tipc: improve function tipc_wait_for_rcvmsg()
[muen/linux.git] / net / smc / smc_ism.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Shared Memory Communications Direct over ISM devices (SMC-D)
3  *
4  * SMC-D ISM device structure definitions.
5  *
6  * Copyright IBM Corp. 2018
7  */
8
9 #ifndef SMCD_ISM_H
10 #define SMCD_ISM_H
11
12 #include <linux/uio.h>
13
14 #include "smc.h"
15
16 struct smcd_dev_list {  /* List of SMCD devices */
17         struct list_head list;
18         spinlock_t lock;        /* Protects list of devices */
19 };
20
21 extern struct smcd_dev_list     smcd_dev_list; /* list of smcd devices */
22
23 struct smc_ism_vlanid {                 /* VLAN id set on ISM device */
24         struct list_head list;
25         unsigned short vlanid;          /* Vlan id */
26         refcount_t refcnt;              /* Reference count */
27 };
28
29 struct smc_ism_position {       /* ISM device position to write to */
30         u64 token;              /* Token of DMB */
31         u32 offset;             /* Offset into DMBE */
32         u8 index;               /* Index of DMBE */
33         u8 signal;              /* Generate interrupt on owner side */
34 };
35
36 struct smcd_dev;
37
38 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
39 void smc_ism_set_conn(struct smc_connection *conn);
40 void smc_ism_unset_conn(struct smc_connection *conn);
41 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
42 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
43 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
44                          struct smc_buf_desc *dmb_desc);
45 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
46 int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
47                   void *data, size_t len);
48 int smc_ism_signal_shutdown(struct smc_link_group *lgr);
49 #endif