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 #include <linux/types.h>
14 #include <linux/mutex.h>
15
16 #include "smc.h"
17
18 struct smcd_dev_list { /* List of SMCD devices */
19 struct list_head list;
20 struct mutex mutex; /* Protects list of devices */
21 };
22
23 extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */
24
25 struct smc_ism_vlanid { /* VLAN id set on ISM device */
26 struct list_head list;
27 unsigned short vlanid; /* Vlan id */
28 refcount_t refcnt; /* Reference count */
29 };
30
31 struct smcd_dev;
32
33 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
34 void smc_ism_set_conn(struct smc_connection *conn);
35 void smc_ism_unset_conn(struct smc_connection *conn);
36 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
37 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
38 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
39 struct smc_buf_desc *dmb_desc);
40 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
41 int smc_ism_signal_shutdown(struct smc_link_group *lgr);
42 void smc_ism_get_system_eid(u8 **eid);
43 u16 smc_ism_get_chid(struct smcd_dev *dev);
44 bool smc_ism_is_v2_capable(void);
45 int smc_ism_init(void);
46 void smc_ism_exit(void);
47 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
48
smc_ism_write(struct smcd_dev * smcd,u64 dmb_tok,unsigned int idx,bool sf,unsigned int offset,void * data,size_t len)49 static inline int smc_ism_write(struct smcd_dev *smcd, u64 dmb_tok,
50 unsigned int idx, bool sf, unsigned int offset,
51 void *data, size_t len)
52 {
53 int rc;
54
55 rc = smcd->ops->move_data(smcd, dmb_tok, idx, sf, offset, data, len);
56 return rc < 0 ? rc : 0;
57 }
58
59 #endif
60