1c6ba7c9bSHans Wippel /* SPDX-License-Identifier: GPL-2.0 */ 2c6ba7c9bSHans Wippel /* Shared Memory Communications Direct over ISM devices (SMC-D) 3c6ba7c9bSHans Wippel * 4c6ba7c9bSHans Wippel * SMC-D ISM device structure definitions. 5c6ba7c9bSHans Wippel * 6c6ba7c9bSHans Wippel * Copyright IBM Corp. 2018 7c6ba7c9bSHans Wippel */ 8c6ba7c9bSHans Wippel 9c6ba7c9bSHans Wippel #ifndef SMCD_ISM_H 10c6ba7c9bSHans Wippel #define SMCD_ISM_H 11c6ba7c9bSHans Wippel 12c6ba7c9bSHans Wippel #include <linux/uio.h> 1349407ae2SGuvenc Gulce #include <linux/types.h> 1482087c03SUrsula Braun #include <linux/mutex.h> 15c6ba7c9bSHans Wippel 16c6ba7c9bSHans Wippel #include "smc.h" 17c6ba7c9bSHans Wippel 18c6ba7c9bSHans Wippel struct smcd_dev_list { /* List of SMCD devices */ 19c6ba7c9bSHans Wippel struct list_head list; 2082087c03SUrsula Braun struct mutex mutex; /* Protects list of devices */ 21c6ba7c9bSHans Wippel }; 22c6ba7c9bSHans Wippel 23c6ba7c9bSHans Wippel extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */ 24c6ba7c9bSHans Wippel 25c6ba7c9bSHans Wippel struct smc_ism_vlanid { /* VLAN id set on ISM device */ 26c6ba7c9bSHans Wippel struct list_head list; 27c6ba7c9bSHans Wippel unsigned short vlanid; /* Vlan id */ 28c6ba7c9bSHans Wippel refcount_t refcnt; /* Reference count */ 29c6ba7c9bSHans Wippel }; 30c6ba7c9bSHans Wippel 31c6ba7c9bSHans Wippel struct smc_ism_position { /* ISM device position to write to */ 32c6ba7c9bSHans Wippel u64 token; /* Token of DMB */ 33c6ba7c9bSHans Wippel u32 offset; /* Offset into DMBE */ 34c6ba7c9bSHans Wippel u8 index; /* Index of DMBE */ 35c6ba7c9bSHans Wippel u8 signal; /* Generate interrupt on owner side */ 36c6ba7c9bSHans Wippel }; 37c6ba7c9bSHans Wippel 38c6ba7c9bSHans Wippel struct smcd_dev; 39c6ba7c9bSHans Wippel 40c6ba7c9bSHans Wippel int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev); 41c6ba7c9bSHans Wippel void smc_ism_set_conn(struct smc_connection *conn); 42c6ba7c9bSHans Wippel void smc_ism_unset_conn(struct smc_connection *conn); 43c6ba7c9bSHans Wippel int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id); 44c6ba7c9bSHans Wippel int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id); 45c6ba7c9bSHans Wippel int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size, 46c6ba7c9bSHans Wippel struct smc_buf_desc *dmb_desc); 47c6ba7c9bSHans Wippel int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc); 48c6ba7c9bSHans Wippel int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos, 49c6ba7c9bSHans Wippel void *data, size_t len); 500512f69eSHans Wippel int smc_ism_signal_shutdown(struct smc_link_group *lgr); 51201091ebSUrsula Braun void smc_ism_get_system_eid(struct smcd_dev *dev, u8 **eid); 528caaccf5SUrsula Braun u16 smc_ism_get_chid(struct smcd_dev *dev); 5349407ae2SGuvenc Gulce bool smc_ism_is_v2_capable(void); 54201091ebSUrsula Braun void smc_ism_init(void); 55*aaf95523SGuvenc Gulce int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb); 56c6ba7c9bSHans Wippel #endif 57