Feature #13406
nexus drivers evade topo nic logic
Start date:
Due date:
% Done:
100%
Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:
Description
NIC drivers vary in how they represent multiple-ports that are attached to the same physical PCI device. Many devices use a single PCI function per-port (regardless of whether they have shared resources or not) and therefore a single driver instance per function. Other drivers, like cxgbe, use a nexus driver to represent the device as a whole (t4nex in this case) and then enumerate a child device per-port that attaches to mac.
Right now the topo nic logic introduced in #8699 and #12206 assumes the per-function logic. We should add some additional logic in topo that can handle this and creates the same underlying abstraction in topo.
For example, this is what we now see for an instance of a Chelsio T6:
hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4
group: protocol version: 1 stability: Private/Private
resource fmri hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4
label string MB
FRU fmri hc://:server-id=beowulf/motherboard=0
ASRU fmri dev:////pci@78,0/pci1022,1483@3,1/pci1425,0@0,4
group: authority version: 1 stability: Private/Private
server-id string beowulf
group: io version: 1 stability: Private/Private
dev string /pci@78,0/pci1022,1483@3,1/pci1425,0@0,4
driver string t4nex
instance uint32 0x0
module fmri mod:///mod-name=t4nex/mod-id=194
group: pci version: 1 stability: Private/Private
device-id string 6408
extended-capabilities string pciexdev
class-code string 20000
vendor-id string 1425
assigned-addresses uint32[] [ 2206270480 0 4080009216 0 524288 2206270488 0 4060086272 0 16777216 2206270496 0 4086841344 0 8192 ]
vendor-name string Chelsio Communications Inc
device-name string T62100-SO-CR Unified Wire Ethernet Controller
hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=0
group: protocol version: 1 stability: Private/Private
resource fmri hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=0
FRU fmri hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4
group: authority version: 1 stability: Private/Private
server-id string beowulf
group: port version: 1 stability: Private/Private
type string sff
group: datalink version: 1 stability: Private/Private
link-speed uint64 0x174876e800
link-duplex string full
link-status string up
link-name string cxgbe0
primary-mac-address string 00:07:43:5d:4d:60
hc://:server-id=beowulf:serial=F1940192980-2:part=Q28-PC01:revision=A/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=0/transceiver=0
group: protocol version: 1 stability: Private/Private
resource fmri hc://:server-id=beowulf:serial=F1940192980-2:part=Q28-PC01:revision=A/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=0/transceiver=0
FRU fmri hc://:server-id=beowulf:serial=F1940192980-2:part=Q28-PC01:revision=A/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=0/transceiver=0
group: authority version: 1 stability: Private/Private
server-id string beowulf
group: transceiver version: 1 stability: Private/Private
type string sff
usable string true
group: sff-transceiver version: 1 stability: Private/Private
vendor string FS
part-number string Q28-PC01
revision string A
serial-number string F1940192980-2
hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=1
group: protocol version: 1 stability: Private/Private
resource fmri hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=1
FRU fmri hc://:server-id=beowulf/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4
group: authority version: 1 stability: Private/Private
server-id string beowulf
group: port version: 1 stability: Private/Private
type string sff
group: datalink version: 1 stability: Private/Private
link-speed uint64 0x174876e800
link-duplex string full
link-status string up
link-name string cxgbe1
primary-mac-address string 00:07:43:5d:4d:68
hc://:server-id=beowulf:serial=F1940192980-1:part=Q28-PC01:revision=A/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=1/transceiver=0
group: protocol version: 1 stability: Private/Private
resource fmri hc://:server-id=beowulf:serial=F1940192980-1:part=Q28-PC01:revision=A/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=1/transceiver=0
FRU fmri hc://:server-id=beowulf:serial=F1940192980-1:part=Q28-PC01:revision=A/motherboard=0/hostbridge=8/pciexrc=8/pciexbus=129/pciexdev=0/pciexfn=4/port=1/transceiver=0
group: authority version: 1 stability: Private/Private
server-id string beowulf
group: transceiver version: 1 stability: Private/Private
type string sff
usable string true
group: sff-transceiver version: 1 stability: Private/Private
vendor string FS
part-number string Q28-PC01
revision string A
serial-number string F1940192980-1
Note that the reason that the transceiver has the same information in both cases is because I had a cable looping back upon itself.
Updated by Electric Monk 2 months ago
- Status changed from New to Closed
- % Done changed from 0 to 100
git commit 1502345d2f71778fdc0a78f6530cd512c93223d3
commit 1502345d2f71778fdc0a78f6530cd512c93223d3
Author: Robert Mustacchi <rm@fingolfin.org>
Date: 2021-02-13T15:06:20.000Z
13406 nexus drivers evade topo nic logic
Reviewed by: Patrick Mooney <pmooney@pfmooney.com>
Reviewed by: Ryan Zezeski <ryan@oxide.computer>
Approved by: Richard Lowe <richlowe@richlowe.net>