CVS commit: [netbsd-9] src/sys/arch/mips/cavium

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Tue May 19 17:35:51 UTC 2020

Modified Files:
        src/sys/arch/mips/cavium [netbsd-9]: octeonvar.h
        src/sys/arch/mips/cavium/dev [netbsd-9]: octeon_rnm.c octeon_rnmreg.h

Log Message:
Pull up following revision(s) (requested by simonb in ticket #918):

        sys/arch/mips/cavium/dev/octeon_rnm.c: revision 1.3
        sys/arch/mips/cavium/dev/octeon_rnm.c: revision 1.4
        sys/arch/mips/cavium/dev/octeon_rnm.c: revision 1.5
        sys/arch/mips/cavium/dev/octeon_rnm.c: revision 1.6 (+ patch)
        sys/arch/mips/cavium/dev/octeon_rnmreg.h: revision 1.2
        sys/arch/mips/cavium/dev/octeon_rnmreg.h: revision 1.3
        sys/arch/mips/cavium/octeonvar.h: revision 1.7

Add a few more bits.
XXX convert to __BITS.
--
If bus_space_map fails, just don't attach the driver instead of panicing.
Check RNG built in self test, don't attach if that fails too.
--
Oceton RNG/RNM driver modernisation to fit new entropy world order by
riastradh@, with some tweaks to get working in RNG mode.
XXX TODO: work out how to get raw entropy mode working.
--
Rework octeon_rnm(4) random number generator driver.
- Do a little on-line self-test for fun.
- Draw raw samples from the ring oscillators.
- Draw substantially more samples:
  =3D> early RO samples seem to have considerably lower entropy
  =3D> consecutive RO samples are not independent
- Make sure to use rnd_add_data_sync in the callback.
  =3D> not technically needed in HEAD, but would be needed for pullup
--
Adjust entropy estimate for the Octeon.
We are hedging in serial and in parallel, and more conservative than
the Linux driver from Cavium seems to be, so although I don't know
exactly what the thermal jitter of the device is, this seems like a
reasonable compromise.


To generate a diff of this commit:
cvs rdiff -u -r1.6 -r1.6.6.1 src/sys/arch/mips/cavium/octeonvar.h
cvs rdiff -u -r1.2 -r1.2.4.1 src/sys/arch/mips/cavium/dev/octeon_rnm.c
cvs rdiff -u -r1.1 -r1.1.26.1 src/sys/arch/mips/cavium/dev/octeon_rnmreg.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.