[Xen-devel] [RFC 2/2] swiotlb-xen: implement xen_swiotlb_get_sgtable callback

[Andrii Anisov <andrii.anisov@xxxxxxxxx>]

From: Andrii Anisov <andrii_anisov@xxxxxxxx>

Signed-off-by: Andrii Anisov <andrii_anisov@xxxxxxxx>
---
 arch/arm/xen/mm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index 050cf34..4061dd0 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -176,6 +176,16 @@ static int xen_swiotlb_dma_mmap(struct device *dev, struct 
vm_area_struct *vma,
        return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
 }
 
+static int xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
+                                void *cpu_addr, dma_addr_t handle, size_t size,
+                                struct dma_attrs *attrs)
+{
+       if (__generic_dma_ops(dev)->get_sgtable)
+               return __generic_dma_ops(dev)->get_sgtable(dev, sgt, cpu_addr, 
handle,
+                                                                size, attrs);
+       return dma_common_get_sgtable(dev, sgt, cpu_addr, handle, size);
+}
+
 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
                                 unsigned int address_bits,
                                 dma_addr_t *dma_handle)
@@ -213,6 +223,7 @@ static struct dma_map_ops xen_swiotlb_dma_ops = {
        .dma_supported = xen_swiotlb_dma_supported,
        .set_dma_mask = xen_swiotlb_set_dma_mask,
        .mmap = xen_swiotlb_dma_mmap,
+       .get_sgtable = xen_swiotlb_get_sgtable,
 };
 
 int __init xen_mm_init(void)
-- 
2.7.4


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