Both ends of the link needs to have this set. Otherwise the link is not
re-established properly after sleep. Now since it is possible to have
mixed USB4 and Thunderbolt 1, 2 and 3 devices we need to split the link
configuration functionality to happen per port so we can pick the
correct implementation.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/thunderbolt/lc.c | 48 +++++--------------
drivers/thunderbolt/switch.c | 33 ++++++++++---
drivers/thunderbolt/tb.h | 8 ++--
drivers/thunderbolt/usb4.c | 92 +++++++++++++++++-------------------
4 files changed, 87 insertions(+), 94 deletions(-)
diff --git a/drivers/thunderbolt/lc.c b/drivers/thunderbolt/lc.c
index b2f62ba0421d..5c209a570360 100644
--- a/drivers/thunderbolt/lc.c
+++ b/drivers/thunderbolt/lc.c
@@ -45,7 +45,7 @@ static int find_port_lc_cap(struct tb_port *port)
return sw->cap_lc + start + phys * size;
}
-static int tb_lc_configure_lane(struct tb_port *port, bool configure)
+static int tb_lc_set_port_configured(struct tb_port *port, bool configured)
{
bool upstream = tb_is_upstream_port(port);
struct tb_switch *sw = port->sw;
@@ -69,7 +69,7 @@ static int tb_lc_configure_lane(struct tb_port *port, bool configure)
else
lane = TB_LC_SX_CTRL_L2C;
- if (configure) {
+ if (configured) {
ctrl |= lane;
if (upstream)
ctrl |= TB_LC_SX_CTRL_UPSTREAM;
@@ -83,49 +83,25 @@ static int tb_lc_configure_lane(struct tb_port *port, bool configure)
}
/**
- * tb_lc_configure_link() - Let LC know about configured link
- * @sw: Switch that is being added
+ * tb_lc_configure_port() - Let LC know about configured port
+ * @port: Port that is set as configured
*
- * Informs LC of both parent switch and @sw that there is established
- * link between the two.
+ * Sets the port configured for power management purposes.
*/
-int tb_lc_configure_link(struct tb_switch *sw)
+int tb_lc_configure_port(struct tb_port *port)
{
- struct tb_port *up, *down;
- int ret;
-
- up = tb_upstream_port(sw);
- down = tb_port_at(tb_route(sw), tb_to_switch(sw->dev.parent));
-
- /* Configure parent link toward this switch */
- ret = tb_lc_configure_lane(down, true);
- if (ret)
- return ret;
-
- /* Configure upstream link from this switch to the parent */
- ret = tb_lc_configure_lane(up, true);
- if (ret)
- tb_lc_configure_lane(down, false);
-
- return ret;
+ return tb_lc_set_port_configured(port, true);
}
/**
- * tb_lc_unconfigure_link() - Let LC know about unconfigured link
- * @sw: Switch to unconfigure
+ * tb_lc_unconfigure_port() - Let LC know about unconfigured port
+ * @port: Port that is set as configured
*
- * Informs LC of both parent switch and @sw that the link between the
- * two does not exist anymore.
+ * Sets the port unconfigured for power management purposes.
*/
-void tb_lc_unconfigure_link(struct tb_switch *sw)
+void tb_lc_unconfigure_port(struct tb_port *port)
{
- struct tb_port *up, *down;
-
- up = tb_upstream_port(sw);
- down = tb_port_at(tb_route(sw), tb_to_switch(sw->dev.parent));
-
- tb_lc_configure_lane(up, false);
- tb_lc_configure_lane(down, false);
+ tb_lc_set_port_configured(port, false);
}
/**
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index ecc47ea81bb6..1c45f8baf487 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2321,12 +2321,24 @@ void tb_switch_lane_bonding_disable(struct tb_switch *sw)
*/
int tb_switch_configure_link(struct tb_switch *sw)
{
+ struct tb_port *up, *down;
+ int ret;
+
if (!tb_route(sw) || tb_switch_is_icm(sw))
return 0;
- if (tb_switch_is_usb4(sw))
- return usb4_switch_configure_link(sw);
- return tb_lc_configure_link(sw);
+ up = tb_upstream_port(sw);
+ if (tb_switch_is_usb4(up->sw))
+ ret = usb4_port_configure(up);
+ else
+ ret = tb_lc_configure_port(up);
+ if (ret)
+ return ret;
+
+ down = up->remote;
+ if (tb_switch_is_usb4(down->sw))
+ return usb4_port_configure(down);
+ return tb_lc_configure_port(down);
}
/**
@@ -2338,15 +2350,24 @@ int tb_switch_configure_link(struct tb_switch *sw)
*/
void tb_switch_unconfigure_link(struct tb_switch *sw)
{
+ struct tb_port *up, *down;
+
if (sw->is_unplugged)
return;
if (!tb_route(sw) || tb_switch_is_icm(sw))
return;
- if (tb_switch_is_usb4(sw))
- usb4_switch_unconfigure_link(sw);
+ up = tb_upstream_port(sw);
+ if (tb_switch_is_usb4(up->sw))
+ usb4_port_unconfigure(up);
+ else
+ tb_lc_unconfigure_port(up);
+
+ down = up->remote;
+ if (tb_switch_is_usb4(down->sw))
+ usb4_port_unconfigure(down);
else
- tb_lc_unconfigure_link(sw);
+ tb_lc_unconfigure_port(down);
}
/**
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index dcdc886412f5..082ae9da4cbc 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -846,8 +846,8 @@ int tb_drom_read(struct tb_switch *sw);
int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid);
-int tb_lc_configure_link(struct tb_switch *sw);
-void tb_lc_unconfigure_link(struct tb_switch *sw);
+int tb_lc_configure_port(struct tb_port *port);
+void tb_lc_unconfigure_port(struct tb_port *port);
int tb_lc_set_sleep(struct tb_switch *sw);
bool tb_lc_lane_bonding_possible(struct tb_switch *sw);
bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in);
@@ -902,8 +902,6 @@ int usb4_switch_setup(struct tb_switch *sw);
int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid);
int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
size_t size);
-int usb4_switch_configure_link(struct tb_switch *sw);
-void usb4_switch_unconfigure_link(struct tb_switch *sw);
bool usb4_switch_lane_bonding_possible(struct tb_switch *sw);
int usb4_switch_set_sleep(struct tb_switch *sw);
int usb4_switch_nvm_sector_size(struct tb_switch *sw);
@@ -921,6 +919,8 @@ struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
const struct tb_port *port);
int usb4_port_unlock(struct tb_port *port);
+int usb4_port_configure(struct tb_port *port);
+void usb4_port_unconfigure(struct tb_port *port);
int usb4_port_enumerate_retimers(struct tb_port *port);
int usb4_port_retimer_read(struct tb_port *port, u8 index, u8 reg, void *buf,
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index dd601a6db23c..b2677427789f 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -338,54 +338,6 @@ int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
usb4_switch_drom_read_block, sw);
}
-static int usb4_set_port_configured(struct tb_port *port, bool configured)
-{
- int ret;
- u32 val;
-
- ret = tb_port_read(port, &val, TB_CFG_PORT,
- port->cap_usb4 + PORT_CS_19, 1);
- if (ret)
- return ret;
-
- if (configured)
- val |= PORT_CS_19_PC;
- else
- val &= ~PORT_CS_19_PC;
-
- return tb_port_write(port, &val, TB_CFG_PORT,
- port->cap_usb4 + PORT_CS_19, 1);
-}
-
-/**
- * usb4_switch_configure_link() - Set upstream USB4 link configured
- * @sw: USB4 router
- *
- * Sets the upstream USB4 link to be configured for power management
- * purposes.
- */
-int usb4_switch_configure_link(struct tb_switch *sw)
-{
- struct tb_port *up;
-
- up = tb_upstream_port(sw);
- return usb4_set_port_configured(up, true);
-}
-
-/**
- * usb4_switch_unconfigure_link() - Un-set upstream USB4 link configuration
- * @sw: USB4 router
- *
- * Reverse of usb4_switch_configure_link().
- */
-void usb4_switch_unconfigure_link(struct tb_switch *sw)
-{
- struct tb_port *up;
-
- up = tb_upstream_port(sw);
- usb4_set_port_configured(up, false);
-}
-
/**
* usb4_switch_lane_bonding_possible() - Are conditions met for lane bonding
* @sw: USB4 router
@@ -789,6 +741,50 @@ int usb4_port_unlock(struct tb_port *port)
return tb_port_write(port, &val, TB_CFG_PORT, ADP_CS_4, 1);
}
+static int usb4_port_set_configured(struct tb_port *port, bool configured)
+{
+ int ret;
+ u32 val;
+
+ if (!port->cap_usb4)
+ return -EINVAL;
+
+ ret = tb_port_read(port, &val, TB_CFG_PORT,
+ port->cap_usb4 + PORT_CS_19, 1);
+ if (ret)
+ return ret;
+
+ if (configured)
+ val |= PORT_CS_19_PC;
+ else
+ val &= ~PORT_CS_19_PC;
+
+ return tb_port_write(port, &val, TB_CFG_PORT,
+ port->cap_usb4 + PORT_CS_19, 1);
+}
+
+/**
+ * usb4_port_configure() - Set USB4 port configured
+ * @port: USB4 router
+ *
+ * Sets the USB4 link to be configured for power management purposes.
+ */
+int usb4_port_configure(struct tb_port *port)
+{
+ return usb4_port_set_configured(port, true);
+}
+
+/**
+ * usb4_port_unconfigure() - Set USB4 port unconfigured
+ * @port: USB4 router
+ *
+ * Sets the USB4 link to be unconfigured for power management purposes.
+ */
+void usb4_port_unconfigure(struct tb_port *port)
+{
+ usb4_port_set_configured(port, false);
+}
+
static int usb4_port_wait_for_bit(struct tb_port *port, u32 offset, u32 bit,
u32 value, int timeout_msec)
{
--
2.28.0
