1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Shared Memory Communications over RDMA (SMC-R) and RoCE 4 * 5 * Definitions for IB environment 6 * 7 * Copyright IBM Corp. 2016 8 * 9 * Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com> 10 */ 11 12 #ifndef _SMC_IB_H 13 #define _SMC_IB_H 14 15 #include <linux/interrupt.h> 16 #include <linux/if_ether.h> 17 #include <rdma/ib_verbs.h> 18 19 #define SMC_MAX_PORTS 2 /* Max # of ports */ 20 #define SMC_GID_SIZE sizeof(union ib_gid) 21 22 #define SMC_IB_MAX_SEND_SGE 2 23 24 struct smc_ib_devices { /* list of smc ib devices definition */ 25 struct list_head list; 26 spinlock_t lock; /* protects list of smc ib devices */ 27 }; 28 29 extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */ 30 31 struct smc_ib_device { /* ib-device infos for smc */ 32 struct list_head list; 33 struct ib_device *ibdev; 34 struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */ 35 struct ib_event_handler event_handler; /* global ib_event handler */ 36 struct ib_cq *roce_cq_send; /* send completion queue */ 37 struct ib_cq *roce_cq_recv; /* recv completion queue */ 38 struct tasklet_struct send_tasklet; /* called by send cq handler */ 39 struct tasklet_struct recv_tasklet; /* called by recv cq handler */ 40 char mac[SMC_MAX_PORTS][ETH_ALEN]; 41 /* mac address per port*/ 42 union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */ 43 u8 initialized : 1; /* ib dev CQ, evthdl done */ 44 struct work_struct port_event_work; 45 unsigned long port_event_mask; 46 }; 47 48 struct smc_buf_desc; 49 struct smc_link; 50 51 int smc_ib_register_client(void) __init; 52 void smc_ib_unregister_client(void); 53 bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport); 54 int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport); 55 int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev, 56 struct smc_buf_desc *buf_slot, 57 enum dma_data_direction data_direction); 58 void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev, 59 struct smc_buf_desc *buf_slot, 60 enum dma_data_direction data_direction); 61 void smc_ib_dealloc_protection_domain(struct smc_link *lnk); 62 int smc_ib_create_protection_domain(struct smc_link *lnk); 63 void smc_ib_destroy_queue_pair(struct smc_link *lnk); 64 int smc_ib_create_queue_pair(struct smc_link *lnk); 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 int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, 70 struct smc_buf_desc *buf_slot); 71 void smc_ib_put_memory_region(struct ib_mr *mr); 72 void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev, 73 struct smc_buf_desc *buf_slot, 74 enum dma_data_direction data_direction); 75 void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev, 76 struct smc_buf_desc *buf_slot, 77 enum dma_data_direction data_direction); 78 #endif 79