| /* |
| * 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 gen_device_info *devinfo = &brw->screen->devinfo; |
| 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_stage_prog_data *prog_data = stage_state->prog_data; |
| const struct brw_vue_prog_data *vue_prog_data = |
| brw_vue_prog_data(stage_state->prog_data); |
| const struct brw_gs_prog_data *gs_prog_data = |
| brw_gs_prog_data(stage_state->prog_data); |
| |
| /** |
| * 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) | |
| ((prog_data->binding_table.size_bytes / 4) << |
| GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT)); |
| |
| if (prog_data->total_scratch) { |
| OUT_RELOC(stage_state->scratch_bo, |
| I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, |
| ffs(stage_state->per_thread_scratch) - 11); |
| } else { |
| OUT_BATCH(0); |
| } |
| |
| uint32_t dw4 = |
| ((gs_prog_data->output_vertex_size_hwords * 2 - 1) << |
| GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) | |
| (gs_prog_data->output_topology << GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) | |
| (vue_prog_data->urb_read_length << |
| GEN6_GS_URB_READ_LENGTH_SHIFT) | |
| (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) | |
| (prog_data->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 = |
| ((devinfo->max_gs_threads - 1) << max_threads_shift) | |
| (gs_prog_data->control_data_header_size_hwords << |
| GEN7_GS_CONTROL_DATA_HEADER_SIZE_SHIFT) | |
| ((gs_prog_data->invocations - 1) << |
| GEN7_GS_INSTANCE_CONTROL_SHIFT) | |
| SET_FIELD(vue_prog_data->dispatch_mode, GEN7_GS_DISPATCH_MODE) | |
| GEN6_GS_STATISTICS_ENABLE | |
| (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 |= gs_prog_data->control_data_format << |
| HSW_GS_CONTROL_DATA_FORMAT_SHIFT; |
| } else { |
| dw5 |= 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_BLORP | |
| BRW_NEW_CONTEXT | |
| BRW_NEW_GEOMETRY_PROGRAM | |
| BRW_NEW_GS_PROG_DATA, |
| }, |
| .emit = upload_gs_state, |
| }; |
