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- /* 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
- 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];
- };
- 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 */
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