2 * Copyright (c) 2016 Oracle. All rights reserved.
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6 * General Public License (GPL) Version 2, available from the file
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8 * OpenIB.org BSD license below:
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11 * without modification, are permitted provided that the following
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15 * copyright notice, this list of conditions and the following
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <linux/kernel.h>
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))
51 /* This is stored as mr->r_trans_private. */
53 struct rds_ib_device *device;
54 struct rds_ib_mr_pool *pool;
55 struct rds_ib_connection *ic;
57 struct llist_node llnode;
59 /* unmap_list is for freeing */
60 struct list_head unmap_list;
61 unsigned int remap_count;
63 struct scatterlist *sg;
68 struct rds_ib_fmr fmr;
72 /* Our own little MR pool */
73 struct rds_ib_mr_pool {
74 unsigned int pool_type;
75 struct mutex flush_lock; /* serialize fmr invalidate */
76 struct delayed_work flush_worker; /* flush worker */
78 atomic_t item_count; /* total # of MRs */
79 atomic_t dirty_count; /* # dirty of MRs */
81 struct llist_head drop_list; /* MRs not reached max_maps */
82 struct llist_head free_list; /* unused MRs */
83 struct llist_head clean_list; /* unused & unmapped MRs */
84 wait_queue_head_t flush_wait;
86 atomic_t free_pinned; /* memory pinned by free MRs */
87 unsigned long max_items;
88 unsigned long max_items_soft;
89 unsigned long max_free_pinned;
90 struct ib_fmr_attr fmr_attr;
93 extern struct workqueue_struct *rds_ib_mr_wq;
94 extern unsigned int rds_ib_mr_1m_pool_size;
95 extern unsigned int rds_ib_mr_8k_pool_size;
97 struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev,
99 void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
100 struct rds_info_rdma_connection *iinfo);
101 void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
102 void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
103 struct rds_sock *rs, u32 *key_ret);
104 void rds_ib_sync_mr(void *trans_private, int dir);
105 void rds_ib_free_mr(void *trans_private, int invalidate);
106 void rds_ib_flush_mrs(void);
107 int rds_ib_mr_init(void);
108 void rds_ib_mr_exit(void);
110 void __rds_ib_teardown_mr(struct rds_ib_mr *);
111 void rds_ib_teardown_mr(struct rds_ib_mr *);
112 struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *, int);
113 int rds_ib_map_fmr(struct rds_ib_device *, struct rds_ib_mr *,
114 struct scatterlist *, unsigned int);
115 struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *);
116 int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **);
117 struct rds_ib_mr *rds_ib_reg_fmr(struct rds_ib_device *, struct scatterlist *,
118 unsigned long, u32 *);
119 struct rds_ib_mr *rds_ib_try_reuse_ibmr(struct rds_ib_mr_pool *);
120 void rds_ib_unreg_fmr(struct list_head *, unsigned int *,
121 unsigned long *, unsigned int);
122 void rds_ib_free_fmr_list(struct rds_ib_mr *);