diff options
Diffstat (limited to 'drivers/watchdog/hpwdt.c')
| -rw-r--r-- | drivers/watchdog/hpwdt.c | 53 |
1 files changed, 49 insertions, 4 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 68e84a212d00..b8205c6e61c1 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -31,11 +31,12 @@ #define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000) #define HPWDT_MAX_TIMER TICKS_TO_SECS(65535) #define DEFAULT_MARGIN 30 +#define PRETIMEOUT_SEC 9 static bool ilo5; static unsigned int soft_margin = DEFAULT_MARGIN; /* in seconds */ -static unsigned int reload; /* the computed soft_margin */ static bool nowayout = WATCHDOG_NOWAYOUT; +static bool pretimeout = IS_ENABLED(CONFIG_HPWDT_NMI_DECODING); static void __iomem *pci_mem_addr; /* the PCI-memory address */ static unsigned long __iomem *hpwdt_nmistat; @@ -55,10 +56,11 @@ MODULE_DEVICE_TABLE(pci, hpwdt_devices); */ static int hpwdt_start(struct watchdog_device *wdd) { - reload = SECS_TO_TICKS(wdd->timeout); + int control = 0x81 | (pretimeout ? 0x4 : 0); + int reload = SECS_TO_TICKS(wdd->timeout); iowrite16(reload, hpwdt_timer_reg); - iowrite8(0x85, hpwdt_timer_con); + iowrite8(control, hpwdt_timer_con); return 0; } @@ -81,7 +83,10 @@ static int hpwdt_stop_core(struct watchdog_device *wdd) static int hpwdt_ping(struct watchdog_device *wdd) { + int reload = SECS_TO_TICKS(wdd->timeout); + iowrite16(reload, hpwdt_timer_reg); + return 0; } @@ -93,12 +98,37 @@ static unsigned int hpwdt_gettimeleft(struct watchdog_device *wdd) static int hpwdt_settimeout(struct watchdog_device *wdd, unsigned int val) { wdd->timeout = val; + if (val <= wdd->pretimeout) { + 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; + + if (req) { + val = PRETIMEOUT_SEC; + if (val >= wdd->timeout) + return -EINVAL; + } + + 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; @@ -121,6 +151,9 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) if (ilo5 && ulReason == NMI_UNKNOWN && mynmi) return NMI_DONE; + if (ilo5 && !pretimeout) + return NMI_DONE; + hpwdt_stop(); hex_byte_pack(panic_msg, mynmi); @@ -132,7 +165,8 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) static const struct watchdog_info ident = { - .options = WDIOF_SETTIMEOUT | + .options = WDIOF_PRETIMEOUT | + WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "HPE iLO2+ HW Watchdog Timer", @@ -149,6 +183,9 @@ static const struct watchdog_ops hpwdt_ops = { .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 = { @@ -157,6 +194,9 @@ static struct watchdog_device hpwdt_dev = { .min_timeout = 1, .max_timeout = HPWDT_MAX_TIMER, .timeout = DEFAULT_MARGIN, +#ifdef CONFIG_HPWDT_NMI_DECODING + .pretimeout = PRETIMEOUT_SEC, +#endif }; @@ -317,4 +357,9 @@ module_param(nowayout, bool, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +#ifdef CONFIG_HPWDT_NMI_DECODING +module_param(pretimeout, bool, 0); +MODULE_PARM_DESC(pretimeout, "Watchdog pretimeout enabled"); +#endif + module_pci_driver(hpwdt_driver); |