From: Paul Mackerras <paulus@samba.org>
To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Jesse Barnes <jbarnes@engr.sgi.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
werner@sgi.com, Linus Torvalds <torvalds@osdl.org>,
davej@redhat.com,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: AGP bogosities
Date: Sat, 12 Mar 2005 09:43:17 +1100 [thread overview]
Message-ID: <16946.7941.404582.764637@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <1110563965.4822.22.camel@eeyore>
Bjorn Helgaas writes:
> HP ia64 and parisc boxes are similar. The host bridges do not appear
> as PCI devices. We discover them via ACPI on ia64 and PDC on parisc.
On PPC/PPC64 machines, the host bridges generally do not appear as PCI
devices either. *However*, the AGP spec requires a set of registers
in PCI config space for controlling the target (host) side of the AGP
bus. In other words you are required to have a PCI device to
represent the host side of the AGP bus, with a capability structure in
its config space which contains the standard AGP registers.
The lspci that was posted showed no such device, which was why Ben was
querying it. Maybe your systems aren't fully AGP-compliant, in which
case much of the generic code won't be usable on your systems.
Paul.
next prev parent reply other threads:[~2005-03-11 22:45 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-11 1:24 Paul Mackerras
2005-03-11 2:04 ` Jesse Barnes
2005-03-11 2:11 ` Paul Mackerras
2005-03-11 2:18 ` Jesse Barnes
2005-03-11 2:38 ` Benjamin Herrenschmidt
2005-03-11 4:02 ` Jesse Barnes
2005-03-11 4:30 ` Benjamin Herrenschmidt
2005-03-11 16:39 ` Jesse Barnes
2005-03-11 17:59 ` Bjorn Helgaas
2005-03-11 18:04 ` Jesse Barnes
2005-03-12 3:27 ` Mike Werner
2005-03-12 3:58 ` Dave Jones
2005-03-13 3:13 ` Jesse Barnes
2005-03-13 4:08 ` Dave Jones
2005-03-13 4:28 ` Dave Jones
2005-03-11 22:43 ` Paul Mackerras [this message]
2005-03-11 23:22 ` Bjorn Helgaas
2005-03-12 0:12 ` Benjamin Herrenschmidt
2005-03-12 1:34 ` Paul Mackerras
2005-03-11 18:04 ` James Simmons
2005-03-11 18:08 ` Jesse Barnes
2005-03-11 2:04 ` Linus Torvalds
2005-03-11 2:12 ` Dave Jones
2005-03-11 2:18 ` Paul Mackerras
2005-03-11 2:23 ` Dave Jones
2005-03-11 2:40 ` Benjamin Herrenschmidt
2005-03-11 2:49 ` Dave Jones
2005-03-12 20:49 ` Greg KH
2005-03-11 2:42 ` Linus Torvalds
2005-03-11 22:18 ` OGAWA Hirofumi
2005-03-11 22:26 ` Dave Jones
2005-03-11 22:33 ` Chris Wedgwood
2005-03-11 23:52 ` Gene Heskett
2005-03-11 22:44 ` Linus Torvalds
2005-03-11 23:09 ` Paul Mackerras
2005-03-12 0:06 ` Gene Heskett
2005-03-14 8:17 ` Pavel Machek
2005-03-14 8:27 ` David Lang
2005-03-14 8:37 ` dmesg verbosity [was Re: AGP bogosities] Pavel Machek
2005-03-14 16:55 ` Jesse Barnes
2005-03-14 17:03 ` Pavel Machek
2005-03-14 17:17 ` Dave Jones
2005-03-14 17:18 ` Linus Torvalds
2005-03-14 17:27 ` Jesse Barnes
2005-03-14 17:27 ` Pavel Machek
2005-03-15 20:18 ` Greg Stark
2005-03-14 18:12 ` Diego Calleja
2005-03-14 19:07 ` Lee Revell
2005-03-20 6:44 ` David Lang
2005-03-23 0:37 ` Diego Calleja
2005-03-23 0:53 ` Lee Revell
2005-03-23 1:13 ` Dave Jones
2005-03-23 1:29 ` Andrew Morton
2005-03-23 8:21 ` Giuseppe Bilotta
2005-03-23 16:14 ` Dave Jones
2005-03-23 16:49 ` Giuseppe Bilotta
2005-03-23 17:17 ` Dave Jones
2005-03-23 14:10 ` Diego Calleja
2005-03-23 8:19 ` Giuseppe Bilotta
2005-03-30 9:45 ` Pavel Machek
2005-03-23 0:53 ` Zan Lynx
2005-03-23 0:55 ` Grant Coady
2005-03-14 21:55 ` Benjamin Herrenschmidt
2005-03-14 22:08 ` David Lang
2005-03-15 0:02 ` Pavel Machek
2005-03-11 22:42 ` AGP bogosities Dmitry Torokhov
2005-03-11 22:47 ` Dmitry Torokhov
2005-03-12 17:09 ` Linus Torvalds
2005-03-12 22:26 ` OGAWA Hirofumi
2005-03-12 22:34 ` Linus Torvalds
2005-03-11 2:35 ` Benjamin Herrenschmidt
2005-03-11 2:43 ` Dave Jones
2005-03-11 2:37 ` Linus Torvalds
2005-03-11 22:11 ` J.A. Magallon
2005-03-11 22:18 ` Dave Jones
2005-03-11 22:46 ` J.A. Magallon
2005-03-11 23:16 ` Martin Schlemmer
2005-03-11 23:17 ` J.A. Magallon
2005-03-11 23:23 ` Martin Schlemmer
2005-03-11 23:24 ` J.A. Magallon
2005-03-12 4:33 Ken Ryan
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