/* * Copyright © 2013 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. */ #include "brw_context.h" #include "brw_state.h" #include "brw_defines.h" #include "intel_batchbuffer.h" static void upload_gs_state(struct brw_context *brw) { const struct brw_stage_state *stage_state = &brw->gs.base; const int max_threads_shift = brw->is_haswell ? HSW_GS_MAX_THREADS_SHIFT : GEN6_GS_MAX_THREADS_SHIFT; /* BRW_NEW_GEOMETRY_PROGRAM */ bool active = brw->geometry_program; /* BRW_NEW_GS_PROG_DATA */ const struct brw_vue_prog_data *prog_data = &brw->gs.prog_data->base; /** * From Graphics BSpec: 3D-Media-GPGPU Engine > 3D Pipeline Stages > * Geometry > Geometry Shader > State: * * "Note: Because of corruption in IVB:GT2, software needs to flush the * whole fixed function pipeline when the GS enable changes value in * the 3DSTATE_GS." * * The hardware architects have clarified that in this context "flush the * whole fixed function pipeline" means to emit a PIPE_CONTROL with the "CS * Stall" bit set. */ if (!brw->is_haswell && brw->gt == 2 && brw->gs.enabled != active) gen7_emit_cs_stall_flush(brw); if (active) { BEGIN_BATCH(7); OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2)); OUT_BATCH(stage_state->prog_offset); OUT_BATCH(((ALIGN(stage_state->sampler_count, 4)/4) << GEN6_GS_SAMPLER_COUNT_SHIFT) | ((brw->gs.prog_data->base.base.binding_table.size_bytes / 4) << GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT)); if (brw->gs.prog_data->base.base.total_scratch) { OUT_RELOC(stage_state->scratch_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, ffs(brw->gs.prog_data->base.base.total_scratch) - 11); } else { OUT_BATCH(0); } uint32_t dw4 = ((brw->gs.prog_data->output_vertex_size_hwords * 2 - 1) << GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) | (brw->gs.prog_data->output_topology << GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) | (prog_data->urb_read_length << GEN6_GS_URB_READ_LENGTH_SHIFT) | (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) | (prog_data->base.dispatch_grf_start_reg << GEN6_GS_DISPATCH_START_GRF_SHIFT); /* Note: the meaning of the GEN7_GS_REORDER_TRAILING bit changes between * Ivy Bridge and Haswell. * * On Ivy Bridge, setting this bit causes the vertices of a triangle * strip to be delivered to the geometry shader in an order that does * not strictly follow the OpenGL spec, but preserves triangle * orientation. For example, if the vertices are (1, 2, 3, 4, 5), then * the geometry shader sees triangles: * * (1, 2, 3), (2, 4, 3), (3, 4, 5) * * (Clearing the bit is even worse, because it fails to preserve * orientation). * * Triangle strips with adjacency always ordered in a way that preserves * triangle orientation but does not strictly follow the OpenGL spec, * regardless of the setting of this bit. * * On Haswell, both triangle strips and triangle strips with adjacency * are always ordered in a way that preserves triangle orientation. * Setting this bit causes the ordering to strictly follow the OpenGL * spec. * * So in either case we want to set the bit. Unfortunately on Ivy * Bridge this will get the order close to correct but not perfect. */ uint32_t dw5 = ((brw->max_gs_threads - 1) << max_threads_shift) | (brw->gs.prog_data->control_data_header_size_hwords << GEN7_GS_CONTROL_DATA_HEADER_SIZE_SHIFT) | ((brw->gs.prog_data->invocations - 1) << GEN7_GS_INSTANCE_CONTROL_SHIFT) | brw->gs.prog_data->dispatch_mode | GEN6_GS_STATISTICS_ENABLE | (brw->gs.prog_data->include_primitive_id ? GEN7_GS_INCLUDE_PRIMITIVE_ID : 0) | GEN7_GS_REORDER_TRAILING | GEN7_GS_ENABLE; uint32_t dw6 = 0; if (brw->is_haswell) { dw6 |= brw->gs.prog_data->control_data_format << HSW_GS_CONTROL_DATA_FORMAT_SHIFT; } else { dw5 |= brw->gs.prog_data->control_data_format << IVB_GS_CONTROL_DATA_FORMAT_SHIFT; } OUT_BATCH(dw4); OUT_BATCH(dw5); OUT_BATCH(dw6); ADVANCE_BATCH(); } else { BEGIN_BATCH(7); OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2)); OUT_BATCH(0); /* prog_bo */ OUT_BATCH((0 << GEN6_GS_SAMPLER_COUNT_SHIFT) | (0 << GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT)); OUT_BATCH(0); /* scratch space base offset */ OUT_BATCH((1 << GEN6_GS_DISPATCH_START_GRF_SHIFT) | (0 << GEN6_GS_URB_READ_LENGTH_SHIFT) | GEN7_GS_INCLUDE_VERTEX_HANDLES | (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT)); OUT_BATCH((0 << GEN6_GS_MAX_THREADS_SHIFT) | GEN6_GS_STATISTICS_ENABLE); OUT_BATCH(0); ADVANCE_BATCH(); } brw->gs.enabled = active; } const struct brw_tracked_state gen7_gs_state = { .dirty = { .mesa = _NEW_TRANSFORM, .brw = BRW_NEW_BATCH | BRW_NEW_CONTEXT | BRW_NEW_GEOMETRY_PROGRAM | BRW_NEW_GS_PROG_DATA, }, .emit = upload_gs_state, };