306 lines
7.1 KiB
C
306 lines
7.1 KiB
C
/**************************************************************************
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*
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* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* A variation of malloc buffers which get transferred to real graphics memory
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* when there is an attempt to validate them.
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*
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* @author Jose Fonseca <jrfonseca@tungstengraphics.com>
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*/
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#include "util/u_debug.h"
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#include "util/u_memory.h"
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#include "pb_buffer.h"
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#include "pb_bufmgr.h"
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struct pb_ondemand_manager;
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struct pb_ondemand_buffer
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{
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struct pb_buffer base;
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struct pb_ondemand_manager *mgr;
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/** Regular malloc'ed memory */
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void *data;
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unsigned mapcount;
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/** Real buffer */
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struct pb_buffer *buffer;
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pb_size size;
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struct pb_desc desc;
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};
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struct pb_ondemand_manager
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{
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struct pb_manager base;
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struct pb_manager *provider;
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};
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extern const struct pb_vtbl pb_ondemand_buffer_vtbl;
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static INLINE struct pb_ondemand_buffer *
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pb_ondemand_buffer(struct pb_buffer *buf)
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{
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assert(buf);
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if (!buf)
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return NULL;
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assert(buf->vtbl == &pb_ondemand_buffer_vtbl);
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return (struct pb_ondemand_buffer *)buf;
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}
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static INLINE struct pb_ondemand_manager *
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pb_ondemand_manager(struct pb_manager *mgr)
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{
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assert(mgr);
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return (struct pb_ondemand_manager *)mgr;
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}
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static void
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pb_ondemand_buffer_destroy(struct pb_buffer *_buf)
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{
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struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
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pb_reference(&buf->buffer, NULL);
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align_free(buf->data);
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FREE(buf);
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}
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static void *
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pb_ondemand_buffer_map(struct pb_buffer *_buf,
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unsigned flags, void *flush_ctx)
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{
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struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
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if(buf->buffer) {
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assert(!buf->data);
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return pb_map(buf->buffer, flags, flush_ctx);
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}
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else {
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assert(buf->data);
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++buf->mapcount;
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return buf->data;
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}
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}
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static void
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pb_ondemand_buffer_unmap(struct pb_buffer *_buf)
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{
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struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
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if(buf->buffer) {
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assert(!buf->data);
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pb_unmap(buf->buffer);
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}
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else {
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assert(buf->data);
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assert(buf->mapcount);
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if(buf->mapcount)
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--buf->mapcount;
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}
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}
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static enum pipe_error
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pb_ondemand_buffer_instantiate(struct pb_ondemand_buffer *buf)
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{
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if(!buf->buffer) {
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struct pb_manager *provider = buf->mgr->provider;
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uint8_t *map;
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assert(!buf->mapcount);
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buf->buffer = provider->create_buffer(provider, buf->size, &buf->desc);
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if(!buf->buffer)
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return PIPE_ERROR_OUT_OF_MEMORY;
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map = pb_map(buf->buffer, PB_USAGE_CPU_READ, NULL);
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if(!map) {
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pb_reference(&buf->buffer, NULL);
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return PIPE_ERROR;
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}
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memcpy(map, buf->data, buf->size);
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pb_unmap(buf->buffer);
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if(!buf->mapcount) {
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FREE(buf->data);
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buf->data = NULL;
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}
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}
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return PIPE_OK;
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}
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static enum pipe_error
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pb_ondemand_buffer_validate(struct pb_buffer *_buf,
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struct pb_validate *vl,
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unsigned flags)
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{
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struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
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enum pipe_error ret;
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assert(!buf->mapcount);
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if(buf->mapcount)
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return PIPE_ERROR;
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ret = pb_ondemand_buffer_instantiate(buf);
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if(ret != PIPE_OK)
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return ret;
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return pb_validate(buf->buffer, vl, flags);
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}
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static void
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pb_ondemand_buffer_fence(struct pb_buffer *_buf,
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struct pipe_fence_handle *fence)
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{
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struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
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assert(buf->buffer);
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if(!buf->buffer)
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return;
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pb_fence(buf->buffer, fence);
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}
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static void
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pb_ondemand_buffer_get_base_buffer(struct pb_buffer *_buf,
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struct pb_buffer **base_buf,
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pb_size *offset)
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{
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struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
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if(pb_ondemand_buffer_instantiate(buf) != PIPE_OK) {
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assert(0);
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*base_buf = &buf->base;
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*offset = 0;
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return;
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}
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pb_get_base_buffer(buf->buffer, base_buf, offset);
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}
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const struct pb_vtbl
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pb_ondemand_buffer_vtbl = {
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pb_ondemand_buffer_destroy,
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pb_ondemand_buffer_map,
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pb_ondemand_buffer_unmap,
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pb_ondemand_buffer_validate,
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pb_ondemand_buffer_fence,
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pb_ondemand_buffer_get_base_buffer
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};
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static struct pb_buffer *
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pb_ondemand_manager_create_buffer(struct pb_manager *_mgr,
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pb_size size,
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const struct pb_desc *desc)
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{
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struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
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struct pb_ondemand_buffer *buf;
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buf = CALLOC_STRUCT(pb_ondemand_buffer);
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if(!buf)
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return NULL;
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pipe_reference_init(&buf->base.reference, 1);
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buf->base.alignment = desc->alignment;
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buf->base.usage = desc->usage;
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buf->base.size = size;
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buf->base.vtbl = &pb_ondemand_buffer_vtbl;
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buf->mgr = mgr;
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buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
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if(!buf->data) {
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FREE(buf);
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return NULL;
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}
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buf->size = size;
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buf->desc = *desc;
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return &buf->base;
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}
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static void
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pb_ondemand_manager_flush(struct pb_manager *_mgr)
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{
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struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
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mgr->provider->flush(mgr->provider);
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}
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static void
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pb_ondemand_manager_destroy(struct pb_manager *_mgr)
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{
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struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
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FREE(mgr);
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}
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struct pb_manager *
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pb_ondemand_manager_create(struct pb_manager *provider)
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{
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struct pb_ondemand_manager *mgr;
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if(!provider)
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return NULL;
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mgr = CALLOC_STRUCT(pb_ondemand_manager);
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if(!mgr)
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return NULL;
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mgr->base.destroy = pb_ondemand_manager_destroy;
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mgr->base.create_buffer = pb_ondemand_manager_create_buffer;
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mgr->base.flush = pb_ondemand_manager_flush;
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mgr->provider = provider;
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return &mgr->base;
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}
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