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f6df683f | 1 | /* |
2 | * Copyright (c) 2016 Oracle. 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 | #ifndef _RDS_IB_MR_H | |
33 | #define _RDS_IB_MR_H | |
34 | ||
35 | #include <linux/kernel.h> | |
36 | ||
37 | #include "rds.h" | |
38 | #include "ib.h" | |
39 | ||
40 | #define RDS_MR_1M_POOL_SIZE (8192 / 2) | |
41 | #define RDS_MR_1M_MSG_SIZE 256 | |
42 | #define RDS_MR_8K_MSG_SIZE 2 | |
43 | #define RDS_MR_8K_SCALE (256 / (RDS_MR_8K_MSG_SIZE + 1)) | |
44 | #define RDS_MR_8K_POOL_SIZE (RDS_MR_8K_SCALE * (8192 / 2)) | |
45 | ||
a69365a3 | 46 | struct rds_ib_fmr { |
47 | struct ib_fmr *fmr; | |
48 | u64 *dma; | |
49 | }; | |
50 | ||
f6df683f | 51 | /* This is stored as mr->r_trans_private. */ |
52 | struct rds_ib_mr { | |
53 | struct rds_ib_device *device; | |
54 | struct rds_ib_mr_pool *pool; | |
f6df683f | 55 | |
56 | struct llist_node llnode; | |
57 | ||
58 | /* unmap_list is for freeing */ | |
59 | struct list_head unmap_list; | |
60 | unsigned int remap_count; | |
61 | ||
62 | struct scatterlist *sg; | |
63 | unsigned int sg_len; | |
f6df683f | 64 | int sg_dma_len; |
a69365a3 | 65 | |
66 | union { | |
67 | struct rds_ib_fmr fmr; | |
68 | } u; | |
f6df683f | 69 | }; |
70 | ||
71 | /* Our own little MR pool */ | |
72 | struct rds_ib_mr_pool { | |
73 | unsigned int pool_type; | |
74 | struct mutex flush_lock; /* serialize fmr invalidate */ | |
75 | struct delayed_work flush_worker; /* flush worker */ | |
76 | ||
77 | atomic_t item_count; /* total # of MRs */ | |
78 | atomic_t dirty_count; /* # dirty of MRs */ | |
79 | ||
80 | struct llist_head drop_list; /* MRs not reached max_maps */ | |
81 | struct llist_head free_list; /* unused MRs */ | |
82 | struct llist_head clean_list; /* unused & unmapped MRs */ | |
83 | wait_queue_head_t flush_wait; | |
84 | ||
85 | atomic_t free_pinned; /* memory pinned by free MRs */ | |
86 | unsigned long max_items; | |
87 | unsigned long max_items_soft; | |
88 | unsigned long max_free_pinned; | |
89 | struct ib_fmr_attr fmr_attr; | |
90 | }; | |
91 | ||
92 | extern struct workqueue_struct *rds_ib_mr_wq; | |
93 | extern unsigned int rds_ib_mr_1m_pool_size; | |
94 | extern unsigned int rds_ib_mr_8k_pool_size; | |
95 | ||
96 | struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev, | |
97 | int npages); | |
98 | void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, | |
99 | struct rds_info_rdma_connection *iinfo); | |
100 | void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *); | |
101 | void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents, | |
102 | struct rds_sock *rs, u32 *key_ret); | |
103 | void rds_ib_sync_mr(void *trans_private, int dir); | |
104 | void rds_ib_free_mr(void *trans_private, int invalidate); | |
105 | void rds_ib_flush_mrs(void); | |
106 | int rds_ib_mr_init(void); | |
107 | void rds_ib_mr_exit(void); | |
108 | ||
109 | void __rds_ib_teardown_mr(struct rds_ib_mr *); | |
110 | void rds_ib_teardown_mr(struct rds_ib_mr *); | |
111 | struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *, int); | |
112 | int rds_ib_map_fmr(struct rds_ib_device *, struct rds_ib_mr *, | |
113 | struct scatterlist *, unsigned int); | |
114 | struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *); | |
115 | int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **); | |
116 | #endif |