diff options
Diffstat (limited to 'net/smc/smc_ib.h')
| -rw-r--r-- | net/smc/smc_ib.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h new file mode 100644 index 0000000000..ef8ac2b754 --- /dev/null +++ b/net/smc/smc_ib.h @@ -0,0 +1,119 @@ +/* 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(struct net *net, __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 |