net/smc/smc_llc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  Shared Memory Communications over RDMA (SMC-R) and RoCE
   4  *
   5  *  Definitions for LLC (link layer control) message handling
   6  *
   7  *  Copyright IBM Corp. 2016
   8  *
   9  *  Author(s):  Klaus Wacker <Klaus.Wacker@de.ibm.com>
  10  *              Ursula Braun <ubraun@linux.vnet.ibm.com>
  11  */
  12
  13 #ifndef SMC_LLC_H
  14 #define SMC_LLC_H
  15
  16 #include "smc_wr.h"
  17
  18 #define SMC_LLC_FLAG_RESP               0x80
  19
  20 #define SMC_LLC_WAIT_FIRST_TIME         (5 * HZ)
  21 #define SMC_LLC_WAIT_TIME               (2 * HZ)
  22
  23 enum smc_llc_reqresp {
  24         SMC_LLC_REQ,
  25         SMC_LLC_RESP
  26 };
  27
  28 enum smc_llc_msg_type {
  29         SMC_LLC_CONFIRM_LINK            = 0x01,
  30         SMC_LLC_ADD_LINK                = 0x02,
  31         SMC_LLC_DELETE_LINK             = 0x04,
  32         SMC_LLC_CONFIRM_RKEY            = 0x06,
  33         SMC_LLC_TEST_LINK               = 0x07,
  34         SMC_LLC_CONFIRM_RKEY_CONT       = 0x08,
  35         SMC_LLC_DELETE_RKEY             = 0x09,
  36 };
  37
  38 /* transmit */
  39 int smc_llc_send_confirm_link(struct smc_link *lnk,
  40                               enum smc_llc_reqresp reqresp);
  41 int smc_llc_send_add_link(struct smc_link *link, u8 mac[], u8 gid[],
  42                           enum smc_llc_reqresp reqresp);
  43 int smc_llc_send_delete_link(struct smc_link *link,
  44                              enum smc_llc_reqresp reqresp, bool orderly);
  45 int smc_llc_link_init(struct smc_link *link);
  46 void smc_llc_link_active(struct smc_link *link, int testlink_time);
  47 void smc_llc_link_deleting(struct smc_link *link);
  48 void smc_llc_link_inactive(struct smc_link *link);
  49 void smc_llc_link_clear(struct smc_link *link);
  50 int smc_llc_do_confirm_rkey(struct smc_link *link,
  51                             struct smc_buf_desc *rmb_desc);
  52 int smc_llc_init(void) __init;
  53
  54 #endif /* SMC_LLC_H */