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 #include <net/smc.h>
  16
  17 #if IS_ENABLED(CONFIG_HAVE_PNETID)
  18 #include <asm/pnet.h>
  19 #endif
  20
  21 struct smc_ib_device;
  22 struct smcd_dev;
  23 struct smc_init_info;
  24 struct smc_link_group;
  25
  26 /**
  27  * struct smc_pnettable - SMC PNET table anchor
  28  * @lock: Lock for list action
  29  * @pnetlist: List of PNETIDs
  30  */
  31 struct smc_pnettable {
  32         rwlock_t lock;
  33         struct list_head pnetlist;
  34 };
  35
  36 struct smc_pnetids_ndev {       /* list of pnetids for net devices in UP state*/
  37         struct list_head        list;
  38         rwlock_t                lock;
  39 };
  40
  41 struct smc_pnetids_ndev_entry {
  42         struct list_head        list;
  43         u8                      pnetid[SMC_MAX_PNETID_LEN];
  44         refcount_t              refcnt;
  45 };
  46
  47 static inline int smc_pnetid_by_dev_port(struct device *dev,
  48                                          unsigned short port, u8 *pnetid)
  49 {
  50 #if IS_ENABLED(CONFIG_HAVE_PNETID)
  51         return pnet_id_by_dev_port(dev, port, pnetid);
  52 #else
  53         return -ENOENT;
  54 #endif
  55 }
  56
  57 int smc_pnet_init(void) __init;
  58 int smc_pnet_net_init(struct net *net);
  59 void smc_pnet_exit(void);
  60 void smc_pnet_net_exit(struct net *net);
  61 void smc_pnet_find_roce_resource(struct sock *sk, struct smc_init_info *ini);
  62 void smc_pnet_find_ism_resource(struct sock *sk, struct smc_init_info *ini);
  63 int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port);
  64 int smc_pnetid_by_table_smcd(struct smcd_dev *smcd);
  65 void smc_pnet_find_alt_roce(struct smc_link_group *lgr,
  66                             struct smc_init_info *ini,
  67                             struct smc_ib_device *known_dev);
  68 bool smc_pnet_is_ndev_pnetid(struct net *net, u8 *pnetid);
  69 bool smc_pnet_is_pnetid_set(u8 *pnetid);
  70 #endif