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/usb4.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/usb4.c')
| -rw-r--r-- | drivers/thunderbolt/usb4.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c index 67a2867382ed..680bc738dd66 100644 --- a/drivers/thunderbolt/usb4.c +++ b/drivers/thunderbolt/usb4.c @@ -331,13 +331,18 @@ int usb4_switch_setup(struct tb_switch *sw) if (ret) return ret; - if (sw->link_usb4 && tb_switch_find_port(parent, TB_TYPE_USB3_DOWN)) { + if (tb_acpi_may_tunnel_usb3() && sw->link_usb4 && + tb_switch_find_port(parent, TB_TYPE_USB3_DOWN)) { val |= ROUTER_CS_5_UTO; xhci = false; } - /* Only enable PCIe tunneling if the parent router supports it */ - if (tb_switch_find_port(parent, TB_TYPE_PCIE_DOWN)) { + /* + * Only enable PCIe tunneling if the parent router supports it + * and it is not disabled. + */ + if (tb_acpi_may_tunnel_pcie() && + tb_switch_find_port(parent, TB_TYPE_PCIE_DOWN)) { val |= ROUTER_CS_5_PTO; /* * xHCI can be enabled if PCIe tunneling is supported |