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[PATCH] x86_64: IOMMU printk cleanup

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This patch contains a printk reorder to remove the current problem of
displaying "PCI-DMA: Disabling IOMMU." and then "PCI-DMA: using GART
IOMMU" 20 lines later in dmesg.

It also constains a printk reorder in swiotlb to state swiotlb
enablement prior to describing the location of the bounce buffers, and a
printk reorder to state gart enablement prior to describing the
aperature.

Also constains a whitespace cleanup in arch/x86_64/kernel/setup.c

Tested (along with patch 2/2) on dual opteron with gart enabled,
iommu=soft, and iommu=off.

Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jon Mason 2006-02-03 21:51:59 +01:00 committed by Linus Torvalds
parent 14c3f85587
commit 5b7b644ca9
4 changed files with 11 additions and 10 deletions
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10
arch/x86_64/kernel/pci-gart.c
View file

@ -645,9 +645,18 @@ static int __init pci_iommu_init(void)
(no_agp && init_k8_gatt(&info) < 0)) {
no_iommu = 1;
no_iommu_init();
printk(KERN_INFO "PCI-DMA: Disabling IOMMU.\n");
if (end_pfn > MAX_DMA32_PFN) {
printk(KERN_ERR "WARNING more than 4GB of memory "
"but IOMMU not compiled in.\n"
KERN_ERR "WARNING 32bit PCI may malfunction.\n"
KERN_ERR "You might want to enable "
"CONFIG_GART_IOMMU\n");
}
return -1;
}
printk(KERN_INFO "PCI-DMA: using GART IOMMU.\n");
aper_size = info.aper_size * 1024 * 1024;
iommu_size = check_iommu_size(info.aper_base, aper_size);
iommu_pages = iommu_size >> PAGE_SHIFT;
@ -721,7 +730,6 @@ static int __init pci_iommu_init(void)
flush_gart(NULL);
printk(KERN_INFO "PCI-DMA: using GART IOMMU.\n");
dma_ops = &gart_dma_ops;
return 0;

7
arch/x86_64/kernel/pci-nommu.c
View file

@ -88,12 +88,5 @@ void __init no_iommu_init(void)
{
if (dma_ops)
return;
printk(KERN_INFO "PCI-DMA: Disabling IOMMU.\n");
dma_ops = &nommu_dma_ops;
if (end_pfn > MAX_DMA32_PFN) {
printk(KERN_ERR
"WARNING more than 4GB of memory but IOMMU not compiled in.\n"
KERN_ERR "WARNING 32bit PCI may malfunction.\n"
KERN_ERR "You might want to enable CONFIG_GART_IOMMU\n");
}
}

2
arch/x86_64/kernel/pci-swiotlb.c
View file

@ -35,8 +35,8 @@ void pci_swiotlb_init(void)
(end_pfn > MAX_DMA32_PFN || force_iommu))
swiotlb = 1;
if (swiotlb) {
swiotlb_init();
printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
swiotlb_init();
dma_ops = &swiotlb_dma_ops;
}
}

2
arch/x86_64/kernel/setup.c
View file

@ -741,7 +741,7 @@ void __init setup_arch(char **cmdline_p)
e820_setup_gap();
#ifdef CONFIG_GART_IOMMU
iommu_hole_init();
iommu_hole_init();
#endif
#ifdef CONFIG_VT