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Message-ID: <20221206091428.28285-3-arun.ramadoss@microchip.com>
Date: Tue, 6 Dec 2022 14:44:17 +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 02/13] net: dsa: microchip: ptp: Initial hardware time stamping support
From: Christian Eggers <ceggers@...i.de>
This patch adds the routine for get_ts_info, hwstamp_get, set. This enables
the PTP support towards userspace applications such as linuxptp.
Signed-off-by: Christian Eggers <ceggers@...i.de>
Co-developed-by: Arun Ramadoss <arun.ramadoss@...rochip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@...rochip.com>
---
v1 -> v2
- Declared the ksz_hwtstamp_get/set to NULL as macro if ptp is not
enabled
- Removed mutex lock in hwtstamp_set()
RFC v2 -> Patch v1
- moved tagger set and get function to separate patch
- Removed unnecessary comments
---
drivers/net/dsa/microchip/ksz_common.c | 3 +
drivers/net/dsa/microchip/ksz_common.h | 3 +
drivers/net/dsa/microchip/ksz_ptp.c | 101 +++++++++++++++++++++++++
drivers/net/dsa/microchip/ksz_ptp.h | 11 +++
4 files changed, 118 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index da717feca30a..7b85b258270c 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -2872,6 +2872,9 @@ static const struct dsa_switch_ops ksz_switch_ops = {
.get_pause_stats = ksz_get_pause_stats,
.port_change_mtu = ksz_change_mtu,
.port_max_mtu = ksz_max_mtu,
+ .get_ts_info = ksz_get_ts_info,
+ .port_hwtstamp_get = ksz_hwtstamp_get,
+ .port_hwtstamp_set = ksz_hwtstamp_set,
};
struct ksz_device *ksz_switch_alloc(struct device *base, void *priv)
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 78b4101553c6..461553191218 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -103,6 +103,9 @@ struct ksz_port {
struct ksz_device *ksz_dev;
struct ksz_irq pirq;
u8 num;
+#if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_PTP)
+ struct hwtstamp_config tstamp_config;
+#endif
};
struct ksz_device {
diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c
index 68b1770da6ca..b2b3fe1ce65d 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.c
+++ b/drivers/net/dsa/microchip/ksz_ptp.c
@@ -24,6 +24,107 @@
#define KSZ_PTP_INC_NS 40 /* HW clock is incremented every 40 ns (by 40) */
#define KSZ_PTP_SUBNS_BITS 32
+/* The function is return back the capability of timestamping feature when
+ * requested through ethtool -T <interface> utility
+ */
+int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts)
+{
+ struct ksz_device *dev = ds->priv;
+ struct ksz_ptp_data *ptp_data;
+
+ ptp_data = &dev->ptp_data;
+
+ if (!ptp_data->clock)
+ return -ENODEV;
+
+ ts->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
+ SOF_TIMESTAMPING_RX_HARDWARE |
+ SOF_TIMESTAMPING_RAW_HARDWARE;
+
+ ts->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ONESTEP_P2P);
+
+ ts->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
+ BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
+ BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
+ BIT(HWTSTAMP_FILTER_PTP_V2_EVENT);
+
+ ts->phc_index = ptp_clock_index(ptp_data->clock);
+
+ return 0;
+}
+
+int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr)
+{
+ struct ksz_device *dev = ds->priv;
+ struct hwtstamp_config *config;
+ struct ksz_port *prt;
+
+ prt = &dev->ports[port];
+ config = &prt->tstamp_config;
+
+ return copy_to_user(ifr->ifr_data, config, sizeof(*config)) ?
+ -EFAULT : 0;
+}
+
+static int ksz_set_hwtstamp_config(struct ksz_device *dev,
+ struct hwtstamp_config *config)
+{
+ if (config->flags)
+ return -EINVAL;
+
+ switch (config->tx_type) {
+ case HWTSTAMP_TX_OFF:
+ case HWTSTAMP_TX_ONESTEP_P2P:
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ switch (config->rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+ config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
+ config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+ break;
+ default:
+ config->rx_filter = HWTSTAMP_FILTER_NONE;
+ return -ERANGE;
+ }
+
+ return 0;
+}
+
+int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr)
+{
+ struct ksz_device *dev = ds->priv;
+ struct hwtstamp_config config;
+ struct ksz_port *prt;
+ int ret;
+
+ prt = &dev->ports[port];
+
+ ret = copy_from_user(&config, ifr->ifr_data, sizeof(config));
+ if (ret)
+ return ret;
+
+ ret = ksz_set_hwtstamp_config(dev, &config);
+ if (ret)
+ return ret;
+
+ memcpy(&prt->tstamp_config, &config, sizeof(config));
+
+ return copy_to_user(ifr->ifr_data, &config, sizeof(config));
+}
+
static int _ksz_ptp_gettime(struct ksz_device *dev, struct timespec64 *ts)
{
u32 nanoseconds;
diff --git a/drivers/net/dsa/microchip/ksz_ptp.h b/drivers/net/dsa/microchip/ksz_ptp.h
index 8930047da764..7bb3fde2dd14 100644
--- a/drivers/net/dsa/microchip/ksz_ptp.h
+++ b/drivers/net/dsa/microchip/ksz_ptp.h
@@ -23,6 +23,11 @@ int ksz_ptp_clock_register(struct dsa_switch *ds);
void ksz_ptp_clock_unregister(struct dsa_switch *ds);
+int ksz_get_ts_info(struct dsa_switch *ds, int port,
+ struct ethtool_ts_info *ts);
+int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr);
+int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr);
+
#else
struct ksz_ptp_data {
@@ -37,6 +42,12 @@ static inline int ksz_ptp_clock_register(struct dsa_switch *ds)
static inline void ksz_ptp_clock_unregister(struct dsa_switch *ds) { }
+#define ksz_get_ts_info NULL
+
+#define ksz_hwtstamp_get NULL
+
+#define ksz_hwtstamp_set NULL
+
#endif /* End of CONFIG_NET_DSA_MICROCHIP_KSZ_PTP */
#endif
--
2.36.1
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