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 smcd_dev; 32 33int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev); 34void smc_ism_set_conn(struct smc_connection *conn); 35void smc_ism_unset_conn(struct smc_connection *conn); 36int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id); 37int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id); 38int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size, 39 struct smc_buf_desc *dmb_desc); 40int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc); 41int smc_ism_signal_shutdown(struct smc_link_group *lgr); 42void smc_ism_get_system_eid(u8 **eid); 43u16 smc_ism_get_chid(struct smcd_dev *dev); 44bool smc_ism_is_v2_capable(void); 45int smc_ism_init(void); 46void smc_ism_exit(void); 47int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb); 48 49static inline int smc_ism_write(struct smcd_dev *smcd, u64 dmb_tok, 50 unsigned int idx, bool sf, unsigned int offset, 51 void *data, size_t len) 52{ 53 int rc; 54 55 rc = smcd->ops->move_data(smcd, dmb_tok, idx, sf, offset, data, len); 56 return rc < 0 ? rc : 0; 57} 58 59#endif 60