x86: move dma_map_sg to common header
the old i386 implementation is moved to pci-base_32.c
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/pci-base_32.c b/arch/x86/kernel/pci-base_32.c
index a8a7c7f..2474152 100644
--- a/arch/x86/kernel/pci-base_32.c
+++ b/arch/x86/kernel/pci-base_32.c
@@ -12,9 +12,28 @@
return virt_to_phys(ptr);
}
+static int pci32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, int direction)
+{
+ struct scatterlist *sg;
+ int i;
+
+ WARN_ON(nents == 0 || sglist[0].length == 0);
+
+ for_each_sg(sglist, sg, nents, i) {
+ BUG_ON(!sg_page(sg));
+
+ sg->dma_address = sg_phys(sg);
+ }
+
+ flush_write_buffers();
+ return nents;
+}
+
static const struct dma_mapping_ops pci32_dma_ops = {
.map_single = pci32_map_single,
.unmap_single = NULL,
+ .map_sg = pci32_dma_map_sg,
};
const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;