LXR linux/net/smc/smc

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
   4 *
   5 *  Definitions for IB environment
   6 *
   7 *  Copyright IBM Corp. 2016
   8 *
   9 *  Author(s):  Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
  10 */
  11
  12#ifndef _SMC_IB_H
  13#define _SMC_IB_H
  14
  15#include <linux/interrupt.h>
  16#include <linux/if_ether.h>
  17#include <rdma/ib_verbs.h>
  18
  19#define SMC_MAX_PORTS                   2       /* Max # of ports */
  20#define SMC_GID_SIZE                    sizeof(union ib_gid)
  21
  22#define SMC_IB_MAX_SEND_SGE             2
  23
  24struct smc_ib_devices {                 /* list of smc ib devices definition */
  25        struct list_head        list;
  26        spinlock_t              lock;   /* protects list of smc ib devices */
  27};
  28
  29extern struct smc_ib_devices    smc_ib_devices; /* list of smc ib devices */
  30
  31struct smc_ib_device {                          /* ib-device infos for smc */
  32        struct list_head        list;
  33        struct ib_device        *ibdev;
  34        struct ib_port_attr     pattr[SMC_MAX_PORTS];   /* ib dev. port attrs */
  35        struct ib_event_handler event_handler;  /* global ib_event handler */
  36        struct ib_cq            *roce_cq_send;  /* send completion queue */
  37        struct ib_cq            *roce_cq_recv;  /* recv completion queue */
  38        struct tasklet_struct   send_tasklet;   /* called by send cq handler */
  39        struct tasklet_struct   recv_tasklet;   /* called by recv cq handler */
  40        char                    mac[SMC_MAX_PORTS][ETH_ALEN];
  41                                                /* mac address per port*/
  42        union ib_gid            gid[SMC_MAX_PORTS]; /* gid per port */
  43        u8                      initialized : 1; /* ib dev CQ, evthdl done */
  44        struct work_struct      port_event_work;
  45        unsigned long           port_event_mask;
  46};
  47
  48struct smc_buf_desc;
  49struct smc_link;
  50
  51int smc_ib_register_client(void) __init;
  52void smc_ib_unregister_client(void);
  53bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
  54int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport);
  55int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev,
  56                      struct smc_buf_desc *buf_slot,
  57                      enum dma_data_direction data_direction);
  58void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev,
  59                         struct smc_buf_desc *buf_slot,
  60                         enum dma_data_direction data_direction);
  61void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
  62int smc_ib_create_protection_domain(struct smc_link *lnk);
  63void smc_ib_destroy_queue_pair(struct smc_link *lnk);
  64int smc_ib_create_queue_pair(struct smc_link *lnk);
  65int smc_ib_ready_link(struct smc_link *lnk);
  66int smc_ib_modify_qp_rts(struct smc_link *lnk);
  67int smc_ib_modify_qp_reset(struct smc_link *lnk);
  68long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
  69int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
  70                             struct smc_buf_desc *buf_slot);
  71void smc_ib_put_memory_region(struct ib_mr *mr);
  72void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev,
  73                            struct smc_buf_desc *buf_slot,
  74                            enum dma_data_direction data_direction);
  75void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
  76                               struct smc_buf_desc *buf_slot,
  77                               enum dma_data_direction data_direction);
  78#endif
  79