net/smc/smc_ib.h

   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
  23 struct 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
  28 extern struct smc_ib_devices    smc_ib_devices; /* list of smc ib devices */
  29
  30 struct 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
  47 struct smc_buf_desc;
  48 struct smc_link;
  49
  50 int smc_ib_register_client(void) __init;
  51 void smc_ib_unregister_client(void);
  52 bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
  53 int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport);
  54 int 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);
  57 void 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);
  60 void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
  61 int smc_ib_create_protection_domain(struct smc_link *lnk);
  62 void smc_ib_destroy_queue_pair(struct smc_link *lnk);
  63 int smc_ib_create_queue_pair(struct smc_link *lnk);
  64 int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
  65                              struct ib_mr **mr);
  66 int smc_ib_ready_link(struct smc_link *lnk);
  67 int smc_ib_modify_qp_rts(struct smc_link *lnk);
  68 int smc_ib_modify_qp_reset(struct smc_link *lnk);
  69 long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
  70
  71
  72 #endif