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
18struct smcd_dev_list {	/* List of SMCD devices */
19	struct list_head list;
20	struct mutex mutex;	/* Protects list of devices */
21};
22
23extern struct smcd_dev_list	smcd_dev_list;	/* list of smcd devices */
24
25struct 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
31struct smc_ism_position {	/* ISM device position to write to */
32	u64 token;		/* Token of DMB */
33	u32 offset;		/* Offset into DMBE */
34	u8 index;		/* Index of DMBE */
35	u8 signal;		/* Generate interrupt on owner side */
36};
37
38struct smcd_dev;
39
40int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
41void smc_ism_set_conn(struct smc_connection *conn);
42void smc_ism_unset_conn(struct smc_connection *conn);
43int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
44int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
45int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
46			 struct smc_buf_desc *dmb_desc);
47int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
48int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
49		  void *data, size_t len);
50int smc_ism_signal_shutdown(struct smc_link_group *lgr);
51void smc_ism_get_system_eid(struct smcd_dev *dev, u8 **eid);
52u16 smc_ism_get_chid(struct smcd_dev *dev);
53bool smc_ism_is_v2_capable(void);
54void smc_ism_init(void);
55int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
56#endif