sbefifo userspace api

[Brad Bishop]

Looking to start a discussion around possible user space and kernel APIs for the POWER9 sbefifo driver.

There exists today an “alternate" sbefifo driver :-) that provides a single submit ioctl.  Applications submit a request and get a reply in single system call.

Is something like that the best approach for an upstream driver?  Or should we try something more "pipe like" with read/write interfaces?

Would the in-kernel API be the same as the user space API?

thx

-brad