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authorOleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>2022-06-02 22:23:46 +0300
committerJuergen Gross <jgross@suse.com>2022-06-06 08:54:33 +0200
commit9bf22421dc8a69cade3c994771637e9693ff0216 (patch)
tree7a2f56b1d0e68ffaf3dc7715eef2c23dfe6c8942 /include
parent3f9dfbebdc48cebfbda738f6f3d1dbf6d7232f90 (diff)
arm/xen: Introduce xen_setup_dma_ops()
This patch introduces new helper and places it in new header. The helper's purpose is to assign any Xen specific DMA ops in a single place. For now, we deal with xen-swiotlb DMA ops only. The one of the subsequent commits in current series will add xen-grant DMA ops case. Also re-use the xen_swiotlb_detect() check on Arm32. Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> [For arm64] Acked-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/1654197833-25362-2-git-send-email-olekstysh@gmail.com Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include')
-rw-r--r--include/xen/arm/xen-ops.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/xen/arm/xen-ops.h b/include/xen/arm/xen-ops.h
new file mode 100644
index 000000000000..288deb1c3ac9
--- /dev/null
+++ b/include/xen/arm/xen-ops.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARM_XEN_OPS_H
+#define _ASM_ARM_XEN_OPS_H
+
+#include <xen/swiotlb-xen.h>
+
+static inline void xen_setup_dma_ops(struct device *dev)
+{
+#ifdef CONFIG_XEN
+ if (xen_swiotlb_detect())
+ dev->dma_ops = &xen_swiotlb_dma_ops;
+#endif
+}
+
+#endif /* _ASM_ARM_XEN_OPS_H */