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net: enetc: fix incorrect TPID when receiving 802.1ad tagged packets 

When the enetc ports have rx-vlan-offload enabled, they report a TPID of
ETH_P_8021Q regardless of what was actually in the packet. When
rx-vlan-offload is disabled, packets have the proper TPID. Fix this
inconsistency by finishing the TODO left in the code.

Fixes: d4fd0404c1 ("enetc: Introduce basic PF and VF ENETC ethernet drivers")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
rM2-mainline
Vladimir Oltean 2021-03-01 13:18:14 +02:00 committed by David S. Miller
parent 6d36ecdbc4
commit 827b6fd046
2 changed files with 29 additions and 8 deletions
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34
drivers/net/ethernet/freescale/enetc/enetc.c
View File

@ -523,9 +523,8 @@ static void enetc_get_rx_tstamp(struct net_device *ndev,
static void enetc_get_offloads(struct enetc_bdr *rx_ring,
union enetc_rx_bd *rxbd, struct sk_buff *skb)
{
#ifdef CONFIG_FSL_ENETC_PTP_CLOCK
struct enetc_ndev_priv *priv = netdev_priv(rx_ring->ndev);
#endif
/* TODO: hashing */
if (rx_ring->ndev->features & NETIF_F_RXCSUM) {
u16 inet_csum = le16_to_cpu(rxbd->r.inet_csum);
@ -534,12 +533,31 @@ static void enetc_get_offloads(struct enetc_bdr *rx_ring,
skb->ip_summed = CHECKSUM_COMPLETE;
}
/* copy VLAN to skb, if one is extracted, for now we assume it's a
* standard TPID, but HW also supports custom values
*/
if (le16_to_cpu(rxbd->r.flags) & ENETC_RXBD_FLAG_VLAN)
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
le16_to_cpu(rxbd->r.vlan_opt));
if (le16_to_cpu(rxbd->r.flags) & ENETC_RXBD_FLAG_VLAN) {
__be16 tpid = 0;
switch (le16_to_cpu(rxbd->r.flags) & ENETC_RXBD_FLAG_TPID) {
case 0:
tpid = htons(ETH_P_8021Q);
break;
case 1:
tpid = htons(ETH_P_8021AD);
break;
case 2:
tpid = htons(enetc_port_rd(&priv->si->hw,
ENETC_PCVLANR1));
break;
case 3:
tpid = htons(enetc_port_rd(&priv->si->hw,
ENETC_PCVLANR2));
break;
default:
break;
}
__vlan_hwaccel_put_tag(skb, tpid, le16_to_cpu(rxbd->r.vlan_opt));
}
#ifdef CONFIG_FSL_ENETC_PTP_CLOCK
if (priv->active_offloads & ENETC_F_RX_TSTAMP)
enetc_get_rx_tstamp(rx_ring->ndev, rxbd, skb);

3
drivers/net/ethernet/freescale/enetc/enetc_hw.h
View File

@ -172,6 +172,8 @@ enum enetc_bdr_type {TX, RX};
#define ENETC_PSIPMAR0(n) (0x0100 + (n) * 0x8) /* n = SI index */
#define ENETC_PSIPMAR1(n) (0x0104 + (n) * 0x8)
#define ENETC_PVCLCTR 0x0208
#define ENETC_PCVLANR1 0x0210
#define ENETC_PCVLANR2 0x0214
#define ENETC_VLAN_TYPE_C BIT(0)
#define ENETC_VLAN_TYPE_S BIT(1)
#define ENETC_PVCLCTR_OVTPIDL(bmp) ((bmp) & 0xff) /* VLAN_TYPE */
@ -570,6 +572,7 @@ union enetc_rx_bd {
#define ENETC_RXBD_LSTATUS(flags) ((flags) << 16)
#define ENETC_RXBD_FLAG_VLAN BIT(9)
#define ENETC_RXBD_FLAG_TSTMP BIT(10)
#define ENETC_RXBD_FLAG_TPID GENMASK(1, 0)
#define ENETC_MAC_ADDR_FILT_CNT 8 /* # of supported entries per port */
#define EMETC_MAC_ADDR_FILT_RES 3 /* # of reserved entries at the beginning */