diff --git a/drivers/thunderbolt/path.c b/drivers/thunderbolt/path.c
index 854ff3412161..03e7b714deab 100644
--- a/drivers/thunderbolt/path.c
+++ b/drivers/thunderbolt/path.c
@@ -570,21 +570,20 @@ bool tb_path_is_invalid(struct tb_path *path)
 }
 
 /**
- * tb_path_switch_on_path() - Does the path go through certain switch
+ * tb_path_port_on_path() - Does the path go through certain port
  * @path: Path to check
- * @sw: Switch to check
+ * @port: Switch to check
  *
- * Goes over all hops on path and checks if @sw is any of them.
+ * Goes over all hops on path and checks if @port is any of them.
  * Direction does not matter.
  */
-bool tb_path_switch_on_path(const struct tb_path *path,
-			    const struct tb_switch *sw)
+bool tb_path_port_on_path(const struct tb_path *path, const struct tb_port *port)
 {
 	int i;
 
 	for (i = 0; i < path->path_length; i++) {
-		if (path->hops[i].in_port->sw == sw ||
-		    path->hops[i].out_port->sw == sw)
+		if (path->hops[i].in_port == port ||
+		    path->hops[i].out_port == port)
 			return true;
 	}
 
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 53f9673c1395..bbcf0f25617c 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -216,9 +216,187 @@ static struct tb_port *tb_find_usb3_down(struct tb_switch *sw,
 	return NULL;
 }
 
+static struct tb_tunnel *tb_find_tunnel(struct tb *tb, enum tb_tunnel_type type,
+					struct tb_port *src_port,
+					struct tb_port *dst_port)
+{
+	struct tb_cm *tcm = tb_priv(tb);
+	struct tb_tunnel *tunnel;
+
+	list_for_each_entry(tunnel, &tcm->tunnel_list, list) {
+		if (tunnel->type == type &&
+		    ((src_port && src_port == tunnel->src_port) ||
+		     (dst_port && dst_port == tunnel->dst_port))) {
+			return tunnel;
+		}
+	}
+
+	return NULL;
+}
+
+static struct tb_tunnel *tb_find_first_usb3_tunnel(struct tb *tb,
+						   struct tb_port *src_port,
+						   struct tb_port *dst_port)
+{
+	struct tb_port *port, *usb3_down;
+	struct tb_switch *sw;
+
+	/* Pick the router that is deepest in the topology */
+	if (dst_port->sw->config.depth > src_port->sw->config.depth)
+		sw = dst_port->sw;
+	else
+		sw = src_port->sw;
+
+	/* Can't be the host router */
+	if (sw == tb->root_switch)
+		return NULL;
+
+	/* Find the downstream USB4 port that leads to this router */
+	port = tb_port_at(tb_route(sw), tb->root_switch);
+	/* Find the corresponding host router USB3 downstream port */
+	usb3_down = usb4_switch_map_usb3_down(tb->root_switch, port);
+	if (!usb3_down)
+		return NULL;
+
+	return tb_find_tunnel(tb, TB_TUNNEL_USB3, usb3_down, NULL);
+}
+
+static int tb_available_bandwidth(struct tb *tb, struct tb_port *src_port,
+	struct tb_port *dst_port, int *available_up, int *available_down)
+{
+	int usb3_consumed_up, usb3_consumed_down, ret;
+	struct tb_cm *tcm = tb_priv(tb);
+	struct tb_tunnel *tunnel;
+	struct tb_port *port;
+
+	tb_port_dbg(dst_port, "calculating available bandwidth\n");
+
+	tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port);
+	if (tunnel) {
+		ret = tb_tunnel_consumed_bandwidth(tunnel, &usb3_consumed_up,
+						   &usb3_consumed_down);
+		if (ret)
+			return ret;
+	} else {
+		usb3_consumed_up = 0;
+		usb3_consumed_down = 0;
+	}
+
+	*available_up = *available_down = 40000;
+
+	/* Find the minimum available bandwidth over all links */
+	tb_for_each_port_on_path(src_port, dst_port, port) {
+		int link_speed, link_width, up_bw, down_bw;
+
+		if (!tb_port_is_null(port))
+			continue;
+
+		if (tb_is_upstream_port(port)) {
+			link_speed = port->sw->link_speed;
+		} else {
+			link_speed = tb_port_get_link_speed(port);
+			if (link_speed < 0)
+				return link_speed;
+		}
+
+		link_width = port->bonded ? 2 : 1;
+
+		up_bw = link_speed * link_width * 1000; /* Mb/s */
+		/* Leave 10% guard band */
+		up_bw -= up_bw / 10;
+		down_bw = up_bw;
+
+		tb_port_dbg(port, "link total bandwidth %d Mb/s\n", up_bw);
+
+		/*
+		 * Find all DP tunnels that cross the port and reduce
+		 * their consumed bandwidth from the available.
+		 */
+		list_for_each_entry(tunnel, &tcm->tunnel_list, list) {
+			int dp_consumed_up, dp_consumed_down;
+
+			if (!tb_tunnel_is_dp(tunnel))
+				continue;
+
+			if (!tb_tunnel_port_on_path(tunnel, port))
+				continue;
+
+			ret = tb_tunnel_consumed_bandwidth(tunnel,
+							   &dp_consumed_up,
+							   &dp_consumed_down);
+			if (ret)
+				return ret;
+
+			up_bw -= dp_consumed_up;
+			down_bw -= dp_consumed_down;
+		}
+
+		/*
+		 * If USB3 is tunneled from the host router down to the
+		 * branch leading to port we need to take USB3 consumed
+		 * bandwidth into account regardless whether it actually
+		 * crosses the port.
+		 */
+		up_bw -= usb3_consumed_up;
+		down_bw -= usb3_consumed_down;
+
+		if (up_bw < *available_up)
+			*available_up = up_bw;
+		if (down_bw < *available_down)
+			*available_down = down_bw;
+	}
+
+	if (*available_up < 0)
+		*available_up = 0;
+	if (*available_down < 0)
+		*available_down = 0;
+
+	return 0;
+}
+
+static int tb_release_unused_usb3_bandwidth(struct tb *tb,
+					    struct tb_port *src_port,
+					    struct tb_port *dst_port)
+{
+	struct tb_tunnel *tunnel;
+
+	tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port);
+	return tunnel ? tb_tunnel_release_unused_bandwidth(tunnel) : 0;
+}
+
+static void tb_reclaim_usb3_bandwidth(struct tb *tb, struct tb_port *src_port,
+				      struct tb_port *dst_port)
+{
+	int ret, available_up, available_down;
+	struct tb_tunnel *tunnel;
+
+	tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port);
+	if (!tunnel)
+		return;
+
+	tb_dbg(tb, "reclaiming unused bandwidth for USB3\n");
+
+	/*
+	 * Calculate available bandwidth for the first hop USB3 tunnel.
+	 * That determines the whole USB3 bandwidth for this branch.
+	 */
+	ret = tb_available_bandwidth(tb, tunnel->src_port, tunnel->dst_port,
+				     &available_up, &available_down);
+	if (ret) {
+		tb_warn(tb, "failed to calculate available bandwidth\n");
+		return;
+	}
+
+	tb_dbg(tb, "available bandwidth for USB3 %d/%d Mb/s\n",
+	       available_up, available_down);
+
+	tb_tunnel_reclaim_available_bandwidth(tunnel, &available_up, &available_down);
+}
+
 static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw)
 {
 	struct tb_switch *parent = tb_switch_parent(sw);
+	int ret, available_up, available_down;
 	struct tb_port *up, *down, *port;
 	struct tb_cm *tcm = tb_priv(tb);
 	struct tb_tunnel *tunnel;
@@ -249,21 +427,48 @@ static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw)
 		parent_up = tb_switch_find_port(parent, TB_TYPE_USB3_UP);
 		if (!parent_up || !tb_port_is_enabled(parent_up))
 			return 0;
+
+		/* Make all unused bandwidth available for the new tunnel */
+		ret = tb_release_unused_usb3_bandwidth(tb, down, up);
+		if (ret)
+			return ret;
 	}
 
-	tunnel = tb_tunnel_alloc_usb3(tb, up, down);
-	if (!tunnel)
-		return -ENOMEM;
+	ret = tb_available_bandwidth(tb, down, up, &available_up,
+				     &available_down);
+	if (ret)
+		goto err_reclaim;
+
+	tb_port_dbg(up, "available bandwidth for new USB3 tunnel %d/%d Mb/s\n",
+		    available_up, available_down);
+
+	tunnel = tb_tunnel_alloc_usb3(tb, up, down, available_up,
+				      available_down);
+	if (!tunnel) {
+		ret = -ENOMEM;
+		goto err_reclaim;
+	}
 
 	if (tb_tunnel_activate(tunnel)) {
 		tb_port_info(up,
 			     "USB3 tunnel activation failed, aborting\n");
-		tb_tunnel_free(tunnel);
-		return -EIO;
+		ret = -EIO;
+		goto err_free;
 	}
 
 	list_add_tail(&tunnel->list, &tcm->tunnel_list);
+	if (tb_route(parent))
+		tb_reclaim_usb3_bandwidth(tb, down, up);
+
 	return 0;
+
+err_free:
+	tb_tunnel_free(tunnel);
+err_reclaim:
+	if (tb_route(parent))
+		tb_reclaim_usb3_bandwidth(tb, down, up);
+
+	return ret;
 }
 
 static int tb_create_usb3_tunnels(struct tb_switch *sw)
@@ -403,40 +608,40 @@ static void tb_scan_port(struct tb_port *port)
 	tb_scan_switch(sw);
 }
 
-static struct tb_tunnel *tb_find_tunnel(struct tb *tb, enum tb_tunnel_type type,
-					struct tb_port *src_port,
-					struct tb_port *dst_port)
-{
-	struct tb_cm *tcm = tb_priv(tb);
-	struct tb_tunnel *tunnel;
-
-	list_for_each_entry(tunnel, &tcm->tunnel_list, list) {
-		if (tunnel->type == type &&
-		    ((src_port && src_port == tunnel->src_port) ||
-		     (dst_port && dst_port == tunnel->dst_port))) {
-			return tunnel;
-		}
-	}
-
-	return NULL;
-}
-
 static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel)
 {
+	struct tb_port *src_port, *dst_port;
+	struct tb *tb;
+
 	if (!tunnel)
 		return;
 
 	tb_tunnel_deactivate(tunnel);
 	list_del(&tunnel->list);
 
-	/*
-	 * In case of DP tunnel make sure the DP IN resource is deallocated
-	 * properly.
-	 */
-	if (tb_tunnel_is_dp(tunnel)) {
-		struct tb_port *in = tunnel->src_port;
+	tb = tunnel->tb;
+	src_port = tunnel->src_port;
+	dst_port = tunnel->dst_port;
 
-		tb_switch_dealloc_dp_resource(in->sw, in);
+	switch (tunnel->type) {
+	case TB_TUNNEL_DP:
+		/*
+		 * In case of DP tunnel make sure the DP IN resource is
+		 * deallocated properly.
+		 */
+		tb_switch_dealloc_dp_resource(src_port->sw, src_port);
+		fallthrough;
+
+	case TB_TUNNEL_USB3:
+		tb_reclaim_usb3_bandwidth(tb, src_port, dst_port);
+		break;
+
+	default:
+		/*
+		 * PCIe and DMA tunnels do not consume guaranteed
+		 * bandwidth.
+		 */
+		break;
 	}
 
 	tb_tunnel_free(tunnel);
@@ -530,46 +735,6 @@ out:
 	return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN);
 }
 
-static int tb_available_bw(struct tb_cm *tcm, struct tb_port *in,
-			   struct tb_port *out)
-{
-	struct tb_switch *sw = out->sw;
-	struct tb_tunnel *tunnel;
-	int ret, bw, available_bw = 40000;
-
-	while (sw && sw != in->sw) {
-		bw = sw->link_speed * sw->link_width * 1000; /* Mb/s */
-		/* Leave 10% guard band */
-		bw -= bw / 10;
-
-		/*
-		 * Check for any active DP tunnels that go through this
-		 * switch and reduce their consumed bandwidth from
-		 * available.
-		 */
-		list_for_each_entry(tunnel, &tcm->tunnel_list, list) {
-			int consumed_bw;
-
-			if (!tb_tunnel_switch_on_path(tunnel, sw))
-				continue;
-
-			ret = tb_tunnel_consumed_bandwidth(tunnel, NULL,
-							   &consumed_bw);
-			if (ret)
-				return ret;
-
-			bw -= consumed_bw;
-		}
-
-		if (bw < available_bw)
-			available_bw = bw;
-
-		sw = tb_switch_parent(sw);
-	}
-
-	return available_bw;
-}
-
 static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in)
 {
 	struct tb_port *host_port, *port;
@@ -609,10 +774,10 @@ static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in)
 
 static void tb_tunnel_dp(struct tb *tb)
 {
+	int available_up, available_down, ret;
 	struct tb_cm *tcm = tb_priv(tb);
 	struct tb_port *port, *in, *out;
 	struct tb_tunnel *tunnel;
-	int available_bw;
 
 	/*
 	 * Find pair of inactive DP IN and DP OUT adapters and then
@@ -654,32 +819,41 @@ static void tb_tunnel_dp(struct tb *tb)
 		return;
 	}
 
-	/* Calculate available bandwidth between in and out */
-	available_bw = tb_available_bw(tcm, in, out);
-	if (available_bw < 0) {
-		tb_warn(tb, "failed to determine available bandwidth\n");
-		return;
+	/* Make all unused USB3 bandwidth available for the new DP tunnel */
+	ret = tb_release_unused_usb3_bandwidth(tb, in, out);
+	if (ret) {
+		tb_warn(tb, "failed to release unused bandwidth\n");
+		goto err_dealloc_dp;
 	}
 
-	tb_dbg(tb, "available bandwidth for new DP tunnel %u Mb/s\n",
-	       available_bw);
+	ret = tb_available_bandwidth(tb, in, out, &available_up,
+				     &available_down);
+	if (ret)
+		goto err_reclaim;
 
-	tunnel = tb_tunnel_alloc_dp(tb, in, out, available_bw);
+	tb_dbg(tb, "available bandwidth for new DP tunnel %u/%u Mb/s\n",
+	       available_up, available_down);
+
+	tunnel = tb_tunnel_alloc_dp(tb, in, out, available_up, available_down);
 	if (!tunnel) {
 		tb_port_dbg(out, "could not allocate DP tunnel\n");
-		goto dealloc_dp;
+		goto err_reclaim;
 	}
 
 	if (tb_tunnel_activate(tunnel)) {
 		tb_port_info(out, "DP tunnel activation failed, aborting\n");
-		tb_tunnel_free(tunnel);
-		goto dealloc_dp;
+		goto err_free;
 	}
 
 	list_add_tail(&tunnel->list, &tcm->tunnel_list);
+	tb_reclaim_usb3_bandwidth(tb, in, out);
 	return;
 
-dealloc_dp:
+err_free:
+	tb_tunnel_free(tunnel);
+err_reclaim:
+	tb_reclaim_usb3_bandwidth(tb, in, out);
+err_dealloc_dp:
 	tb_switch_dealloc_dp_resource(in->sw, in);
 }
 
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index c6f18200fe92..a62db231f07b 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -789,8 +789,8 @@ void tb_path_free(struct tb_path *path);
 int tb_path_activate(struct tb_path *path);
 void tb_path_deactivate(struct tb_path *path);
 bool tb_path_is_invalid(struct tb_path *path);
-bool tb_path_switch_on_path(const struct tb_path *path,
-			    const struct tb_switch *sw);
+bool tb_path_port_on_path(const struct tb_path *path,
+			  const struct tb_port *port);
 
 int tb_drom_read(struct tb_switch *sw);
 int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 7896f8b7a69c..2aae2c76d880 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -423,7 +423,7 @@ static int tb_dp_xchg_caps(struct tb_tunnel *tunnel)
 	u32 out_dp_cap, out_rate, out_lanes, in_dp_cap, in_rate, in_lanes, bw;
 	struct tb_port *out = tunnel->dst_port;
 	struct tb_port *in = tunnel->src_port;
-	int ret;
+	int ret, max_bw;
 
 	/*
 	 * Copy DP_LOCAL_CAP register to DP_REMOTE_CAP register for
@@ -472,10 +472,15 @@ static int tb_dp_xchg_caps(struct tb_tunnel *tunnel)
 	tb_port_dbg(out, "maximum supported bandwidth %u Mb/s x%u = %u Mb/s\n",
 		    out_rate, out_lanes, bw);
 
-	if (tunnel->max_bw && bw > tunnel->max_bw) {
+	if (in->sw->config.depth < out->sw->config.depth)
+		max_bw = tunnel->max_down;
+	else
+		max_bw = tunnel->max_up;
+
+	if (max_bw && bw > max_bw) {
 		u32 new_rate, new_lanes, new_bw;
 
-		ret = tb_dp_reduce_bandwidth(tunnel->max_bw, in_rate, in_lanes,
+		ret = tb_dp_reduce_bandwidth(max_bw, in_rate, in_lanes,
 					     out_rate, out_lanes, &new_rate,
 					     &new_lanes);
 		if (ret) {
@@ -720,7 +725,10 @@ err_free:
  * @tb: Pointer to the domain structure
  * @in: DP in adapter port
  * @out: DP out adapter port
- * @max_bw: Maximum available bandwidth for the DP tunnel (%0 if not limited)
+ * @max_up: Maximum available upstream bandwidth for the DP tunnel (%0
+ *	    if not limited)
+ * @max_down: Maximum available downstream bandwidth for the DP tunnel
+ *	      (%0 if not limited)
  *
  * Allocates a tunnel between @in and @out that is capable of tunneling
  * Display Port traffic.
@@ -728,7 +736,8 @@ err_free:
  * Return: Returns a tb_tunnel on success or NULL on failure.
  */
 struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in,
-				     struct tb_port *out, int max_bw)
+				     struct tb_port *out, int max_up,
+				     int max_down)
 {
 	struct tb_tunnel *tunnel;
 	struct tb_path **paths;
@@ -746,7 +755,8 @@ struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in,
 	tunnel->consumed_bandwidth = tb_dp_consumed_bandwidth;
 	tunnel->src_port = in;
 	tunnel->dst_port = out;
-	tunnel->max_bw = max_bw;
+	tunnel->max_up = max_up;
+	tunnel->max_down = max_down;
 
 	paths = tunnel->paths;
 
@@ -866,6 +876,33 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
 	return tunnel;
 }
 
+static int tb_usb3_max_link_rate(struct tb_port *up, struct tb_port *down)
+{
+	int ret, up_max_rate, down_max_rate;
+
+	ret = usb4_usb3_port_max_link_rate(up);
+	if (ret < 0)
+		return ret;
+	up_max_rate = ret;
+
+	ret = usb4_usb3_port_max_link_rate(down);
+	if (ret < 0)
+		return ret;
+	down_max_rate = ret;
+
+	return min(up_max_rate, down_max_rate);
+}
+
+static int tb_usb3_init(struct tb_tunnel *tunnel)
+{
+	tb_tunnel_dbg(tunnel, "allocating initial bandwidth %d/%d Mb/s\n",
+		      tunnel->allocated_up, tunnel->allocated_down);
+
+	return usb4_usb3_port_allocate_bandwidth(tunnel->src_port,
+						 &tunnel->allocated_up,
+						 &tunnel->allocated_down);
+}
+
 static int tb_usb3_activate(struct tb_tunnel *tunnel, bool activate)
 {
 	int res;
@@ -880,6 +917,86 @@ static int tb_usb3_activate(struct tb_tunnel *tunnel, bool activate)
 	return 0;
 }
 
+static int tb_usb3_consumed_bandwidth(struct tb_tunnel *tunnel,
+		int *consumed_up, int *consumed_down)
+{
+	/*
+	 * PCIe tunneling affects the USB3 bandwidth so take that it
+	 * into account here.
+	 */
+	*consumed_up = tunnel->allocated_up * (3 + 1) / 3;
+	*consumed_down = tunnel->allocated_down * (3 + 1) / 3;
+	return 0;
+}
+
+static int tb_usb3_release_unused_bandwidth(struct tb_tunnel *tunnel)
+{
+	int ret;
+
+	ret = usb4_usb3_port_release_bandwidth(tunnel->src_port,
+					       &tunnel->allocated_up,
+					       &tunnel->allocated_down);
+	if (ret)
+		return ret;
+
+	tb_tunnel_dbg(tunnel, "decreased bandwidth allocation to %d/%d Mb/s\n",
+		      tunnel->allocated_up, tunnel->allocated_down);
+	return 0;
+}
+
+static void tb_usb3_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
+						int *available_up,
+						int *available_down)
+{
+	int ret, max_rate, allocate_up, allocate_down;
+
+	ret = usb4_usb3_port_actual_link_rate(tunnel->src_port);
+	if (ret <= 0) {
+		tb_tunnel_warn(tunnel, "tunnel is not up\n");
+		return;
+	}
+	/*
+	 * 90% of the max rate can be allocated for isochronous
+	 * transfers.
+	 */
+	max_rate = ret * 90 / 100;
+
+	/* No need to reclaim if already at maximum */
+	if (tunnel->allocated_up >= max_rate &&
+	    tunnel->allocated_down >= max_rate)
+		return;
+
+	/* Don't go lower than what is already allocated */
+	allocate_up = min(max_rate, *available_up);
+	if (allocate_up < tunnel->allocated_up)
+		allocate_up = tunnel->allocated_up;
+
+	allocate_down = min(max_rate, *available_down);
+	if (allocate_down < tunnel->allocated_down)
+		allocate_down = tunnel->allocated_down;
+
+	/* If no changes no need to do more */
+	if (allocate_up == tunnel->allocated_up &&
+	    allocate_down == tunnel->allocated_down)
+		return;
+
+	ret = usb4_usb3_port_allocate_bandwidth(tunnel->src_port, &allocate_up,
+						&allocate_down);
+	if (ret) {
+		tb_tunnel_info(tunnel, "failed to allocate bandwidth\n");
+		return;
+	}
+
+	tunnel->allocated_up = allocate_up;
+	*available_up -= tunnel->allocated_up;
+
+	tunnel->allocated_down = allocate_down;
+	*available_down -= tunnel->allocated_down;
+
+	tb_tunnel_dbg(tunnel, "increased bandwidth allocation to %d/%d Mb/s\n",
+		      tunnel->allocated_up, tunnel->allocated_down);
+}
+
 static void tb_usb3_init_path(struct tb_path *path)
 {
 	path->egress_fc_enable = TB_PATH_SOURCE | TB_PATH_INTERNAL;
@@ -960,6 +1077,29 @@ struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down)
 		goto err_deactivate;
 	}
 
+	if (!tb_route(down->sw)) {
+		int ret;
+
+		/*
+		 * Read the initial bandwidth allocation for the first
+		 * hop tunnel.
+		 */
+		ret = usb4_usb3_port_allocated_bandwidth(down,
+			&tunnel->allocated_up, &tunnel->allocated_down);
+		if (ret)
+			goto err_deactivate;
+
+		tb_tunnel_dbg(tunnel, "currently allocated bandwidth %d/%d Mb/s\n",
+			      tunnel->allocated_up, tunnel->allocated_down);
+
+		tunnel->init = tb_usb3_init;
+		tunnel->consumed_bandwidth = tb_usb3_consumed_bandwidth;
+		tunnel->release_unused_bandwidth =
+			tb_usb3_release_unused_bandwidth;
+		tunnel->reclaim_available_bandwidth =
+			tb_usb3_reclaim_available_bandwidth;
+	}
+
 	tb_tunnel_dbg(tunnel, "discovered\n");
 	return tunnel;
 
@@ -976,6 +1116,10 @@ err_free:
  * @tb: Pointer to the domain structure
  * @up: USB3 upstream adapter port
  * @down: USB3 downstream adapter port
+ * @max_up: Maximum available upstream bandwidth for the USB3 tunnel (%0
+ *	    if not limited).
+ * @max_down: Maximum available downstream bandwidth for the USB3 tunnel
+ *	      (%0 if not limited).
  *
  * Allocate an USB3 tunnel. The ports must be of type @TB_TYPE_USB3_UP and
  * @TB_TYPE_USB3_DOWN.
@@ -983,10 +1127,32 @@ err_free:
  * Return: Returns a tb_tunnel on success or %NULL on failure.
  */
 struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up,
-				       struct tb_port *down)
+				       struct tb_port *down, int max_up,
+				       int max_down)
 {
 	struct tb_tunnel *tunnel;
 	struct tb_path *path;
+	int max_rate = 0;
+
+	/*
+	 * Check that we have enough bandwidth available for the new
+	 * USB3 tunnel.
+	 */
+	if (max_up > 0 || max_down > 0) {
+		max_rate = tb_usb3_max_link_rate(down, up);
+		if (max_rate < 0)
+			return NULL;
+
+		/* Only 90% can be allocated for USB3 isochronous transfers */
+		max_rate = max_rate * 90 / 100;
+		tb_port_dbg(up, "required bandwidth for USB3 tunnel %d Mb/s\n",
+			    max_rate);
+
+		if (max_rate > max_up || max_rate > max_down) {
+			tb_port_warn(up, "not enough bandwidth for USB3 tunnel\n");
+			return NULL;
+		}
+	}
 
 	tunnel = tb_tunnel_alloc(tb, 2, TB_TUNNEL_USB3);
 	if (!tunnel)
@@ -995,6 +1161,8 @@ struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up,
 	tunnel->activate = tb_usb3_activate;
 	tunnel->src_port = down;
 	tunnel->dst_port = up;
+	tunnel->max_up = max_up;
+	tunnel->max_down = max_down;
 
 	path = tb_path_alloc(tb, down, TB_USB3_HOPID, up, TB_USB3_HOPID, 0,
 			     "USB3 Down");
@@ -1014,6 +1182,18 @@ struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up,
 	tb_usb3_init_path(path);
 	tunnel->paths[TB_USB3_PATH_UP] = path;
 
+	if (!tb_route(down->sw)) {
+		tunnel->allocated_up = max_rate;
+		tunnel->allocated_down = max_rate;
+
+		tunnel->init = tb_usb3_init;
+		tunnel->consumed_bandwidth = tb_usb3_consumed_bandwidth;
+		tunnel->release_unused_bandwidth =
+			tb_usb3_release_unused_bandwidth;
+		tunnel->reclaim_available_bandwidth =
+			tb_usb3_reclaim_available_bandwidth;
+	}
+
 	return tunnel;
 }
 
@@ -1146,22 +1326,23 @@ void tb_tunnel_deactivate(struct tb_tunnel *tunnel)
 }
 
 /**
- * tb_tunnel_switch_on_path() - Does the tunnel go through switch
+ * tb_tunnel_port_on_path() - Does the tunnel go through port
  * @tunnel: Tunnel to check
- * @sw: Switch to check
+ * @port: Port to check
  *
- * Returns true if @tunnel goes through @sw (direction does not matter),
+ * Returns true if @tunnel goes through @port (direction does not matter),
  * false otherwise.
  */
-bool tb_tunnel_switch_on_path(const struct tb_tunnel *tunnel,
-			      const struct tb_switch *sw)
+bool tb_tunnel_port_on_path(const struct tb_tunnel *tunnel,
+			    const struct tb_port *port)
 {
 	int i;
 
 	for (i = 0; i < tunnel->npaths; i++) {
 		if (!tunnel->paths[i])
 			continue;
-		if (tb_path_switch_on_path(tunnel->paths[i], sw))
+
+		if (tb_path_port_on_path(tunnel->paths[i], port))
 			return true;
 	}
 
@@ -1221,3 +1402,51 @@ out:
 
 	return 0;
 }
+
+/**
+ * tb_tunnel_release_unused_bandwidth() - Release unused bandwidth
+ * @tunnel: Tunnel whose unused bandwidth to release
+ *
+ * If tunnel supports dynamic bandwidth management (USB3 tunnels at the
+ * moment) this function makes it to release all the unused bandwidth.
+ *
+ * Returns %0 in case of success and negative errno otherwise.
+ */
+int tb_tunnel_release_unused_bandwidth(struct tb_tunnel *tunnel)
+{
+	if (!tb_tunnel_is_active(tunnel))
+		return 0;
+
+	if (tunnel->release_unused_bandwidth) {
+		int ret;
+
+		ret = tunnel->release_unused_bandwidth(tunnel);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * tb_tunnel_reclaim_available_bandwidth() - Reclaim available bandwidth
+ * @tunnel: Tunnel reclaiming available bandwidth
+ * @available_up: Available upstream bandwidth (in Mb/s)
+ * @available_down: Available downstream bandwidth (in Mb/s)
+ *
+ * Reclaims bandwidth from @available_up and @available_down and updates
+ * the variables accordingly (e.g decreases both according to what was
+ * reclaimed by the tunnel). If nothing was reclaimed the values are
+ * kept as is.
+ */
+void tb_tunnel_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
+					   int *available_up,
+					   int *available_down)
+{
+	if (!tb_tunnel_is_active(tunnel))
+		return;
+
+	if (tunnel->reclaim_available_bandwidth)
+		tunnel->reclaim_available_bandwidth(tunnel, available_up,
+						    available_down);
+}
diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h
index cc952b2be792..1d2a64eb060d 100644
--- a/drivers/thunderbolt/tunnel.h
+++ b/drivers/thunderbolt/tunnel.h
@@ -29,10 +29,16 @@ enum tb_tunnel_type {
  * @init: Optional tunnel specific initialization
  * @activate: Optional tunnel specific activation/deactivation
  * @consumed_bandwidth: Return how much bandwidth the tunnel consumes
+ * @release_unused_bandwidth: Release all unused bandwidth
+ * @reclaim_available_bandwidth: Reclaim back available bandwidth
  * @list: Tunnels are linked using this field
  * @type: Type of the tunnel
- * @max_bw: Maximum bandwidth (Mb/s) available for the tunnel (only for DP).
+ * @max_up: Maximum upstream bandwidth (Mb/s) available for the tunnel.
  *	    Only set if the bandwidth needs to be limited.
+ * @max_down: Maximum downstream bandwidth (Mb/s) available for the tunnel.
+ *	      Only set if the bandwidth needs to be limited.
+ * @allocated_up: Allocated upstream bandwidth (only for USB3)
+ * @allocated_down: Allocated downstream bandwidth (only for USB3)
  */
 struct tb_tunnel {
 	struct tb *tb;
@@ -44,9 +50,16 @@ struct tb_tunnel {
 	int (*activate)(struct tb_tunnel *tunnel, bool activate);
 	int (*consumed_bandwidth)(struct tb_tunnel *tunnel, int *consumed_up,
 				  int *consumed_down);
+	int (*release_unused_bandwidth)(struct tb_tunnel *tunnel);
+	void (*reclaim_available_bandwidth)(struct tb_tunnel *tunnel,
+					    int *available_up,
+					    int *available_down);
 	struct list_head list;
 	enum tb_tunnel_type type;
-	unsigned int max_bw;
+	int max_up;
+	int max_down;
+	int allocated_up;
+	int allocated_down;
 };
 
 struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down);
@@ -54,24 +67,30 @@ struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up,
 				      struct tb_port *down);
 struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in);
 struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in,
-				     struct tb_port *out, int max_bw);
+				     struct tb_port *out, int max_up,
+				     int max_down);
 struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
 				      struct tb_port *dst, int transmit_ring,
 				      int transmit_path, int receive_ring,
 				      int receive_path);
 struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down);
 struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up,
-				       struct tb_port *down);
+				       struct tb_port *down, int max_up,
+				       int max_down);
 
 void tb_tunnel_free(struct tb_tunnel *tunnel);
 int tb_tunnel_activate(struct tb_tunnel *tunnel);
 int tb_tunnel_restart(struct tb_tunnel *tunnel);
 void tb_tunnel_deactivate(struct tb_tunnel *tunnel);
 bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel);
-bool tb_tunnel_switch_on_path(const struct tb_tunnel *tunnel,
-			      const struct tb_switch *sw);
+bool tb_tunnel_port_on_path(const struct tb_tunnel *tunnel,
+			    const struct tb_port *port);
 int tb_tunnel_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up,
 				 int *consumed_down);
+int tb_tunnel_release_unused_bandwidth(struct tb_tunnel *tunnel);
+void tb_tunnel_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
+					   int *available_up,
+					   int *available_down);
 
 static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel)
 {