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Date: Tue, 6 Dec 2022 14:44:27 +0530
From: Arun Ramadoss <arun.ramadoss@...rochip.com>
To: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC: <woojung.huh@...rochip.com>, <UNGLinuxDriver@...rochip.com>,
<andrew@...n.ch>, <vivien.didelot@...il.com>,
<f.fainelli@...il.com>, <olteanv@...il.com>, <davem@...emloft.net>,
<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
<linux@...linux.org.uk>, <Tristram.Ha@...rochip.com>,
<richardcochran@...il.com>, <ceggers@...i.de>
Subject: [Patch net-next v2 12/13] net: dsa: microchip: ptp: lan937x: add 2 step timestamping
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@...rochip.com>
---
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_common.c | 1 +
drivers/net/dsa/microchip/ksz_ptp.c | 36 ++++++++++++++++++++++++++
drivers/net/dsa/microchip/ksz_ptp.h | 3 +++
include/linux/dsa/ksz_common.h | 1 +
net/dsa/tag_ksz.c | 14 ++++++++++
5 files changed, 55 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 3b578a4a33de..91f998fab231 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -2462,6 +2462,7 @@ static int ksz_connect_tag_protocol(struct dsa_switch *ds,
tagger_data = ksz_tagger_data(ds);
tagger_data->xmit_work_fn = ksz_port_deferred_xmit;
tagger_data->meta_tstamp_handler = ksz_tstamp_reconstruct;
+ tagger_data->is_ptp_twostep = ksz_is_ptp_twostep;
return 0;
}
diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c
index 25b0f09753ce..8392962311e2 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.c
+++ b/drivers/net/dsa/microchip/ksz_ptp.c
@@ -329,6 +329,9 @@ 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) |
@@ -356,6 +359,8 @@ 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;
@@ -371,6 +376,25 @@ 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;
@@ -403,6 +427,14 @@ static int ksz_set_hwtstamp_config(struct ksz_device *dev,
return ksz_ptp_enable_mode(dev);
}
+bool ksz_is_ptp_twostep(struct dsa_switch *ds, unsigned int port)
+{
+ struct ksz_device *dev = ds->priv;
+ struct ksz_port *prt = &dev->ports[port];
+
+ return (prt->tstamp_config.tx_type == HWTSTAMP_TX_ON);
+}
+
int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr)
{
struct ksz_device *dev = ds->priv;
@@ -451,6 +483,10 @@ 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:
diff --git a/drivers/net/dsa/microchip/ksz_ptp.h b/drivers/net/dsa/microchip/ksz_ptp.h
index 5a71c826c7d8..abad072b7032 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.h
+++ b/drivers/net/dsa/microchip/ksz_ptp.h
@@ -46,6 +46,7 @@ int ksz_ptp_irq_setup(struct dsa_switch *ds, u8 p);
void ksz_ptp_irq_free(struct dsa_switch *ds, u8 p);
void ksz_port_deferred_xmit(struct kthread_work *work);
ktime_t ksz_tstamp_reconstruct(struct dsa_switch *ds, ktime_t tstamp);
+bool ksz_is_ptp_twostep(struct dsa_switch *ds, unsigned int port);
#else
@@ -80,6 +81,8 @@ static inline void ksz_ptp_irq_free(struct dsa_switch *ds, u8 p) {}
#define ksz_port_deferred_xmit NULL
+#define ksz_is_ptp_twostep NULL
+
#endif /* End of CONFIG_NET_DSA_MICROCHIP_KSZ_PTP */
#endif
diff --git a/include/linux/dsa/ksz_common.h b/include/linux/dsa/ksz_common.h
index b180eb3429bd..be1a850c82fb 100644
--- a/include/linux/dsa/ksz_common.h
+++ b/include/linux/dsa/ksz_common.h
@@ -33,6 +33,7 @@ struct ksz_tagger_data {
void (*xmit_work_fn)(struct kthread_work *work);
void (*hwtstamp_set_state)(struct dsa_switch *ds, bool on);
ktime_t (*meta_tstamp_handler)(struct dsa_switch *ds, ktime_t tstamp);
+ bool (*is_ptp_twostep)(struct dsa_switch *ds, unsigned int port);
};
struct ksz_skb_cb {
diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index e57066f3947e..e2aa438437a0 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -216,6 +216,12 @@ static void ksz_rcv_timestamp(struct sk_buff *skb, u8 *tag,
if (!ptp_hdr)
return;
+ if (!tagger_data->is_ptp_twostep)
+ return;
+
+ if (tagger_data->is_ptp_twostep(ds, port))
+ return;
+
ptp_msg_type = ptp_get_msgtype(ptp_hdr, ptp_type);
if (ptp_msg_type != PTP_MSGTYPE_PDELAY_REQ)
return;
@@ -237,6 +243,7 @@ static void ksz_rcv_timestamp(struct sk_buff *skb, u8 *tag,
static void ksz_xmit_timestamp(struct dsa_port *dp, struct sk_buff *skb)
{
struct sk_buff *clone = KSZ_SKB_CB(skb)->clone;
+ struct ksz_tagger_data *tagger_data;
struct ksz_tagger_private *priv;
struct ptp_header *ptp_hdr;
unsigned int ptp_type;
@@ -252,6 +259,13 @@ static void ksz_xmit_timestamp(struct dsa_port *dp, struct sk_buff *skb)
if (!clone)
goto output_tag;
+ tagger_data = ksz_tagger_data(dp->ds);
+ if (!tagger_data->is_ptp_twostep)
+ goto output_tag;
+
+ if (tagger_data->is_ptp_twostep(dp->ds, dp->index))
+ goto output_tag;
+
ptp_type = KSZ_SKB_CB(clone)->ptp_type;
if (ptp_type == PTP_CLASS_NONE)
goto output_tag;
--
2.36.1
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