| /* |
| * 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 <eric@anholt.net> |
| * |
| */ |
| |
| #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 "main/shaderapi.h" |
| #include "intel_batchbuffer.h" |
| |
| static void |
| gen6_upload_vs_push_constants(struct brw_context *brw) |
| { |
| struct brw_stage_state *stage_state = &brw->vs.base; |
| |
| /* _BRW_NEW_VERTEX_PROGRAM */ |
| const struct brw_program *vp = brw_program_const(brw->vertex_program); |
| /* BRW_NEW_VS_PROG_DATA */ |
| const struct brw_stage_prog_data *prog_data = brw->vs.base.prog_data; |
| |
| _mesa_shader_write_subroutine_indices(&brw->ctx, MESA_SHADER_VERTEX); |
| gen6_upload_push_constants(brw, &vp->program, prog_data, stage_state, |
| AUB_TRACE_VS_CONSTANTS); |
| |
| if (brw->gen >= 7) { |
| if (brw->gen == 7 && !brw->is_haswell && !brw->is_baytrail) |
| gen7_emit_vs_workaround_flush(brw); |
| |
| gen7_upload_constant_state(brw, stage_state, true /* active */, |
| _3DSTATE_CONSTANT_VS); |
| } |
| } |
| |
| const struct brw_tracked_state gen6_vs_push_constants = { |
| .dirty = { |
| .mesa = _NEW_PROGRAM_CONSTANTS | |
| _NEW_TRANSFORM, |
| .brw = BRW_NEW_BATCH | |
| BRW_NEW_BLORP | |
| BRW_NEW_PUSH_CONSTANT_ALLOCATION | |
| BRW_NEW_VERTEX_PROGRAM | |
| BRW_NEW_VS_PROG_DATA, |
| }, |
| .emit = gen6_upload_vs_push_constants, |
| }; |
| |
| static void |
| upload_vs_state(struct brw_context *brw) |
| { |
| const struct gen_device_info *devinfo = &brw->screen->devinfo; |
| const struct brw_stage_state *stage_state = &brw->vs.base; |
| 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); |
| uint32_t floating_point_mode = 0; |
| |
| /* From the BSpec, 3D Pipeline > Geometry > Vertex Shader > State, |
| * 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. |
| * |
| * We've already done such a flush at the start of state upload, so we |
| * don't need to do another one here. |
| */ |
| |
| if (stage_state->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(stage_state->push_const_offset + |
| stage_state->push_const_size - 1); |
| OUT_BATCH(0); |
| OUT_BATCH(0); |
| OUT_BATCH(0); |
| ADVANCE_BATCH(); |
| } |
| |
| if (prog_data->use_alt_mode) |
| floating_point_mode = GEN6_VS_FLOATING_POINT_MODE_ALT; |
| |
| BEGIN_BATCH(6); |
| OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2)); |
| OUT_BATCH(stage_state->prog_offset); |
| OUT_BATCH(floating_point_mode | |
| ((ALIGN(stage_state->sampler_count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT) | |
| ((prog_data->binding_table.size_bytes / 4) << |
| GEN6_VS_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); |
| } |
| |
| OUT_BATCH((prog_data->dispatch_grf_start_reg << |
| GEN6_VS_DISPATCH_START_GRF_SHIFT) | |
| (vue_prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) | |
| (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT)); |
| |
| OUT_BATCH(((devinfo->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. |
| */ |
| brw_emit_pipe_control_flush(brw, |
| PIPE_CONTROL_DEPTH_STALL | |
| PIPE_CONTROL_INSTRUCTION_INVALIDATE | |
| PIPE_CONTROL_STATE_CACHE_INVALIDATE); |
| } |
| |
| const struct brw_tracked_state gen6_vs_state = { |
| .dirty = { |
| .mesa = _NEW_PROGRAM_CONSTANTS | |
| _NEW_TRANSFORM, |
| .brw = BRW_NEW_BATCH | |
| BRW_NEW_BLORP | |
| BRW_NEW_CONTEXT | |
| BRW_NEW_PUSH_CONSTANT_ALLOCATION | |
| BRW_NEW_VERTEX_PROGRAM | |
| BRW_NEW_VS_PROG_DATA, |
| }, |
| .emit = upload_vs_state, |
| }; |
