diff options
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/edac_core.h | 14 | ||||
| -rw-r--r-- | drivers/edac/edac_device.c | 36 | ||||
| -rw-r--r-- | drivers/edac/edac_mc.c | 119 | ||||
| -rw-r--r-- | drivers/edac/edac_mc_sysfs.c | 14 | ||||
| -rw-r--r-- | drivers/edac/edac_module.c | 86 | ||||
| -rw-r--r-- | drivers/edac/edac_module.h | 5 |
6 files changed, 177 insertions, 97 deletions
diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h index f34ebb609d55..b73d659a4bb2 100644 --- a/drivers/edac/edac_core.h +++ b/drivers/edac/edac_core.h @@ -382,6 +382,15 @@ struct mem_ctl_info { /* edac sysfs device control */ struct kobject edac_mci_kobj; struct completion kobj_complete; + + /* work struct for this MC */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)) + struct delayed_work work; +#else + struct work_struct work; +#endif + /* the internal state of this controller instance */ + int op_state; }; /* @@ -573,6 +582,9 @@ struct edac_device_ctl_info { }; /* To get from the instance's wq to the beginning of the ctl structure */ +#define to_edac_mem_ctl_work(w) \ + container_of(w, struct mem_ctl_info, work) + #define to_edac_device_ctl_work(w) \ container_of(w,struct edac_device_ctl_info,work) @@ -584,6 +596,8 @@ static inline void edac_device_calc_delay( edac_dev->delay = edac_dev->poll_msec * HZ / 1000; } +#define edac_calc_delay(dev) dev->delay = dev->poll_msec * HZ / 1000; + /* * The alloc() and free() functions for the 'edac_device' control info * structure. A MC driver will allocate one of these for each edac_device diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c index 52db1b14fff5..3f4c8a28154a 100644 --- a/drivers/edac/edac_device.c +++ b/drivers/edac/edac_device.c @@ -332,17 +332,17 @@ EXPORT_SYMBOL(edac_device_find); /* - * edac_workq_function + * edac_device_workq_function * performs the operation scheduled by a workq request */ #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)) -static void edac_workq_function(struct work_struct *work_req) +static void edac_device_workq_function(struct work_struct *work_req) { struct delayed_work *d_work = (struct delayed_work*) work_req; struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work); #else -static void edac_workq_function(void *ptr) +static void edac_device_workq_function(void *ptr) { struct edac_device_ctl_info *edac_dev = (struct edac_device_ctl_info *) ptr; @@ -364,30 +364,31 @@ static void edac_workq_function(void *ptr) } /* - * edac_workq_setup + * edac_device_workq_setup * initialize a workq item for this edac_device instance * passing in the new delay period in msec */ -void edac_workq_setup(struct edac_device_ctl_info *edac_dev, unsigned msec) +void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev, + unsigned msec) { debugf0("%s()\n", __func__); edac_dev->poll_msec = msec; - edac_device_calc_delay(edac_dev); /* Calc delay jiffies */ + edac_calc_delay(edac_dev); /* Calc delay jiffies */ #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)) - INIT_DELAYED_WORK(&edac_dev->work,edac_workq_function); + INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function); #else - INIT_WORK(&edac_dev->work,edac_workq_function,edac_dev); + INIT_WORK(&edac_dev->work, edac_device_workq_function, edac_dev); #endif - queue_delayed_work(edac_workqueue,&edac_dev->work, edac_dev->delay); + queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay); } /* - * edac_workq_teardown + * edac_device_workq_teardown * stop the workq processing on this edac_dev */ -void edac_workq_teardown(struct edac_device_ctl_info *edac_dev) +void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev) { int status; @@ -409,10 +410,10 @@ void edac_device_reset_delay_period( lock_device_list(); /* cancel the current workq request */ - edac_workq_teardown(edac_dev); + edac_device_workq_teardown(edac_dev); /* restart the workq request, with new delay value */ - edac_workq_setup(edac_dev, value); + edac_device_workq_setup(edac_dev, value); unlock_device_list(); } @@ -479,8 +480,11 @@ int edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx) /* This instance is NOW RUNNING */ edac_dev->op_state = OP_RUNNING_POLL; - /* enable workq processing on this instance, default = 1000 msec */ - edac_workq_setup(edac_dev, 1000); + /* + * enable workq processing on this instance, + * default = 1000 msec + */ + edac_device_workq_setup(edac_dev, 1000); } else { edac_dev->op_state = OP_RUNNING_INTERRUPT; } @@ -538,7 +542,7 @@ struct edac_device_ctl_info * edac_device_del_device(struct device *dev) edac_dev->op_state = OP_OFFLINE; /* clear workq processing on this instance */ - edac_workq_teardown(edac_dev); + edac_device_workq_teardown(edac_dev); /* Tear down the sysfs entries for this instance */ edac_device_remove_sysfs(edac_dev); diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index d324e1eadd3c..3474ca9d90a4 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -184,6 +184,8 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, } } + mci->op_state = OP_ALLOC; + return mci; } EXPORT_SYMBOL_GPL(edac_mc_alloc); @@ -215,6 +217,107 @@ static struct mem_ctl_info *find_mci_by_dev(struct device *dev) return NULL; } +/* + * handler for EDAC to check if NMI type handler has asserted interrupt + */ +static int edac_mc_assert_error_check_and_clear(void) +{ + int vreg; + + if(edac_op_state == EDAC_OPSTATE_POLL) + return 1; + + vreg = atomic_read(&edac_err_assert); + if(vreg) { + atomic_set(&edac_err_assert, 0); + return 1; + } + + return 0; +} + +/* + * edac_mc_workq_function + * performs the operation scheduled by a workq request + */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)) +static void edac_mc_workq_function(struct work_struct *work_req) +{ + struct delayed_work *d_work = (struct delayed_work*) work_req; + struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work); +#else +static void edac_mc_workq_function(void *ptr) +{ + struct mem_ctl_info *mci = (struct mem_ctl_info *) ptr; +#endif + + mutex_lock(&mem_ctls_mutex); + + /* Only poll controllers that are running polled and have a check */ + if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL)) + mci->edac_check(mci); + + /* + * FIXME: temp place holder for PCI checks, + * goes away when we break out PCI + */ + edac_pci_do_parity_check(); + + mutex_unlock(&mem_ctls_mutex); + + /* Reschedule */ + queue_delayed_work(edac_workqueue, &mci->work, edac_mc_get_poll_msec()); +} + +/* + * edac_mc_workq_setup + * initialize a workq item for this mci + * passing in the new delay period in msec + */ +void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec) +{ + debugf0("%s()\n", __func__); + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)) + INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function); +#else + INIT_WORK(&mci->work, edac_mc_workq_function, mci); +#endif + queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec)); +} + +/* + * edac_mc_workq_teardown + * stop the workq processing on this mci + */ +void edac_mc_workq_teardown(struct mem_ctl_info *mci) +{ + int status; + + status = cancel_delayed_work(&mci->work); + if (status == 0) { + /* workq instance might be running, wait for it */ + flush_workqueue(edac_workqueue); + } +} + +/* + * edac_reset_delay_period + */ + +void edac_reset_delay_period(struct mem_ctl_info *mci, unsigned long value) +{ + mutex_lock(&mem_ctls_mutex); + + /* cancel the current workq request */ + edac_mc_workq_teardown(mci); + + /* restart the workq request, with new delay value */ + edac_mc_workq_setup(mci, value); + + mutex_unlock(&mem_ctls_mutex); +} + /* Return 0 on success, 1 on failure. * Before calling this function, caller must * assign a unique value to mci->mc_idx. @@ -351,6 +454,16 @@ int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx) goto fail1; } + /* If there IS a check routine, then we are running POLLED */ + if (mci->edac_check != NULL) { + /* This instance is NOW RUNNING */ + mci->op_state = OP_RUNNING_POLL; + + edac_mc_workq_setup(mci, edac_mc_get_poll_msec()); + } else { + mci->op_state = OP_RUNNING_INTERRUPT; + } + /* Report action taken */ edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n", mci->mod_name, mci->ctl_name, dev_name(mci)); @@ -386,6 +499,12 @@ struct mem_ctl_info * edac_mc_del_mc(struct device *dev) return NULL; } + /* marking MCI offline */ + mci->op_state = OP_OFFLINE; + + /* flush workq processes */ + edac_mc_workq_teardown(mci); + edac_remove_sysfs_mci_device(mci); del_mc_from_global_list(mci); mutex_unlock(&mem_ctls_mutex); diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 6e2785bd011c..6b2217b741fb 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -22,22 +22,28 @@ static int panic_on_ue; static int poll_msec = 1000; /* Getter functions for above */ -int edac_get_log_ue() +int edac_get_log_ue(void) { return log_ue; } -int edac_get_log_ce() +int edac_get_log_ce(void) { return log_ce; } -int edac_get_panic_on_ue() +int edac_get_panic_on_ue(void) { return panic_on_ue; } -int edac_get_poll_msec() +/* this is temporary */ +int edac_mc_get_poll_msec(void) +{ + return edac_get_poll_msec(); +} + +int edac_get_poll_msec(void) { return poll_msec; } diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c index 2f84f0d035be..dc900ed75178 100644 --- a/drivers/edac/edac_module.c +++ b/drivers/edac/edac_module.c @@ -1,6 +1,14 @@ - -#include <linux/freezer.h> -#include <linux/kthread.h> +/* + * edac_module.c + * + * (C) 2007 www.douglaskthompson.com + * 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. + * + * Author: Doug Thompson <norsk5@xmission.com> + * + */ #include <linux/edac.h> #include "edac_core.h" @@ -17,10 +25,6 @@ EXPORT_SYMBOL_GPL(edac_debug_level); /* scope is to module level only */ struct workqueue_struct *edac_workqueue; -/* private to this file */ -static struct task_struct *edac_thread; - - /* * sysfs object: /sys/devices/system/edac * need to export to other files in this modules @@ -84,63 +88,6 @@ static void edac_unregister_sysfs_edac_name(void) edac_class_valid = 0; } - -/* - * Check MC status every edac_get_poll_msec(). - * Check PCI status every edac_get_poll_msec() as well. - * - * This where the work gets done for edac. - * - * SMP safe, doesn't use NMI, and auto-rate-limits. - */ -static void do_edac_check(void) -{ - debugf3("%s()\n", __func__); - - /* perform the poll activities */ - edac_check_mc_devices(); - edac_pci_do_parity_check(); -} - -/* - * handler for EDAC to check if NMI type handler has asserted interrupt - */ -static int edac_assert_error_check_and_clear(void) -{ - int vreg; - - if(edac_op_state == EDAC_OPSTATE_POLL) - return 1; - - vreg = atomic_read(&edac_err_assert); - if(vreg) { - atomic_set(&edac_err_assert, 0); - return 1; - } - - return 0; -} - -/* - * Action thread for EDAC to perform the POLL operations - */ -static int edac_kernel_thread(void *arg) -{ - int msec; - - while (!kthread_should_stop()) { - if(edac_assert_error_check_and_clear()) - do_edac_check(); - - /* goto sleep for the interval */ - msec = (HZ * edac_get_poll_msec()) / 1000; - schedule_timeout_interruptible(msec); - try_to_freeze(); - } - - return 0; -} - /* * edac_workqueue_setup * initialize the edac work queue for polling operations @@ -221,19 +168,9 @@ static int __init edac_init(void) goto error_pci; } - /* create our kernel thread */ - edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac"); - - if (IS_ERR(edac_thread)) { - err = PTR_ERR(edac_thread); - goto error_work; - } - return 0; /* Error teardown stack */ -error_work: - edac_workqueue_teardown(); error_pci: edac_sysfs_pci_teardown(); error_mem: @@ -251,7 +188,6 @@ error: static void __exit edac_exit(void) { debugf0("%s()\n", __func__); - kthread_stop(edac_thread); /* tear down the various subsystems*/ edac_workqueue_teardown(); diff --git a/drivers/edac/edac_module.h b/drivers/edac/edac_module.h index 2758d03c3e03..22c52e43131d 100644 --- a/drivers/edac/edac_module.h +++ b/drivers/edac/edac_module.h @@ -28,6 +28,7 @@ extern int edac_get_log_ue(void); extern int edac_get_log_ce(void); extern int edac_get_panic_on_ue(void); extern int edac_get_poll_msec(void); +extern int edac_mc_get_poll_msec(void); extern int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev); extern void edac_device_remove_sysfs(struct edac_device_ctl_info *edac_dev); @@ -35,9 +36,9 @@ extern struct sysdev_class *edac_get_edac_class(void); /* edac core workqueue: single CPU mode */ extern struct workqueue_struct *edac_workqueue; -extern void edac_workq_setup(struct edac_device_ctl_info *edac_dev, +extern void edac_device_workq_setup(struct edac_device_ctl_info *edac_dev, unsigned msec); -extern void edac_workq_teardown(struct edac_device_ctl_info *edac_dev); +extern void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev); extern void edac_device_reset_delay_period( struct edac_device_ctl_info *edac_dev, unsigned long value); |