2 * Copyright (c) 2016 Oracle. All rights reserved.
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8 * OpenIB.org BSD license below:
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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))
46 enum rds_ib_fr_state {
47 FRMR_IS_FREE, /* mr invalidated & ready for use */
48 FRMR_IS_INUSE, /* mr is in use or used & can be invalidated */
49 FRMR_IS_STALE, /* Stale MR and needs to be dropped */
54 enum rds_ib_fr_state fr_state;
56 wait_queue_head_t fr_inv_done;
58 wait_queue_head_t fr_reg_done;
59 struct ib_send_wr fr_wr;
60 unsigned int dma_npages;
61 unsigned int sg_byte_len;
64 /* This is stored as mr->r_trans_private. */
66 struct delayed_work work;
67 struct rds_ib_device *device;
68 struct rds_ib_mr_pool *pool;
69 struct rds_ib_connection *ic;
71 struct llist_node llnode;
73 /* unmap_list is for freeing */
74 struct list_head unmap_list;
75 unsigned int remap_count;
77 struct scatterlist *sg;
83 struct rds_ib_frmr frmr;
88 /* Our own little MR pool */
89 struct rds_ib_mr_pool {
90 unsigned int pool_type;
91 struct mutex flush_lock; /* serialize fmr invalidate */
92 struct delayed_work flush_worker; /* flush worker */
94 atomic_t item_count; /* total # of MRs */
95 atomic_t dirty_count; /* # dirty of MRs */
97 struct llist_head drop_list; /* MRs not reached max_maps */
98 struct llist_head free_list; /* unused MRs */
99 struct llist_head clean_list; /* unused & unmapped MRs */
100 wait_queue_head_t flush_wait;
101 spinlock_t clean_lock; /* "clean_list" concurrency */
103 atomic_t free_pinned; /* memory pinned by free MRs */
104 unsigned long max_items;
105 unsigned long max_items_soft;
106 unsigned long max_free_pinned;
107 unsigned int max_pages;
110 extern struct workqueue_struct *rds_ib_mr_wq;
111 extern bool prefer_frmr;
113 struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev,
115 void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
116 struct rds_info_rdma_connection *iinfo);
117 void rds6_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
118 struct rds6_info_rdma_connection *iinfo6);
119 void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
120 void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
121 struct rds_sock *rs, u32 *key_ret,
122 struct rds_connection *conn, u64 start, u64 length,
124 void rds_ib_sync_mr(void *trans_private, int dir);
125 void rds_ib_free_mr(void *trans_private, int invalidate);
126 void rds_ib_flush_mrs(void);
127 int rds_ib_mr_init(void);
128 void rds_ib_mr_exit(void);
129 u32 rds_ib_get_lkey(void *trans_private);
131 void __rds_ib_teardown_mr(struct rds_ib_mr *);
132 void rds_ib_teardown_mr(struct rds_ib_mr *);
133 struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *);
134 int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **);
135 struct rds_ib_mr *rds_ib_try_reuse_ibmr(struct rds_ib_mr_pool *);
136 struct rds_ib_mr *rds_ib_reg_frmr(struct rds_ib_device *rds_ibdev,
137 struct rds_ib_connection *ic,
138 struct scatterlist *sg,
139 unsigned long nents, u32 *key);
140 void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed,
141 unsigned long *unpinned, unsigned int goal);
142 void rds_ib_free_frmr_list(struct rds_ib_mr *);