| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jerry Hoemann | 887 | 53.79% | 22 | 40.74% |
| Thomas Mingarelli | 489 | 29.65% | 8 | 14.81% |
| dann frazier | 149 | 9.04% | 8 | 14.81% |
| Don Zickus | 84 | 5.09% | 3 | 5.56% |
| Brian Boylston | 8 | 0.49% | 1 | 1.85% |
| Joe Perches | 7 | 0.42% | 1 | 1.85% |
| Wim Van Sebroeck | 6 | 0.36% | 4 | 7.41% |
| Hidehiro Kawai | 4 | 0.24% | 1 | 1.85% |
| Bernhard Walle | 3 | 0.18% | 1 | 1.85% |
| Arnd Bergmann | 3 | 0.18% | 1 | 1.85% |
| Ingo Molnar | 3 | 0.18% | 1 | 1.85% |
| Jean Delvare | 2 | 0.12% | 1 | 1.85% |
| Thomas Gleixner | 2 | 0.12% | 1 | 1.85% |
| Toshi Kani | 2 | 0.12% | 1 | 1.85% |
| Total | 1649 | 54 |
// SPDX-License-Identifier: GPL-2.0-only /* * HPE WatchDog Driver * based on * * SoftDog 0.05: A Software Watchdog Device * * (c) Copyright 2018 Hewlett Packard Enterprise Development LP * Thomas Mingarelli <thomas.mingarelli@hpe.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/device.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/types.h> #include <linux/watchdog.h> #include <asm/nmi.h> #define HPWDT_VERSION "2.0.3" #define SECS_TO_TICKS(secs) ((secs) * 1000 / 128) #define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000) #define HPWDT_MAX_TICKS 65535 #define HPWDT_MAX_TIMER TICKS_TO_SECS(HPWDT_MAX_TICKS) #define DEFAULT_MARGIN 30 #define PRETIMEOUT_SEC 9 static bool ilo5; static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */ static bool nowayout = WATCHDOG_NOWAYOUT; static bool pretimeout = IS_ENABLED(CONFIG_HPWDT_NMI_DECODING); static int kdumptimeout = -1; static void __iomem *pci_mem_addr; /* the PCI-memory address */ static unsigned long __iomem *hpwdt_nmistat; static unsigned long __iomem *hpwdt_timer_reg; static unsigned long __iomem *hpwdt_timer_con; static const struct pci_device_id hpwdt_devices[] = { { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB203) }, /* iLO2 */ { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3306) }, /* iLO3 */ {0}, /* terminate list */ }; MODULE_DEVICE_TABLE(pci, hpwdt_devices); static const struct pci_device_id hpwdt_blacklist[] = { { PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3306, PCI_VENDOR_ID_HP, 0x1979) }, /* auxilary iLO */ { PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3306, PCI_VENDOR_ID_HP_3PAR, 0x0289) }, /* CL */ {0}, /* terminate list */ }; static struct watchdog_device hpwdt_dev; /* * Watchdog operations */ static int hpwdt_hw_is_running(void) { return ioread8(hpwdt_timer_con) & 0x01; } static int hpwdt_start(struct watchdog_device *wdd) { int control = 0x81 | (pretimeout ? 0x4 : 0); int reload = SECS_TO_TICKS(min(wdd->timeout, wdd->max_hw_heartbeat_ms/1000)); dev_dbg(wdd->parent, "start watchdog 0x%08x:0x%08x:0x%02x\n", wdd->timeout, reload, control); iowrite16(reload, hpwdt_timer_reg); iowrite8(control, hpwdt_timer_con); return 0; } static void hpwdt_stop(void) { unsigned long data; pr_debug("stop watchdog\n"); data = ioread8(hpwdt_timer_con); data &= 0xFE; iowrite8(data, hpwdt_timer_con); } static int hpwdt_stop_core(struct watchdog_device *wdd) { hpwdt_stop(); return 0; } static void hpwdt_ping_ticks(int val) { val = min(val, HPWDT_MAX_TICKS); iowrite16(val, hpwdt_timer_reg); } static int hpwdt_ping(struct watchdog_device *wdd) { int reload = SECS_TO_TICKS(min(wdd->timeout, wdd->max_hw_heartbeat_ms/1000)); dev_dbg(wdd->parent, "ping watchdog 0x%08x:0x%08x\n", wdd->timeout, reload); hpwdt_ping_ticks(reload); return 0; } static unsigned int hpwdt_gettimeleft(struct watchdog_device *wdd) { return TICKS_TO_SECS(ioread16(hpwdt_timer_reg)); } static int hpwdt_settimeout(struct watchdog_device *wdd, unsigned int val) { dev_dbg(wdd->parent, "set_timeout = %d\n", val); wdd->timeout = val; if (val <= wdd->pretimeout) { dev_dbg(wdd->parent, "pretimeout < timeout. Setting to zero\n"); wdd->pretimeout = 0; pretimeout = 0; if (watchdog_active(wdd)) hpwdt_start(wdd); } hpwdt_ping(wdd); return 0; } #ifdef CONFIG_HPWDT_NMI_DECODING static int hpwdt_set_pretimeout(struct watchdog_device *wdd, unsigned int req) { unsigned int val = 0; dev_dbg(wdd->parent, "set_pretimeout = %d\n", req); if (req) { val = PRETIMEOUT_SEC; if (val >= wdd->timeout) return -EINVAL; } if (val != req) dev_dbg(wdd->parent, "Rounding pretimeout to: %d\n", val); wdd->pretimeout = val; pretimeout = !!val; if (watchdog_active(wdd)) hpwdt_start(wdd); return 0; } static int hpwdt_my_nmi(void) { return ioread8(hpwdt_nmistat) & 0x6; } /* * NMI Handler */ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) { unsigned int mynmi = hpwdt_my_nmi(); static char panic_msg[] = "00: An NMI occurred. Depending on your system the reason " "for the NMI is logged in any one of the following resources:\n" "1. Integrated Management Log (IML)\n" "2. OA Syslog\n" "3. OA Forward Progress Log\n" "4. iLO Event Log"; if (ilo5 && ulReason == NMI_UNKNOWN && !mynmi) return NMI_DONE; if (ilo5 && !pretimeout && !mynmi) return NMI_DONE; if (kdumptimeout < 0) hpwdt_stop(); else if (kdumptimeout == 0) ; else { unsigned int val = max((unsigned int)kdumptimeout, hpwdt_dev.timeout); hpwdt_ping_ticks(SECS_TO_TICKS(val)); } hex_byte_pack(panic_msg, mynmi); nmi_panic(regs, panic_msg); return NMI_HANDLED; } #endif /* CONFIG_HPWDT_NMI_DECODING */ static const struct watchdog_info ident = { .options = WDIOF_PRETIMEOUT | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "HPE iLO2+ HW Watchdog Timer", }; /* * Kernel interfaces */ static const struct watchdog_ops hpwdt_ops = { .owner = THIS_MODULE, .start = hpwdt_start, .stop = hpwdt_stop_core, .ping = hpwdt_ping, .set_timeout = hpwdt_settimeout, .get_timeleft = hpwdt_gettimeleft, #ifdef CONFIG_HPWDT_NMI_DECODING .set_pretimeout = hpwdt_set_pretimeout, #endif }; static struct watchdog_device hpwdt_dev = { .info = &ident, .ops = &hpwdt_ops, .min_timeout = 1, .timeout = DEFAULT_MARGIN, .pretimeout = PRETIMEOUT_SEC, .max_hw_heartbeat_ms = HPWDT_MAX_TIMER * 1000, }; /* * Init & Exit */ static int hpwdt_init_nmi_decoding(struct pci_dev *dev) { #ifdef CONFIG_HPWDT_NMI_DECODING int retval; /* * Only one function can register for NMI_UNKNOWN */ retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout, 0, "hpwdt"); if (retval) goto error; retval = register_nmi_handler(NMI_SERR, hpwdt_pretimeout, 0, "hpwdt"); if (retval) goto error1; retval = register_nmi_handler(NMI_IO_CHECK, hpwdt_pretimeout, 0, "hpwdt"); if (retval) goto error2; dev_info(&dev->dev, "HPE Watchdog Timer Driver: NMI decoding initialized\n"); return 0; error2: unregister_nmi_handler(NMI_SERR, "hpwdt"); error1: unregister_nmi_handler(NMI_UNKNOWN, "hpwdt"); error: dev_warn(&dev->dev, "Unable to register a die notifier (err=%d).\n", retval); return retval; #endif /* CONFIG_HPWDT_NMI_DECODING */ return 0; } static void hpwdt_exit_nmi_decoding(void) { #ifdef CONFIG_HPWDT_NMI_DECODING unregister_nmi_handler(NMI_UNKNOWN, "hpwdt"); unregister_nmi_handler(NMI_SERR, "hpwdt"); unregister_nmi_handler(NMI_IO_CHECK, "hpwdt"); #endif } static int hpwdt_init_one(struct pci_dev *dev, const struct pci_device_id *ent) { int retval; /* * First let's find out if we are on an iLO2+ server. We will * not run on a legacy ASM box. * So we only support the G5 ProLiant servers and higher. */ if (dev->subsystem_vendor != PCI_VENDOR_ID_HP && dev->subsystem_vendor != PCI_VENDOR_ID_HP_3PAR) { dev_warn(&dev->dev, "This server does not have an iLO2+ ASIC.\n"); return -ENODEV; } if (pci_match_id(hpwdt_blacklist, dev)) { dev_dbg(&dev->dev, "Not supported on this device\n"); return -ENODEV; } if (pci_enable_device(dev)) { dev_warn(&dev->dev, "Not possible to enable PCI Device: 0x%x:0x%x.\n", ent->vendor, ent->device); return -ENODEV; } pci_mem_addr = pci_iomap(dev, 1, 0x80); if (!pci_mem_addr) { dev_warn(&dev->dev, "Unable to detect the iLO2+ server memory.\n"); retval = -ENOMEM; goto error_pci_iomap; } hpwdt_nmistat = pci_mem_addr + 0x6e; hpwdt_timer_reg = pci_mem_addr + 0x70; hpwdt_timer_con = pci_mem_addr + 0x72; /* Have the core update running timer until user space is ready */ if (hpwdt_hw_is_running()) { dev_info(&dev->dev, "timer is running\n"); set_bit(WDOG_HW_RUNNING, &hpwdt_dev.status); } /* Initialize NMI Decoding functionality */ retval = hpwdt_init_nmi_decoding(dev); if (retval != 0) goto error_init_nmi_decoding; watchdog_stop_on_unregister(&hpwdt_dev); watchdog_set_nowayout(&hpwdt_dev, nowayout); watchdog_init_timeout(&hpwdt_dev, soft_margin, NULL); if (pretimeout && hpwdt_dev.timeout <= PRETIMEOUT_SEC) { dev_warn(&dev->dev, "timeout <= pretimeout. Setting pretimeout to zero\n"); pretimeout = 0; } hpwdt_dev.pretimeout = pretimeout ? PRETIMEOUT_SEC : 0; kdumptimeout = min(kdumptimeout, HPWDT_MAX_TIMER); hpwdt_dev.parent = &dev->dev; retval = watchdog_register_device(&hpwdt_dev); if (retval < 0) goto error_wd_register; dev_info(&dev->dev, "HPE Watchdog Timer Driver: Version: %s\n", HPWDT_VERSION); dev_info(&dev->dev, "timeout: %d seconds (nowayout=%d)\n", hpwdt_dev.timeout, nowayout); dev_info(&dev->dev, "pretimeout: %s.\n", pretimeout ? "on" : "off"); dev_info(&dev->dev, "kdumptimeout: %d.\n", kdumptimeout); if (dev->subsystem_vendor == PCI_VENDOR_ID_HP_3PAR) ilo5 = true; return 0; error_wd_register: hpwdt_exit_nmi_decoding(); error_init_nmi_decoding: pci_iounmap(dev, pci_mem_addr); error_pci_iomap: pci_disable_device(dev); return retval; } static void hpwdt_exit(struct pci_dev *dev) { watchdog_unregister_device(&hpwdt_dev); hpwdt_exit_nmi_decoding(); pci_iounmap(dev, pci_mem_addr); pci_disable_device(dev); } static struct pci_driver hpwdt_driver = { .name = "hpwdt", .id_table = hpwdt_devices, .probe = hpwdt_init_one, .remove = hpwdt_exit, }; MODULE_AUTHOR("Tom Mingarelli"); MODULE_DESCRIPTION("hpe watchdog driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(HPWDT_VERSION); module_param(soft_margin, int, 0); MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds"); module_param_named(timeout, soft_margin, int, 0); MODULE_PARM_DESC(timeout, "Alias of soft_margin"); module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); module_param(kdumptimeout, int, 0444); MODULE_PARM_DESC(kdumptimeout, "Timeout applied for crash kernel transition in seconds"); #ifdef CONFIG_HPWDT_NMI_DECODING module_param(pretimeout, bool, 0); MODULE_PARM_DESC(pretimeout, "Watchdog pretimeout enabled"); #endif module_pci_driver(hpwdt_driver);
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