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