Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / exynos / exynos_drm_iommu.h

diff --git a/kernel/drivers/gpu/drm/exynos/exynos_drm_iommu.h b/kernel/drivers/gpu/drm/exynos/exynos_drm_iommu.h
new file mode 100644 (file)
index 0000000..35d2588
--- /dev/null
+++ b/kernel/drivers/gpu/drm/exynos/exynos_drm_iommu.h
@@ -0,0 +1,69 @@
+/* exynos_drm_iommu.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * Authoer: Inki Dae <inki.dae@samsung.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef _EXYNOS_DRM_IOMMU_H_
+#define _EXYNOS_DRM_IOMMU_H_
+
+#define EXYNOS_DEV_ADDR_START  0x20000000
+#define EXYNOS_DEV_ADDR_SIZE   0x40000000
+
+#ifdef CONFIG_DRM_EXYNOS_IOMMU
+
+int drm_create_iommu_mapping(struct drm_device *drm_dev);
+
+void drm_release_iommu_mapping(struct drm_device *drm_dev);
+
+int drm_iommu_attach_device(struct drm_device *drm_dev,
+                               struct device *subdrv_dev);
+
+void drm_iommu_detach_device(struct drm_device *dev_dev,
+                               struct device *subdrv_dev);
+
+static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
+{
+#ifdef CONFIG_ARM_DMA_USE_IOMMU
+       struct device *dev = drm_dev->dev;
+
+       return dev->archdata.mapping ? true : false;
+#else
+       return false;
+#endif
+}
+
+#else
+
+static inline int drm_create_iommu_mapping(struct drm_device *drm_dev)
+{
+       return 0;
+}
+
+static inline void drm_release_iommu_mapping(struct drm_device *drm_dev)
+{
+}
+
+static inline int drm_iommu_attach_device(struct drm_device *drm_dev,
+                                               struct device *subdrv_dev)
+{
+       return 0;
+}
+
+static inline void drm_iommu_detach_device(struct drm_device *drm_dev,
+                                               struct device *subdrv_dev)
+{
+}
+
+static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
+{
+       return false;
+}
+
+#endif
+#endif