1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* Shared Memory Communications Direct over ISM devices (SMC-D) 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SMC-D ISM device structure definitions. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Copyright IBM Corp. 2018 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef SMCD_ISM_H 10*4882a593Smuzhiyun #define SMCD_ISM_H 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <linux/uio.h> 13*4882a593Smuzhiyun #include <linux/mutex.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include "smc.h" 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun struct smcd_dev_list { /* List of SMCD devices */ 18*4882a593Smuzhiyun struct list_head list; 19*4882a593Smuzhiyun struct mutex mutex; /* Protects list of devices */ 20*4882a593Smuzhiyun }; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */ 23*4882a593Smuzhiyun extern bool smc_ism_v2_capable; /* HW supports ISM V2 and thus 24*4882a593Smuzhiyun * System EID is defined 25*4882a593Smuzhiyun */ 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun struct smc_ism_vlanid { /* VLAN id set on ISM device */ 28*4882a593Smuzhiyun struct list_head list; 29*4882a593Smuzhiyun unsigned short vlanid; /* Vlan id */ 30*4882a593Smuzhiyun refcount_t refcnt; /* Reference count */ 31*4882a593Smuzhiyun }; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun struct smc_ism_position { /* ISM device position to write to */ 34*4882a593Smuzhiyun u64 token; /* Token of DMB */ 35*4882a593Smuzhiyun u32 offset; /* Offset into DMBE */ 36*4882a593Smuzhiyun u8 index; /* Index of DMBE */ 37*4882a593Smuzhiyun u8 signal; /* Generate interrupt on owner side */ 38*4882a593Smuzhiyun }; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun struct smcd_dev; 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev); 43*4882a593Smuzhiyun void smc_ism_set_conn(struct smc_connection *conn); 44*4882a593Smuzhiyun void smc_ism_unset_conn(struct smc_connection *conn); 45*4882a593Smuzhiyun int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id); 46*4882a593Smuzhiyun int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id); 47*4882a593Smuzhiyun int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size, 48*4882a593Smuzhiyun struct smc_buf_desc *dmb_desc); 49*4882a593Smuzhiyun int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc); 50*4882a593Smuzhiyun int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos, 51*4882a593Smuzhiyun void *data, size_t len); 52*4882a593Smuzhiyun int smc_ism_signal_shutdown(struct smc_link_group *lgr); 53*4882a593Smuzhiyun void smc_ism_get_system_eid(struct smcd_dev *dev, u8 **eid); 54*4882a593Smuzhiyun u16 smc_ism_get_chid(struct smcd_dev *dev); 55*4882a593Smuzhiyun void smc_ism_init(void); 56*4882a593Smuzhiyun #endif 57