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net/smc: add pnetid support for SMC-D and ISM 

SMC-D relies on PNETIDs to find usable SMC-D/ISM devices for a SMC
connection. This patch adds SMC-D/ISM support to the current PNETID
implementation.

Signed-off-by: Hans Wippel <hwippel@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Suggested-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hans Wippel 2018-06-28 19:05:08 +02:00 committed by David S. Miller
parent c6ba7c9ba4
commit 1619f77058
4 changed files with 46 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/smc.h
View File

@ -73,6 +73,7 @@ struct smcd_dev {
struct smc_connection **conn;
struct list_head vlan;
struct workqueue_struct *event_wq;
u8 pnetid[SMC_MAX_PNETID_LEN];
};
struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,

2
net/smc/smc_ism.c
View File

@ -13,6 +13,7 @@
#include "smc.h"
#include "smc_core.h"
#include "smc_ism.h"
#include "smc_pnet.h"
struct smcd_dev_list smcd_dev_list = {
.list = LIST_HEAD_INIT(smcd_dev_list.list),
@ -227,6 +228,7 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
device_initialize(&smcd->dev);
dev_set_name(&smcd->dev, name);
smcd->ops = ops;
smc_pnetid_by_dev_port(parent, 0, smcd->pnetid);
spin_lock_init(&smcd->lock);
INIT_LIST_HEAD(&smcd->vlan);

41
net/smc/smc_pnet.c
View File

@ -22,6 +22,7 @@
#include "smc_pnet.h"
#include "smc_ib.h"
#include "smc_ism.h"
static struct nla_policy smc_pnet_policy[SMC_PNETID_MAX + 1] = {
[SMC_PNETID_NAME] = {
@ -564,6 +565,27 @@ static void smc_pnet_find_roce_by_pnetid(struct net_device *ndev,
spin_unlock(&smc_ib_devices.lock);
}
static void smc_pnet_find_ism_by_pnetid(struct net_device *ndev,
struct smcd_dev **smcismdev)
{
u8 ndev_pnetid[SMC_MAX_PNETID_LEN];
struct smcd_dev *ismdev;
ndev = pnet_find_base_ndev(ndev);
if (smc_pnetid_by_dev_port(ndev->dev.parent, ndev->dev_port,
ndev_pnetid))
return; /* pnetid could not be determined */
spin_lock(&smcd_dev_list.lock);
list_for_each_entry(ismdev, &smcd_dev_list.list, list) {
if (!memcmp(ismdev->pnetid, ndev_pnetid, SMC_MAX_PNETID_LEN)) {
*smcismdev = ismdev;
break;
}
}
spin_unlock(&smcd_dev_list.lock);
}
/* Lookup of coupled ib_device via SMC pnet table */
static void smc_pnet_find_roce_by_table(struct net_device *netdev,
struct smc_ib_device **smcibdev,
@ -615,3 +637,22 @@ out_rel:
out:
return;
}
void smc_pnet_find_ism_resource(struct sock *sk, struct smcd_dev **smcismdev)
{
struct dst_entry *dst = sk_dst_get(sk);
*smcismdev = NULL;
if (!dst)
goto out;
if (!dst->dev)
goto out_rel;
/* if possible, lookup via hardware-defined pnetid */
smc_pnet_find_ism_by_pnetid(dst->dev, smcismdev);
out_rel:
dst_release(dst);
out:
return;
}

2
net/smc/smc_pnet.h
View File

@ -17,6 +17,7 @@
#endif
struct smc_ib_device;
struct smcd_dev;
static inline int smc_pnetid_by_dev_port(struct device *dev,
unsigned short port, u8 *pnetid)
@ -33,5 +34,6 @@ void smc_pnet_exit(void);
int smc_pnet_remove_by_ibdev(struct smc_ib_device *ibdev);
void smc_pnet_find_roce_resource(struct sock *sk,
struct smc_ib_device **smcibdev, u8 *ibport);
void smc_pnet_find_ism_resource(struct sock *sk, struct smcd_dev **smcismdev);
#endif