brw_context.c revision 2f82c33deefba61b3e72edb4375850c0629af224 
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
33#include "main/imports.h"
34#include "main/api_noop.h"
35#include "main/macros.h"
36#include "main/simple_list.h"
37#include "brw_context.h"
38#include "brw_defines.h"
39#include "brw_draw.h"
40#include "brw_state.h"
41#include "intel_span.h"
42#include "tnl/t_pipeline.h"
43#include "glsl/ralloc.h"
44
45/***************************************
46 * Mesa's Driver Functions
47 ***************************************/
48
49static void brwInitDriverFunctions( struct dd_function_table *functions )
50{
51   intelInitDriverFunctions( functions );
52
53   brwInitFragProgFuncs( functions );
54   brw_init_queryobj_functions(functions);
55}
56
57GLboolean brwCreateContext( int api,
58			    const struct gl_config *mesaVis,
59			    __DRIcontext *driContextPriv,
60			    void *sharedContextPrivate)
61{
62   struct dd_function_table functions;
63   struct brw_context *brw = rzalloc(NULL, struct brw_context);
64   struct intel_context *intel = &brw->intel;
65   struct gl_context *ctx = &intel->ctx;
66   unsigned i;
67
68   if (!brw) {
69      printf("%s: failed to alloc context\n", __FUNCTION__);
70      return GL_FALSE;
71   }
72
73   brwInitVtbl( brw );
74   brwInitDriverFunctions( &functions );
75
76   if (!intelInitContext( intel, api, mesaVis, driContextPriv,
77			  sharedContextPrivate, &functions )) {
78      printf("%s: failed to init intel context\n", __FUNCTION__);
79      FREE(brw);
80      return GL_FALSE;
81   }
82
83   /* Initialize swrast, tnl driver tables: */
84   intelInitSpanFuncs(ctx);
85
86   TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
87
88   ctx->Const.MaxDrawBuffers = BRW_MAX_DRAW_BUFFERS;
89   ctx->Const.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
90   ctx->Const.MaxTextureCoordUnits = 8; /* Mesa limit */
91   ctx->Const.MaxTextureUnits = MIN2(ctx->Const.MaxTextureCoordUnits,
92                                     ctx->Const.MaxTextureImageUnits);
93   ctx->Const.MaxVertexTextureImageUnits = 0; /* no vertex shader textures */
94   ctx->Const.MaxCombinedTextureImageUnits =
95      ctx->Const.MaxVertexTextureImageUnits +
96      ctx->Const.MaxTextureImageUnits;
97
98   ctx->Const.MaxTextureLevels = 14; /* 8192 */
99   if (ctx->Const.MaxTextureLevels > MAX_TEXTURE_LEVELS)
100	   ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
101   ctx->Const.Max3DTextureLevels = 9;
102   ctx->Const.MaxCubeTextureLevels = 12;
103   ctx->Const.MaxTextureRectSize = (1<<12);
104
105   ctx->Const.MaxTextureMaxAnisotropy = 16.0;
106
107   /* if conformance mode is set, swrast can handle any size AA point */
108   ctx->Const.MaxPointSizeAA = 255.0;
109
110   /* We want the GLSL compiler to emit code that uses condition codes */
111   for (i = 0; i <= MESA_SHADER_FRAGMENT; i++) {
112      ctx->ShaderCompilerOptions[i].EmitCondCodes = GL_TRUE;
113      ctx->ShaderCompilerOptions[i].EmitNVTempInitialization = GL_TRUE;
114      ctx->ShaderCompilerOptions[i].EmitNoNoise = GL_TRUE;
115      ctx->ShaderCompilerOptions[i].EmitNoMainReturn = GL_TRUE;
116      ctx->ShaderCompilerOptions[i].EmitNoIndirectInput = GL_TRUE;
117      ctx->ShaderCompilerOptions[i].EmitNoIndirectOutput = GL_TRUE;
118
119      ctx->ShaderCompilerOptions[i].EmitNoIndirectUniform =
120	 (i == MESA_SHADER_FRAGMENT);
121      ctx->ShaderCompilerOptions[i].EmitNoIndirectTemp =
122	 (i == MESA_SHADER_FRAGMENT);
123   }
124
125   ctx->Const.VertexProgram.MaxNativeInstructions = (16 * 1024);
126   ctx->Const.VertexProgram.MaxAluInstructions = 0;
127   ctx->Const.VertexProgram.MaxTexInstructions = 0;
128   ctx->Const.VertexProgram.MaxTexIndirections = 0;
129   ctx->Const.VertexProgram.MaxNativeAluInstructions = 0;
130   ctx->Const.VertexProgram.MaxNativeTexInstructions = 0;
131   ctx->Const.VertexProgram.MaxNativeTexIndirections = 0;
132   ctx->Const.VertexProgram.MaxNativeAttribs = 16;
133   ctx->Const.VertexProgram.MaxNativeTemps = 256;
134   ctx->Const.VertexProgram.MaxNativeAddressRegs = 1;
135   ctx->Const.VertexProgram.MaxNativeParameters = 1024;
136   ctx->Const.VertexProgram.MaxEnvParams =
137      MIN2(ctx->Const.VertexProgram.MaxNativeParameters,
138	   ctx->Const.VertexProgram.MaxEnvParams);
139
140   ctx->Const.FragmentProgram.MaxNativeInstructions = (16 * 1024);
141   ctx->Const.FragmentProgram.MaxNativeAluInstructions = (16 * 1024);
142   ctx->Const.FragmentProgram.MaxNativeTexInstructions = (16 * 1024);
143   ctx->Const.FragmentProgram.MaxNativeTexIndirections = (16 * 1024);
144   ctx->Const.FragmentProgram.MaxNativeAttribs = 12;
145   ctx->Const.FragmentProgram.MaxNativeTemps = 256;
146   ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0;
147   ctx->Const.FragmentProgram.MaxNativeParameters = 1024;
148   ctx->Const.FragmentProgram.MaxEnvParams =
149      MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
150	   ctx->Const.FragmentProgram.MaxEnvParams);
151
152   /* Fragment shaders use real, 32-bit twos-complement integers for all
153    * integer types.
154    */
155   ctx->Const.FragmentProgram.LowInt.RangeMin = 31;
156   ctx->Const.FragmentProgram.LowInt.RangeMax = 30;
157   ctx->Const.FragmentProgram.LowInt.Precision = 0;
158   ctx->Const.FragmentProgram.HighInt = ctx->Const.FragmentProgram.MediumInt
159      = ctx->Const.FragmentProgram.LowInt;
160
161   /* Gen6 converts quads to polygon in beginning of 3D pipeline,
162      but we're not sure how it's actually done for vertex order,
163      that affect provoking vertex decision. Always use last vertex
164      convention for quad primitive which works as expected for now. */
165   if (intel->gen >= 6)
166       ctx->Const.QuadsFollowProvokingVertexConvention = GL_FALSE;
167
168   if (intel->is_g4x || intel->gen >= 5) {
169      brw->CMD_VF_STATISTICS = GM45_3DSTATE_VF_STATISTICS;
170      brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_GM45;
171      brw->has_surface_tile_offset = GL_TRUE;
172      if (intel->gen < 6)
173	  brw->has_compr4 = GL_TRUE;
174      brw->has_aa_line_parameters = GL_TRUE;
175      brw->has_pln = GL_TRUE;
176  } else {
177      brw->CMD_VF_STATISTICS = GEN4_3DSTATE_VF_STATISTICS;
178      brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_965;
179   }
180
181   /* WM maximum threads is number of EUs times number of threads per EU. */
182   if (intel->gen >= 7) {
183      if (IS_IVB_GT1(intel->intelScreen->deviceID)) {
184	 brw->wm_max_threads = 86;
185	 brw->vs_max_threads = 36;
186	 brw->urb.size = 128;
187	 brw->urb.max_vs_entries = 512;
188	 brw->urb.max_gs_entries = 192;
189      } else if (IS_IVB_GT2(intel->intelScreen->deviceID)) {
190	 brw->wm_max_threads = 86;
191	 brw->vs_max_threads = 128;
192	 brw->urb.size = 256;
193	 brw->urb.max_vs_entries = 704;
194	 brw->urb.max_gs_entries = 320;
195      } else {
196	 assert(!"Unknown gen7 device.");
197      }
198   } else if (intel->gen == 6) {
199      if (IS_SNB_GT2(intel->intelScreen->deviceID)) {
200	 /* This could possibly be 80, but is supposed to require
201	  * disabling of WIZ hashing (bit 6 of GT_MODE, 0x20d0) and a
202	  * GPU reset to change.
203	  */
204	 brw->wm_max_threads = 40;
205	 brw->vs_max_threads = 60;
206	 brw->urb.size = 64;            /* volume 5c.5 section 5.1 */
207	 brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
208      } else {
209	 brw->wm_max_threads = 40;
210	 brw->vs_max_threads = 24;
211	 brw->urb.size = 32;            /* volume 5c.5 section 5.1 */
212	 brw->urb.max_vs_entries = 128; /* volume 2a (see 3DSTATE_URB) */
213      }
214   } else if (intel->gen == 5) {
215      brw->urb.size = 1024;
216      brw->vs_max_threads = 72;
217      brw->wm_max_threads = 12 * 6;
218   } else if (intel->is_g4x) {
219      brw->urb.size = 384;
220      brw->vs_max_threads = 32;
221      brw->wm_max_threads = 10 * 5;
222   } else if (intel->gen < 6) {
223      brw->urb.size = 256;
224      brw->vs_max_threads = 16;
225      brw->wm_max_threads = 8 * 4;
226      brw->has_negative_rhw_bug = GL_TRUE;
227   }
228
229   if (INTEL_DEBUG & DEBUG_SINGLE_THREAD) {
230      brw->vs_max_threads = 1;
231      brw->wm_max_threads = 1;
232   }
233
234   brw_init_state( brw );
235
236   brw->curbe.last_buf = calloc(1, 4096);
237   brw->curbe.next_buf = calloc(1, 4096);
238
239   brw->state.dirty.mesa = ~0;
240   brw->state.dirty.brw = ~0;
241
242   brw->emit_state_always = 0;
243
244   intel->batch.need_workaround_flush = true;
245
246   ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
247   ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
248
249   brw_draw_init( brw );
250
251   brw->new_vs_backend = (getenv("INTEL_NEW_VS") != NULL);
252
253   return GL_TRUE;
254}
255
256