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/it87_wdt.c | 354 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 354 insertions(+) create mode 100644 drivers/watchdog/it87_wdt.c (limited to 'drivers/watchdog/it87_wdt.c') diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c new file mode 100644 index 000000000..bb1122909 --- /dev/null +++ b/drivers/watchdog/it87_wdt.c @@ -0,0 +1,354 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Watchdog Timer Driver + * for ITE IT87xx Environment Control - Low Pin Count Input / Output + * + * (c) Copyright 2007 Oliver Schuster + * + * Based on softdog.c by Alan Cox, + * 83977f_wdt.c by Jose Goncalves, + * it87.c by Chris Gauthron, Jean Delvare + * + * Data-sheets: Publicly available at the ITE website + * http://www.ite.com.tw/ + * + * Support of the watchdog timers, which are available on + * IT8607, IT8620, IT8622, IT8625, IT8628, IT8655, IT8665, IT8686, + * IT8702, IT8712, IT8716, IT8718, IT8720, IT8721, IT8726, IT8728, + * IT8772, IT8783 and IT8784. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include + +#define WATCHDOG_NAME "IT87 WDT" + +/* Defaults for Module Parameter */ +#define DEFAULT_TIMEOUT 60 +#define DEFAULT_TESTMODE 0 +#define DEFAULT_NOWAYOUT WATCHDOG_NOWAYOUT + +/* IO Ports */ +#define REG 0x2e +#define VAL 0x2f + +/* Logical device Numbers LDN */ +#define GPIO 0x07 + +/* Configuration Registers and Functions */ +#define LDNREG 0x07 +#define CHIPID 0x20 +#define CHIPREV 0x22 + +/* Chip Id numbers */ +#define NO_DEV_ID 0xffff +#define IT8607_ID 0x8607 +#define IT8620_ID 0x8620 +#define IT8622_ID 0x8622 +#define IT8625_ID 0x8625 +#define IT8628_ID 0x8628 +#define IT8655_ID 0x8655 +#define IT8665_ID 0x8665 +#define IT8686_ID 0x8686 +#define IT8702_ID 0x8702 +#define IT8705_ID 0x8705 +#define IT8712_ID 0x8712 +#define IT8716_ID 0x8716 +#define IT8718_ID 0x8718 +#define IT8720_ID 0x8720 +#define IT8721_ID 0x8721 +#define IT8726_ID 0x8726 /* the data sheet suggest wrongly 0x8716 */ +#define IT8728_ID 0x8728 +#define IT8772_ID 0x8772 +#define IT8783_ID 0x8783 +#define IT8784_ID 0x8784 +#define IT8786_ID 0x8786 + +/* GPIO Configuration Registers LDN=0x07 */ +#define WDTCTRL 0x71 +#define WDTCFG 0x72 +#define WDTVALLSB 0x73 +#define WDTVALMSB 0x74 + +/* GPIO Bits WDTCFG */ +#define WDT_TOV1 0x80 +#define WDT_KRST 0x40 +#define WDT_TOVE 0x20 +#define WDT_PWROK 0x10 /* not in it8721 */ +#define WDT_INT_MASK 0x0f + +static unsigned int max_units, chip_type; + +static unsigned int timeout = DEFAULT_TIMEOUT; +static int testmode = DEFAULT_TESTMODE; +static bool nowayout = DEFAULT_NOWAYOUT; + +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds, default=" + __MODULE_STRING(DEFAULT_TIMEOUT)); +module_param(testmode, int, 0); +MODULE_PARM_DESC(testmode, "Watchdog test mode (1 = no reboot), default=" + __MODULE_STRING(DEFAULT_TESTMODE)); +module_param(nowayout, bool, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started, default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT)); + +/* Superio Chip */ + +static inline int superio_enter(void) +{ + /* + * Try to reserve REG and REG + 1 for exclusive access. + */ + if (!request_muxed_region(REG, 2, WATCHDOG_NAME)) + return -EBUSY; + + outb(0x87, REG); + outb(0x01, REG); + outb(0x55, REG); + outb(0x55, REG); + return 0; +} + +static inline void superio_exit(void) +{ + outb(0x02, REG); + outb(0x02, VAL); + release_region(REG, 2); +} + +static inline void superio_select(int ldn) +{ + outb(LDNREG, REG); + outb(ldn, VAL); +} + +static inline int superio_inb(int reg) +{ + outb(reg, REG); + return inb(VAL); +} + +static inline void superio_outb(int val, int reg) +{ + outb(reg, REG); + outb(val, VAL); +} + +static inline int superio_inw(int reg) +{ + int val; + outb(reg++, REG); + val = inb(VAL) << 8; + outb(reg, REG); + val |= inb(VAL); + return val; +} + +/* Internal function, should be called after superio_select(GPIO) */ +static void _wdt_update_timeout(unsigned int t) +{ + unsigned char cfg = WDT_KRST; + + if (testmode) + cfg = 0; + + if (t <= max_units) + cfg |= WDT_TOV1; + else + t /= 60; + + if (chip_type != IT8721_ID) + cfg |= WDT_PWROK; + + superio_outb(cfg, WDTCFG); + superio_outb(t, WDTVALLSB); + if (max_units > 255) + superio_outb(t >> 8, WDTVALMSB); +} + +static int wdt_update_timeout(unsigned int t) +{ + int ret; + + ret = superio_enter(); + if (ret) + return ret; + + superio_select(GPIO); + _wdt_update_timeout(t); + superio_exit(); + + return 0; +} + +static int wdt_round_time(int t) +{ + t += 59; + t -= t % 60; + return t; +} + +/* watchdog timer handling */ + +static int wdt_start(struct watchdog_device *wdd) +{ + return wdt_update_timeout(wdd->timeout); +} + +static int wdt_stop(struct watchdog_device *wdd) +{ + return wdt_update_timeout(0); +} + +/** + * wdt_set_timeout - set a new timeout value with watchdog ioctl + * @t: timeout value in seconds + * + * The hardware device has a 8 or 16 bit watchdog timer (depends on + * chip version) that can be configured to count seconds or minutes. + * + * Used within WDIOC_SETTIMEOUT watchdog device ioctl. + */ + +static int wdt_set_timeout(struct watchdog_device *wdd, unsigned int t) +{ + int ret = 0; + + if (t > max_units) + t = wdt_round_time(t); + + wdd->timeout = t; + + if (watchdog_hw_running(wdd)) + ret = wdt_update_timeout(t); + + return ret; +} + +static const struct watchdog_info ident = { + .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING, + .firmware_version = 1, + .identity = WATCHDOG_NAME, +}; + +static const struct watchdog_ops wdt_ops = { + .owner = THIS_MODULE, + .start = wdt_start, + .stop = wdt_stop, + .set_timeout = wdt_set_timeout, +}; + +static struct watchdog_device wdt_dev = { + .info = &ident, + .ops = &wdt_ops, + .min_timeout = 1, +}; + +static int __init it87_wdt_init(void) +{ + u8 chip_rev; + int rc; + + rc = superio_enter(); + if (rc) + return rc; + + chip_type = superio_inw(CHIPID); + chip_rev = superio_inb(CHIPREV) & 0x0f; + superio_exit(); + + switch (chip_type) { + case IT8702_ID: + max_units = 255; + break; + case IT8712_ID: + max_units = (chip_rev < 8) ? 255 : 65535; + break; + case IT8716_ID: + case IT8726_ID: + max_units = 65535; + break; + case IT8607_ID: + case IT8620_ID: + case IT8622_ID: + case IT8625_ID: + case IT8628_ID: + case IT8655_ID: + case IT8665_ID: + case IT8686_ID: + case IT8718_ID: + case IT8720_ID: + case IT8721_ID: + case IT8728_ID: + case IT8772_ID: + case IT8783_ID: + case IT8784_ID: + case IT8786_ID: + max_units = 65535; + break; + case IT8705_ID: + pr_err("Unsupported Chip found, Chip %04x Revision %02x\n", + chip_type, chip_rev); + return -ENODEV; + case NO_DEV_ID: + pr_err("no device\n"); + return -ENODEV; + default: + pr_err("Unknown Chip found, Chip %04x Revision %04x\n", + chip_type, chip_rev); + return -ENODEV; + } + + rc = superio_enter(); + if (rc) + return rc; + + superio_select(GPIO); + superio_outb(WDT_TOV1, WDTCFG); + superio_outb(0x00, WDTCTRL); + superio_exit(); + + if (timeout < 1 || timeout > max_units * 60) { + timeout = DEFAULT_TIMEOUT; + pr_warn("Timeout value out of range, use default %d sec\n", + DEFAULT_TIMEOUT); + } + + if (timeout > max_units) + timeout = wdt_round_time(timeout); + + wdt_dev.timeout = timeout; + wdt_dev.max_timeout = max_units * 60; + + watchdog_stop_on_reboot(&wdt_dev); + rc = watchdog_register_device(&wdt_dev); + if (rc) { + pr_err("Cannot register watchdog device (err=%d)\n", rc); + return rc; + } + + pr_info("Chip IT%04x revision %d initialized. timeout=%d sec (nowayout=%d testmode=%d)\n", + chip_type, chip_rev, timeout, nowayout, testmode); + + return 0; +} + +static void __exit it87_wdt_exit(void) +{ + watchdog_unregister_device(&wdt_dev); +} + +module_init(it87_wdt_init); +module_exit(it87_wdt_exit); + +MODULE_AUTHOR("Oliver Schuster"); +MODULE_DESCRIPTION("Hardware Watchdog Device Driver for IT87xx EC-LPC I/O"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3