fsi/sbefifo problems on bmc

[Benjamin Herrenschmidt]

On Tue, 2019-07-02 at 10:24 -0500, Eddie James wrote:
> > On the first run we have no problems with fsi and sbefifo and no issues with
> > fifo or problems with switching from SOFTWARE_PGOOD to BMC_POWER_UP. In the
> > consequenced reboots we have unresponsive host and only manual powercycle helps.
> > 
> >   From my point of view it seems like the fsi slave became unresponsive which
> > resulted in the fifo problem and in problems with other stuff.
> > We're looking for some guidance on how to debug that. Maybe some hard fsi reset
> > via devmem could help?
> 
> 
> I believe Ben H. wrote the coldfire FSI stuff, and much of the SBEFIFO 
> driver... cc'ing him to see if he would like to help.

Nothing obvious comes to mind. Is basic CFAM access working ? Can you
check the SBE it still up and running and not crashed ?

You rescan FSI on power on ?

Cheers,
Ben.