1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Shared Memory Communications Direct over ISM devices (SMC-D)
4 * SMC-D ISM device structure definitions.
6 * Copyright IBM Corp. 2018
12 #include <linux/uio.h>
13 #include <linux/mutex.h>
17 struct smcd_dev_list { /* List of SMCD devices */
18 struct list_head list;
19 struct mutex mutex; /* Protects list of devices */
22 extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */
24 struct smc_ism_vlanid { /* VLAN id set on ISM device */
25 struct list_head list;
26 unsigned short vlanid; /* Vlan id */
27 refcount_t refcnt; /* Reference count */
30 struct smc_ism_position { /* ISM device position to write to */
31 u64 token; /* Token of DMB */
32 u32 offset; /* Offset into DMBE */
33 u8 index; /* Index of DMBE */
34 u8 signal; /* Generate interrupt on owner side */
39 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
40 void smc_ism_set_conn(struct smc_connection *conn);
41 void smc_ism_unset_conn(struct smc_connection *conn);
42 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
43 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
44 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
45 struct smc_buf_desc *dmb_desc);
46 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
47 int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
48 void *data, size_t len);
49 int smc_ism_signal_shutdown(struct smc_link_group *lgr);