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 #include "linux/ism.h" 20 21 struct sock; 22 23 #define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */ 24 25 struct smc_hashinfo { 26 rwlock_t lock; 27 struct hlist_head ht; 28 }; 29 30 /* SMCD/ISM device driver interface */ 31 struct smcd_dmb { 32 u64 dmb_tok; 33 u64 rgid; 34 u32 dmb_len; 35 u32 sba_idx; 36 u32 vlan_valid; 37 u32 vlan_id; 38 void *cpu_addr; 39 dma_addr_t dma_addr; 40 }; 41 42 #define ISM_EVENT_DMB 0 43 #define ISM_EVENT_GID 1 44 #define ISM_EVENT_SWR 2 45 46 #define ISM_RESERVED_VLANID 0x1FFF 47 48 struct smcd_dev; 49 50 struct smcd_gid { 51 u64 gid; 52 u64 gid_ext; 53 }; 54 55 struct smcd_ops { 56 int (*query_remote_gid)(struct smcd_dev *dev, struct smcd_gid *rgid, 57 u32 vid_valid, u32 vid); 58 int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb, 59 void *client); 60 int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 61 int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx, 62 bool sf, unsigned int offset, void *data, 63 unsigned int size); 64 int (*supports_v2)(void); 65 66 /* optional operations */ 67 int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 68 int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id); 69 int (*set_vlan_required)(struct smcd_dev *dev); 70 int (*reset_vlan_required)(struct smcd_dev *dev); 71 int (*signal_event)(struct smcd_dev *dev, struct smcd_gid *rgid, 72 u32 trigger_irq, u32 event_code, u64 info); 73 int (*support_dmb_nocopy)(struct smcd_dev *dev); 74 int (*attach_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb); 75 int (*detach_dmb)(struct smcd_dev *dev, u64 token); 76 }; 77 78 struct smcd_dev { 79 const struct smcd_ops *ops; 80 void *priv; 81 void *client; 82 struct dibs_dev *dibs; 83 struct list_head list; 84 spinlock_t lock; 85 struct smc_connection **conn; 86 struct list_head vlan; 87 struct workqueue_struct *event_wq; 88 u8 pnetid[SMC_MAX_PNETID_LEN]; 89 bool pnetid_by_user; 90 struct list_head lgr_list; 91 spinlock_t lgr_lock; 92 atomic_t lgr_cnt; 93 wait_queue_head_t lgrs_deleted; 94 u8 going_away : 1; 95 }; 96 97 #endif /* _SMC_H */ 98