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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#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
15
16struct smc_hashinfo {
17 rwlock_t lock;
18 struct hlist_head ht;
19};
20
21int smc_hash_sk(struct sock *sk);
22void smc_unhash_sk(struct sock *sk);
23
24/* SMCD/ISM device driver interface */
25struct smcd_dmb {
26 u64 dmb_tok;
27 u64 rgid;
28 u32 dmb_len;
29 u32 sba_idx;
30 u32 vlan_valid;
31 u32 vlan_id;
32 void *cpu_addr;
33 dma_addr_t dma_addr;
34};
35
36#define ISM_EVENT_DMB 0
37#define ISM_EVENT_GID 1
38#define ISM_EVENT_SWR 2
39
40struct smcd_event {
41 u32 type;
42 u32 code;
43 u64 tok;
44 u64 time;
45 u64 info;
46};
47
48struct smcd_dev;
49
50struct smcd_ops {
51 int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
52 u32 vid);
53 int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
54 int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
55 int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
56 int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
57 int (*set_vlan_required)(struct smcd_dev *dev);
58 int (*reset_vlan_required)(struct smcd_dev *dev);
59 int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq,
60 u32 event_code, u64 info);
61 int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
62 bool sf, unsigned int offset, void *data,
63 unsigned int size);
64};
65
66struct smcd_dev {
67 const struct smcd_ops *ops;
68 struct device dev;
69 void *priv;
70 u64 local_gid;
71 struct list_head list;
72 spinlock_t lock;
73 struct smc_connection **conn;
74 struct list_head vlan;
75 struct workqueue_struct *event_wq;
76 u8 pnetid[SMC_MAX_PNETID_LEN];
77 bool pnetid_by_user;
78};
79
80struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
81 const struct smcd_ops *ops, int max_dmbs);
82int smcd_register_dev(struct smcd_dev *smcd);
83void smcd_unregister_dev(struct smcd_dev *smcd);
84void smcd_free_dev(struct smcd_dev *smcd);
85void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event);
86void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit);
87#endif /* _SMC_H */