[PATCH 1/3] ethdev: add frequency adjustment API

[Mingjin Ye <mingjinx.ye@intel.com>]

This patch adds freq adjustment API for PTP high accuracy.

Signed-off-by: Simei Su <simei.su@intel.com>
Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
 doc/guides/nics/features.rst     |  4 +++-
 lib/ethdev/ethdev_driver.h       |  5 +++++
 lib/ethdev/ethdev_trace.h        |  9 +++++++++
 lib/ethdev/ethdev_trace_points.c |  3 +++
 lib/ethdev/rte_ethdev.c          | 18 ++++++++++++++++++
 lib/ethdev/rte_ethdev.h          | 19 +++++++++++++++++++
 lib/ethdev/version.map           |  1 +
 7 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index cd0115ffb3..0508f118fe 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -677,10 +677,12 @@ Supports IEEE1588/802.1AS timestamping.
 
 * **[implements] eth_dev_ops**: ``timesync_enable``, ``timesync_disable``
   ``timesync_read_rx_timestamp``, ``timesync_read_tx_timestamp``,
-  ``timesync_adjust_time``, ``timesync_read_time``, ``timesync_write_time``.
+  ``timesync_adjust_time``, ``timesync_adjust_freq``,
+  ``timesync_read_time``, ``timesync_write_time``.
 * **[related]    API**: ``rte_eth_timesync_enable()``, ``rte_eth_timesync_disable()``,
   ``rte_eth_timesync_read_rx_timestamp()``,
   ``rte_eth_timesync_read_tx_timestamp``, ``rte_eth_timesync_adjust_time()``,
+  ``rte_eth_timesync_adjust_freq()``,
   ``rte_eth_timesync_read_time()``, ``rte_eth_timesync_write_time()``.
 
 
diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index 883e59a927..68cadc14a5 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -664,6 +664,9 @@ typedef int (*eth_timesync_read_tx_timestamp_t)(struct rte_eth_dev *dev,
 /** @internal Function used to adjust the device clock. */
 typedef int (*eth_timesync_adjust_time)(struct rte_eth_dev *dev, int64_t);
 
+/** @internal Function used to adjust the clock frequency. */
+typedef int (*eth_timesync_adjust_freq)(struct rte_eth_dev *dev, int64_t);
+
 /** @internal Function used to get time from the device clock. */
 typedef int (*eth_timesync_read_time)(struct rte_eth_dev *dev,
 				      struct timespec *timestamp);
@@ -1378,6 +1381,8 @@ struct eth_dev_ops {
 	eth_timesync_read_tx_timestamp_t timesync_read_tx_timestamp;
 	/** Adjust the device clock */
 	eth_timesync_adjust_time   timesync_adjust_time;
+	/** Adjust the clock frequency */
+	eth_timesync_adjust_freq   timesync_adjust_freq;
 	/** Get the device clock time */
 	eth_timesync_read_time     timesync_read_time;
 	/** Set the device clock time */
diff --git a/lib/ethdev/ethdev_trace.h b/lib/ethdev/ethdev_trace.h
index 3bec87bfdb..e273d5853e 100644
--- a/lib/ethdev/ethdev_trace.h
+++ b/lib/ethdev/ethdev_trace.h
@@ -2183,6 +2183,15 @@ RTE_TRACE_POINT_FP(
 	rte_trace_point_emit_int(ret);
 )
 
+/* Called in loop in examples/ptpclient */
+RTE_TRACE_POINT_FP(
+	rte_eth_trace_timesync_adjust_freq,
+	RTE_TRACE_POINT_ARGS(uint16_t port_id, int64_t ppm, int ret),
+	rte_trace_point_emit_u16(port_id);
+	rte_trace_point_emit_i64(ppm);
+	rte_trace_point_emit_int(ret);
+)
+
 /* Called in loop in app/test-flow-perf */
 RTE_TRACE_POINT_FP(
 	rte_flow_trace_create,
diff --git a/lib/ethdev/ethdev_trace_points.c b/lib/ethdev/ethdev_trace_points.c
index 99e04f5893..a99fec0c1e 100644
--- a/lib/ethdev/ethdev_trace_points.c
+++ b/lib/ethdev/ethdev_trace_points.c
@@ -409,6 +409,9 @@ RTE_TRACE_POINT_REGISTER(rte_eth_trace_timesync_read_tx_timestamp,
 RTE_TRACE_POINT_REGISTER(rte_eth_trace_timesync_adjust_time,
 	lib.ethdev.timesync_adjust_time)
 
+RTE_TRACE_POINT_REGISTER(rte_eth_trace_timesync_adjust_freq,
+	lib.ethdev.timesync_adjust_freq)
+
 RTE_TRACE_POINT_REGISTER(rte_eth_trace_timesync_read_time,
 	lib.ethdev.timesync_read_time)
 
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index f1c658f49e..660eab2f1e 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -6310,6 +6310,24 @@ rte_eth_timesync_adjust_time(uint16_t port_id, int64_t delta)
 	return ret;
 }
 
+int
+rte_eth_timesync_adjust_freq(uint16_t port_id, int64_t ppm)
+{
+	struct rte_eth_dev *dev;
+	int ret;
+
+	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+	dev = &rte_eth_devices[port_id];
+
+	if (*dev->dev_ops->timesync_adjust_freq == NULL)
+		return -ENOTSUP;
+	ret = eth_err(port_id, (*dev->dev_ops->timesync_adjust_freq)(dev, ppm));
+
+	rte_eth_trace_timesync_adjust_freq(port_id, ppm, ret);
+
+	return ret;
+}
+
 int
 rte_eth_timesync_read_time(uint16_t port_id, struct timespec *timestamp)
 {
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index 548fada1c7..42fa2ca39c 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -5297,6 +5297,25 @@ int rte_eth_timesync_read_tx_timestamp(uint16_t port_id,
  */
 int rte_eth_timesync_adjust_time(uint16_t port_id, int64_t delta);
 
+/**
+ * Adjust the clock increment rate on an Ethernet device.
+ *
+ * This is usually used in conjunction with other Ethdev timesync functions to
+ * synchronize the device time using the IEEE1588/802.1AS protocol.
+ *
+ * @param port_id
+ *  The port identifier of the Ethernet device.
+ * @param ppm
+ *  Parts per million with 16-bit fractional field
+ *
+ * @return
+ *   - 0: Success.
+ *   - -ENODEV: The port ID is invalid.
+ *   - -EIO: if device is removed.
+ *   - -ENOTSUP: The function is not supported by the Ethernet driver.
+ */
+int rte_eth_timesync_adjust_freq(uint16_t port_id, int64_t ppm);
+
 /**
  * Read the time from the timesync clock on an Ethernet device.
  *
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index 1669055ca5..7f751b5685 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -106,6 +106,7 @@ DPDK_25 {
 	rte_eth_stats_get;
 	rte_eth_stats_reset;
 	rte_eth_timesync_adjust_time;
+	rte_eth_timesync_adjust_freq;
 	rte_eth_timesync_disable;
 	rte_eth_timesync_enable;
 	rte_eth_timesync_read_rx_timestamp;
-- 
2.25.1