diff options
Diffstat (limited to 'drivers/thunderbolt/xdomain.c')
| -rw-r--r-- | drivers/thunderbolt/xdomain.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c index 9803f0bbf2..9495742913 100644 --- a/drivers/thunderbolt/xdomain.c +++ b/drivers/thunderbolt/xdomain.c @@ -1462,6 +1462,11 @@ static int tb_xdomain_get_properties(struct tb_xdomain *xd) tb_port_disable(port->dual_link_port); } + dev_dbg(&xd->dev, "current link speed %u.0 Gb/s\n", + xd->link_speed); + dev_dbg(&xd->dev, "current link width %s\n", + tb_width_name(xd->link_width)); + if (device_add(&xd->dev)) { dev_err(&xd->dev, "failed to add XDomain device\n"); return -ENODEV; @@ -1895,6 +1900,50 @@ struct device_type tb_xdomain_type = { }; EXPORT_SYMBOL_GPL(tb_xdomain_type); +static void tb_xdomain_link_init(struct tb_xdomain *xd, struct tb_port *down) +{ + if (!down->dual_link_port) + return; + + /* + * Gen 4 links come up already as bonded so only update the port + * structures here. + */ + if (tb_port_get_link_generation(down) >= 4) { + down->bonded = true; + down->dual_link_port->bonded = true; + } else { + xd->bonding_possible = true; + } +} + +static void tb_xdomain_link_exit(struct tb_xdomain *xd) +{ + struct tb_port *down = tb_xdomain_downstream_port(xd); + + if (!down->dual_link_port) + return; + + if (tb_port_get_link_generation(down) >= 4) { + down->bonded = false; + down->dual_link_port->bonded = false; + } else if (xd->link_width > TB_LINK_WIDTH_SINGLE) { + /* + * Just return port structures back to way they were and + * update credits. No need to update userspace because + * the XDomain is removed soon anyway. + */ + tb_port_lane_bonding_disable(down); + tb_port_update_credits(down); + } else if (down->dual_link_port) { + /* + * Re-enable the lane 1 adapter we disabled at the end + * of tb_xdomain_get_properties(). + */ + tb_port_enable(down->dual_link_port); + } +} + /** * tb_xdomain_alloc() - Allocate new XDomain object * @tb: Domain where the XDomain belongs @@ -1945,7 +1994,8 @@ struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent, goto err_free_local_uuid; } else { xd->needs_uuid = true; - xd->bonding_possible = !!down->dual_link_port; + + tb_xdomain_link_init(xd, down); } device_initialize(&xd->dev); @@ -2014,6 +2064,8 @@ void tb_xdomain_remove(struct tb_xdomain *xd) device_for_each_child_reverse(&xd->dev, xd, unregister_service); + tb_xdomain_link_exit(xd); + /* * Undo runtime PM here explicitly because it is possible that * the XDomain was never added to the bus and thus device_del() |