netdev - Re: [PATCH net-next 3/5] ionic: new ionic device identity level and VF start control

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Date:   Tue, 25 Oct 2022 01:35:08 -0700
From:   Shannon Nelson <shnelson@....com>
To:     Leon Romanovsky <leon@...nel.org>,
        Shannon Nelson <snelson@...sando.io>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org,
        drivers@...sando.io
Subject: Re: [PATCH net-next 3/5] ionic: new ionic device identity level and
 VF start control



On 10/24/22 5:16 AM, Leon Romanovsky wrote:
> 
> On Mon, Oct 24, 2022 at 03:17:15AM -0700, Shannon Nelson wrote:
>> A new ionic dev_cmd is added to the interface in ionic_if.h,
>> with a new capabilities field in the ionic device identity to
>> signal its availability in the FW.  The identity level code is
>> incremented to '2' to show support for this new capabilities
>> bitfield.
>>
>> If the driver has indicated with the new identity level that
>> it has the VF_CTRL command, newer FW will wait for the start
>> command before starting the VFs after a FW update or crash
>> recovery.
>>
>> This patch updates the driver to make use of the new VF start
>> control in fw_up path to be sure that the PF has set the user
>> attributes on the VF before the FW allows the VFs to restart.
>>
>> Signed-off-by: Shannon Nelson <snelson@...sando.io>
>> ---
>>   .../net/ethernet/pensando/ionic/ionic_dev.c   | 20 +++++++++
>>   .../net/ethernet/pensando/ionic/ionic_dev.h   |  3 ++
>>   .../net/ethernet/pensando/ionic/ionic_if.h    | 41 +++++++++++++++++++
>>   .../net/ethernet/pensando/ionic/ionic_lif.c   |  2 +
>>   .../net/ethernet/pensando/ionic/ionic_main.c  |  2 +-
>>   5 files changed, 67 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
>> index 9d0514cfeb5c..20a0d87c9fce 100644
>> --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
>> +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
>> @@ -481,6 +481,26 @@ int ionic_dev_cmd_vf_getattr(struct ionic *ionic, int vf, u8 attr,
>>        return err;
>>   }
>>
>> +void ionic_vf_start(struct ionic *ionic, int vf)
>> +{
>> +     union ionic_dev_cmd cmd = {
>> +             .vf_ctrl.opcode = IONIC_CMD_VF_CTRL,
>> +     };
>> +
>> +     if (!(ionic->ident.dev.capabilities & cpu_to_le64(IONIC_DEV_CAP_VF_CTRL)))
>> +             return;
>> +
>> +     if (vf == -1) {
>> +             cmd.vf_ctrl.ctrl_opcode = IONIC_VF_CTRL_START_ALL;
>> +     } else {
>> +             cmd.vf_ctrl.ctrl_opcode = IONIC_VF_CTRL_START;
>> +             cmd.vf_ctrl.vf_index = cpu_to_le16(vf);
>> +     }
> 
> <...>
> 
>> +     ionic_vf_start(ionic, -1)
> 
> I see only call with "-1" in this series. It is better to add code when
> it is actually used.
> 
> Thanks

I'll clean that up - thanks.
sln