brw_vs_surface_state.c revision eaf4d3e6e2493a6e0b20d1205a5fb33ce500c9c2 
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 "program/prog_parameter.h"
34
35#include "brw_context.h"
36#include "brw_state.h"
37
38/* Creates a new VS constant buffer reflecting the current VS program's
39 * constants, if needed by the VS program.
40 *
41 * Otherwise, constants go through the CURBEs using the brw_constant_buffer
42 * state atom.
43 */
44static void
45prepare_vs_constants(struct brw_context *brw)
46{
47   struct gl_context *ctx = &brw->intel.ctx;
48   struct intel_context *intel = &brw->intel;
49   /* BRW_NEW_VERTEX_PROGRAM */
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   int i;
54
55   if (vp->program.IsNVProgram)
56      _mesa_load_tracked_matrices(ctx);
57
58   /* Updates the ParamaterValues[i] pointers for all parameters of the
59    * basic type of PROGRAM_STATE_VAR.
60    */
61   _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters);
62
63   /* CACHE_NEW_VS_PROG */
64   if (!brw->vs.prog_data->nr_pull_params) {
65      if (brw->vs.const_bo) {
66	 drm_intel_bo_unreference(brw->vs.const_bo);
67	 brw->vs.const_bo = NULL;
68	 brw->state.dirty.brw |= BRW_NEW_VS_CONSTBUF;
69      }
70      return;
71   }
72
73   /* _NEW_PROGRAM_CONSTANTS */
74   drm_intel_bo_unreference(brw->vs.const_bo);
75   brw->vs.const_bo = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer",
76					 brw->vs.prog_data->nr_pull_params * 4,
77					 64);
78
79   drm_intel_gem_bo_map_gtt(brw->vs.const_bo);
80   for (i = 0; i < brw->vs.prog_data->nr_pull_params; i++) {
81      memcpy(brw->vs.const_bo->virtual + i * 4,
82	     brw->vs.prog_data->pull_param[i],
83	     4);
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 = CACHE_NEW_VS_PROG,
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      nr_surfaces = 1;
149   }
150
151   if (brw->vs.nr_surfaces != nr_surfaces) {
152      brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES;
153      brw->vs.nr_surfaces = nr_surfaces;
154   }
155}
156
157/**
158 * Vertex shader surfaces (constant buffer).
159 *
160 * This consumes the state updates for the constant buffer needing
161 * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and
162 * CACHE_NEW_SURF_BIND for the binding table upload.
163 */
164static void upload_vs_surfaces(struct brw_context *brw)
165{
166   struct gl_context *ctx = &brw->intel.ctx;
167   uint32_t *bind;
168   int i;
169
170   /* BRW_NEW_NR_VS_SURFACES */
171   if (brw->vs.nr_surfaces == 0) {
172      if (brw->vs.bind_bo_offset) {
173	 brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
174      }
175      brw->vs.bind_bo_offset = 0;
176      return;
177   }
178
179   brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER);
180
181   /* Might want to calculate nr_surfaces first, to avoid taking up so much
182    * space for the binding table. (once we have vs samplers)
183    */
184   bind = brw_state_batch(brw, AUB_TRACE_SURFACE_STATE,
185			  sizeof(uint32_t) * BRW_VS_MAX_SURF,
186			  32, &brw->vs.bind_bo_offset);
187
188   for (i = 0; i < BRW_VS_MAX_SURF; i++) {
189      /* BRW_NEW_VS_CONSTBUF */
190      bind[i] = brw->vs.surf_offset[i];
191   }
192
193   brw->state.dirty.brw |= BRW_NEW_VS_BINDING_TABLE;
194}
195
196const struct brw_tracked_state brw_vs_surfaces = {
197   .dirty = {
198      .mesa = 0,
199      .brw = (BRW_NEW_VS_CONSTBUF |
200	      BRW_NEW_NR_VS_SURFACES |
201	      BRW_NEW_BATCH),
202      .cache = 0
203   },
204   .prepare = prepare_vs_surfaces,
205   .emit = upload_vs_surfaces,
206};
207