linux/drivers/infiniband/hw/hns/hns_roce_alloc.c

/*
 * Copyright (c) 2016 Hisilicon Limited.
 * Copyright (c) 2007, 2008 Mellanox Technologies. 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 <linux/vmalloc.h>
#include <rdma/ib_umem.h>
#include "hns_roce_device.h"

void hns_roce_buf_free(struct hns_roce_dev *hr_dev, struct hns_roce_buf *buf)
{ … }

/*
 * Allocate the dma buffer for storing ROCEE table entries
 *
 * @size: required size
 * @page_shift: the unit size in a continuous dma address range
 * @flags: HNS_ROCE_BUF_ flags to control the allocation flow.
 */
struct hns_roce_buf *hns_roce_buf_alloc(struct hns_roce_dev *hr_dev, u32 size,
					u32 page_shift, u32 flags)
{ … }

int hns_roce_get_kmem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs,
			   int buf_cnt, struct hns_roce_buf *buf,
			   unsigned int page_shift)
{ … }

int hns_roce_get_umem_bufs(dma_addr_t *bufs, int buf_cnt, struct ib_umem *umem,
			   unsigned int page_shift)
{ … }

void hns_roce_cleanup_bitmap(struct hns_roce_dev *hr_dev)
{ … }