Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Define additional commands.

Obtained from: Linux

Whitespace cleanup.

- Add comments.
- Add more command defines and data structures.
- Re-organize struct ida_drive_info to factor out struct ida_drive_info
which will be used elsewhere.

style(9): single tab after #define.

use __packed.

The DEC version of the Smart controller has its configuration information
stored at a different location in the PCI space, so adjust accordingly.

Also, when using more than two smart controllers in one machine, the
disks were assigned the wrong drive number; fix this as well.

- Define registers as offsets from register base rather than offsets from
EISA slot base.
- Remove unused IOPORT resource.

Reviewed by: jlemon

Add support for older EISA compaq cards and newer Smart 4200 cards.
Change disk names to `idad' to avoid naming conflicts with the controller,
and enable the new disk code to pick up the drives.

Tested by: david.w.james@bt.com (existing compaq support)
Reviewed by: msmith
Approved by: jordan

$Id$ -> $FreeBSD$

Compaq Smart RAID driver for -current. Based on the original ida.c
driver by Mark Dawson. This probably needs some work, but is stable
enough to boot a RAID-only configuration, and survive `make world'.