1 /* 2 * Copyright 2012 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24 /** 25 * @file gen8_sol_state.c 26 * 27 * Controls the stream output logic (SOL) stage of the gen8 hardware, which is 28 * used to implement GL_EXT_transform_feedback. 29 */ 30 31 #include "brw_context.h" 32 #include "brw_state.h" 33 #include "brw_defines.h" 34 #include "intel_batchbuffer.h" 35 #include "intel_buffer_objects.h" 36 #include "main/transformfeedback.h" 37 38 void 39 gen8_upload_3dstate_so_buffers(struct brw_context *brw) 40 { 41 struct gl_context *ctx = &brw->ctx; 42 /* BRW_NEW_TRANSFORM_FEEDBACK */ 43 struct gl_transform_feedback_object *xfb_obj = 44 ctx->TransformFeedback.CurrentObject; 45 struct brw_transform_feedback_object *brw_obj = 46 (struct brw_transform_feedback_object *) xfb_obj; 47 uint32_t mocs_wb = brw->gen >= 9 ? SKL_MOCS_WB : BDW_MOCS_WB; 48 49 /* Set up the up to 4 output buffers. These are the ranges defined in the 50 * gl_transform_feedback_object. 51 */ 52 for (int i = 0; i < 4; i++) { 53 struct intel_buffer_object *bufferobj = 54 intel_buffer_object(xfb_obj->Buffers[i]); 55 56 if (!bufferobj) { 57 BEGIN_BATCH(8); 58 OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (8 - 2)); 59 OUT_BATCH((i << SO_BUFFER_INDEX_SHIFT)); 60 OUT_BATCH(0); 61 OUT_BATCH(0); 62 OUT_BATCH(0); 63 OUT_BATCH(0); 64 OUT_BATCH(0); 65 OUT_BATCH(0); 66 ADVANCE_BATCH(); 67 continue; 68 } 69 70 uint32_t start = xfb_obj->Offset[i]; 71 assert(start % 4 == 0); 72 uint32_t end = ALIGN(start + xfb_obj->Size[i], 4); 73 drm_intel_bo *bo = 74 intel_bufferobj_buffer(brw, bufferobj, start, end - start); 75 assert(end <= bo->size); 76 77 BEGIN_BATCH(8); 78 OUT_BATCH(_3DSTATE_SO_BUFFER << 16 | (8 - 2)); 79 OUT_BATCH(GEN8_SO_BUFFER_ENABLE | (i << SO_BUFFER_INDEX_SHIFT) | 80 GEN8_SO_BUFFER_OFFSET_WRITE_ENABLE | 81 GEN8_SO_BUFFER_OFFSET_ADDRESS_ENABLE | 82 (mocs_wb << 22)); 83 OUT_RELOC64(bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, start); 84 OUT_BATCH(xfb_obj->Size[i] / 4 - 1); 85 OUT_RELOC64(brw_obj->offset_bo, 86 I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, 87 i * sizeof(uint32_t)); 88 if (brw_obj->zero_offsets) 89 OUT_BATCH(0); /* Zero out the offset and write that to offset_bo */ 90 else 91 OUT_BATCH(0xFFFFFFFF); /* Use offset_bo as the "Stream Offset." */ 92 ADVANCE_BATCH(); 93 } 94 brw_obj->zero_offsets = false; 95 } 96
