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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-09 16:56:32 +0000 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-09 16:56:32 +0000 |
| commit | 69908907b02efee31377af0cefbcd5a3ba66334a (patch) | |
| tree | 7348359ef60c91ca9edfd71680a858f28a7d156e /arch | |
| parent | 2f558d40911c1b8f929b8a382833ae1da5df3293 (diff) | |
| download | lwn-69908907b02efee31377af0cefbcd5a3ba66334a.tar.gz lwn-69908907b02efee31377af0cefbcd5a3ba66334a.zip | |
xen: make xen_create_contiguous_region return the dma address
Modify xen_create_contiguous_region to return the dma address of the
newly contiguous buffer.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Changes in v4:
- use virt_to_machine instead of virt_to_bus.
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/xen/mmu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index fdc3ba28ca38..6c34d7c03d5b 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -2329,7 +2329,8 @@ static int xen_exchange_memory(unsigned long extents_in, unsigned int order_in, } int xen_create_contiguous_region(unsigned long vstart, unsigned int order, - unsigned int address_bits) + unsigned int address_bits, + dma_addr_t *dma_handle) { unsigned long *in_frames = discontig_frames, out_frame; unsigned long flags; @@ -2368,6 +2369,7 @@ int xen_create_contiguous_region(unsigned long vstart, unsigned int order, spin_unlock_irqrestore(&xen_reservation_lock, flags); + *dma_handle = virt_to_machine(vstart).maddr; return success ? 0 : -ENOMEM; } EXPORT_SYMBOL_GPL(xen_create_contiguous_region); |