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) { void *sys_buffer = intel_obj->sys_buffer; /* only one of buffer and sys_buffer could be non-NULL */ intel_bufferobj_alloc_buffer(intel, intel_obj); intel_obj->sys_buffer = NULL; intel_bufferobj_subdata(&intel->ctx, GL_ARRAY_BUFFER_ARB, 0, intel_obj->Base.Size, sys_buffer, &intel_obj->Base); _mesa_free(sys_buffer); intel_obj->sys_buffer = NULL; } return intel_obj->buffer; }
drm_intel_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->source) release_buffer(intel_obj); if (intel_obj->buffer == NULL) { intel_bufferobj_alloc_buffer(intel, intel_obj); drm_intel_bo_subdata(intel_obj->buffer, 0, intel_obj->Base.Size, intel_obj->sys_buffer); free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; intel_obj->offset = 0; } return intel_obj->buffer; }
/** * 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(struct gl_context * ctx, 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); bool busy; if (size == 0) return; assert(intel_obj); /* If we have a single copy in system memory, update that */ if (intel_obj->sys_buffer) { if (intel_obj->source) release_buffer(intel_obj); if (intel_obj->buffer == NULL) { memcpy((char *)intel_obj->sys_buffer + offset, data, size); return; } free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; } /* Otherwise we need to update the copy in video memory. */ busy = drm_intel_bo_busy(intel_obj->buffer) || drm_intel_bo_references(intel->batch.bo, intel_obj->buffer); if (busy) { if (size == intel_obj->Base.Size) { /* Replace the current busy bo with fresh data. */ drm_intel_bo_unreference(intel_obj->buffer); intel_bufferobj_alloc_buffer(intel, intel_obj); drm_intel_bo_subdata(intel_obj->buffer, 0, size, data); } else { perf_debug("Using a blit copy to avoid stalling on %ldb " "glBufferSubData() to a busy buffer object.\n", (long)size); drm_intel_bo *temp_bo = drm_intel_bo_alloc(intel->bufmgr, "subdata temp", size, 64); drm_intel_bo_subdata(temp_bo, 0, size, data); intel_emit_linear_blit(intel, intel_obj->buffer, offset, temp_bo, 0, size); drm_intel_bo_unreference(temp_bo); } } else { drm_intel_bo_subdata(intel_obj->buffer, offset, size, data); } }
/** * The BufferData() driver hook. * * Implements glBufferData(), which recreates a buffer object's data store * and populates it with the given data, if present. * * Any data that was previously stored in the buffer object is lost. * * \return true for success, false if out of memory */ static GLboolean intel_bufferobj_data(struct gl_context * ctx, GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage, struct gl_buffer_object *obj) { struct brw_context *brw = brw_context(ctx); struct intel_buffer_object *intel_obj = intel_buffer_object(obj); /* Part of the ABI, but this function doesn't use it. */ (void) target; intel_obj->Base.Size = size; intel_obj->Base.Usage = usage; assert(!obj->Pointer); /* Mesa should have unmapped it */ if (intel_obj->buffer != NULL) release_buffer(intel_obj); if (size != 0) { intel_bufferobj_alloc_buffer(brw, intel_obj); if (!intel_obj->buffer) return false; if (data != NULL) drm_intel_bo_subdata(intel_obj->buffer, 0, size, data); } return true; }
/** * 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 ctx->Driver.BufferData(). * \return true for success, false if out of memory */ static GLboolean intel_bufferobj_data(struct gl_context * 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); /* Part of the ABI, but this function doesn't use it. */ #ifndef I915 (void) target; #endif intel_obj->Base.Size = size; intel_obj->Base.Usage = usage; assert(!obj->Pointer); /* Mesa should have unmapped it */ if (intel_obj->buffer != NULL) release_buffer(intel_obj); free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; if (size != 0) { if (usage == GL_DYNAMIC_DRAW #ifdef I915 /* On pre-965, stick VBOs in system memory, as we're always doing * swtnl with their contents anyway. */ || target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER #endif ) { intel_obj->sys_buffer = malloc(size); if (intel_obj->sys_buffer != NULL) { if (data != NULL) memcpy(intel_obj->sys_buffer, data, size); return true; } } intel_bufferobj_alloc_buffer(intel, intel_obj); if (!intel_obj->buffer) return false; if (data != NULL) drm_intel_bo_subdata(intel_obj->buffer, 0, size, data); } return true; }
/** * 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 ctx->Driver.BufferData(). * \return GL_TRUE for success, GL_FALSE if out of memory */ static GLboolean 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 GL_TRUE; } } #endif intel_bufferobj_alloc_buffer(intel, intel_obj); if (!intel_obj->buffer) return GL_FALSE; if (data != NULL) dri_bo_subdata(intel_obj->buffer, 0, size, data); } return GL_TRUE; }
drm_intel_bo * intel_bufferobj_buffer(struct intel_context *intel, struct intel_buffer_object *intel_obj, GLuint flag) { if (intel_obj->source) release_buffer(intel_obj); if (intel_obj->buffer == NULL) { intel_bufferobj_alloc_buffer(intel, intel_obj); drm_intel_bo_subdata(intel_obj->buffer, 0, intel_obj->Base.Size, intel_obj->sys_buffer); free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; intel_obj->offset = 0; } return intel_obj->buffer; }
/** * Called via glMapBufferRange and glMapBuffer * * The goal of this extension is to allow apps to accumulate their rendering * at the same time as they accumulate their buffer object. Without it, * you'd end up blocking on execution of rendering every time you mapped * the buffer to put new data in. * * We support it in 3 ways: If unsynchronized, then don't bother * flushing the batchbuffer before mapping the buffer, which can save blocking * in many cases. If we would still block, and they allow the whole buffer * to be invalidated, then just allocate a new buffer to replace the old one. * If not, and we'd block, and they allow the subrange of the buffer to be * invalidated, then we can make a new little BO, let them write into that, * and blit it into the real BO at unmap time. */ static void * intel_bufferobj_map_range(struct gl_context * ctx, GLintptr offset, GLsizeiptr length, GLbitfield access, 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); /* _mesa_MapBufferRange (GL entrypoint) sets these, but the vbo module also * internally uses our functions directly. */ obj->Offset = offset; obj->Length = length; obj->AccessFlags = access; if (intel_obj->sys_buffer) { const bool read_only = (access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == GL_MAP_READ_BIT; if (!read_only && intel_obj->source) release_buffer(intel_obj); if (!intel_obj->buffer || intel_obj->source) { obj->Pointer = intel_obj->sys_buffer + offset; return obj->Pointer; } free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; } if (intel_obj->buffer == NULL) { obj->Pointer = NULL; return NULL; } /* If the access is synchronized (like a normal buffer mapping), then get * things flushed out so the later mapping syncs appropriately through GEM. * If the user doesn't care about existing buffer contents and mapping would * cause us to block, then throw out the old buffer. * * If they set INVALIDATE_BUFFER, we can pitch the current contents to * achieve the required synchronization. */ if (!(access & GL_MAP_UNSYNCHRONIZED_BIT)) { if (drm_intel_bo_references(intel->batch.bo, intel_obj->buffer)) { if (access & GL_MAP_INVALIDATE_BUFFER_BIT) { drm_intel_bo_unreference(intel_obj->buffer); intel_bufferobj_alloc_buffer(intel, intel_obj); } else { perf_debug("Stalling on the GPU for mapping a busy buffer " "object\n"); intel_flush(ctx); } } else if (drm_intel_bo_busy(intel_obj->buffer) && (access & GL_MAP_INVALIDATE_BUFFER_BIT)) { drm_intel_bo_unreference(intel_obj->buffer); intel_bufferobj_alloc_buffer(intel, intel_obj); } } /* If the user is mapping a range of an active buffer object but * doesn't require the current contents of that range, make a new * BO, and we'll copy what they put in there out at unmap or * FlushRange time. */ if ((access & GL_MAP_INVALIDATE_RANGE_BIT) && drm_intel_bo_busy(intel_obj->buffer)) { if (access & GL_MAP_FLUSH_EXPLICIT_BIT) { intel_obj->range_map_buffer = malloc(length); obj->Pointer = intel_obj->range_map_buffer; } else { intel_obj->range_map_bo = drm_intel_bo_alloc(intel->bufmgr, "range map", length, 64); if (!(access & GL_MAP_READ_BIT)) { drm_intel_gem_bo_map_gtt(intel_obj->range_map_bo); } else { drm_intel_bo_map(intel_obj->range_map_bo, (access & GL_MAP_WRITE_BIT) != 0); } obj->Pointer = intel_obj->range_map_bo->virtual; } return obj->Pointer; } if (access & GL_MAP_UNSYNCHRONIZED_BIT) drm_intel_gem_bo_map_unsynchronized(intel_obj->buffer); else if (!(access & GL_MAP_READ_BIT)) { drm_intel_gem_bo_map_gtt(intel_obj->buffer); } else { drm_intel_bo_map(intel_obj->buffer, (access & GL_MAP_WRITE_BIT) != 0); } obj->Pointer = intel_obj->buffer->virtual + offset; return obj->Pointer; }
/** * Called via glMapBufferRange and glMapBuffer * * The goal of this extension is to allow apps to accumulate their rendering * at the same time as they accumulate their buffer object. Without it, * you'd end up blocking on execution of rendering every time you mapped * the buffer to put new data in. * * We support it in 3 ways: If unsynchronized, then don't bother * flushing the batchbuffer before mapping the buffer, which can save blocking * in many cases. If we would still block, and they allow the whole buffer * to be invalidated, then just allocate a new buffer to replace the old one. * If not, and we'd block, and they allow the subrange of the buffer to be * invalidated, then we can make a new little BO, let them write into that, * and blit it into the real BO at unmap time. */ static void * intel_bufferobj_map_range(struct gl_context * ctx, GLintptr offset, GLsizeiptr length, GLbitfield access, 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); /* _mesa_MapBufferRange (GL entrypoint) sets these, but the vbo module also * internally uses our functions directly. */ obj->Offset = offset; obj->Length = length; obj->AccessFlags = access; if (intel_obj->sys_buffer) { const bool read_only = (access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == GL_MAP_READ_BIT; if (!read_only && intel_obj->source) release_buffer(intel_obj); if (!intel_obj->buffer || intel_obj->source) { obj->Pointer = intel_obj->sys_buffer + offset; return obj->Pointer; } free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; } /* If the mapping is synchronized with other GL operations, flush * the batchbuffer so that GEM knows about the buffer access for later * syncing. */ if (!(access & GL_MAP_UNSYNCHRONIZED_BIT) && drm_intel_bo_references(intel->batch.bo, intel_obj->buffer)) intel_flush(ctx); if (intel_obj->buffer == NULL) { obj->Pointer = NULL; return NULL; } /* If the user doesn't care about existing buffer contents and mapping * would cause us to block, then throw out the old buffer. */ if (!(access & GL_MAP_UNSYNCHRONIZED_BIT) && (access & GL_MAP_INVALIDATE_BUFFER_BIT) && drm_intel_bo_busy(intel_obj->buffer)) { drm_intel_bo_unreference(intel_obj->buffer); intel_bufferobj_alloc_buffer(intel, intel_obj); } /* If the user is mapping a range of an active buffer object but * doesn't require the current contents of that range, make a new * BO, and we'll copy what they put in there out at unmap or * FlushRange time. */ if ((access & GL_MAP_INVALIDATE_RANGE_BIT) && drm_intel_bo_busy(intel_obj->buffer)) { if (access & GL_MAP_FLUSH_EXPLICIT_BIT) { intel_obj->range_map_buffer = malloc(length); obj->Pointer = intel_obj->range_map_buffer; } else { intel_obj->range_map_bo = drm_intel_bo_alloc(intel->bufmgr, "range map", length, 64); if (!(access & GL_MAP_READ_BIT)) { drm_intel_gem_bo_map_gtt(intel_obj->range_map_bo); intel_obj->mapped_gtt = true; } else { drm_intel_bo_map(intel_obj->range_map_bo, (access & GL_MAP_WRITE_BIT) != 0); intel_obj->mapped_gtt = false; } obj->Pointer = intel_obj->range_map_bo->virtual; } return obj->Pointer; } if (!(access & GL_MAP_READ_BIT)) { drm_intel_gem_bo_map_gtt(intel_obj->buffer); intel_obj->mapped_gtt = true; } else { drm_intel_bo_map(intel_obj->buffer, (access & GL_MAP_WRITE_BIT) != 0); intel_obj->mapped_gtt = false; } obj->Pointer = intel_obj->buffer->virtual + offset; return obj->Pointer; }
/** * 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(struct gl_context * ctx, 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); bool busy; if (size == 0) return; assert(intel_obj); /* If we have a single copy in system memory, update that */ if (intel_obj->sys_buffer) { if (intel_obj->source) release_buffer(intel_obj); if (intel_obj->buffer == NULL) { memcpy((char *)intel_obj->sys_buffer + offset, data, size); return; } free(intel_obj->sys_buffer); intel_obj->sys_buffer = NULL; } /* Otherwise we need to update the copy in video memory. */ busy = drm_intel_bo_busy(intel_obj->buffer) || drm_intel_bo_references(intel->batch.bo, intel_obj->buffer); /* replace the current busy bo with fresh data */ if (busy && size == intel_obj->Base.Size) { drm_intel_bo_unreference(intel_obj->buffer); intel_bufferobj_alloc_buffer(intel, intel_obj); drm_intel_bo_subdata(intel_obj->buffer, 0, size, data); } else if (intel->gen < 6) { if (busy) { drm_intel_bo *temp_bo; temp_bo = drm_intel_bo_alloc(intel->bufmgr, "subdata temp", size, 64); drm_intel_bo_subdata(temp_bo, 0, size, data); intel_emit_linear_blit(intel, intel_obj->buffer, offset, temp_bo, 0, size); drm_intel_bo_unreference(temp_bo); } else { drm_intel_bo_subdata(intel_obj->buffer, offset, size, data); } } else { /* Can't use the blit to modify the buffer in the middle of batch. */ if (drm_intel_bo_references(intel->batch.bo, intel_obj->buffer)) { intel_batchbuffer_flush(intel); } drm_intel_bo_subdata(intel_obj->buffer, offset, size, data); } }