1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Shared Memory Communications over RDMA (SMC-R) and RoCE 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Definitions for the SMC module (socket related) 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Copyright IBM Corp. 2016 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun #ifndef _SMC_H 12*4882a593Smuzhiyun #define _SMC_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun struct smc_hashinfo { 17*4882a593Smuzhiyun rwlock_t lock; 18*4882a593Smuzhiyun struct hlist_head ht; 19*4882a593Smuzhiyun }; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun int smc_hash_sk(struct sock *sk); 22*4882a593Smuzhiyun void smc_unhash_sk(struct sock *sk); 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun /* SMCD/ISM device driver interface */ 25*4882a593Smuzhiyun struct smcd_dmb { 26*4882a593Smuzhiyun u64 dmb_tok; 27*4882a593Smuzhiyun u64 rgid; 28*4882a593Smuzhiyun u32 dmb_len; 29*4882a593Smuzhiyun u32 sba_idx; 30*4882a593Smuzhiyun u32 vlan_valid; 31*4882a593Smuzhiyun u32 vlan_id; 32*4882a593Smuzhiyun void *cpu_addr; 33*4882a593Smuzhiyun dma_addr_t dma_addr; 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #define ISM_EVENT_DMB 0 37*4882a593Smuzhiyun #define ISM_EVENT_GID 1 38*4882a593Smuzhiyun #define ISM_EVENT_SWR 2 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #define ISM_RESERVED_VLANID 0x1FFF 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #define ISM_ERROR 0xFFFF 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun struct smcd_event { 45*4882a593Smuzhiyun u32 type; 46*4882a593Smuzhiyun u32 code; 47*4882a593Smuzhiyun u64 tok; 48*4882a593Smuzhiyun u64 time; 49*4882a593Smuzhiyun u64 info; 50*4882a593Smuzhiyun }; 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun struct smcd_dev; 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun struct smcd_ops { 55*4882a593Smuzhiyun int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid, 56*4882a593Smuzhiyun u32 vid); 57*4882a593Smuzhiyun int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 58*4882a593Smuzhiyun int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 59*4882a593Smuzhiyun int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 60*4882a593Smuzhiyun int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 61*4882a593Smuzhiyun int (*set_vlan_required)(struct smcd_dev *dev); 62*4882a593Smuzhiyun int (*reset_vlan_required)(struct smcd_dev *dev); 63*4882a593Smuzhiyun int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq, 64*4882a593Smuzhiyun u32 event_code, u64 info); 65*4882a593Smuzhiyun int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, 66*4882a593Smuzhiyun bool sf, unsigned int offset, void *data, 67*4882a593Smuzhiyun unsigned int size); 68*4882a593Smuzhiyun void (*get_system_eid)(struct smcd_dev *dev, u8 **eid); 69*4882a593Smuzhiyun u16 (*get_chid)(struct smcd_dev *dev); 70*4882a593Smuzhiyun }; 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun struct smcd_dev { 73*4882a593Smuzhiyun const struct smcd_ops *ops; 74*4882a593Smuzhiyun struct device dev; 75*4882a593Smuzhiyun void *priv; 76*4882a593Smuzhiyun u64 local_gid; 77*4882a593Smuzhiyun struct list_head list; 78*4882a593Smuzhiyun spinlock_t lock; 79*4882a593Smuzhiyun struct smc_connection **conn; 80*4882a593Smuzhiyun struct list_head vlan; 81*4882a593Smuzhiyun struct workqueue_struct *event_wq; 82*4882a593Smuzhiyun u8 pnetid[SMC_MAX_PNETID_LEN]; 83*4882a593Smuzhiyun bool pnetid_by_user; 84*4882a593Smuzhiyun struct list_head lgr_list; 85*4882a593Smuzhiyun spinlock_t lgr_lock; 86*4882a593Smuzhiyun atomic_t lgr_cnt; 87*4882a593Smuzhiyun wait_queue_head_t lgrs_deleted; 88*4882a593Smuzhiyun u8 going_away : 1; 89*4882a593Smuzhiyun }; 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, 92*4882a593Smuzhiyun const struct smcd_ops *ops, int max_dmbs); 93*4882a593Smuzhiyun int smcd_register_dev(struct smcd_dev *smcd); 94*4882a593Smuzhiyun void smcd_unregister_dev(struct smcd_dev *smcd); 95*4882a593Smuzhiyun void smcd_free_dev(struct smcd_dev *smcd); 96*4882a593Smuzhiyun void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event); 97*4882a593Smuzhiyun void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit); 98*4882a593Smuzhiyun #endif /* _SMC_H */ 99