brw_vs_surface_state.c revision d375df220fae47f38944c4832bcbd5f5d568884c 
1/*
2 Copyright (C) Intel Corp.  2006.  All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
5
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
13
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25
26 **********************************************************************/
27 /*
28  * Authors:
29  *   Keith Whitwell <keith@tungstengraphics.com>
30  */
31
32#include "main/mtypes.h"
33#include "main/texstore.h"
34#include "program/prog_parameter.h"
35
36#include "brw_context.h"
37#include "brw_state.h"
38
39/* Creates a new VS constant buffer reflecting the current VS program's
40 * constants, if needed by the VS program.
41 *
42 * Otherwise, constants go through the CURBEs using the brw_constant_buffer
43 * state atom.
44 */
45static void
46prepare_vs_constants(struct brw_context *brw)
47{
48   struct gl_context *ctx = &brw->intel.ctx;
49   struct intel_context *intel = &brw->intel;
50   struct brw_vertex_program *vp =
51      (struct brw_vertex_program *) brw->vertex_program;
52   const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
53   const int size = params->NumParameters * 4 * sizeof(GLfloat);
54   int i;
55
56   if (vp->program.IsNVProgram)
57      _mesa_load_tracked_matrices(ctx);
58
59   /* Updates the ParamaterValues[i] pointers for all parameters of the
60    * basic type of PROGRAM_STATE_VAR.
61    */
62   _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters);
63
64   /* BRW_NEW_VERTEX_PROGRAM */
65   if (!vp->use_const_buffer) {
66      if (brw->vs.const_bo) {
67	 drm_intel_bo_unreference(brw->vs.const_bo);
68	 brw->vs.const_bo = NULL;
69	 brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
70      }
71      return;
72   }
73
74   /* _NEW_PROGRAM_CONSTANTS */
75   drm_intel_bo_unreference(brw->vs.const_bo);
76   brw->vs.const_bo = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
77					 size, 64);
78
79   drm_intel_gem_bo_map_gtt(brw->vs.const_bo);
80   for (i = 0; i < params->NumParameters; i++) {
81      memcpy(brw->vs.const_bo->virtual + i * 4 * sizeof(float),
82	     params->ParameterValues[i],
83	     4 * sizeof(float));
84   }
85
86   if (0) {
87      for (i = 0; i < params->NumParameters; i++) {
88	 float *row = (float *)brw->vs.const_bo->virtual + i * 4;
89	 printf("vs const surface %3d: %4.3f %4.3f %4.3f %4.3f\n",
90		i, row[0], row[1], row[2], row[3]);
91      }
92   }
93
94   drm_intel_gem_bo_unmap_gtt(brw->vs.const_bo);
95   brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
96}
97
98const struct brw_tracked_state brw_vs_constants = {
99   .dirty = {
100      .mesa = (_NEW_PROGRAM_CONSTANTS),
101      .brw = (BRW_NEW_VERTEX_PROGRAM),
102      .cache = 0
103   },
104   .prepare = prepare_vs_constants,
105};
106
107/**
108 * Update the surface state for a VS constant buffer.
109 *
110 * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer.
111 */
112static void
113brw_update_vs_constant_surface( struct gl_context *ctx,
114                                GLuint surf)
115{
116   struct brw_context *brw = brw_context(ctx);
117   struct intel_context *intel = &brw->intel;
118   struct brw_vertex_program *vp =
119      (struct brw_vertex_program *) brw->vertex_program;
120   const struct gl_program_parameter_list *params = vp->program.Base.Parameters;
121
122   assert(surf == 0);
123
124   /* If there's no constant buffer, then no surface BO is needed to point at
125    * it.
126    */
127   if (brw->vs.const_bo == NULL) {
128      brw->vs.surf_offset[surf] = 0;
129      return;
130   }
131
132   if (intel->gen >= 7) {
133      gen7_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
134				  &brw->vs.surf_offset[surf]);
135   } else {
136      brw_create_constant_surface(brw, brw->vs.const_bo, params->NumParameters,
137				  &brw->vs.surf_offset[surf]);
138   }
139}
140
141
142static void
143prepare_vs_surfaces(struct brw_context *brw)
144{
145   int nr_surfaces = 0;
146
147   if (brw->vs.const_bo) {
148      brw_add_validated_bo(brw, brw->vs.const_bo);
149      nr_surfaces = 1;
150   }
151
152   if (brw->vs.nr_surfaces != nr_surfaces) {
153      brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
154      brw->vs.nr_surfaces = nr_surfaces;
155   }
156}
157
158/**
159 * Vertex shader surfaces (constant buffer).
160 *
161 * This consumes the state updates for the constant buffer needing
162 * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
163 * CACHE_NEW_SURF_BIND for the binding table upload.
164 */
165static void upload_vs_surfaces(struct brw_context *brw)
166{
167   struct gl_context *ctx = &brw->intel.ctx;
168   uint32_t *bind;
169   int i;
170
171   /* BRW_NEW_NR_VS_SURFACES */
172   if (brw->vs.nr_surfaces == 0) {
173      if (brw->vs.bind_bo_offset) {
174	 brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
175      }
176      brw->vs.bind_bo_offset = 0;
177      return;
178   }
179
180   brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
181
182   /* Might want to calculate nr_surfaces first, to avoid taking up so much
183    * space for the binding table. (once we have vs samplers)
184    */
185   bind = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
186			  sizeof(uint32_t) * BRW_VS_MAX_SURF,
187			  32, &brw->vs.bind_bo_offset);
188
189   for (i = 0; i < BRW_VS_MAX_SURF; i++) {
190      /* BRW_NEW_VS_CONSTBUF */
191      bind[i] = brw->vs.surf_offset[i];
192   }
193
194   brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
195}
196
197const struct brw_tracked_state brw_vs_surfaces = {
198   .dirty = {
199      .mesa = 0,
200      .brw = (BRW_NEW_VS_CONSTBUF |
201	      BRW_NEW_NR_VS_SURFACES |
202	      BRW_NEW_BATCH),
203      .cache = 0
204   },
205   .prepare = prepare_vs_surfaces,
206   .emit = upload_vs_surfaces,
207};
208