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 #include <net/smc.h> 19 20 #define SMC_MAX_PORTS 2 /* Max # of ports */ 21 #define SMC_GID_SIZE sizeof(union ib_gid) 22 23 #define SMC_IB_MAX_SEND_SGE 2 24 25 struct smc_ib_devices { /* list of smc ib devices definition */ 26 struct list_head list; 27 spinlock_t lock; /* protects list of smc ib devices */ 28 }; 29 30 extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */ 31 32 struct smc_ib_device { /* ib-device infos for smc */ 33 struct list_head list; 34 struct ib_device *ibdev; 35 struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */ 36 struct ib_event_handler event_handler; /* global ib_event handler */ 37 struct ib_cq *roce_cq_send; /* send completion queue */ 38 struct ib_cq *roce_cq_recv; /* recv completion queue */ 39 struct tasklet_struct send_tasklet; /* called by send cq handler */ 40 struct tasklet_struct recv_tasklet; /* called by recv cq handler */ 41 char mac[SMC_MAX_PORTS][ETH_ALEN]; 42 /* mac address per port*/ 43 u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN]; 44 /* pnetid per port */ 45 bool pnetid_by_user[SMC_MAX_PORTS]; 46 /* pnetid defined by user? */ 47 u8 initialized : 1; /* ib dev CQ, evthdl done */ 48 struct work_struct port_event_work; 49 unsigned long port_event_mask; 50 }; 51 52 struct smc_buf_desc; 53 struct smc_link; 54 55 int smc_ib_register_client(void) __init; 56 void smc_ib_unregister_client(void); 57 bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport); 58 int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev, 59 struct smc_buf_desc *buf_slot, 60 enum dma_data_direction data_direction); 61 void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev, 62 struct smc_buf_desc *buf_slot, 63 enum dma_data_direction data_direction); 64 void smc_ib_dealloc_protection_domain(struct smc_link *lnk); 65 int smc_ib_create_protection_domain(struct smc_link *lnk); 66 void smc_ib_destroy_queue_pair(struct smc_link *lnk); 67 int smc_ib_create_queue_pair(struct smc_link *lnk); 68 int smc_ib_ready_link(struct smc_link *lnk); 69 int smc_ib_modify_qp_rts(struct smc_link *lnk); 70 int smc_ib_modify_qp_reset(struct smc_link *lnk); 71 long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev); 72 int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, 73 struct smc_buf_desc *buf_slot); 74 void smc_ib_put_memory_region(struct ib_mr *mr); 75 void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev, 76 struct smc_buf_desc *buf_slot, 77 enum dma_data_direction data_direction); 78 void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev, 79 struct smc_buf_desc *buf_slot, 80 enum dma_data_direction data_direction); 81 int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, 82 unsigned short vlan_id, u8 gid[], u8 *sgid_index); 83 #endif 84