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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f16a7dd5 UB |
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 | ||
0afff91c UB |
14 | #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ |
15 | ||
f16a7dd5 UB |
16 | struct smc_hashinfo { |
17 | rwlock_t lock; | |
18 | struct hlist_head ht; | |
19 | }; | |
20 | ||
21 | int smc_hash_sk(struct sock *sk); | |
22 | void smc_unhash_sk(struct sock *sk); | |
c6ba7c9b HW |
23 | |
24 | /* SMCD/ISM device driver interface */ | |
25 | struct 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 | ||
201091eb UB |
40 | #define ISM_RESERVED_VLANID 0x1FFF |
41 | ||
42bfba9e UB |
42 | #define ISM_ERROR 0xFFFF |
43 | ||
c6ba7c9b HW |
44 | struct smcd_event { |
45 | u32 type; | |
46 | u32 code; | |
47 | u64 tok; | |
48 | u64 time; | |
49 | u64 info; | |
50 | }; | |
51 | ||
52 | struct smcd_dev; | |
53 | ||
54 | struct smcd_ops { | |
55 | int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid, | |
56 | u32 vid); | |
57 | int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); | |
58 | int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); | |
59 | int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); | |
60 | int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); | |
61 | int (*set_vlan_required)(struct smcd_dev *dev); | |
62 | int (*reset_vlan_required)(struct smcd_dev *dev); | |
63 | int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq, | |
64 | u32 event_code, u64 info); | |
65 | int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, | |
66 | bool sf, unsigned int offset, void *data, | |
67 | unsigned int size); | |
201091eb | 68 | void (*get_system_eid)(struct smcd_dev *dev, u8 **eid); |
8caaccf5 | 69 | u16 (*get_chid)(struct smcd_dev *dev); |
c6ba7c9b HW |
70 | }; |
71 | ||
72 | struct smcd_dev { | |
73 | const struct smcd_ops *ops; | |
74 | struct device dev; | |
75 | void *priv; | |
76 | u64 local_gid; | |
77 | struct list_head list; | |
78 | spinlock_t lock; | |
79 | struct smc_connection **conn; | |
80 | struct list_head vlan; | |
81 | struct workqueue_struct *event_wq; | |
1619f770 | 82 | u8 pnetid[SMC_MAX_PNETID_LEN]; |
f3d74b22 | 83 | bool pnetid_by_user; |
a2351c5d | 84 | struct list_head lgr_list; |
a0a62ee1 | 85 | spinlock_t lgr_lock; |
5edd6b9c UB |
86 | atomic_t lgr_cnt; |
87 | wait_queue_head_t lgrs_deleted; | |
c3d9494e | 88 | u8 going_away : 1; |
c6ba7c9b HW |
89 | }; |
90 | ||
91 | struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, | |
92 | const struct smcd_ops *ops, int max_dmbs); | |
93 | int smcd_register_dev(struct smcd_dev *smcd); | |
94 | void smcd_unregister_dev(struct smcd_dev *smcd); | |
95 | void smcd_free_dev(struct smcd_dev *smcd); | |
96 | void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event); | |
97 | void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit); | |
f16a7dd5 | 98 | #endif /* _SMC_H */ |