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From: Keith Packard <keithp@keithp.com>
To: benh@kernel.crashing.org
Cc: keithp@keithp.com, Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@elte.hu>,
	nickpiggin@yahoo.com.au, airlied@linux.ie,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	jbarnes@virtuousgeek.org, dri-devel@lists.sf.net,
	yinghai@kernel.org, Peter Anvin <hpa@zytor.com>
Subject: Re: Adding kmap_atomic_prot_pfn  (was: [git pull] drm patches for 2.6.27-rc1)
Date: Thu, 23 Oct 2008 22:37:40 -0700	[thread overview]
Message-ID: <1224826660.22877.83.camel@koto.keithp.com> (raw)
In-Reply-To: <1224818645.7654.431.camel@pasglop>

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On Fri, 2008-10-24 at 14:24 +1100, Benjamin Herrenschmidt wrote:

> I'm not that fan of carrying a mapping with a struct resource because if
> we do that we should probably also refcount the mapping, and then there
> is the whole question of mappings with different attributes, etc etc...

I'm fine with sticking the mapping in a separate structure; it's just
the return from ioremap_wc on 64-bit systems, and nothing at all on
32-bit systems. I don't really see the advantage of moving it into the
resource, especially as we may need different access modes (UC vs WC)
for different portions of a single BAR.

We may want to add some bounds and access mode information to this
structure to check for broken drivers.

-- 
keith.packard@intel.com

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  reply	other threads:[~2008-10-24  5:39 UTC|newest]

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-17 21:29 [git pull] drm patches for 2.6.27-rc1 Dave Airlie
2008-10-17 22:43 ` Linus Torvalds
2008-10-18  2:10   ` Eric Anholt
2008-10-18  2:47     ` Linus Torvalds
2008-10-18  3:49       ` Keith Packard
2008-10-18  6:44         ` Corbin Simpson
2008-10-18  7:49       ` Eric Anholt
2008-10-19 17:52         ` Peter Zijlstra
2008-10-20  4:17           ` Steven J Newbury
2008-10-20 16:31         ` Linus Torvalds
2008-10-20 20:04     ` Jesse Barnes
2008-10-18  9:11   ` Dave Airlie
2008-10-18  1:37 ` Nick Piggin
2008-10-18 19:11   ` Keith Packard
2008-10-18 19:31     ` Linus Torvalds
2008-10-18 20:07       ` Thomas Hellström
2008-10-18 20:20       ` Keith Packard
2008-10-18 20:37       ` Ingo Molnar
2008-10-18 21:51         ` Keith Packard
2008-10-18 22:32           ` Ingo Molnar
2008-10-18 22:47             ` Jon Smirl
2008-10-18 22:53               ` Linus Torvalds
2008-10-19  0:38             ` Keith Packard
2008-10-19  1:06               ` Arjan van de Ven
2008-10-19  1:15                 ` Keith Packard
2008-10-20 10:01               ` Ingo Molnar
2008-10-19  4:14             ` Keith Packard
2008-10-19  6:41               ` Keith Packard
2008-10-19 17:53                 ` io resources and cached mappings (was: [git pull] drm patches for 2.6.27-rc1) Ingo Molnar
2008-10-19 18:00                   ` Arjan van de Ven
2008-10-19 19:07                   ` Eric Anholt
2008-10-20 11:55                     ` Ingo Molnar
2008-10-20 12:20                       ` Ingo Molnar
2008-10-19 21:04                   ` Keith Packard
2008-10-20 11:58                     ` Ingo Molnar
2008-10-20 15:49                       ` Keith Packard
2008-10-22  9:36                         ` Ingo Molnar
2008-10-23  7:14                           ` Keith Packard
2008-10-23  7:14                             ` [PATCH] Add io-mapping functions to dynamically map large device apertures Keith Packard
2008-10-23  7:14                               ` [PATCH] [drm/i915] Use io-mapping interfaces instead of a variety of mapping kludges Keith Packard
2008-10-24  4:49                               ` [PATCH] Add io-mapping functions to dynamically map large device apertures Randy Dunlap
2008-10-24  6:26                                 ` Keith Packard
2008-10-23  8:05                             ` io resources and cached mappings (was: [git pull] drm patches for 2.6.27-rc1) Ingo Molnar
2008-10-23 15:39                               ` Keith Packard
2008-11-03  7:00                                 ` Dave Airlie
2008-11-03 10:48                                   ` Ingo Molnar
2008-11-03 16:36                                   ` Linus Torvalds
2008-11-03 16:53                                     ` Ingo Molnar
2008-11-03 17:29                                       ` [git pull] IO mappings, #2 Ingo Molnar
2008-11-04 22:36                                         ` Jonathan Corbet
2008-11-05  9:01                                           ` Ingo Molnar
2008-10-23 20:22                           ` Adding kmap_atomic_prot_pfn (was: [git pull] drm patches for 2.6.27-rc1) Keith Packard
2008-10-23 20:38                             ` Andrew Morton
2008-10-23 21:03                               ` Keith Packard
2008-10-23 21:24                               ` Linus Torvalds
2008-10-24  1:50                                 ` Keith Packard
2008-10-24  2:48                                   ` Linus Torvalds
2008-10-24  3:24                                     ` Benjamin Herrenschmidt
2008-10-24  5:37                                       ` Keith Packard [this message]
2008-10-24 14:53                                         ` Linus Torvalds
2008-10-24 15:45                                           ` Keith Packard
2008-10-24  4:29                                     ` Keith Packard
2008-10-24  6:22                                     ` Keith Packard
2008-10-24  7:33                                       ` Adding kmap_atomic_prot_pfn Thomas Hellström
2008-10-24  8:38                                         ` Ingo Molnar
2008-10-24  9:19                                           ` Thomas Hellström
2008-10-24  9:32                                             ` Ingo Molnar
2008-10-24 11:04                                               ` Thomas Hellström
2008-10-24 15:48                                         ` Keith Packard
2008-10-24 10:18                                           ` Thomas Hellström
2008-10-24  9:14                                     ` Adding kmap_atomic_prot_pfn (was: [git pull] drm patches for 2.6.27-rc1) Ingo Molnar
2008-10-24  3:21                                 ` Benjamin Herrenschmidt
2008-10-20 10:10                   ` io resources and cached mappings " Ingo Molnar
2008-10-19  4:28             ` [git pull] drm patches for 2.6.27-rc1 Yinghai Lu
2008-10-19  3:14       ` Nick Piggin

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