/* * Copyright © 2012 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 #include "program/program.h" #include "brw_state.h" #include "brw_defines.h" #include "brw_wm.h" #include "intel_batchbuffer.h" void gen8_upload_ps_extra(struct brw_context *brw, const struct brw_wm_prog_data *prog_data) { uint32_t dw1 = 0; dw1 |= GEN8_PSX_PIXEL_SHADER_VALID; dw1 |= prog_data->computed_depth_mode << GEN8_PSX_COMPUTED_DEPTH_MODE_SHIFT; if (prog_data->uses_kill) dw1 |= GEN8_PSX_KILL_ENABLE; if (prog_data->num_varying_inputs != 0) dw1 |= GEN8_PSX_ATTRIBUTE_ENABLE; if (prog_data->uses_src_depth) dw1 |= GEN8_PSX_USES_SOURCE_DEPTH; if (prog_data->uses_src_w) dw1 |= GEN8_PSX_USES_SOURCE_W; if (prog_data->persample_dispatch) dw1 |= GEN8_PSX_SHADER_IS_PER_SAMPLE; if (prog_data->uses_sample_mask) { if (brw->gen >= 9) dw1 |= BRW_PSICMS_INNER << GEN9_PSX_SHADER_NORMAL_COVERAGE_MASK_SHIFT; else dw1 |= GEN8_PSX_SHADER_USES_INPUT_COVERAGE_MASK; } if (prog_data->uses_omask) dw1 |= GEN8_PSX_OMASK_TO_RENDER_TARGET; if (brw->gen >= 9 && prog_data->pulls_bary) dw1 |= GEN9_PSX_SHADER_PULLS_BARY; /* The stricter cross-primitive coherency guarantees that the hardware * gives us with the "Accesses UAV" bit set for at least one shader stage * and the "UAV coherency required" bit set on the 3DPRIMITIVE command are * redundant within the current image, atomic counter and SSBO GL APIs, * which all have very loose ordering and coherency requirements and * generally rely on the application to insert explicit barriers when a * shader invocation is expected to see the memory writes performed by the * invocations of some previous primitive. Regardless of the value of "UAV * coherency required", the "Accesses UAV" bits will implicitly cause an in * most cases useless DC flush when the lowermost stage with the bit set * finishes execution. * * It would be nice to disable it, but in some cases we can't because on * Gen8+ it also has an influence on rasterization via the PS UAV-only * signal (which could be set independently from the coherency mechanism in * the 3DSTATE_WM command on Gen7), and because in some cases it will * determine whether the hardware skips execution of the fragment shader or * not via the ThreadDispatchEnable signal. However if we know that * GEN8_PS_BLEND_HAS_WRITEABLE_RT is going to be set and * GEN8_PSX_PIXEL_SHADER_NO_RT_WRITE is not set it shouldn't make any * difference so we may just disable it here. * * Gen8 hardware tries to compute ThreadDispatchEnable for us but doesn't * take into account KillPixels when no depth or stencil writes are enabled. * In order for occlusion queries to work correctly with no attachments, we * need to force-enable here. * * BRW_NEW_FS_PROG_DATA | BRW_NEW_FRAGMENT_PROGRAM | _NEW_BUFFERS | _NEW_COLOR */ if ((prog_data->has_side_effects || prog_data->uses_kill) && !brw_color_buffer_write_enabled(brw)) dw1 |= GEN8_PSX_SHADER_HAS_UAV; if (prog_data->computed_stencil) { assert(brw->gen >= 9); dw1 |= GEN9_PSX_SHADER_COMPUTES_STENCIL; } BEGIN_BATCH(2); OUT_BATCH(_3DSTATE_PS_EXTRA << 16 | (2 - 2)); OUT_BATCH(dw1); ADVANCE_BATCH(); } static void upload_ps_extra(struct brw_context *brw) { /* BRW_NEW_FS_PROG_DATA */ gen8_upload_ps_extra(brw, brw_wm_prog_data(brw->wm.base.prog_data)); } const struct brw_tracked_state gen8_ps_extra = { .dirty = { .mesa = _NEW_BUFFERS | _NEW_COLOR, .brw = BRW_NEW_BLORP | BRW_NEW_CONTEXT | BRW_NEW_FRAGMENT_PROGRAM | BRW_NEW_FS_PROG_DATA, }, .emit = upload_ps_extra, }; static void upload_wm_state(struct brw_context *brw) { struct gl_context *ctx = &brw->ctx; uint32_t dw1 = 0; /* BRW_NEW_FS_PROG_DATA */ const struct brw_wm_prog_data *wm_prog_data = brw_wm_prog_data(brw->wm.base.prog_data); dw1 |= GEN7_WM_STATISTICS_ENABLE; dw1 |= GEN7_WM_LINE_AA_WIDTH_1_0; dw1 |= GEN7_WM_LINE_END_CAP_AA_WIDTH_0_5; dw1 |= GEN7_WM_POINT_RASTRULE_UPPER_RIGHT; /* _NEW_LINE */ if (ctx->Line.StippleFlag) dw1 |= GEN7_WM_LINE_STIPPLE_ENABLE; /* _NEW_POLYGON */ if (ctx->Polygon.StippleFlag) dw1 |= GEN7_WM_POLYGON_STIPPLE_ENABLE; dw1 |= wm_prog_data->barycentric_interp_modes << GEN7_WM_BARYCENTRIC_INTERPOLATION_MODE_SHIFT; /* BRW_NEW_FS_PROG_DATA */ if (wm_prog_data->early_fragment_tests) dw1 |= GEN7_WM_EARLY_DS_CONTROL_PREPS; else if (wm_prog_data->has_side_effects) dw1 |= GEN7_WM_EARLY_DS_CONTROL_PSEXEC; BEGIN_BATCH(2); OUT_BATCH(_3DSTATE_WM << 16 | (2 - 2)); OUT_BATCH(dw1); ADVANCE_BATCH(); } const struct brw_tracked_state gen8_wm_state = { .dirty = { .mesa = _NEW_LINE | _NEW_POLYGON, .brw = BRW_NEW_BLORP | BRW_NEW_CONTEXT | BRW_NEW_FS_PROG_DATA, }, .emit = upload_wm_state, }; void gen8_upload_ps_state(struct brw_context *brw, const struct brw_stage_state *stage_state, const struct brw_wm_prog_data *prog_data, uint32_t fast_clear_op) { uint32_t dw3 = 0, dw6 = 0, dw7 = 0, ksp0, ksp2 = 0; /* Initialize the execution mask with VMask. Otherwise, derivatives are * incorrect for subspans where some of the pixels are unlit. We believe * the bit just didn't take effect in previous generations. */ dw3 |= GEN7_PS_VECTOR_MASK_ENABLE; const unsigned sampler_count = DIV_ROUND_UP(CLAMP(stage_state->sampler_count, 0, 16), 4); dw3 |= SET_FIELD(sampler_count, GEN7_PS_SAMPLER_COUNT); /* BRW_NEW_FS_PROG_DATA */ dw3 |= ((prog_data->base.binding_table.size_bytes / 4) << GEN7_PS_BINDING_TABLE_ENTRY_COUNT_SHIFT); if (prog_data->base.use_alt_mode) dw3 |= GEN7_PS_FLOATING_POINT_MODE_ALT; /* 3DSTATE_PS expects the number of threads per PSD, which is always 64; * it implicitly scales for different GT levels (which have some # of PSDs). * * In Gen8 the format is U8-2 whereas in Gen9 it is U8-1. */ if (brw->gen >= 9) dw6 |= (64 - 1) << HSW_PS_MAX_THREADS_SHIFT; else dw6 |= (64 - 2) << HSW_PS_MAX_THREADS_SHIFT; if (prog_data->base.nr_params > 0) dw6 |= GEN7_PS_PUSH_CONSTANT_ENABLE; /* From the documentation for this packet: * "If the PS kernel does not need the Position XY Offsets to * compute a Position Value, then this field should be programmed * to POSOFFSET_NONE." * * "SW Recommendation: If the PS kernel needs the Position Offsets * to compute a Position XY value, this field should match Position * ZW Interpolation Mode to ensure a consistent position.xyzw * computation." * * We only require XY sample offsets. So, this recommendation doesn't * look useful at the moment. We might need this in future. */ if (prog_data->uses_pos_offset) dw6 |= GEN7_PS_POSOFFSET_SAMPLE; else dw6 |= GEN7_PS_POSOFFSET_NONE; dw6 |= fast_clear_op; if (prog_data->dispatch_8) dw6 |= GEN7_PS_8_DISPATCH_ENABLE; if (prog_data->dispatch_16) dw6 |= GEN7_PS_16_DISPATCH_ENABLE; dw7 |= prog_data->base.dispatch_grf_start_reg << GEN7_PS_DISPATCH_START_GRF_SHIFT_0; dw7 |= prog_data->dispatch_grf_start_reg_2 << GEN7_PS_DISPATCH_START_GRF_SHIFT_2; ksp0 = stage_state->prog_offset; ksp2 = stage_state->prog_offset + prog_data->prog_offset_2; BEGIN_BATCH(12); OUT_BATCH(_3DSTATE_PS << 16 | (12 - 2)); OUT_BATCH(ksp0); OUT_BATCH(0); OUT_BATCH(dw3); if (prog_data->base.total_scratch) { OUT_RELOC64(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(0); } OUT_BATCH(dw6); OUT_BATCH(dw7); OUT_BATCH(0); /* kernel 1 pointer */ OUT_BATCH(0); OUT_BATCH(ksp2); OUT_BATCH(0); ADVANCE_BATCH(); } static void upload_ps_state(struct brw_context *brw) { /* BRW_NEW_FS_PROG_DATA */ const struct brw_wm_prog_data *prog_data = brw_wm_prog_data(brw->wm.base.prog_data); gen8_upload_ps_state(brw, &brw->wm.base, prog_data, brw->wm.fast_clear_op); } const struct brw_tracked_state gen8_ps_state = { .dirty = { .mesa = _NEW_MULTISAMPLE, .brw = BRW_NEW_BATCH | BRW_NEW_BLORP | BRW_NEW_FS_PROG_DATA, }, .emit = upload_ps_state, };