LXR linux/net/smc/smc

   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
  14#include "smc.h"
  15
  16struct smcd_dev_list {  /* List of SMCD devices */
  17        struct list_head list;
  18        spinlock_t lock;        /* Protects list of devices */
  19};
  20
  21extern struct smcd_dev_list     smcd_dev_list; /* list of smcd devices */
  22
  23struct smc_ism_vlanid {                 /* VLAN id set on ISM device */
  24        struct list_head list;
  25        unsigned short vlanid;          /* Vlan id */
  26        refcount_t refcnt;              /* Reference count */
  27};
  28
  29struct smc_ism_position {       /* ISM device position to write to */
  30        u64 token;              /* Token of DMB */
  31        u32 offset;             /* Offset into DMBE */
  32        u8 index;               /* Index of DMBE */
  33        u8 signal;              /* Generate interrupt on owner side */
  34};
  35
  36struct smcd_dev;
  37
  38int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
  39void smc_ism_set_conn(struct smc_connection *conn);
  40void smc_ism_unset_conn(struct smc_connection *conn);
  41int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
  42int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
  43int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
  44                         struct smc_buf_desc *dmb_desc);
  45int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
  46int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
  47                  void *data, size_t len);
  48int smc_ism_signal_shutdown(struct smc_link_group *lgr);
  49#endif
  50