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/*
* Copyright 2003 VMware, Inc.
* Copyright © 2007 Intel Corporation
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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 intel_upload.c
*
* Batched upload via BOs.
*/
#include "main/imports.h"
#include "main/macros.h"
#include "brw_bufmgr.h"
#include "brw_context.h"
#include "intel_buffer_objects.h"
void
brw_upload_finish(struct brw_uploader *upload)
{
assert((upload->bo == NULL) == (upload->map == NULL));
if (!upload->bo)
return;
brw_bo_unmap(upload->bo);
brw_bo_unreference(upload->bo);
upload->bo = NULL;
upload->map = NULL;
upload->next_offset = 0;
}
/**
* Interface for getting memory for uploading streamed data to the GPU
*
* In most cases, streamed data (for GPU state structures, for example) is
* uploaded through brw_state_batch(), since that interface allows relocations
* from the streamed space returned to other BOs. However, that interface has
* the restriction that the amount of space allocated has to be "small".
*
* This interface, on the other hand, is able to handle arbitrary sized
* allocation requests, though it will batch small allocations into the same
* BO for efficiency and reduced memory footprint.
*
* \note The returned pointer is valid only until brw_upload_finish().
*
* \param out_bo Pointer to a BO, which must point to a valid BO or NULL on
* entry, and will have a reference to the new BO containing the state on
* return.
*
* \param out_offset Offset within the buffer object that the data will land.
*/
void *
brw_upload_space(struct brw_uploader *upload,
uint32_t size,
uint32_t alignment,
struct brw_bo **out_bo,
uint32_t *out_offset)
{
uint32_t offset;
offset = ALIGN_NPOT(upload->next_offset, alignment);
if (upload->bo && offset + size > upload->bo->size) {
brw_upload_finish(upload);
offset = 0;
}
assert((upload->bo == NULL) == (upload->map == NULL));
if (!upload->bo) {
upload->bo = brw_bo_alloc(upload->bufmgr, "streamed data",
MAX2(upload->default_size, size), 4096);
upload->map = brw_bo_map(NULL, upload->bo,
MAP_READ | MAP_WRITE |
MAP_PERSISTENT | MAP_ASYNC);
}
upload->next_offset = offset + size;
*out_offset = offset;
if (*out_bo != upload->bo) {
brw_bo_unreference(*out_bo);
*out_bo = upload->bo;
brw_bo_reference(upload->bo);
}
return upload->map + offset;
}
/**
* Handy interface to upload some data to temporary GPU memory quickly.
*
* References to this memory should not be retained across batch flushes.
*/
void
brw_upload_data(struct brw_uploader *upload,
const void *data,
uint32_t size,
uint32_t alignment,
struct brw_bo **out_bo,
uint32_t *out_offset)
{
void *dst = brw_upload_space(upload, size, alignment, out_bo, out_offset);
memcpy(dst, data, size);
}
void
brw_upload_init(struct brw_uploader *upload,
struct brw_bufmgr *bufmgr,
unsigned default_size)
{
upload->bufmgr = bufmgr;
upload->bo = NULL;
upload->map = NULL;
upload->next_offset = 0;
upload->default_size = default_size;
}
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