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/pci/hotplug/acpi_pcihp.c | 212 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100644 drivers/pci/hotplug/acpi_pcihp.c (limited to 'drivers/pci/hotplug/acpi_pcihp.c') diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c new file mode 100644 index 000000000..4fedebf2f --- /dev/null +++ b/drivers/pci/hotplug/acpi_pcihp.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Common ACPI functions for hot plug platforms + * + * Copyright (C) 2006 Intel Corporation + * + * All rights reserved. + * + * Send feedback to + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MY_NAME "acpi_pcihp" + +#define dbg(fmt, arg...) do { if (debug_acpi) printk(KERN_DEBUG "%s: %s: " fmt, MY_NAME, __func__, ## arg); } while (0) +#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME, ## arg) +#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME, ## arg) +#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME, ## arg) + +#define METHOD_NAME__SUN "_SUN" +#define METHOD_NAME_OSHP "OSHP" + +static bool debug_acpi; + +/* acpi_run_oshp - get control of hotplug from the firmware + * + * @handle - the handle of the hotplug controller. + */ +static acpi_status acpi_run_oshp(acpi_handle handle) +{ + acpi_status status; + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; + + acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); + + /* run OSHP */ + status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL); + if (ACPI_FAILURE(status)) + if (status != AE_NOT_FOUND) + printk(KERN_ERR "%s:%s OSHP fails=0x%x\n", + __func__, (char *)string.pointer, status); + else + dbg("%s:%s OSHP not found\n", + __func__, (char *)string.pointer); + else + pr_debug("%s:%s OSHP passes\n", __func__, + (char *)string.pointer); + + kfree(string.pointer); + return status; +} + +/** + * acpi_get_hp_hw_control_from_firmware + * @pdev: the pci_dev of the bridge that has a hotplug controller + * + * Attempt to take hotplug control from firmware. + */ +int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev) +{ + const struct pci_host_bridge *host; + const struct acpi_pci_root *root; + acpi_status status; + acpi_handle chandle, handle; + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; + + /* + * If there's no ACPI host bridge (i.e., ACPI support is compiled + * into the kernel but the hardware platform doesn't support ACPI), + * there's nothing to do here. + */ + host = pci_find_host_bridge(pdev->bus); + root = acpi_pci_find_root(ACPI_HANDLE(&host->dev)); + if (!root) + return 0; + + /* + * If _OSC exists, it determines whether we're allowed to manage + * the SHPC. We executed it while enumerating the host bridge. + */ + if (root->osc_support_set) { + if (host->native_shpc_hotplug) + return 0; + return -ENODEV; + } + + /* + * In the absence of _OSC, we're always allowed to manage the SHPC. + * However, if an OSHP method is present, we must execute it so the + * firmware can transfer control to the OS, e.g., direct interrupts + * to the OS instead of to the firmware. + * + * N.B. The PCI Firmware Spec (r3.2, sec 4.8) does not endorse + * searching up the ACPI hierarchy, so the loops below are suspect. + */ + handle = ACPI_HANDLE(&pdev->dev); + if (!handle) { + /* + * This hotplug controller was not listed in the ACPI name + * space at all. Try to get ACPI handle of parent PCI bus. + */ + struct pci_bus *pbus; + for (pbus = pdev->bus; pbus; pbus = pbus->parent) { + handle = acpi_pci_get_bridge_handle(pbus); + if (handle) + break; + } + } + + while (handle) { + acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); + pci_info(pdev, "Requesting control of SHPC hotplug via OSHP (%s)\n", + (char *)string.pointer); + status = acpi_run_oshp(handle); + if (ACPI_SUCCESS(status)) + goto got_one; + if (acpi_is_root_bridge(handle)) + break; + chandle = handle; + status = acpi_get_parent(chandle, &handle); + if (ACPI_FAILURE(status)) + break; + } + + pci_info(pdev, "Cannot get control of SHPC hotplug\n"); + kfree(string.pointer); + return -ENODEV; +got_one: + pci_info(pdev, "Gained control of SHPC hotplug (%s)\n", + (char *)string.pointer); + kfree(string.pointer); + return 0; +} +EXPORT_SYMBOL(acpi_get_hp_hw_control_from_firmware); + +static int pcihp_is_ejectable(acpi_handle handle) +{ + acpi_status status; + unsigned long long removable; + if (!acpi_has_method(handle, "_ADR")) + return 0; + if (acpi_has_method(handle, "_EJ0")) + return 1; + status = acpi_evaluate_integer(handle, "_RMV", NULL, &removable); + if (ACPI_SUCCESS(status) && removable) + return 1; + return 0; +} + +/** + * acpi_pci_check_ejectable - check if handle is ejectable ACPI PCI slot + * @pbus: the PCI bus of the PCI slot corresponding to 'handle' + * @handle: ACPI handle to check + * + * Return 1 if handle is ejectable PCI slot, 0 otherwise. + */ +int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle) +{ + acpi_handle bridge_handle, parent_handle; + + bridge_handle = acpi_pci_get_bridge_handle(pbus); + if (!bridge_handle) + return 0; + if ((ACPI_FAILURE(acpi_get_parent(handle, &parent_handle)))) + return 0; + if (bridge_handle != parent_handle) + return 0; + return pcihp_is_ejectable(handle); +} +EXPORT_SYMBOL_GPL(acpi_pci_check_ejectable); + +static acpi_status +check_hotplug(acpi_handle handle, u32 lvl, void *context, void **rv) +{ + int *found = (int *)context; + if (pcihp_is_ejectable(handle)) { + *found = 1; + return AE_CTRL_TERMINATE; + } + return AE_OK; +} + +/** + * acpi_pci_detect_ejectable - check if the PCI bus has ejectable slots + * @handle: handle of the PCI bus to scan + * + * Returns 1 if the PCI bus has ACPI based ejectable slots, 0 otherwise. + */ +int acpi_pci_detect_ejectable(acpi_handle handle) +{ + int found = 0; + + if (!handle) + return found; + + acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1, + check_hotplug, NULL, (void *)&found, NULL); + return found; +} +EXPORT_SYMBOL_GPL(acpi_pci_detect_ejectable); + +module_param(debug_acpi, bool, 0644); +MODULE_PARM_DESC(debug_acpi, "Debugging mode for ACPI enabled or not"); -- cgit v1.2.3