/* * drivers/char/watchdog/davinci_wdt.c * * Watchdog driver for DaVinci DM644x/DM646x processors * * Copyright (C) 2006-2013 Texas Instruments. * * 2007 (c) MontaVista Software, Inc. This file is licensed under * the terms of the GNU General Public License version 2. This program * is licensed "as is" without any warranty of any kind, whether express * or implied. */ #include #include #include #include #include #include #include #include #include #include #define MODULE_NAME "DAVINCI-WDT: " #define DEFAULT_HEARTBEAT 60 #define MAX_HEARTBEAT 600 /* really the max margin is 264/27MHz*/ /* Timer register set definition */ #define PID12 (0x0) #define EMUMGT (0x4) #define TIM12 (0x10) #define TIM34 (0x14) #define PRD12 (0x18) #define PRD34 (0x1C) #define TCR (0x20) #define TGCR (0x24) #define WDTCR (0x28) /* TCR bit definitions */ #define ENAMODE12_DISABLED (0 << 6) #define ENAMODE12_ONESHOT (1 << 6) #define ENAMODE12_PERIODIC (2 << 6) /* TGCR bit definitions */ #define TIM12RS_UNRESET (1 << 0) #define TIM34RS_UNRESET (1 << 1) #define TIMMODE_64BIT_WDOG (2 << 2) /* WDTCR bit definitions */ #define WDEN (1 << 14) #define WDFLAG (1 << 15) #define WDKEY_SEQ0 (0xa5c6 << 16) #define WDKEY_SEQ1 (0xda7e << 16) static int heartbeat; /* * struct to hold data for each WDT device * @base - base io address of WD device * @clk - source clock of WDT * @wdd - hold watchdog device as is in WDT core */ struct davinci_wdt_device { void __iomem *base; struct clk *clk; struct watchdog_device wdd; }; static int davinci_wdt_start(struct watchdog_device *wdd) { u32 tgcr; u32 timer_margin; unsigned long wdt_freq; struct davinci_wdt_device *davinci_wdt = watchdog_get_drvdata(wdd); wdt_freq = clk_get_rate(davinci_wdt->clk); /* disable, internal clock source */ iowrite32(0, davinci_wdt->base + TCR); /* reset timer, set mode to 64-bit watchdog, and unreset */ iowrite32(0, davinci_wdt->base + TGCR); tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET; iowrite32(tgcr, davinci_wdt->base + TGCR); /* clear counter regs */ iowrite32(0, davinci_wdt->base + TIM12); iowrite32(0, davinci_wdt->base + TIM34); /* set timeout period */ timer_margin = (((u64)wdd->timeout * wdt_freq) & 0xffffffff); iowrite32(timer_margin, davinci_wdt->base + PRD12); timer_margin = (((u64)wdd->timeout * wdt_freq) >> 32); iowrite32(timer_margin, davinci_wdt->base + PRD34); /* enable run continuously */ iowrite32(ENAMODE12_PERIODIC, davinci_wdt->base + TCR); /* Once the WDT is in pre-active state write to * TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are * write protected (except for the WDKEY field) */ /* put watchdog in pre-active state */ iowrite32(WDKEY_SEQ0 | WDEN, davinci_wdt->base + WDTCR); /* put watchdog in active state */ iowrite32(WDKEY_SEQ1 | WDEN, davinci_wdt->base + WDTCR); return 0; } static int davinci_wdt_ping(struct watchdog_device *wdd) { struct davinci_wdt_device *davinci_wdt = watchdog_get_drvdata(wdd); /* put watchdog in service state */ iowrite32(WDKEY_SEQ0, davinci_wdt->base + WDTCR); /* put watchdog in active state */ iowrite32(WDKEY_SEQ1, davinci_wdt->base + WDTCR); return 0; } static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd) { u64 timer_counter; unsigned long freq; u32 val; struct davinci_wdt_device *davinci_wdt = watchdog_get_drvdata(wdd); /* if timeout has occured then return 0 */ val = ioread32(davinci_wdt->base + WDTCR); if (val & WDFLAG) return 0; freq = clk_get_rate(davinci_wdt->clk); if (!freq) return 0; timer_counter = ioread32(davinci_wdt->base + TIM12); timer_counter |= ((u64)ioread32(davinci_wdt->base + TIM34) << 32); do_div(timer_counter, freq); return wdd->timeout - timer_counter; } static const struct watchdog_info davinci_wdt_info = { .options = WDIOF_KEEPALIVEPING, .identity = "DaVinci/Keystone Watchdog", }; static const struct watchdog_ops davinci_wdt_ops = { .owner = THIS_MODULE, .start = davinci_wdt_start, .stop = davinci_wdt_ping, .ping = davinci_wdt_ping, .get_timeleft = davinci_wdt_get_timeleft, }; static int davinci_wdt_probe(struct platform_device *pdev) { int ret = 0; struct device *dev = &pdev->dev; struct resource *wdt_mem; struct watchdog_device *wdd; struct davinci_wdt_device *davinci_wdt; davinci_wdt = devm_kzalloc(dev, sizeof(*davinci_wdt), GFP_KERNEL); if (!davinci_wdt) return -ENOMEM; davinci_wdt->clk = devm_clk_get(dev, NULL); if (IS_ERR(davinci_wdt->clk)) { if (PTR_ERR(davinci_wdt->clk) != -EPROBE_DEFER) dev_err(&pdev->dev, "failed to get clock node\n"); return PTR_ERR(davinci_wdt->clk); } clk_prepare_enable(davinci_wdt->clk); platform_set_drvdata(pdev, davinci_wdt); wdd = &davinci_wdt->wdd; wdd->info = &davinci_wdt_info; wdd->ops = &davinci_wdt_ops; wdd->min_timeout = 1; wdd->max_timeout = MAX_HEARTBEAT; wdd->timeout = DEFAULT_HEARTBEAT; wdd->parent = &pdev->dev; watchdog_init_timeout(wdd, heartbeat, dev); dev_info(dev, "heartbeat %d sec\n", wdd->timeout); watchdog_set_drvdata(wdd, davinci_wdt); watchdog_set_nowayout(wdd, 1); wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); davinci_wdt->base = devm_ioremap_resource(dev, wdt_mem); if (IS_ERR(davinci_wdt->base)) return PTR_ERR(davinci_wdt->base); ret = watchdog_register_device(wdd); if (ret < 0) dev_err(dev, "cannot register watchdog device\n"); return ret; } static int davinci_wdt_remove(struct platform_device *pdev) { struct davinci_wdt_device *davinci_wdt = platform_get_drvdata(pdev); watchdog_unregister_device(&davinci_wdt->wdd); clk_disable_unprepare(davinci_wdt->clk); return 0; } static const struct of_device_id davinci_wdt_of_match[] = { { .compatible = "ti,davinci-wdt", }, {}, }; MODULE_DEVICE_TABLE(of, davinci_wdt_of_match); static struct platform_driver platform_wdt_driver = { .driver = { .name = "davinci-wdt", .of_match_table = davinci_wdt_of_match, }, .probe = davinci_wdt_probe, .remove = davinci_wdt_remove, }; module_platform_driver(platform_wdt_driver); MODULE_AUTHOR("Texas Instruments"); MODULE_DESCRIPTION("DaVinci Watchdog Driver"); module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat period in seconds from 1 to " __MODULE_STRING(MAX_HEARTBEAT) ", default " __MODULE_STRING(DEFAULT_HEARTBEAT)); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:davinci-wdt"); ory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/befs/super.h')
inters into that skb. Fix from Eric Dumazet. 12) Fix various bugs in legacy IRQ fallback handling in alx driver, from Tobias Regnery. 13) Do not allow lwtunnel drivers to be unloaded while they are referenced by active instances, from Robert Shearman. 14) Fix truncated PHY LED trigger names, from Geert Uytterhoeven. 15) Fix a few regressions from virtio_net XDP support, from John Fastabend and Jakub Kicinski. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (102 commits) ISDN: eicon: silence misleading array-bounds warning net: phy: micrel: add support for KSZ8795 gtp: fix cross netns recv on gtp socket gtp: clear DF bit on GTP packet tx gtp: add genl family modules alias tcp: don't annotate mark on control socket from tcp_v6_send_response() ravb: unmap descriptors when freeing rings virtio_net: reject XDP programs using header adjustment virtio_net: use dev_kfree_skb for small buffer XDP receive r8152: check rx after napi is enabled r8152: re-schedule napi for tx r8152: avoid start_xmit to schedule napi when napi is disabled r8152: avoid start_xmit to call napi_schedule during autosuspend net: dsa: Bring back device detaching in dsa_slave_suspend() net: phy: leds: Fix truncated LED trigger names net: phy: leds: Break dependency of phy.h on phy_led_triggers.h net: phy: leds: Clear phy_num_led_triggers on failure to avoid crash net-next: ethernet: mediatek: change the compatible string Documentation: devicetree: change the mediatek ethernet compatible string bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status(). ...
Diffstat (limited to 'fs/xfs/libxfs/xfs_attr_leaf.c')