Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / asm-generic / scatterlist.h

diff --git a/kernel/include/asm-generic/scatterlist.h b/kernel/include/asm-generic/scatterlist.h
new file mode 100644 (file)
index 0000000..5de0735
--- /dev/null
+++ b/kernel/include/asm-generic/scatterlist.h
@@ -0,0 +1,34 @@
+#ifndef __ASM_GENERIC_SCATTERLIST_H
+#define __ASM_GENERIC_SCATTERLIST_H
+
+#include <linux/types.h>
+
+struct scatterlist {
+#ifdef CONFIG_DEBUG_SG
+       unsigned long   sg_magic;
+#endif
+       unsigned long   page_link;
+       unsigned int    offset;
+       unsigned int    length;
+       dma_addr_t      dma_address;
+#ifdef CONFIG_NEED_SG_DMA_LENGTH
+       unsigned int    dma_length;
+#endif
+};
+
+/*
+ * These macros should be used after a dma_map_sg call has been done
+ * to get bus addresses of each of the SG entries and their lengths.
+ * You should only work with the number of sg entries pci_map_sg
+ * returns, or alternatively stop on the first sg_dma_len(sg) which
+ * is 0.
+ */
+#define sg_dma_address(sg)     ((sg)->dma_address)
+
+#ifdef CONFIG_NEED_SG_DMA_LENGTH
+#define sg_dma_len(sg)         ((sg)->dma_length)
+#else
+#define sg_dma_len(sg)         ((sg)->length)
+#endif
+
+#endif /* __ASM_GENERIC_SCATTERLIST_H */