1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h
new file mode 100644
index 000000000000..e059590e5076
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_svm.h
@@ -0,0 +1,150 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef _XE_SVM_H_
+#define _XE_SVM_H_
+
+#include <drm/drm_pagemap.h>
+#include <drm/drm_gpusvm.h>
+
+#define XE_INTERCONNECT_VRAM DRM_INTERCONNECT_DRIVER
+
+struct xe_bo;
+struct xe_vram_region;
+struct xe_tile;
+struct xe_vm;
+struct xe_vma;
+
+/** struct xe_svm_range - SVM range */
+struct xe_svm_range {
+	/** @base: base drm_gpusvm_range */
+	struct drm_gpusvm_range base;
+	/**
+	 * @garbage_collector_link: Link into VM's garbage collect SVM range
+	 * list. Protected by VM's garbage collect lock.
+	 */
+	struct list_head garbage_collector_link;
+	/**
+	 * @tile_present: Tile mask of binding is present for this range.
+	 * Protected by GPU SVM notifier lock.
+	 */
+	u8 tile_present;
+	/**
+	 * @tile_invalidated: Tile mask of binding is invalidated for this
+	 * range. Protected by GPU SVM notifier lock.
+	 */
+	u8 tile_invalidated;
+	/**
+	 * @skip_migrate: Skip migration to VRAM, protected by GPU fault handler
+	 * locking.
+	 */
+	u8 skip_migrate	:1;
+};
+
+#if IS_ENABLED(CONFIG_DRM_GPUSVM)
+/**
+ * xe_svm_range_pages_valid() - SVM range pages valid
+ * @range: SVM range
+ *
+ * Return: True if SVM range pages are valid, False otherwise
+ */
+static inline bool xe_svm_range_pages_valid(struct xe_svm_range *range)
+{
+	return drm_gpusvm_range_pages_valid(range->base.gpusvm, &range->base);
+}
+
+int xe_devm_add(struct xe_tile *tile, struct xe_vram_region *vr);
+
+int xe_svm_init(struct xe_vm *vm);
+
+void xe_svm_fini(struct xe_vm *vm);
+
+void xe_svm_close(struct xe_vm *vm);
+
+int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma,
+			    struct xe_tile *tile, u64 fault_addr,
+			    bool atomic);
+
+bool xe_svm_has_mapping(struct xe_vm *vm, u64 start, u64 end);
+
+int xe_svm_bo_evict(struct xe_bo *bo);
+
+void xe_svm_range_debug(struct xe_svm_range *range, const char *operation);
+#else
+static inline bool xe_svm_range_pages_valid(struct xe_svm_range *range)
+{
+	return false;
+}
+
+static inline
+int xe_devm_add(struct xe_tile *tile, struct xe_vram_region *vr)
+{
+	return 0;
+}
+
+static inline
+int xe_svm_init(struct xe_vm *vm)
+{
+	return 0;
+}
+
+static inline
+void xe_svm_fini(struct xe_vm *vm)
+{
+}
+
+static inline
+void xe_svm_close(struct xe_vm *vm)
+{
+}
+
+static inline
+int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma,
+			    struct xe_tile *tile, u64 fault_addr,
+			    bool atomic)
+{
+	return 0;
+}
+
+static inline
+bool xe_svm_has_mapping(struct xe_vm *vm, u64 start, u64 end)
+{
+	return false;
+}
+
+static inline
+int xe_svm_bo_evict(struct xe_bo *bo)
+{
+	return 0;
+}
+
+static inline
+void xe_svm_range_debug(struct xe_svm_range *range, const char *operation)
+{
+}
+#endif
+
+/**
+ * xe_svm_range_has_dma_mapping() - SVM range has DMA mapping
+ * @range: SVM range
+ *
+ * Return: True if SVM range has a DMA mapping, False otherwise
+ */
+static inline bool xe_svm_range_has_dma_mapping(struct xe_svm_range *range)
+{
+	lockdep_assert_held(&range->base.gpusvm->notifier_lock);
+	return range->base.flags.has_dma_mapping;
+}
+
+#define xe_svm_assert_in_notifier(vm__) \
+	lockdep_assert_held_write(&(vm__)->svm.gpusvm.notifier_lock)
+
+#define xe_svm_notifier_lock(vm__)	\
+	drm_gpusvm_notifier_lock(&(vm__)->svm.gpusvm)
+
+#define xe_svm_notifier_unlock(vm__)	\
+	drm_gpusvm_notifier_unlock(&(vm__)->svm.gpusvm)
+
+#endif