drm/nouveau: move usercopy helpers to nouveau_drv.h

Move the usercopy helpers to a common driver header file to make it
usable for the new API added in subsequent commits.
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804182406.5222-7-dakr@redhat.com

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -130,6 +130,32 @@ nouveau_cli(struct drm_file *fpriv)
 	return fpriv ? fpriv->driver_priv : NULL;
 }
 
+static inline void
+u_free(void *addr)
+{
+	kvfree(addr);
+}
+
+static inline void *
+u_memcpya(uint64_t user, unsigned int nmemb, unsigned int size)
+{
+	void *mem;
+	void __user *userptr = (void __force __user *)(uintptr_t)user;
+
+	size *= nmemb;
+
+	mem = kvmalloc(size, GFP_KERNEL);
+	if (!mem)
+		return ERR_PTR(-ENOMEM);
+
+	if (copy_from_user(mem, userptr, size)) {
+		u_free(mem);
+		return ERR_PTR(-EFAULT);
+	}
+
+	return mem;
+}
+
 #include <nvif/object.h>
 #include <nvif/parent.h>
 

drivers/gpu/drm/nouveau/nouveau_gem.c

@@ -613,32 +613,6 @@ nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 	return 0;
 }
 
-static inline void
-u_free(void *addr)
-{
-	kvfree(addr);
-}
-
-static inline void *
-u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
-{
-	void *mem;
-	void __user *userptr = (void __force __user *)(uintptr_t)user;
-
-	size *= nmemb;
-
-	mem = kvmalloc(size, GFP_KERNEL);
-	if (!mem)
-		return ERR_PTR(-ENOMEM);
-
-	if (copy_from_user(mem, userptr, size)) {
-		u_free(mem);
-		return ERR_PTR(-EFAULT);
-	}
-
-	return mem;
-}
-
 static int
 nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
 				struct drm_nouveau_gem_pushbuf *req,