/* SPDX-License-Identifier: GPL-2.0 */ /* * Shared Memory Communications over RDMA (SMC-R) and RoCE * * Definitions for the SMC module (socket related) * * Copyright IBM Corp. 2016 * * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> */ #ifndef _SMC_H #define _SMC_H #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ struct smc_hashinfo { rwlock_t lock; struct hlist_head ht; }; int smc_hash_sk(struct sock *sk); void smc_unhash_sk(struct sock *sk); /* SMCD/ISM device driver interface */ struct smcd_dmb { u64 dmb_tok; u64 rgid; u32 dmb_len; u32 sba_idx; u32 vlan_valid; u32 vlan_id; void *cpu_addr; dma_addr_t dma_addr; }; #define ISM_EVENT_DMB 0 #define ISM_EVENT_GID 1 #define ISM_EVENT_SWR 2 #define ISM_ERROR 0xFFFF struct smcd_event { u32 type; u32 code; u64 tok; u64 time; u64 info; }; struct smcd_dev; struct smcd_ops { int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid, u32 vid); int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); int (*set_vlan_required)(struct smcd_dev *dev); int (*reset_vlan_required)(struct smcd_dev *dev); int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq, u32 event_code, u64 info); int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, bool sf, unsigned int offset, void *data, unsigned int size); }; struct smcd_dev { const struct smcd_ops *ops; struct device dev; void *priv; u64 local_gid; struct list_head list; spinlock_t lock; struct smc_connection **conn; struct list_head vlan; struct workqueue_struct *event_wq; u8 pnetid[SMC_MAX_PNETID_LEN]; bool pnetid_by_user; struct list_head lgr_list; spinlock_t lgr_lock; atomic_t lgr_cnt; wait_queue_head_t lgrs_deleted; u8 going_away : 1; }; struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, const struct smcd_ops *ops, int max_dmbs); int smcd_register_dev(struct smcd_dev *smcd); void smcd_unregister_dev(struct smcd_dev *smcd); void smcd_free_dev(struct smcd_dev *smcd); void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event); void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit); #endif /* _SMC_H */