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 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 38 struct smcd_dev; 39 40 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev); 41 void smc_ism_set_conn(struct smc_connection *conn); 42 void smc_ism_unset_conn(struct smc_connection *conn); 43 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id); 44 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id); 45 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size, 46 struct smc_buf_desc *dmb_desc); 47 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc); 48 int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos, 49 void *data, size_t len); 50 int smc_ism_signal_shutdown(struct smc_link_group *lgr); 51 void smc_ism_get_system_eid(u8 **eid); 52 u16 smc_ism_get_chid(struct smcd_dev *dev); 53 bool smc_ism_is_v2_capable(void); 54 void smc_ism_init(void); 55 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb); 56 #endif 57