1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
4 *
5 * Definitions for the SMC module (socket related)
6 *
7 * Copyright IBM Corp. 2016
8 *
9 * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
10 */
11#ifndef _SMC_H
12#define _SMC_H
13
14#include <linux/device.h>
15#include <linux/spinlock.h>
16#include <linux/types.h>
17#include <linux/wait.h>
18#include "linux/ism.h"
19
20struct sock;
21
22#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
23
24struct smc_hashinfo {
25 rwlock_t lock;
26 struct hlist_head ht;
27};
28
29int smc_hash_sk(struct sock *sk);
30void smc_unhash_sk(struct sock *sk);
31
32/* SMCD/ISM device driver interface */
33struct smcd_dmb {
34 u64 dmb_tok;
35 u64 rgid;
36 u32 dmb_len;
37 u32 sba_idx;
38 u32 vlan_valid;
39 u32 vlan_id;
40 void *cpu_addr;
41 dma_addr_t dma_addr;
42};
43
44#define ISM_EVENT_DMB 0
45#define ISM_EVENT_GID 1
46#define ISM_EVENT_SWR 2
47
48#define ISM_RESERVED_VLANID 0x1FFF
49
50#define ISM_ERROR 0xFFFF
51
52struct smcd_dev;
53struct ism_client;
54
55struct smcd_ops {
56 int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
57 u32 vid);
58 int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb,
59 struct ism_client *client);
60 int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
61 int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
62 int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
63 int (*set_vlan_required)(struct smcd_dev *dev);
64 int (*reset_vlan_required)(struct smcd_dev *dev);
65 int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq,
66 u32 event_code, u64 info);
67 int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
68 bool sf, unsigned int offset, void *data,
69 unsigned int size);
70 int (*supports_v2)(void);
71 u8* (*get_system_eid)(void);
72 u64 (*get_local_gid)(struct smcd_dev *dev);
73 u16 (*get_chid)(struct smcd_dev *dev);
74 struct device* (*get_dev)(struct smcd_dev *dev);
75};
76
77struct smcd_dev {
78 const struct smcd_ops *ops;
79 void *priv;
80 struct list_head list;
81 spinlock_t lock;
82 struct smc_connection **conn;
83 struct list_head vlan;
84 struct workqueue_struct *event_wq;
85 u8 pnetid[SMC_MAX_PNETID_LEN];
86 bool pnetid_by_user;
87 struct list_head lgr_list;
88 spinlock_t lgr_lock;
89 atomic_t lgr_cnt;
90 wait_queue_head_t lgrs_deleted;
91 u8 going_away : 1;
92};
93
94#endif /* _SMC_H */
95

source code of linux/include/net/smc.h