net/smc/smc_ism.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Shared Memory Communications Direct over ISM devices (SMC-D)
   3  *
   4  * SMC-D ISM device structure definitions.
   5  *
   6  * Copyright IBM Corp. 2018
   7  */
   8
   9 #ifndef SMCD_ISM_H
  10 #define SMCD_ISM_H
  11
  12 #include <linux/uio.h>
  13 #include <linux/types.h>
  14 #include <linux/mutex.h>
  15
  16 #include "smc.h"
  17
  18 struct smcd_dev_list {  /* List of SMCD devices */
  19         struct list_head list;
  20         struct mutex mutex;     /* Protects list of devices */
  21 };
  22
  23 extern struct smcd_dev_list     smcd_dev_list;  /* list of smcd devices */
  24
  25 struct smc_ism_vlanid {                 /* VLAN id set on ISM device */
  26         struct list_head list;
  27         unsigned short vlanid;          /* Vlan id */
  28         refcount_t refcnt;              /* Reference count */
  29 };
  30
  31 struct smcd_dev;
  32
  33 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
  34 void smc_ism_set_conn(struct smc_connection *conn);
  35 void smc_ism_unset_conn(struct smc_connection *conn);
  36 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
  37 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
  38 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
  39                          struct smc_buf_desc *dmb_desc);
  40 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
  41 int smc_ism_signal_shutdown(struct smc_link_group *lgr);
  42 void smc_ism_get_system_eid(u8 **eid);
  43 u16 smc_ism_get_chid(struct smcd_dev *dev);
  44 bool smc_ism_is_v2_capable(void);
  45 void smc_ism_init(void);
  46 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
  47
  48 static inline int smc_ism_write(struct smcd_dev *smcd, u64 dmb_tok,
  49                                 unsigned int idx, bool sf, unsigned int offset,
  50                                 void *data, size_t len)
  51 {
  52         int rc;
  53
  54         rc = smcd->ops->move_data(smcd, dmb_tok, idx, sf, offset, data, len);
  55         return rc < 0 ? rc : 0;
  56 }
  57
  58 #endif