Re: [PATCH net-next 3/4] net/mlx5: Expose crr in health buffer

[Tariq Toukan <ttoukan.linux@xxxxxxxxx>]

On 27/02/2025 7:56, Michal Swiatkowski wrote:
> On Wed, Feb 26, 2025 at 02:25:42PM +0200, Tariq Toukan wrote:
> > From: Shahar Shitrit <shshitrit@xxxxxxxxxx>
> >
> > Expose crr bit in struct health buffer. When set, it indicates that
> > the error cannot be recovered without flow involving a cold reset.
> > Add its value to the health buffer info log.
> >
> > Signed-off-by: Shahar Shitrit <shshitrit@xxxxxxxxxx>
> > Reviewed-by: Moshe Shemesh <moshe@xxxxxxxxxx>
> > Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>
> > ---
> >   drivers/net/ethernet/mellanox/mlx5/core/health.c | 8 ++++++++
> >   1 file changed, 8 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/health.c b/drivers/net/ethernet/mellanox/mlx5/core/health.c
> > index 665cbce89175..c7ff646e0865 100644
> > --- a/drivers/net/ethernet/mellanox/mlx5/core/health.c
> > +++ b/drivers/net/ethernet/mellanox/mlx5/core/health.c
> > @@ -96,6 +96,11 @@ static int mlx5_health_get_rfr(u8 rfr_severity)
> >   	return rfr_severity >> MLX5_RFR_BIT_OFFSET;
> >   }
> >   
> > +static int mlx5_health_get_crr(u8 rfr_severity)
> > +{
> > +	return (rfr_severity >> MLX5_CRR_BIT_OFFSET) & 0x01;
> > +}
> > +
> >   static bool sensor_fw_synd_rfr(struct mlx5_core_dev *dev)
> >   {
> >   	struct mlx5_core_health *health = &dev->priv.health;
> > @@ -442,12 +447,15 @@ static void print_health_info(struct mlx5_core_dev *dev)
> >   	mlx5_log(dev, severity, "time %u\n", ioread32be(&h->time));
> >   	mlx5_log(dev, severity, "hw_id 0x%08x\n", ioread32be(&h->hw_id));
> >   	mlx5_log(dev, severity, "rfr %d\n", mlx5_health_get_rfr(rfr_severity));
> > +	mlx5_log(dev, severity, "crr %d\n", mlx5_health_get_crr(rfr_severity));
> >   	mlx5_log(dev, severity, "severity %d (%s)\n", severity, mlx5_loglevel_str(severity));
> >   	mlx5_log(dev, severity, "irisc_index %d\n", ioread8(&h->irisc_index));
> >   	mlx5_log(dev, severity, "synd 0x%x: %s\n", ioread8(&h->synd),
> >   		 hsynd_str(ioread8(&h->synd)));
> >   	mlx5_log(dev, severity, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd));
> >   	mlx5_log(dev, severity, "raw fw_ver 0x%08x\n", ioread32be(&h->fw_ver));
> > +	if (mlx5_health_get_crr(rfr_severity))
> > +		mlx5_core_warn(dev, "Cold reset is required\n");
> I wonder if it shouldn't be right after the print about crr value to
> tell the user that cold reset is required because of that value.

I think it's fine here, to not interfere the mlx5_log sequence.
Also, in the future we might have multiple cold reset reasons, 
generating the same single print.

I'll keep it as-is.

> Patch looks fine, thanks.
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>

Thanks for your review.