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42bfba9eaa
SMCD link group termination is called when peer signals its shutdown of its corresponding link group. For regular shutdowns no connections exist anymore. For abnormal shutdowns connections must be killed and their DMBs must be unregistered immediately. That means the SMCR method to delay the link group freeing several seconds does not fit. This patch adds immediate termination of a link group and its SMCD connections and makes sure all SMCD link group related cleanup steps are finished. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/* 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_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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};
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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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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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