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 int smc_ism_init(void); 46 void smc_ism_exit(void); 47 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb); 48 49 static 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