linux/drivers/thunderbolt/Makefile

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# SPDX-License-Identifier: GPL-2.0-only
obj-${CONFIG_USB4} := thunderbolt.o
thunderbolt-objs := nhi.o nhi_ops.o ctl.o tb.o switch.o cap.o path.o tunnel.o eeprom.o
thunderbolt-objs += domain.o dma_port.o icm.o property.o xdomain.o lc.o tmu.o usb4.o
thunderbolt-objs += nvm.o retimer.o quirks.o
thunderbolt: Create device links from ACPI description The new way to describe relationship between tunneled ports and USB4 NHI (Native Host Interface) is with ACPI _DSD looking like below for a PCIe downstream port: Scope (\_SB.PCI0) { Device (NHI0) { } // Thunderbolt NHI Device (DSB0) // Hotplug downstream port { Name (_DSD, Package () { ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package () {"usb4-host-interface", \_SB.PCI0.NHI0}, ... } }) } } This is "documented" in these [1] USB-IF slides and being used on systems that ship with Windows. The _DSD can be added to tunneled USB3 and PCIe ports, and is needed to make sure the USB4 NHI is resumed before any of the tunneled ports so the protocol tunnels get established properly before the actual port itself is resumed. Othwerwise the USB/PCI core find the link may not be established and starts tearing down the device stack. This parses the ACPI description each time NHI is probed and tries to find devices that has the property and it references the NHI in question. For each matching device a device link from that device to the NHI is created. Since USB3 ports themselves do not get runtime suspended with the parent device (hub) we do not add the link from the USB3 port to USB4 NHI but instead we add the link from the xHCI device. This makes the device link usable for runtime PM as well. [1] https://www.usb.org/sites/default/files/D1T2-2%20-%20USB4%20on%20Windows.pdf Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-04-02 20:26:00 +08:00
thunderbolt-${CONFIG_ACPI} += acpi.o
thunderbolt: Add debugfs interface This adds debugfs interface that can be used for debugging possible issues in hardware/software. It exposes router and adapter config spaces through files like this: /sys/kernel/debug/thunderbolt/<DEVICE>/regs /sys/kernel/debug/thunderbolt/<DEVICE>/<PORT1>/regs /sys/kernel/debug/thunderbolt/<DEVICE>/<PORT1>/path /sys/kernel/debug/thunderbolt/<DEVICE>/<PORT1>/counters /sys/kernel/debug/thunderbolt/<DEVICE>/<PORT2>/regs /sys/kernel/debug/thunderbolt/<DEVICE>/<PORT2>/path /sys/kernel/debug/thunderbolt/<DEVICE>/<PORT2>/counters ... The "regs" is either the router or port configuration space register dump. The "path" is the port path configuration space and "counters" is the optional counters configuration space. These files contains one register per line so it should be easy to use normal filtering tools to find the registers of interest if needed. The router and adapter regs file becomes writable when CONFIG_USB4_DEBUGFS_WRITE is enabled (which is not supposed to be done in production systems) and in this case the developer can write "offset value" lines there to modify the hardware directly. For convenience this also supports the long format the read side produces (but ignores the additional fields). The counters file can be written even when CONFIG_USB4_DEBUGFS_WRITE is not enabled and it is only used to clear the counter values. Signed-off-by: Gil Fine <gil.fine@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-30 01:30:52 +08:00
thunderbolt-$(CONFIG_DEBUG_FS) += debugfs.o
thunderbolt-${CONFIG_USB4_KUNIT_TEST} += test.o