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 struct mutex 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
71
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