got 'bad mbi comp_stat 5' during DIOCGCACHE under Parallels, according
to linux driver it's possible status when controller thinks the CCB is invalid;
handle same as BHA_MBI_ABORT/BHA_MBI_UNKNOWN i.e. just clear the CCB anyway

Remove clause 3 and 4 from TNF licenses

branches: 1.19.70; 1.19.72; 1.19.74;
merge ktrace-lwp.

Part 1 of a cleanup pass over the SCSI subsystem. The aim is to name
everything "scsi_*", since we really are talking about the SCSI command
set, ATAPI transport not withstanding. Improve the names of many structures,
and prepend "SCSI_" onto all SCSI command opcodes. Place items described
by the SCSI Primary Commands document into scsi_spc.h.

branches: 1.17.8; 1.17.10;
Fix some typos. From Tom Cosgrove via jmc@openbsd.

branches: 1.16.22;
Pull up the thorpej_scsipi branch to main branch.
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

branches: 1.15.2;
Revert rev 1.31 of bha.c (and associtated changes in the headers and
config glue files).

Fixes PR kern/9841. Tested by Tracy J. Di Marco White with a bt948
and 6 disks.

branches: 1.14.4;
Make the bitfields in here work on big-endian machines. How this ever
worked is unclear.

Patch from thorpej, tested by me.

branches: 1.13.2;
Rework the Buslogic SCSI driver in preparation for some pending improvements
to the SCSIPI subsystem.
- Determine more characteristics about the board, including the number
of concurrent commands that the processor can execute at a time.
- Rework memory allocation strategy so that we can do dynamic pre-allocation
of resources according to workload.

Thanks to the Linux Buslogic driver for having some useful comments.

Assign my copyrights to TNF.

- Perform all necessary bus_dmamap_sync() operations.
- Greatly simplify allocation and DMA mapping of the mailbox and ccbs.
- Be more robust against resource shortage errors, and report errors better.

Reply from an INQUIRE DEVICES is a lun map.

branches: 1.9.2;
Make `hashkey' unsigned.

Merge scsipi branch in the mainline. This add support for ATAPI devices
(currently only CD-ROM drives on i386). The sys/dev/scsipi system provides 2
busses to which devices can attach (scsibus and atapibus). This needed to
change some include files and structure names in the low level scsi drivers.

branches: 1.7.2; 1.7.4;
Pull thorpej-bus-dma branch into mainline.

branches: 1.6.8;
typo in definition of extended-geometry register.

Deal with targets > 7 on wide Buslogic controllers. Remember the "wide"
bit from the extended setup inquiry and key off it to:
- Force synchronous negotiation on targs > 7.
- Read additional information returned by wide cards on inquire setup.
- Read sync period on targs > 7.
- Display sync period/offset on targs > 7.
- Set scsi_link.max_target to 15.
cvs: ----------------------------------------------------------------------

Add missing fields to the extended_inquire reply struct.
Fixes probing of aha154x's, and provides wide/ultra bits for the MI scsi code.

* Add command struct and modifier definitions for controlling the
ISA-compatible port space of PCI buslogic cards.

* Add call to bha_pci.c to disable the ISA-compatible ports of a PCI
device. The ISA-compatible ports are enabled by default, which
causes the card to be autoconfigured a second time as an ISA device,
which appears to deadlock the card.

* Change bha_cmd() to return the number of bytes it actually received
in response to a command, or -1 on error.

* Use heuristics (checking for bha-only registers, and checking the size
of the response to BHA_INQURE_EXTENDED) to bha_find, to make sure the
bha driver never matches an aha (Adaptec 1542 or compatible) device.

A single kernel should now boot on either Adaptec or BusLogic controllers,
provided we always probe for BusLogic devices before Adaptec devices,
but this has not yet been verified.

Minor changes.

Split the BusLogic driver apart, and rename it to `bha (like BSDi).