LXR linux/include/net/smc.h

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