2 * Intel MIC Platform Software Stack (MPSS)
4 * Copyright(c) 2014 Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2, as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
21 #include <linux/delay.h>
22 #include <linux/scif.h>
23 #include <linux/scif_ioctl.h>
25 #define SCIF_EPLOCK_HELD true
41 * struct scif_conreq - Data structure added to the connection list.
43 * @msg: connection request message received
44 * @list: link to list of connection requests
48 struct list_head list;
51 /* Size of the RB for the Endpoint QP */
52 #define SCIF_ENDPT_QP_SIZE 0x1000
55 * scif_endpt_qp_info - SCIF endpoint queue pair
57 * @qp - Qpair for this endpoint
58 * @qp_offset - DMA address of the QP
59 * @gnt_pld - Payload in a SCIF_CNCT_GNT message containing the
60 * physical address of the remote_qp.
62 struct scif_endpt_qp_info {
69 * struct scif_endpt - The SCIF endpoint data structure
71 * @state: end point state
72 * @lock: lock synchronizing access to endpoint fields like state etc
73 * @port: self port information
74 * @peer: peer port information
75 * @backlog: maximum pending connection requests
76 * @qp_info: Endpoint QP information for SCIF messaging
77 * @remote_dev: scifdev used by this endpt to communicate with remote node.
78 * @remote_ep: remote endpoint
79 * @conreqcnt: Keep track of number of connection requests.
80 * @files: Open file information used to match the id passed in with
82 * @conlist: list of connection requests
83 * @conwq: waitqueue for connection processing
84 * @discon: completion used during disconnection
85 * @sendwq: waitqueue used during sending messages
86 * @recvwq: waitqueue used during message receipt
87 * @sendlock: Synchronize ordering of messages sent
88 * @recvlock: Synchronize ordering of messages received
89 * @list: link to list of various endpoints like connected, listening etc
90 * @li_accept: pending ACCEPTREG
91 * @acceptcnt: pending ACCEPTREG cnt
92 * @liacceptlist: link to listen accept
93 * @miacceptlist: link to uaccept
94 * @listenep: associated listen ep
95 * @conn_work: Non blocking connect work
96 * @conn_port: Connection port
97 * @conn_err: Errors during connection
98 * @conn_async_state: Async connection
99 * @conn_pend_wq: Used by poll while waiting for incoming connections
100 * @conn_list: List of async connection requests
101 * @anon: anonymous file for use in kernel mode scif poll
104 enum scif_epd_state state;
106 struct scif_port_id port;
107 struct scif_port_id peer;
109 struct scif_endpt_qp_info qp_info;
110 struct scif_dev *remote_dev;
113 struct files_struct *files;
114 struct list_head conlist;
115 wait_queue_head_t conwq;
116 struct completion discon;
117 wait_queue_head_t sendwq;
118 wait_queue_head_t recvwq;
119 struct mutex sendlock;
120 struct mutex recvlock;
121 struct list_head list;
122 struct list_head li_accept;
124 struct list_head liacceptlist;
125 struct list_head miacceptlist;
126 struct scif_endpt *listenep;
127 struct scif_port_id conn_port;
129 int conn_async_state;
130 wait_queue_head_t conn_pend_wq;
131 struct list_head conn_list;
135 static inline int scifdev_alive(struct scif_endpt *ep)
137 return _scifdev_alive(ep->remote_dev);
140 static inline int scif_anon_inode_getfile(scif_epd_t epd)
142 epd->anon = anon_inode_getfile("scif", &scif_anon_fops, NULL, 0);
143 if (IS_ERR(epd->anon))
144 return PTR_ERR(epd->anon);
148 static inline void scif_anon_inode_fput(scif_epd_t epd)
156 void scif_cleanup_zombie_epd(void);
157 void scif_teardown_ep(void *endpt);
158 void scif_cleanup_ep_qp(struct scif_endpt *ep);
159 void scif_add_epd_to_zombie_list(struct scif_endpt *ep, bool eplock_held);
160 void scif_get_node_info(void);
161 void scif_send_acks(struct scif_dev *dev);
162 void scif_conn_handler(struct work_struct *work);
163 int scif_rsrv_port(u16 port);
164 void scif_get_port(u16 port);
165 int scif_get_new_port(void);
166 void scif_put_port(u16 port);
167 int scif_user_send(scif_epd_t epd, void __user *msg, int len, int flags);
168 int scif_user_recv(scif_epd_t epd, void __user *msg, int len, int flags);
169 void scif_cnctreq(struct scif_dev *scifdev, struct scifmsg *msg);
170 void scif_cnctgnt(struct scif_dev *scifdev, struct scifmsg *msg);
171 void scif_cnctgnt_ack(struct scif_dev *scifdev, struct scifmsg *msg);
172 void scif_cnctgnt_nack(struct scif_dev *scifdev, struct scifmsg *msg);
173 void scif_cnctrej(struct scif_dev *scifdev, struct scifmsg *msg);
174 void scif_discnct(struct scif_dev *scifdev, struct scifmsg *msg);
175 void scif_discnt_ack(struct scif_dev *scifdev, struct scifmsg *msg);
176 void scif_clientsend(struct scif_dev *scifdev, struct scifmsg *msg);
177 void scif_clientrcvd(struct scif_dev *scifdev, struct scifmsg *msg);
178 int __scif_connect(scif_epd_t epd, struct scif_port_id *dst, bool non_block);
179 int __scif_flush(scif_epd_t epd);
180 unsigned int __scif_pollfd(struct file *f, poll_table *wait,
181 struct scif_endpt *ep);
182 #endif /* SCIF_EPD_H */