Re: [dpdk-dev] [PATCH] net/ixgbe: fixed port can not link up in FreeBSD

Re: [dpdk-dev] [PATCH] net/ixgbe: fixed port can not link up in FreeBSD

[Ananyev, Konstantin]

Hi,

> 
> In FreeBSD environment, nic_uio drivers do not support interrupts,
> rte_intr_callback_register() will fail to register interrupts.
> We can not make link status to change from down to up by interrupt
> callback. So we need to wait for the controller to acquire link
> when ports start. Through multiple tests, 5s should be enough.
> 
> Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
> index 2c6fd0f13..e33b5483c 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -2555,6 +2555,9 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
>  		IXGBE_DEV_PRIVATE_TO_TM_CONF(dev->data->dev_private);
>  	struct ixgbe_macsec_setting *macsec_setting =
>  		IXGBE_DEV_PRIVATE_TO_MACSEC_SETTING(dev->data->dev_private);
> +#ifdef RTE_EXEC_ENV_FREEBSD
> +	int i;
> +#endif
> 
>  	PMD_INIT_FUNC_TRACE();
> 
> @@ -2801,6 +2804,25 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
>  			    "please call hierarchy_commit() "
>  			    "before starting the port");
> 
> +#ifdef RTE_EXEC_ENV_FREEBSD
> +	/*
> +	 * In freebsd environment, nic_uio drivers do not support interrupts,
> +	 * rte_intr_callback_register() will fail to register interrupts.
> +	 * We can not make link status to change from down to up by interrupt
> +	 * callback. So we need to wait for the controller to acquire link
> +	 * when ports start.
> +	 */
> +	for (i = 0; i < 25; i++) {
> +		/* If link up, just jump out */
> +		err = ixgbe_check_link(hw, &speed, &link_up, 0);
> +		if (err)
> +			goto error;
> +		if (link_up)
> +			break;
> +		msec_delay(200);
> +	}
> +#endif

Might be better to put it into a separate function to keep start() code clean.
Konstantin

> +
>  	/*
>  	 * Update link status right before return, because it may
>  	 * start link configuration process in a separate thread.
> --
> 2.17.1

[dpdk-dev] [PATCH] net/ixgbe: fixed port can not link up in FreeBSD

[Lunyuan Cui]

In FreeBSD environment, nic_uio drivers do not support interrupts,
rte_intr_callback_register() will fail to register interrupts.
We can not make link status to change from down to up by interrupt
callback. So we need to wait for the controller to acquire link
when ports start. Through multiple tests, 5s should be enough.

Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
Cc: stable@dpdk.org

Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 2c6fd0f13..e33b5483c 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2555,6 +2555,9 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 		IXGBE_DEV_PRIVATE_TO_TM_CONF(dev->data->dev_private);
 	struct ixgbe_macsec_setting *macsec_setting =
 		IXGBE_DEV_PRIVATE_TO_MACSEC_SETTING(dev->data->dev_private);
+#ifdef RTE_EXEC_ENV_FREEBSD
+	int i;
+#endif
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -2801,6 +2804,25 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 			    "please call hierarchy_commit() "
 			    "before starting the port");
 
+#ifdef RTE_EXEC_ENV_FREEBSD
+	/*
+	 * In freebsd environment, nic_uio drivers do not support interrupts,
+	 * rte_intr_callback_register() will fail to register interrupts.
+	 * We can not make link status to change from down to up by interrupt
+	 * callback. So we need to wait for the controller to acquire link
+	 * when ports start.
+	 */
+	for (i = 0; i < 25; i++) {
+		/* If link up, just jump out */
+		err = ixgbe_check_link(hw, &speed, &link_up, 0);
+		if (err)
+			goto error;
+		if (link_up)
+			break;
+		msec_delay(200);
+	}
+#endif
+
 	/*
 	 * Update link status right before return, because it may
 	 * start link configuration process in a separate thread.
-- 
2.17.1

[dpdk-dev] [PATCH v2] net/ixgbe: fixed port can not link up in FreeBSD

[Lunyuan Cui]

In FreeBSD environment, nic_uio drivers do not support interrupts,
rte_intr_callback_register() will fail to register interrupts.
We can not make link status to change from down to up by interrupt
callback. So we need to wait for the controller to acquire link
when ports start. Through multiple tests, 5s should be enough.

Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
Cc: stable@dpdk.org

Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
---

v2 changes:
* Put waiting into a separate function to keep start() code clean.
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 32 ++++++++++++++++++++++++++++++++
 drivers/net/ixgbe/ixgbe_ethdev.h |  3 +++
 2 files changed, 35 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 2c6fd0f13..fba666186 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2801,6 +2801,13 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 			    "please call hierarchy_commit() "
 			    "before starting the port");
 
+#ifdef RTE_EXEC_ENV_FREEBSD
+	/* wait for the controller to acquire link */
+	err = ixgbe_wait_for_link_up(hw);
+	if (err)
+		goto error;
+#endif
+
 	/*
 	 * Update link status right before return, because it may
 	 * start link configuration process in a separate thread.
@@ -4114,6 +4121,31 @@ ixgbe_dev_setup_link_alarm_handler(void *param)
 	intr->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
 }
 
+#ifdef RTE_EXEC_ENV_FREEBSD
+/*
+ * In freebsd environment, nic_uio drivers do not support interrupts,
+ * rte_intr_callback_register() will fail to register interrupts.
+ * We can not make link status to change from down to up by interrupt
+ * callback. So we need to wait for the controller to acquire link
+ * when ports start.
+ * It returns 0 on link up.
+ */
+int32_t ixgbe_wait_for_link_up(struct ixgbe_hw *hw)
+{
+	int err, i, link_up = 0;
+	uint32_t speed = 0;
+	for (i = 0; i < 25; i++) {
+		err = ixgbe_check_link(hw, &speed, &link_up, 0);
+		if (err)
+			return err;
+		if (link_up)
+			return 0;
+		msec_delay(200);
+	}
+	return 0;
+}
+#endif
+
 /* return 0 means link status changed, -1 means not changed */
 int
 ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index 76a1b9d18..9a1d8c54c 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -700,6 +700,9 @@ int
 ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
 			    int wait_to_complete, int vf);
 
+#ifdef RTE_EXEC_ENV_FREEBSD
+int32_t ixgbe_wait_for_link_up(struct ixgbe_hw *hw);
+#endif
 /*
  * misc function prototypes
  */
-- 
2.17.1

Re: [dpdk-dev] [PATCH v2] net/ixgbe: fixed port can not link up in FreeBSD

[Ananyev, Konstantin]

Few small nits below.

s/fixed/fix/

> In FreeBSD environment, nic_uio drivers do not support interrupts,
> rte_intr_callback_register() will fail to register interrupts.
> We can not make link status to change from down to up by interrupt
> callback. So we need to wait for the controller to acquire link
> when ports start. Through multiple tests, 5s should be enough.

> 
> Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
> ---
> 
> v2 changes:
> * Put waiting into a separate function to keep start() code clean.
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 32 ++++++++++++++++++++++++++++++++
>  drivers/net/ixgbe/ixgbe_ethdev.h |  3 +++
>  2 files changed, 35 insertions(+)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
> index 2c6fd0f13..fba666186 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -2801,6 +2801,13 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
>  			    "please call hierarchy_commit() "
>  			    "before starting the port");
> 
> +#ifdef RTE_EXEC_ENV_FREEBSD
> +	/* wait for the controller to acquire link */
> +	err = ixgbe_wait_for_link_up(hw);
> +	if (err)
> +		goto error;
> +#endif

You can hide ifdef inside the function, see below.

> +
>  	/*
>  	 * Update link status right before return, because it may
>  	 * start link configuration process in a separate thread.
> @@ -4114,6 +4121,31 @@ ixgbe_dev_setup_link_alarm_handler(void *param)
>  	intr->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
>  }
> 
> +#ifdef RTE_EXEC_ENV_FREEBSD
> +/*
> + * In freebsd environment, nic_uio drivers do not support interrupts,
> + * rte_intr_callback_register() will fail to register interrupts.
> + * We can not make link status to change from down to up by interrupt
> + * callback. So we need to wait for the controller to acquire link
> + * when ports start.
> + * It returns 0 on link up.
> + */
> +int32_t ixgbe_wait_for_link_up(struct ixgbe_hw *hw)

This function can be static, plus pls try to follow dpdk codying style:

static int
ixgbe_wait_for_link_up(struct ixgbe_hw *hw)
{
   .... 

You can put #ifdef inside the function:
#ifdef RTE_EXEC_ENV_FREEBSD
<do something meaningfull here>
#else
RTE_SET_USED(hw);
#endif

Or even:
#ifdef RTE_EXEC_ENV_FREEBSD
const uint32_t nb_iter = 25;
#else
const uint32_t nb_iter = 0;
#endif

...
for (i = 0; i < nb_iter; i++) { 
   ...

> +{
> +	int err, i, link_up = 0;
> +	uint32_t speed = 0;

Empty line here would help readability.

> +	for (i = 0; i < 25; i++) {
> +		err = ixgbe_check_link(hw, &speed, &link_up, 0);
> +		if (err)
> +			return err;
> +		if (link_up)
> +			return 0;
> +		msec_delay(200);
> +	}
> +	return 0;
> +}
> +#endif
> +
>  /* return 0 means link status changed, -1 means not changed */
>  int
>  ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
> index 76a1b9d18..9a1d8c54c 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.h
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.h
> @@ -700,6 +700,9 @@ int
>  ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
>  			    int wait_to_complete, int vf);
> 
> +#ifdef RTE_EXEC_ENV_FREEBSD
> +int32_t ixgbe_wait_for_link_up(struct ixgbe_hw *hw);
> +#endif

Pls see above, that function can be static.

>  /*
>   * misc function prototypes
>   */
> --
> 2.17.1

[dpdk-dev] [PATCH v3] net/ixgbe: fix port can not link up in FreeBSD

[Lunyuan Cui]

In FreeBSD environment, nic_uio drivers do not support interrupts,
rte_intr_callback_register() will fail to register interrupts.
We can not make link status to change from down to up by interrupt
callback. So we need to wait for the controller to acquire link
when ports start. Through multiple tests, 5s should be enough.

Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
Cc: stable@dpdk.org

Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
---

v3 changes:
* Hide ifdef inside the function

v2 changes:
* Put waiting into a separate function to keep start() code clean.
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 36 ++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 2c6fd0f13..d9b0c5b02 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -378,6 +378,7 @@ static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
 					 struct rte_eth_udp_tunnel *udp_tunnel);
 static int ixgbe_filter_restore(struct rte_eth_dev *dev);
 static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
+static int ixgbe_wait_for_link_up(struct ixgbe_hw *hw);
 
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
@@ -2801,6 +2802,11 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 			    "please call hierarchy_commit() "
 			    "before starting the port");
 
+	/* wait for the controller to acquire link */
+	err = ixgbe_wait_for_link_up(hw);
+	if (err)
+		goto error;
+
 	/*
 	 * Update link status right before return, because it may
 	 * start link configuration process in a separate thread.
@@ -4114,6 +4120,36 @@ ixgbe_dev_setup_link_alarm_handler(void *param)
 	intr->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
 }
 
+/*
+ * In freebsd environment, nic_uio drivers do not support interrupts,
+ * rte_intr_callback_register() will fail to register interrupts.
+ * We can not make link status to change from down to up by interrupt
+ * callback. So we need to wait for the controller to acquire link
+ * when ports start.
+ * It returns 0 on link up.
+ */
+static int
+ixgbe_wait_for_link_up(struct ixgbe_hw *hw)
+{
+#ifdef RTE_EXEC_ENV_FREEBSD
+	const int nb_iter = 25;
+#else
+	const int nb_iter = 0;
+#endif
+	int err, i, link_up = 0;
+	uint32_t speed = 0;
+
+	for (i = 0; i < nb_iter; i++) {
+		err = ixgbe_check_link(hw, &speed, &link_up, 0);
+		if (err)
+			return err;
+		if (link_up)
+			return 0;
+		msec_delay(200);
+	}
+	return 0;
+}
+
 /* return 0 means link status changed, -1 means not changed */
 int
 ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
-- 
2.17.1

Re: [dpdk-dev] [PATCH v3] net/ixgbe: fix port can not link up in FreeBSD

[Ye Xiaolong]

On 12/16, Lunyuan Cui wrote:
>In FreeBSD environment, nic_uio drivers do not support interrupts,
>rte_intr_callback_register() will fail to register interrupts.
>We can not make link status to change from down to up by interrupt
>callback. So we need to wait for the controller to acquire link
>when ports start. Through multiple tests, 5s should be enough.
>
>Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
>Cc: stable@dpdk.org
>
>Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
>---
>
>v3 changes:
>* Hide ifdef inside the function
>
>v2 changes:
>* Put waiting into a separate function to keep start() code clean.
>---
> drivers/net/ixgbe/ixgbe_ethdev.c | 36 ++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
>diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
>index 2c6fd0f13..d9b0c5b02 100644
>--- a/drivers/net/ixgbe/ixgbe_ethdev.c
>+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
>@@ -378,6 +378,7 @@ static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
> 					 struct rte_eth_udp_tunnel *udp_tunnel);
> static int ixgbe_filter_restore(struct rte_eth_dev *dev);
> static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
>+static int ixgbe_wait_for_link_up(struct ixgbe_hw *hw);
> 
> /*
>  * Define VF Stats MACRO for Non "cleared on read" register
>@@ -2801,6 +2802,11 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
> 			    "please call hierarchy_commit() "
> 			    "before starting the port");
> 
>+	/* wait for the controller to acquire link */
>+	err = ixgbe_wait_for_link_up(hw);
>+	if (err)
>+		goto error;
>+
> 	/*
> 	 * Update link status right before return, because it may
> 	 * start link configuration process in a separate thread.
>@@ -4114,6 +4120,36 @@ ixgbe_dev_setup_link_alarm_handler(void *param)
> 	intr->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
> }
> 
>+/*
>+ * In freebsd environment, nic_uio drivers do not support interrupts,
>+ * rte_intr_callback_register() will fail to register interrupts.
>+ * We can not make link status to change from down to up by interrupt
>+ * callback. So we need to wait for the controller to acquire link
>+ * when ports start.
>+ * It returns 0 on link up.
>+ */
>+static int
>+ixgbe_wait_for_link_up(struct ixgbe_hw *hw)
>+{
>+#ifdef RTE_EXEC_ENV_FREEBSD
>+	const int nb_iter = 25;
>+#else
>+	const int nb_iter = 0;
>+#endif
>+	int err, i, link_up = 0;
>+	uint32_t speed = 0;
>+
>+	for (i = 0; i < nb_iter; i++) {
>+		err = ixgbe_check_link(hw, &speed, &link_up, 0);
>+		if (err)
>+			return err;
>+		if (link_up)
>+			return 0;
>+		msec_delay(200);
>+	}
>+	return 0;
>+}
>+
> /* return 0 means link status changed, -1 means not changed */
> int
> ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
>-- 
>2.17.1
>

Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>

Applied to dpdk-next-net-intel, Thanks.

Re: [dpdk-dev] [PATCH v3] net/ixgbe: fix port can not link up in FreeBSD

[Ananyev, Konstantin]

> In FreeBSD environment, nic_uio drivers do not support interrupts,
> rte_intr_callback_register() will fail to register interrupts.
> We can not make link status to change from down to up by interrupt
> callback. So we need to wait for the controller to acquire link
> when ports start. Through multiple tests, 5s should be enough.
> 
> Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
> ---
> 
> v3 changes:
> * Hide ifdef inside the function
> 
> v2 changes:
> * Put waiting into a separate function to keep start() code clean.
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 36 ++++++++++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
> index 2c6fd0f13..d9b0c5b02 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -378,6 +378,7 @@ static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
>  					 struct rte_eth_udp_tunnel *udp_tunnel);
>  static int ixgbe_filter_restore(struct rte_eth_dev *dev);
>  static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
> +static int ixgbe_wait_for_link_up(struct ixgbe_hw *hw);
> 
>  /*
>   * Define VF Stats MACRO for Non "cleared on read" register
> @@ -2801,6 +2802,11 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
>  			    "please call hierarchy_commit() "
>  			    "before starting the port");
> 
> +	/* wait for the controller to acquire link */
> +	err = ixgbe_wait_for_link_up(hw);
> +	if (err)
> +		goto error;
> +
>  	/*
>  	 * Update link status right before return, because it may
>  	 * start link configuration process in a separate thread.
> @@ -4114,6 +4120,36 @@ ixgbe_dev_setup_link_alarm_handler(void *param)
>  	intr->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
>  }
> 
> +/*
> + * In freebsd environment, nic_uio drivers do not support interrupts,
> + * rte_intr_callback_register() will fail to register interrupts.
> + * We can not make link status to change from down to up by interrupt
> + * callback. So we need to wait for the controller to acquire link
> + * when ports start.
> + * It returns 0 on link up.
> + */
> +static int
> +ixgbe_wait_for_link_up(struct ixgbe_hw *hw)
> +{
> +#ifdef RTE_EXEC_ENV_FREEBSD
> +	const int nb_iter = 25;
> +#else
> +	const int nb_iter = 0;
> +#endif
> +	int err, i, link_up = 0;
> +	uint32_t speed = 0;
> +
> +	for (i = 0; i < nb_iter; i++) {
> +		err = ixgbe_check_link(hw, &speed, &link_up, 0);
> +		if (err)
> +			return err;
> +		if (link_up)
> +			return 0;
> +		msec_delay(200);
> +	}
> +	return 0;
> +}
> +
>  /* return 0 means link status changed, -1 means not changed */
>  int
>  ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.17.1

[dpdk-dev] [PATCH] net/ixgbe: fixed port can not link up in FreeBSD

[Lunyuan Cui]

In FreeBSD environment, nic_uio drivers do not support interrupts,
rte_intr_callback_register() will fail to register interrupts.
We can not make link status to change from
down to up by interrupt callback.
So we need to wait for the controller to
acquire link when ports start.
Through multiple tests, 5s should be enough.

Fixes: b9bd0f09fa15 ("ethdev: fix link status query")
Cc: stable@dpdk.org

Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 2c6fd0f13..3023ee052 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2555,6 +2555,9 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 		IXGBE_DEV_PRIVATE_TO_TM_CONF(dev->data->dev_private);
 	struct ixgbe_macsec_setting *macsec_setting =
 		IXGBE_DEV_PRIVATE_TO_MACSEC_SETTING(dev->data->dev_private);
+#ifdef RTE_EXEC_ENV_FREEBSD
+	int i;
+#endif
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -2801,6 +2804,27 @@ ixgbe_dev_start(struct rte_eth_dev *dev)
 			    "please call hierarchy_commit() "
 			    "before starting the port");
 
+	/*
+	 * In freebsd environment, nic_uio drivers do not support interrupts,
+	 * rte_intr_callback_register() will fail to register interrupts.
+	 * We can not make link status to change
+	 * from down to up by interrupt callback.
+	 * So we need to wait for the controller
+	 * to acquire link when ports start.
+	 */
+#ifdef RTE_EXEC_ENV_FREEBSD
+	for (i = 0; i < 25; i++) {
+		/* If we have link, just jump out */
+		err = ixgbe_check_link(hw, &speed, &link_up, 0);
+		if (err)
+			goto error;
+		if (link_up)
+			break;
+		/* Wait for the link partner to also set speed */
+		msec_delay(200);
+	}
+#endif
+
 	/*
 	 * Update link status right before return, because it may
 	 * start link configuration process in a separate thread.
-- 
2.17.1