#include "edac_core.h"
#include "edac_module.h"
-/* lock to memory controller's control array 'edac_device_list' */
+/* lock for the list: 'edac_device_list', manipulation of this list
+ * is protected by the 'device_ctls_mutex' lock
+ */
static DEFINE_MUTEX(device_ctls_mutex);
-static struct list_head edac_device_list = LIST_HEAD_INIT(edac_device_list);
+static LIST_HEAD(edac_device_list);
#ifdef CONFIG_EDAC_DEBUG
static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
void *pvt;
int err;
- debugf1("%s() instances=%d blocks=%d\n",
+ debugf4("%s() instances=%d blocks=%d\n",
__func__, nr_instances, nr_blocks);
/* Calculate the size of memory we need to allocate AND
dev_ctl->instances = dev_inst;
dev_ctl->pvt_info = pvt;
+ /* Default logging of CEs and UEs */
+ dev_ctl->log_ce = 1;
+ dev_ctl->log_ue = 1;
+
/* Name of this edac device */
snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);
+ debugf4("%s() edac_dev=%p next after end=%p\n",
+ __func__, dev_ctl, pvt + sz_private );
+
/* Initialize every Instance */
for (instance = 0; instance < nr_instances; instance++) {
inst = &dev_inst[instance];
snprintf(blk->name, sizeof(blk->name),
"%s%d", edac_block_name, block+offset_value);
- debugf1("%s() instance=%d block=%d name=%s\n",
- __func__, instance, block, blk->name);
+ debugf4("%s() instance=%d inst_p=%p block=#%d "
+ "block_p=%p name='%s'\n",
+ __func__, instance, inst, block,
+ blk, blk->name);
/* if there are NO attributes OR no attribute pointer
* then continue on to next block iteration
attrib_p = &dev_attrib[block*nr_instances*nr_attrib];
blk->block_attributes = attrib_p;
+ debugf4("%s() THIS BLOCK_ATTRIB=%p\n",
+ __func__, blk->block_attributes);
+
/* Initialize every user specified attribute in this
* block with the data the caller passed in
+ * Each block gets its own copy of pointers,
+ * and its unique 'value'
*/
for (attr = 0; attr < nr_attrib; attr++) {
attrib = &attrib_p[attr];
- attrib->attr = attrib_spec->attr;
- attrib->show = attrib_spec->show;
- attrib->store = attrib_spec->store;
- /* up reference this block */
- attrib->block = blk;
-
- /* bump the attrib_spec */
- attrib_spec++;
+ /* populate the unique per attrib
+ * with the code pointers and info
+ */
+ attrib->attr = attrib_spec[attr].attr;
+ attrib->show = attrib_spec[attr].show;
+ attrib->store = attrib_spec[attr].store;
+
+ attrib->block = blk; /* up link */
+
+ debugf4("%s() alloc-attrib=%p attrib_name='%s' "
+ "attrib-spec=%p spec-name=%s\n",
+ __func__, attrib, attrib->attr.name,
+ &attrib_spec[attr],
+ attrib_spec[attr].attr.name
+ );
}
}
}
struct edac_device_ctl_info *edac_dev;
struct list_head *item;
- debugf3("%s()\n", __func__);
+ debugf0("%s()\n", __func__);
list_for_each(item, &edac_device_list) {
edac_dev = list_entry(item, struct edac_device_ctl_info, link);
fail0:
edac_printk(KERN_WARNING, EDAC_MC,
"%s (%s) %s %s already assigned %d\n",
- rover->dev->bus_id, dev_name(rover),
+ dev_name(rover->dev), edac_dev_name(rover),
rover->mod_name, rover->ctl_name, rover->dev_idx);
return 1;
edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
INIT_LIST_HEAD(&edac_dev->link);
- complete(&edac_dev->removal_complete);
}
/*
*edac_device)
{
list_del_rcu(&edac_device->link);
-
- init_completion(&edac_device->removal_complete);
call_rcu(&edac_device->rcu, complete_edac_device_list_del);
- wait_for_completion(&edac_device->removal_complete);
+ rcu_barrier();
}
-/**
- * edac_device_find
- * Search for a edac_device_ctl_info structure whose index is 'idx'.
- *
- * If found, return a pointer to the structure.
- * Else return NULL.
- *
- * Caller must hold device_ctls_mutex.
- */
-struct edac_device_ctl_info *edac_device_find(int idx)
-{
- struct list_head *item;
- struct edac_device_ctl_info *edac_dev;
-
- /* Iterate over list, looking for exact match of ID */
- list_for_each(item, &edac_device_list) {
- edac_dev = list_entry(item, struct edac_device_ctl_info, link);
-
- if (edac_dev->dev_idx >= idx) {
- if (edac_dev->dev_idx == idx)
- return edac_dev;
-
- /* not on list, so terminate early */
- break;
- }
- }
-
- return NULL;
-}
-EXPORT_SYMBOL_GPL(edac_device_find);
-
/*
* edac_device_workq_function
* performs the operation scheduled by a workq request
+ *
+ * this workq is embedded within an edac_device_ctl_info
+ * structure, that needs to be polled for possible error events.
+ *
+ * This operation is to acquire the list mutex lock
+ * (thus preventing insertation or deletion)
+ * and then call the device's poll function IFF this device is
+ * running polled and there is a poll function defined.
*/
static void edac_device_workq_function(struct work_struct *work_req)
{
- struct delayed_work *d_work = (struct delayed_work *)work_req;
+ struct delayed_work *d_work = to_delayed_work(work_req);
struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
- //debugf0("%s() here and running\n", __func__);
mutex_lock(&device_ctls_mutex);
+ /* If we are being removed, bail out immediately */
+ if (edac_dev->op_state == OP_OFFLINE) {
+ mutex_unlock(&device_ctls_mutex);
+ return;
+ }
+
/* Only poll controllers that are running polled and have a check */
if ((edac_dev->op_state == OP_RUNNING_POLL) &&
(edac_dev->edac_check != NULL)) {
mutex_unlock(&device_ctls_mutex);
- /* Reschedule */
- queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
+ /* Reschedule the workq for the next time period to start again
+ * if the number of msec is for 1 sec, then adjust to the next
+ * whole one second to save timers fireing all over the period
+ * between integral seconds
+ */
+ if (edac_dev->poll_msec == 1000)
+ queue_delayed_work(edac_workqueue, &edac_dev->work,
+ round_jiffies_relative(edac_dev->delay));
+ else
+ queue_delayed_work(edac_workqueue, &edac_dev->work,
+ edac_dev->delay);
}
/*
{
debugf0("%s()\n", __func__);
+ /* take the arg 'msec' and set it into the control structure
+ * to used in the time period calculation
+ * then calc the number of jiffies that represents
+ */
edac_dev->poll_msec = msec;
- edac_dev->delay = msecs_to_jiffies(msec); /* Calc delay jiffies */
+ edac_dev->delay = msecs_to_jiffies(msec);
INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
- queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
+
+ /* optimize here for the 1 second case, which will be normal value, to
+ * fire ON the 1 second time event. This helps reduce all sorts of
+ * timers firing on sub-second basis, while they are happy
+ * to fire together on the 1 second exactly
+ */
+ if (edac_dev->poll_msec == 1000)
+ queue_delayed_work(edac_workqueue, &edac_dev->work,
+ round_jiffies_relative(edac_dev->delay));
+ else
+ queue_delayed_work(edac_workqueue, &edac_dev->work,
+ edac_dev->delay);
}
/*
/*
* edac_device_reset_delay_period
+ *
+ * need to stop any outstanding workq queued up at this time
+ * because we will be resetting the sleep time.
+ * Then restart the workq on the new delay
*/
-
void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
unsigned long value)
{
- mutex_lock(&device_ctls_mutex);
-
- /* cancel the current workq request */
+ /* cancel the current workq request, without the mutex lock */
edac_device_workq_teardown(edac_dev);
+ /* acquire the mutex before doing the workq setup */
+ mutex_lock(&device_ctls_mutex);
+
/* restart the workq request, with new delay value */
edac_device_workq_setup(edac_dev, value);
mutex_unlock(&device_ctls_mutex);
}
+/*
+ * edac_device_alloc_index: Allocate a unique device index number
+ *
+ * Return:
+ * allocated index number
+ */
+int edac_device_alloc_index(void)
+{
+ static atomic_t device_indexes = ATOMIC_INIT(0);
+
+ return atomic_inc_return(&device_indexes) - 1;
+}
+EXPORT_SYMBOL_GPL(edac_device_alloc_index);
+
/**
* edac_device_add_device: Insert the 'edac_dev' structure into the
* edac_device global list and create sysfs entries associated with
"'%s': DEV '%s' (%s)\n",
edac_dev->mod_name,
edac_dev->ctl_name,
- dev_name(edac_dev),
+ edac_dev_name(edac_dev),
edac_op_state_to_string(edac_dev->op_state));
mutex_unlock(&device_ctls_mutex);
{
struct edac_device_ctl_info *edac_dev;
- debugf0("MC: %s()\n", __func__);
+ debugf0("%s()\n", __func__);
mutex_lock(&device_ctls_mutex);
/* mark this instance as OFFLINE */
edac_dev->op_state = OP_OFFLINE;
- /* clear workq processing on this instance */
- edac_device_workq_teardown(edac_dev);
-
/* deregister from global list */
del_edac_device_from_global_list(edac_dev);
mutex_unlock(&device_ctls_mutex);
+ /* clear workq processing on this instance */
+ edac_device_workq_teardown(edac_dev);
+
/* Tear down the sysfs entries for this instance */
edac_device_remove_sysfs(edac_dev);
edac_printk(KERN_INFO, EDAC_MC,
"Removed device %d for %s %s: DEV %s\n",
edac_dev->dev_idx,
- edac_dev->mod_name, edac_dev->ctl_name, dev_name(edac_dev));
+ edac_dev->mod_name, edac_dev->ctl_name, edac_dev_name(edac_dev));
return edac_dev;
}
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