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/* 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
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