1 files changed, 321 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..da9a69ea0bb1
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_svm.h
@@ -0,0 +1,321 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef _XE_SVM_H_
+#define _XE_SVM_H_
+
+#if IS_ENABLED(CONFIG_DRM_XE_GPUSVM)
+
+#include <drm/drm_pagemap.h>
+#include <drm/drm_gpusvm.h>
+
+#define XE_INTERCONNECT_VRAM DRM_INTERCONNECT_DRIVER
+
+struct xe_bo;
+struct xe_gt;
+struct xe_tile;
+struct xe_vm;
+struct xe_vma;
+struct xe_vram_region;
+
+/** 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;
+};
+
+/**
+ * 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_gt *gt, 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);
+
+int xe_svm_alloc_vram(struct xe_tile *tile, struct xe_svm_range *range,
+		      const struct drm_gpusvm_ctx *ctx);
+
+struct xe_svm_range *xe_svm_range_find_or_insert(struct xe_vm *vm, u64 addr,
+						 struct xe_vma *vma, struct drm_gpusvm_ctx *ctx);
+
+int xe_svm_range_get_pages(struct xe_vm *vm, struct xe_svm_range *range,
+			   struct drm_gpusvm_ctx *ctx);
+
+bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range, struct xe_vma *vma,
+					bool preferred_region_is_vram);
+
+void xe_svm_range_migrate_to_smem(struct xe_vm *vm, struct xe_svm_range *range);
+
+bool xe_svm_range_validate(struct xe_vm *vm,
+			   struct xe_svm_range *range,
+			   u8 tile_mask, bool devmem_preferred);
+
+u64 xe_svm_find_vma_start(struct xe_vm *vm, u64 addr, u64 end,  struct xe_vma *vma);
+
+/**
+ * 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;
+}
+
+/**
+ * to_xe_range - Convert a drm_gpusvm_range pointer to a xe_svm_range
+ * @r: Pointer to the drm_gpusvm_range structure
+ *
+ * This function takes a pointer to a drm_gpusvm_range structure and
+ * converts it to a pointer to the containing xe_svm_range structure.
+ *
+ * Return: Pointer to the xe_svm_range structure
+ */
+static inline struct xe_svm_range *to_xe_range(struct drm_gpusvm_range *r)
+{
+	return container_of(r, struct xe_svm_range, base);
+}
+
+/**
+ * xe_svm_range_start() - SVM range start address
+ * @range: SVM range
+ *
+ * Return: start address of range.
+ */
+static inline unsigned long xe_svm_range_start(struct xe_svm_range *range)
+{
+	return drm_gpusvm_range_start(&range->base);
+}
+
+/**
+ * xe_svm_range_end() - SVM range end address
+ * @range: SVM range
+ *
+ * Return: end address of range.
+ */
+static inline unsigned long xe_svm_range_end(struct xe_svm_range *range)
+{
+	return drm_gpusvm_range_end(&range->base);
+}
+
+/**
+ * xe_svm_range_size() - SVM range size
+ * @range: SVM range
+ *
+ * Return: Size of range.
+ */
+static inline unsigned long xe_svm_range_size(struct xe_svm_range *range)
+{
+	return drm_gpusvm_range_size(&range->base);
+}
+
+#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)
+
+void xe_svm_flush(struct xe_vm *vm);
+
+#else
+#include <linux/interval_tree.h>
+
+struct drm_pagemap_device_addr;
+struct drm_gpusvm_ctx;
+struct drm_gpusvm_range;
+struct xe_bo;
+struct xe_gt;
+struct xe_vm;
+struct xe_vma;
+struct xe_tile;
+struct xe_vram_region;
+
+#define XE_INTERCONNECT_VRAM 1
+
+struct xe_svm_range {
+	struct {
+		struct interval_tree_node itree;
+		const struct drm_pagemap_device_addr *dma_addr;
+	} base;
+	u32 tile_present;
+	u32 tile_invalidated;
+};
+
+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_gt *gt, 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)
+{
+}
+
+static inline int
+xe_svm_alloc_vram(struct xe_tile *tile, struct xe_svm_range *range,
+		  const struct drm_gpusvm_ctx *ctx)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline
+struct xe_svm_range *xe_svm_range_find_or_insert(struct xe_vm *vm, u64 addr,
+						 struct xe_vma *vma, struct drm_gpusvm_ctx *ctx)
+{
+	return ERR_PTR(-EINVAL);
+}
+
+static inline
+int xe_svm_range_get_pages(struct xe_vm *vm, struct xe_svm_range *range,
+			   struct drm_gpusvm_ctx *ctx)
+{
+	return -EINVAL;
+}
+
+static inline struct xe_svm_range *to_xe_range(struct drm_gpusvm_range *r)
+{
+	return NULL;
+}
+
+static inline unsigned long xe_svm_range_start(struct xe_svm_range *range)
+{
+	return 0;
+}
+
+static inline unsigned long xe_svm_range_end(struct xe_svm_range *range)
+{
+	return 0;
+}
+
+static inline unsigned long xe_svm_range_size(struct xe_svm_range *range)
+{
+	return 0;
+}
+
+static inline
+bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range, struct xe_vma *vma,
+					u32 region)
+{
+	return false;
+}
+
+static inline
+void xe_svm_range_migrate_to_smem(struct xe_vm *vm, struct xe_svm_range *range)
+{
+}
+
+static inline
+bool xe_svm_range_validate(struct xe_vm *vm,
+			   struct xe_svm_range *range,
+			   u8 tile_mask, bool devmem_preferred)
+{
+	return false;
+}
+
+static inline
+u64 xe_svm_find_vma_start(struct xe_vm *vm, u64 addr, u64 end, struct xe_vma *vma)
+{
+	return ULONG_MAX;
+}
+
+#define xe_svm_assert_in_notifier(...) do {} while (0)
+#define xe_svm_range_has_dma_mapping(...) false
+
+static inline void xe_svm_notifier_lock(struct xe_vm *vm)
+{
+}
+
+static inline void xe_svm_notifier_unlock(struct xe_vm *vm)
+{
+}
+
+static inline void xe_svm_flush(struct xe_vm *vm)
+{
+}
+#endif
+#endif