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 | |
20 | struct sock; |
21 | |
22 | #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ |
23 | |
24 | struct smc_hashinfo { |
25 | rwlock_t lock; |
26 | struct hlist_head ht; |
27 | }; |
28 | |
29 | int smc_hash_sk(struct sock *sk); |
30 | void smc_unhash_sk(struct sock *sk); |
31 | |
32 | /* SMCD/ISM device driver interface */ |
33 | struct 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 | |
52 | struct smcd_dev; |
53 | struct ism_client; |
54 | |
55 | struct smcd_gid { |
56 | u64 gid; |
57 | u64 gid_ext; |
58 | }; |
59 | |
60 | struct smcd_ops { |
61 | int (*query_remote_gid)(struct smcd_dev *dev, struct smcd_gid *rgid, |
62 | u32 vid_valid, u32 vid); |
63 | int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb, |
64 | struct ism_client *client); |
65 | int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); |
66 | int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); |
67 | int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); |
68 | int (*set_vlan_required)(struct smcd_dev *dev); |
69 | int (*reset_vlan_required)(struct smcd_dev *dev); |
70 | int (*signal_event)(struct smcd_dev *dev, struct smcd_gid *rgid, |
71 | u32 trigger_irq, u32 event_code, u64 info); |
72 | int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, |
73 | bool sf, unsigned int offset, void *data, |
74 | unsigned int size); |
75 | int (*supports_v2)(void); |
76 | void (*get_local_gid)(struct smcd_dev *dev, struct smcd_gid *gid); |
77 | u16 (*get_chid)(struct smcd_dev *dev); |
78 | struct device* (*get_dev)(struct smcd_dev *dev); |
79 | }; |
80 | |
81 | struct smcd_dev { |
82 | const struct smcd_ops *ops; |
83 | void *priv; |
84 | struct list_head list; |
85 | spinlock_t lock; |
86 | struct smc_connection **conn; |
87 | struct list_head vlan; |
88 | struct workqueue_struct *event_wq; |
89 | u8 pnetid[SMC_MAX_PNETID_LEN]; |
90 | bool pnetid_by_user; |
91 | struct list_head lgr_list; |
92 | spinlock_t lgr_lock; |
93 | atomic_t lgr_cnt; |
94 | wait_queue_head_t lgrs_deleted; |
95 | u8 going_away : 1; |
96 | }; |
97 | |
98 | #endif /* _SMC_H */ |
99 | |