We cannot sleep during cam proto_announce and sbuf sleeps so use
a static length buffer like nvme(4)
Reviewed by: kibab
Differential Revision: https://reviews.freebsd.org/D25949
This is a generic function start a scan request for the given
cam_sim.
Other driver can now just use this function to request a new rescan.
Submitted by: kibab
Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's
flexible queueing will make it easier to write non-storage drivers
than the legacy stack. SDIO drivers from both the kernel and as
userland daemons are possible, though much of that functionality will
come later.
Some of the CAM integration isn't complete (there are sleeps in the
device probe state machine, for example), but those minor issues can
be improved in-tree more easily than out of tree and shouldn't gate
progress on other fronts. Appologies to reviews if specific items
have been overlooked.
Submitted by: Ilya Bakulin
Reviewed by: emaste, imp, mav, adrian, ian
Differential Review: https://reviews.freebsd.org/D4761
merge with first commit, various compile hacks.
