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 19 struct sock; 20 21 #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ 22 23 struct smc_hashinfo { 24 rwlock_t lock; 25 struct hlist_head ht; 26 }; 27 28 int smc_hash_sk(struct sock *sk); 29 void smc_unhash_sk(struct sock *sk); 30 31 /* SMCD/ISM device driver interface */ 32 struct smcd_dmb { 33 u64 dmb_tok; 34 u64 rgid; 35 u32 dmb_len; 36 u32 sba_idx; 37 u32 vlan_valid; 38 u32 vlan_id; 39 void *cpu_addr; 40 dma_addr_t dma_addr; 41 }; 42 43 #define ISM_EVENT_DMB 0 44 #define ISM_EVENT_GID 1 45 #define ISM_EVENT_SWR 2 46 47 #define ISM_RESERVED_VLANID 0x1FFF 48 49 #define ISM_ERROR 0xFFFF 50 51 struct smcd_event { 52 u32 type; 53 u32 code; 54 u64 tok; 55 u64 time; 56 u64 info; 57 }; 58 59 struct smcd_dev; 60 61 struct smcd_ops { 62 int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid, 63 u32 vid); 64 int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 65 int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 66 int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 67 int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 68 int (*set_vlan_required)(struct smcd_dev *dev); 69 int (*reset_vlan_required)(struct smcd_dev *dev); 70 int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq, 71 u32 event_code, u64 info); 72 int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, 73 bool sf, unsigned int offset, void *data, 74 unsigned int size); 75 u8* (*get_system_eid)(void); 76 u16 (*get_chid)(struct smcd_dev *dev); 77 }; 78 79 struct smcd_dev { 80 const struct smcd_ops *ops; 81 struct device dev; 82 void *priv; 83 u64 local_gid; 84 struct list_head list; 85 spinlock_t lock; 86 struct smc_connection **conn; 87 struct list_head vlan; 88 struct workqueue_struct *event_wq; 89 u8 pnetid[SMC_MAX_PNETID_LEN]; 90 bool pnetid_by_user; 91 struct list_head lgr_list; 92 spinlock_t lgr_lock; 93 atomic_t lgr_cnt; 94 wait_queue_head_t lgrs_deleted; 95 u8 going_away : 1; 96 }; 97 98 struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name, 99 const struct smcd_ops *ops, int max_dmbs); 100 int smcd_register_dev(struct smcd_dev *smcd); 101 void smcd_unregister_dev(struct smcd_dev *smcd); 102 void smcd_free_dev(struct smcd_dev *smcd); 103 void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event); 104 void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit, u16 dmbemask); 105 #endif /* _SMC_H */ 106