XL710 40GbE

[roedie]

Do you think it is possible to unlock an XL710 40GbE with this?

I have been looking around a bit and think I've found the offsets, but it looks quite different.

root@bootstrap:~# ./mytool 0x67fa 0xc
000067fa + 00 => 000b
000067fa + 01 => 0023
000067fa + 02 => 0600
000067fa + 03 => 0700
000067fa + 04 => 0000
000067fa + 05 => 0000
000067fa + 06 => 0e0d
000067fa + 07 => 0000
000067fa + 08 => 0b10
000067fa + 09 => 0000
000067fa + 0a => 0a1e
000067fa + 0b => 0002
root@bootstrap:~# ./mytool 0x6806 0xc
00006806 + 00 => 000b
00006806 + 01 => 0023
00006806 + 02 => 0600
00006806 + 03 => 0700
00006806 + 04 => 0000
00006806 + 05 => 0000
00006806 + 06 => 0e0d
00006806 + 07 => 0000
00006806 + 08 => 0b10
00006806 + 09 => 0000
00006806 + 0a => 0a1e
00006806 + 0b => 0102
root@bootstrap:~# ./mytool 0x6812 0xc
00006812 + 00 => 000b
00006812 + 01 => 0023
00006812 + 02 => 0600
00006812 + 03 => 0700
00006812 + 04 => 0000
00006812 + 05 => 0000
00006812 + 06 => 0e0d
00006812 + 07 => 0000
00006812 + 08 => 0b10
00006812 + 09 => 0000
00006812 + 0a => 0a1e
00006812 + 0b => 0202
root@bootstrap:~# ./mytool 0x681e 0xc
0000681e + 00 => 000b
0000681e + 01 => 0023
0000681e + 02 => 0600
0000681e + 03 => 0700
0000681e + 04 => 0000
0000681e + 05 => 0000
0000681e + 06 => 0e0d
0000681e + 07 => 0000
0000681e + 08 => 0b10
0000681e + 09 => 0000
0000681e + 0a => 0a1e
0000681e + 0b => 0302

[Yaugen-D]

It's completely possible to unlock an XL710 to work with unqualified 40GbE QSFP+ modules. I've tested my XL710-QDA2 NIC with HPE X140 40Gb BiDi QSFP+ module and this combination works fine (however intel datasheet for the card says BiDi optical modules are unsupported).

For unlocking XL710-based NIC you only need to set 11th bit in 0x0008 offset to 0. So for my NIC PHY Capability data structure 0 looks like:
000067fa 00 0x000b
000067fa 01 0x0023
000067fa 02 0x0600
000067fa 03 0x0700
000067fa 04 0x0000
000067fa 05 0x0000
000067fa 06 0x0e0d
000067fa 07 0x0000
000067fa 08 0x0310 <- this data was modified
000067fa 09 0x0000
000067fa 0a 0x0a1e
000067fa 0b 0x0002

You can easily find more information about data structures of XL710 in Intel datasheet:
http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xl710-10-40-controller-datasheet.pdf

[paunadeu]

I don't understand it :(

Output of:
./mytool 0 0x8000

http://paste.ubuntu.com/p/MWnB6fshNr/

How can find phy0_offset?