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net: dsa: allow rcv() and xmit() to be optional

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Allow rcv() and xmit() dsa driver ops to be optional in case a driver
does not care to mangle a packet as in U-Boot only one network port is
enabled at a time and thus no packet mangling is necessary.

Suggested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey 2022-11-30 09:42:47 -08:00 committed by Tom Rini
parent 43c2a00a14
commit 54d11e2019
1 changed files with 15 additions and 13 deletions
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28
net/dsa-uclass.c
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@ -142,20 +142,22 @@ static int dsa_port_send(struct udevice *pdev, void *packet, int length)
struct dsa_port_pdata *port_pdata;
int err;
if (length + head + tail > PKTSIZE_ALIGN)
return -EINVAL;
if (ops->xmit) {
if (length + head + tail > PKTSIZE_ALIGN)
return -EINVAL;
memset(dsa_packet_tmp, 0, head);
memset(dsa_packet_tmp + head + length, 0, tail);
memcpy(dsa_packet_tmp + head, packet, length);
length += head + tail;
/* copy back to preserve original buffer alignment */
memcpy(packet, dsa_packet_tmp, length);
memset(dsa_packet_tmp, 0, head);
memset(dsa_packet_tmp + head + length, 0, tail);
memcpy(dsa_packet_tmp + head, packet, length);
length += head + tail;
/* copy back to preserve original buffer alignment */
memcpy(packet, dsa_packet_tmp, length);
port_pdata = dev_get_parent_plat(pdev);
err = ops->xmit(dev, port_pdata->index, packet, length);
if (err)
return err;
port_pdata = dev_get_parent_plat(pdev);
err = ops->xmit(dev, port_pdata->index, packet, length);
if (err)
return err;
}
return eth_get_ops(master)->send(master, packet, length);
}
@ -172,7 +174,7 @@ static int dsa_port_recv(struct udevice *pdev, int flags, uchar **packetp)
int length, port_index, err;
length = eth_get_ops(master)->recv(master, flags, packetp);
if (length <= 0)
if (length <= 0 || !ops->rcv)
return length;
/*