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/watchdog/wafer5823wdt.c | 323 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 323 insertions(+) create mode 100644 drivers/watchdog/wafer5823wdt.c (limited to 'drivers/watchdog/wafer5823wdt.c') diff --git a/drivers/watchdog/wafer5823wdt.c b/drivers/watchdog/wafer5823wdt.c new file mode 100644 index 000000000..a8a1ed215 --- /dev/null +++ b/drivers/watchdog/wafer5823wdt.c @@ -0,0 +1,323 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * ICP Wafer 5823 Single Board Computer WDT driver + * http://www.icpamerica.com/wafer_5823.php + * May also work on other similar models + * + * (c) Copyright 2002 Justin Cormack + * + * Release 0.02 + * + * Based on advantechwdt.c which is based on wdt.c. + * Original copyright messages: + * + * (c) Copyright 1996-1997 Alan Cox , + * All Rights Reserved. + * + * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide + * warranty for any of this software. This material is provided + * "AS-IS" and at no charge. + * + * (c) Copyright 1995 Alan Cox + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define WATCHDOG_NAME "Wafer 5823 WDT" +#define PFX WATCHDOG_NAME ": " +#define WD_TIMO 60 /* 60 sec default timeout */ + +static unsigned long wafwdt_is_open; +static char expect_close; +static DEFINE_SPINLOCK(wafwdt_lock); + +/* + * You must set these - there is no sane way to probe for this board. + * + * To enable, write the timeout value in seconds (1 to 255) to I/O + * port WDT_START, then read the port to start the watchdog. To pat + * the dog, read port WDT_STOP to stop the timer, then read WDT_START + * to restart it again. + */ + +static int wdt_stop = 0x843; +static int wdt_start = 0x443; + +static int timeout = WD_TIMO; /* in seconds */ +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, + "Watchdog timeout in seconds. 1 <= timeout <= 255, default=" + __MODULE_STRING(WD_TIMO) "."); + +static bool nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, bool, 0); +MODULE_PARM_DESC(nowayout, + "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + +static void wafwdt_ping(void) +{ + /* pat watchdog */ + spin_lock(&wafwdt_lock); + inb_p(wdt_stop); + inb_p(wdt_start); + spin_unlock(&wafwdt_lock); +} + +static void wafwdt_start(void) +{ + /* start up watchdog */ + outb_p(timeout, wdt_start); + inb_p(wdt_start); +} + +static void wafwdt_stop(void) +{ + /* stop watchdog */ + inb_p(wdt_stop); +} + +static ssize_t wafwdt_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + /* See if we got the magic character 'V' and reload the timer */ + if (count) { + if (!nowayout) { + size_t i; + + /* In case it was set long ago */ + expect_close = 0; + + /* scan to see whether or not we got the magic + character */ + for (i = 0; i != count; i++) { + char c; + if (get_user(c, buf + i)) + return -EFAULT; + if (c == 'V') + expect_close = 42; + } + } + /* Well, anyhow someone wrote to us, we should + return that favour */ + wafwdt_ping(); + } + return count; +} + +static long wafwdt_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + int new_timeout; + void __user *argp = (void __user *)arg; + int __user *p = argp; + static const struct watchdog_info ident = { + .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | + WDIOF_MAGICCLOSE, + .firmware_version = 1, + .identity = "Wafer 5823 WDT", + }; + + switch (cmd) { + case WDIOC_GETSUPPORT: + if (copy_to_user(argp, &ident, sizeof(ident))) + return -EFAULT; + break; + + case WDIOC_GETSTATUS: + case WDIOC_GETBOOTSTATUS: + return put_user(0, p); + + case WDIOC_SETOPTIONS: + { + int options, retval = -EINVAL; + + if (get_user(options, p)) + return -EFAULT; + + if (options & WDIOS_DISABLECARD) { + wafwdt_stop(); + retval = 0; + } + + if (options & WDIOS_ENABLECARD) { + wafwdt_start(); + retval = 0; + } + + return retval; + } + + case WDIOC_KEEPALIVE: + wafwdt_ping(); + break; + + case WDIOC_SETTIMEOUT: + if (get_user(new_timeout, p)) + return -EFAULT; + if ((new_timeout < 1) || (new_timeout > 255)) + return -EINVAL; + timeout = new_timeout; + wafwdt_stop(); + wafwdt_start(); + fallthrough; + case WDIOC_GETTIMEOUT: + return put_user(timeout, p); + + default: + return -ENOTTY; + } + return 0; +} + +static int wafwdt_open(struct inode *inode, struct file *file) +{ + if (test_and_set_bit(0, &wafwdt_is_open)) + return -EBUSY; + + /* + * Activate + */ + wafwdt_start(); + return stream_open(inode, file); +} + +static int wafwdt_close(struct inode *inode, struct file *file) +{ + if (expect_close == 42) + wafwdt_stop(); + else { + pr_crit("WDT device closed unexpectedly. WDT will not stop!\n"); + wafwdt_ping(); + } + clear_bit(0, &wafwdt_is_open); + expect_close = 0; + return 0; +} + +/* + * Notifier for system down + */ + +static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, + void *unused) +{ + if (code == SYS_DOWN || code == SYS_HALT) + wafwdt_stop(); + return NOTIFY_DONE; +} + +/* + * Kernel Interfaces + */ + +static const struct file_operations wafwdt_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = wafwdt_write, + .unlocked_ioctl = wafwdt_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .open = wafwdt_open, + .release = wafwdt_close, +}; + +static struct miscdevice wafwdt_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &wafwdt_fops, +}; + +/* + * The WDT needs to learn about soft shutdowns in order to + * turn the timebomb registers off. + */ + +static struct notifier_block wafwdt_notifier = { + .notifier_call = wafwdt_notify_sys, +}; + +static int __init wafwdt_init(void) +{ + int ret; + + pr_info("WDT driver for Wafer 5823 single board computer initialising\n"); + + if (timeout < 1 || timeout > 255) { + timeout = WD_TIMO; + pr_info("timeout value must be 1 <= x <= 255, using %d\n", + timeout); + } + + if (wdt_stop != wdt_start) { + if (!request_region(wdt_stop, 1, "Wafer 5823 WDT")) { + pr_err("I/O address 0x%04x already in use\n", wdt_stop); + ret = -EIO; + goto error; + } + } + + if (!request_region(wdt_start, 1, "Wafer 5823 WDT")) { + pr_err("I/O address 0x%04x already in use\n", wdt_start); + ret = -EIO; + goto error2; + } + + ret = register_reboot_notifier(&wafwdt_notifier); + if (ret != 0) { + pr_err("cannot register reboot notifier (err=%d)\n", ret); + goto error3; + } + + ret = misc_register(&wafwdt_miscdev); + if (ret != 0) { + pr_err("cannot register miscdev on minor=%d (err=%d)\n", + WATCHDOG_MINOR, ret); + goto error4; + } + + pr_info("initialized. timeout=%d sec (nowayout=%d)\n", + timeout, nowayout); + + return ret; +error4: + unregister_reboot_notifier(&wafwdt_notifier); +error3: + release_region(wdt_start, 1); +error2: + if (wdt_stop != wdt_start) + release_region(wdt_stop, 1); +error: + return ret; +} + +static void __exit wafwdt_exit(void) +{ + misc_deregister(&wafwdt_miscdev); + unregister_reboot_notifier(&wafwdt_notifier); + if (wdt_stop != wdt_start) + release_region(wdt_stop, 1); + release_region(wdt_start, 1); +} + +module_init(wafwdt_init); +module_exit(wafwdt_exit); + +MODULE_AUTHOR("Justin Cormack"); +MODULE_DESCRIPTION("ICP Wafer 5823 Single Board Computer WDT driver"); +MODULE_LICENSE("GPL"); + +/* end of wafer5823wdt.c */ -- cgit v1.2.3