adfaa888a2
ib_fmr_pool_map_phys gets the virtual address by pointer but never writes there, and users (e.g. srp) seem to assume this and ignore the value returned. This patch cleans up the API to get the VA by value, and updates all users. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Acked-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
/*
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* Copyright (c) 2004 Topspin Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: ib_fmr_pool.h 2730 2005-06-28 16:43:03Z sean.hefty $
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*/
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#if !defined(IB_FMR_POOL_H)
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#define IB_FMR_POOL_H
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#include <rdma/ib_verbs.h>
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struct ib_fmr_pool;
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/**
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* struct ib_fmr_pool_param - Parameters for creating FMR pool
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* @max_pages_per_fmr:Maximum number of pages per map request.
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* @page_shift: Log2 of sizeof "pages" mapped by this fmr
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* @access:Access flags for FMRs in pool.
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* @pool_size:Number of FMRs to allocate for pool.
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* @dirty_watermark:Flush is triggered when @dirty_watermark dirty
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* FMRs are present.
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* @flush_function:Callback called when unmapped FMRs are flushed and
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* more FMRs are possibly available for mapping
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* @flush_arg:Context passed to user's flush function.
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* @cache:If set, FMRs may be reused after unmapping for identical map
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* requests.
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*/
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struct ib_fmr_pool_param {
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int max_pages_per_fmr;
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int page_shift;
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enum ib_access_flags access;
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int pool_size;
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int dirty_watermark;
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void (*flush_function)(struct ib_fmr_pool *pool,
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void * arg);
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void *flush_arg;
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unsigned cache:1;
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};
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struct ib_pool_fmr {
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struct ib_fmr *fmr;
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struct ib_fmr_pool *pool;
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struct list_head list;
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struct hlist_node cache_node;
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int ref_count;
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int remap_count;
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u64 io_virtual_address;
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int page_list_len;
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u64 page_list[0];
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};
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struct ib_fmr_pool *ib_create_fmr_pool(struct ib_pd *pd,
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struct ib_fmr_pool_param *params);
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void ib_destroy_fmr_pool(struct ib_fmr_pool *pool);
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int ib_flush_fmr_pool(struct ib_fmr_pool *pool);
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struct ib_pool_fmr *ib_fmr_pool_map_phys(struct ib_fmr_pool *pool_handle,
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u64 *page_list,
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int list_len,
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u64 io_virtual_address);
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int ib_fmr_pool_unmap(struct ib_pool_fmr *fmr);
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#endif /* IB_FMR_POOL_H */
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