linux/drivers/net/ethernet/mellanox/mlx5/core/uar.c

/*
 * Copyright (c) 2013-2015, 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/kernel.h>
#include <linux/mlx5/driver.h>
#include "mlx5_core.h"

static int mlx5_cmd_alloc_uar(struct mlx5_core_dev *dev, u32 *uarn)
{ … }

static int mlx5_cmd_free_uar(struct mlx5_core_dev *dev, u32 uarn)
{ … }

static int uars_per_sys_page(struct mlx5_core_dev *mdev)
{ … }

static u64 uar2pfn(struct mlx5_core_dev *mdev, u32 index)
{ … }

static void up_rel_func(struct kref *kref)
{ … }

static struct mlx5_uars_page *alloc_uars_page(struct mlx5_core_dev *mdev,
					      bool map_wc)
{ … }

struct mlx5_uars_page *mlx5_get_uars_page(struct mlx5_core_dev *mdev)
{ … }
EXPORT_SYMBOL(…);

void mlx5_put_uars_page(struct mlx5_core_dev *mdev, struct mlx5_uars_page *up)
{ … }
EXPORT_SYMBOL(…);

static unsigned long map_offset(struct mlx5_core_dev *mdev, int dbi)
{ … }

static int alloc_bfreg(struct mlx5_core_dev *mdev, struct mlx5_sq_bfreg *bfreg,
		       bool map_wc, bool fast_path)
{ … }

int mlx5_alloc_bfreg(struct mlx5_core_dev *mdev, struct mlx5_sq_bfreg *bfreg,
		     bool map_wc, bool fast_path)
{ … }
EXPORT_SYMBOL(…);

static unsigned int addr_to_dbi_in_syspage(struct mlx5_core_dev *dev,
					   struct mlx5_uars_page *up,
					   struct mlx5_sq_bfreg *bfreg)
{ … }

void mlx5_free_bfreg(struct mlx5_core_dev *mdev, struct mlx5_sq_bfreg *bfreg)
{ … }
EXPORT_SYMBOL(…);