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Message-ID: <4d86acf1-d449-92d7-f8c7-bd0edc9e5107@gmail.com> Date: Mon, 18 Apr 2022 08:31:30 -0600 From: David Ahern <dsahern@...il.com> To: Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, jiri@...dia.com, vadimp@...dia.com, petrm@...dia.com, andrew@...n.ch, mlxsw@...dia.com Subject: Re: [PATCH net-next 00/17] Introduce line card support for modular switch On 4/18/22 12:42 AM, Ido Schimmel wrote: > Jiri says: > > This patchset introduces support for modular switch systems and also > introduces mlxsw support for NVIDIA Mellanox SN4800 modular switch. > It contains 8 slots to accommodate line cards - replaceable PHY modules > which may contain gearboxes. > Currently supported line card: > 16X 100GbE (QSFP28) > Other line cards that are going to be supported: > 8X 200GbE (QSFP56) > 4X 400GbE (QSFP-DD) > There may be other types of line cards added in the future. > > To be consistent with the port split configuration (splitter cabels), > the line card entities are treated in the similar way. The nature of > a line card is not "a pluggable device", but "a pluggable PHY module". > > A concept of "provisioning" is introduced. The user may "provision" > certain slot with a line card type. Driver then creates all instances > (devlink ports, netdevices, etc) related to this line card type. It does > not matter if the line card is plugged-in at the time. User is able to > configure netdevices, devlink ports, setup port splitters, etc. From the > perspective of the switch ASIC, all is present and can be configured. > > The carrier of netdevices stays down if the line card is not plugged-in. > Once the line card is inserted and activated, the carrier of > the related netdevices is then reflecting the physical line state, > same as for an ordinary fixed port. > > Once user does not want to use the line card related instances > anymore, he can "unprovision" the slot. Driver then removes the > instances. > > Patches 1-4 are extending devlink driver API and UAPI in order to > register, show, dump, provision and activate the line card. > Patches 5-17 are implementing the introduced API in mlxsw. > The last patch adds a selftest for mlxsw line cards. > > Example: > $ devlink port # No ports are listed > $ devlink lc > pci/0000:01:00.0: > lc 1 state unprovisioned > supported_types: > 16x100G > lc 2 state unprovisioned > supported_types: > 16x100G > lc 3 state unprovisioned > supported_types: > 16x100G > lc 4 state unprovisioned > supported_types: > 16x100G > lc 5 state unprovisioned > supported_types: > 16x100G > lc 6 state unprovisioned > supported_types: > 16x100G > lc 7 state unprovisioned > supported_types: > 16x100G > lc 8 state unprovisioned > supported_types: > 16x100G > > Note that driver exposes list supported line card types. Currently > there is only one: "16x100G". > > To provision the slot #8: > > $ devlink lc set pci/0000:01:00.0 lc 8 type 16x100G > $ devlink lc show pci/0000:01:00.0 lc 8 > pci/0000:01:00.0: > lc 8 state active type 16x100G > supported_types: > 16x100G > $ devlink port > pci/0000:01:00.0/0: type notset flavour cpu port 0 splittable false > pci/0000:01:00.0/53: type eth netdev enp1s0nl8p1 flavour physical lc 8 port 1 splittable true lanes 4 > pci/0000:01:00.0/54: type eth netdev enp1s0nl8p2 flavour physical lc 8 port 2 splittable true lanes 4 > pci/0000:01:00.0/55: type eth netdev enp1s0nl8p3 flavour physical lc 8 port 3 splittable true lanes 4 > pci/0000:01:00.0/56: type eth netdev enp1s0nl8p4 flavour physical lc 8 port 4 splittable true lanes 4 > pci/0000:01:00.0/57: type eth netdev enp1s0nl8p5 flavour physical lc 8 port 5 splittable true lanes 4 > pci/0000:01:00.0/58: type eth netdev enp1s0nl8p6 flavour physical lc 8 port 6 splittable true lanes 4 > pci/0000:01:00.0/59: type eth netdev enp1s0nl8p7 flavour physical lc 8 port 7 splittable true lanes 4 > pci/0000:01:00.0/60: type eth netdev enp1s0nl8p8 flavour physical lc 8 port 8 splittable true lanes 4 > pci/0000:01:00.0/61: type eth netdev enp1s0nl8p9 flavour physical lc 8 port 9 splittable true lanes 4 > pci/0000:01:00.0/62: type eth netdev enp1s0nl8p10 flavour physical lc 8 port 10 splittable true lanes 4 > pci/0000:01:00.0/63: type eth netdev enp1s0nl8p11 flavour physical lc 8 port 11 splittable true lanes 4 > pci/0000:01:00.0/64: type eth netdev enp1s0nl8p12 flavour physical lc 8 port 12 splittable true lanes 4 > pci/0000:01:00.0/125: type eth netdev enp1s0nl8p13 flavour physical lc 8 port 13 splittable true lanes 4 > pci/0000:01:00.0/126: type eth netdev enp1s0nl8p14 flavour physical lc 8 port 14 splittable true lanes 4 > pci/0000:01:00.0/127: type eth netdev enp1s0nl8p15 flavour physical lc 8 port 15 splittable true lanes 4 > pci/0000:01:00.0/128: type eth netdev enp1s0nl8p16 flavour physical lc 8 port 16 splittable true lanes 4 > > To uprovision the slot #8: > > $ devlink lc set pci/0000:01:00.0 lc 8 notype > are there any changes from the last RFC? https://lore.kernel.org/netdev/20210122094648.1631078-1-jiri@resnulli.us/
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