Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754495AbZLNDmr (ORCPT ); Sun, 13 Dec 2009 22:42:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754371AbZLNDmo (ORCPT ); Sun, 13 Dec 2009 22:42:44 -0500 Received: from sh.osrg.net ([192.16.179.4]:54267 "EHLO sh.osrg.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754362AbZLNDmm (ORCPT ); Sun, 13 Dec 2009 22:42:42 -0500 From: FUJITA Tomonori To: mingo@elte.hu Cc: yinghai@kernel.org, linux-kernel@vger.kernel.org, fujita.tomonori@lab.ntt.co.jp Subject: [PATCH 2/2] x86: gart: fix breakage due to IOMMU initialization cleanup Date: Mon, 14 Dec 2009 11:52:15 +0900 Message-Id: <1260759135-6450-3-git-send-email-fujita.tomonori@lab.ntt.co.jp> X-Mailer: git-send-email 1.5.6.5 In-Reply-To: <1260759135-6450-1-git-send-email-fujita.tomonori@lab.ntt.co.jp> References: <1260759135-6450-1-git-send-email-fujita.tomonori@lab.ntt.co.jp> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (sh.osrg.net [192.16.179.4]); Mon, 14 Dec 2009 12:41:33 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2771 Lines: 83 From: Yinghai Lu This fixes the following breakage of the commit 75f1cdf1dda92cae037ec848ae63690d91913eac: - GART systems that don't AGP with broken BIOS and more than 4GB memory are forced to use swiotlb. They can allocate aperture by hand and use GART. - GART systems without GAP must disable GART on shutdown. - swiotlb usage is forced by the boot option, gart_iommu_hole_init() is not called. so we disable GART early_gart_iommu_check(). Signed-off-by: Yinghai Lu Signed-off-by: FUJITA Tomonori --- arch/x86/kernel/aperture_64.c | 11 ++++++----- arch/x86/kernel/pci-gart_64.c | 3 ++- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c index e0dfb68..3704997 100644 --- a/arch/x86/kernel/aperture_64.c +++ b/arch/x86/kernel/aperture_64.c @@ -280,7 +280,8 @@ void __init early_gart_iommu_check(void) * or BIOS forget to put that in reserved. * try to update e820 to make that region as reserved. */ - int i, fix, slot; + u32 agp_aper_base = 0, agp_aper_order = 0; + int i, fix, slot, valid_agp = 0; u32 ctl; u32 aper_size = 0, aper_order = 0, last_aper_order = 0; u64 aper_base = 0, last_aper_base = 0; @@ -290,6 +291,8 @@ void __init early_gart_iommu_check(void) return; /* This is mostly duplicate of iommu_hole_init */ + agp_aper_base = search_agp_bridge(&agp_aper_order, &valid_agp); + fix = 0; for (i = 0; i < ARRAY_SIZE(bus_dev_ranges); i++) { int bus; @@ -342,10 +345,10 @@ void __init early_gart_iommu_check(void) } } - if (!fix) + if (valid_agp) return; - /* different nodes have different setting, disable them all at first*/ + /* disable them all at first */ for (i = 0; i < ARRAY_SIZE(bus_dev_ranges); i++) { int bus; int dev_base, dev_limit; @@ -458,8 +461,6 @@ out: if (aper_alloc) { /* Got the aperture from the AGP bridge */ - } else if (!valid_agp) { - /* Do nothing */ } else if ((!no_iommu && max_pfn > MAX_DMA32_PFN) || force_iommu || valid_agp || diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c index e6a0d40..56c0e73 100644 --- a/arch/x86/kernel/pci-gart_64.c +++ b/arch/x86/kernel/pci-gart_64.c @@ -710,7 +710,8 @@ static void gart_iommu_shutdown(void) struct pci_dev *dev; int i; - if (no_agp) + /* don't shutdown it if there is AGP installed */ + if (!no_agp) return; for (i = 0; i < num_k8_northbridges; i++) { -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/