Date: Wed, 14 Dec 2005 21:32:03 -0600 From: Eric Anderson <anderson@centtech.com> To: John Baldwin <jhb@freebsd.org> Cc: anholt@freebsd.org, current@freebsd.org Subject: Re: hostb(4) and vgapci(4) patch Message-ID: <43A0E3B3.6030903@centtech.com> In-Reply-To: <200512141720.01572.jhb@freebsd.org> References: <200512141720.01572.jhb@freebsd.org>
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John Baldwin wrote: >I have a patch that is an attempt to untangle a few things in relation to >Host-PCI bridges and VGA PCI devices. Basically, the change is to create a >more "real" hostb driver as well as a new vgapci driver and to change agp, >drm, and acpi_video to attach to these drivers. This means among other >things: > >- In theory you can now kldload agp after boot since it still has a place to >attach to. >- i830/915 drm is no longer a child of agp, instead both become children of >vgapci0. >- You can now use acpi_video with drm as both attach as children of vgapci0. >- This provides a way for us to possibly solve the DPMS problem for >suspend/resume (including a cleaner way to do the hack dpms patch I posted to >acpi@ a long while ago that several people still use). > >Some other details include: > >- agp devices no longer map the _entire_ aperture into contiguous KVA meaning >that it might be possible now to use a 256 MB aperture without panicing >- I've added a new pci_if.m method for locating a specific capability for a >PCI device. > >I have tested this on my laptop and verified that dri still works, but it >needs some wider testing, especially the i830/i915 case is slightly more >complicated. Also, this is not going to work with the nvidia-driver >currently, but that's something that can be fixed in the future. If the agp >non-mapping does fix the 256 MB aperture issues then I will probably MFC that >part to RELENG_6. > >http://www.FreeBSD.org/~jhb/patches/agp_cvs.patch > > cc -c -O2 -pipe -fno-strict-aliasing -march=pentiumpro -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -fformat-extensions -std=c99 -g -nostdinc -I- -I. -I/usr/src/sys -I/usr/src/sys/contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -mno-align-long-strings -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -ffreestanding -Werror /usr/src/sys/pci/agp_i810.c /usr/src/sys/pci/agp_i810.c: In function `agp_i810_detach': /usr/src/sys/pci/agp_i810.c:463: warning: unused variable `child' *** Error code 1 Stop in /usr/obj/usr/src/sys/NEUTRINO. *** Error code 1 Stop in /usr/src. *** Error code 1 Stop in /usr/src. 7.0-CURRENT #48: Tue Dec 13 08:47:11 CST 2005 Anything else you would like? Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------
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