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 <linux/mutex.h> 18 #include <linux/wait.h> 19 #include <rdma/ib_verbs.h> 20 #include <net/smc.h> 21 22 #define SMC_MAX_PORTS 2 /* Max # of ports */ 23 #define SMC_GID_SIZE sizeof(union ib_gid) 24 25 #define SMC_IB_MAX_SEND_SGE 2 26 27 struct smc_ib_devices { /* list of smc ib devices definition */ 28 struct list_head list; 29 struct mutex mutex; /* protects list of smc ib devices */ 30 }; 31 32 extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */ 33 34 struct smc_ib_device { /* ib-device infos for smc */ 35 struct list_head list; 36 struct ib_device *ibdev; 37 struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */ 38 struct ib_event_handler event_handler; /* global ib_event handler */ 39 struct ib_cq *roce_cq_send; /* send completion queue */ 40 struct ib_cq *roce_cq_recv; /* recv completion queue */ 41 struct tasklet_struct send_tasklet; /* called by send cq handler */ 42 struct tasklet_struct recv_tasklet; /* called by recv cq handler */ 43 char mac[SMC_MAX_PORTS][ETH_ALEN]; 44 /* mac address per port*/ 45 u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN]; 46 /* pnetid per port */ 47 bool pnetid_by_user[SMC_MAX_PORTS]; 48 /* pnetid defined by user? */ 49 u8 initialized : 1; /* ib dev CQ, evthdl done */ 50 struct work_struct port_event_work; 51 unsigned long port_event_mask; 52 DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS); 53 atomic_t lnk_cnt; /* number of links on ibdev */ 54 wait_queue_head_t lnks_deleted; /* wait 4 removal of all links*/ 55 struct mutex mutex; /* protect dev setup+cleanup */ 56 }; 57 58 struct smc_buf_desc; 59 struct smc_link; 60 61 int smc_ib_register_client(void) __init; 62 void smc_ib_unregister_client(void); 63 bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport); 64 int smc_ib_buf_map_sg(struct smc_link *lnk, 65 struct smc_buf_desc *buf_slot, 66 enum dma_data_direction data_direction); 67 void smc_ib_buf_unmap_sg(struct smc_link *lnk, 68 struct smc_buf_desc *buf_slot, 69 enum dma_data_direction data_direction); 70 void smc_ib_dealloc_protection_domain(struct smc_link *lnk); 71 int smc_ib_create_protection_domain(struct smc_link *lnk); 72 void smc_ib_destroy_queue_pair(struct smc_link *lnk); 73 int smc_ib_create_queue_pair(struct smc_link *lnk); 74 int smc_ib_ready_link(struct smc_link *lnk); 75 int smc_ib_modify_qp_rts(struct smc_link *lnk); 76 int smc_ib_modify_qp_reset(struct smc_link *lnk); 77 long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev); 78 int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, 79 struct smc_buf_desc *buf_slot, u8 link_idx); 80 void smc_ib_put_memory_region(struct ib_mr *mr); 81 void smc_ib_sync_sg_for_cpu(struct smc_link *lnk, 82 struct smc_buf_desc *buf_slot, 83 enum dma_data_direction data_direction); 84 void smc_ib_sync_sg_for_device(struct smc_link *lnk, 85 struct smc_buf_desc *buf_slot, 86 enum dma_data_direction data_direction); 87 int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, 88 unsigned short vlan_id, u8 gid[], u8 *sgid_index); 89 bool smc_ib_is_valid_local_systemid(void); 90 #endif 91