1 /* 2 * Copyright 2005 VMware, Inc. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial portions 15 * of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 #ifndef INTEL_BUFFEROBJ_H 27 #define INTEL_BUFFEROBJ_H 28 29 #include "main/mtypes.h" 30 31 struct brw_context; 32 struct gl_buffer_object; 33 34 35 /** 36 * Intel vertex/pixel buffer object, derived from Mesa's gl_buffer_object. 37 */ 38 struct intel_buffer_object 39 { 40 struct gl_buffer_object Base; 41 drm_intel_bo *buffer; /* the low-level buffer manager's buffer handle */ 42 43 drm_intel_bo *range_map_bo[MAP_COUNT]; 44 45 /** 46 * Alignment offset from the range_map_bo temporary mapping to the returned 47 * obj->Pointer (caused by GL_ARB_map_buffer_alignment). 48 */ 49 unsigned map_extra[MAP_COUNT]; 50 51 /** @{ 52 * Tracking for what range of the BO may currently be in use by the GPU. 53 * 54 * Users often want to either glBufferSubData() or glMapBufferRange() a 55 * buffer object where some subset of it is busy on the GPU, without either 56 * stalling or doing an extra blit (since our blits are extra expensive, 57 * given that we have to reupload most of the 3D state when switching 58 * rings). We wish they'd just use glMapBufferRange() with the 59 * UNSYNC|INVALIDATE_RANGE flag or the INVALIDATE_BUFFER flag, but lots 60 * don't. 61 * 62 * To work around apps, we track what range of the BO we might have used on 63 * the GPU as vertex data, tranform feedback output, buffer textures, etc., 64 * and just do glBufferSubData() with an unsynchronized map when they're 65 * outside of that range. 66 * 67 * If gpu_active_start > gpu_active_end, then the GPU is not currently 68 * accessing the BO (and we can map it without synchronization). 69 */ 70 uint32_t gpu_active_start; 71 uint32_t gpu_active_end; 72 73 /** 74 * If we've avoided stalls/blits using the active tracking, flag the buffer 75 * for (occasional) stalling in the future to avoid getting stuck in a 76 * cycle of blitting on buffer wraparound. 77 */ 78 bool prefer_stall_to_blit; 79 /** @} */ 80 }; 81 82 83 /* Get the bm buffer associated with a GL bufferobject: 84 */ 85 drm_intel_bo *intel_bufferobj_buffer(struct brw_context *brw, 86 struct intel_buffer_object *obj, 87 uint32_t offset, 88 uint32_t size); 89 90 void intel_upload_data(struct brw_context *brw, 91 const void *data, 92 uint32_t size, 93 uint32_t alignment, 94 drm_intel_bo **out_bo, 95 uint32_t *out_offset); 96 97 void *intel_upload_space(struct brw_context *brw, 98 uint32_t size, 99 uint32_t alignment, 100 drm_intel_bo **out_bo, 101 uint32_t *out_offset); 102 103 void intel_upload_finish(struct brw_context *brw); 104 105 /* Hook the bufferobject implementation into mesa: 106 */ 107 void intelInitBufferObjectFuncs(struct dd_function_table *functions); 108 109 static inline struct intel_buffer_object * 110 intel_buffer_object(struct gl_buffer_object *obj) 111 { 112 return (struct intel_buffer_object *) obj; 113 } 114 115 #endif 116
