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/mena21_wdt.c | 228 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+) create mode 100644 drivers/watchdog/mena21_wdt.c (limited to 'drivers/watchdog/mena21_wdt.c') diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c new file mode 100644 index 000000000..99d2359d5 --- /dev/null +++ b/drivers/watchdog/mena21_wdt.c @@ -0,0 +1,228 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Watchdog driver for the A21 VME CPU Boards + * + * Copyright (C) 2013 MEN Mikro Elektronik Nuernberg GmbH + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define NUM_GPIOS 6 + +enum a21_wdt_gpios { + GPIO_WD_ENAB, + GPIO_WD_FAST, + GPIO_WD_TRIG, + GPIO_WD_RST0, + GPIO_WD_RST1, + GPIO_WD_RST2, +}; + +struct a21_wdt_drv { + struct watchdog_device wdt; + struct gpio_desc *gpios[NUM_GPIOS]; +}; + +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 unsigned int a21_wdt_get_bootstatus(struct a21_wdt_drv *drv) +{ + int reset = 0; + + reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0; + reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0; + reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0; + + return reset; +} + +static int a21_wdt_start(struct watchdog_device *wdt) +{ + struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); + + gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 1); + + return 0; +} + +static int a21_wdt_stop(struct watchdog_device *wdt) +{ + struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); + + gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0); + + return 0; +} + +static int a21_wdt_ping(struct watchdog_device *wdt) +{ + struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); + + gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 0); + ndelay(10); + gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 1); + + return 0; +} + +static int a21_wdt_set_timeout(struct watchdog_device *wdt, + unsigned int timeout) +{ + struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); + + if (timeout != 1 && timeout != 30) { + dev_err(wdt->parent, "Only 1 and 30 allowed as timeout\n"); + return -EINVAL; + } + + if (timeout == 30 && wdt->timeout == 1) { + dev_err(wdt->parent, + "Transition from fast to slow mode not allowed\n"); + return -EINVAL; + } + + if (timeout == 1) + gpiod_set_value(drv->gpios[GPIO_WD_FAST], 1); + else + gpiod_set_value(drv->gpios[GPIO_WD_FAST], 0); + + wdt->timeout = timeout; + + return 0; +} + +static const struct watchdog_info a21_wdt_info = { + .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, + .identity = "MEN A21 Watchdog", +}; + +static const struct watchdog_ops a21_wdt_ops = { + .owner = THIS_MODULE, + .start = a21_wdt_start, + .stop = a21_wdt_stop, + .ping = a21_wdt_ping, + .set_timeout = a21_wdt_set_timeout, +}; + +static struct watchdog_device a21_wdt = { + .info = &a21_wdt_info, + .ops = &a21_wdt_ops, + .min_timeout = 1, + .max_timeout = 30, +}; + +static int a21_wdt_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct a21_wdt_drv *drv; + unsigned int reset = 0; + int num_gpios; + int ret; + int i; + + drv = devm_kzalloc(dev, sizeof(struct a21_wdt_drv), GFP_KERNEL); + if (!drv) + return -ENOMEM; + + num_gpios = gpiod_count(dev, NULL); + if (num_gpios != NUM_GPIOS) { + dev_err(dev, "gpios DT property wrong, got %d want %d", + num_gpios, NUM_GPIOS); + return -ENODEV; + } + + /* Request the used GPIOs */ + for (i = 0; i < num_gpios; i++) { + enum gpiod_flags gflags; + + if (i < GPIO_WD_RST0) + gflags = GPIOD_ASIS; + else + gflags = GPIOD_IN; + drv->gpios[i] = devm_gpiod_get_index(dev, NULL, i, gflags); + if (IS_ERR(drv->gpios[i])) + return PTR_ERR(drv->gpios[i]); + + gpiod_set_consumer_name(drv->gpios[i], "MEN A21 Watchdog"); + + /* + * Retrieve the initial value from the GPIOs that should be + * output, then set up the line as output with that value. + */ + if (i < GPIO_WD_RST0) { + int val; + + val = gpiod_get_value(drv->gpios[i]); + gpiod_direction_output(drv->gpios[i], val); + } + } + + watchdog_init_timeout(&a21_wdt, 30, dev); + watchdog_set_nowayout(&a21_wdt, nowayout); + watchdog_set_drvdata(&a21_wdt, drv); + a21_wdt.parent = dev; + + reset = a21_wdt_get_bootstatus(drv); + if (reset == 2) + a21_wdt.bootstatus |= WDIOF_EXTERN1; + else if (reset == 4) + a21_wdt.bootstatus |= WDIOF_CARDRESET; + else if (reset == 5) + a21_wdt.bootstatus |= WDIOF_POWERUNDER; + else if (reset == 7) + a21_wdt.bootstatus |= WDIOF_EXTERN2; + + drv->wdt = a21_wdt; + dev_set_drvdata(dev, drv); + + ret = devm_watchdog_register_device(dev, &a21_wdt); + if (ret) + return ret; + + dev_info(dev, "MEN A21 watchdog timer driver enabled\n"); + + return 0; +} + +static void a21_wdt_shutdown(struct platform_device *pdev) +{ + struct a21_wdt_drv *drv = dev_get_drvdata(&pdev->dev); + + gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0); +} + +static const struct of_device_id a21_wdt_ids[] = { + { .compatible = "men,a021-wdt" }, + { }, +}; +MODULE_DEVICE_TABLE(of, a21_wdt_ids); + +static struct platform_driver a21_wdt_driver = { + .probe = a21_wdt_probe, + .shutdown = a21_wdt_shutdown, + .driver = { + .name = "a21-watchdog", + .of_match_table = a21_wdt_ids, + }, +}; + +module_platform_driver(a21_wdt_driver); + +MODULE_AUTHOR("MEN Mikro Elektronik"); +MODULE_DESCRIPTION("MEN A21 Watchdog"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:a21-watchdog"); -- cgit v1.2.3