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-rw-r--r--include/net/smc.h2
-rw-r--r--net/smc/smc_ib.c6
-rw-r--r--net/smc/smc_ib.h3
-rw-r--r--net/smc/smc_pnet.c109
-rw-r--r--net/smc/smc_pnet.h14
5 files changed, 114 insertions, 20 deletions
diff --git a/include/net/smc.h b/include/net/smc.h
index 8381d163fefa..2173932fab9d 100644
--- a/include/net/smc.h
+++ b/include/net/smc.h
@@ -11,6 +11,8 @@
#ifndef _SMC_H
#define _SMC_H
+#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
+
struct smc_hashinfo {
rwlock_t lock;
struct hlist_head ht;
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index f8b159ced032..36de2fd76170 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -504,8 +504,12 @@ static void smc_ib_add_dev(struct ib_device *ibdev)
port_cnt = smcibdev->ibdev->phys_port_cnt;
for (i = 0;
i < min_t(size_t, port_cnt, SMC_MAX_PORTS);
- i++)
+ i++) {
set_bit(i, &smcibdev->port_event_mask);
+ /* determine pnetids of the port */
+ smc_pnetid_by_dev_port(ibdev->dev.parent, i,
+ smcibdev->pnetid[i]);
+ }
schedule_work(&smcibdev->port_event_work);
}
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h
index 2c480b352928..7c1223c91229 100644
--- a/net/smc/smc_ib.h
+++ b/net/smc/smc_ib.h
@@ -15,6 +15,7 @@
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <rdma/ib_verbs.h>
+#include <net/smc.h>
#define SMC_MAX_PORTS 2 /* Max # of ports */
#define SMC_GID_SIZE sizeof(union ib_gid)
@@ -40,6 +41,8 @@ struct smc_ib_device { /* ib-device infos for smc */
char mac[SMC_MAX_PORTS][ETH_ALEN];
/* mac address per port*/
union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */
+ u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN];
+ /* pnetid per port */
u8 initialized : 1; /* ib dev CQ, evthdl done */
struct work_struct port_event_work;
unsigned long port_event_mask;
diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index a82a5cad0282..cdc6e23b6ce1 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -23,12 +23,10 @@
#include "smc_pnet.h"
#include "smc_ib.h"
-#define SMC_MAX_PNET_ID_LEN 16 /* Max. length of PNET id */
-
static struct nla_policy smc_pnet_policy[SMC_PNETID_MAX + 1] = {
[SMC_PNETID_NAME] = {
.type = NLA_NUL_STRING,
- .len = SMC_MAX_PNET_ID_LEN - 1
+ .len = SMC_MAX_PNETID_LEN - 1
},
[SMC_PNETID_ETHNAME] = {
.type = NLA_NUL_STRING,
@@ -65,7 +63,7 @@ static struct smc_pnettable {
*/
struct smc_pnetentry {
struct list_head list;
- char pnet_name[SMC_MAX_PNET_ID_LEN + 1];
+ char pnet_name[SMC_MAX_PNETID_LEN + 1];
struct net_device *ndev;
struct smc_ib_device *smcibdev;
u8 ib_port;
@@ -209,7 +207,7 @@ static bool smc_pnetid_valid(const char *pnet_name, char *pnetid)
return false;
while (--end >= bf && isspace(*end))
;
- if (end - bf >= SMC_MAX_PNET_ID_LEN)
+ if (end - bf >= SMC_MAX_PNETID_LEN)
return false;
while (bf <= end) {
if (!isalnum(*bf))
@@ -512,26 +510,70 @@ void smc_pnet_exit(void)
genl_unregister_family(&smc_pnet_nl_family);
}
-/* PNET table analysis for a given sock:
- * determine ib_device and port belonging to used internal TCP socket
- * ethernet interface.
+/* Determine one base device for stacked net devices.
+ * If the lower device level contains more than one devices
+ * (for instance with bonding slaves), just the first device
+ * is used to reach a base device.
*/
-void smc_pnet_find_roce_resource(struct sock *sk,
- struct smc_ib_device **smcibdev, u8 *ibport)
+static struct net_device *pnet_find_base_ndev(struct net_device *ndev)
{
- struct dst_entry *dst = sk_dst_get(sk);
- struct smc_pnetentry *pnetelem;
+ int i, nest_lvl;
- *smcibdev = NULL;
- *ibport = 0;
+ rtnl_lock();
+ nest_lvl = dev_get_nest_level(ndev);
+ for (i = 0; i < nest_lvl; i++) {
+ struct list_head *lower = &ndev->adj_list.lower;
+
+ if (list_empty(lower))
+ break;
+ lower = lower->next;
+ ndev = netdev_lower_get_next(ndev, &lower);
+ }
+ rtnl_unlock();
+ return ndev;
+}
+
+/* Determine the corresponding IB device port based on the hardware PNETID.
+ * Searching stops at the first matching active IB device port.
+ */
+static void smc_pnet_find_roce_by_pnetid(struct net_device *ndev,
+ struct smc_ib_device **smcibdev,
+ u8 *ibport)
+{
+ u8 ndev_pnetid[SMC_MAX_PNETID_LEN];
+ struct smc_ib_device *ibdev;
+ int i;
+
+ 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(&smc_ib_devices.lock);
+ list_for_each_entry(ibdev, &smc_ib_devices.list, list) {
+ for (i = 1; i <= SMC_MAX_PORTS; i++) {
+ if (!memcmp(ibdev->pnetid[i - 1], ndev_pnetid,
+ SMC_MAX_PNETID_LEN) &&
+ smc_ib_port_active(ibdev, i)) {
+ *smcibdev = ibdev;
+ *ibport = i;
+ break;
+ }
+ }
+ }
+ spin_unlock(&smc_ib_devices.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,
+ u8 *ibport)
+{
+ struct smc_pnetentry *pnetelem;
- if (!dst)
- return;
- if (!dst->dev)
- goto out_rel;
read_lock(&smc_pnettable.lock);
list_for_each_entry(pnetelem, &smc_pnettable.pnetlist, list) {
- if (dst->dev == pnetelem->ndev) {
+ if (netdev == pnetelem->ndev) {
if (smc_ib_port_active(pnetelem->smcibdev,
pnetelem->ib_port)) {
*smcibdev = pnetelem->smcibdev;
@@ -541,6 +583,35 @@ void smc_pnet_find_roce_resource(struct sock *sk,
}
}
read_unlock(&smc_pnettable.lock);
+}
+
+/* PNET table analysis for a given sock:
+ * determine ib_device and port belonging to used internal TCP socket
+ * ethernet interface.
+ */
+void smc_pnet_find_roce_resource(struct sock *sk,
+ struct smc_ib_device **smcibdev, u8 *ibport)
+{
+ struct dst_entry *dst = sk_dst_get(sk);
+
+ *smcibdev = NULL;
+ *ibport = 0;
+
+ if (!dst)
+ goto out;
+ if (!dst->dev)
+ goto out_rel;
+
+ /* if possible, lookup via hardware-defined pnetid */
+ smc_pnet_find_roce_by_pnetid(dst->dev, smcibdev, ibport);
+ if (*smcibdev)
+ goto out_rel;
+
+ /* lookup via SMC PNET table */
+ smc_pnet_find_roce_by_table(dst->dev, smcibdev, ibport);
+
out_rel:
dst_release(dst);
+out:
+ return;
}
diff --git a/net/smc/smc_pnet.h b/net/smc/smc_pnet.h
index 5a29519db976..ad4455cde9e7 100644
--- a/net/smc/smc_pnet.h
+++ b/net/smc/smc_pnet.h
@@ -12,8 +12,22 @@
#ifndef _SMC_PNET_H
#define _SMC_PNET_H
+#if IS_ENABLED(CONFIG_HAVE_PNETID)
+#include <asm/pnet.h>
+#endif
+
struct smc_ib_device;
+static inline int smc_pnetid_by_dev_port(struct device *dev,
+ unsigned short port, u8 *pnetid)
+{
+#if IS_ENABLED(CONFIG_HAVE_PNETID)
+ return pnet_id_by_dev_port(dev, port, pnetid);
+#else
+ return -ENOENT;
+#endif
+}
+
int smc_pnet_init(void) __init;
void smc_pnet_exit(void);
int smc_pnet_remove_by_ibdev(struct smc_ib_device *ibdev);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-19 00:30:10 +0000