/* * Copyright © 2009 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Eric Anholt * */ #include "brw_context.h" #include "brw_state.h" #include "brw_defines.h" #include "brw_util.h" #include "program/prog_parameter.h" #include "program/prog_statevars.h" #include "intel_batchbuffer.h" static void gen6_upload_vs_push_constants(struct brw_context *brw) { struct intel_context *intel = &brw->intel; struct gl_context *ctx = &intel->ctx; /* _BRW_NEW_VERTEX_PROGRAM */ const struct brw_vertex_program *vp = brw_vertex_program_const(brw->vertex_program); unsigned int nr_params = brw->vs.prog_data->nr_params / 4; /* Updates the ParamaterValues[i] pointers for all parameters of the * basic type of PROGRAM_STATE_VAR. */ /* XXX: Should this happen somewhere before to get our state flag set? */ _mesa_load_state_parameters(ctx, vp->program.Base.Parameters); /* CACHE_NEW_VS_PROG | _NEW_TRANSFORM */ if (brw->vs.prog_data->nr_params == 0 && !ctx->Transform.ClipPlanesEnabled) { brw->vs.push_const_size = 0; } else { int params_uploaded = 0; float *param; int i; param = brw_state_batch(brw, AUB_TRACE_VS_CONSTANTS, (MAX_CLIP_PLANES + nr_params) * 4 * sizeof(float), 32, &brw->vs.push_const_offset); for (i = 0; i < brw->vs.prog_data->nr_params; i++) { param[i] = *brw->vs.prog_data->param[i]; } params_uploaded += brw->vs.prog_data->nr_params / 4; if (0) { printf("VS constant buffer:\n"); for (i = 0; i < params_uploaded; i++) { float *buf = param + i * 4; printf("%d: %f %f %f %f\n", i, buf[0], buf[1], buf[2], buf[3]); } } brw->vs.push_const_size = (params_uploaded + 1) / 2; /* We can only push 32 registers of constants at a time. */ assert(brw->vs.push_const_size <= 32); } } const struct brw_tracked_state gen6_vs_push_constants = { .dirty = { .mesa = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS, .brw = (BRW_NEW_BATCH | BRW_NEW_VERTEX_PROGRAM), .cache = CACHE_NEW_VS_PROG, }, .emit = gen6_upload_vs_push_constants, }; static void upload_vs_state(struct brw_context *brw) { struct intel_context *intel = &brw->intel; uint32_t floating_point_mode = 0; /* From the BSpec, Volume 2a, Part 3 "Vertex Shader", Section * 3DSTATE_VS, Dword 5.0 "VS Function Enable": * [DevSNB] A pipeline flush must be programmed prior to a 3DSTATE_VS * command that causes the VS Function Enable to toggle. Pipeline * flush can be executed by sending a PIPE_CONTROL command with CS * stall bit set and a post sync operation. */ intel_emit_post_sync_nonzero_flush(intel); if (brw->vs.push_const_size == 0) { /* Disable the push constant buffers. */ BEGIN_BATCH(5); OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (5 - 2)); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); ADVANCE_BATCH(); } else { BEGIN_BATCH(5); OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | GEN6_CONSTANT_BUFFER_0_ENABLE | (5 - 2)); /* Pointer to the VS constant buffer. Covered by the set of * state flags from gen6_upload_vs_constants */ OUT_BATCH(brw->vs.push_const_offset + brw->vs.push_const_size - 1); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); ADVANCE_BATCH(); } /* Use ALT floating point mode for ARB vertex programs, because they * require 0^0 == 1. */ if (intel->ctx.Shader.CurrentVertexProgram == NULL) floating_point_mode = GEN6_VS_FLOATING_POINT_MODE_ALT; BEGIN_BATCH(6); OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2)); OUT_BATCH(brw->vs.prog_offset); OUT_BATCH(floating_point_mode | ((ALIGN(brw->sampler.count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT)); if (brw->vs.prog_data->total_scratch) { OUT_RELOC(brw->vs.scratch_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, ffs(brw->vs.prog_data->total_scratch) - 11); } else { OUT_BATCH(0); } OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) | (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) | (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT)); OUT_BATCH(((brw->max_vs_threads - 1) << GEN6_VS_MAX_THREADS_SHIFT) | GEN6_VS_STATISTICS_ENABLE | GEN6_VS_ENABLE); ADVANCE_BATCH(); /* Based on my reading of the simulator, the VS constants don't get * pulled into the VS FF unit until an appropriate pipeline flush * happens, and instead the 3DSTATE_CONSTANT_VS packet just adds * references to them into a little FIFO. The flushes are common, * but don't reliably happen between this and a 3DPRIMITIVE, causing * the primitive to use the wrong constants. Then the FIFO * containing the constant setup gets added to again on the next * constants change, and eventually when a flush does happen the * unit is overwhelmed by constant changes and dies. * * To avoid this, send a PIPE_CONTROL down the line that will * update the unit immediately loading the constants. The flush * type bits here were those set by the STATE_BASE_ADDRESS whose * move in a82a43e8d99e1715dd11c9c091b5ab734079b6a6 triggered the * bug reports that led to this workaround, and may be more than * what is strictly required to avoid the issue. */ intel_emit_post_sync_nonzero_flush(intel); BEGIN_BATCH(4); OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); OUT_BATCH(PIPE_CONTROL_DEPTH_STALL | PIPE_CONTROL_INSTRUCTION_FLUSH | PIPE_CONTROL_STATE_CACHE_INVALIDATE); OUT_BATCH(0); /* address */ OUT_BATCH(0); /* write data */ ADVANCE_BATCH(); } const struct brw_tracked_state gen6_vs_state = { .dirty = { .mesa = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS, .brw = (BRW_NEW_CONTEXT | BRW_NEW_VERTEX_PROGRAM | BRW_NEW_BATCH), .cache = CACHE_NEW_VS_PROG | CACHE_NEW_SAMPLER }, .emit = upload_vs_state, };