On Mon, Mar 01, 2021 at 09:04:20AM +0200, Leon Romanovsky wrote: > From: Mark Bloch <mbloch@xxxxxxxxxx> > > Current code uses many different types when dealing with a port of a > RDMA device: u8, unsigned int and u32. Switch to u32 to clean up the > logic. > > This allows us to make (at least) the core view consistent and use the same > type. Unfortunately not all places can be converted. Many uverbs functions > expect port to be u8 so keep those places in order not to break UAPIs. > HW/Spec defined values must also not be changed. > > With the switch to u32 we now can support devices with more than 255 > ports. U32_MAX is reserved to make control logic a bit easier to deal > with. As a device with U32_MAX ports probably isn't going to happen any > time soon this seems like a non issue. > > When a device with more than 255 ports is created uverbs will report > the RDMA device as having 255 ports as this is the max currently supported. > > The verbs interface is not changed yet because the IBTA spec limits the > port size in too many places to be u8 and all applications that relies in > verbs won't be able to cope with this change. At this stage, we are > extending the interfaces that are using vendor channel solely > > Once the limitation is lifted mlx5 in switchdev mode will be able to have > thousands of SFs created by the device. As the only instance of an RDMA > device that reports more than 255 ports will be a representor device > and it exposes itself as a RAW Ethernet only device CM/MAD/IPoIB and other > ULPs aren't effected by this change and their sysfs/interfaces that > are exposes to userspace can remain unchanged. > > While here cleanup some alignment issues and remove unneeded sanity > checks (mainly in rdmavt), > > Signed-off-by: Mark Bloch <mbloch@xxxxxxxxxx> > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx> > --- Jason, ping Thanks
