS constant buffer.
+ *
+ * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
+ */
+static void
+brw_update_vs_constant_surface( GLcontext *ctx,
+ GLuint surf)
+{
+ struct brw_context *brw = brw_context(ctx);
+ struct brw_surface_key key;
+ struct brw_vertex_program *vp =
+ (struct brw_vertex_program *) brw->vertex_program;
+ const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
+
+ assert(surf == 0);
+
+ /* If we're in this state update atom, we need to update VS constants, so
+ * free the old buffer and create a new one for the new contents.
+ */
+ dri_bo_unreference(vp->const_buffer);
+ vp->const_buffer = brw_vs_update_constant_buffer(brw);
+
+ /* If there's no constant buffer, then no surface BO is needed to point at
+ * it.
+ */
+ if (vp->const_buffer == 0) {
+ drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
+ brw->vs.surf_bo[surf] = NULL;
+ return;
+ }
+
+ memset(&key, 0, sizeof(key));
+
+ key.format = MESA_FORMAT_RGBA_FLOAT32;
+ key.internal_format = GL_RGBA;
+ key.bo = vp->const_buffer;
+ key.depthmode = GL_NONE;
+ key.pitch = params->NumParameters;
+ key.width = params->NumParameters;
+ key.height = 1;
+ key.depth = 1;
+ key.cpp = 16;
+
+ /*
+ printf("%s:\n", __FUNCTION__);
+ printf(" width %d height %d depth %d cpp %d pitch %d\n",
+ key.width, key.height, key.depth, key.cpp, key.pitch);
+ */
+
+ drm_intel_bo_unreference(brw->vs.surf_bo[surf]);
+ brw->vs.surf_bo[surf] = brw_search_cache(&brw->surface_cache,
+ BRW_SS_SURFACE,
+ &key, sizeof(key),
+ &key.bo, key.bo ? 1 : 0,
+ NULL);
+ if (brw->vs.surf_bo[surf] == NULL) {
+ brw->vs.surf_bo[surf] = brw_create_constant_surface(brw, &key);
+ }
+}
+
+
+/**
+ * Constructs the binding table for the VS surface state.
+ */
+static dri_bo *
+brw_vs_get_binding_table(struct brw_context *brw)
+{
+ dri_bo *bind_bo;
+
+ bind_bo = brw_search_cache(&brw->surface_cache, BRW_SS_SURF_BIND,
+ NULL, 0,
+ brw->vs.surf_bo, BRW_VS_MAX_SURF,
+ NULL);
+
+ if (bind_bo == NULL) {
+ GLuint data_size = BRW_VS_MAX_SURF * sizeof(GLuint);
+ uint32_t *data = malloc(data_size);
+ int i;
+
+ for (i = 0; i < BRW_VS_MAX_SURF; i++)
+ if (brw->vs.surf_bo[i])
+ data[i] = brw->vs.surf_bo[i]->offset;
+ else
+ data[i] = 0;
+
+ bind_bo = brw_upload_cache( &brw->surface_cache, BRW_SS_SURF_BIND,
+ NULL, 0,
+ brw->vs.surf_bo, BRW_VS_MAX_SURF,
+ data, data_size,
+ NULL, NULL);
+
+ /* Emit binding table relocations to surface state */
+ for (i = 0; i < BRW_VS_MAX_SURF; i++) {
+ if (brw->vs.surf_bo[i] != NULL) {
+ /* The presumed offsets were set in the data values for
+ * brw_upload_cache.
+ */
+ drm_intel_bo_emit_reloc(bind_bo, i * 4,
+ brw->vs.surf_bo[i], 0,
+ I915_GEM_DOMAIN_INSTRUCTION, 0);
+ }
+ }
+
+ free(data);
+ }
+
+ return bind_bo;
+}
+
+/**
+ * Vertex shader surfaces (constant buffer).
+ *
+ * This consumes the state updates for the constant buffer needing
+ * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
+ * CACHE_NEW_SURF_BIND for the binding table upload.
+ */
+static void prepare_vs_surfaces(struct brw_context *brw )
+{
+ GLcontext *ctx = &brw->intel.ctx;
+ int i;
+ int nr_surfaces = 0;
+
+ brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
+
+ for (i = 0; i < BRW_VS_MAX_SURF; i++) {
+ if (brw->vs.surf_bo[i] != NULL) {
+ nr_surfaces = i + 1;
+ }
+ }
+
+ if (brw->vs.nr_surfaces != nr_surfaces) {
+ brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
+ brw->vs.nr_surfaces = nr_surfaces;
+ }
+
+ /* Note that we don't end up updating the bind_bo if we don't have a
+ * surface to be pointing at. This should be relatively harmless, as it
+ * just slightly increases our working set size.
+ */
+ if (brw->vs.nr_surfaces != 0) {
+ dri_bo_unreference(brw->vs.bind_bo);
+ brw->vs.bind_bo = brw_vs_get_binding_table(brw);
+ }
+}
+
+const struct brw_tracked_state brw_vs_surfaces = {
+ .dirty = {
+ .mesa = (_NEW_PROGRAM_CONSTANTS),
+ .brw = (BRW_NEW_VERTEX_PROGRAM),
+ .cache = 0
+ },
+ .prepare = prepare_vs_surfaces,
+};
+
+
+
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