linux/drivers/net/ethernet/mellanox/mlx4/icm.c

/*
 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2006, 2007 Cisco Systems, 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 <linux/errno.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>

#include <linux/mlx4/cmd.h>

#include "mlx4.h"
#include "icm.h"
#include "fw.h"

/*
 * We allocate in as big chunks as we can, up to a maximum of 256 KB
 * per chunk. Note that the chunks are not necessarily in contiguous
 * physical memory.
 */
enum { … };

static void mlx4_free_icm_pages(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
{ … }

static void mlx4_free_icm_coherent(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
{ … }

void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent)
{ … }

static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order,
				gfp_t gfp_mask, int node)
{ … }

static int mlx4_alloc_icm_coherent(struct device *dev, struct mlx4_icm_buf *buf,
				   int order, gfp_t gfp_mask)
{ … }

struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
				gfp_t gfp_mask, int coherent)
{ … }

static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt)
{ … }

static int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count)
{ … }

int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm)
{ … }

int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev)
{ … }

int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj)
{ … }

void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj)
{ … }

void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj,
			dma_addr_t *dma_handle)
{ … }

int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
			 u32 start, u32 end)
{ … }

void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
			  u32 start, u32 end)
{ … }

int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
			u64 virt, int obj_size,	u32 nobj, int reserved,
			int use_lowmem, int use_coherent)
{ … }

void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table)
{ … }