| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Shared Memory Communications over RDMA (SMC-R) and RoCE |
| * |
| * Definitions for IB environment |
| * |
| * Copyright IBM Corp. 2016 |
| * |
| * Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com> |
| */ |
| |
| #ifndef _SMC_IB_H |
| #define _SMC_IB_H |
| |
| #include <linux/interrupt.h> |
| #include <linux/if_ether.h> |
| #include <linux/mutex.h> |
| #include <linux/wait.h> |
| #include <rdma/ib_verbs.h> |
| #include <net/smc.h> |
| |
| #define SMC_MAX_PORTS 2 /* Max # of ports */ |
| #define SMC_GID_SIZE sizeof(union ib_gid) |
| |
| #define SMC_IB_MAX_SEND_SGE 2 |
| |
| struct smc_ib_devices { /* list of smc ib devices definition */ |
| struct list_head list; |
| struct mutex mutex; /* protects list of smc ib devices */ |
| }; |
| |
| extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */ |
| extern struct smc_lgr_list smc_lgr_list; /* list of linkgroups */ |
| |
| struct smc_ib_device { /* ib-device infos for smc */ |
| struct list_head list; |
| struct ib_device *ibdev; |
| struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */ |
| struct ib_event_handler event_handler; /* global ib_event handler */ |
| struct ib_cq *roce_cq_send; /* send completion queue */ |
| struct ib_cq *roce_cq_recv; /* recv completion queue */ |
| struct tasklet_struct send_tasklet; /* called by send cq handler */ |
| struct tasklet_struct recv_tasklet; /* called by recv cq handler */ |
| char mac[SMC_MAX_PORTS][ETH_ALEN]; |
| /* mac address per port*/ |
| u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN]; |
| /* pnetid per port */ |
| bool pnetid_by_user[SMC_MAX_PORTS]; |
| /* pnetid defined by user? */ |
| u8 initialized : 1; /* ib dev CQ, evthdl done */ |
| struct work_struct port_event_work; |
| unsigned long port_event_mask; |
| DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS); |
| atomic_t lnk_cnt; /* number of links on ibdev */ |
| wait_queue_head_t lnks_deleted; /* wait 4 removal of all links*/ |
| struct mutex mutex; /* protect dev setup+cleanup */ |
| atomic_t lnk_cnt_by_port[SMC_MAX_PORTS]; |
| /* number of links per port */ |
| int ndev_ifidx[SMC_MAX_PORTS]; /* ndev if indexes */ |
| }; |
| |
| static inline __be32 smc_ib_gid_to_ipv4(u8 gid[SMC_GID_SIZE]) |
| { |
| struct in6_addr *addr6 = (struct in6_addr *)gid; |
| |
| if (ipv6_addr_v4mapped(addr6) || |
| !(addr6->s6_addr32[0] | addr6->s6_addr32[1] | addr6->s6_addr32[2])) |
| return addr6->s6_addr32[3]; |
| return cpu_to_be32(INADDR_NONE); |
| } |
| |
| static inline struct net *smc_ib_net(struct smc_ib_device *smcibdev) |
| { |
| if (smcibdev && smcibdev->ibdev) |
| return read_pnet(&smcibdev->ibdev->coredev.rdma_net); |
| return NULL; |
| } |
| |
| struct smc_init_info_smcrv2; |
| struct smc_buf_desc; |
| struct smc_link; |
| |
| void smc_ib_ndev_change(struct net_device *ndev, unsigned long event); |
| int smc_ib_register_client(void) __init; |
| void smc_ib_unregister_client(void); |
| bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport); |
| int smc_ib_buf_map_sg(struct smc_link *lnk, |
| struct smc_buf_desc *buf_slot, |
| enum dma_data_direction data_direction); |
| void smc_ib_buf_unmap_sg(struct smc_link *lnk, |
| struct smc_buf_desc *buf_slot, |
| enum dma_data_direction data_direction); |
| void smc_ib_dealloc_protection_domain(struct smc_link *lnk); |
| int smc_ib_create_protection_domain(struct smc_link *lnk); |
| void smc_ib_destroy_queue_pair(struct smc_link *lnk); |
| int smc_ib_create_queue_pair(struct smc_link *lnk); |
| int smc_ib_ready_link(struct smc_link *lnk); |
| int smc_ib_modify_qp_rts(struct smc_link *lnk); |
| int smc_ib_modify_qp_error(struct smc_link *lnk); |
| long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev); |
| int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, |
| struct smc_buf_desc *buf_slot, u8 link_idx); |
| void smc_ib_put_memory_region(struct ib_mr *mr); |
| bool smc_ib_is_sg_need_sync(struct smc_link *lnk, |
| struct smc_buf_desc *buf_slot); |
| void smc_ib_sync_sg_for_cpu(struct smc_link *lnk, |
| struct smc_buf_desc *buf_slot, |
| enum dma_data_direction data_direction); |
| void smc_ib_sync_sg_for_device(struct smc_link *lnk, |
| struct smc_buf_desc *buf_slot, |
| enum dma_data_direction data_direction); |
| int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, |
| unsigned short vlan_id, u8 gid[], u8 *sgid_index, |
| struct smc_init_info_smcrv2 *smcrv2); |
| int smc_ib_find_route(__be32 saddr, __be32 daddr, |
| u8 nexthop_mac[], u8 *uses_gateway); |
| bool smc_ib_is_valid_local_systemid(void); |
| int smcr_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb); |
| #endif |