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11#include <linux/dsa/8021q.h>
12#include <linux/dsa/ocelot.h>
13#include "dsa_priv.h"
14
15static struct sk_buff *ocelot_defer_xmit(struct dsa_port *dp,
16 struct sk_buff *skb)
17{
18 struct felix_deferred_xmit_work *xmit_work;
19 struct felix_port *felix_port = dp->priv;
20
21 xmit_work = kzalloc(sizeof(*xmit_work), GFP_ATOMIC);
22 if (!xmit_work)
23 return NULL;
24
25
26 kthread_init_work(&xmit_work->work, felix_port->xmit_work_fn);
27
28
29
30 xmit_work->dp = dp;
31 xmit_work->skb = skb_get(skb);
32
33 kthread_queue_work(felix_port->xmit_worker, &xmit_work->work);
34
35 return NULL;
36}
37
38static struct sk_buff *ocelot_xmit(struct sk_buff *skb,
39 struct net_device *netdev)
40{
41 struct dsa_port *dp = dsa_slave_to_port(netdev);
42 u16 tx_vid = dsa_8021q_tx_vid(dp->ds, dp->index);
43 u16 queue_mapping = skb_get_queue_mapping(skb);
44 u8 pcp = netdev_txq_to_tc(netdev, queue_mapping);
45 struct ethhdr *hdr = eth_hdr(skb);
46
47 if (ocelot_ptp_rew_op(skb) || is_link_local_ether_addr(hdr->h_dest))
48 return ocelot_defer_xmit(dp, skb);
49
50 return dsa_8021q_xmit(skb, netdev, ETH_P_8021Q,
51 ((pcp << VLAN_PRIO_SHIFT) | tx_vid));
52}
53
54static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
55 struct net_device *netdev)
56{
57 int src_port, switch_id;
58
59 dsa_8021q_rcv(skb, &src_port, &switch_id);
60
61 skb->dev = dsa_master_find_slave(netdev, switch_id, src_port);
62 if (!skb->dev)
63 return NULL;
64
65 dsa_default_offload_fwd_mark(skb);
66
67 return skb;
68}
69
70static const struct dsa_device_ops ocelot_8021q_netdev_ops = {
71 .name = "ocelot-8021q",
72 .proto = DSA_TAG_PROTO_OCELOT_8021Q,
73 .xmit = ocelot_xmit,
74 .rcv = ocelot_rcv,
75 .needed_headroom = VLAN_HLEN,
76 .promisc_on_master = true,
77};
78
79MODULE_LICENSE("GPL v2");
80MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_OCELOT_8021Q);
81
82module_dsa_tag_driver(ocelot_8021q_netdev_ops);
83