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SubjectRe: linux-next: manual merge of the xen-tip tree with the tree
On Wed, 30 Oct 2013, Stefano Stabellini wrote:
> Looks fine thanks!
> Just an heads up: I'll be updating the Xen code below soon so this
> conflict might come up again.

Just to be clear: I meant the dma_capable function.
Sorry for top posting.


> On Wed, 30 Oct 2013, Stephen Rothwell wrote:
> > Hi all,
> >
> > Today's linux-next merge of the xen-tip tree got a conflict in
> > arch/arm/include/asm/dma-mapping.h between commit 223016339ce7 ("ARM:
> > 7805/1: mm: change max*pfn to include the physical offset of memory")
> > from the arm tree and commit 06e6295bcece ("arm: make SWIOTLB available")
> > from the xen-tip tree.
> >
> > I fixed it up (see below) and can carry the fix as necessary (no action
> > is required).
> >
> > --
> > Cheers,
> > Stephen Rothwell sfr@canb.auug.org.au
> >
> > diff --cc arch/arm/include/asm/dma-mapping.h
> > index 863cd84eb1a2,f5945d4e4e9f..000000000000
> > --- a/arch/arm/include/asm/dma-mapping.h
> > +++ b/arch/arm/include/asm/dma-mapping.h
> > @@@ -87,13 -98,42 +99,49 @@@ static inline dma_addr_t virt_to_dma(st
> > }
> > #endif
> >
> > +/* The ARM override for dma_max_pfn() */
> > +static inline unsigned long dma_max_pfn(struct device *dev)
> > +{
> > + return PHYS_PFN_OFFSET + dma_to_pfn(dev, *dev->dma_mask);
> > +}
> > +#define dma_max_pfn(dev) dma_max_pfn(dev)
> > +
> > + static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
> > + {
> > + unsigned int offset = paddr & ~PAGE_MASK;
> > + return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
> > + }
> > +
> > + static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
> > + {
> > + unsigned int offset = dev_addr & ~PAGE_MASK;
> > + return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset;
> > + }
> > +
> > + static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
> > + {
> > + u64 limit, mask;
> > +
> > + if (dev->dma_mask)
> > + mask = *dev->dma_mask;
> > + else
> > + mask = dev->coherent_dma_mask;
> > +
> > + if (mask == 0)
> > + return 0;
> > +
> > + limit = (mask + 1) & ~mask;
> > + if (limit && size > limit)
> > + return 0;
> > +
> > + if ((addr | (addr + size - 1)) & ~mask)
> > + return 0;
> > +
> > + return 1;
> > + }
> > +
> > + static inline void dma_mark_clean(void *addr, size_t size) { }
> > +
> > /*
> > * DMA errors are defined by all-bits-set in the DMA address.
> > */
> >
>


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