summaryrefslogtreecommitdiff
path: root/drivers/infiniband/ulp/rtrs/rtrs-srv.h
blob: 9d8d2a91a235bb588856aac64bf036007b7132d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * RDMA Transport Layer
 *
 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
 */

#ifndef RTRS_SRV_H
#define RTRS_SRV_H

#include <linux/device.h>
#include <linux/refcount.h>
#include "rtrs-pri.h"

/*
 * enum rtrs_srv_state - Server states.
 */
enum rtrs_srv_state {
	RTRS_SRV_CONNECTING,
	RTRS_SRV_CONNECTED,
	RTRS_SRV_CLOSING,
	RTRS_SRV_CLOSED,
};

/* stats for Read and write operation.
 * see Documentation/ABI/testing/sysfs-class-rtrs-server for details
 */
struct rtrs_srv_stats_rdma_stats {
	struct {
		atomic64_t	cnt;
		atomic64_t	size_total;
	} dir[2];
};

struct rtrs_srv_stats {
	struct kobject				kobj_stats;
	struct rtrs_srv_stats_rdma_stats	rdma_stats;
	struct rtrs_srv_sess			*sess;
};

struct rtrs_srv_con {
	struct rtrs_con		c;
	struct list_head	rsp_wr_wait_list;
	spinlock_t		rsp_wr_wait_lock;
};

/* IO context in rtrs_srv, each io has one */
struct rtrs_srv_op {
	struct rtrs_srv_con		*con;
	u32				msg_id;
	u8				dir;
	struct rtrs_msg_rdma_read	*rd_msg;
	struct ib_rdma_wr		tx_wr;
	struct ib_sge			tx_sg;
	struct list_head		wait_list;
	int				status;
};

/*
 * server side memory region context, when always_invalidate=Y, we need
 * queue_depth of memory region to invalidate each memory region.
 */
struct rtrs_srv_mr {
	struct ib_mr	*mr;
	struct sg_table	sgt;
	struct ib_cqe	inv_cqe;	/* only for always_invalidate=true */
	u32		msg_id;		/* only for always_invalidate=true */
	u32		msg_off;	/* only for always_invalidate=true */
	struct rtrs_iu	*iu;		/* send buffer for new rkey msg */
};

struct rtrs_srv_sess {
	struct rtrs_sess	s;
	struct rtrs_srv	*srv;
	struct work_struct	close_work;
	enum rtrs_srv_state	state;
	spinlock_t		state_lock;
	int			cur_cq_vector;
	struct rtrs_srv_op	**ops_ids;
	struct percpu_ref       ids_inflight_ref;
	struct completion       complete_done;
	struct rtrs_srv_mr	*mrs;
	unsigned int		mrs_num;
	dma_addr_t		*dma_addr;
	bool			established;
	unsigned int		mem_bits;
	struct kobject		kobj;
	struct rtrs_srv_stats	*stats;
};

struct rtrs_srv {
	struct list_head	paths_list;
	int			paths_up;
	struct mutex		paths_ev_mutex;
	size_t			paths_num;
	struct mutex		paths_mutex;
	uuid_t			paths_uuid;
	refcount_t		refcount;
	struct rtrs_srv_ctx	*ctx;
	struct list_head	ctx_list;
	void			*priv;
	size_t			queue_depth;
	struct page		**chunks;
	struct device		dev;
	unsigned int		dev_ref;
	struct kobject		*kobj_paths;
};

struct rtrs_srv_ctx {
	struct rtrs_srv_ops ops;
	struct rdma_cm_id *cm_id_ip;
	struct rdma_cm_id *cm_id_ib;
	struct mutex srv_mutex;
	struct list_head srv_list;
};

struct rtrs_srv_ib_ctx {
	struct rtrs_srv_ctx	*srv_ctx;
	u16			port;
	struct mutex            ib_dev_mutex;
	int			ib_dev_count;
};

extern struct class *rtrs_dev_class;

void close_sess(struct rtrs_srv_sess *sess);

static inline void rtrs_srv_update_rdma_stats(struct rtrs_srv_stats *s,
					      size_t size, int d)
{
	atomic64_inc(&s->rdma_stats.dir[d].cnt);
	atomic64_add(size, &s->rdma_stats.dir[d].size_total);
}

/* functions which are implemented in rtrs-srv-stats.c */
int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable);
ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats,
				    char *page, size_t len);
int rtrs_srv_reset_all_stats(struct rtrs_srv_stats *stats, bool enable);
ssize_t rtrs_srv_reset_all_help(struct rtrs_srv_stats *stats,
				 char *page, size_t len);

/* functions which are implemented in rtrs-srv-sysfs.c */
int rtrs_srv_create_sess_files(struct rtrs_srv_sess *sess);
void rtrs_srv_destroy_sess_files(struct rtrs_srv_sess *sess);

#endif /* RTRS_SRV_H */