diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/dsa/tag_ksz.c | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index 6603eaa234d2..e14ee26bf6a0 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -26,6 +26,7 @@ struct ksz_tagger_private { struct ksz_tagger_data data; /* Must be first */ unsigned long state; + struct kthread_worker *xmit_worker; }; static struct ksz_tagger_private * @@ -48,6 +49,7 @@ static void ksz_disconnect(struct dsa_switch *ds) { struct ksz_tagger_private *priv = ds->tagger_data; + kthread_destroy_worker(priv->xmit_worker); kfree(priv); ds->tagger_data = NULL; } @@ -55,12 +57,23 @@ static void ksz_disconnect(struct dsa_switch *ds) static int ksz_connect(struct dsa_switch *ds) { struct ksz_tagger_data *tagger_data; + struct kthread_worker *xmit_worker; struct ksz_tagger_private *priv; + int ret; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; + xmit_worker = kthread_create_worker(0, "dsa%d:%d_xmit", + ds->dst->index, ds->index); + if (IS_ERR(xmit_worker)) { + ret = PTR_ERR(xmit_worker); + kfree(priv); + return ret; + } + + priv->xmit_worker = xmit_worker; /* Export functions for switch driver use */ tagger_data = &priv->data; tagger_data->hwtstamp_set_state = ksz_hwtstamp_set_state; @@ -191,6 +204,41 @@ static void ksz_xmit_timestamp(struct dsa_port *dp, struct sk_buff *skb) put_unaligned_be32(0, skb_put(skb, KSZ_PTP_TAG_LEN)); } +/* Defer transmit if waiting for egress time stamp is required. */ +static struct sk_buff *ksz_defer_xmit(struct dsa_port *dp, struct sk_buff *skb) +{ + struct ksz_tagger_data *tagger_data = ksz_tagger_data(dp->ds); + struct ksz_tagger_private *priv = ksz_tagger_private(dp->ds); + void (*xmit_work_fn)(struct kthread_work *work); + struct sk_buff *clone = KSZ_SKB_CB(skb)->clone; + struct ksz_deferred_xmit_work *xmit_work; + struct kthread_worker *xmit_worker; + + if (!clone) + return skb; /* no deferred xmit for this packet */ + + xmit_work_fn = tagger_data->xmit_work_fn; + xmit_worker = priv->xmit_worker; + + if (!xmit_work_fn || !xmit_worker) + return NULL; + + xmit_work = kzalloc(sizeof(*xmit_work), GFP_ATOMIC); + if (!xmit_work) + return NULL; + + kthread_init_work(&xmit_work->work, xmit_work_fn); + /* Increase refcount so the kfree_skb in dsa_slave_xmit + * won't really free the packet. + */ + xmit_work->dp = dp; + xmit_work->skb = skb_get(skb); + + kthread_queue_work(xmit_worker, &xmit_work->work); + + return NULL; +} + static struct sk_buff *ksz9477_xmit(struct sk_buff *skb, struct net_device *dev) { @@ -215,7 +263,7 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb, *tag = cpu_to_be16(val); - return skb; + return ksz_defer_xmit(dp, skb); } static struct sk_buff *ksz9477_rcv(struct sk_buff *skb, struct net_device *dev) @@ -271,7 +319,7 @@ static struct sk_buff *ksz9893_xmit(struct sk_buff *skb, if (is_link_local_ether_addr(addr)) *tag |= KSZ9893_TAIL_TAG_OVERRIDE; - return skb; + return ksz_defer_xmit(dp, skb); } static const struct dsa_device_ops ksz9893_netdev_ops = { @@ -336,7 +384,7 @@ static struct sk_buff *lan937x_xmit(struct sk_buff *skb, put_unaligned_be16(val, tag); - return skb; + return ksz_defer_xmit(dp, skb); } static const struct dsa_device_ops lan937x_netdev_ops = { |