[dpdk-dev] [PATCH] net/mlx5/windows: fix link speed calculation

[dpdk-dev] [PATCH] net/mlx5/windows: fix link speed calculation

[Tal Shnaiderman]

In Windows DevX returns the value of the current link speed
in bps rate, the conversion to the Mbps rate expected by DPDK
is incorrect and fixed.

Fixes: 6fbd73709ee4be32 ("net/mlx5: support link update on Windows")
Cc: stable@dpdk.org

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
---
 drivers/net/mlx5/windows/mlx5_ethdev_os.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/windows/mlx5_ethdev_os.c b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
index 8609d38eca..c709dd19be 100644
--- a/drivers/net/mlx5/windows/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
@@ -254,7 +254,7 @@ mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 	}
 	priv = dev->data->dev_private;
 	context_obj = (mlx5_context_st *)priv->sh->ctx;
-	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1024 * 1024);
+	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1000 * 1000);
 	dev_link.link_status =
 	      (context_obj->mlx5_dev.link_state == 1 && !mlx5_is_removed(dev))
 	      ? 1 : 0;
-- 
2.16.1.windows.4

Re: [dpdk-dev] [PATCH] net/mlx5/windows: fix link speed calculation

[Thomas Monjalon]

There is no previous commit with net/mlx5/windows as title prefix.
In general, there is "on Windows" at the end of the title.
This way we can have the same formatting when fixing the common code
for a Windows case.

05/04/2021 18:18, Tal Shnaiderman:
> In Windows DevX returns the value of the current link speed
> in bps rate, the conversion to the Mbps rate expected by DPDK
> is incorrect and fixed.

"was" incorrect.

I think you should explain the confusion between Mbit/s and Mibit/s.

> -	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1024 * 1024);
> +	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1000 * 1000);

Re: [dpdk-dev] [PATCH] net/mlx5/windows: fix link speed calculation

[Tal Shnaiderman]

> Subject: Re: [PATCH] net/mlx5/windows: fix link speed calculation
> 
> External email: Use caution opening links or attachments
> 
> 
> There is no previous commit with net/mlx5/windows as title prefix.
> In general, there is "on Windows" at the end of the title.
> This way we can have the same formatting when fixing the common code for a
> Windows case.
> 
> 05/04/2021 18:18, Tal Shnaiderman:
> > In Windows DevX returns the value of the current link speed in bps
> > rate, the conversion to the Mbps rate expected by DPDK is incorrect
> > and fixed.
> 
> "was" incorrect.
> 
> I think you should explain the confusion between Mbit/s and Mibit/s.
> 
> > -     dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1024 * 1024);
> > +     dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1000 *
> > + 1000);
> 
> 

Thanks Thomas for the review, will address the comments in v2.

[dpdk-dev] [PATCH v2] net/mlx5: fix link speed calculation on Windows

[Tal Shnaiderman]

In Windows DevX returns the rate of the current link speed
in bit/s, this rate was converted to Mibit/s instead of the Mbit/s
rate expected by DPDK resulting in wrong link speed reporting.

Fixes: 6fbd73709ee4be32 ("net/mlx5: support link update on Windows")
Cc: stable@dpdk.org

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
---
v2: fix commit message [Thomas]
---
 drivers/net/mlx5/windows/mlx5_ethdev_os.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/windows/mlx5_ethdev_os.c b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
index 8609d38eca..c709dd19be 100644
--- a/drivers/net/mlx5/windows/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/windows/mlx5_ethdev_os.c
@@ -254,7 +254,7 @@ mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 	}
 	priv = dev->data->dev_private;
 	context_obj = (mlx5_context_st *)priv->sh->ctx;
-	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1024 * 1024);
+	dev_link.link_speed = context_obj->mlx5_dev.link_speed / (1000 * 1000);
 	dev_link.link_status =
 	      (context_obj->mlx5_dev.link_state == 1 && !mlx5_is_removed(dev))
 	      ? 1 : 0;
-- 
2.16.1.windows.4

Re: [dpdk-dev] [PATCH v2] net/mlx5: fix link speed calculation on Windows

[Matan Azrad]

From: Tal Shnaiderman

> In Windows DevX returns the rate of the current link speed in bit/s, this rate
> was converted to Mibit/s instead of the Mbit/s rate expected by DPDK resulting
> in wrong link speed reporting.
> 
> Fixes: 6fbd73709ee4be32 ("net/mlx5: support link update on Windows")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>

Re: [dpdk-dev] [PATCH v2] net/mlx5: fix link speed calculation on Windows

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: Tal Shnaiderman <talshn@nvidia.com>
> Sent: Tuesday, April 6, 2021 10:32 AM
> To: dev@dpdk.org
> Cc: NBU-Contact-Thomas Monjalon <thomas@monjalon.net>; Matan Azrad
> <matan@nvidia.com>; Raslan Darawsheh <rasland@nvidia.com>; Ophir
> Munk <ophirmu@nvidia.com>; stable@dpdk.org
> Subject: [PATCH v2] net/mlx5: fix link speed calculation on Windows
> 
> In Windows DevX returns the rate of the current link speed
> in bit/s, this rate was converted to Mibit/s instead of the Mbit/s
> rate expected by DPDK resulting in wrong link speed reporting.
> 
> Fixes: 6fbd73709ee4be32 ("net/mlx5: support link update on Windows")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
> ---
> v2: fix commit message [Thomas]
> ---

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh