/* * Copyright 2005 VMware, Inc. * All Rights Reserved. * * 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 VMWARE AND/OR ITS SUPPLIERS 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. */ #ifndef INTEL_BUFFEROBJ_H #define INTEL_BUFFEROBJ_H #include "main/mtypes.h" struct brw_context; struct gl_buffer_object; /** * Intel vertex/pixel buffer object, derived from Mesa's gl_buffer_object. */ struct intel_buffer_object { struct gl_buffer_object Base; drm_bacon_bo *buffer; /* the low-level buffer manager's buffer handle */ drm_bacon_bo *range_map_bo[MAP_COUNT]; /** * Alignment offset from the range_map_bo temporary mapping to the returned * obj->Pointer (caused by GL_ARB_map_buffer_alignment). */ unsigned map_extra[MAP_COUNT]; /** @{ * Tracking for what range of the BO may currently be in use by the GPU. * * Users often want to either glBufferSubData() or glMapBufferRange() a * buffer object where some subset of it is busy on the GPU, without either * stalling or doing an extra blit (since our blits are extra expensive, * given that we have to reupload most of the 3D state when switching * rings). We wish they'd just use glMapBufferRange() with the * UNSYNC|INVALIDATE_RANGE flag or the INVALIDATE_BUFFER flag, but lots * don't. * * To work around apps, we track what range of the BO we might have used on * the GPU as vertex data, tranform feedback output, buffer textures, etc., * and just do glBufferSubData() with an unsynchronized map when they're * outside of that range. * * If gpu_active_start > gpu_active_end, then the GPU is not currently * accessing the BO (and we can map it without synchronization). */ uint32_t gpu_active_start; uint32_t gpu_active_end; /** * If we've avoided stalls/blits using the active tracking, flag the buffer * for (occasional) stalling in the future to avoid getting stuck in a * cycle of blitting on buffer wraparound. */ bool prefer_stall_to_blit; /** @} */ }; /* Get the bm buffer associated with a GL bufferobject: */ drm_bacon_bo *intel_bufferobj_buffer(struct brw_context *brw, struct intel_buffer_object *obj, uint32_t offset, uint32_t size); void intel_upload_data(struct brw_context *brw, const void *data, uint32_t size, uint32_t alignment, drm_bacon_bo **out_bo, uint32_t *out_offset); void *intel_upload_space(struct brw_context *brw, uint32_t size, uint32_t alignment, drm_bacon_bo **out_bo, uint32_t *out_offset); void intel_upload_finish(struct brw_context *brw); /* Hook the bufferobject implementation into mesa: */ void intelInitBufferObjectFuncs(struct dd_function_table *functions); static inline struct intel_buffer_object * intel_buffer_object(struct gl_buffer_object *obj) { return (struct intel_buffer_object *) obj; } #endif