/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* Definitions for the SMC module (socket related)
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*
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* Copyright IBM Corp. 2016
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*
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* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
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*/
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#ifndef _SMC_H
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#define _SMC_H
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#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
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struct smc_hashinfo {
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rwlock_t lock;
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struct hlist_head ht;
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};
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int smc_hash_sk(struct sock *sk);
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void smc_unhash_sk(struct sock *sk);
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/* SMCD/ISM device driver interface */
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struct smcd_dmb {
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u64 dmb_tok;
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u64 rgid;
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u32 dmb_len;
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u32 sba_idx;
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u32 vlan_valid;
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u32 vlan_id;
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void *cpu_addr;
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dma_addr_t dma_addr;
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};
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#define ISM_EVENT_DMB 0
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#define ISM_EVENT_GID 1
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#define ISM_EVENT_SWR 2
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#define ISM_RESERVED_VLANID 0x1FFF
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#define ISM_ERROR 0xFFFF
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struct smcd_event {
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u32 type;
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u32 code;
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u64 tok;
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u64 time;
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u64 info;
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};
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struct smcd_dev;
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struct smcd_ops {
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int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
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u32 vid);
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int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
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int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
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int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
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int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
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int (*set_vlan_required)(struct smcd_dev *dev);
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int (*reset_vlan_required)(struct smcd_dev *dev);
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int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq,
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u32 event_code, u64 info);
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int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
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bool sf, unsigned int offset, void *data,
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unsigned int size);
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void (*get_system_eid)(struct smcd_dev *dev, u8 **eid);
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u16 (*get_chid)(struct smcd_dev *dev);
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};
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struct smcd_dev {
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const struct smcd_ops *ops;
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struct device dev;
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void *priv;
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u64 local_gid;
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struct list_head list;
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spinlock_t lock;
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struct smc_connection **conn;
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struct list_head vlan;
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struct workqueue_struct *event_wq;
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u8 pnetid[SMC_MAX_PNETID_LEN];
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bool pnetid_by_user;
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struct list_head lgr_list;
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spinlock_t lgr_lock;
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atomic_t lgr_cnt;
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wait_queue_head_t lgrs_deleted;
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u8 going_away : 1;
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};
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struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
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const struct smcd_ops *ops, int max_dmbs);
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int smcd_register_dev(struct smcd_dev *smcd);
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void smcd_unregister_dev(struct smcd_dev *smcd);
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void smcd_free_dev(struct smcd_dev *smcd);
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void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event);
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void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit);
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#endif /* _SMC_H */
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