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