jedec_dimm(4): Add manufacturing year and week.

[rpokala]

Summary

DDR3 and DDR4 encode the week and year that the DIMM was manufactured,
as a pair of two-digit binary-coded decimal values. Read the values, and
report them as (uint8_t)s.

Tested by: Nick Mills (Panasas)
MFC after: 1 week
Sponsored by: Panasas

[rpokala]

Update the date for the manpage.

[rpokala]

Describe new fields in jedec_dimm.4

[jhb]

sys/dev/jedec_dimm/jedec_dimm.c

883

Maybe use __assert_unreachable() here since the caller has already checked this?

[rpokala]

sys/dev/jedec_dimm/jedec_dimm.c

883

There are a few other bits of cleanup/refactoring that I'm going to do a bit later; I'll add this to the list.

[imp]

modulo a minor quibble over the copyright form, this looks good to me too (agree with john's comments, but also agree with your answer)

sys/dev/jedec_dimm/jedec_dimm.h

6

typically we'd use a '-' here rather than a ',' since ranges of copyright years are all that are really needed.... Unless your IP department insists on the comma, please consider changing.

[rpokala]

Reformat copyright, per imp@'s request.

[rpokala]

sys/dev/jedec_dimm/jedec_dimm.c

883

Cleanup is out for review in https://reviews.freebsd.org/D39842

[imp]

like the changes, and nothing further catches my eye.