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Commit e78db6f0 authored by Mika Westerberg's avatar Mika Westerberg
Browse files

thunderbolt: Generalize port finding routines to support all port types 



We will be needing these routines to find Display Port adapters as well
so modify them to take port type as the second parameter.

Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
parent 344e0643

drivers/thunderbolt/switch.c

+16 −0
Original line number Diff line number Diff line
@@ -730,6 +730,22 @@ struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end, 
	return next;

}



/**

 * tb_port_is_enabled() - Is the adapter port enabled

 * @port: Port to check

 */

bool tb_port_is_enabled(struct tb_port *port)

{

	switch (port->config.type) {

	case TB_TYPE_PCIE_UP:

	case TB_TYPE_PCIE_DOWN:

		return tb_pci_port_is_enabled(port);



	default:

		return false;

	}

}



/**

 * tb_pci_port_is_enabled() - Is the PCIe adapter port enabled

 * @port: PCIe port to check

drivers/thunderbolt/tb.c

+17 −18
Original line number Diff line number Diff line
@@ -180,40 +180,39 @@ static void tb_free_unplugged_children(struct tb_switch *sw) 
	}

}





/**

 * find_pci_up_port() - return the first PCIe up port on @sw or NULL

 * tb_find_port() - return the first port of @type on @sw or NULL

 * @sw: Switch to find the port from

 * @type: Port type to look for

 */

static struct tb_port *tb_find_pci_up_port(struct tb_switch *sw)

static struct tb_port *tb_find_port(struct tb_switch *sw,

				    enum tb_port_type type)

{

	int i;

	for (i = 1; i <= sw->config.max_port_number; i++)

		if (sw->ports[i].config.type == TB_TYPE_PCIE_UP)

		if (sw->ports[i].config.type == type)

			return &sw->ports[i];

	return NULL;

}



/**

 * find_unused_down_port() - return the first inactive PCIe down port on @sw

 * tb_find_unused_port() - return the first inactive port on @sw

 * @sw: Switch to find the port on

 * @type: Port type to look for

 */

static struct tb_port *tb_find_unused_down_port(struct tb_switch *sw)

static struct tb_port *tb_find_unused_port(struct tb_switch *sw,

					   enum tb_port_type type)

{

	int i;

	int cap;

	int res;

	int data;



	for (i = 1; i <= sw->config.max_port_number; i++) {

		if (tb_is_upstream_port(&sw->ports[i]))

			continue;

		if (sw->ports[i].config.type != TB_TYPE_PCIE_DOWN)

			continue;

		cap = sw->ports[i].cap_adap;

		if (!cap)

		if (sw->ports[i].config.type != type)

			continue;

		res = tb_port_read(&sw->ports[i], &data, TB_CFG_PORT, cap, 1);

		if (res < 0)

		if (!sw->ports[i].cap_adap)

			continue;

		if (data & 0x80000000)

		if (tb_port_is_enabled(&sw->ports[i]))

			continue;

		return &sw->ports[i];

	}
@@ -255,7 +254,7 @@ static struct tb_port *tb_find_pcie_down(struct tb_switch *sw, 
	}



out:

	return tb_find_unused_down_port(sw);

	return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN);

}



static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw)
@@ -265,7 +264,7 @@ static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) 
	struct tb_switch *parent_sw;

	struct tb_tunnel *tunnel;



	up = tb_find_pci_up_port(sw);

	up = tb_find_port(sw, TB_TYPE_PCIE_UP);

	if (!up)

		return 0;

drivers/thunderbolt/tb.h

+1 −0
Original line number Diff line number Diff line
@@ -576,6 +576,7 @@ struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end, 


int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);

int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);

bool tb_port_is_enabled(struct tb_port *port);



bool tb_pci_port_is_enabled(struct tb_port *port);

int tb_pci_port_enable(struct tb_port *port, bool enable);