| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | * |
| 32 | * $Id: ib_fmr_pool.h 1349 2004-12-16 21:09:43Z roland $ |
| 33 | */ |
| 34 | |
| 35 | #if !defined(IB_FMR_POOL_H) |
| 36 | #define IB_FMR_POOL_H |
| 37 | |
| 38 | #include <ib_verbs.h> |
| 39 | |
| 40 | struct ib_fmr_pool; |
| 41 | |
| 42 | /** |
| 43 | * struct ib_fmr_pool_param - Parameters for creating FMR pool |
| 44 | * @max_pages_per_fmr:Maximum number of pages per map request. |
| 45 | * @access:Access flags for FMRs in pool. |
| 46 | * @pool_size:Number of FMRs to allocate for pool. |
| 47 | * @dirty_watermark:Flush is triggered when @dirty_watermark dirty |
| 48 | * FMRs are present. |
| 49 | * @flush_function:Callback called when unmapped FMRs are flushed and |
| 50 | * more FMRs are possibly available for mapping |
| 51 | * @flush_arg:Context passed to user's flush function. |
| 52 | * @cache:If set, FMRs may be reused after unmapping for identical map |
| 53 | * requests. |
| 54 | */ |
| 55 | struct ib_fmr_pool_param { |
| 56 | int max_pages_per_fmr; |
| 57 | enum ib_access_flags access; |
| 58 | int pool_size; |
| 59 | int dirty_watermark; |
| 60 | void (*flush_function)(struct ib_fmr_pool *pool, |
| 61 | void * arg); |
| 62 | void *flush_arg; |
| 63 | unsigned cache:1; |
| 64 | }; |
| 65 | |
| 66 | struct ib_pool_fmr { |
| 67 | struct ib_fmr *fmr; |
| 68 | struct ib_fmr_pool *pool; |
| 69 | struct list_head list; |
| 70 | struct hlist_node cache_node; |
| 71 | int ref_count; |
| 72 | int remap_count; |
| 73 | u64 io_virtual_address; |
| 74 | int page_list_len; |
| 75 | u64 page_list[0]; |
| 76 | }; |
| 77 | |
| 78 | struct ib_fmr_pool *ib_create_fmr_pool(struct ib_pd *pd, |
| 79 | struct ib_fmr_pool_param *params); |
| 80 | |
| 81 | int ib_destroy_fmr_pool(struct ib_fmr_pool *pool); |
| 82 | |
| 83 | int ib_flush_fmr_pool(struct ib_fmr_pool *pool); |
| 84 | |
| 85 | struct ib_pool_fmr *ib_fmr_pool_map_phys(struct ib_fmr_pool *pool_handle, |
| 86 | u64 *page_list, |
| 87 | int list_len, |
| 88 | u64 *io_virtual_address); |
| 89 | |
| 90 | int ib_fmr_pool_unmap(struct ib_pool_fmr *fmr); |
| 91 | |
| 92 | #endif /* IB_FMR_POOL_H */ |