1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Shared Memory Communications over RDMA (SMC-R) and RoCE
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * PNET table queries
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright IBM Corp. 2016
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Author(s): Thomas Richter <tmricht@linux.vnet.ibm.com>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #ifndef _SMC_PNET_H
13*4882a593Smuzhiyun #define _SMC_PNET_H
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <net/smc.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_HAVE_PNETID)
18*4882a593Smuzhiyun #include <asm/pnet.h>
19*4882a593Smuzhiyun #endif
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct smc_ib_device;
22*4882a593Smuzhiyun struct smcd_dev;
23*4882a593Smuzhiyun struct smc_init_info;
24*4882a593Smuzhiyun struct smc_link_group;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun /**
27*4882a593Smuzhiyun * struct smc_pnettable - SMC PNET table anchor
28*4882a593Smuzhiyun * @lock: Lock for list action
29*4882a593Smuzhiyun * @pnetlist: List of PNETIDs
30*4882a593Smuzhiyun */
31*4882a593Smuzhiyun struct smc_pnettable {
32*4882a593Smuzhiyun struct mutex lock;
33*4882a593Smuzhiyun struct list_head pnetlist;
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun struct smc_pnetids_ndev { /* list of pnetids for net devices in UP state*/
37*4882a593Smuzhiyun struct list_head list;
38*4882a593Smuzhiyun rwlock_t lock;
39*4882a593Smuzhiyun };
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun struct smc_pnetids_ndev_entry {
42*4882a593Smuzhiyun struct list_head list;
43*4882a593Smuzhiyun u8 pnetid[SMC_MAX_PNETID_LEN];
44*4882a593Smuzhiyun refcount_t refcnt;
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun
smc_pnetid_by_dev_port(struct device * dev,unsigned short port,u8 * pnetid)47*4882a593Smuzhiyun static inline int smc_pnetid_by_dev_port(struct device *dev,
48*4882a593Smuzhiyun unsigned short port, u8 *pnetid)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_HAVE_PNETID)
51*4882a593Smuzhiyun return pnet_id_by_dev_port(dev, port, pnetid);
52*4882a593Smuzhiyun #else
53*4882a593Smuzhiyun return -ENOENT;
54*4882a593Smuzhiyun #endif
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun int smc_pnet_init(void) __init;
58*4882a593Smuzhiyun int smc_pnet_net_init(struct net *net);
59*4882a593Smuzhiyun void smc_pnet_exit(void);
60*4882a593Smuzhiyun void smc_pnet_net_exit(struct net *net);
61*4882a593Smuzhiyun void smc_pnet_find_roce_resource(struct sock *sk, struct smc_init_info *ini);
62*4882a593Smuzhiyun void smc_pnet_find_ism_resource(struct sock *sk, struct smc_init_info *ini);
63*4882a593Smuzhiyun int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port);
64*4882a593Smuzhiyun int smc_pnetid_by_table_smcd(struct smcd_dev *smcd);
65*4882a593Smuzhiyun void smc_pnet_find_alt_roce(struct smc_link_group *lgr,
66*4882a593Smuzhiyun struct smc_init_info *ini,
67*4882a593Smuzhiyun struct smc_ib_device *known_dev);
68*4882a593Smuzhiyun bool smc_pnet_is_ndev_pnetid(struct net *net, u8 *pnetid);
69*4882a593Smuzhiyun bool smc_pnet_is_pnetid_set(u8 *pnetid);
70*4882a593Smuzhiyun #endif
71