[PATCH] net/mlx5: support no host PF configuration

[Dariusz Sosnowski]

> -----Original Message-----
> From: Bing Zhao <bingz at nvidia.com>
> Sent: Friday, September 27, 2024 09:12
> To: Jiawei(Jonny) Wang <jiaweiw at nvidia.com>; Suanming Mou
> <suanmingm at nvidia.com>; Xueming Li <xuemingl at nvidia.com>; Slava Ovsiienko
> <viacheslavo at nvidia.com>
> Cc: dev at dpdk.org; Raslan Darawsheh <rasland at nvidia.com>
> Subject: RE: [PATCH] net/mlx5: support no host PF configuration
> 
> External email: Use caution opening links or attachments
> 
> 
> Hi,
> 
> > -----Original Message-----
> > From: Jiawei Wang <jiaweiw at nvidia.com>
> > Sent: Wednesday, October 11, 2023 2:42 PM
> > To: Suanming Mou <suanmingm at nvidia.com>; Xueming(Steven) Li
> > <xuemingl at nvidia.com>; Slava Ovsiienko <viacheslavo at nvidia.com>
> > Cc: dev at dpdk.org; Raslan Darawsheh <rasland at nvidia.com>
> > Subject: [PATCH] net/mlx5: support no host PF configuration
> >
> > External email: Use caution opening links or attachments
> >
> >
> > From: Xueming Li <xuemingl at nvidia.com>
> >
> > In BlueField, a new firmware configuration option NUM_OF_PF=0 disables
> > PF on the x86 host side, no HPF on the ARM side, and the only RDMA
> > port on the ARM side is the bonding device(PF0). A device probe with
> > devargs of representor=pf[0-1]vf[...] will probe PF0 and PF1 one by
> > one, and it's possible that PF1 device scan results in no switch ports.
> >
> > This patch supports the new configuration by allowing a PF scan with
> > empty switch ports.
> >
> > Signed-off-by: Xueming Li <xuemingl at nvidia.com>
> > Signed-off-by: Jiawei Wang <jiaweiw at nvidia.com>
> > ---
> >  drivers/net/mlx5/linux/mlx5_os.c | 7 -------
> >  1 file changed, 7 deletions(-)
> >
> > diff --git a/drivers/net/mlx5/linux/mlx5_os.c
> > b/drivers/net/mlx5/linux/mlx5_os.c
> > index d5ef695e6d..75f53ade8e 100644
> > --- a/drivers/net/mlx5/linux/mlx5_os.c
> > +++ b/drivers/net/mlx5/linux/mlx5_os.c
> > @@ -2195,13 +2195,6 @@ mlx5_os_pci_probe_pf(struct
> mlx5_common_device
> > *cdev,
> >                                      list[ns].info.master))
> >                                 ns++;
> >                 }
> > -               if (!ns) {
> > -                       DRV_LOG(ERR,
> > -                               "Unable to recognize master/representors
> > on the IB device with multiple ports.");
> > -                       rte_errno = ENOENT;
> > -                       ret = -rte_errno;
> > -                       goto exit;
> > -               }
> >         } else {
> >                 /*
> >                  * The existence of several matching entries (nd > 1)
> > means
> > --
> 
> Acked-by: Bing Zhao <bingz at nvidia.com>
> 
> Thanks
> 

Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>

Best regards,
Dariusz Sosnowski