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/shpchp_core.c | 346 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 346 insertions(+) create mode 100644 drivers/pci/hotplug/shpchp_core.c (limited to 'drivers/pci/hotplug/shpchp_core.c') diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c new file mode 100644 index 000000000..53692b048 --- /dev/null +++ b/drivers/pci/hotplug/shpchp_core.c @@ -0,0 +1,346 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Standard Hot Plug Controller Driver + * + * Copyright (C) 1995,2001 Compaq Computer Corporation + * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) + * Copyright (C) 2001 IBM Corp. + * Copyright (C) 2003-2004 Intel Corporation + * + * All rights reserved. + * + * Send feedback to , + * + */ + +#include +#include +#include +#include +#include +#include +#include "shpchp.h" + +/* Global variables */ +bool shpchp_debug; +bool shpchp_poll_mode; +int shpchp_poll_time; + +#define DRIVER_VERSION "0.4" +#define DRIVER_AUTHOR "Dan Zink , Greg Kroah-Hartman , Dely Sy " +#define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +module_param(shpchp_debug, bool, 0644); +module_param(shpchp_poll_mode, bool, 0644); +module_param(shpchp_poll_time, int, 0644); +MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); +MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); +MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); + +#define SHPC_MODULE_NAME "shpchp" + +static int set_attention_status(struct hotplug_slot *slot, u8 value); +static int enable_slot(struct hotplug_slot *slot); +static int disable_slot(struct hotplug_slot *slot); +static int get_power_status(struct hotplug_slot *slot, u8 *value); +static int get_attention_status(struct hotplug_slot *slot, u8 *value); +static int get_latch_status(struct hotplug_slot *slot, u8 *value); +static int get_adapter_status(struct hotplug_slot *slot, u8 *value); + +static const struct hotplug_slot_ops shpchp_hotplug_slot_ops = { + .set_attention_status = set_attention_status, + .enable_slot = enable_slot, + .disable_slot = disable_slot, + .get_power_status = get_power_status, + .get_attention_status = get_attention_status, + .get_latch_status = get_latch_status, + .get_adapter_status = get_adapter_status, +}; + +static int init_slots(struct controller *ctrl) +{ + struct slot *slot; + struct hotplug_slot *hotplug_slot; + char name[SLOT_NAME_SIZE]; + int retval; + int i; + + for (i = 0; i < ctrl->num_slots; i++) { + slot = kzalloc(sizeof(*slot), GFP_KERNEL); + if (!slot) { + retval = -ENOMEM; + goto error; + } + + hotplug_slot = &slot->hotplug_slot; + + slot->hp_slot = i; + slot->ctrl = ctrl; + slot->bus = ctrl->pci_dev->subordinate->number; + slot->device = ctrl->slot_device_offset + i; + slot->hpc_ops = ctrl->hpc_ops; + slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i); + + slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number); + if (!slot->wq) { + retval = -ENOMEM; + goto error_slot; + } + + mutex_init(&slot->lock); + INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); + + /* register this slot with the hotplug pci core */ + snprintf(name, SLOT_NAME_SIZE, "%d", slot->number); + hotplug_slot->ops = &shpchp_hotplug_slot_ops; + + ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x hp_slot=%x sun=%x slot_device_offset=%x\n", + pci_domain_nr(ctrl->pci_dev->subordinate), + slot->bus, slot->device, slot->hp_slot, slot->number, + ctrl->slot_device_offset); + retval = pci_hp_register(hotplug_slot, + ctrl->pci_dev->subordinate, slot->device, name); + if (retval) { + ctrl_err(ctrl, "pci_hp_register failed with error %d\n", + retval); + goto error_slotwq; + } + + get_power_status(hotplug_slot, &slot->pwr_save); + get_attention_status(hotplug_slot, &slot->attention_save); + get_latch_status(hotplug_slot, &slot->latch_save); + get_adapter_status(hotplug_slot, &slot->presence_save); + + list_add(&slot->slot_list, &ctrl->slot_list); + } + + return 0; +error_slotwq: + destroy_workqueue(slot->wq); +error_slot: + kfree(slot); +error: + return retval; +} + +void cleanup_slots(struct controller *ctrl) +{ + struct slot *slot, *next; + + list_for_each_entry_safe(slot, next, &ctrl->slot_list, slot_list) { + list_del(&slot->slot_list); + cancel_delayed_work(&slot->work); + destroy_workqueue(slot->wq); + pci_hp_deregister(&slot->hotplug_slot); + kfree(slot); + } +} + +/* + * set_attention_status - Turns the Amber LED for a slot on, off or blink + */ +static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) +{ + struct slot *slot = get_slot(hotplug_slot); + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + slot->attention_save = status; + slot->hpc_ops->set_attention_status(slot, status); + + return 0; +} + +static int enable_slot(struct hotplug_slot *hotplug_slot) +{ + struct slot *slot = get_slot(hotplug_slot); + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + return shpchp_sysfs_enable_slot(slot); +} + +static int disable_slot(struct hotplug_slot *hotplug_slot) +{ + struct slot *slot = get_slot(hotplug_slot); + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + return shpchp_sysfs_disable_slot(slot); +} + +static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = get_slot(hotplug_slot); + int retval; + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + retval = slot->hpc_ops->get_power_status(slot, value); + if (retval < 0) + *value = slot->pwr_save; + + return 0; +} + +static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = get_slot(hotplug_slot); + int retval; + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + retval = slot->hpc_ops->get_attention_status(slot, value); + if (retval < 0) + *value = slot->attention_save; + + return 0; +} + +static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = get_slot(hotplug_slot); + int retval; + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + retval = slot->hpc_ops->get_latch_status(slot, value); + if (retval < 0) + *value = slot->latch_save; + + return 0; +} + +static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) +{ + struct slot *slot = get_slot(hotplug_slot); + int retval; + + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + + retval = slot->hpc_ops->get_adapter_status(slot, value); + if (retval < 0) + *value = slot->presence_save; + + return 0; +} + +static bool shpc_capable(struct pci_dev *bridge) +{ + /* + * It is assumed that AMD GOLAM chips support SHPC but they do not + * have SHPC capability. + */ + if (bridge->vendor == PCI_VENDOR_ID_AMD && + bridge->device == PCI_DEVICE_ID_AMD_GOLAM_7450) + return true; + + if (pci_find_capability(bridge, PCI_CAP_ID_SHPC)) + return true; + + return false; +} + +static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + int rc; + struct controller *ctrl; + + if (!shpc_capable(pdev)) + return -ENODEV; + + if (acpi_get_hp_hw_control_from_firmware(pdev)) + return -ENODEV; + + ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + goto err_out_none; + + INIT_LIST_HEAD(&ctrl->slot_list); + + rc = shpc_init(ctrl, pdev); + if (rc) { + ctrl_dbg(ctrl, "Controller initialization failed\n"); + goto err_out_free_ctrl; + } + + pci_set_drvdata(pdev, ctrl); + + /* Setup the slot information structures */ + rc = init_slots(ctrl); + if (rc) { + ctrl_err(ctrl, "Slot initialization failed\n"); + goto err_out_release_ctlr; + } + + rc = shpchp_create_ctrl_files(ctrl); + if (rc) + goto err_cleanup_slots; + + pdev->shpc_managed = 1; + return 0; + +err_cleanup_slots: + cleanup_slots(ctrl); +err_out_release_ctlr: + ctrl->hpc_ops->release_ctlr(ctrl); +err_out_free_ctrl: + kfree(ctrl); +err_out_none: + return -ENODEV; +} + +static void shpc_remove(struct pci_dev *dev) +{ + struct controller *ctrl = pci_get_drvdata(dev); + + dev->shpc_managed = 0; + shpchp_remove_ctrl_files(ctrl); + ctrl->hpc_ops->release_ctlr(ctrl); + kfree(ctrl); +} + +static const struct pci_device_id shpcd_pci_tbl[] = { + {PCI_DEVICE_CLASS(PCI_CLASS_BRIDGE_PCI_NORMAL, ~0)}, + { /* end: all zeroes */ } +}; +MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); + +static struct pci_driver shpc_driver = { + .name = SHPC_MODULE_NAME, + .id_table = shpcd_pci_tbl, + .probe = shpc_probe, + .remove = shpc_remove, +}; + +static int __init shpcd_init(void) +{ + int retval; + + retval = pci_register_driver(&shpc_driver); + dbg("%s: pci_register_driver = %d\n", __func__, retval); + info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); + + return retval; +} + +static void __exit shpcd_cleanup(void) +{ + dbg("unload_shpchpd()\n"); + pci_unregister_driver(&shpc_driver); + info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); +} + +module_init(shpcd_init); +module_exit(shpcd_cleanup); -- cgit v1.2.3