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 #include <linux/device.h> 15 #include <linux/spinlock.h> 16 #include <linux/types.h> 17 #include <linux/wait.h> 18 #include <linux/dibs.h> 19 20 struct sock; 21 22 #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ 23 24 struct smc_hashinfo { 25 rwlock_t lock; 26 struct hlist_head ht; 27 }; 28 29 /* SMCD/ISM device driver interface */ 30 #define ISM_RESERVED_VLANID 0x1FFF 31 32 struct smcd_gid { 33 u64 gid; 34 u64 gid_ext; 35 }; 36 37 struct smcd_dev { 38 struct dibs_dev *dibs; 39 struct list_head list; 40 spinlock_t lock; 41 struct smc_connection **conn; 42 struct list_head vlan; 43 struct workqueue_struct *event_wq; 44 u8 pnetid[SMC_MAX_PNETID_LEN]; 45 bool pnetid_by_user; 46 struct list_head lgr_list; 47 spinlock_t lgr_lock; 48 atomic_t lgr_cnt; 49 wait_queue_head_t lgrs_deleted; 50 u8 going_away : 1; 51 }; 52 53 #endif /* _SMC_H */ 54