58f9416d41
Tony Nguyen says:
====================
ice: Support to dump PHY config, FEC
Anil Samal says:
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: https://lore.kernel.org/netdev/20240702180710.2606969-1-anthony.l.nguyen@intel.com/
====================
Link: https://patch.msgid.link/20240709202951.2103115-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Linux kernel
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