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-rw-r--r--drivers/thunderbolt/icm.c33
-rw-r--r--drivers/thunderbolt/switch.c21
-rw-r--r--drivers/thunderbolt/tb.c30
-rw-r--r--drivers/thunderbolt/tb.h36
-rw-r--r--drivers/thunderbolt/xdomain.c5
5 files changed, 73 insertions, 52 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index bec360eef6cf..805958e53c58 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -1761,16 +1761,10 @@ static void icm_unplug_children(struct tb_switch *sw)
for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
- if (tb_is_upstream_port(port))
- continue;
- if (port->xdomain) {
+ if (port->xdomain)
port->xdomain->is_unplugged = true;
- continue;
- }
- if (!port->remote)
- continue;
-
- icm_unplug_children(port->remote->sw);
+ else if (tb_port_has_remote(port))
+ icm_unplug_children(port->remote->sw);
}
}
@@ -1781,23 +1775,16 @@ static void icm_free_unplugged_children(struct tb_switch *sw)
for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
- if (tb_is_upstream_port(port))
- continue;
-
if (port->xdomain && port->xdomain->is_unplugged) {
tb_xdomain_remove(port->xdomain);
port->xdomain = NULL;
- continue;
- }
-
- if (!port->remote)
- continue;
-
- if (port->remote->sw->is_unplugged) {
- tb_switch_remove(port->remote->sw);
- port->remote = NULL;
- } else {
- icm_free_unplugged_children(port->remote->sw);
+ } else if (tb_port_has_remote(port)) {
+ if (port->remote->sw->is_unplugged) {
+ tb_switch_remove(port->remote->sw);
+ port->remote = NULL;
+ } else {
+ icm_free_unplugged_children(port->remote->sw);
+ }
}
}
}
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 30f3d6a9fe90..6f98b3d6eb2a 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1580,14 +1580,13 @@ void tb_switch_remove(struct tb_switch *sw)
/* port 0 is the switch itself and never has a remote */
for (i = 1; i <= sw->config.max_port_number; i++) {
- if (tb_is_upstream_port(&sw->ports[i]))
- continue;
- if (sw->ports[i].remote)
+ if (tb_port_has_remote(&sw->ports[i])) {
tb_switch_remove(sw->ports[i].remote->sw);
- sw->ports[i].remote = NULL;
- if (sw->ports[i].xdomain)
+ sw->ports[i].remote = NULL;
+ } else if (sw->ports[i].xdomain) {
tb_xdomain_remove(sw->ports[i].xdomain);
- sw->ports[i].xdomain = NULL;
+ sw->ports[i].xdomain = NULL;
+ }
}
if (!sw->is_unplugged)
@@ -1617,7 +1616,7 @@ void tb_sw_set_unplugged(struct tb_switch *sw)
}
sw->is_unplugged = true;
for (i = 0; i <= sw->config.max_port_number; i++) {
- if (!tb_is_upstream_port(&sw->ports[i]) && sw->ports[i].remote)
+ if (tb_port_has_remote(&sw->ports[i]))
tb_sw_set_unplugged(sw->ports[i].remote->sw);
}
}
@@ -1663,10 +1662,10 @@ int tb_switch_resume(struct tb_switch *sw)
/* check for surviving downstream switches */
for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
- if (tb_is_upstream_port(port))
- continue;
- if (!port->remote)
+
+ if (!tb_port_has_remote(port))
continue;
+
if (tb_wait_for_port(port, true) <= 0
|| tb_switch_resume(port->remote->sw)) {
tb_port_warn(port,
@@ -1685,7 +1684,7 @@ void tb_switch_suspend(struct tb_switch *sw)
return;
for (i = 1; i <= sw->config.max_port_number; i++) {
- if (!tb_is_upstream_port(&sw->ports[i]) && sw->ports[i].remote)
+ if (tb_port_has_remote(&sw->ports[i]))
tb_switch_suspend(sw->ports[i].remote->sw);
}
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 36dad0a00ac2..0485f4ef9a62 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -47,7 +47,9 @@ static void tb_scan_switch(struct tb_switch *sw)
*/
static void tb_scan_port(struct tb_port *port)
{
+ struct tb_port *upstream_port;
struct tb_switch *sw;
+
if (tb_is_upstream_port(port))
return;
if (port->config.type != TB_TYPE_PORT)
@@ -80,8 +82,15 @@ static void tb_scan_port(struct tb_port *port)
return;
}
- port->remote = tb_upstream_port(sw);
- tb_upstream_port(sw)->remote = port;
+ /* Link the switches using both links if available */
+ upstream_port = tb_upstream_port(sw);
+ port->remote = upstream_port;
+ upstream_port->remote = port;
+ if (port->dual_link_port && upstream_port->dual_link_port) {
+ port->dual_link_port->remote = upstream_port->dual_link_port;
+ upstream_port->dual_link_port->remote = port->dual_link_port;
+ }
+
tb_scan_switch(sw);
}
@@ -111,13 +120,15 @@ static void tb_free_unplugged_children(struct tb_switch *sw)
int i;
for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
- if (tb_is_upstream_port(port))
- continue;
- if (!port->remote)
+
+ if (!tb_port_has_remote(port))
continue;
+
if (port->remote->sw->is_unplugged) {
tb_switch_remove(port->remote->sw);
port->remote = NULL;
+ if (port->dual_link_port)
+ port->dual_link_port->remote = NULL;
} else {
tb_free_unplugged_children(port->remote->sw);
}
@@ -273,18 +284,19 @@ static void tb_handle_hotplug(struct work_struct *work)
}
port = &sw->ports[ev->port];
if (tb_is_upstream_port(port)) {
- tb_warn(tb,
- "hotplug event for upstream port %llx:%x (unplug: %d)\n",
- ev->route, ev->port, ev->unplug);
+ tb_dbg(tb, "hotplug event for upstream port %llx:%x (unplug: %d)\n",
+ ev->route, ev->port, ev->unplug);
goto put_sw;
}
if (ev->unplug) {
- if (port->remote) {
+ if (tb_port_has_remote(port)) {
tb_port_info(port, "unplugged\n");
tb_sw_set_unplugged(port->remote->sw);
tb_free_invalid_tunnels(tb);
tb_switch_remove(port->remote->sw);
port->remote = NULL;
+ if (port->dual_link_port)
+ port->dual_link_port->remote = NULL;
} else {
tb_port_info(port,
"got unplug event for disconnected port, ignoring\n");
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 1cb5009195f9..43bc4f490021 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -270,6 +270,19 @@ static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
return &sw->ports[sw->config.upstream_port_number];
}
+/**
+ * tb_is_upstream_port() - Is the port upstream facing
+ * @port: Port to check
+ *
+ * Returns true if @port is upstream facing port. In case of dual link
+ * ports both return true.
+ */
+static inline bool tb_is_upstream_port(const struct tb_port *port)
+{
+ const struct tb_port *upstream_port = tb_upstream_port(port->sw);
+ return port == upstream_port || port->dual_link_port == upstream_port;
+}
+
static inline u64 tb_route(struct tb_switch *sw)
{
return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
@@ -285,6 +298,24 @@ static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
return &sw->ports[port];
}
+/**
+ * tb_port_has_remote() - Does the port have switch connected downstream
+ * @port: Port to check
+ *
+ * Returns true only when the port is primary port and has remote set.
+ */
+static inline bool tb_port_has_remote(const struct tb_port *port)
+{
+ if (tb_is_upstream_port(port))
+ return false;
+ if (!port->remote)
+ return false;
+ if (port->dual_link_port && port->link_nr)
+ return false;
+
+ return true;
+}
+
static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
enum tb_cfg_space space, u32 offset, u32 length)
{
@@ -489,11 +520,6 @@ static inline int tb_route_length(u64 route)
return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
}
-static inline bool tb_is_upstream_port(struct tb_port *port)
-{
- return port == tb_upstream_port(port->sw);
-}
-
/**
* tb_downstream_route() - get route to downstream switch
*
diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c
index e2fc4543142d..7bae92bc486f 100644
--- a/drivers/thunderbolt/xdomain.c
+++ b/drivers/thunderbolt/xdomain.c
@@ -1293,9 +1293,6 @@ static struct tb_xdomain *switch_find_xdomain(struct tb_switch *sw,
struct tb_port *port = &sw->ports[i];
struct tb_xdomain *xd;
- if (tb_is_upstream_port(port))
- continue;
-
if (port->xdomain) {
xd = port->xdomain;
@@ -1310,7 +1307,7 @@ static struct tb_xdomain *switch_find_xdomain(struct tb_switch *sw,
lookup->route == xd->route) {
return xd;
}
- } else if (port->remote) {
+ } else if (tb_port_has_remote(port)) {
xd = switch_find_xdomain(port->remote->sw, lookup);
if (xd)
return xd;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.