brw_vs_surface_state.c revision bb35000b4b6dfe60048b2f5d60bc102c4a7fd791
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 "shader/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 drm_intel_bo * 46brw_vs_update_constant_buffer(struct brw_context *brw) 47{ 48 struct intel_context *intel = &brw->intel; 49 struct brw_vertex_program *vp = 50 (struct brw_vertex_program *) brw->vertex_program; 51 const struct gl_program_parameter_list *params = vp->program.Base.Parameters; 52 const int size = params->NumParameters * 4 * sizeof(GLfloat); 53 drm_intel_bo *const_buffer; 54 int i; 55 56 /* BRW_NEW_VERTEX_PROGRAM */ 57 if (!vp->use_const_buffer) 58 return NULL; 59 60 const_buffer = drm_intel_bo_alloc(intel->bufmgr, "vp_const_buffer", 61 size, 64); 62 63 /* _NEW_PROGRAM_CONSTANTS */ 64 65 /* Updates the ParamaterValues[i] pointers for all parameters of the 66 * basic type of PROGRAM_STATE_VAR. 67 */ 68 _mesa_load_state_parameters(&brw->intel.ctx, vp->program.Base.Parameters); 69 70 drm_intel_gem_bo_map_gtt(const_buffer); 71 for (i = 0; i < params->NumParameters; i++) { 72 memcpy(const_buffer->virtual + i * 4 * sizeof(float), 73 params->ParameterValues[i], 74 4 * sizeof(float)); 75 } 76 drm_intel_gem_bo_unmap_gtt(const_buffer); 77 78 return const_buffer; 79} 80 81/** 82 * Update the surface state for a VS constant buffer. 83 * 84 * Sets brw->vs.surf_bo[surf] and brw->vp->const_buffer. 85 */ 86static void 87brw_update_vs_constant_surface( GLcontext *ctx, 88 GLuint surf) 89{ 90 struct brw_context *brw = brw_context(ctx); 91 struct brw_surface_key key; 92 struct brw_vertex_program *vp = 93 (struct brw_vertex_program *) brw->vertex_program; 94 const struct gl_program_parameter_list *params = vp->program.Base.Parameters; 95 96 assert(surf == 0); 97 98 /* If we're in this state update atom, we need to update VS constants, so 99 * free the old buffer and create a new one for the new contents. 100 */ 101 dri_bo_unreference(vp->const_buffer); 102 vp->const_buffer = brw_vs_update_constant_buffer(brw); 103 104 /* If there's no constant buffer, then no surface BO is needed to point at 105 * it. 106 */ 107 if (vp->const_buffer == 0) { 108 drm_intel_bo_unreference(brw->vs.surf_bo[surf]); 109 brw->vs.surf_bo[surf] = NULL; 110 return; 111 } 112 113 memset(&key, 0, sizeof(key)); 114 115 key.format = MESA_FORMAT_RGBA_FLOAT32; 116 key.internal_format = GL_RGBA; 117 key.bo = vp->const_buffer; 118 key.depthmode = GL_NONE; 119 key.pitch = params->NumParameters; 120 key.width = params->NumParameters; 121 key.height = 1; 122 key.depth = 1; 123 key.cpp = 16; 124 125 /* 126 printf("%s:\n", __FUNCTION__); 127 printf(" width %d height %d depth %d cpp %d pitch %d\n", 128 key.width, key.height, key.depth, key.cpp, key.pitch); 129 */ 130 131 drm_intel_bo_unreference(brw->vs.surf_bo[surf]); 132 brw->vs.surf_bo[surf] = brw_search_cache(&brw->surface_cache, 133 BRW_SS_SURFACE, 134 &key, sizeof(key), 135 &key.bo, key.bo ? 1 : 0, 136 NULL); 137 if (brw->vs.surf_bo[surf] == NULL) { 138 brw->vs.surf_bo[surf] = brw_create_constant_surface(brw, &key); 139 } 140} 141 142 143/** 144 * Constructs the binding table for the VS surface state. 145 */ 146static dri_bo * 147brw_vs_get_binding_table(struct brw_context *brw) 148{ 149 dri_bo *bind_bo; 150 151 bind_bo = brw_search_cache(&brw->surface_cache, BRW_SS_SURF_BIND, 152 NULL, 0, 153 brw->vs.surf_bo, BRW_VS_MAX_SURF, 154 NULL); 155 156 if (bind_bo == NULL) { 157 GLuint data_size = BRW_VS_MAX_SURF * sizeof(GLuint); 158 uint32_t data[BRW_VS_MAX_SURF]; 159 int i; 160 161 for (i = 0; i < BRW_VS_MAX_SURF; i++) 162 if (brw->vs.surf_bo[i]) 163 data[i] = brw->vs.surf_bo[i]->offset; 164 else 165 data[i] = 0; 166 167 bind_bo = brw_upload_cache( &brw->surface_cache, BRW_SS_SURF_BIND, 168 NULL, 0, 169 brw->vs.surf_bo, BRW_VS_MAX_SURF, 170 data, data_size); 171 172 /* Emit binding table relocations to surface state */ 173 for (i = 0; i < BRW_VS_MAX_SURF; i++) { 174 if (brw->vs.surf_bo[i] != NULL) { 175 /* The presumed offsets were set in the data values for 176 * brw_upload_cache. 177 */ 178 drm_intel_bo_emit_reloc(bind_bo, i * 4, 179 brw->vs.surf_bo[i], 0, 180 I915_GEM_DOMAIN_INSTRUCTION, 0); 181 } 182 } 183 } 184 185 return bind_bo; 186} 187 188/** 189 * Vertex shader surfaces (constant buffer). 190 * 191 * This consumes the state updates for the constant buffer needing 192 * to be updated, and produces BRW_NEW_NR_VS_SURFACES for the VS unit and 193 * CACHE_NEW_SURF_BIND for the binding table upload. 194 */ 195static void prepare_vs_surfaces(struct brw_context *brw ) 196{ 197 GLcontext *ctx = &brw->intel.ctx; 198 int i; 199 int nr_surfaces = 0; 200 201 brw_update_vs_constant_surface(ctx, SURF_INDEX_VERT_CONST_BUFFER); 202 203 for (i = 0; i < BRW_VS_MAX_SURF; i++) { 204 if (brw->vs.surf_bo[i] != NULL) { 205 nr_surfaces = i + 1; 206 } 207 } 208 209 if (brw->vs.nr_surfaces != nr_surfaces) { 210 brw->state.dirty.brw |= BRW_NEW_NR_VS_SURFACES; 211 brw->vs.nr_surfaces = nr_surfaces; 212 } 213 214 /* Note that we don't end up updating the bind_bo if we don't have a 215 * surface to be pointing at. This should be relatively harmless, as it 216 * just slightly increases our working set size. 217 */ 218 if (brw->vs.nr_surfaces != 0) { 219 dri_bo_unreference(brw->vs.bind_bo); 220 brw->vs.bind_bo = brw_vs_get_binding_table(brw); 221 } 222} 223 224const struct brw_tracked_state brw_vs_surfaces = { 225 .dirty = { 226 .mesa = (_NEW_PROGRAM_CONSTANTS), 227 .brw = (BRW_NEW_VERTEX_PROGRAM), 228 .cache = 0 229 }, 230 .prepare = prepare_vs_surfaces, 231}; 232 233 234 235