netdev - [PATCH iwl-next v3 0/3] ice:Support to dump PHY config, FEC

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Date: Fri, 14 Jun 2024 05:58:14 -0700
From: Anil Samal <anil.samal@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	leszek.pepiak@...el.com,
	przemyslaw.kitszel@...el.com,
	lukasz.czapnik@...el.com,
	anthony.l.nguyen@...el.com,
	Anil Samal <anil.samal@...el.com>
Subject: [PATCH iwl-next v3 0/3] ice:Support to dump PHY config, FEC 

Implementation to dump PHY configuration and FEC statistics to
facilitate link level debugging of customer issues.  Implementation has
two parts 
  
a.     Serdes equalization
        # ethtool  -d eth0 
        Output: 
        Offset          Values
        ------          ------
        0x0000:         00 00 00 00 03 00 00 00 05 00 00 00 01 08 00 40
        0x0010:         01 00 00 40 00 00 39 3c 01 00 00 00 00 00 00 00
        0x0020:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        ……
        …..
        0x01f0:         01 00 00 00 ef be ad de 8f 00 00 00 00 00 00 00
        0x0200:         00 00 00 00 ef be ad de 00 00 00 00 00 00 00 00
        0x0210:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0220:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0230:         00 00 00 00 00 00 00 00 00 00 00 00 fa ff 00 00
        0x0240:         06 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00
        0x0250:         0f b0 0f b0 00 00 00 00 00 00 00 00 00 00 00 00
        0x0260:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0270:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0280:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0290:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x02a0:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x02b0:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x02c0:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x02d0:         00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x02e0:         00 00 00 00 00 00 00 00 00 00 00 00
Current implementation appends 176 bytes i.e. 44 bytes * 4 serdes lane.
For port with 2 serdes lane, first 88 bytes are valid values and
remaining 88 bytes are filled with zero. Similarly for port with 1
serdes lane, first 44 bytes are valid and remaining 132 bytes are marked
zero. 

Each set of serdes equalizer parameter (i.e. set of 44 bytes) follows
below order 
    a. rx_equalization_pre2
    b. rx_equalization_pre1
    c. rx_equalization_post1
    d. rx_equalization_bflf
    e. rx_equalization_bfhf
    f. rx_equalization_drate
    g. tx_equalization_pre1
    h. tx_equalization_pre3
    i. tx_equalization_atten
    j. tx_equalization_post1
    k. tx_equalization_pre2
Where each individual equalizer parameter is of 4 bytes. As ethtool
prints values as individual bytes, for little endian machine these
values will be in reverse byte order. 

b.	FEC block counts
        # ethtool  -I --show-fec eth0
        Output:
         FEC parameters for eth0:
        Supported/Configured FEC encodings: Auto RS BaseR
        Active FEC encoding: RS
        Statistics:
        corrected_blocks: 0
         uncorrectable_blocks: 0

This series do following:
Patch 1 – Implementation to support user provided flag for side band
queue command. 
Patch 2 – Currently driver does not have a way to derive serdes lane
number, pcs quad , pcs port from port number.So we introduced a
mechanism to derive above info. 
          Ethtool interface extension to include FEC statistics counter.
Patch 3 – Ethtool interface extension to include serdes equalizer
output.

v1 -> v2, 
   Squashed 4 commit to 3 commit. 
   Removed extra null check of arguments.
   Removed initialization of local variable that are not required.

v2 -> v3
   updated the argument for sideband queue function from "flag" to
"flags"

 .../net/ethernet/intel/ice/ice_adminq_cmd.h   |  51 ++
 drivers/net/ethernet/intel/ice/ice_common.c   |  99 +++-
 drivers/net/ethernet/intel/ice/ice_common.h   |  28 +-
 drivers/net/ethernet/intel/ice/ice_ethtool.c  | 449 +++++++++++++++++-
 drivers/net/ethernet/intel/ice/ice_ethtool.h  |  29 ++
 drivers/net/ethernet/intel/ice/ice_ptp_hw.c   |  20 +-
 drivers/net/ethernet/intel/ice/ice_type.h     |   8 +
 7 files changed, 669 insertions(+), 15 deletions(-)

-- 
2.44.0