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/cpcihp_generic.c | 207 +++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 drivers/pci/hotplug/cpcihp_generic.c (limited to 'drivers/pci/hotplug/cpcihp_generic.c') diff --git a/drivers/pci/hotplug/cpcihp_generic.c b/drivers/pci/hotplug/cpcihp_generic.c new file mode 100644 index 000000000..17d71edf0 --- /dev/null +++ b/drivers/pci/hotplug/cpcihp_generic.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * cpcihp_generic.c + * + * Generic port I/O CompactPCI driver + * + * Copyright 2002 SOMA Networks, Inc. + * Copyright 2001 Intel San Luis Obispo + * Copyright 2000,2001 MontaVista Software Inc. + * + * This generic CompactPCI hotplug driver should allow using the PCI hotplug + * mechanism on any CompactPCI board that exposes the #ENUM signal as a bit + * in a system register that can be read through standard port I/O. + * + * Send feedback to + */ + +#include +#include +#include +#include +#include +#include "cpci_hotplug.h" + +#define DRIVER_VERSION "0.1" +#define DRIVER_AUTHOR "Scott Murray " +#define DRIVER_DESC "Generic port I/O CompactPCI Hot Plug Driver" + +#if !defined(MODULE) +#define MY_NAME "cpcihp_generic" +#else +#define MY_NAME THIS_MODULE->name +#endif + +#define dbg(format, arg...) \ + do { \ + if (debug) \ + printk(KERN_DEBUG "%s: " format "\n", \ + MY_NAME, ## arg); \ + } while (0) +#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME, ## arg) +#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME, ## arg) +#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME, ## arg) + +/* local variables */ +static bool debug; +static char *bridge; +static u8 bridge_busnr; +static u8 bridge_slot; +static struct pci_bus *bus; +static u8 first_slot; +static u8 last_slot; +static u16 port; +static unsigned int enum_bit; +static u8 enum_mask; + +static struct cpci_hp_controller_ops generic_hpc_ops; +static struct cpci_hp_controller generic_hpc; + +static int __init validate_parameters(void) +{ + char *str; + char *p; + unsigned long tmp; + + if (!bridge) { + info("not configured, disabling."); + return -EINVAL; + } + str = bridge; + if (!*str) + return -EINVAL; + + tmp = simple_strtoul(str, &p, 16); + if (p == str || tmp > 0xff) { + err("Invalid hotplug bus bridge device bus number"); + return -EINVAL; + } + bridge_busnr = (u8) tmp; + dbg("bridge_busnr = 0x%02x", bridge_busnr); + if (*p != ':') { + err("Invalid hotplug bus bridge device"); + return -EINVAL; + } + str = p + 1; + tmp = simple_strtoul(str, &p, 16); + if (p == str || tmp > 0x1f) { + err("Invalid hotplug bus bridge device slot number"); + return -EINVAL; + } + bridge_slot = (u8) tmp; + dbg("bridge_slot = 0x%02x", bridge_slot); + + dbg("first_slot = 0x%02x", first_slot); + dbg("last_slot = 0x%02x", last_slot); + if (!(first_slot && last_slot)) { + err("Need to specify first_slot and last_slot"); + return -EINVAL; + } + if (last_slot < first_slot) { + err("first_slot must be less than last_slot"); + return -EINVAL; + } + + dbg("port = 0x%04x", port); + dbg("enum_bit = 0x%02x", enum_bit); + if (enum_bit > 7) { + err("Invalid #ENUM bit"); + return -EINVAL; + } + enum_mask = 1 << enum_bit; + return 0; +} + +static int query_enum(void) +{ + u8 value; + + value = inb_p(port); + return ((value & enum_mask) == enum_mask); +} + +static int __init cpcihp_generic_init(void) +{ + int status; + struct resource *r; + struct pci_dev *dev; + + info(DRIVER_DESC " version: " DRIVER_VERSION); + status = validate_parameters(); + if (status) + return status; + + r = request_region(port, 1, "#ENUM hotswap signal register"); + if (!r) + return -EBUSY; + + dev = pci_get_domain_bus_and_slot(0, bridge_busnr, + PCI_DEVFN(bridge_slot, 0)); + if (!dev || dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) { + err("Invalid bridge device %s", bridge); + pci_dev_put(dev); + return -EINVAL; + } + bus = dev->subordinate; + pci_dev_put(dev); + + memset(&generic_hpc, 0, sizeof(struct cpci_hp_controller)); + generic_hpc_ops.query_enum = query_enum; + generic_hpc.ops = &generic_hpc_ops; + + status = cpci_hp_register_controller(&generic_hpc); + if (status != 0) { + err("Could not register cPCI hotplug controller"); + return -ENODEV; + } + dbg("registered controller"); + + status = cpci_hp_register_bus(bus, first_slot, last_slot); + if (status != 0) { + err("Could not register cPCI hotplug bus"); + goto init_bus_register_error; + } + dbg("registered bus"); + + status = cpci_hp_start(); + if (status != 0) { + err("Could not started cPCI hotplug system"); + goto init_start_error; + } + dbg("started cpci hp system"); + return 0; +init_start_error: + cpci_hp_unregister_bus(bus); +init_bus_register_error: + cpci_hp_unregister_controller(&generic_hpc); + err("status = %d", status); + return status; + +} + +static void __exit cpcihp_generic_exit(void) +{ + cpci_hp_stop(); + cpci_hp_unregister_bus(bus); + cpci_hp_unregister_controller(&generic_hpc); + release_region(port, 1); +} + +module_init(cpcihp_generic_init); +module_exit(cpcihp_generic_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); +module_param(bridge, charp, 0); +MODULE_PARM_DESC(bridge, "Hotswap bus bridge device, : (bus and slot are in hexadecimal)"); +module_param(first_slot, byte, 0); +MODULE_PARM_DESC(first_slot, "Hotswap bus first slot number"); +module_param(last_slot, byte, 0); +MODULE_PARM_DESC(last_slot, "Hotswap bus last slot number"); +module_param_hw(port, ushort, ioport, 0); +MODULE_PARM_DESC(port, "#ENUM signal I/O port"); +module_param(enum_bit, uint, 0); +MODULE_PARM_DESC(enum_bit, "#ENUM signal bit (0-7)"); -- cgit v1.2.3