kernel/linux.git/include/linux/thunderbolt.h, branch v6.12.80

thunderbolt: Get rid of TB_CFG_PKG_PREPARE_TO_SLEEP

2024-04-19T04:52:45+00:00

This is not used anywhere in the driver so remove it. No functional changes. Signed-off-by: Mika Westerberg

thunderbolt: Constify the struct device_type usage

2024-02-26T07:15:49+00:00

Since commit aed65af1cc2f ("drivers: make device_type const"), the driver core can properly handle constant struct device_type. Move the tb_domain_type, tb_retimer_type, tb_switch_type, usb4_port_device_type, tb_service_type and tb_xdomain_type variables to be constant structures as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman Signed-off-by: Ricardo B. Marliere Signed-off-by: Mika Westerberg

thunderbolt: make tb_bus_type const

2023-12-20T07:21:57+00:00

Now that the driver core can properly handle constant struct bus_type, move the tb_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Andreas Noever Cc: Michael Jamet Cc: Yehezkel Bernat Cc: Acked-by: Mika Westerberg Link: https://lore.kernel.org/r/2023121904-utopia-broadcast-06d1@gregkh Signed-off-by: Greg Kroah-Hartman

thunderbolt: Fix typo in enum tb_link_width kernel-doc

2023-10-13T05:49:13+00:00

Typo trasmitters -> transmitters. Signed-off-by: Mika Westerberg Signed-off-by: Gil Fine

thunderbolt: Add support for USB4 v2 80 Gb/s link

2023-06-16T06:53:27+00:00

USB4 v2 bumps the per-lane speed up to 40 Gb/s. Also the lanes are always bonded which gives 80 Gb/s symmetric link (and 120/40 Gb/s asymmetric). This updates the speed and width of routers and XDomain connections to support the Gen 4 link. For now we keep the link as is even if it is already asymmetric. While there make tb_port_set_link_width() static. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg

thunderbolt: Show link type for XDomain connections too

2022-08-31T13:05:12+00:00

Following what we do for routers already, extend this to XDomain connections as well. This will show in sysfs whether the link is in USB4 or Thunderbolt mode. Signed-off-by: Mika Westerberg Signed-off-by: David S. Miller

Merge tag 'usb-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

2022-06-03T18:17:49+00:00

Pull USB / Thunderbolt updates from Greg KH: "Here is the "big" set of USB and Thunderbolt driver changes for 5.18-rc1. For the most part it's been a quiet development cycle for the USB core, but there are the usual "hot spots" of development activity. Included in here are: - Thunderbolt driver updates: - fixes for devices without displayport adapters - lane bonding support and improvements - other minor changes based on device testing - dwc3 gadget driver changes. It seems this driver will never be finished given that the IP core is showing up in zillions of new devices and each implementation decides to do something different with it... - uvc gadget driver updates as more devices start to use and rely on this hardware as well - usb_maxpacket() api changes to remove an unneeded and unused parameter. - usb-serial driver device id updates and small cleanups - typec cleanups and fixes based on device testing - device tree updates for usb properties - lots of other small fixes and driver updates. All of these have been in linux-next for weeks with no reported problems" * tag 'usb-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (154 commits) USB: new quirk for Dell Gen 2 devices usb: dwc3: core: Add error log when core soft reset failed usb: dwc3: gadget: Move null pinter check to proper place usb: hub: Simplify error and success path in port_over_current_notify usb: cdns3: allocate TX FIFO size according to composite EP number usb: dwc3: Fix ep0 handling when getting reset while doing control transfer usb: Probe EHCI, OHCI controllers asynchronously usb: isp1760: Fix out-of-bounds array access xhci: Don't defer primary roothub registration if there is only one roothub USB: serial: option: add Quectel BG95 modem USB: serial: pl2303: fix type detection for odd device xhci: Allow host runtime PM as default for Intel Alder Lake N xHCI xhci: Remove quirk for over 10 year old evaluation hardware xhci: prevent U2 link power state if Intel tier policy prevented U1 xhci: use generic command timer for stop endpoint commands. usb: host: xhci-plat: omit shared hcd if either root hub has no ports usb: host: xhci-plat: prepare operation w/o shared hcd usb: host: xhci-plat: create shared hcd after having added main hcd xhci: prepare for operation w/o shared hcd xhci: factor out parts of xhci_gen_setup() ...

thunderbolt: Add support for XDomain lane bonding

2022-05-05T06:25:23+00:00

The USB4 Inter-Domain Service specification defines a protocol that can be used to establish lane bonding between two USB4 domains (hosts). So far we have not implemented it because the host controller DMA was not fast enough to be able to go over 20 Gbits/s even if lanes were bonded. However, starting from Intel Alder Lake CPUs the DMA can go over 20 Gbits/s so now it makes more sense to add this support to the driver. Because both ends need to negotiate the bonding we add a simple state machine that tracks the connection state and does the necessary steps described by the USB4 Inter-Domain Service specification. We only establish lane bonding when both sides of the link support it. Otherwise we default to use the single lane. Also this is only done when software connection manager is used. On systems with firmware based connection manager, it handles the high-speed tunneling so bonding lanes is specific to the implementation (Intel firmware based connection manager does not support lane bonding). Signed-off-by: Mika Westerberg

thunderbolt: Make iommu_dma_protection more accurate

2022-04-28T08:30:25+00:00

Between me trying to get rid of iommu_present() and Mario wanting to support the AMD equivalent of DMAR_PLATFORM_OPT_IN, scrutiny has shown that the iommu_dma_protection attribute is being far too optimistic. Even if an IOMMU might be present for some PCI segment in the system, that doesn't necessarily mean it provides translation for the device(s) we care about. Furthermore, all that DMAR_PLATFORM_OPT_IN really does is tell us that memory was protected before the kernel was loaded, and prevent the user from disabling the intel-iommu driver entirely. While that lets us assume kernel integrity, what matters for actual runtime DMA protection is whether we trust individual devices, based on the "external facing" property that we expect firmware to describe for Thunderbolt ports. It's proven challenging to determine the appropriate ports accurately given the variety of possible topologies, so while still not getting a perfect answer, by putting enough faith in firmware we can at least get a good bit closer. If we can see that any device near a Thunderbolt NHI has all the requisites for Kernel DMA Protection, chances are that it *is* a relevant port, but moreover that implies that firmware is playing the game overall, so we'll use that to assume that all Thunderbolt ports should be correctly marked and thus will end up fully protected. CC: Mario Limonciello Reviewed-by: Christoph Hellwig Acked-by: Mika Westerberg Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/b153f208bc9eafab5105bad0358b77366509d2d4.1650878781.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel

thunderbolt: Add vendor specific NHI quirk for auto-clearing interrupt status

2021-08-09T11:58:29+00:00

Introduce nhi_check_quirks() routine to handle any vendor specific quirks to manage a hardware specific implementation. On Intel hardware the USB4 controller supports clearing the interrupt status register automatically right after it is being issued. For this reason add a new quirk that does that on all Intel hardware. Signed-off-by: Basavaraj Natikar Signed-off-by: Sanjay R Mehta Signed-off-by: Mika Westerberg