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/*
* 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 <rdma/ib_verbs.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;
spinlock_t lock; /* protects list of smc ib devices */
};
extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */
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_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][6]; /* mac address per port*/
union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */
u8 initialized : 1; /* ib dev CQ, evthdl done */
};
struct smc_buf_desc;
struct smc_link;
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_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport);
int smc_ib_buf_map(struct smc_ib_device *smcibdev, int buf_size,
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);
#endif
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