diff options
| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-09 16:56:33 +0000 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-09 16:56:33 +0000 |
| commit | eb1ddc00b81cb8cb23891b6c7c5fbfaea29f3c73 (patch) | |
| tree | 19cef10472e84e085d51068fdff191749c829a78 | |
| parent | 83862ccfc0a03212fde43b4ac29c28381828768b (diff) | |
| download | lwn-eb1ddc00b81cb8cb23891b6c7c5fbfaea29f3c73.tar.gz lwn-eb1ddc00b81cb8cb23891b6c7c5fbfaea29f3c73.zip | |
swiotlb-xen: introduce xen_swiotlb_set_dma_mask
Implement xen_swiotlb_set_dma_mask, use it for set_dma_mask on arm.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| -rw-r--r-- | arch/arm/xen/mm.c | 1 | ||||
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 12 | ||||
| -rw-r--r-- | include/xen/swiotlb-xen.h | 2 |
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index d56b8c6e4fbb..0d69b874d249 100644 --- a/arch/arm/xen/mm.c +++ b/arch/arm/xen/mm.c @@ -51,6 +51,7 @@ static struct dma_map_ops xen_swiotlb_dma_ops = { .map_page = xen_swiotlb_map_page, .unmap_page = xen_swiotlb_unmap_page, .dma_supported = xen_swiotlb_dma_supported, + .set_dma_mask = xen_swiotlb_set_dma_mask, }; int __init xen_mm_init(void) diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index f0fc1a4f565a..d8ef0bf577d2 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -608,3 +608,15 @@ xen_swiotlb_dma_supported(struct device *hwdev, u64 mask) return xen_virt_to_bus(xen_io_tlb_end - 1) <= mask; } EXPORT_SYMBOL_GPL(xen_swiotlb_dma_supported); + +int +xen_swiotlb_set_dma_mask(struct device *dev, u64 dma_mask) +{ + if (!dev->dma_mask || !xen_swiotlb_dma_supported(dev, dma_mask)) + return -EIO; + + *dev->dma_mask = dma_mask; + + return 0; +} +EXPORT_SYMBOL_GPL(xen_swiotlb_set_dma_mask); diff --git a/include/xen/swiotlb-xen.h b/include/xen/swiotlb-xen.h index de8bcc641c49..7b644650d968 100644 --- a/include/xen/swiotlb-xen.h +++ b/include/xen/swiotlb-xen.h @@ -55,4 +55,6 @@ xen_swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); extern int xen_swiotlb_dma_supported(struct device *hwdev, u64 mask); +extern int +xen_swiotlb_set_dma_mask(struct device *dev, u64 dma_mask); #endif /* __LINUX_SWIOTLB_XEN_H */ |