- Add per-controller configuration (sx) and I/O (mutex) locks. The
configuration lock protects the relationship of volumes and drives
while the I/O lock protects access to the controller's registers and
the main I/O path.
- Remove some checks for M_WAITOK malloc()'s failing.
- Remove the explicit bus space tag/handle from the softc and use
bus_*() rather than bus_space_*().
- Reuse the existing new-bus sysctl context instead of creating a
new one.
- Remove compat shims for FreeBSD 4.x.
- Use pci_enable_busmaster() rather than doing it by hand, and rely
on bus_alloc_resource() to enable PCI I/O decoding.
Tested by: Mike Tancsa mike sentex net
Reviewed by: scottl (partially)
MFC after: 1 month
06e8730c59