/************************************************************************** * * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * 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, sub license, 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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. * **************************************************************************/ #include "main/imports.h" #include "main/mtypes.h" #include "main/bufferobj.h" #include "intel_context.h" #include "intel_buffer_objects.h" #include "intel_batchbuffer.h" #include "intel_regions.h" /** Allocates a new dri_bo to store the data for the buffer object. */ static void intel_bufferobj_alloc_buffer(struct intel_context *intel, struct intel_buffer_object *intel_obj) { intel_obj->buffer = dri_bo_alloc(intel->bufmgr, "bufferobj", intel_obj->Base.Size, 64); } /** * There is some duplication between mesa's bufferobjects and our * bufmgr buffers. Both have an integer handle and a hashtable to * lookup an opaque structure. It would be nice if the handles and * internal structure where somehow shared. */ static struct gl_buffer_object * intel_bufferobj_alloc(GLcontext * ctx, GLuint name, GLenum target) { struct intel_buffer_object *obj = CALLOC_STRUCT(intel_buffer_object); _mesa_initialize_buffer_object(&obj->Base, name, target); obj->buffer = NULL; return &obj->Base; } /* Break the COW tie to the region. The region gets to keep the data. */ void intel_bufferobj_release_region(struct intel_context *intel, struct intel_buffer_object *intel_obj) { assert(intel_obj->region->buffer == intel_obj->buffer); intel_obj->region->pbo = NULL; intel_obj->region = NULL; dri_bo_unreference(intel_obj->buffer); intel_obj->buffer = NULL; } /* Break the COW tie to the region. Both the pbo and the region end * up with a copy of the data. */ void intel_bufferobj_cow(struct intel_context *intel, struct intel_buffer_object *intel_obj) { assert(intel_obj->region); intel_region_cow(intel, intel_obj->region); } /** * Deallocate/free a vertex/pixel buffer object. * Called via glDeleteBuffersARB(). */ static void intel_bufferobj_free(GLcontext * ctx, struct gl_buffer_object *obj) { struct intel_context *intel = intel_context(ctx); struct intel_buffer_object *intel_obj = intel_buffer_object(obj); assert(intel_obj); assert(!obj->Pointer); /* Mesa should have unmapped it */ _mesa_free(intel_obj->sys_buffer); if (intel_obj->region) { intel_bufferobj_release_region(intel, intel_obj); } else if (intel_obj->buffer) { dri_bo_unreference(intel_obj->buffer); } _mesa_free(intel_obj); } /** * Allocate space for and store data in a buffer object. Any data that was * previously stored in the buffer object is lost. If data is NULL, * memory will be allocated, but no copy will occur. * Called via glBufferDataARB(). */ static void intel_bufferobj_data(GLcontext * ctx, GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage, struct gl_buffer_object *obj) { struct intel_context *intel = intel_context(ctx); struct intel_buffer_object *intel_obj = intel_buffer_object(obj); intel_obj->Base.Size = size; intel_obj->Base.Usage = usage; assert(!obj->Pointer); /* Mesa should have unmapped it */ if (intel_obj->region) intel_bufferobj_release_region(intel, intel_obj); if (intel_obj->buffer != NULL) { dri_bo_unreference(intel_obj->buffer); intel_obj->buffer = NULL; } _mesa_free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; if (size != 0) { #ifdef I915 /* On pre-965, stick VBOs in system memory, as we're always doing swtnl * with their contents anyway. */ if (target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER) { intel_obj->sys_buffer = _mesa_malloc(size); if (intel_obj->sys_buffer != NULL) { if (data != NULL) memcpy(intel_obj->sys_buffer, data, size); return; } } #endif intel_bufferobj_alloc_buffer(intel, intel_obj); if (data != NULL) dri_bo_subdata(intel_obj->buffer, 0, size, data); } } /** * Replace data in a subrange of buffer object. If the data range * specified by size + offset extends beyond the end of the buffer or * if data is NULL, no copy is performed. * Called via glBufferSubDataARB(). */ static void intel_bufferobj_subdata(GLcontext * ctx, GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data, struct gl_buffer_object *obj) { struct intel_context *intel = intel_context(ctx); struct intel_buffer_object *intel_obj = intel_buffer_object(obj); assert(intel_obj); if (intel_obj->region) intel_bufferobj_cow(intel, intel_obj); if (intel_obj->sys_buffer) memcpy((char *)intel_obj->sys_buffer + offset, data, size); else dri_bo_subdata(intel_obj->buffer, offset, size, data); } /** * Called via glGetBufferSubDataARB(). */ static void intel_bufferobj_get_subdata(GLcontext * ctx, GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid * data, struct gl_buffer_object *obj) { struct intel_buffer_object *intel_obj = intel_buffer_object(obj); assert(intel_obj); if (intel_obj->sys_buffer) memcpy(data, (char *)intel_obj->sys_buffer + offset, size); else dri_bo_get_subdata(intel_obj->buffer, offset, size, data); } /** * Called via glMapBufferARB(). */ static void * intel_bufferobj_map(GLcontext * ctx, GLenum target, GLenum access, struct gl_buffer_object *obj) { struct intel_context *intel = intel_context(ctx); struct intel_buffer_object *intel_obj = intel_buffer_object(obj); GLboolean read_only = (access == GL_READ_ONLY_ARB); GLboolean write_only = (access == GL_WRITE_ONLY_ARB); assert(intel_obj); if (intel_obj->sys_buffer) { obj->Pointer = intel_obj->sys_buffer; return obj->Pointer; } if (intel_obj->region) intel_bufferobj_cow(intel, intel_obj); if (intel_obj->buffer == NULL) { obj->Pointer = NULL; return NULL; } if (write_only && intel->intelScreen->kernel_exec_fencing) { drm_intel_gem_bo_map_gtt(intel_obj->buffer); intel_obj->mapped_gtt = GL_TRUE; } else { drm_intel_bo_map(intel_obj->buffer, !read_only); intel_obj->mapped_gtt = GL_FALSE; } obj->Pointer = intel_obj->buffer->virtual; return obj->Pointer; } /** * Called via glMapBufferARB(). */ static GLboolean intel_bufferobj_unmap(GLcontext * ctx, GLenum target, struct gl_buffer_object *obj) { struct intel_buffer_object *intel_obj = intel_buffer_object(obj); assert(intel_obj); if (intel_obj->sys_buffer != NULL) { assert(obj->Pointer); obj->Pointer = NULL; } else if (intel_obj->buffer != NULL) { assert(obj->Pointer); if (intel_obj->mapped_gtt) { drm_intel_gem_bo_unmap_gtt(intel_obj->buffer); } else { drm_intel_bo_unmap(intel_obj->buffer); } obj->Pointer = NULL; } return GL_TRUE; } dri_bo * intel_bufferobj_buffer(struct intel_context *intel, struct intel_buffer_object *intel_obj, GLuint flag) { if (intel_obj->region) { if (flag == INTEL_WRITE_PART) intel_bufferobj_cow(intel, intel_obj); else if (flag == INTEL_WRITE_FULL) { intel_bufferobj_release_region(intel, intel_obj); intel_bufferobj_alloc_buffer(intel, intel_obj); } } if (intel_obj->buffer == NULL) { intel_bufferobj_alloc_buffer(intel, intel_obj); intel_bufferobj_subdata(&intel->ctx, GL_ARRAY_BUFFER_ARB, 0, intel_obj->Base.Size, intel_obj->sys_buffer, &intel_obj->Base); _mesa_free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; } return intel_obj->buffer; } void intel_bufferobj_init(struct intel_context *intel) { GLcontext *ctx = &intel->ctx; ctx->Driver.NewBufferObject = intel_bufferobj_alloc; ctx->Driver.DeleteBuffer = intel_bufferobj_free; ctx->Driver.BufferData = intel_bufferobj_data; ctx->Driver.BufferSubData = intel_bufferobj_subdata; ctx->Driver.GetBufferSubData = intel_bufferobj_get_subdata; ctx->Driver.MapBuffer = intel_bufferobj_map; ctx->Driver.UnmapBuffer = intel_bufferobj_unmap; }