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dpaa2-switch: add support for imprecise source port

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Switch ports configured as part of a LAG group are not able to provide
a precise source port for all packets which reach the control interface.

The only frames which will have a precise source port are those that are
explicitly trapped, for example STP and LCAP frames. For any other
frames (for example, those which are flooded) we can only know the
ingress LAG group.

Take into account the DPAA2_ETHSW_FLC_IMPRECISE_IF_ID bit and based on
its value target the bond device or the specific source netdevice.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://patch.msgid.link/20260629112309.154328-14-ioana.ciornei@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Ioana Ciornei
2026-06-29 14:23:09 +03:00
committed by Paolo Abeni
parent a0a8970b51
commit f985358f4e
2 changed files with 16 additions and 2 deletions
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15
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
View File

@@ -3120,19 +3120,22 @@ static void dpaa2_switch_rx(struct dpaa2_switch_fq *fq,
dma_addr_t addr = dpaa2_fd_get_addr(fd);
struct ethsw_core *ethsw = fq->ethsw;
struct ethsw_port_priv *port_priv;
struct dpaa2_switch_lag *lag;
struct net_device *netdev;
struct vlan_ethhdr *hdr;
struct sk_buff *skb;
u16 vlan_tci, vid;
int if_id, err;
void *vaddr;
u64 flc;
vaddr = dpaa2_iova_to_virt(ethsw->iommu_domain, addr);
dma_unmap_page(ethsw->dev, addr, DPAA2_SWITCH_RX_BUF_SIZE,
DMA_FROM_DEVICE);
/* get switch ingress interface ID */
if_id = upper_32_bits(dpaa2_fd_get_flc(fd)) & 0x0000FFFF;
flc = dpaa2_fd_get_flc(fd);
if_id = DPAA2_ETHSW_FLC_IF_ID(flc);
if (if_id >= ethsw->sw_attr.num_ifs) {
dev_err(ethsw->dev, "Frame received from unknown interface!\n");
goto err_free_fd;
@@ -3171,12 +3174,20 @@ static void dpaa2_switch_rx(struct dpaa2_switch_fq *fq,
}
}
skb->dev = netdev;
rcu_read_lock();
lag = rcu_dereference(port_priv->lag);
if (DPAA2_ETHSW_FLC_IMPRECISE_IF_ID(flc) && lag)
skb->dev = lag->bond_dev;
else
skb->dev = netdev;
skb->protocol = eth_type_trans(skb, skb->dev);
/* Setup the offload_fwd_mark only if the port is under a bridge */
skb->offload_fwd_mark = !!(port_priv->fdb->bridge_dev);
rcu_read_unlock();
netif_receive_skb(skb);
return;

3
drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.h
View File

@@ -87,6 +87,9 @@
#define DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE 256
#define DPAA2_ETHSW_FLC_IF_ID(flc) (((flc) >> 32) & GENMASK(15, 0))
#define DPAA2_ETHSW_FLC_IMPRECISE_IF_ID(flc) ((flc) & BIT_ULL(63))
extern const struct ethtool_ops dpaa2_switch_port_ethtool_ops;
struct ethsw_core;