PERFORCE change 162648 for review

[Alexander Motin]

http://perforce.freebsd.org/chv.cgi?CH=162648

Change 162648 by mav at mav_mavbook on 2009/05/24 14:47:18

	Add driver for AHCI SATA controller to be used as CAM SIM.
	Driver provides CAM native access to SATA devices reporting
	transport type XPORT_ATA and protocol type PROTO_ATA
	and supporting XPT_ATA_IO operation.
	
	Comparing to ataahci this driver has:
	- controller command queueing up to 32 slots (no NCQ yet);
	- proper DMA load operation without preallocation;
	It does not supports yet:
	- ATAPI;
	- Port Multipliers;
	- some parts of error reporting and recovery.
	
	At this moment driver hacked to only attach JMB363 controller.

Affected files ...

.. //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.c#1 add
.. //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.h#1 add
.. //depot/projects/scottl-camlock/src/sys/modules/ahci/Makefile#1 add

Differences ...