From: Alexander Lobakin <alobakin@dlink.ru>
To: "David S. Miller" <davem@davemloft.net>
Cc: Edward Cree <ecree@solarflare.com>, Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Hauke Mehrtens <hauke@hauke-m.de>,
Sean Wang <sean.wang@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Jiri Pirko <jiri@mellanox.com>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Alexander Lobakin <alobakin@dlink.ru>,
Taehee Yoo <ap420073@gmail.com>,
Stephen Hemminger <stephen@networkplumber.org>,
Stanislav Fomichev <sdf@google.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Song Liu <songliubraving@fb.com>,
Matteo Croce <mcroce@redhat.com>,
Jakub Sitnicki <jakub@cloudflare.com>,
Paul Blakey <paulb@mellanox.com>,
Yoshiki Komachi <komachi.yoshiki@gmail.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Subject: [PATCH RFC net-next 12/19] net: dsa: tag_lan9303: split out common tag accessors
Date: Mon, 30 Dec 2019 17:30:20 +0300 [thread overview]
Message-ID: <20191230143028.27313-13-alobakin@dlink.ru> (raw)
In-Reply-To: <20191230143028.27313-1-alobakin@dlink.ru>
...as they will be needed in the upcoming GRO callbacks.
Signed-off-by: Alexander Lobakin <alobakin@dlink.ru>
---
net/dsa/tag_lan9303.c | 46 +++++++++++++++++++++++++++++--------------
1 file changed, 31 insertions(+), 15 deletions(-)
diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c
index d328a44381a9..ba03502986a4 100644
--- a/net/dsa/tag_lan9303.c
+++ b/net/dsa/tag_lan9303.c
@@ -38,6 +38,32 @@
# define LAN9303_TAG_RX_TRAPPED_TO_CPU (LAN9303_TAG_RX_IGMP | \
LAN9303_TAG_RX_STP)
+static inline bool lan9303_sanity_check(const u8 *data)
+{
+ /* '->data' points into the middle of our special VLAN tag information:
+ *
+ * ~ MAC src | 0x81 | 0x00 | 0xyy | 0xzz | ether type
+ * ^
+ * ->data
+ */
+ return *(__be16 *)(data - 2) == htons(ETH_P_8021Q);
+}
+
+static inline bool lan9303_trapped_to_cpu(const u8 *data)
+{
+ return *(data + 1) & LAN9303_TAG_RX_TRAPPED_TO_CPU;
+}
+
+static inline int lan9303_source_port(const u8 *data)
+{
+ return *(data + 1) & GENMASK(1, 0);
+}
+
+static inline __be16 lan9303_encap_proto(const u8 *data)
+{
+ return *(__be16 *)(data + 2);
+}
+
/* Decide whether to transmit using ALR lookup, or transmit directly to
* port using tag. ALR learning is performed only when using ALR lookup.
* If the two external ports are bridged and the frame is unicast,
@@ -85,8 +111,6 @@ static struct sk_buff *lan9303_xmit(struct sk_buff *skb, struct net_device *dev)
static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt)
{
- u16 *lan9303_tag;
- u16 lan9303_tag1;
unsigned int source_port;
if (unlikely(!pskb_may_pull(skb, LAN9303_TAG_LEN))) {
@@ -95,21 +119,12 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev,
return NULL;
}
- /* '->data' points into the middle of our special VLAN tag information:
- *
- * ~ MAC src | 0x81 | 0x00 | 0xyy | 0xzz | ether type
- * ^
- * ->data
- */
- lan9303_tag = (u16 *)(skb->data - 2);
-
- if (lan9303_tag[0] != htons(ETH_P_8021Q)) {
+ if (!lan9303_sanity_check(skb->data)) {
dev_warn_ratelimited(&dev->dev, "Dropping packet due to invalid VLAN marker\n");
return NULL;
}
- lan9303_tag1 = ntohs(lan9303_tag[1]);
- source_port = lan9303_tag1 & 0x3;
+ source_port = lan9303_source_port(skb->data);
skb->dev = dsa_master_find_slave(dev, 0, source_port);
if (!skb->dev) {
@@ -117,13 +132,14 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev,
return NULL;
}
+ skb->offload_fwd_mark = !lan9303_trapped_to_cpu(skb->data);
+
/* remove the special VLAN tag between the MAC addresses
* and the current ethertype field.
*/
skb_pull_rcsum(skb, 2 + 2);
memmove(skb->data - ETH_HLEN, skb->data - (ETH_HLEN + LAN9303_TAG_LEN),
2 * ETH_ALEN);
- skb->offload_fwd_mark = !(lan9303_tag1 & LAN9303_TAG_RX_TRAPPED_TO_CPU);
return skb;
}
@@ -132,7 +148,7 @@ static void lan9303_flow_dissect(const struct sk_buff *skb, __be16 *proto,
int *offset)
{
*offset = LAN9303_TAG_LEN;
- *proto = *(__be16 *)(skb->data + 2);
+ *proto = lan9303_encap_proto(skb->data);
}
static const struct dsa_device_ops lan9303_netdev_ops = {
--
2.24.1
next prev parent reply other threads:[~2019-12-30 14:32 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-30 14:30 [PATCH RFC net-next 00/20] net: dsa: add GRO support Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 01/19] net: dsa: make .flow_dissect() callback returning void Alexander Lobakin
2019-12-30 18:11 ` Florian Fainelli
2019-12-30 14:30 ` [PATCH RFC net-next 02/19] net: dsa: add GRO support infrastructure Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 03/19] net: dsa: tag_ar9331: add .flow_dissect() callback Alexander Lobakin
2019-12-30 18:22 ` Florian Fainelli
2019-12-30 14:30 ` [PATCH RFC net-next 04/19] net: dsa: tag_ar9331: split out common tag accessors Alexander Lobakin
2019-12-30 17:18 ` Andrew Lunn
2019-12-30 14:30 ` [PATCH RFC net-next 05/19] net: dsa: tag_ar9331: add GRO callbacks Alexander Lobakin
2019-12-30 18:20 ` Florian Fainelli
2019-12-30 20:36 ` Andrew Lunn
2020-01-13 9:21 ` Alexander Lobakin
2020-01-13 9:42 ` Vladimir Oltean
2020-01-13 9:46 ` Alexander Lobakin
2020-01-13 10:28 ` Vladimir Oltean
2020-01-14 21:56 ` Florian Fainelli
2020-01-15 7:38 ` Alexander Lobakin
2020-01-15 11:29 ` Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 06/19] net: dsa: tag_gswip: fix typo in tag name Alexander Lobakin
2019-12-30 17:22 ` Andrew Lunn
2020-01-14 21:57 ` Florian Fainelli
2020-01-15 7:24 ` Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 07/19] net: dsa: tag_gswip: switch to bitfield helpers Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 08/19] net: dsa: tag_gswip: add .flow_dissect() callback Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 09/19] net: dsa: tag_gswip: split out common tag accessors Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 10/19] net: dsa: tag_gswip: add GRO callbacks Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 11/19] net: dsa: tag_lan9303: add .flow_dissect() callback Alexander Lobakin
2019-12-30 14:30 ` Alexander Lobakin [this message]
2019-12-30 14:30 ` [PATCH RFC net-next 13/19] net: dsa: tag_lan9303: add GRO callbacks Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 14/19] net: dsa: tag_mtk: split out common tag accessors Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 15/19] net: dsa: tag_mtk: add GRO callbacks Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 16/19] net: dsa: tag_qca: fix doubled Tx statistics Alexander Lobakin
2019-12-30 17:23 ` Andrew Lunn
2020-01-14 21:57 ` Florian Fainelli
2019-12-30 14:30 ` [PATCH RFC net-next 17/19] net: dsa: tag_qca: switch to bitfield helpers Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 18/19] net: dsa: tag_qca: split out common tag accessors Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 19/19] net: dsa: tag_qca: add GRO callbacks Alexander Lobakin
2019-12-30 14:30 ` [PATCH RFC net-next 20/20] net: core: add (unlikely) DSA support in napi_gro_frags() Alexander Lobakin
2019-12-30 17:12 ` [PATCH RFC net-next 00/20] net: dsa: add GRO support Andrew Lunn
2020-01-13 9:25 ` Alexander Lobakin
2019-12-31 15:32 ` Vladimir Oltean
2020-01-13 9:30 ` Alexander Lobakin
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