1 /* 2 * Shared Memory Communications over RDMA (SMC-R) and RoCE 3 * 4 * Definitions for IB environment 5 * 6 * Copyright IBM Corp. 2016 7 * 8 * Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com> 9 */ 10 11 #ifndef _SMC_IB_H 12 #define _SMC_IB_H 13 14 #include <linux/if_ether.h> 15 #include <rdma/ib_verbs.h> 16 17 #define SMC_MAX_PORTS 2 /* Max # of ports */ 18 #define SMC_GID_SIZE sizeof(union ib_gid) 19 20 #define SMC_IB_MAX_SEND_SGE 2 21 22 struct smc_ib_devices { /* list of smc ib devices definition */ 23 struct list_head list; 24 spinlock_t lock; /* protects list of smc ib devices */ 25 }; 26 27 extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */ 28 29 struct smc_ib_device { /* ib-device infos for smc */ 30 struct list_head list; 31 struct ib_device *ibdev; 32 struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */ 33 struct ib_event_handler event_handler; /* global ib_event handler */ 34 struct ib_cq *roce_cq_send; /* send completion queue */ 35 struct ib_cq *roce_cq_recv; /* recv completion queue */ 36 struct tasklet_struct send_tasklet; /* called by send cq handler */ 37 struct tasklet_struct recv_tasklet; /* called by recv cq handler */ 38 char mac[SMC_MAX_PORTS][ETH_ALEN]; 39 /* mac address per port*/ 40 union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */ 41 u8 initialized : 1; /* ib dev CQ, evthdl done */ 42 struct work_struct port_event_work; 43 unsigned long port_event_mask; 44 }; 45 46 struct smc_buf_desc; 47 struct smc_link; 48 49 int smc_ib_register_client(void) __init; 50 void smc_ib_unregister_client(void); 51 bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport); 52 int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport); 53 int smc_ib_buf_map(struct smc_ib_device *smcibdev, int buf_size, 54 struct smc_buf_desc *buf_slot, 55 enum dma_data_direction data_direction); 56 void smc_ib_buf_unmap(struct smc_ib_device *smcibdev, int bufsize, 57 struct smc_buf_desc *buf_slot, 58 enum dma_data_direction data_direction); 59 void smc_ib_dealloc_protection_domain(struct smc_link *lnk); 60 int smc_ib_create_protection_domain(struct smc_link *lnk); 61 void smc_ib_destroy_queue_pair(struct smc_link *lnk); 62 int smc_ib_create_queue_pair(struct smc_link *lnk); 63 int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, 64 struct ib_mr **mr); 65 int smc_ib_ready_link(struct smc_link *lnk); 66 int smc_ib_modify_qp_rts(struct smc_link *lnk); 67 int smc_ib_modify_qp_reset(struct smc_link *lnk); 68 long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev); 69 70 71 #endif 72