completion routine so that the completion routine can reentrantly
process the queue. This happens, for example. when polling is turned
on by entering the debugger by keystroke.
flag and a callback function which gets called whenever a target is
selected on a channel.
The macppc wdc driver needs to reprogram its timing register
differently for each target on a channel each time that target is
selected. I also changed the ATA4_TIME_TO_TICK to use a divisor of
15, which brings our timing calculations consistent with darwin.
These patches fix problems on my dual usb ibook with combo dvd/cdrw
drive because the hard drive supports udma and the combo drive does
not. Without turning off the udma timings in the configuration
register, I cannot access the non-udma combo drive.
an interrupt anyway, just in case. Otherwise, report the timout condition.
This works around a problem in my ibook if a key is pressed after boot
and before adb is configured, such as when booting with -d.
to its currently enabled warnings. For the lack of a better place, most
global function prototype wound up in <machine/autoconf.h> unless there
was a better place for them. ofb_* structs renamed to offb_* to avoid
conflict with ofb_softc in <dev/ofw/openfirm.h>
This is a completely rewritten scsipi_xfer execution engine, and the
associated changes to HBA drivers. Overview of changes & features:
- All xfers are queued in the mid-layer, rather than doing so in an
ad-hoc fashion in individual adapter drivers.
- Adapter/channel resource management in the mid-layer, avoids even trying
to start running an xfer if the adapter/channel doesn't have the resources.
- Better communication between the mid-layer and the adapters.
- Asynchronous event notification mechanism from adapter to mid-layer and
peripherals.
- Better peripheral queue management: freeze/thaw, sorted requeueing during
recovery, etc.
- Clean separation of peripherals, adapters, and adapter channels (no more
scsipi_link).
- Kernel thread for each scsipi_channel makes error recovery much easier
(no more dealing with interrupt context when recovering from an error).
- Mid-layer support for tagged queueing: commands can have the tag type
set explicitly, tag IDs are allocated in the mid-layer (thus eliminating
the need to use buggy tag ID allocation schemes in many adapter drivers).
- support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command
will be requeued, or a REQUEST SENSE will be sent as appropriate.
Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge
dbj