thunderbolt: Add support for authenticate on disconnect (1cb36293) · Commits · 戴 / test

Documentation/ABI/testing/sysfs-bus-thunderbolt

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		@@ -276,3 +276,16 @@ Date: Oct 2020
		KernelVersion: v5.9
		Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
		Description: Retimer vendor identifier read from the hardware.

		What: /sys/bus/thunderbolt/devices/.../nvm_authenticate_on_disconnect
		Date: Oct 2020
		KernelVersion: v5.9
		Contact: Mario Limonciello <mario.limonciello@dell.com>
		Description: For supported devices, automatically authenticate the new Thunderbolt
		image when the device is disconnected from the host system.

		This file will accept writing values "1" or "2"
		- Writing "1" will flush the image to the storage
		area and prepare the device for authentication on disconnect.
		- Writing "2" will run some basic validation on the image
		and flush it to the storage area.

+1 −1

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		@@ -2,6 +2,6 @@
		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
		thunderbolt-objs += nvm.o retimer.o quirks.o

		obj-${CONFIG_USB4_KUNIT_TEST} += test.o

+1 −0

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		@@ -599,6 +599,7 @@ parse:
		sw->uid = header->uid;
		sw->vendor = header->vendor_id;
		sw->device = header->model_id;
		tb_check_quirks(sw);

		crc = tb_crc32(sw->drom + TB_DROM_DATA_START, header->data_len);
		if (crc != header->data_crc32) {

+14 −0

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		@@ -366,3 +366,17 @@ int tb_lc_dp_sink_dealloc(struct tb_switch sw, struct tb_port in)
		tb_port_dbg(in, "sink %d de-allocated\n", sink);
		return 0;
		}

		/**
		* tb_lc_force_power() - Forces LC to be powered on
		* @sw: Thunderbolt switch
		*
		* This is useful to let authentication cycle pass even without
		* a Thunderbolt link present.
		*/
		int tb_lc_force_power(struct tb_switch *sw)
		{
		u32 in = 0xffff;

		return tb_sw_write(sw, &in, TB_CFG_SWITCH, TB_LC_POWER, 1);
		}

0 → 100644

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		// SPDX-License-Identifier: GPL-2.0
		/*
		* Thunderbolt driver - quirks
		*
		* Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com>
		*/

		#include "tb.h"

		static void quirk_force_power_link(struct tb_switch *sw)
		{
		sw->quirks \|= QUIRK_FORCE_POWER_LINK_CONTROLLER;
		}

		struct tb_quirk {
		u16 vendor;
		u16 device;
		void (hook)(struct tb_switch sw);
		};

		const static struct tb_quirk tb_quirks[] = {
		/* Dell WD19TB supports self-authentication on unplug */
		{ 0x00d4, 0xb070, quirk_force_power_link },
		};

		/**
		* tb_check_quirks() - Check for quirks to apply
		* @sw: Thunderbolt switch
		*
		* Apply any quirks for the Thunderbolt controller
		*/
		void tb_check_quirks(struct tb_switch *sw)
		{
		int i;

		for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
		const struct tb_quirk *q = &tb_quirks[i];

		if (sw->device == q->device && sw->vendor == q->vendor)
		q->hook(sw);
		}
		}