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
21struct smc_ib_device;
22struct smcd_dev;
23struct smc_init_info;
24struct 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 */
31struct smc_pnettable {
32 struct mutex lock;
33 struct list_head pnetlist;
34};
35
36struct smc_pnetids_ndev { /* list of pnetids for net devices in UP state*/
37 struct list_head list;
38 rwlock_t lock;
39};
40
41struct smc_pnetids_ndev_entry {
42 struct list_head list;
43 u8 pnetid[SMC_MAX_PNETID_LEN];
44 refcount_t refcnt;
45};
46
47static 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
57int smc_pnet_init(void) __init;
58int smc_pnet_net_init(struct net *net);
59void smc_pnet_exit(void);
60void smc_pnet_net_exit(struct net *net);
61void smc_pnet_find_roce_resource(struct sock *sk, struct smc_init_info *ini);
62void smc_pnet_find_ism_resource(struct sock *sk, struct smc_init_info *ini);
63int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port);
64int smc_pnetid_by_table_smcd(struct smcd_dev *smcd);
65void smc_pnet_find_alt_roce(struct smc_link_group *lgr,
66 struct smc_init_info *ini,
67 struct smc_ib_device *known_dev);
68bool smc_pnet_is_ndev_pnetid(struct net *net, u8 *pnetid);
69bool smc_pnet_is_pnetid_set(u8 *pnetid);
70#endif
71

source code of linux/net/smc/smc_pnet.h