required by arches like sparc64 (not yet implemented) and sun4v where there
are seperate IOMMU's for each PCI bus... For all other arches, it will
end up returning NULL, which makes it a no-op...
Convert a few drivers (the ones we've been working w/ on sun4v) to the
new convection... Eventually all drivers will need to replace the parent
tag of NULL, w/ bus_get_dma_tag(dev), though dev is usually different for
each driver, and will require hand inspection...
Reviewed by: scottl (earlier version)
of geometry. However, some platforms have a more complicated mapping
of the firmware values to the actual values. pc98 is the only
platform that currently does this. This mapping is necessary for
large disks connected to pc98 boxes, as the firmware labels require do
special hacks to the actual geometry for interoperability. We cannot
do this all in the geom layer because of initialization issues (geom
looks for an already initialized pc98 label, but we need the geometry
information prior to initialization, classic chicken and egg problem).
We pass the disk and the device_t to this function because the
geometry mapping depends on what kind of controller is used.
This hook allows platforms that want to override things to do so, and
has 0 overhead on all other platforms. These patches have been in use
locally for a long time, and received good feedback from the pc98
community and sos@ at various times during their development.
MFC After: 1 week
The register layout has changed since the original NV4 - sigh.
Hotplug support has been fixed for all nVidia chipsets that supports it
(including the MCP51/55).
HW donated by: Kingsley College
ATA framework. Mainly written to be able to use USB Flash keys.
This is work in progress so use with care :)
Doesn't need CAM and cannot coexist with umass.c
to call back for completition and something else is holding the taskqueue
waiting for ATA to return data.
This should clear up the "semaphore timeout !! DANGER Will Robinson !!"
in most situations, and log "taskqueue timeout - completing request directly"
instead, with a delayed "WARNING - freeing taskqueue zombie request" when
the taskqueue finally calls us back with the now stale request.
(It would have been nice if there was a way to remove a scheduled item from
a taskqueue, but that is not currently implemented in the kernel).
A real fix for this is in the works but wont make it to 6.1RELEASE
definite MFC candidate.
