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 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); 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 40 #define ISM_ERROR 0xFFFF 41 42 struct smcd_event { 43 u32 type; 44 u32 code; 45 u64 tok; 46 u64 time; 47 u64 info; 48 }; 49 50 struct smcd_dev; 51 52 struct smcd_ops { 53 int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid, 54 u32 vid); 55 int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 56 int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 57 int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 58 int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 59 int (*set_vlan_required)(struct smcd_dev *dev); 60 int (*reset_vlan_required)(struct smcd_dev *dev); 61 int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq, 62 u32 event_code, u64 info); 63 int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, 64 bool sf, unsigned int offset, void *data, 65 unsigned int size); 66 }; 67 68 struct smcd_dev { 69 const struct smcd_ops *ops; 70 struct device dev; 71 void *priv; 72 u64 local_gid; 73 struct list_head list; 74 spinlock_t lock; 75 struct smc_connection **conn; 76 struct list_head vlan; 77 struct workqueue_struct *event_wq; 78 u8 pnetid[SMC_MAX_PNETID_LEN]; 79 bool pnetid_by_user; 80 struct list_head lgr_list; 81 spinlock_t lgr_lock; 82 atomic_t lgr_cnt; 83 wait_queue_head_t lgrs_deleted; 84 u8 going_away : 1; 85 }; 86 87 struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, 88 const struct smcd_ops *ops, int max_dmbs); 89 int smcd_register_dev(struct smcd_dev *smcd); 90 void smcd_unregister_dev(struct smcd_dev *smcd); 91 void smcd_free_dev(struct smcd_dev *smcd); 92 void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event); 93 void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit); 94 #endif /* _SMC_H */ 95