LAN937x series of switches support 2 step timestamping mechanism. There
are timestamp correction calculation performed in ksz_rcv_timestamp and
ksz_xmit_timestamp which are applicable only for p2p1step. To check
whether the 2 step is enabled or not in tag_ksz.c introduced the helper
function in taggger_data to query it from ksz_ptp.c. Based on whether 2
step is enabled or not, timestamp calculation are performed.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
v3 -> v4
- P2P_1step bit is set which is required for P2P. It is missed during
patch v3 regression.
v2 -> v3
- Reverted setting PTP_1Step bit as we are setting 802_1AS bit
v1 -> v2
- declard is_ptp_twostep as macro NULL for ptp disabled case
- Moved the patch in series to have continuity for lan937x updates 9/11
to 12/13
- enable PTP_1STEP bit based on tx timestamping
Patch v1
- Patch is new.
---
drivers/net/dsa/microchip/ksz_ptp.c | 37 ++++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
@@ -283,6 +283,9 @@ int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts)
ts->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ONESTEP_P2P);
+ if (is_lan937x(dev))
+ ts->tx_types |= BIT(HWTSTAMP_TX_ON);
+
ts->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
@@ -310,6 +313,8 @@ static int ksz_set_hwtstamp_config(struct ksz_device *dev,
struct ksz_port *prt,
struct hwtstamp_config *config)
{
+ int ret;
+
if (config->flags)
return -EINVAL;
@@ -325,6 +330,25 @@ static int ksz_set_hwtstamp_config(struct ksz_device *dev,
prt->ptpmsg_irq[KSZ_XDREQ_MSG].ts_en = 1;
prt->ptpmsg_irq[KSZ_PDRES_MSG].ts_en = 0;
prt->hwts_tx_en = true;
+
+ ret = ksz_rmw16(dev, REG_PTP_MSG_CONF1, PTP_1STEP, PTP_1STEP);
+ if (ret)
+ return ret;
+
+ break;
+ case HWTSTAMP_TX_ON:
+ if (!is_lan937x(dev))
+ return -ERANGE;
+
+ prt->ptpmsg_irq[KSZ_SYNC_MSG].ts_en = 1;
+ prt->ptpmsg_irq[KSZ_XDREQ_MSG].ts_en = 1;
+ prt->ptpmsg_irq[KSZ_PDRES_MSG].ts_en = 1;
+ prt->hwts_tx_en = true;
+
+ ret = ksz_rmw16(dev, REG_PTP_MSG_CONF1, PTP_1STEP, 0);
+ if (ret)
+ return ret;
+
break;
default:
return -ERANGE;
@@ -412,14 +436,20 @@ bool ksz_port_rxtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb,
struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
struct ksz_device *dev = ds->priv;
struct ptp_header *ptp_hdr;
+ struct ksz_port *prt;
u8 ptp_msg_type;
ktime_t tstamp;
s64 correction;
+ prt = &dev->ports[port];
+
tstamp = KSZ_SKB_CB(skb)->tstamp;
memset(hwtstamps, 0, sizeof(*hwtstamps));
hwtstamps->hwtstamp = ksz_tstamp_reconstruct(dev, tstamp);
+ if (prt->tstamp_config.tx_type != HWTSTAMP_TX_ONESTEP_P2P)
+ goto out;
+
ptp_hdr = ptp_parse_header(skb, type);
if (!ptp_hdr)
goto out;
@@ -468,6 +498,10 @@ void ksz_port_txtstamp(struct dsa_switch *ds, int port,
ptp_msg_type = ptp_get_msgtype(hdr, type);
switch (ptp_msg_type) {
+ case PTP_MSGTYPE_SYNC:
+ if (prt->tstamp_config.tx_type == HWTSTAMP_TX_ONESTEP_P2P)
+ return;
+ fallthrough;
case PTP_MSGTYPE_PDELAY_REQ:
fallthrough;
case PTP_MSGTYPE_PDELAY_RESP:
@@ -484,7 +518,8 @@ void ksz_port_txtstamp(struct dsa_switch *ds, int port,
/* caching the value to be used in tag_ksz.c */
KSZ_SKB_CB(skb)->clone = clone;
KSZ_SKB_CB(clone)->ptp_type = type;
- if (ptp_msg_type == PTP_MSGTYPE_PDELAY_RESP)
+ if (ptp_msg_type == PTP_MSGTYPE_PDELAY_RESP &&
+ prt->tstamp_config.tx_type == HWTSTAMP_TX_ONESTEP_P2P)
KSZ_SKB_CB(clone)->update_correction = true;
}