Decode AGP capability.

kern/50453: Separate Pineview chipset from i915-family chipset support.

Should use AGP_I965_IFPADDR instead AGP_I915_IFPADDR in Pineview, becuase
AGP_I915_IFPADDR is used as PCIEXBAR.

branches: 1.22.4;
Get GTT size from PGTBL_CTL on G4X chipsets.

Implement Intel AGP chipset flush.

While here, fix the use of the I915 PCI MSAC register: it lies on the
bridge device (bus 0 dev 0 func 0), not the graphics device (bus 0
dev 2 func 0). I'm not sure we ever need to consult this register,
really -- the PCI BARs should be sized. But I'll leave a rototill of
this mess for another day.

branches: 1.20.26; 1.20.40;
Add support for the Intel G45 AGP. From Arnaud Lacombe

branches: 1.19.4; 1.19.10; 1.19.12; 1.19.14; 1.19.18;
Avoid unaligned pci_conf_read.

clean up the error bit clear code:
-use an aligned pci config space address as everyone else -- I'm sorry
about that because I like gson's way a lot -- it keeps the address
offset due to alignment visually close to the data shift --, but since
aligned addresses are used everywhere else in definitions, this
causes confusion
-the mask applied to the data didn't make much sense, a look at the
FreeBSD code where this code originates from suggests that there
was just a mistake -- one trailing zero missing --
anyway, the datasheet tells that the error bits are all write-one-
to-clear, so just write back the value and we are done

branches: 1.17.2; 1.17.6;
fix some PCI config space offsets to be 32-bit aligned, the code
did already do the right bit shifting

branches: 1.16.6;
Add agp support for Intel Q35/G33/Q33.

Merge bunch of AGP changes from jmcneill-pm.

branches: 1.14.2; 1.14.6; 1.14.8;
Add agp support for i965Q.

Based on a patch for FreeBSD by Eric Anholt.
OKed on tech-kern some months ago.

branches: 1.13.2;
Add support agp_amd64. Imported from FreeBSD.

branches: 1.12.2; 1.12.6;
Support more i915 stolen memory configurations (previous limit was 8MB,
some configurations steal up to 64MB). OK christos@

Add AGPv3 support to VIA AGP driver from FreeBSD.
I can now use DRI w/ AGP enabled on my r300.

branches: 1.10.24; 1.10.28; 1.10.30; 1.10.32;
PR/32550: Michael Eriksson: No agp(4) support for i915 integrated graphics

branches: 1.9.2;
merge ktrace-lwp.

branches: 1.8.2; 1.8.4;
nuke trailing whitespace

branches: 1.7.8; 1.7.10;
Use the right bits for the AGP version.

Add support for i855 agp. From FreeBSD.

Approved by: Frank van der Linden <fvdl@netbsd.org>

branches: 1.5.2;
The problem which stops in the middle of booting was solved.

(kern/21843 Brian Stark <bpstark@pacbell.net>)

fix some bugs

fix bug report - xsrc/17810, kern/16898

add AGP configuration registers for i840/855PM, i840/i850E, 82443LX/BX/GX
Although there chips are well alike, but initialization and so on procedures differ.

Add support for i830/i845 agp. From Shingo WATANABE (on tech-x11) and
FreeBSD, with cleanup/KNF by me.

Note: These chipsets are not well supported by the i810 driver in
NetBSD's in-tree xsrc (based on XFree86 4.2.1 at this time). However,
the driver works perfectly using bleeding-edge XFree86-current on my
Omnibook's i830MG with these agp changes.

branches: 1.1.2; 1.1.4; 1.1.6;
AGP GART support code. Originally written by Doug Rabson for FreeBSD,
modifications to fit it into the NetBSD device/config structure and
to use bus_dma by me.

kern/50453: Separate Pineview chipset from i915-family chipset support.

Should use AGP_I965_IFPADDR instead AGP_I915_IFPADDR in Pineview, becuase
AGP_I915_IFPADDR is used as PCIEXBAR.

branches: 1.22.4;
Get GTT size from PGTBL_CTL on G4X chipsets.

Implement Intel AGP chipset flush.

While here, fix the use of the I915 PCI MSAC register: it lies on the
bridge device (bus 0 dev 0 func 0), not the graphics device (bus 0
dev 2 func 0). I'm not sure we ever need to consult this register,
really -- the PCI BARs should be sized. But I'll leave a rototill of
this mess for another day.

branches: 1.20.26; 1.20.40;
Add support for the Intel G45 AGP. From Arnaud Lacombe

branches: 1.19.4; 1.19.10; 1.19.12; 1.19.14; 1.19.18;
Avoid unaligned pci_conf_read.

clean up the error bit clear code:
-use an aligned pci config space address as everyone else -- I'm sorry
about that because I like gson's way a lot -- it keeps the address
offset due to alignment visually close to the data shift --, but since
aligned addresses are used everywhere else in definitions, this
causes confusion
-the mask applied to the data didn't make much sense, a look at the
FreeBSD code where this code originates from suggests that there
was just a mistake -- one trailing zero missing --
anyway, the datasheet tells that the error bits are all write-one-
to-clear, so just write back the value and we are done

branches: 1.17.2; 1.17.6;
fix some PCI config space offsets to be 32-bit aligned, the code
did already do the right bit shifting

branches: 1.16.6;
Add agp support for Intel Q35/G33/Q33.

Merge bunch of AGP changes from jmcneill-pm.

branches: 1.14.2; 1.14.6; 1.14.8;
Add agp support for i965Q.

Based on a patch for FreeBSD by Eric Anholt.
OKed on tech-kern some months ago.

branches: 1.13.2;
Add support agp_amd64. Imported from FreeBSD.

branches: 1.12.2; 1.12.6;
Support more i915 stolen memory configurations (previous limit was 8MB,
some configurations steal up to 64MB). OK christos@

Add AGPv3 support to VIA AGP driver from FreeBSD.
I can now use DRI w/ AGP enabled on my r300.

branches: 1.10.24; 1.10.28; 1.10.30; 1.10.32;
PR/32550: Michael Eriksson: No agp(4) support for i915 integrated graphics

branches: 1.9.2;
merge ktrace-lwp.

branches: 1.8.2; 1.8.4;
nuke trailing whitespace

branches: 1.7.8; 1.7.10;
Use the right bits for the AGP version.

Add support for i855 agp. From FreeBSD.

Approved by: Frank van der Linden <fvdl@netbsd.org>

branches: 1.5.2;
The problem which stops in the middle of booting was solved.

(kern/21843 Brian Stark <bpstark@pacbell.net>)

fix some bugs

fix bug report - xsrc/17810, kern/16898

add AGP configuration registers for i840/855PM, i840/i850E, 82443LX/BX/GX
Although there chips are well alike, but initialization and so on procedures differ.

Add support for i830/i845 agp. From Shingo WATANABE (on tech-x11) and
FreeBSD, with cleanup/KNF by me.

Note: These chipsets are not well supported by the i810 driver in
NetBSD's in-tree xsrc (based on XFree86 4.2.1 at this time). However,
the driver works perfectly using bleeding-edge XFree86-current on my
Omnibook's i830MG with these agp changes.

branches: 1.1.2; 1.1.4; 1.1.6;
AGP GART support code. Originally written by Doug Rabson for FreeBSD,
modifications to fit it into the NetBSD device/config structure and
to use bus_dma by me.