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Message-Id: <20090507.113632.210373283.davem@davemloft.net> Date: Thu, 07 May 2009 11:36:32 -0700 (PDT) From: David Miller <davem@...emloft.net> To: dwmw2@...radead.org Cc: joerg.roedel@....com, fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org, mingo@...hat.com, airlied@...ux.ie Subject: Re: IOMMU and graphics cards From: David Woodhouse <dwmw2@...radead.org> Date: Thu, 07 May 2009 11:22:01 +0100 > On Thu, 2009-05-07 at 12:01 +0200, Joerg Roedel wrote: >> > Looks like the DRM code uses the DMA API. >> >> The proprietary drivers make problems so far. For the ATI one I am in >> contact with the developers to try to fix it. But I can't do anything >> about the other proprietary driver I am aware of :-( > > I see no harm in "breaking" code which was already broken. If that's the > only reason we're enabling the graphics workaround, let's turn it off. Seriously, this is an enormous price to pay just for one bad apple proprietary driver. I can't believe the level of concessions some people are suggesting. Let's not make IOMMU's basically useless by working around one broken driver. Proper interfaces for what this driver is trying to do have existed in the kernel for 10+ years. There are no excuses, and it's time for Nvidia to get with the game plan. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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