[PATCH 23/23] drm/xe/svm: Add svm memory hints interface

[Oak Zeng]

Signed-off-by: Oak Zeng <oak.zeng at intel.com>
---
 include/uapi/drm/xe_drm.h | 40 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
index 50bbea0992d9..551ed8706097 100644
--- a/include/uapi/drm/xe_drm.h
+++ b/include/uapi/drm/xe_drm.h
@@ -80,6 +80,7 @@ extern "C" {
  *  - &DRM_IOCTL_XE_EXEC_QUEUE_GET_PROPERTY
  *  - &DRM_IOCTL_XE_EXEC
  *  - &DRM_IOCTL_XE_WAIT_USER_FENCE
+ *  - &DRM_IOCTL_XE_SVM
  */
 
 /*
@@ -100,6 +101,7 @@ extern "C" {
 #define DRM_XE_EXEC_QUEUE_GET_PROPERTY	0x08
 #define DRM_XE_EXEC			0x09
 #define DRM_XE_WAIT_USER_FENCE		0x0a
+#define DRM_XE_SVM			0x0b
 /* Must be kept compact -- no holes */
 
 #define DRM_IOCTL_XE_DEVICE_QUERY		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_DEVICE_QUERY, struct drm_xe_device_query)
@@ -113,6 +115,7 @@ extern "C" {
 #define DRM_IOCTL_XE_EXEC_QUEUE_GET_PROPERTY	DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_EXEC_QUEUE_GET_PROPERTY, struct drm_xe_exec_queue_get_property)
 #define DRM_IOCTL_XE_EXEC			DRM_IOW(DRM_COMMAND_BASE + DRM_XE_EXEC, struct drm_xe_exec)
 #define DRM_IOCTL_XE_WAIT_USER_FENCE		DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_WAIT_USER_FENCE, struct drm_xe_wait_user_fence)
+#define DRM_IOCTL_XE_SVM			DRM_IOWR(DRM_COMMAND_BASE + DRM_XE_SVM, struct drm_xe_svm_args)
 
 /**
  * DOC: Xe IOCTL Extensions
@@ -1339,6 +1342,43 @@ struct drm_xe_wait_user_fence {
 	__u64 reserved[2];
 };
 
+enum drm_xe_svm_attr_type {
+	DRM_XE_SVM_ATTR_PREFERRED_LOC,
+	DRM_XE_SVM_ATTR_MIGRATION_GRANULARITY,
+	DRM_XE_SVM_ATTR_ATOMIC,
+	DRM_XE_SVM_ATTR_CACHE,
+	DRM_XE_SVM_ATTR_PREFETCH_LOC,
+	DRM_XE_SVM_ATTR_ACCESS_PATTERN,
+};
+
+struct drm_xe_svm_attr {
+	__u32 type;
+	__u32 value;
+};
+
+enum drm_xe_svm_op {
+	DRM_XE_SVM_OP_SET_ATTR,
+	DRM_XE_SVM_OP_GET_ATTR,
+};
+
+/**
+ * struct drm_xe_svm_args - Input of &DRM_IOCTL_XE_SVM
+ *
+ * Set or get memory attributes to a virtual address range
+ */
+struct drm_xe_svm_args {
+	/** @start: start of the virtual address range */
+	__u64 start;
+	/** @size: size of the virtual address range */
+	__u64 size;
+	/** @op: operation, either set or get */
+	__u32 op;
+	/** @nattr: number of attributes */
+	__u32 nattr;
+	/** @attrs: An array of attributes */
+	struct drm_xe_svm_attr attrs[];
+};
+
 #if defined(__cplusplus)
 }
 #endif
-- 
2.26.3