linux/drivers/infiniband/hw/mthca/mthca_memfree.c

/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 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/mm.h>
#include <linux/scatterlist.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <asm/page.h>

#include "mthca_memfree.h"
#include "mthca_dev.h"
#include "mthca_cmd.h"

/*
 * We allocate in as big chunks as we can, up to a maximum of 256 KB
 * per chunk.
 */
enum { … };

struct mthca_user_db_table { … };

static void mthca_free_icm_pages(struct mthca_dev *dev, struct mthca_icm_chunk *chunk)
{ … }

static void mthca_free_icm_coherent(struct mthca_dev *dev, struct mthca_icm_chunk *chunk)
{ … }

void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent)
{ … }

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

static int mthca_alloc_icm_coherent(struct device *dev, struct scatterlist *mem,
				    int order, gfp_t gfp_mask)
{ … }

struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
				  gfp_t gfp_mask, int coherent)
{ … }

int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
{ … }

void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
{ … }

void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle)
{ … }

int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
			  int start, int end)
{ … }

void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
			   int start, int end)
{ … }

struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
					      u64 virt, int obj_size,
					      int nobj, int reserved,
					      int use_lowmem, int use_coherent)
{ … }

void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table)
{ … }

static u64 mthca_uarc_virt(struct mthca_dev *dev, struct mthca_uar *uar, int page)
{ … }

int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
		      struct mthca_user_db_table *db_tab, int index, u64 uaddr)
{ … }

void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
			 struct mthca_user_db_table *db_tab, int index)
{ … }

struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev)
{ … }

void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
			       struct mthca_user_db_table *db_tab)
{ … }

int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
		   u32 qn, __be32 **db)
{ … }

void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
{ … }

int mthca_init_db_tab(struct mthca_dev *dev)
{ … }

void mthca_cleanup_db_tab(struct mthca_dev *dev)
{ … }