netdev - Re: [patch net-next v6 4/4] igb/igbvf: implement ndo_get_phys_port

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Date:	Thu, 22 Aug 2013 15:10:19 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:	aaron.f.brown@...el.com, netdev@...r.kernel.org,
	davem@...emloft.net, stephen@...workplumber.org,
	Narendra_K@...l.com, bhutchings@...arflare.com,
	or.gerlitz@...il.com, carolyn.wyborny@...el.com,
	gregory.v.rose@...el.com, vyasevic@...hat.com, amwang@...hat.com,
	johannes@...solutions.net
Subject: Re: [patch net-next v6 4/4] igb/igbvf: implement ndo_get_phys_port_id

Thu, Aug 22, 2013 at 12:39:10PM CEST, jeffrey.t.kirsher@...el.com wrote:
>On Mon, 2013-07-29 at 18:16 +0200, Jiri Pirko wrote:
>> igb driver generated random number which will identify physical port.
>> This id is available via ndo_get_phys_port_id directly on igb netdev.
>> Also, id is passed to igbvf using mailbox. After that, it is available
>> via
>> ndo_get_phys_port_id on igbvf netdev as well.
>> 
>> Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>> ---
>>  drivers/net/ethernet/intel/igb/e1000_mbx.h |  1 +
>>  drivers/net/ethernet/intel/igb/igb.h       |  3 +++
>>  drivers/net/ethernet/intel/igb/igb_main.c  | 37
>> ++++++++++++++++++++++++++++-
>>  drivers/net/ethernet/intel/igbvf/igbvf.h   |  4 ++++
>>  drivers/net/ethernet/intel/igbvf/mbx.h     |  1 +
>>  drivers/net/ethernet/intel/igbvf/netdev.c  | 38
>> ++++++++++++++++++++++++++++++
>>  drivers/net/ethernet/intel/igbvf/vf.c      | 34
>> ++++++++++++++++++++++++++
>>  drivers/net/ethernet/intel/igbvf/vf.h      |  1 +
>>  8 files changed, 118 insertions(+), 1 deletion(-)
>
>Jiri-
>
>Validation ran into a couple of issues with this patch.  Here is what
>Aaron found when testing this patch...

Interesting. So since igbvf_refresh_ppid() is called from igbvf_reset()
and igbvf_probe(), I believed that is enough. Looks like perm_addr
getting works in similar way. Can you please check if perm_addr is set
correctly in the same time reading phys_port_id gives -EOPNOTSUPP?


>
>Aaron Brown wrote:
>I think I have to fail this, it seems to have an issue with
>initialization.  When I first create a vf via sysfs the pys_port_id file
>is created along with the other sysfs files for the vf, however an
>attempt to cat out the value returns " Operation not supported".  At
>this point the vf is still down, if I bring it up (or simply unload /
>reload the igbvf driver) I can then cat the file successfully and the vf
>interface phys_port_id matches the phys_port_id of the pf.  This is
>testing from bare metal, a console session showing this behavior
>follows:
>
>u1304:[0]/sys> find . -iname phys_port_id
>./devices/pci0000:00/0000:00:01.0/0000:07:00.0/net/eth0/phys_port_id
>./devices/pci0000:00/0000:00:01.0/0000:07:00.1/net/eth1/phys_port_id
>./devices/virtual/net/sit0/phys_port_id
>./devices/virtual/net/lo/phys_port_id
>u1304:[0]/sys> cat devices/pci0000:00/0000:00:01.0/0000:07:00.0/net/eth0/phys_port_id
>5ece9fbd9cd51546982e15c1f2c11e25
>u1304:[0]/sys>
>
>So far so good, now make a few vfs and check for new phys_port_id sysfs files.
>
>u1304:[0]/sys> find . -iname sriov_numvfs
>./devices/pci0000:00/0000:00:01.0/0000:07:00.0/sriov_numvfs
>./devices/pci0000:00/0000:00:01.0/0000:07:00.1/sriov_numvfs
>u1304:[0]/sys> echo 2 > devices/pci0000:00/0000:00:01.0/0000:07:00.0/sriov_numvfs
>u1304:[0]/sys> find . -iname phys_port_id                                       ./devices/pci0000:00/0000:00:01.0/0000:07:00.0/net/eth0/phys_port_id
>./devices/pci0000:00/0000:00:01.0/0000:07:00.1/net/eth1/phys_port_id
>./devices/pci0000:00/0000:00:01.0/0000:07:10.0/net/eth2/phys_port_id
>./devices/pci0000:00/0000:00:01.0/0000:07:10.2/net/eth3/phys_port_id
>./devices/virtual/net/sit0/phys_port_id
>./devices/virtual/net/lo/phys_port_id
>u1304:[0]/sys>
>
>The first vf is eth2, attempt to cat out it's phys_port_id
>
>u1304:[0]/sys> cat ./devices/pci0000:00/0000:00:01.0/0000:07:10.0/net/eth2/phys_port_id
>cat: ./devices/pci0000:00/0000:00:01.0/0000:07:10.0/net/eth2/phys_port_id: Operation not supported
>u1304:[0]/sys>
>
>But, if I bring the interface up (or unload / load the igbvf driver) I then am able to cat the phys_port_id of the vf and it matches the phys_port_id of the physical interface.
>
>u1304:[0]/sys> ifconfig eth2 u1304-2
>u1304:[0]/sys> cat ./devices/pci0000:00/0000:00:01.0/0000:07:10.0/net/eth2/phys_port_id
>5ece9fbd9cd51546982e15c1f2c11e25
>u1304:[0]/sys>


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