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thunderbolt: Introduce tb_for_each_upstream_port_on_path()

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[ Upstream commit 956c3abe72 ]

This is useful when walking over upstream lane adapters over given path.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Qin Wan <qin.wan@hp.com>
Signed-off-by: Alexandru Gagniuc <alexandru.gagniuc@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2024-10-01 17:31:05 +00:00 committed by Greg Kroah-Hartman
parent 18dcdadc99
commit e07bc5858e
1 changed files with 15 additions and 0 deletions
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15
drivers/thunderbolt/tb.h
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@ -1076,6 +1076,21 @@ 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);