LXR linux/net/smc/smc

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