brw_context.c revision 0e0d66446194ab0b2d114dc83e76ec9c9b1a01f1 
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/macros.h"
35#include "main/simple_list.h"
36
37#include "vbo/vbo_context.h"
38
39#include "brw_context.h"
40#include "brw_defines.h"
41#include "brw_draw.h"
42#include "brw_state.h"
43
44#include "intel_fbo.h"
45#include "intel_mipmap_tree.h"
46#include "intel_regions.h"
47#include "intel_span.h"
48#include "intel_tex.h"
49#include "intel_tex_obj.h"
50
51#include "tnl/t_pipeline.h"
52#include "glsl/ralloc.h"
53
54/***************************************
55 * Mesa's Driver Functions
56 ***************************************/
57
58static void brwInitDriverFunctions(struct intel_screen *screen,
59				   struct dd_function_table *functions)
60{
61   intelInitDriverFunctions( functions );
62
63   brwInitFragProgFuncs( functions );
64   brw_init_queryobj_functions(functions);
65
66   functions->BeginTransformFeedback = brw_begin_transform_feedback;
67
68   if (screen->gen >= 7)
69      functions->EndTransformFeedback = gen7_end_transform_feedback;
70   else
71      functions->EndTransformFeedback = brw_end_transform_feedback;
72}
73
74bool
75brwCreateContext(int api,
76	         const struct gl_config *mesaVis,
77		 __DRIcontext *driContextPriv,
78                 unsigned major_version,
79                 unsigned minor_version,
80                 uint32_t flags,
81                 unsigned *error,
82	         void *sharedContextPrivate)
83{
84   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
85   struct intel_screen *screen = sPriv->driverPrivate;
86   struct dd_function_table functions;
87   unsigned i;
88
89   /* Filter against the requested API and version.
90    */
91   switch (api) {
92   case API_OPENGL: {
93#ifdef TEXTURE_FLOAT_ENABLED
94      const unsigned max_version =
95         (screen->gen == 6 ||
96          (screen->gen == 7 && screen->kernel_has_gen7_sol_reset))
97         ? 30 : 21;
98#else
99      const unsigned max_version = 21;
100#endif
101      const unsigned req_version = major_version * 10 + minor_version;
102
103      if (req_version > max_version) {
104         *error = __DRI_CTX_ERROR_BAD_VERSION;
105         return false;
106      }
107      break;
108   }
109   case API_OPENGLES:
110   case API_OPENGLES2:
111      break;
112   case API_OPENGL_CORE: {
113#ifdef TEXTURE_FLOAT_ENABLED
114      const unsigned max_version =
115         (screen->gen == 6 ||
116          (screen->gen == 7 && screen->kernel_has_gen7_sol_reset))
117         ? 31 : 0;
118      const unsigned req_version = major_version * 10 + minor_version;
119
120      if (req_version > max_version) {
121         *error = (max_version == 0)
122            ? __DRI_CTX_ERROR_BAD_API : __DRI_CTX_ERROR_BAD_VERSION;
123         return false;
124      }
125      break;
126#else
127      *error = __DRI_CTX_ERROR_BAD_API;
128      return false;
129#endif
130   }
131   default:
132      *error = __DRI_CTX_ERROR_BAD_API;
133      return false;
134   }
135
136   struct brw_context *brw = rzalloc(NULL, struct brw_context);
137   if (!brw) {
138      printf("%s: failed to alloc context\n", __FUNCTION__);
139      *error = __DRI_CTX_ERROR_NO_MEMORY;
140      return false;
141   }
142
143   brwInitDriverFunctions(screen, &functions);
144
145   struct intel_context *intel = &brw->intel;
146   struct gl_context *ctx = &intel->ctx;
147
148   if (!intelInitContext( intel, api, mesaVis, driContextPriv,
149			  sharedContextPrivate, &functions )) {
150      printf("%s: failed to init intel context\n", __FUNCTION__);
151      FREE(brw);
152      *error = __DRI_CTX_ERROR_NO_MEMORY;
153      return false;
154   }
155
156   brwInitVtbl( brw );
157
158   brw_init_surface_formats(brw);
159
160   /* Initialize swrast, tnl driver tables: */
161   intelInitSpanFuncs(ctx);
162
163   TNLcontext *tnl = TNL_CONTEXT(ctx);
164   if (tnl)
165      tnl->Driver.RunPipeline = _tnl_run_pipeline;
166
167   ctx->Const.MaxDualSourceDrawBuffers = 1;
168   ctx->Const.MaxDrawBuffers = BRW_MAX_DRAW_BUFFERS;
169   ctx->Const.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
170   ctx->Const.MaxTextureCoordUnits = 8; /* Mesa limit */
171   ctx->Const.MaxTextureUnits = MIN2(ctx->Const.MaxTextureCoordUnits,
172                                     ctx->Const.MaxTextureImageUnits);
173   ctx->Const.MaxVertexTextureImageUnits = BRW_MAX_TEX_UNIT;
174   ctx->Const.MaxCombinedTextureImageUnits =
175      ctx->Const.MaxVertexTextureImageUnits +
176      ctx->Const.MaxTextureImageUnits;
177
178   ctx->Const.MaxTextureLevels = 14; /* 8192 */
179   if (ctx->Const.MaxTextureLevels > MAX_TEXTURE_LEVELS)
180	   ctx->Const.MaxTextureLevels = MAX_TEXTURE_LEVELS;
181   ctx->Const.Max3DTextureLevels = 9;
182   ctx->Const.MaxCubeTextureLevels = 12;
183
184   if (intel->gen >= 7)
185      ctx->Const.MaxArrayTextureLayers = 2048;
186   else
187      ctx->Const.MaxArrayTextureLayers = 512;
188
189   ctx->Const.MaxTextureRectSize = (1<<12);
190
191   ctx->Const.MaxTextureMaxAnisotropy = 16.0;
192
193   /* Hardware only supports a limited number of transform feedback buffers.
194    * So we need to override the Mesa default (which is based only on software
195    * limits).
196    */
197   ctx->Const.MaxTransformFeedbackBuffers = BRW_MAX_SOL_BUFFERS;
198
199   /* On Gen6, in the worst case, we use up one binding table entry per
200    * transform feedback component (see comments above the definition of
201    * BRW_MAX_SOL_BINDINGS, in brw_context.h), so we need to advertise a value
202    * for MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS equal to
203    * BRW_MAX_SOL_BINDINGS.
204    *
205    * In "separate components" mode, we need to divide this value by
206    * BRW_MAX_SOL_BUFFERS, so that the total number of binding table entries
207    * used up by all buffers will not exceed BRW_MAX_SOL_BINDINGS.
208    */
209   ctx->Const.MaxTransformFeedbackInterleavedComponents = BRW_MAX_SOL_BINDINGS;
210   ctx->Const.MaxTransformFeedbackSeparateComponents =
211      BRW_MAX_SOL_BINDINGS / BRW_MAX_SOL_BUFFERS;
212
213   if (intel->gen == 6)
214      ctx->Const.MaxSamples = 4;
215   else if (intel->gen >= 7)
216      ctx->Const.MaxSamples = 8;
217
218   /* if conformance mode is set, swrast can handle any size AA point */
219   ctx->Const.MaxPointSizeAA = 255.0;
220
221   /* We want the GLSL compiler to emit code that uses condition codes */
222   for (i = 0; i <= MESA_SHADER_FRAGMENT; i++) {
223      ctx->ShaderCompilerOptions[i].MaxIfDepth = intel->gen < 6 ? 16 : UINT_MAX;
224      ctx->ShaderCompilerOptions[i].EmitCondCodes = true;
225      ctx->ShaderCompilerOptions[i].EmitNVTempInitialization = true;
226      ctx->ShaderCompilerOptions[i].EmitNoNoise = true;
227      ctx->ShaderCompilerOptions[i].EmitNoMainReturn = true;
228      ctx->ShaderCompilerOptions[i].EmitNoIndirectInput = true;
229      ctx->ShaderCompilerOptions[i].EmitNoIndirectOutput = true;
230
231      ctx->ShaderCompilerOptions[i].EmitNoIndirectUniform =
232	 (i == MESA_SHADER_FRAGMENT);
233      ctx->ShaderCompilerOptions[i].EmitNoIndirectTemp =
234	 (i == MESA_SHADER_FRAGMENT);
235      ctx->ShaderCompilerOptions[i].LowerClipDistance = true;
236   }
237
238   ctx->Const.VertexProgram.MaxNativeInstructions = (16 * 1024);
239   ctx->Const.VertexProgram.MaxAluInstructions = 0;
240   ctx->Const.VertexProgram.MaxTexInstructions = 0;
241   ctx->Const.VertexProgram.MaxTexIndirections = 0;
242   ctx->Const.VertexProgram.MaxNativeAluInstructions = 0;
243   ctx->Const.VertexProgram.MaxNativeTexInstructions = 0;
244   ctx->Const.VertexProgram.MaxNativeTexIndirections = 0;
245   ctx->Const.VertexProgram.MaxNativeAttribs = 16;
246   ctx->Const.VertexProgram.MaxNativeTemps = 256;
247   ctx->Const.VertexProgram.MaxNativeAddressRegs = 1;
248   ctx->Const.VertexProgram.MaxNativeParameters = 1024;
249   ctx->Const.VertexProgram.MaxEnvParams =
250      MIN2(ctx->Const.VertexProgram.MaxNativeParameters,
251	   ctx->Const.VertexProgram.MaxEnvParams);
252
253   ctx->Const.FragmentProgram.MaxNativeInstructions = (16 * 1024);
254   ctx->Const.FragmentProgram.MaxNativeAluInstructions = (16 * 1024);
255   ctx->Const.FragmentProgram.MaxNativeTexInstructions = (16 * 1024);
256   ctx->Const.FragmentProgram.MaxNativeTexIndirections = (16 * 1024);
257   ctx->Const.FragmentProgram.MaxNativeAttribs = 12;
258   ctx->Const.FragmentProgram.MaxNativeTemps = 256;
259   ctx->Const.FragmentProgram.MaxNativeAddressRegs = 0;
260   ctx->Const.FragmentProgram.MaxNativeParameters = 1024;
261   ctx->Const.FragmentProgram.MaxEnvParams =
262      MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
263	   ctx->Const.FragmentProgram.MaxEnvParams);
264
265   /* Fragment shaders use real, 32-bit twos-complement integers for all
266    * integer types.
267    */
268   ctx->Const.FragmentProgram.LowInt.RangeMin = 31;
269   ctx->Const.FragmentProgram.LowInt.RangeMax = 30;
270   ctx->Const.FragmentProgram.LowInt.Precision = 0;
271   ctx->Const.FragmentProgram.HighInt = ctx->Const.FragmentProgram.MediumInt
272      = ctx->Const.FragmentProgram.LowInt;
273
274   /* Gen6 converts quads to polygon in beginning of 3D pipeline,
275      but we're not sure how it's actually done for vertex order,
276      that affect provoking vertex decision. Always use last vertex
277      convention for quad primitive which works as expected for now. */
278   if (intel->gen >= 6)
279       ctx->Const.QuadsFollowProvokingVertexConvention = false;
280
281   ctx->Const.QueryCounterBits.Timestamp = 36;
282
283   if (intel->is_g4x || intel->gen >= 5) {
284      brw->CMD_VF_STATISTICS = GM45_3DSTATE_VF_STATISTICS;
285      brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_GM45;
286      brw->has_surface_tile_offset = true;
287      if (intel->gen < 6)
288	  brw->has_compr4 = true;
289      brw->has_aa_line_parameters = true;
290      brw->has_pln = true;
291  } else {
292      brw->CMD_VF_STATISTICS = GEN4_3DSTATE_VF_STATISTICS;
293      brw->CMD_PIPELINE_SELECT = CMD_PIPELINE_SELECT_965;
294   }
295
296   /* WM maximum threads is number of EUs times number of threads per EU. */
297   if (intel->gen >= 7) {
298      if (intel->gt == 1) {
299	 brw->max_wm_threads = 48;
300	 brw->max_vs_threads = 36;
301	 brw->max_gs_threads = 36;
302	 brw->urb.size = 128;
303	 brw->urb.max_vs_entries = 512;
304	 brw->urb.max_gs_entries = 192;
305      } else if (intel->gt == 2) {
306	 brw->max_wm_threads = 172;
307	 brw->max_vs_threads = 128;
308	 brw->max_gs_threads = 128;
309	 brw->urb.size = 256;
310	 brw->urb.max_vs_entries = 704;
311	 brw->urb.max_gs_entries = 320;
312      } else {
313	 assert(!"Unknown gen7 device.");
314      }
315   } else if (intel->gen == 6) {
316      if (intel->gt == 2) {
317	 brw->max_wm_threads = 80;
318	 brw->max_vs_threads = 60;
319	 brw->max_gs_threads = 60;
320	 brw->urb.size = 64;            /* volume 5c.5 section 5.1 */
321	 brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
322	 brw->urb.max_gs_entries = 256;
323      } else {
324	 brw->max_wm_threads = 40;
325	 brw->max_vs_threads = 24;
326	 brw->max_gs_threads = 21; /* conservative; 24 if rendering disabled */
327	 brw->urb.size = 32;            /* volume 5c.5 section 5.1 */
328	 brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
329	 brw->urb.max_gs_entries = 256;
330      }
331      brw->urb.gen6_gs_previously_active = false;
332   } else if (intel->gen == 5) {
333      brw->urb.size = 1024;
334      brw->max_vs_threads = 72;
335      brw->max_gs_threads = 32;
336      brw->max_wm_threads = 12 * 6;
337   } else if (intel->is_g4x) {
338      brw->urb.size = 384;
339      brw->max_vs_threads = 32;
340      brw->max_gs_threads = 2;
341      brw->max_wm_threads = 10 * 5;
342   } else if (intel->gen < 6) {
343      brw->urb.size = 256;
344      brw->max_vs_threads = 16;
345      brw->max_gs_threads = 2;
346      brw->max_wm_threads = 8 * 4;
347      brw->has_negative_rhw_bug = true;
348   }
349
350   if (intel->gen <= 7) {
351      brw->needs_unlit_centroid_workaround = true;
352   }
353
354   brw->prim_restart.in_progress = false;
355   brw->prim_restart.enable_cut_index = false;
356   intel->hw_ctx = drm_intel_gem_context_create(intel->bufmgr);
357
358   brw_init_state( brw );
359
360   brw->curbe.last_buf = calloc(1, 4096);
361   brw->curbe.next_buf = calloc(1, 4096);
362
363   brw->state.dirty.mesa = ~0;
364   brw->state.dirty.brw = ~0;
365
366   brw->emit_state_always = 0;
367
368   intel->batch.need_workaround_flush = true;
369
370   ctx->VertexProgram._MaintainTnlProgram = true;
371   ctx->FragmentProgram._MaintainTexEnvProgram = true;
372
373   brw_draw_init( brw );
374
375   brw->precompile = driQueryOptionb(&intel->optionCache, "shader_precompile");
376
377   ctx->Const.NativeIntegers = true;
378   ctx->Const.UniformBooleanTrue = 1;
379
380   ctx->Const.ForceGLSLExtensionsWarn = driQueryOptionb(&intel->optionCache, "force_glsl_extensions_warn");
381
382   ctx->Const.ContextFlags = 0;
383   if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
384      ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
385
386   if ((flags & __DRI_CTX_FLAG_DEBUG) != 0)
387      ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
388
389   return true;
390}
391
392