thunderbolt: Cache adapter specific capability offset into struct port
The adapter specific capability either is there or not if the port does
not hold an adapter. Instead of always finding it on-demand we read the
offset just once when the port is initialized.
While there we update the struct port documentation to follow kernel-doc
format.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index b3f93eb..9756e62 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -586,6 +586,10 @@ static int tb_init_port(struct tb_port *port)
port->cap_phy = cap;
else
tb_port_WARN(port, "non switch port without a PHY\n");
+ } else if (port->port != 0) {
+ cap = tb_port_find_cap(port, TB_PORT_CAP_ADAP);
+ if (cap > 0)
+ port->cap_adap = cap;
}
tb_dump_port(port->sw->tb, &port->config);
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index d8f4ed0..e71530d 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -151,8 +151,8 @@ static struct tb_port *tb_find_unused_down_port(struct tb_switch *sw)
continue;
if (sw->ports[i].config.type != TB_TYPE_PCIE_DOWN)
continue;
- cap = tb_port_find_cap(&sw->ports[i], TB_PORT_CAP_ADAP);
- if (cap < 0)
+ cap = sw->ports[i].cap_adap;
+ if (!cap)
continue;
res = tb_port_read(&sw->ports[i], &data, TB_CFG_PORT, cap, 1);
if (res < 0)
@@ -197,8 +197,8 @@ static void tb_activate_pcie_devices(struct tb *tb)
}
/* check whether port is already activated */
- cap = tb_port_find_cap(up_port, TB_PORT_CAP_ADAP);
- if (cap < 0)
+ cap = up_port->cap_adap;
+ if (!cap)
continue;
if (tb_port_read(up_port, &data, TB_CFG_PORT, cap, 1))
continue;
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 985a48a6..b4d7c4d 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -121,6 +121,7 @@ struct tb_switch {
* @remote: Remote port (%NULL if not connected)
* @xdomain: Remote host (%NULL if not connected)
* @cap_phy: Offset, zero if not found
+ * @cap_adap: Offset of the adapter specific capability (%0 if not present)
* @port: Port number on switch
* @disabled: Disabled by eeprom
* @dual_link_port: If the switch is connected using two ports, points
@@ -133,6 +134,7 @@ struct tb_port {
struct tb_port *remote;
struct tb_xdomain *xdomain;
int cap_phy;
+ int cap_adap;
u8 port;
bool disabled;
struct tb_port *dual_link_port;
diff --git a/drivers/thunderbolt/tunnel_pci.c b/drivers/thunderbolt/tunnel_pci.c
index 0637537..2de4edc 100644
--- a/drivers/thunderbolt/tunnel_pci.c
+++ b/drivers/thunderbolt/tunnel_pci.c
@@ -148,12 +148,9 @@ bool tb_pci_is_invalid(struct tb_pci_tunnel *tunnel)
static int tb_pci_port_active(struct tb_port *port, bool active)
{
u32 word = active ? 0x80000000 : 0x0;
- int cap = tb_port_find_cap(port, TB_PORT_CAP_ADAP);
- if (cap < 0) {
- tb_port_warn(port, "TB_PORT_CAP_ADAP not found: %d\n", cap);
- return cap;
- }
- return tb_port_write(port, &word, TB_CFG_PORT, cap, 1);
+ if (!port->cap_adap)
+ return -ENXIO;
+ return tb_port_write(port, &word, TB_CFG_PORT, port->cap_adap, 1);
}
/**