net/smc/smc_pnet.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Shared Memory Communications over RDMA (SMC-R) and RoCE
   4  *
   5  *  PNET table queries
   6  *
   7  *  Copyright IBM Corp. 2016
   8  *
   9  *  Author(s):  Thomas Richter <tmricht@linux.vnet.ibm.com>
  10  */
  11
  12 #ifndef _SMC_PNET_H
  13 #define _SMC_PNET_H
  14
  15 #if IS_ENABLED(CONFIG_HAVE_PNETID)
  16 #include <asm/pnet.h>
  17 #endif
  18
  19 struct smc_ib_device;
  20 struct smcd_dev;
  21 struct smc_init_info;
  22 struct smc_link_group;
  23
  24 /**
  25  * struct smc_pnettable - SMC PNET table anchor
  26  * @lock: Lock for list action
  27  * @pnetlist: List of PNETIDs
  28  */
  29 struct smc_pnettable {
  30         rwlock_t lock;
  31         struct list_head pnetlist;
  32 };
  33
  34 static inline int smc_pnetid_by_dev_port(struct device *dev,
  35                                          unsigned short port, u8 *pnetid)
  36 {
  37 #if IS_ENABLED(CONFIG_HAVE_PNETID)
  38         return pnet_id_by_dev_port(dev, port, pnetid);
  39 #else
  40         return -ENOENT;
  41 #endif
  42 }
  43
  44 int smc_pnet_init(void) __init;
  45 int smc_pnet_net_init(struct net *net);
  46 void smc_pnet_exit(void);
  47 void smc_pnet_net_exit(struct net *net);
  48 void smc_pnet_find_roce_resource(struct sock *sk, struct smc_init_info *ini);
  49 void smc_pnet_find_ism_resource(struct sock *sk, struct smc_init_info *ini);
  50 int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port);
  51 int smc_pnetid_by_table_smcd(struct smcd_dev *smcd);
  52 void smc_pnet_find_alt_roce(struct smc_link_group *lgr,
  53                             struct smc_init_info *ini,
  54                             struct smc_ib_device *known_dev);
  55 #endif