summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-01-02 16:25:05 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-01-02 16:25:05 +0300
commit21bea26c848e056e58e01448db41fabd47168c73 (patch)
tree72fbed5c6cb9cf6372a573d63f260bce5ba92bfa /drivers
parent1760bfa7d7ca490cf8a61fe50ddeb1769cadd89e (diff)
parent04b99eac389adc6485f7913d83ec9ed68bbc8326 (diff)
downloadlinux-21bea26c848e056e58e01448db41fabd47168c73.tar.xz
Merge tag 'thunderbolt-for-v6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into char-misc-next
Mika writes: thunderbolt: Changes for v6.8 merge window This includes following USB4/Thunderbolt changes for the v6.8 merge window: - Intel Lunar Lake support - PCIe tunneling improvements - DisplayPort tunneling improvements - Asymmetric switching improvements - Couple of minor fixes and cleanups. All these have been in linux-next with no reported issues. * tag 'thunderbolt-for-v6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: thunderbolt: Reduce retry timeout to speed up boot for some devices thunderbolt: Keep link as asymmetric if preferred by hardware thunderbolt: Add support for Intel Lunar Lake thunderbolt: Disable PCIe extended encapsulation upon teardown properly thunderbolt: Make PCIe tunnel setup and teardown follow CM guide thunderbolt: Improve logging when DisplayPort resource is added due to hotplug thunderbolt: Use tb_dp_read_cap() to read DP_COMMON_CAP as well thunderbolt: Disable CL states only when actually needed thunderbolt: Transition link to asymmetric only when both sides support it thunderbolt: Log XDomain link speed and width thunderbolt: Move width_name() helper to tb.h thunderbolt: Handle lane bonding of Gen 4 XDomain links properly thunderbolt: Unwind TMU configuration if tb_switch_set_tmu_mode_params() fails thunderbolt: Remove duplicated re-assignment of pointer 'out'
Diffstat (limited to 'drivers')
-rw-r--r--drivers/thunderbolt/icm.c2
-rw-r--r--drivers/thunderbolt/nhi.c4
-rw-r--r--drivers/thunderbolt/nhi.h2
-rw-r--r--drivers/thunderbolt/switch.c33
-rw-r--r--drivers/thunderbolt/tb.c74
-rw-r--r--drivers/thunderbolt/tb.h18
-rw-r--r--drivers/thunderbolt/tmu.c2
-rw-r--r--drivers/thunderbolt/tunnel.c46
-rw-r--r--drivers/thunderbolt/xdomain.c54
9 files changed, 176 insertions, 59 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index d8b9c734abd3..56790d50f9e3 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -1020,7 +1020,7 @@ icm_tr_driver_ready(struct tb *tb, enum tb_security_level *security_level,
memset(&reply, 0, sizeof(reply));
ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply),
- 1, 10, 2000);
+ 1, 10, 250);
if (ret)
return ret;
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 4b7bec74e89f..fb4f46e51753 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -1517,6 +1517,10 @@ static struct pci_device_id nhi_ids[] = {
.driver_data = (kernel_ulong_t)&icl_nhi_ops },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MTL_P_NHI1),
.driver_data = (kernel_ulong_t)&icl_nhi_ops },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_LNL_NHI0),
+ .driver_data = (kernel_ulong_t)&icl_nhi_ops },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_LNL_NHI1),
+ .driver_data = (kernel_ulong_t)&icl_nhi_ops },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI) },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI) },
diff --git a/drivers/thunderbolt/nhi.h b/drivers/thunderbolt/nhi.h
index 0f029ce75882..7a07c7c1a9c2 100644
--- a/drivers/thunderbolt/nhi.h
+++ b/drivers/thunderbolt/nhi.h
@@ -90,6 +90,8 @@ extern const struct tb_nhi_ops icl_nhi_ops;
#define PCI_DEVICE_ID_INTEL_TGL_H_NHI1 0x9a21
#define PCI_DEVICE_ID_INTEL_RPL_NHI0 0xa73e
#define PCI_DEVICE_ID_INTEL_RPL_NHI1 0xa76d
+#define PCI_DEVICE_ID_INTEL_LNL_NHI0 0xa833
+#define PCI_DEVICE_ID_INTEL_LNL_NHI1 0xa834
#define PCI_CLASS_SERIAL_USB_USB4 0x0c0340
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 44e9b09de47a..900114ba4371 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -941,22 +941,6 @@ int tb_port_get_link_generation(struct tb_port *port)
}
}
-static const char *width_name(enum tb_link_width width)
-{
- switch (width) {
- case TB_LINK_WIDTH_SINGLE:
- return "symmetric, single lane";
- case TB_LINK_WIDTH_DUAL:
- return "symmetric, dual lanes";
- case TB_LINK_WIDTH_ASYM_TX:
- return "asymmetric, 3 transmitters, 1 receiver";
- case TB_LINK_WIDTH_ASYM_RX:
- return "asymmetric, 3 receivers, 1 transmitter";
- default:
- return "unknown";
- }
-}
-
/**
* tb_port_get_link_width() - Get current link width
* @port: Port to check (USB4 or CIO)
@@ -2769,7 +2753,7 @@ static void tb_switch_link_init(struct tb_switch *sw)
return;
tb_sw_dbg(sw, "current link speed %u.0 Gb/s\n", sw->link_speed);
- tb_sw_dbg(sw, "current link width %s\n", width_name(sw->link_width));
+ tb_sw_dbg(sw, "current link width %s\n", tb_width_name(sw->link_width));
bonded = sw->link_width >= TB_LINK_WIDTH_DUAL;
@@ -2789,6 +2773,19 @@ static void tb_switch_link_init(struct tb_switch *sw)
if (down->dual_link_port)
down->dual_link_port->bonded = bonded;
tb_port_update_credits(down);
+
+ if (tb_port_get_link_generation(up) < 4)
+ return;
+
+ /*
+ * Set the Gen 4 preferred link width. This is what the router
+ * prefers when the link is brought up. If the router does not
+ * support asymmetric link configuration, this also will be set
+ * to TB_LINK_WIDTH_DUAL.
+ */
+ sw->preferred_link_width = sw->link_width;
+ tb_sw_dbg(sw, "preferred link width %s\n",
+ tb_width_name(sw->preferred_link_width));
}
/**
@@ -3029,7 +3026,7 @@ int tb_switch_set_link_width(struct tb_switch *sw, enum tb_link_width width)
tb_switch_update_link_attributes(sw);
- tb_sw_dbg(sw, "link width set to %s\n", width_name(width));
+ tb_sw_dbg(sw, "link width set to %s\n", tb_width_name(width));
return ret;
}
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index fd49f86e0353..846d2813bb1a 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -513,8 +513,6 @@ static void tb_port_unconfigure_xdomain(struct tb_port *port)
usb4_port_unconfigure_xdomain(port);
else
tb_lc_unconfigure_xdomain(port);
-
- tb_port_enable(port->dual_link_port);
}
static void tb_scan_xdomain(struct tb_port *port)
@@ -1087,15 +1085,14 @@ static int tb_configure_asym(struct tb *tb, struct tb_port *src_port,
struct tb_port *dst_port, int requested_up,
int requested_down)
{
+ bool clx = false, clx_disabled = false, downstream;
struct tb_switch *sw;
- bool clx, downstream;
struct tb_port *up;
int ret = 0;
if (!asym_threshold)
return 0;
- /* Disable CL states before doing any transitions */
downstream = tb_port_path_direction_downstream(src_port, dst_port);
/* Pick up router deepest in the hierarchy */
if (downstream)
@@ -1103,11 +1100,10 @@ static int tb_configure_asym(struct tb *tb, struct tb_port *src_port,
else
sw = src_port->sw;
- clx = tb_disable_clx(sw);
-
tb_for_each_upstream_port_on_path(src_port, dst_port, up) {
+ struct tb_port *down = tb_switch_downstream_port(up->sw);
+ enum tb_link_width width_up, width_down;
int consumed_up, consumed_down;
- enum tb_link_width width;
ret = tb_consumed_dp_bandwidth(tb, src_port, dst_port, up,
&consumed_up, &consumed_down);
@@ -1128,7 +1124,8 @@ static int tb_configure_asym(struct tb *tb, struct tb_port *src_port,
if (consumed_down + requested_down < asym_threshold)
continue;
- width = TB_LINK_WIDTH_ASYM_RX;
+ width_up = TB_LINK_WIDTH_ASYM_RX;
+ width_down = TB_LINK_WIDTH_ASYM_TX;
} else {
/* Upstream, the opposite of above */
if (consumed_down + requested_down >= TB_ASYM_MIN) {
@@ -1138,22 +1135,34 @@ static int tb_configure_asym(struct tb *tb, struct tb_port *src_port,
if (consumed_up + requested_up < asym_threshold)
continue;
- width = TB_LINK_WIDTH_ASYM_TX;
+ width_up = TB_LINK_WIDTH_ASYM_TX;
+ width_down = TB_LINK_WIDTH_ASYM_RX;
}
- if (up->sw->link_width == width)
+ if (up->sw->link_width == width_up)
continue;
- if (!tb_port_width_supported(up, width))
+ if (!tb_port_width_supported(up, width_up) ||
+ !tb_port_width_supported(down, width_down))
continue;
+ /*
+ * Disable CL states before doing any transitions. We
+ * delayed it until now that we know there is a real
+ * transition taking place.
+ */
+ if (!clx_disabled) {
+ clx = tb_disable_clx(sw);
+ clx_disabled = true;
+ }
+
tb_sw_dbg(up->sw, "configuring asymmetric link\n");
/*
* Here requested + consumed > threshold so we need to
* transtion the link into asymmetric now.
*/
- ret = tb_switch_set_link_width(up->sw, width);
+ ret = tb_switch_set_link_width(up->sw, width_up);
if (ret) {
tb_sw_warn(up->sw, "failed to set link width\n");
break;
@@ -1174,24 +1183,24 @@ static int tb_configure_asym(struct tb *tb, struct tb_port *src_port,
* @dst_port: Destination adapter
* @requested_up: New lower bandwidth request upstream (Mb/s)
* @requested_down: New lower bandwidth request downstream (Mb/s)
+ * @keep_asym: Keep asymmetric link if preferred
*
* Goes over each link from @src_port to @dst_port and tries to
* transition the link to symmetric if the currently consumed bandwidth
- * allows.
+ * allows and link asymmetric preference is ignored (if @keep_asym is %false).
*/
static int tb_configure_sym(struct tb *tb, struct tb_port *src_port,
struct tb_port *dst_port, int requested_up,
- int requested_down)
+ int requested_down, bool keep_asym)
{
+ bool clx = false, clx_disabled = false, downstream;
struct tb_switch *sw;
- bool clx, downstream;
struct tb_port *up;
int ret = 0;
if (!asym_threshold)
return 0;
- /* Disable CL states before doing any transitions */
downstream = tb_port_path_direction_downstream(src_port, dst_port);
/* Pick up router deepest in the hierarchy */
if (downstream)
@@ -1199,8 +1208,6 @@ static int tb_configure_sym(struct tb *tb, struct tb_port *src_port,
else
sw = src_port->sw;
- clx = tb_disable_clx(sw);
-
tb_for_each_upstream_port_on_path(src_port, dst_port, up) {
int consumed_up, consumed_down;
@@ -1233,6 +1240,25 @@ static int tb_configure_sym(struct tb *tb, struct tb_port *src_port,
if (up->sw->link_width == TB_LINK_WIDTH_DUAL)
continue;
+ /*
+ * Here consumed < threshold so we can transition the
+ * link to symmetric.
+ *
+ * However, if the router prefers asymmetric link we
+ * honor that (unless @keep_asym is %false).
+ */
+ if (keep_asym &&
+ up->sw->preferred_link_width > TB_LINK_WIDTH_DUAL) {
+ tb_sw_dbg(up->sw, "keeping preferred asymmetric link\n");
+ continue;
+ }
+
+ /* Disable CL states before doing any transitions */
+ if (!clx_disabled) {
+ clx = tb_disable_clx(sw);
+ clx_disabled = true;
+ }
+
tb_sw_dbg(up->sw, "configuring symmetric link\n");
ret = tb_switch_set_link_width(up->sw, TB_LINK_WIDTH_DUAL);
@@ -1280,7 +1306,7 @@ static void tb_configure_link(struct tb_port *down, struct tb_port *up,
struct tb_port *host_port;
host_port = tb_port_at(tb_route(sw), tb->root_switch);
- tb_configure_sym(tb, host_port, up, 0, 0);
+ tb_configure_sym(tb, host_port, up, 0, 0, false);
}
/* Set the link configured */
@@ -1465,7 +1491,7 @@ static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel)
* If bandwidth on a link is < asym_threshold
* transition the link to symmetric.
*/
- tb_configure_sym(tb, src_port, dst_port, 0, 0);
+ tb_configure_sym(tb, src_port, dst_port, 0, 0, true);
/* Now we can allow the domain to runtime suspend again */
pm_runtime_mark_last_busy(&dst_port->sw->dev);
pm_runtime_put_autosuspend(&dst_port->sw->dev);
@@ -1901,7 +1927,7 @@ static void tb_dp_resource_available(struct tb *tb, struct tb_port *port)
return;
}
- tb_port_dbg(port, "DP %s resource available\n",
+ tb_port_dbg(port, "DP %s resource available after hotplug\n",
tb_port_is_dpin(port) ? "IN" : "OUT");
list_add_tail(&port->list, &tcm->dp_resources);
@@ -2287,7 +2313,7 @@ static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up,
* If bandwidth on a link is < asym_threshold transition
* the link to symmetric.
*/
- tb_configure_sym(tb, in, out, *requested_up, *requested_down);
+ tb_configure_sym(tb, in, out, *requested_up, *requested_down, true);
/*
* If requested bandwidth is less or equal than what is
* currently allocated to that tunnel we simply change
@@ -2330,7 +2356,7 @@ static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up,
ret = tb_configure_asym(tb, in, out, *requested_up,
*requested_down);
if (ret) {
- tb_configure_sym(tb, in, out, 0, 0);
+ tb_configure_sym(tb, in, out, 0, 0, true);
return ret;
}
@@ -2338,7 +2364,7 @@ static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up,
requested_down);
if (ret) {
tb_tunnel_warn(tunnel, "failed to allocate bandwidth\n");
- tb_configure_sym(tb, in, out, 0, 0);
+ tb_configure_sym(tb, in, out, 0, 0, true);
}
} else {
ret = -ENOBUFS;
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index e299e53473ae..997c5a536905 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -125,6 +125,7 @@ struct tb_switch_tmu {
* @device_name: Name of the device (or %NULL if not known)
* @link_speed: Speed of the link in Gb/s
* @link_width: Width of the upstream facing link
+ * @preferred_link_width: Router preferred link width (only set for Gen 4 links)
* @link_usb4: Upstream link is USB4
* @generation: Switch Thunderbolt generation
* @cap_plug_events: Offset to the plug events capability (%0 if not found)
@@ -178,6 +179,7 @@ struct tb_switch {
const char *device_name;
unsigned int link_speed;
enum tb_link_width link_width;
+ enum tb_link_width preferred_link_width;
bool link_usb4;
unsigned int generation;
int cap_plug_events;
@@ -568,6 +570,22 @@ static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
return &sw->ports[port];
}
+static inline const char *tb_width_name(enum tb_link_width width)
+{
+ switch (width) {
+ case TB_LINK_WIDTH_SINGLE:
+ return "symmetric, single lane";
+ case TB_LINK_WIDTH_DUAL:
+ return "symmetric, dual lanes";
+ case TB_LINK_WIDTH_ASYM_TX:
+ return "asymmetric, 3 transmitters, 1 receiver";
+ case TB_LINK_WIDTH_ASYM_RX:
+ return "asymmetric, 3 receivers, 1 transmitter";
+ default:
+ return "unknown";
+ }
+}
+
/**
* tb_port_has_remote() - Does the port have switch connected downstream
* @port: Port to check
diff --git a/drivers/thunderbolt/tmu.c b/drivers/thunderbolt/tmu.c
index 11f2aec2a5d3..9a259c72e5a7 100644
--- a/drivers/thunderbolt/tmu.c
+++ b/drivers/thunderbolt/tmu.c
@@ -894,7 +894,7 @@ static int tb_switch_tmu_change_mode(struct tb_switch *sw)
ret = tb_switch_set_tmu_mode_params(sw, sw->tmu.mode_request);
if (ret)
- return ret;
+ goto out;
/* Program the new mode and the downstream router lane adapter */
switch (sw->tmu.mode_request) {
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 7534cd3a81f4..6fffb2c82d3d 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -173,16 +173,28 @@ static int tb_pci_set_ext_encapsulation(struct tb_tunnel *tunnel, bool enable)
int ret;
/* Only supported of both routers are at least USB4 v2 */
- if (tb_port_get_link_generation(port) < 4)
+ if ((usb4_switch_version(tunnel->src_port->sw) < 2) ||
+ (usb4_switch_version(tunnel->dst_port->sw) < 2))
+ return 0;
+
+ if (enable && tb_port_get_link_generation(port) < 4)
return 0;
ret = usb4_pci_port_set_ext_encapsulation(tunnel->src_port, enable);
if (ret)
return ret;
+ /*
+ * Downstream router could be unplugged so disable of encapsulation
+ * in upstream router is still possible.
+ */
ret = usb4_pci_port_set_ext_encapsulation(tunnel->dst_port, enable);
- if (ret)
- return ret;
+ if (ret) {
+ if (enable)
+ return ret;
+ if (ret != -ENODEV)
+ return ret;
+ }
tb_tunnel_dbg(tunnel, "extended encapsulation %s\n",
str_enabled_disabled(enable));
@@ -199,14 +211,21 @@ static int tb_pci_activate(struct tb_tunnel *tunnel, bool activate)
return res;
}
- res = tb_pci_port_enable(tunnel->src_port, activate);
+ if (activate)
+ res = tb_pci_port_enable(tunnel->dst_port, activate);
+ else
+ res = tb_pci_port_enable(tunnel->src_port, activate);
if (res)
return res;
- if (tb_port_is_pcie_up(tunnel->dst_port)) {
- res = tb_pci_port_enable(tunnel->dst_port, activate);
+
+ if (activate) {
+ res = tb_pci_port_enable(tunnel->src_port, activate);
if (res)
return res;
+ } else {
+ /* Downstream router could be unplugged */
+ tb_pci_port_enable(tunnel->dst_port, activate);
}
return activate ? 0 : tb_pci_set_ext_encapsulation(tunnel, activate);
@@ -1067,8 +1086,7 @@ static int tb_dp_alloc_bandwidth(struct tb_tunnel *tunnel, int *alloc_up,
return 0;
}
-static int tb_dp_read_dprx(struct tb_tunnel *tunnel, u32 *rate, u32 *lanes,
- int timeout_msec)
+static int tb_dp_wait_dprx(struct tb_tunnel *tunnel, int timeout_msec)
{
ktime_t timeout = ktime_add_ms(ktime_get(), timeout_msec);
struct tb_port *in = tunnel->src_port;
@@ -1087,15 +1105,13 @@ static int tb_dp_read_dprx(struct tb_tunnel *tunnel, u32 *rate, u32 *lanes,
return ret;
if (val & DP_COMMON_CAP_DPRX_DONE) {
- *rate = tb_dp_cap_get_rate(val);
- *lanes = tb_dp_cap_get_lanes(val);
-
tb_tunnel_dbg(tunnel, "DPRX read done\n");
return 0;
}
usleep_range(100, 150);
} while (ktime_before(ktime_get(), timeout));
+ tb_tunnel_dbg(tunnel, "DPRX read timeout\n");
return -ETIMEDOUT;
}
@@ -1110,6 +1126,7 @@ static int tb_dp_read_cap(struct tb_tunnel *tunnel, unsigned int cap, u32 *rate,
switch (cap) {
case DP_LOCAL_CAP:
case DP_REMOTE_CAP:
+ case DP_COMMON_CAP:
break;
default:
@@ -1182,7 +1199,7 @@ static int tb_dp_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up,
* reduced one). Otherwise return the remote (possibly
* reduced) caps.
*/
- ret = tb_dp_read_dprx(tunnel, &rate, &lanes, 150);
+ ret = tb_dp_wait_dprx(tunnel, 150);
if (ret) {
if (ret == -ETIMEDOUT)
ret = tb_dp_read_cap(tunnel, DP_REMOTE_CAP,
@@ -1190,6 +1207,9 @@ static int tb_dp_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up,
if (ret)
return ret;
}
+ ret = tb_dp_read_cap(tunnel, DP_COMMON_CAP, &rate, &lanes);
+ if (ret)
+ return ret;
} else if (sw->generation >= 2) {
ret = tb_dp_read_cap(tunnel, DP_REMOTE_CAP, &rate, &lanes);
if (ret)
@@ -1313,8 +1333,6 @@ static void tb_dp_dump(struct tb_tunnel *tunnel)
"DP IN maximum supported bandwidth %u Mb/s x%u = %u Mb/s\n",
rate, lanes, tb_dp_bandwidth(rate, lanes));
- out = tunnel->dst_port;
-
if (tb_port_read(out, &dp_cap, TB_CFG_PORT,
out->cap_adap + DP_LOCAL_CAP, 1))
return;
diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c
index 9803f0bbf20d..9495742913d5 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()