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)

Fix a handful of issues with via agp support.

* Read the pci capability register to identify AGP 3 support
* Add missing smaller aperture sizes for AGP3 chips.
* Fix the aperture size calculation on AGP2 chips.
All sizes between 32M and 256M reported as 256M.
* Add \n to error string.

This all seems to get the CLE266 EPIA-M board agp working properly, now
back to work on drm.

MFC after: 2 weeks

vm_offset_t is unsigned and therefore can not be negative.
Avoid unnessecary compares.

Found with: Coverity Prevent(tm)
CID: 2362,4215,4214,4209,4208,2363,4211,4210,4213,4212

MFC after: 3 days

Fix prototypes to be consistent.

- Add few VIA bridges to agp_via.c and connect it to amd64 build
as they support Intel Core/Core 2 and VIA Nano processors.
- Align "optional agp" in conf/files.* for consistency while I am here.

Move the agp(4) driver from sys/pci to sys/dev/agp. __FreeBSD_version was
bumped to 800004 to note the change though userland apps should not be
affected since they use <sys/agpio.h> rather than the headers in
sys/dev/agp.

Discussed with: anholt
Repocopy by: simon

Split agp_generic_detach() up into two routines: agp_free_cdev() destroys
/dev/agpgart and agp_free_res() frees resources like the BAR for the
aperture. Splitting this up lets chipset-specific detach routines
manipulate the aperture during their detach routines without panicing.

MFC after: 1 week
Reviewed by: anholt

- Add the device ID for the VIA VT3324 (CX700) chipset.
- Set and Get aperture size correctly for VIA's AGP3 chipsets.

Approved by: re (kensmith)

Change the various AGP drivers that attach to the Host-PCI bridge device to
attach to the hostb driver instead. This means that agp can now be loaded
at runtime (in theory at least). Also, the drivers no longer have to
explicity call device_verbose() to cancel out any earlier calls to
device_quiet() by the hostb(4) driver (this shows a limitation in new-bus,
drivers really shouldn't be doing device_quiet() until they know they are
going to drive that device, i.e. in attach).

Make the initialization in the AGPv3 case match that of Linux. Fixes hangs on
X startup with DRI enabled, with a v3-capable card.

Tested by: Tom McLaughlin <tmclaugh@sdf.lonestar.org>
Approved by: re (scottl)

Return BUS_PROBE_DEFAULT instead of 0.

[1] Remove the generic bridge support from those drivers that had it. The
generic bridge support was biting us more than it helped, whenever a new chipset
came out from a vendor and misprogramming it caused strange hangs or corruption.
[2] Add a large number of PCI IDs based on what the linux drivers support.
Note that the new PCI IDs haven't been tested, they're just *likely* to work.
In particular the VIA AGP 8x chipsets are concerning, due to lack of testing,
possible issues (kern/69953), and not having a nice "does this bridge say it
would do 8x" function. However, this shouldn't make the situation worse, since
these chips would have probed in the past anyway.

Unconditionally support the AMD64 GART HW.

AMD64 on-CPU GART support.
This also applies to AMD64 HW running 'i386' OS.

Submitted by: Jung-uk Kim <jkim@niksun.com>
Integration by: obrien

Minimal fix to prevent crashes when an AGP v2 card is used with the new v3 VIA
chipsets, based on Linux's via-agp.c. On boot, the system selects which AGP
version to use based on the inserted card. If v2 was chosen, the chipset
needs to be programmed with the v2 registers still. Also included in kern/69953
are changes to make the programming of the v3 registers match linux, but that
will be left out until the need to do so is confirmed (want specs or a tester).

PR: kern/69953
Submitted by: Oleg Sharoiko <os@rsu.ru>
Tested by: Oleg Sharoiko <os@rsu.ru>, Geoff Speicher <geoff@speicher.org>
(full version from PR)

Add support for the VIA Apollo KT400/400A/600 AGP host bridges which use
the VIA v3 register offsets.

PR: 68545
Submitted by: Ariff Abdullah <skywizard@mybsd.org.my>

Add missing <sys/module.h> includes

Get rid of a lockmgr consumer by making agp(4) use a standard mutex,
since it's always acquiring the lock exclusively. This was tested
with X on an SMP box, with and without WITNESS.

Different VIA host bridges use different offsets to their AGP config
registers, so add a register offset array to the softc. We key off the
device ID to determine which set of register offsets. Currently the 8385
host bridge used on amd64 is the only bridge to use the AGP3_VIA_*
register offsets and all other bridges use the AGP_VIA_* offsets. It is
currently unclear if the AGP3_VIA_* offsets are for VIA bridges that
implement AGP 3.0 bridges or just for amd64 bridges.

Submitted by: Kenneth Culver culverk at sweetdreamsracing dot biz

Add the ability to disable agp devices at the loader prompt. Usage is
hint.agp.0.disabled="1"

Submitted by: jhb

Prefer new location of pci include files (which have only been in the
tree for two or more years now), except in a few places where there's
code to be compatible with older versions of FreeBSD.

Sort the list of PCI ID's in numerical order and fix a whitespace bogon.

Add a PCI ID for the Apollo Pro 133A.

PR: kern/46983
Submitted by: David Holm <david@realityrift.com>

Use __FBSDID().

- Express hard dependencies on bus (pci, isa, pccard) and
network layer (ether).
- Don't abuse module names to facilitate ifconfig module loading;
such abuse isn't really needed. (And if we do need type information
associated with a module then we should make it explicit and not
use hacks.)

Remove a bunch of #include "opt_pci.h".

Include <sys/lockmgr.h> for old lock interfaces instead of depending on
namespace pollution in <sys/lock.h>.

Recognise VIA Apollo KT133A bridge.

PR: 30061
Submitted by: John Merryweather Cooper <jmcoopr@webmail.bmi.net>
MFC after: 1 week

Make these compile again by adding proc.h include for GIANT_REQUIRED
that is in included vm headers.

Introduce a global lock for the vm subsystem (vm_mtx).

vm_mtx does not recurse and is required for most low level
vm operations.

faults can not be taken without holding Giant.

Memory subsystems can now call the base page allocators safely.

Almost all atomic ops were removed as they are covered under the
vm mutex.

Alpha and ia64 now need to catch up to i386's trap handlers.

FFS and NFS have been tested, other filesystems will need minor
changes (grabbing the vm lock when twiddling page properties).

Reviewed (partially) by: jake, jhb

A driver for programming the AGP hardware. This is only very lightly
tested on Intel BX chipsets only. The other agp minidrivers are totally
untested.

The programming api is a subset of the Linux api and is only intended to
be enough for the X server to use. There is also an in-kernel api for the
use of other kernel modules such as the 3D DRI.