diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-02-18 16:14:42 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-02-04 10:45:25 +0300 |
| commit | c6da62a219d028de10f2e22e93a34c7ee2b88d03 (patch) | |
| tree | d8bf3538e6d14399f17ae2a51249ba5aaf9b8d17 /drivers/thunderbolt/tb.c | |
| parent | 5a6a2c0f0f43676df27632d657a3f18b151a7ef8 (diff) | |
thunderbolt: Add support for native USB4 _OSC
ACPI 6.4 introduced a new _OSC capability used to negotiate whether the
OS is supposed to use Software (native) or Firmware based Connection
Manager. If the native support is granted then there are set of bits
that enable/disable different tunnel types that the Software Connection
Manager is allowed to tunnel.
This adds support for this new USB4 _OSC accordingly. When PCIe
tunneling is disabled then the driver switches security level to be
"nopcie" following the security level 5 used in Firmware based
Connection Manager.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Diffstat (limited to 'drivers/thunderbolt/tb.c')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index ad3c285026d5..1f000ac1728b 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -437,6 +437,11 @@ static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw) struct tb_cm *tcm = tb_priv(tb); struct tb_tunnel *tunnel; + if (!tb_acpi_may_tunnel_usb3()) { + tb_dbg(tb, "USB3 tunneling disabled, not creating tunnel\n"); + return 0; + } + up = tb_switch_find_port(sw, TB_TYPE_USB3_UP); if (!up) return 0; @@ -512,6 +517,9 @@ static int tb_create_usb3_tunnels(struct tb_switch *sw) struct tb_port *port; int ret; + if (!tb_acpi_may_tunnel_usb3()) + return 0; + if (tb_route(sw)) { ret = tb_tunnel_usb3(sw->tb, sw); if (ret) @@ -841,6 +849,11 @@ static void tb_tunnel_dp(struct tb *tb) struct tb_port *port, *in, *out; struct tb_tunnel *tunnel; + if (!tb_acpi_may_tunnel_dp()) { + tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n"); + return; + } + /* * Find pair of inactive DP IN and DP OUT adapters and then * establish a DP tunnel between them. @@ -1549,7 +1562,11 @@ struct tb *tb_probe(struct tb_nhi *nhi) if (!tb) return NULL; - tb->security_level = TB_SECURITY_USER; + if (tb_acpi_may_tunnel_pcie()) + tb->security_level = TB_SECURITY_USER; + else + tb->security_level = TB_SECURITY_NOPCIE; + tb->cm_ops = &tb_cm_ops; tcm = tb_priv(tb); |