This is useful when walking over upstream lane adapters over given path.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/thunderbolt/tb.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 6d49510eea09..869ac360e1b5 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -1073,6 +1073,21 @@ static inline bool tb_port_use_credit_allocation(const struct tb_port *port)
for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \
(p) = tb_next_port_on_path((src), (dst), (p)))
+/**
+ * tb_for_each_upstream_port_on_path() - Iterate over each upstreamm port on path
+ * @src: Source port
+ * @dst: Destination port
+ * @p: Port used as iterator
+ *
+ * Walks over each upstream lane adapter on path from @src to @dst.
+ */
+#define tb_for_each_upstream_port_on_path(src, dst, p) \
+ for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \
+ (p) = tb_next_port_on_path((src), (dst), (p))) \
+ if (!tb_port_is_null((p)) || !tb_is_upstream_port((p))) {\
+ continue; \
+ } else
+
int tb_port_get_link_speed(struct tb_port *port);
int tb_port_get_link_generation(struct tb_port *port);
int tb_port_get_link_width(struct tb_port *port);
--
2.40.1
