diff options
Diffstat (limited to 'drivers/s390/net/qeth_l2_main.c')
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 2ab130d5c42d..7cba3d0035bf 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -17,10 +17,12 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/etherdevice.h> +#include <linux/if_bridge.h> #include <linux/list.h> #include <linux/hash.h> #include <linux/hashtable.h> #include <asm/chsc.h> +#include <asm/css_chars.h> #include <asm/setup.h> #include "qeth_core.h" #include "qeth_l2.h" @@ -826,6 +828,46 @@ static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card) } } +/** + * qeth_l2_detect_dev2br_support() - + * Detect whether this card supports 'dev to bridge fdb network address + * change notification' and thus can support the learning_sync bridgeport + * attribute + * @card: qeth_card structure pointer + * + * This is a destructive test and must be called before dev2br or + * bridgeport address notification is enabled! + */ +static void qeth_l2_detect_dev2br_support(struct qeth_card *card) +{ + struct qeth_priv *priv = netdev_priv(card->dev); + bool dev2br_supported; + int rc; + + QETH_CARD_TEXT(card, 2, "d2brsup"); + if (!IS_IQD(card)) + return; + + /* dev2br requires valid cssid,iid,chid */ + if (!card->info.ids_valid) { + dev2br_supported = false; + } else if (css_general_characteristics.enarf) { + dev2br_supported = true; + } else { + /* Old machines don't have the feature bit: + * Probe by testing whether a disable succeeds + */ + rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL); + dev2br_supported = !rc; + } + QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported); + + if (dev2br_supported) + priv->brport_hw_features |= BR_LEARNING_SYNC; + else + priv->brport_hw_features &= ~BR_LEARNING_SYNC; +} + static int qeth_l2_set_online(struct qeth_card *card) { struct ccwgroup_device *gdev = card->gdev; @@ -840,6 +882,9 @@ static int qeth_l2_set_online(struct qeth_card *card) goto out_remove; } + /* query before bridgeport_notification may be enabled */ + qeth_l2_detect_dev2br_support(card); + mutex_lock(&card->sbp_lock); qeth_bridgeport_query_support(card); if (card->options.sbp.supported_funcs) { |