/* * 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. */ /** * @file gen8_sol_state.c * * Controls the stream output logic (SOL) stage of the gen8 hardware, which is * used to implement GL_EXT_transform_feedback. */ #include "brw_context.h" #include "brw_state.h" #include "brw_defines.h" #include "intel_batchbuffer.h" #include "intel_buffer_objects.h" #include "main/transformfeedback.h" static void gen8_upload_3dstate_so_buffers(struct brw_context *brw) { struct gl_context *ctx = &brw->ctx; /* BRW_NEW_TRANSFORM_FEEDBACK */ struct gl_transform_feedback_object *xfb_obj = ctx->TransformFeedback.CurrentObject; struct brw_transform_feedback_object *brw_obj = (struct brw_transform_feedback_object *) xfb_obj; /* Set up the up to 4 output buffers. These are the ranges defined in the * gl_transform_feedback_object. */ for (int i = 0; i < 4; i++) { struct intel_buffer_object *bufferobj = intel_buffer_object(xfb_obj->Buffers[i]); if (!bufferobj) { BEGIN_BATCH(8); OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (8 - 2)); OUT_BATCH((i << SO_BUFFER_INDEX_SHIFT)); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); OUT_BATCH(0); ADVANCE_BATCH(); continue; } uint32_t start = xfb_obj->Offset[i]; assert(start % 4 == 0); uint32_t end = ALIGN(start + xfb_obj->Size[i], 4); drm_intel_bo *bo = intel_bufferobj_buffer(brw, bufferobj, start, end - start); assert(end <= bo->size); perf_debug("Missing MOCS setup for 3DSTATE_SO_BUFFER."); BEGIN_BATCH(8); OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (8 - 2)); OUT_BATCH(GEN8_SO_BUFFER_ENABLE | (i << SO_BUFFER_INDEX_SHIFT) | GEN8_SO_BUFFER_OFFSET_WRITE_ENABLE | GEN8_SO_BUFFER_OFFSET_ADDRESS_ENABLE); OUT_RELOC64(bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, start); OUT_BATCH(xfb_obj->Size[i] / 4 - 1); OUT_RELOC64(brw_obj->offset_bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, i * sizeof(uint32_t)); if (brw_obj->zero_offsets) OUT_BATCH(0); /* Zero out the offset and write that to offset_bo */ else OUT_BATCH(0xFFFFFFFF); /* Use offset_bo as the "Stream Offset." */ ADVANCE_BATCH(); } brw_obj->zero_offsets = false; } static void gen8_upload_3dstate_streamout(struct brw_context *brw, bool active, struct brw_vue_map *vue_map) { struct gl_context *ctx = &brw->ctx; /* BRW_NEW_VERTEX_PROGRAM */ const struct gl_shader_program *vs_prog = ctx->Shader.CurrentProgram[MESA_SHADER_VERTEX]; /* BRW_NEW_TRANSFORM_FEEDBACK */ const struct gl_transform_feedback_info *linked_xfb_info = &vs_prog->LinkedTransformFeedback; struct gl_transform_feedback_object *xfb_obj = ctx->TransformFeedback.CurrentObject; uint32_t dw1 = 0, dw2 = 0, dw3 = 0, dw4 = 0; if (active) { int urb_entry_read_offset = 0; int urb_entry_read_length = (vue_map->num_slots + 1) / 2 - urb_entry_read_offset; dw1 |= SO_FUNCTION_ENABLE; dw1 |= SO_STATISTICS_ENABLE; /* _NEW_LIGHT */ if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) dw1 |= SO_REORDER_TRAILING; /* We always read the whole vertex. This could be reduced at some * point by reading less and offsetting the register index in the * SO_DECLs. */ dw2 |= urb_entry_read_offset << SO_STREAM_0_VERTEX_READ_OFFSET_SHIFT; dw2 |= (urb_entry_read_length - 1) << SO_STREAM_0_VERTEX_READ_LENGTH_SHIFT; /* Set buffer pitches; 0 means unbound. */ if (xfb_obj->Buffers[0]) dw3 |= linked_xfb_info->BufferStride[0] * 4; if (xfb_obj->Buffers[1]) dw3 |= (linked_xfb_info->BufferStride[1] * 4) << 16; if (xfb_obj->Buffers[2]) dw4 |= linked_xfb_info->BufferStride[2] * 4; if (xfb_obj->Buffers[3]) dw4 |= (linked_xfb_info->BufferStride[3] * 4) << 16; } BEGIN_BATCH(5); OUT_BATCH(_3DSTATE_STREAMOUT << 16 | (5 - 2)); OUT_BATCH(dw1); OUT_BATCH(dw2); OUT_BATCH(dw3); OUT_BATCH(dw4); ADVANCE_BATCH(); } static void upload_sol_state(struct brw_context *brw) { struct gl_context *ctx = &brw->ctx; /* BRW_NEW_TRANSFORM_FEEDBACK */ bool active = _mesa_is_xfb_active_and_unpaused(ctx); if (active) { gen8_upload_3dstate_so_buffers(brw); /* BRW_NEW_VUE_MAP_GEOM_OUT */ gen7_upload_3dstate_so_decl_list(brw, &brw->vue_map_geom_out); } gen8_upload_3dstate_streamout(brw, active, &brw->vue_map_geom_out); } const struct brw_tracked_state gen8_sol_state = { .dirty = { .mesa = _NEW_LIGHT, .brw = BRW_NEW_BATCH | BRW_NEW_RASTERIZER_DISCARD | BRW_NEW_TRANSFORM_FEEDBACK | BRW_NEW_VERTEX_PROGRAM | BRW_NEW_VUE_MAP_GEOM_OUT, .cache = 0, }, .emit = upload_sol_state, };