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/ism.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 int smc_hash_sk(struct sock *sk); 30 void smc_unhash_sk(struct sock *sk); 31 32 /* SMCD/ISM device driver interface */ 33 struct smcd_dmb { 34 u64 dmb_tok; 35 u64 rgid; 36 u32 dmb_len; 37 u32 sba_idx; 38 u32 vlan_valid; 39 u32 vlan_id; 40 void *cpu_addr; 41 dma_addr_t dma_addr; 42 }; 43 44 #define ISM_EVENT_DMB 0 45 #define ISM_EVENT_GID 1 46 #define ISM_EVENT_SWR 2 47 48 #define ISM_RESERVED_VLANID 0x1FFF 49 50 #define ISM_ERROR 0xFFFF 51 52 struct smcd_dev; 53 struct ism_client; 54 55 struct smcd_gid { 56 u64 gid; 57 u64 gid_ext; 58 }; 59 60 struct smcd_ops { 61 int (*query_remote_gid)(struct smcd_dev *dev, struct smcd_gid *rgid, 62 u32 vid_valid, u32 vid); 63 int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb, 64 struct ism_client *client); 65 int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 66 int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, 67 bool sf, unsigned int offset, void *data, 68 unsigned int size); 69 int (*supports_v2)(void); 70 u8* (*get_system_eid)(void); 71 void (*get_local_gid)(struct smcd_dev *dev, struct smcd_gid *gid); 72 u16 (*get_chid)(struct smcd_dev *dev); 73 struct device* (*get_dev)(struct smcd_dev *dev); 74 75 /* optional operations */ 76 int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 77 int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 78 int (*set_vlan_required)(struct smcd_dev *dev); 79 int (*reset_vlan_required)(struct smcd_dev *dev); 80 int (*signal_event)(struct smcd_dev *dev, struct smcd_gid *rgid, 81 u32 trigger_irq, u32 event_code, u64 info); 82 int (*support_dmb_nocopy)(struct smcd_dev *dev); 83 int (*attach_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 84 int (*detach_dmb)(struct smcd_dev *dev, u64 token); 85 }; 86 87 struct smcd_dev { 88 const struct smcd_ops *ops; 89 void *priv; 90 struct list_head list; 91 spinlock_t lock; 92 struct smc_connection **conn; 93 struct list_head vlan; 94 struct workqueue_struct *event_wq; 95 u8 pnetid[SMC_MAX_PNETID_LEN]; 96 bool pnetid_by_user; 97 struct list_head lgr_list; 98 spinlock_t lgr_lock; 99 atomic_t lgr_cnt; 100 wait_queue_head_t lgrs_deleted; 101 u8 going_away : 1; 102 }; 103 104 #endif /* _SMC_H */ 105