doc: add a co-existence consideration for qede PMD

  Add and update co-existence considerations for qede PMD

Signed-off-by: Rasesh Mody <rmody@marvell.com>
---
 doc/guides/nics/qede.rst | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)
  

31/07/2019 10:02, Rasesh Mody:
> Add and update co-existence considerations for qede PMD
> 
> Signed-off-by: Rasesh Mody <rmody@marvell.com>
> ---
>  doc/guides/nics/qede.rst | 21 +++++++++++++++++++--
>  1 file changed, 19 insertions(+), 2 deletions(-)
> 
> +- Linux kernel drivers and qede PMD can’t be mixed on a given FastLinQ
> +  QL4xxx adapter. This type of coexistence is unsupported. A given
> +  adapter needs to be completely used by DPDK or Linux drivers, when
> +  SR-IOV is not enabled. Before binging DPDK driver to one or more
> +  devices on the adapter, please make sure to unbind Linux drivers from
> +  all devices of the adapter. If there are multiple adapters on the
> +  system, one or more adapter can be used by DPDK driver and other
> +  adapters can be used by Linux drivers.
> +
> +- When SR-IOV is enabled, Linux native kernel driver (qede) can be bound
> +  to the PFs of a given adapter and either DPDK or Linux drivers can be
> +  bound to the VFs of the adapter.

This part is not specific to qede, but related to UIO/VFIO behaviour.
I think we already have this kind of explanation in the Linux guide.
If not, please update it and add a reference link from here.
Thanks
  

Hi Thomas,

>From: Thomas Monjalon <thomas@monjalon.net>
>Sent: Wednesday, July 31, 2019 1:31 AM
>
>31/07/2019 10:02, Rasesh Mody:
>> Add and update co-existence considerations for qede PMD
>>
>> Signed-off-by: Rasesh Mody <rmody@marvell.com>
>> ---
>>  doc/guides/nics/qede.rst | 21 +++++++++++++++++++--
>>  1 file changed, 19 insertions(+), 2 deletions(-)
>>
>> +- Linux kernel drivers and qede PMD can’t be mixed on a given FastLinQ
>> +  QL4xxx adapter. This type of coexistence is unsupported. A given
>> +  adapter needs to be completely used by DPDK or Linux drivers, when
>> +  SR-IOV is not enabled. Before binging DPDK driver to one or more
>> +  devices on the adapter, please make sure to unbind Linux drivers from
>> +  all devices of the adapter. If there are multiple adapters on the
>> +  system, one or more adapter can be used by DPDK driver and other
>> +  adapters can be used by Linux drivers.
>> +
>> +- When SR-IOV is enabled, Linux native kernel driver (qede) can be bound
>> +  to the PFs of a given adapter and either DPDK or Linux drivers can be
>> +  bound to the VFs of the adapter.
>
>This part is not specific to qede, but related to UIO/VFIO behaviour.
>I think we already have this kind of explanation in the Linux guide.
>If not, please update it and add a reference link from here.

I've sent updated v2 version of co-existence consideration for Qlogic adapters. These considerations are specific to qede PMD. Usage of DPDK and QLogic Linux drivers across multiple PFs on the same adapter is not possible and unique for our architecture. We do not want to add notes regarding UIO/VFIO behavior here as its common to others as well.

Thanks!
-Rasesh
 
>Thanks
>
  

05/08/2019 11:26, Rasesh Mody:
> Hi Thomas,
> 
> >From: Thomas Monjalon <thomas@monjalon.net>
> >Sent: Wednesday, July 31, 2019 1:31 AM
> >
> >31/07/2019 10:02, Rasesh Mody:
> >> Add and update co-existence considerations for qede PMD
> >>
> >> Signed-off-by: Rasesh Mody <rmody@marvell.com>
> >> ---
> >>  doc/guides/nics/qede.rst | 21 +++++++++++++++++++--
> >>  1 file changed, 19 insertions(+), 2 deletions(-)
> >>
> >> +- Linux kernel drivers and qede PMD can’t be mixed on a given FastLinQ
> >> +  QL4xxx adapter. This type of coexistence is unsupported. A given
> >> +  adapter needs to be completely used by DPDK or Linux drivers, when
> >> +  SR-IOV is not enabled. Before binging DPDK driver to one or more
> >> +  devices on the adapter, please make sure to unbind Linux drivers from
> >> +  all devices of the adapter. If there are multiple adapters on the
> >> +  system, one or more adapter can be used by DPDK driver and other
> >> +  adapters can be used by Linux drivers.
> >> +
> >> +- When SR-IOV is enabled, Linux native kernel driver (qede) can be bound
> >> +  to the PFs of a given adapter and either DPDK or Linux drivers can be
> >> +  bound to the VFs of the adapter.
> >
> >This part is not specific to qede, but related to UIO/VFIO behaviour.
> >I think we already have this kind of explanation in the Linux guide.
> >If not, please update it and add a reference link from here.
> 
> I've sent updated v2 version of co-existence consideration for Qlogic adapters. These considerations are specific to qede PMD. Usage of DPDK and QLogic Linux drivers across multiple PFs on the same adapter is not possible and unique for our architecture. We do not want to add notes regarding UIO/VFIO behavior here as its common to others as well.

OK, looks good.