mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 06:46:59 +07:00
127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
|
/*
|
||
|
|
* PTP 1588 clock support - support for timestamping in PHY devices
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 OMICRON electronics GmbH
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
|
*/
|
||
|
|
#include <linux/errqueue.h>
|
||
|
|
#include <linux/phy.h>
|
||
|
|
#include <linux/ptp_classify.h>
|
||
|
|
#include <linux/skbuff.h>
|
||
|
|
|
||
|
|
static struct sock_filter ptp_filter[] = {
|
||
|
|
PTP_FILTER
|
||
|
|
};
|
||
|
|
|
||
|
|
static unsigned int classify(struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
if (likely(skb->dev &&
|
||
|
|
skb->dev->phydev &&
|
||
|
|
skb->dev->phydev->drv))
|
||
|
|
return sk_run_filter(skb, ptp_filter, ARRAY_SIZE(ptp_filter));
|
||
|
|
else
|
||
|
|
return PTP_CLASS_NONE;
|
||
|
|
}
|
||
|
|
|
||
|
|
void skb_clone_tx_timestamp(struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
struct phy_device *phydev;
|
||
|
|
struct sk_buff *clone;
|
||
|
|
struct sock *sk = skb->sk;
|
||
|
|
unsigned int type;
|
||
|
|
|
||
|
|
if (!sk)
|
||
|
|
return;
|
||
|
|
|
||
|
|
type = classify(skb);
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case PTP_CLASS_V1_IPV4:
|
||
|
|
case PTP_CLASS_V1_IPV6:
|
||
|
|
case PTP_CLASS_V2_IPV4:
|
||
|
|
case PTP_CLASS_V2_IPV6:
|
||
|
|
case PTP_CLASS_V2_L2:
|
||
|
|
case PTP_CLASS_V2_VLAN:
|
||
|
|
phydev = skb->dev->phydev;
|
||
|
|
if (likely(phydev->drv->txtstamp)) {
|
||
|
|
clone = skb_clone(skb, GFP_ATOMIC);
|
||
|
|
if (!clone)
|
||
|
|
return;
|
||
|
|
clone->sk = sk;
|
||
|
|
phydev->drv->txtstamp(phydev, clone, type);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void skb_complete_tx_timestamp(struct sk_buff *skb,
|
||
|
|
struct skb_shared_hwtstamps *hwtstamps)
|
||
|
|
{
|
||
|
|
struct sock *sk = skb->sk;
|
||
|
|
struct sock_exterr_skb *serr;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (!hwtstamps)
|
||
|
|
return;
|
||
|
|
|
||
|
|
*skb_hwtstamps(skb) = *hwtstamps;
|
||
|
|
serr = SKB_EXT_ERR(skb);
|
||
|
|
memset(serr, 0, sizeof(*serr));
|
||
|
|
serr->ee.ee_errno = ENOMSG;
|
||
|
|
serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
|
||
|
|
skb->sk = NULL;
|
||
|
|
err = sock_queue_err_skb(sk, skb);
|
||
|
|
if (err)
|
||
|
|
kfree_skb(skb);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(skb_complete_tx_timestamp);
|
||
|
|
|
||
|
|
bool skb_defer_rx_timestamp(struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
struct phy_device *phydev;
|
||
|
|
unsigned int type;
|
||
|
|
|
||
|
|
skb_push(skb, ETH_HLEN);
|
||
|
|
|
||
|
|
type = classify(skb);
|
||
|
|
|
||
|
|
skb_pull(skb, ETH_HLEN);
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case PTP_CLASS_V1_IPV4:
|
||
|
|
case PTP_CLASS_V1_IPV6:
|
||
|
|
case PTP_CLASS_V2_IPV4:
|
||
|
|
case PTP_CLASS_V2_IPV6:
|
||
|
|
case PTP_CLASS_V2_L2:
|
||
|
|
case PTP_CLASS_V2_VLAN:
|
||
|
|
phydev = skb->dev->phydev;
|
||
|
|
if (likely(phydev->drv->rxtstamp))
|
||
|
|
return phydev->drv->rxtstamp(phydev, skb, type);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init skb_timestamping_init(void)
|
||
|
|
{
|
||
|
|
BUG_ON(sk_chk_filter(ptp_filter, ARRAY_SIZE(ptp_filter)));
|
||
|
|
}
|