/**************************************************************************
*
* Copyright 2008 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.
*
**************************************************************************/
/**
* @file
* A variation of malloc buffers which get transferred to real graphics memory
* when there is an attempt to validate them.
*
* @author Jose Fonseca <jrfonseca@tungstengraphics.com>
*/
#include "util/u_debug.h"
#include "util/u_memory.h"
#include "pb_buffer.h"
#include "pb_bufmgr.h"
struct pb_ondemand_manager;
struct pb_ondemand_buffer
{
struct pb_buffer base;
struct pb_ondemand_manager *mgr;
/** Regular malloc'ed memory */
void *data;
unsigned mapcount;
/** Real buffer */
struct pb_buffer *buffer;
pb_size size;
struct pb_desc desc;
};
struct pb_ondemand_manager
{
struct pb_manager base;
struct pb_manager *provider;
};
extern const struct pb_vtbl pb_ondemand_buffer_vtbl;
static INLINE struct pb_ondemand_buffer *
pb_ondemand_buffer(struct pb_buffer *buf)
{
if (!buf)
return NULL;
assert(buf
->vtbl
== &pb_ondemand_buffer_vtbl
); return (struct pb_ondemand_buffer *)buf;
}
static INLINE struct pb_ondemand_manager *
pb_ondemand_manager(struct pb_manager *mgr)
{
return (struct pb_ondemand_manager *)mgr;
}
static void
pb_ondemand_buffer_destroy(struct pb_buffer *_buf)
{
struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
pb_reference(&buf->buffer, NULL);
align_free(buf->data);
FREE(buf);
}
static void *
pb_ondemand_buffer_map(struct pb_buffer *_buf,
unsigned flags, void *flush_ctx)
{
struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
if(buf->buffer) {
return pb_map(buf->buffer, flags, flush_ctx);
}
else {
++buf->mapcount;
return buf->data;
}
}
static void
pb_ondemand_buffer_unmap(struct pb_buffer *_buf)
{
struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
if(buf->buffer) {
pb_unmap(buf->buffer);
}
else {
if(buf->mapcount)
--buf->mapcount;
}
}
static enum pipe_error
pb_ondemand_buffer_instantiate(struct pb_ondemand_buffer *buf)
{
if(!buf->buffer) {
struct pb_manager *provider = buf->mgr->provider;
uint8_t *map;
buf->buffer = provider->create_buffer(provider, buf->size, &buf->desc);
if(!buf->buffer)
return PIPE_ERROR_OUT_OF_MEMORY;
map = pb_map(buf->buffer, PB_USAGE_CPU_READ, NULL);
if(!map) {
pb_reference(&buf->buffer, NULL);
return PIPE_ERROR;
}
memcpy(map
, buf
->data
, buf
->size
);
pb_unmap(buf->buffer);
if(!buf->mapcount) {
FREE(buf->data);
buf->data = NULL;
}
}
return PIPE_OK;
}
static enum pipe_error
pb_ondemand_buffer_validate(struct pb_buffer *_buf,
struct pb_validate *vl,
unsigned flags)
{
struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
enum pipe_error ret;
if(buf->mapcount)
return PIPE_ERROR;
ret = pb_ondemand_buffer_instantiate(buf);
if(ret != PIPE_OK)
return ret;
return pb_validate(buf->buffer, vl, flags);
}
static void
pb_ondemand_buffer_fence(struct pb_buffer *_buf,
struct pipe_fence_handle *fence)
{
struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
if(!buf->buffer)
return;
pb_fence(buf->buffer, fence);
}
static void
pb_ondemand_buffer_get_base_buffer(struct pb_buffer *_buf,
struct pb_buffer **base_buf,
pb_size *offset)
{
struct pb_ondemand_buffer *buf = pb_ondemand_buffer(_buf);
if(pb_ondemand_buffer_instantiate(buf) != PIPE_OK) {
*base_buf = &buf->base;
*offset = 0;
return;
}
pb_get_base_buffer(buf->buffer, base_buf, offset);
}
const struct pb_vtbl
pb_ondemand_buffer_vtbl = {
pb_ondemand_buffer_destroy,
pb_ondemand_buffer_map,
pb_ondemand_buffer_unmap,
pb_ondemand_buffer_validate,
pb_ondemand_buffer_fence,
pb_ondemand_buffer_get_base_buffer
};
static struct pb_buffer *
pb_ondemand_manager_create_buffer(struct pb_manager *_mgr,
pb_size size,
const struct pb_desc *desc)
{
struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
struct pb_ondemand_buffer *buf;
buf = CALLOC_STRUCT(pb_ondemand_buffer);
if(!buf)
return NULL;
pipe_reference_init(&buf->base.reference, 1);
buf->base.alignment = desc->alignment;
buf->base.usage = desc->usage;
buf->base.size = size;
buf->base.vtbl = &pb_ondemand_buffer_vtbl;
buf->mgr = mgr;
buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
if(!buf->data) {
FREE(buf);
return NULL;
}
buf->size = size;
buf->desc = *desc;
return &buf->base;
}
static void
pb_ondemand_manager_flush(struct pb_manager *_mgr)
{
struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
mgr->provider->flush(mgr->provider);
}
static void
pb_ondemand_manager_destroy(struct pb_manager *_mgr)
{
struct pb_ondemand_manager *mgr = pb_ondemand_manager(_mgr);
FREE(mgr);
}
struct pb_manager *
pb_ondemand_manager_create(struct pb_manager *provider)
{
struct pb_ondemand_manager *mgr;
if(!provider)
return NULL;
mgr = CALLOC_STRUCT(pb_ondemand_manager);
if(!mgr)
return NULL;
mgr->base.destroy = pb_ondemand_manager_destroy;
mgr->base.create_buffer = pb_ondemand_manager_create_buffer;
mgr->base.flush = pb_ondemand_manager_flush;
mgr->provider = provider;
return &mgr->base;
}