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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-07-29 13:38:53 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-29 12:12:48 +0200 |
| commit | 8978b74253280d59e97cf49a3ec2c0cbccd5b801 (patch) | |
| tree | 7cecd6951437f01f541178c1afc14d4e1d2e2b23 | |
| parent | 35780c8ea7ad5c6d5483244d5f5bf37176fda86a (diff) | |
| download | linux-stable-8978b74253280d59e97cf49a3ec2c0cbccd5b801.tar.gz linux-stable-8978b74253280d59e97cf49a3ec2c0cbccd5b801.tar.bz2 linux-stable-8978b74253280d59e97cf49a3ec2c0cbccd5b801.zip | |
generic, x86: fix add iommu_num_pages helper function
This IOMMU helper function doesn't work for some architectures:
http://marc.info/?l=linux-kernel&m=121699304403202&w=2
It also breaks POWER and SPARC builds:
http://marc.info/?l=linux-kernel&m=121730388001890&w=2
Currently, only x86 IOMMUs use this so let's move it to x86 for
now.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 8 | ||||
| -rw-r--r-- | include/asm-x86/iommu.h | 2 | ||||
| -rw-r--r-- | include/linux/iommu-helper.h | 1 | ||||
| -rw-r--r-- | lib/iommu-helper.c | 8 |
4 files changed, 10 insertions, 9 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 8dbffb846de9..87d4d6964ec2 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -123,6 +123,14 @@ void __init pci_iommu_alloc(void) pci_swiotlb_init(); } + +unsigned long iommu_num_pages(unsigned long addr, unsigned long len) +{ + unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE); + + return size >> PAGE_SHIFT; +} +EXPORT_SYMBOL(iommu_num_pages); #endif /* diff --git a/include/asm-x86/iommu.h b/include/asm-x86/iommu.h index ecc8061904a9..5f888cc5be49 100644 --- a/include/asm-x86/iommu.h +++ b/include/asm-x86/iommu.h @@ -7,6 +7,8 @@ extern struct dma_mapping_ops nommu_dma_ops; extern int force_iommu, no_iommu; extern int iommu_detected; +extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len); + #ifdef CONFIG_GART_IOMMU extern int gart_iommu_aperture; extern int gart_iommu_aperture_allowed; diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h index f8598f583944..c975caf75385 100644 --- a/include/linux/iommu-helper.h +++ b/include/linux/iommu-helper.h @@ -8,4 +8,3 @@ extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, unsigned long align_mask); extern void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr); -extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len); diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c index 889ddce2021e..a3b8d4c3f77a 100644 --- a/lib/iommu-helper.c +++ b/lib/iommu-helper.c @@ -80,11 +80,3 @@ void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr) } } EXPORT_SYMBOL(iommu_area_free); - -unsigned long iommu_num_pages(unsigned long addr, unsigned long len) -{ - unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE); - - return size >> PAGE_SHIFT; -} -EXPORT_SYMBOL(iommu_num_pages); |