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Date: Sat, 21 Feb 2009 18:08:03 -0500
From: Stephen Clark <sclark46@...thlink.net>
To: Wim Van Sebroeck <wim@...ana.be>
CC: Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [WATCHDOG] v2.6.29-rc5 iTCO_wdt regression.
Wim Van Sebroeck wrote:
> Hi Linus,
>
> This should have gone out more then 2 weeks ago, but a disk crash changed my planning :-(
>
> Please pull from 'master' branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog.git
> or if master.kernel.org hasn't synced up yet:
> master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog.git
>
> This will update the following files:
>
> drivers/watchdog/Kconfig | 2 -
> drivers/watchdog/iTCO_vendor_support.c | 32 ++++++++++++++++++++++++++----
> drivers/watchdog/iTCO_wdt.c | 35 +++++++++++++--------------------
> 3 files changed, 43 insertions(+), 26 deletions(-)
>
> with these Changes:
>
> Author: Wim Van Sebroeck <wim@...ana.be>
> Date: Wed Jan 28 20:51:04 2009 +0000
>
> [WATCHDOG] iTCO_wdt: fix SMI_EN regression 2
>
> bugzilla: #12363
> commit 7cd5b08be3c489df11b559fef210b81133764ad4 added a second regression:
> some Dell's and Compaq's lockup on boot. So we revert most of the code.
> The ICH9 reboot issue remains in place and will need some more fixing... :-(
Any idea when you could have a fix for the ICH9?
>
> Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
>
> The Changes can also be looked at on:
> http://www.kernel.org/git/?p=linux/kernel/git/wim/linux-2.6-watchdog.git;a=summary
>
> For completeness, I added the overal diff below.
>
> Greetings,
> Wim.
>
> ================================================================================
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 09a3d55..325c10f 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -406,7 +406,7 @@ config ITCO_WDT
> ---help---
> Hardware driver for the intel TCO timer based watchdog devices.
> These drivers are included in the Intel 82801 I/O Controller
> - Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
> + Hub family (from ICH0 up to ICH10) and in the Intel 63xxESB
> controller hub.
>
> The TCO (Total Cost of Ownership) timer is a watchdog timer
> diff --git a/drivers/watchdog/iTCO_vendor_support.c b/drivers/watchdog/iTCO_vendor_support.c
> index 2474ebc..d8264ad 100644
> --- a/drivers/watchdog/iTCO_vendor_support.c
> +++ b/drivers/watchdog/iTCO_vendor_support.c
> @@ -1,7 +1,7 @@
> /*
> * intel TCO vendor specific watchdog driver support
> *
> - * (c) Copyright 2006-2008 Wim Van Sebroeck <wim@...ana.be>.
> + * (c) Copyright 2006-2009 Wim Van Sebroeck <wim@...ana.be>.
> *
> * This program is free software; you can redistribute it and/or
> * modify it under the terms of the GNU General Public License
> @@ -19,7 +19,7 @@
>
> /* Module and version information */
> #define DRV_NAME "iTCO_vendor_support"
> -#define DRV_VERSION "1.02"
> +#define DRV_VERSION "1.03"
> #define PFX DRV_NAME ": "
>
> /* Includes */
> @@ -77,6 +77,26 @@ MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (n
> * 20.6 seconds.
> */
>
> +static void supermicro_old_pre_start(unsigned long acpibase)
> +{
> + unsigned long val32;
> +
> + /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
> + val32 = inl(SMI_EN);
> + val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
> + outl(val32, SMI_EN); /* Needed to activate watchdog */
> +}
> +
> +static void supermicro_old_pre_stop(unsigned long acpibase)
> +{
> + unsigned long val32;
> +
> + /* Bit 13: TCO_EN -> 1 = Enables the TCO logic to generate SMI# */
> + val32 = inl(SMI_EN);
> + val32 |= 0x00002000; /* Turn on SMI clearing watchdog */
> + outl(val32, SMI_EN); /* Needed to deactivate watchdog */
> +}
> +
> static void supermicro_old_pre_keepalive(unsigned long acpibase)
> {
> /* Reload TCO Timer (done in iTCO_wdt_keepalive) + */
> @@ -228,14 +248,18 @@ static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
> void iTCO_vendor_pre_start(unsigned long acpibase,
> unsigned int heartbeat)
> {
> - if (vendorsupport == SUPERMICRO_NEW_BOARD)
> + if (vendorsupport == SUPERMICRO_OLD_BOARD)
> + supermicro_old_pre_start(acpibase);
> + else if (vendorsupport == SUPERMICRO_NEW_BOARD)
> supermicro_new_pre_start(heartbeat);
> }
> EXPORT_SYMBOL(iTCO_vendor_pre_start);
>
> void iTCO_vendor_pre_stop(unsigned long acpibase)
> {
> - if (vendorsupport == SUPERMICRO_NEW_BOARD)
> + if (vendorsupport == SUPERMICRO_OLD_BOARD)
> + supermicro_old_pre_stop(acpibase);
> + else if (vendorsupport == SUPERMICRO_NEW_BOARD)
> supermicro_new_pre_stop();
> }
> EXPORT_SYMBOL(iTCO_vendor_pre_stop);
> diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
> index 5b395a4..3523349 100644
> --- a/drivers/watchdog/iTCO_wdt.c
> +++ b/drivers/watchdog/iTCO_wdt.c
> @@ -1,7 +1,7 @@
> /*
> - * intel TCO Watchdog Driver (Used in i82801 and i6300ESB chipsets)
> + * intel TCO Watchdog Driver (Used in i82801 and i63xxESB chipsets)
> *
> - * (c) Copyright 2006-2008 Wim Van Sebroeck <wim@...ana.be>.
> + * (c) Copyright 2006-2009 Wim Van Sebroeck <wim@...ana.be>.
> *
> * This program is free software; you can redistribute it and/or
> * modify it under the terms of the GNU General Public License
> @@ -63,7 +63,7 @@
>
> /* Module and version information */
> #define DRV_NAME "iTCO_wdt"
> -#define DRV_VERSION "1.04"
> +#define DRV_VERSION "1.05"
> #define PFX DRV_NAME ": "
>
> /* Includes */
> @@ -236,16 +236,16 @@ MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
>
> /* Address definitions for the TCO */
> /* TCO base address */
> -#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60
> +#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60
> /* SMI Control and Enable Register */
> -#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30
> +#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30
>
> #define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Curr. Value */
> #define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */
> -#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */
> -#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */
> -#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
> -#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */
> +#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */
> +#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */
> +#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
> +#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */
> #define TCO1_CNT TCOBASE + 0x08 /* TCO1 Control Register */
> #define TCO2_CNT TCOBASE + 0x0a /* TCO2 Control Register */
> #define TCOv2_TMR TCOBASE + 0x12 /* TCOv2 Timer Initial Value */
> @@ -338,7 +338,6 @@ static int iTCO_wdt_unset_NO_REBOOT_bit(void)
> static int iTCO_wdt_start(void)
> {
> unsigned int val;
> - unsigned long val32;
>
> spin_lock(&iTCO_wdt_private.io_lock);
>
> @@ -351,11 +350,6 @@ static int iTCO_wdt_start(void)
> return -EIO;
> }
>
> - /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
> - val32 = inl(SMI_EN);
> - val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
> - outl(val32, SMI_EN);
> -
> /* Force the timer to its reload value by writing to the TCO_RLD
> register */
> if (iTCO_wdt_private.iTCO_version == 2)
> @@ -378,7 +372,6 @@ static int iTCO_wdt_start(void)
> static int iTCO_wdt_stop(void)
> {
> unsigned int val;
> - unsigned long val32;
>
> spin_lock(&iTCO_wdt_private.io_lock);
>
> @@ -390,11 +383,6 @@ static int iTCO_wdt_stop(void)
> outw(val, TCO1_CNT);
> val = inw(TCO1_CNT);
>
> - /* Bit 13: TCO_EN -> 1 = Enables the TCO logic to generate SMI# */
> - val32 = inl(SMI_EN);
> - val32 |= 0x00002000;
> - outl(val32, SMI_EN);
> -
> /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
> iTCO_wdt_set_NO_REBOOT_bit();
>
> @@ -649,6 +637,7 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
> int ret;
> u32 base_address;
> unsigned long RCBA;
> + unsigned long val32;
>
> /*
> * Find the ACPI/PM base I/O address which is the base
> @@ -695,6 +684,10 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
> ret = -EIO;
> goto out;
> }
> + /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
> + val32 = inl(SMI_EN);
> + val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
> + outl(val32, SMI_EN);
>
> /* The TCO I/O registers reside in a 32-byte range pointed to
> by the TCOBASE value */
> --
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