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#include <linux/types.h>
  14#include <linux/mutex.h>
  15
  16#include "smc.h"
  17
  18struct smcd_dev_list {  /* List of SMCD devices */
  19        struct list_head list;
  20        struct mutex mutex;     /* Protects list of devices */
  21};
  22
  23extern struct smcd_dev_list     smcd_dev_list;  /* list of smcd devices */
  24
  25struct 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
  31struct smc_ism_position {       /* ISM device position to write to */
  32        u64 token;              /* Token of DMB */
  33        u32 offset;             /* Offset into DMBE */
  34        u8 index;               /* Index of DMBE */
  35        u8 signal;              /* Generate interrupt on owner side */
  36};
  37
  38struct smcd_dev;
  39
  40int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
  41void smc_ism_set_conn(struct smc_connection *conn);
  42void smc_ism_unset_conn(struct smc_connection *conn);
  43int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
  44int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
  45int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
  46                         struct smc_buf_desc *dmb_desc);
  47int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
  48int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
  49                  void *data, size_t len);
  50int smc_ism_signal_shutdown(struct smc_link_group *lgr);
  51void smc_ism_get_system_eid(struct smcd_dev *dev, u8 **eid);
  52u16 smc_ism_get_chid(struct smcd_dev *dev);
  53bool smc_ism_is_v2_capable(void);
  54void smc_ism_init(void);
  55int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
  56#endif
  57