ib_fmr_pool.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
    3  *
    4  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
    5  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
    6  *
    7  * This software is available to you under a choice of one of two
    8  * licenses.  You may choose to be licensed under the terms of the GNU
    9  * General Public License (GPL) Version 2, available from the file
   10  * COPYING in the main directory of this source tree, or the
   11  * OpenIB.org BSD license below:
   12  *
   13  *     Redistribution and use in source and binary forms, with or
   14  *     without modification, are permitted provided that the following
   15  *     conditions are met:
   16  *
   17  *      - Redistributions of source code must retain the above
   18  *        copyright notice, this list of conditions and the following
   19  *        disclaimer.
   20  *
   21  *      - Redistributions in binary form must reproduce the above
   22  *        copyright notice, this list of conditions and the following
   23  *        disclaimer in the documentation and/or other materials
   24  *        provided with the distribution.
   25  *
   26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   33  * SOFTWARE.
   34  *
   35  * $FreeBSD$
   36  */
   37 
   38 #if !defined(IB_FMR_POOL_H)
   39 #define IB_FMR_POOL_H
   40 
   41 #include <rdma/ib_verbs.h>
   42 
   43 struct ib_fmr_pool;
   44 
   45 /**
   46  * struct ib_fmr_pool_param - Parameters for creating FMR pool
   47  * @max_pages_per_fmr:Maximum number of pages per map request.
   48  * @page_shift: Log2 of sizeof "pages" mapped by this fmr
   49  * @access:Access flags for FMRs in pool.
   50  * @pool_size:Number of FMRs to allocate for pool.
   51  * @dirty_watermark:Flush is triggered when @dirty_watermark dirty
   52  *     FMRs are present.
   53  * @flush_function:Callback called when unmapped FMRs are flushed and
   54  *     more FMRs are possibly available for mapping
   55  * @flush_arg:Context passed to user's flush function.
   56  * @cache:If set, FMRs may be reused after unmapping for identical map
   57  *     requests.
   58  */
   59 struct ib_fmr_pool_param {
   60         int                     max_pages_per_fmr;
   61         int                     page_shift;
   62         enum ib_access_flags    access;
   63         int                     pool_size;
   64         int                     dirty_watermark;
   65         void                  (*flush_function)(struct ib_fmr_pool *pool,
   66                                                 void               *arg);
   67         void                   *flush_arg;
   68         unsigned                cache:1;
   69 };
   70 
   71 struct ib_pool_fmr {
   72         struct ib_fmr      *fmr;
   73         struct ib_fmr_pool *pool;
   74         struct list_head    list;
   75         struct hlist_node   cache_node;
   76         int                 ref_count;
   77         int                 remap_count;
   78         u64                 io_virtual_address;
   79         int                 page_list_len;
   80         u64                 page_list[0];
   81 };
   82 
   83 struct ib_fmr_pool *ib_create_fmr_pool(struct ib_pd             *pd,
   84                                        struct ib_fmr_pool_param *params);
   85 
   86 void ib_destroy_fmr_pool(struct ib_fmr_pool *pool);
   87 
   88 int ib_flush_fmr_pool(struct ib_fmr_pool *pool);
   89 
   90 struct ib_pool_fmr *ib_fmr_pool_map_phys(struct ib_fmr_pool *pool_handle,
   91                                          u64                *page_list,
   92                                          int                 list_len,
   93                                          u64                 io_virtual_address);
   94 
   95 int ib_fmr_pool_unmap(struct ib_pool_fmr *fmr);
   96 
   97 #endif /* IB_FMR_POOL_H */

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FreeBSD/Linux Kernel Cross Reference sys/ofed/include/rdma/ib_fmr_pool.h

FreeBSD/Linux Kernel Cross Reference
sys/ofed/include/rdma/ib_fmr_pool.h