Edit File: ib_fmr_pool.h
/* * Copyright (c) 2004 Topspin Corporation. All rights reserved. * Copyright (c) 2005 Sun Microsystems, 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. */ #if !defined(IB_FMR_POOL_H) #define IB_FMR_POOL_H #include <rdma/ib_verbs.h> struct ib_fmr_pool; /** * struct ib_fmr_pool_param - Parameters for creating FMR pool * @max_pages_per_fmr:Maximum number of pages per map request. * @page_shift: Log2 of sizeof "pages" mapped by this fmr * @access:Access flags for FMRs in pool. * @pool_size:Number of FMRs to allocate for pool. * @dirty_watermark:Flush is triggered when @dirty_watermark dirty * FMRs are present. * @flush_function:Callback called when unmapped FMRs are flushed and * more FMRs are possibly available for mapping * @flush_arg:Context passed to user's flush function. * @cache:If set, FMRs may be reused after unmapping for identical map * requests. */ struct ib_fmr_pool_param { int max_pages_per_fmr; int page_shift; enum ib_access_flags access; int pool_size; int dirty_watermark; void (*flush_function)(struct ib_fmr_pool *pool, void *arg); void *flush_arg; unsigned cache:1; }; struct ib_pool_fmr { struct ib_fmr *fmr; struct ib_fmr_pool *pool; struct list_head list; struct hlist_node cache_node; int ref_count; int remap_count; u64 io_virtual_address; int page_list_len; u64 page_list[0]; }; struct ib_fmr_pool *ib_create_fmr_pool(struct ib_pd *pd, struct ib_fmr_pool_param *params); void ib_destroy_fmr_pool(struct ib_fmr_pool *pool); int ib_flush_fmr_pool(struct ib_fmr_pool *pool); struct ib_pool_fmr *ib_fmr_pool_map_phys(struct ib_fmr_pool *pool_handle, u64 *page_list, int list_len, u64 io_virtual_address); int ib_fmr_pool_unmap(struct ib_pool_fmr *fmr); #endif /* IB_FMR_POOL_H */