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/*
* Copyright (c) 2006, 2007 Cisco, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 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.
*/
#include <config.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/mman.h>
#include "mlx4.h"
static void mlx4_free_buf_extern(struct mlx4_context *ctx, struct mlx4_buf *buf)
{
ibv_dofork_range(buf->buf, buf->length);
ctx->extern_alloc.free(buf->buf, ctx->extern_alloc.data);
}
static int mlx4_alloc_buf_extern(struct mlx4_context *ctx, struct mlx4_buf *buf,
size_t size)
{
void *addr;
addr = ctx->extern_alloc.alloc(size, ctx->extern_alloc.data);
if (addr || size == 0) {
if (ibv_dontfork_range(addr, size)) {
ctx->extern_alloc.free(addr,
ctx->extern_alloc.data);
return -1;
}
buf->buf = addr;
buf->length = size;
return 0;
}
return -1;
}
static bool mlx4_is_extern_alloc(struct mlx4_context *context)
{
return context->extern_alloc.alloc && context->extern_alloc.free;
}
int mlx4_alloc_buf(struct mlx4_context *ctx, struct mlx4_buf *buf,
size_t size, int page_size)
{
int ret;
if (mlx4_is_extern_alloc(ctx))
return mlx4_alloc_buf_extern(ctx, buf, size);
buf->length = align(size, page_size);
buf->buf = mmap(NULL, buf->length, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (buf->buf == MAP_FAILED)
return errno;
ret = ibv_dontfork_range(buf->buf, size);
if (ret)
munmap(buf->buf, buf->length);
return ret;
}
void mlx4_free_buf(struct mlx4_context *context, struct mlx4_buf *buf)
{
if (mlx4_is_extern_alloc(context))
return mlx4_free_buf_extern(context, buf);
if (buf->length) {
ibv_dofork_range(buf->buf, buf->length);
munmap(buf->buf, buf->length);
}
}
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