1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
4*4882a593Smuzhiyun /* Greg Joyce <greg@opengridcomputing.com> */
5*4882a593Smuzhiyun /* Copyright (c) 2008-2019, IBM Corporation */
6*4882a593Smuzhiyun /* Copyright (c) 2017, Open Grid Computing, Inc. */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef _SIW_CM_H
9*4882a593Smuzhiyun #define _SIW_CM_H
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <net/sock.h>
12*4882a593Smuzhiyun #include <linux/tcp.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <rdma/iw_cm.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun enum siw_cep_state {
17*4882a593Smuzhiyun SIW_EPSTATE_IDLE = 1,
18*4882a593Smuzhiyun SIW_EPSTATE_LISTENING,
19*4882a593Smuzhiyun SIW_EPSTATE_CONNECTING,
20*4882a593Smuzhiyun SIW_EPSTATE_AWAIT_MPAREQ,
21*4882a593Smuzhiyun SIW_EPSTATE_RECVD_MPAREQ,
22*4882a593Smuzhiyun SIW_EPSTATE_AWAIT_MPAREP,
23*4882a593Smuzhiyun SIW_EPSTATE_RDMA_MODE,
24*4882a593Smuzhiyun SIW_EPSTATE_CLOSED
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun struct siw_mpa_info {
28*4882a593Smuzhiyun struct mpa_rr hdr; /* peer mpa hdr in host byte order */
29*4882a593Smuzhiyun struct mpa_v2_data v2_ctrl;
30*4882a593Smuzhiyun struct mpa_v2_data v2_ctrl_req;
31*4882a593Smuzhiyun char *pdata;
32*4882a593Smuzhiyun int bytes_rcvd;
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun struct siw_device;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun struct siw_cep {
38*4882a593Smuzhiyun struct iw_cm_id *cm_id;
39*4882a593Smuzhiyun struct siw_device *sdev;
40*4882a593Smuzhiyun struct list_head devq;
41*4882a593Smuzhiyun spinlock_t lock;
42*4882a593Smuzhiyun struct kref ref;
43*4882a593Smuzhiyun int in_use;
44*4882a593Smuzhiyun wait_queue_head_t waitq;
45*4882a593Smuzhiyun enum siw_cep_state state;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun struct list_head listenq;
48*4882a593Smuzhiyun struct siw_cep *listen_cep;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun struct siw_qp *qp;
51*4882a593Smuzhiyun struct socket *sock;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun struct siw_cm_work *mpa_timer;
54*4882a593Smuzhiyun struct list_head work_freelist;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun struct siw_mpa_info mpa;
57*4882a593Smuzhiyun int ord;
58*4882a593Smuzhiyun int ird;
59*4882a593Smuzhiyun bool enhanced_rdma_conn_est;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun /* Saved upcalls of socket */
62*4882a593Smuzhiyun void (*sk_state_change)(struct sock *sk);
63*4882a593Smuzhiyun void (*sk_data_ready)(struct sock *sk);
64*4882a593Smuzhiyun void (*sk_write_space)(struct sock *sk);
65*4882a593Smuzhiyun void (*sk_error_report)(struct sock *sk);
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun /*
69*4882a593Smuzhiyun * Connection initiator waits 10 seconds to receive an
70*4882a593Smuzhiyun * MPA reply after sending out MPA request. Reponder waits for
71*4882a593Smuzhiyun * 5 seconds for MPA request to arrive if new TCP connection
72*4882a593Smuzhiyun * was set up.
73*4882a593Smuzhiyun */
74*4882a593Smuzhiyun #define MPAREQ_TIMEOUT (HZ * 10)
75*4882a593Smuzhiyun #define MPAREP_TIMEOUT (HZ * 5)
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun enum siw_work_type {
78*4882a593Smuzhiyun SIW_CM_WORK_ACCEPT = 1,
79*4882a593Smuzhiyun SIW_CM_WORK_READ_MPAHDR,
80*4882a593Smuzhiyun SIW_CM_WORK_CLOSE_LLP, /* close socket */
81*4882a593Smuzhiyun SIW_CM_WORK_PEER_CLOSE, /* socket indicated peer close */
82*4882a593Smuzhiyun SIW_CM_WORK_MPATIMEOUT
83*4882a593Smuzhiyun };
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun struct siw_cm_work {
86*4882a593Smuzhiyun struct delayed_work work;
87*4882a593Smuzhiyun struct list_head list;
88*4882a593Smuzhiyun enum siw_work_type type;
89*4882a593Smuzhiyun struct siw_cep *cep;
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun #define to_sockaddr_in(a) (*(struct sockaddr_in *)(&(a)))
93*4882a593Smuzhiyun #define to_sockaddr_in6(a) (*(struct sockaddr_in6 *)(&(a)))
94*4882a593Smuzhiyun
getname_peer(struct socket * s,struct sockaddr_storage * a)95*4882a593Smuzhiyun static inline int getname_peer(struct socket *s, struct sockaddr_storage *a)
96*4882a593Smuzhiyun {
97*4882a593Smuzhiyun return s->ops->getname(s, (struct sockaddr *)a, 1);
98*4882a593Smuzhiyun }
99*4882a593Smuzhiyun
getname_local(struct socket * s,struct sockaddr_storage * a)100*4882a593Smuzhiyun static inline int getname_local(struct socket *s, struct sockaddr_storage *a)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun return s->ops->getname(s, (struct sockaddr *)a, 0);
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
ksock_recv(struct socket * sock,char * buf,size_t size,int flags)105*4882a593Smuzhiyun static inline int ksock_recv(struct socket *sock, char *buf, size_t size,
106*4882a593Smuzhiyun int flags)
107*4882a593Smuzhiyun {
108*4882a593Smuzhiyun struct kvec iov = { buf, size };
109*4882a593Smuzhiyun struct msghdr msg = { .msg_name = NULL, .msg_flags = flags };
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun return kernel_recvmsg(sock, &msg, &iov, 1, size, flags);
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun int siw_connect(struct iw_cm_id *id, struct iw_cm_conn_param *parm);
115*4882a593Smuzhiyun int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *param);
116*4882a593Smuzhiyun int siw_reject(struct iw_cm_id *id, const void *data, u8 len);
117*4882a593Smuzhiyun int siw_create_listen(struct iw_cm_id *id, int backlog);
118*4882a593Smuzhiyun int siw_destroy_listen(struct iw_cm_id *id);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun void siw_cep_get(struct siw_cep *cep);
121*4882a593Smuzhiyun void siw_cep_put(struct siw_cep *cep);
122*4882a593Smuzhiyun int siw_cm_queue_work(struct siw_cep *cep, enum siw_work_type type);
123*4882a593Smuzhiyun
124*4882a593Smuzhiyun int siw_cm_init(void);
125*4882a593Smuzhiyun void siw_cm_exit(void);
126*4882a593Smuzhiyun
127*4882a593Smuzhiyun /*
128*4882a593Smuzhiyun * TCP socket interface
129*4882a593Smuzhiyun */
130*4882a593Smuzhiyun #define sk_to_qp(sk) (((struct siw_cep *)((sk)->sk_user_data))->qp)
131*4882a593Smuzhiyun #define sk_to_cep(sk) ((struct siw_cep *)((sk)->sk_user_data))
132*4882a593Smuzhiyun
133*4882a593Smuzhiyun #endif
134