From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/thunderbolt/acpi.c | 382 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 382 insertions(+) create mode 100644 drivers/thunderbolt/acpi.c (limited to 'drivers/thunderbolt/acpi.c') diff --git a/drivers/thunderbolt/acpi.c b/drivers/thunderbolt/acpi.c new file mode 100644 index 000000000..317e4f5fd --- /dev/null +++ b/drivers/thunderbolt/acpi.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ACPI support + * + * Copyright (C) 2020, Intel Corporation + * Author: Mika Westerberg + */ + +#include +#include + +#include "tb.h" + +static acpi_status tb_acpi_add_link(acpi_handle handle, u32 level, void *data, + void **return_value) +{ + struct acpi_device *adev = acpi_fetch_acpi_dev(handle); + struct fwnode_handle *fwnode; + struct tb_nhi *nhi = data; + struct pci_dev *pdev; + struct device *dev; + + if (!adev) + return AE_OK; + + fwnode = fwnode_find_reference(acpi_fwnode_handle(adev), "usb4-host-interface", 0); + if (IS_ERR(fwnode)) + return AE_OK; + + /* It needs to reference this NHI */ + if (dev_fwnode(&nhi->pdev->dev) != fwnode) + goto out_put; + + /* + * Try to find physical device walking upwards to the hierarcy. + * We need to do this because the xHCI driver might not yet be + * bound so the USB3 SuperSpeed ports are not yet created. + */ + dev = acpi_get_first_physical_node(adev); + while (!dev) { + adev = acpi_dev_parent(adev); + if (!adev) + break; + dev = acpi_get_first_physical_node(adev); + } + + if (!dev) + goto out_put; + + /* + * Check that the device is PCIe. This is because USB3 + * SuperSpeed ports have this property and they are not power + * managed with the xHCI and the SuperSpeed hub so we create the + * link from xHCI instead. + */ + while (dev && !dev_is_pci(dev)) + dev = dev->parent; + + if (!dev) + goto out_put; + + /* + * Check that this actually matches the type of device we + * expect. It should either be xHCI or PCIe root/downstream + * port. + */ + pdev = to_pci_dev(dev); + if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI || + (pci_is_pcie(pdev) && + (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT || + pci_pcie_type(pdev) == PCI_EXP_TYPE_DOWNSTREAM))) { + const struct device_link *link; + + /* + * Make them both active first to make sure the NHI does + * not runtime suspend before the consumer. The + * pm_runtime_put() below then allows the consumer to + * runtime suspend again (which then allows NHI runtime + * suspend too now that the device link is established). + */ + pm_runtime_get_sync(&pdev->dev); + + link = device_link_add(&pdev->dev, &nhi->pdev->dev, + DL_FLAG_AUTOREMOVE_SUPPLIER | + DL_FLAG_RPM_ACTIVE | + DL_FLAG_PM_RUNTIME); + if (link) { + dev_dbg(&nhi->pdev->dev, "created link from %s\n", + dev_name(&pdev->dev)); + } else { + dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", + dev_name(&pdev->dev)); + } + + pm_runtime_put(&pdev->dev); + } + +out_put: + fwnode_handle_put(fwnode); + return AE_OK; +} + +/** + * tb_acpi_add_links() - Add device links based on ACPI description + * @nhi: Pointer to NHI + * + * Goes over ACPI namespace finding tunneled ports that reference to + * @nhi ACPI node. For each reference a device link is added. The link + * is automatically removed by the driver core. + */ +void tb_acpi_add_links(struct tb_nhi *nhi) +{ + acpi_status status; + + if (!has_acpi_companion(&nhi->pdev->dev)) + return; + + /* + * Find all devices that have usb4-host-controller interface + * property that references to this NHI. + */ + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 32, + tb_acpi_add_link, NULL, nhi, NULL); + if (ACPI_FAILURE(status)) + dev_warn(&nhi->pdev->dev, "failed to enumerate tunneled ports\n"); +} + +/** + * tb_acpi_is_native() - Did the platform grant native TBT/USB4 control + * + * Returns %true if the platform granted OS native control over + * TBT/USB4. In this case software based connection manager can be used, + * otherwise there is firmware based connection manager running. + */ +bool tb_acpi_is_native(void) +{ + return osc_sb_native_usb4_support_confirmed && + osc_sb_native_usb4_control; +} + +/** + * tb_acpi_may_tunnel_usb3() - Is USB3 tunneling allowed by the platform + * + * When software based connection manager is used, this function + * returns %true if platform allows native USB3 tunneling. + */ +bool tb_acpi_may_tunnel_usb3(void) +{ + if (tb_acpi_is_native()) + return osc_sb_native_usb4_control & OSC_USB_USB3_TUNNELING; + return true; +} + +/** + * tb_acpi_may_tunnel_dp() - Is DisplayPort tunneling allowed by the platform + * + * When software based connection manager is used, this function + * returns %true if platform allows native DP tunneling. + */ +bool tb_acpi_may_tunnel_dp(void) +{ + if (tb_acpi_is_native()) + return osc_sb_native_usb4_control & OSC_USB_DP_TUNNELING; + return true; +} + +/** + * tb_acpi_may_tunnel_pcie() - Is PCIe tunneling allowed by the platform + * + * When software based connection manager is used, this function + * returns %true if platform allows native PCIe tunneling. + */ +bool tb_acpi_may_tunnel_pcie(void) +{ + if (tb_acpi_is_native()) + return osc_sb_native_usb4_control & OSC_USB_PCIE_TUNNELING; + return true; +} + +/** + * tb_acpi_is_xdomain_allowed() - Are XDomain connections allowed + * + * When software based connection manager is used, this function + * returns %true if platform allows XDomain connections. + */ +bool tb_acpi_is_xdomain_allowed(void) +{ + if (tb_acpi_is_native()) + return osc_sb_native_usb4_control & OSC_USB_XDOMAIN; + return true; +} + +/* UUID for retimer _DSM: e0053122-795b-4122-8a5e-57be1d26acb3 */ +static const guid_t retimer_dsm_guid = + GUID_INIT(0xe0053122, 0x795b, 0x4122, + 0x8a, 0x5e, 0x57, 0xbe, 0x1d, 0x26, 0xac, 0xb3); + +#define RETIMER_DSM_QUERY_ONLINE_STATE 1 +#define RETIMER_DSM_SET_ONLINE_STATE 2 + +static int tb_acpi_retimer_set_power(struct tb_port *port, bool power) +{ + struct usb4_port *usb4 = port->usb4; + union acpi_object argv4[2]; + struct acpi_device *adev; + union acpi_object *obj; + int ret; + + if (!usb4->can_offline) + return 0; + + adev = ACPI_COMPANION(&usb4->dev); + if (WARN_ON(!adev)) + return 0; + + /* Check if we are already powered on (and in correct mode) */ + obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1, + RETIMER_DSM_QUERY_ONLINE_STATE, NULL, + ACPI_TYPE_INTEGER); + if (!obj) { + tb_port_warn(port, "ACPI: query online _DSM failed\n"); + return -EIO; + } + + ret = obj->integer.value; + ACPI_FREE(obj); + + if (power == ret) + return 0; + + tb_port_dbg(port, "ACPI: calling _DSM to power %s retimers\n", + power ? "on" : "off"); + + argv4[0].type = ACPI_TYPE_PACKAGE; + argv4[0].package.count = 1; + argv4[0].package.elements = &argv4[1]; + argv4[1].integer.type = ACPI_TYPE_INTEGER; + argv4[1].integer.value = power; + + obj = acpi_evaluate_dsm_typed(adev->handle, &retimer_dsm_guid, 1, + RETIMER_DSM_SET_ONLINE_STATE, argv4, + ACPI_TYPE_INTEGER); + if (!obj) { + tb_port_warn(port, + "ACPI: set online state _DSM evaluation failed\n"); + return -EIO; + } + + ret = obj->integer.value; + ACPI_FREE(obj); + + if (ret >= 0) { + if (power) + return ret == 1 ? 0 : -EBUSY; + return 0; + } + + tb_port_warn(port, "ACPI: set online state _DSM failed with error %d\n", ret); + return -EIO; +} + +/** + * tb_acpi_power_on_retimers() - Call platform to power on retimers + * @port: USB4 port + * + * Calls platform to turn on power to all retimers behind this USB4 + * port. After this function returns successfully the caller can + * continue with the normal retimer flows (as specified in the USB4 + * spec). Note if this returns %-EBUSY it means the type-C port is in + * non-USB4/TBT mode (there is non-USB4/TBT device connected). + * + * This should only be called if the USB4/TBT link is not up. + * + * Returns %0 on success. + */ +int tb_acpi_power_on_retimers(struct tb_port *port) +{ + return tb_acpi_retimer_set_power(port, true); +} + +/** + * tb_acpi_power_off_retimers() - Call platform to power off retimers + * @port: USB4 port + * + * This is the opposite of tb_acpi_power_on_retimers(). After returning + * successfully the normal operations with the @port can continue. + * + * Returns %0 on success. + */ +int tb_acpi_power_off_retimers(struct tb_port *port) +{ + return tb_acpi_retimer_set_power(port, false); +} + +static bool tb_acpi_bus_match(struct device *dev) +{ + return tb_is_switch(dev) || tb_is_usb4_port_device(dev); +} + +static struct acpi_device *tb_acpi_switch_find_companion(struct tb_switch *sw) +{ + struct acpi_device *adev = NULL; + struct tb_switch *parent_sw; + + /* + * Device routers exists under the downstream facing USB4 port + * of the parent router. Their _ADR is always 0. + */ + parent_sw = tb_switch_parent(sw); + if (parent_sw) { + struct tb_port *port = tb_port_at(tb_route(sw), parent_sw); + struct acpi_device *port_adev; + + port_adev = acpi_find_child_by_adr(ACPI_COMPANION(&parent_sw->dev), + port->port); + if (port_adev) + adev = acpi_find_child_device(port_adev, 0, false); + } else { + struct tb_nhi *nhi = sw->tb->nhi; + struct acpi_device *parent_adev; + + parent_adev = ACPI_COMPANION(&nhi->pdev->dev); + if (parent_adev) + adev = acpi_find_child_device(parent_adev, 0, false); + } + + return adev; +} + +static struct acpi_device *tb_acpi_find_companion(struct device *dev) +{ + /* + * The Thunderbolt/USB4 hierarchy looks like following: + * + * Device (NHI) + * Device (HR) // Host router _ADR == 0 + * Device (DFP0) // Downstream port _ADR == lane 0 adapter + * Device (DR) // Device router _ADR == 0 + * Device (UFP) // Upstream port _ADR == lane 0 adapter + * Device (DFP1) // Downstream port _ADR == lane 0 adapter number + * + * At the moment we bind the host router to the corresponding + * Linux device. + */ + if (tb_is_switch(dev)) + return tb_acpi_switch_find_companion(tb_to_switch(dev)); + else if (tb_is_usb4_port_device(dev)) + return acpi_find_child_by_adr(ACPI_COMPANION(dev->parent), + tb_to_usb4_port_device(dev)->port->port); + return NULL; +} + +static void tb_acpi_setup(struct device *dev) +{ + struct acpi_device *adev = ACPI_COMPANION(dev); + struct usb4_port *usb4 = tb_to_usb4_port_device(dev); + + if (!adev || !usb4) + return; + + if (acpi_check_dsm(adev->handle, &retimer_dsm_guid, 1, + BIT(RETIMER_DSM_QUERY_ONLINE_STATE) | + BIT(RETIMER_DSM_SET_ONLINE_STATE))) + usb4->can_offline = true; +} + +static struct acpi_bus_type tb_acpi_bus = { + .name = "thunderbolt", + .match = tb_acpi_bus_match, + .find_companion = tb_acpi_find_companion, + .setup = tb_acpi_setup, +}; + +int tb_acpi_init(void) +{ + return register_acpi_bus_type(&tb_acpi_bus); +} + +void tb_acpi_exit(void) +{ + unregister_acpi_bus_type(&tb_acpi_bus); +} -- cgit v1.2.3