#include "smc_pnet.h"
#include "smc_ib.h"
-
-#define SMC_MAX_PNET_ID_LEN 16 /* Max. length of PNET id */
+#include "smc_ism.h"
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,
*/
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;
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))
kfree(pnetelem);
return rc;
}
- rc = smc_ib_remember_port_attr(pnetelem->smcibdev, pnetelem->ib_port);
- if (rc)
- smc_pnet_remove_by_pnetid(pnetelem->pnet_name);
return rc;
}
case NETDEV_REBOOT:
case NETDEV_UNREGISTER:
smc_pnet_remove_by_ndev(event_dev);
+ return NOTIFY_OK;
default:
- break;
+ return NOTIFY_DONE;
}
- return NOTIFY_DONE;
}
static struct notifier_block smc_netdev_notifier = {
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 with vlan_id
+ * configured.
+ */
+static void smc_pnet_find_roce_by_pnetid(struct net_device *ndev,
+ struct smc_ib_device **smcibdev,
+ u8 *ibport, unsigned short vlan_id,
+ u8 gid[])
+{
+ 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 (!rdma_is_port_valid(ibdev->ibdev, i))
+ continue;
+ if (!memcmp(ibdev->pnetid[i - 1], ndev_pnetid,
+ SMC_MAX_PNETID_LEN) &&
+ smc_ib_port_active(ibdev, i) &&
+ !smc_ib_determine_gid(ibdev, i, vlan_id, gid,
+ NULL)) {
+ *smcibdev = ibdev;
+ *ibport = i;
+ goto out;
+ }
+ }
+ }
+out:
+ 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,
+ u8 *ibport, unsigned short vlan_id,
+ u8 gid[])
+{
+ 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)) {
+ pnetelem->ib_port) &&
+ !smc_ib_determine_gid(pnetelem->smcibdev,
+ pnetelem->ib_port, vlan_id,
+ gid, NULL)) {
*smcibdev = pnetelem->smcibdev;
*ibport = pnetelem->ib_port;
}
}
}
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,
+ unsigned short vlan_id, u8 gid[])
+{
+ 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, vlan_id, gid);
+ if (*smcibdev)
+ goto out_rel;
+
+ /* lookup via SMC PNET table */
+ smc_pnet_find_roce_by_table(dst->dev, smcibdev, ibport, vlan_id, gid);
+
+out_rel:
+ dst_release(dst);
+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;
}
projects / mirror_ubuntu-jammy-kernel.git / blobdiff