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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/mtypes.h"
#include "main/macros.h"
#include "main/bufferobj.h"
#include "brw_context.h"
#include "intel_blit.h"
#include "intel_buffer_objects.h"
#include "intel_batchbuffer.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "brw_context.h"
#define INTEL_UPLOAD_SIZE (64*1024)
void
intel_upload_finish(struct brw_context *brw)
{
assert((brw->upload.bo == NULL) == (brw->upload.map == NULL));
if (!brw->upload.bo)
return;
brw_bo_unmap(brw->upload.bo);
brw_bo_unreference(brw->upload.bo);
brw->upload.bo = NULL;
brw->upload.map = NULL;
brw->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" (see
* estimated_max_prim_size in brw_draw.c).
*
* 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 intel_upload_finish(), which
* will happen at batch flush or the next
* intel_upload_space()/intel_upload_data().
*
* \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 *
intel_upload_space(struct brw_context *brw,
uint32_t size,
uint32_t alignment,
struct brw_bo **out_bo,
uint32_t *out_offset)
{
uint32_t offset;
offset = ALIGN_NPOT(brw->upload.next_offset, alignment);
if (brw->upload.bo && offset + size > brw->upload.bo->size) {
intel_upload_finish(brw);
offset = 0;
}
assert((brw->upload.bo == NULL) == (brw->upload.map == NULL));
if (!brw->upload.bo) {
brw->upload.bo = brw_bo_alloc(brw->bufmgr, "streamed data",
MAX2(INTEL_UPLOAD_SIZE, size), 4096);
brw->upload.map = brw_bo_map(brw, brw->upload.bo, MAP_READ | MAP_WRITE);
}
brw->upload.next_offset = offset + size;
*out_offset = offset;
if (*out_bo != brw->upload.bo) {
brw_bo_unreference(*out_bo);
*out_bo = brw->upload.bo;
brw_bo_reference(brw->upload.bo);
}
return brw->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
intel_upload_data(struct brw_context *brw,
const void *data,
uint32_t size,
uint32_t alignment,
struct brw_bo **out_bo,
uint32_t *out_offset)
{
void *dst = intel_upload_space(brw, size, alignment, out_bo, out_offset);
memcpy(dst, data, size);
}
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