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
  22 /**
  23  * struct smc_pnettable - SMC PNET table anchor
  24  * @lock: Lock for list action
  25  * @pnetlist: List of PNETIDs
  26  */
  27 struct smc_pnettable {
  28         rwlock_t lock;
  29         struct list_head pnetlist;
  30 };
  31
  32 static inline int smc_pnetid_by_dev_port(struct device *dev,
  33                                          unsigned short port, u8 *pnetid)
  34 {
  35 #if IS_ENABLED(CONFIG_HAVE_PNETID)
  36         return pnet_id_by_dev_port(dev, port, pnetid);
  37 #else
  38         return -ENOENT;
  39 #endif
  40 }
  41
  42 int smc_pnet_init(void) __init;
  43 int smc_pnet_net_init(struct net *net);
  44 void smc_pnet_exit(void);
  45 void smc_pnet_net_exit(struct net *net);
  46 void smc_pnet_find_roce_resource(struct sock *sk,
  47                                  struct smc_ib_device **smcibdev, u8 *ibport,
  48                                  unsigned short vlan_id, u8 gid[]);
  49 void smc_pnet_find_ism_resource(struct sock *sk, struct smcd_dev **smcismdev);
  50
  51 #endif