netdev - Re: [PATCH iwl-net] ice: implement AQ download pkg retry

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Date: Fri, 17 May 2024 09:49:04 +0200
From: Wojciech Drewek <wojciech.drewek@...el.com>
To: Brett Creeley <bcreeley@....com>, <netdev@...r.kernel.org>
CC: <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [PATCH iwl-net] ice: implement AQ download pkg retry



On 16.05.2024 18:36, Brett Creeley wrote:
> 
> 
> On 5/16/2024 7:04 AM, Wojciech Drewek wrote:
>> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
>>
>>
>> ice_aqc_opc_download_pkg (0x0C40) AQ sporadically returns error due
>> to FW issue. Fix this by retrying five times before moving to
>> Safe Mode.
>>
>> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
>> Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
>> ---
>>   drivers/net/ethernet/intel/ice/ice_ddp.c | 19 +++++++++++++++++--
>>   1 file changed, 17 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/intel/ice/ice_ddp.c b/drivers/net/ethernet/intel/ice/ice_ddp.c
>> index ce5034ed2b24..19e2111fcf08 100644
>> --- a/drivers/net/ethernet/intel/ice/ice_ddp.c
>> +++ b/drivers/net/ethernet/intel/ice/ice_ddp.c
>> @@ -1339,6 +1339,7 @@ ice_dwnld_cfg_bufs_no_lock(struct ice_hw *hw, struct ice_buf *bufs, u32 start,
>>
>>          for (i = 0; i < count; i++) {
>>                  bool last = false;
>> +               int try_cnt = 0;
>>                  int status;
>>
>>                  bh = (struct ice_buf_hdr *)(bufs + start + i);
>> @@ -1346,8 +1347,22 @@ ice_dwnld_cfg_bufs_no_lock(struct ice_hw *hw, struct ice_buf *bufs, u32 start,
>>                  if (indicate_last)
>>                          last = ice_is_last_download_buffer(bh, i, count);
>>
>> -               status = ice_aq_download_pkg(hw, bh, ICE_PKG_BUF_SIZE, last,
>> -                                            &offset, &info, NULL);
>> +               while (try_cnt < 5) {
>> +                       status = ice_aq_download_pkg(hw, bh, ICE_PKG_BUF_SIZE,
>> +                                                    last, &offset, &info,
>> +                                                    NULL);
>> +                       if (hw->adminq.sq_last_status != ICE_AQ_RC_ENOSEC &&
>> +                           hw->adminq.sq_last_status != ICE_AQ_RC_EBADSIG)
> 
> Are these the only 2 sporadic errors that FW will return?

Yes, that's right. We don't want to retry in case of other errors since those might be valid.

> 
>> +                               break;
>> +
>> +                       try_cnt++;
>> +                       msleep(20);
>> +               }
>> +
>> +               if (try_cnt)
>> +                       dev_dbg(ice_hw_to_dev(hw),
>> +                               "ice_aq_download_pkg failed, number of retries: %d\n",
>> +                               try_cnt);
> 
> If try_cnt is non-zero it doesn't mean the last download failed, it just means one or more attempts to download failed right? Maybe just "ice_aq_download_pkg number of retries: %d" since the if (status) check below will print on failure?

Sounds reasonable, we want this log only because we want to know if we hit this sporadic failure.

> 
>>
>>                  /* Save AQ status from download package */
>>                  if (status) {
>> -- 
>> 2.40.1
>>
>>