net: dsa: microchip: ptp: Initial hardware time stamping support

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@arri.de>
Co-developed-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 3e2ebad..1dddb80 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -2977,6 +2977,9 @@ 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 23ed7fa..a5ce7ec 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -102,6 +102,9 @@ 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 fb1efb6..6f67476 100644 (file)
--- 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 40ULL  /* 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 8930047..7bb3fde 100644 (file)
--- 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