drm/xe: Only alloc userptr part of xe_vma for userptrs

Only alloc userptr part of xe_vma for userptrs, this will save on space
in the common BO case.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_vm.c

@@ -880,14 +880,17 @@ static struct xe_vma *xe_vma_create(struct xe_vm *vm,
 	XE_BUG_ON(start >= end);
 	XE_BUG_ON(end >= vm->size);
 
-	vma = kzalloc(sizeof(*vma), GFP_KERNEL);
+	if (!bo && !is_null)	/* userptr */
+		vma = kzalloc(sizeof(*vma), GFP_KERNEL);
+	else
+		vma = kzalloc(sizeof(*vma) - sizeof(struct xe_userptr),
+			      GFP_KERNEL);
 	if (!vma) {
 		vma = ERR_PTR(-ENOMEM);
 		return vma;
 	}
 
 	INIT_LIST_HEAD(&vma->combined_links.rebind);
-	INIT_LIST_HEAD(&vma->userptr.invalidate_link);
 	INIT_LIST_HEAD(&vma->notifier.rebind_link);
 	INIT_LIST_HEAD(&vma->extobj.link);
 
@@ -931,6 +934,7 @@ static struct xe_vma *xe_vma_create(struct xe_vm *vm,
 			u64 size = end - start + 1;
 			int err;
 
+			INIT_LIST_HEAD(&vma->userptr.invalidate_link);
 			vma->gpuva.gem.offset = bo_offset_or_userptr;
 
 			err = mmu_interval_notifier_insert(&vma->userptr.notifier,

drivers/gpu/drm/xe/xe_vm_types.h

@@ -34,6 +34,31 @@ struct xe_vm;
 #define XE_VMA_PTE_2M		(DRM_GPUVA_USERBITS << 6)
 #define XE_VMA_PTE_1G		(DRM_GPUVA_USERBITS << 7)
 
+/** struct xe_userptr - User pointer */
+struct xe_userptr {
+	/** @invalidate_link: Link for the vm::userptr.invalidated list */
+	struct list_head invalidate_link;
+	/**
+	 * @notifier: MMU notifier for user pointer (invalidation call back)
+	 */
+	struct mmu_interval_notifier notifier;
+	/** @sgt: storage for a scatter gather table */
+	struct sg_table sgt;
+	/** @sg: allocated scatter gather table */
+	struct sg_table *sg;
+	/** @notifier_seq: notifier sequence number */
+	unsigned long notifier_seq;
+	/**
+	 * @initial_bind: user pointer has been bound at least once.
+	 * write: vm->userptr.notifier_lock in read mode and vm->resv held.
+	 * read: vm->userptr.notifier_lock in write mode or vm->resv held.
+	 */
+	bool initial_bind;
+#if IS_ENABLED(CONFIG_DRM_XE_USERPTR_INVAL_INJECT)
+	u32 divisor;
+#endif
+};
+
 struct xe_vma {
 	/** @gpuva: Base GPUVA object */
 	struct drm_gpuva gpuva;
@@ -68,31 +93,6 @@ struct xe_vma {
 		struct work_struct destroy_work;
 	};
 
-	/** @userptr: user pointer state */
-	struct {
-		/** @invalidate_link: Link for the vm::userptr.invalidated list */
-		struct list_head invalidate_link;
-		/**
-		 * @notifier: MMU notifier for user pointer (invalidation call back)
-		 */
-		struct mmu_interval_notifier notifier;
-		/** @sgt: storage for a scatter gather table */
-		struct sg_table sgt;
-		/** @sg: allocated scatter gather table */
-		struct sg_table *sg;
-		/** @notifier_seq: notifier sequence number */
-		unsigned long notifier_seq;
-		/**
-		 * @initial_bind: user pointer has been bound at least once.
-		 * write: vm->userptr.notifier_lock in read mode and vm->resv held.
-		 * read: vm->userptr.notifier_lock in write mode or vm->resv held.
-		 */
-		bool initial_bind;
-#if IS_ENABLED(CONFIG_DRM_XE_USERPTR_INVAL_INJECT)
-		u32 divisor;
-#endif
-	} userptr;
-
 	/** @usm: unified shared memory state */
 	struct {
 		/** @tile_invalidated: VMA has been invalidated */
@@ -122,6 +122,12 @@ struct xe_vma {
 		 */
 		struct list_head link;
 	} extobj;
+
+	/**
+	 * @userptr: user pointer state, only allocated for VMAs that are
+	 * user pointers
+	 */
+	struct xe_userptr userptr;
 };
 
 struct xe_device;