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 16 struct smcd_dev_list { /* List of SMCD devices */ 17 struct list_head list; 18 spinlock_t lock; /* Protects list of devices */ 19 }; 20 21 extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */ 22 23 struct 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 29 struct 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 36 struct smcd_dev; 37 38 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev); 39 void smc_ism_set_conn(struct smc_connection *conn); 40 void smc_ism_unset_conn(struct smc_connection *conn); 41 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id); 42 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id); 43 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size, 44 struct smc_buf_desc *dmb_desc); 45 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc); 46 int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos, 47 void *data, size_t len); 48 int smc_ism_signal_shutdown(struct smc_link_group *lgr); 49 #endif 50