#include <linux/highmem.h>
#include <linux/timer.h>
#include <linux/slab.h>
+#include <linux/jiffies.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sysdev.h>
#include "edac_core.h"
#include "edac_module.h"
-/* lock to memory controller's control array */
+/* lock to memory controller's control array 'edac_device_list' */
static DECLARE_MUTEX(device_ctls_mutex);
static struct list_head edac_device_list = LIST_HEAD_INIT(edac_device_list);
-static inline void lock_device_list(void)
-{
- down(&device_ctls_mutex);
-}
-
-static inline void unlock_device_list(void)
-{
- up(&device_ctls_mutex);
-}
-
#ifdef CONFIG_EDAC_DEBUG
static void edac_device_dump_device(struct edac_device_ctl_info *edac_dev)
{
#endif /* CONFIG_EDAC_DEBUG */
/*
- * The alloc() and free() functions for the 'edac_device' control info
- * structure. A MC driver will allocate one of these for each edac_device
- * it is going to control/register with the EDAC CORE.
+ * edac_device_alloc_ctl_info()
+ * Allocate a new edac device control info structure
+ *
+ * The control structure is allocated in complete chunk
+ * from the OS. It is in turn sub allocated to the
+ * various objects that compose the struture
+ *
+ * The structure has a 'nr_instance' array within itself.
+ * Each instance represents a major component
+ * Example: L1 cache and L2 cache are 2 instance components
+ *
+ * Within each instance is an array of 'nr_blocks' blockoffsets
*/
struct edac_device_ctl_info *edac_device_alloc_ctl_info(
unsigned sz_private,
- char *edac_device_name,
- unsigned nr_instances,
- char *edac_block_name,
- unsigned nr_blocks,
- unsigned offset_value,
- struct edac_attrib_spec
- *attrib_spec,
- unsigned nr_attribs)
+ char *edac_device_name, unsigned nr_instances,
+ char *edac_block_name, unsigned nr_blocks,
+ unsigned offset_value, /* zero, 1, or other based offset */
+ struct edac_attrib_spec *attrib_spec, unsigned nr_attribs)
{
struct edac_device_ctl_info *dev_ctl;
struct edac_device_instance *dev_inst, *inst;
* to be at least as stringent as what the compiler would
* provide if we could simply hardcode everything into a single struct.
*/
- dev_ctl = (struct edac_device_ctl_info *)0;
+ dev_ctl = (struct edac_device_ctl_info *)NULL;
/* Calc the 'end' offset past the ctl_info structure */
dev_inst = (struct edac_device_instance *)
total_size = ((unsigned long)pvt) + sz_private;
/* Allocate the amount of memory for the set of control structures */
- if ((dev_ctl = kmalloc(total_size, GFP_KERNEL)) == NULL)
+ dev_ctl = kzalloc(total_size, GFP_KERNEL);
+ if (dev_ctl == NULL)
return NULL;
/* Adjust pointers so they point within the memory we just allocated
(((char *)dev_ctl) + ((unsigned long)dev_attrib));
pvt = sz_private ? (((char *)dev_ctl) + ((unsigned long)pvt)) : NULL;
- memset(dev_ctl, 0, total_size); /* clear all fields */
dev_ctl->nr_instances = nr_instances;
dev_ctl->instances = dev_inst;
dev_ctl->pvt_info = pvt;
- /* Name of this edac device, ensure null terminated */
- snprintf(dev_ctl->name, sizeof(dev_ctl->name), "%s", edac_device_name);
- dev_ctl->name[sizeof(dev_ctl->name) - 1] = '\0';
+ /* Name of this edac device */
+ snprintf(dev_ctl->name,sizeof(dev_ctl->name),"%s",edac_device_name);
/* Initialize every Instance */
for (instance = 0; instance < nr_instances; instance++) {
/* name of this instance */
snprintf(inst->name, sizeof(inst->name),
"%s%u", edac_device_name, instance);
- inst->name[sizeof(inst->name) - 1] = '\0';
/* Initialize every block in each instance */
for (block = 0; block < nr_blocks; block++) {
blk->attribs = attrib_p;
snprintf(blk->name, sizeof(blk->name),
"%s%d", edac_block_name, block+offset_value);
- blk->name[sizeof(blk->name) - 1] = '\0';
debugf1("%s() instance=%d block=%d name=%s\n",
__func__, instance, block, blk->name);
return dev_ctl;
}
-
EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
/*
{
kfree(ctl_info);
}
-
EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
/*
* find_edac_device_by_dev
* scans the edac_device list for a specific 'struct device *'
+ *
+ * lock to be held prior to call: device_ctls_mutex
+ *
+ * Return:
+ * pointer to control structure managing 'dev'
+ * NULL if not found on list
*/
static struct edac_device_ctl_info *find_edac_device_by_dev(struct device *dev)
{
* add_edac_dev_to_global_list
* Before calling this function, caller must
* assign a unique value to edac_dev->dev_idx.
+ *
+ * lock to be held prior to call: device_ctls_mutex
+ *
* Return:
* 0 on success
* 1 on failure.
insert_before = &edac_device_list;
/* Determine if already on the list */
- if (unlikely((rover = find_edac_device_by_dev(edac_dev->dev)) != NULL))
+ rover = find_edac_device_by_dev(edac_dev->dev);
+ if (unlikely(rover != NULL))
goto fail0;
/* Insert in ascending order by 'dev_idx', so find position */
/*
* complete_edac_device_list_del
+ *
+ * callback function when reference count is zero
*/
static void complete_edac_device_list_del(struct rcu_head *head)
{
/*
* del_edac_device_from_global_list
+ *
+ * remove the RCU, setup for a callback call, then wait for the
+ * callback to occur
*/
static void del_edac_device_from_global_list(struct edac_device_ctl_info
*edac_device)
return NULL;
}
-
-EXPORT_SYMBOL(edac_device_find);
+EXPORT_SYMBOL_GPL(edac_device_find);
/*
* edac_device_workq_function
struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
//debugf0("%s() here and running\n", __func__);
- lock_device_list();
+ down(&device_ctls_mutex);
/* Only poll controllers that are running polled and have a check */
if ((edac_dev->op_state == OP_RUNNING_POLL) &&
edac_dev->edac_check(edac_dev);
}
- unlock_device_list();
+ up(&device_ctls_mutex);
/* Reschedule */
queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
debugf0("%s()\n", __func__);
edac_dev->poll_msec = msec;
- edac_calc_delay(edac_dev); /* Calc delay jiffies */
+ edac_dev->delay = msecs_to_jiffies(msec); /* Calc delay jiffies */
INIT_DELAYED_WORK(&edac_dev->work, edac_device_workq_function);
queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
unsigned long value)
{
- lock_device_list();
+ down(&device_ctls_mutex);
/* cancel the current workq request */
edac_device_workq_teardown(edac_dev);
/* restart the workq request, with new delay value */
edac_device_workq_setup(edac_dev, value);
- unlock_device_list();
+ up(&device_ctls_mutex);
}
/**
if (edac_debug_level >= 3)
edac_device_dump_device(edac_dev);
#endif
- lock_device_list();
+ down(&device_ctls_mutex);
if (add_edac_dev_to_global_list(edac_dev))
goto fail0;
dev_name(edac_dev),
edac_op_state_toString(edac_dev->op_state));
- unlock_device_list();
+ up(&device_ctls_mutex);
return 0;
fail1:
del_edac_device_from_global_list(edac_dev);
fail0:
- unlock_device_list();
+ up(&device_ctls_mutex);
return 1;
}
-
EXPORT_SYMBOL_GPL(edac_device_add_device);
/**
debugf0("MC: %s()\n", __func__);
- lock_device_list();
+ down(&device_ctls_mutex);
- if ((edac_dev = find_edac_device_by_dev(dev)) == NULL) {
- unlock_device_list();
+ /* Find the structure on the list, if not there, then leave */
+ edac_dev = find_edac_device_by_dev(dev);
+ if (edac_dev == NULL) {
+ up(&device_ctls_mutex);
return NULL;
}
/* deregister from global list */
del_edac_device_from_global_list(edac_dev);
- unlock_device_list();
+ up(&device_ctls_mutex);
edac_printk(KERN_INFO, EDAC_MC,
"Removed device %d for %s %s: DEV %s\n",
return edac_dev;
}
-
EXPORT_SYMBOL_GPL(edac_device_del_device);
static inline int edac_device_get_log_ce(struct edac_device_ctl_info *edac_dev)
edac_dev->ctl_name, instance->name,
block ? block->name : "N/A", msg);
}
-
EXPORT_SYMBOL_GPL(edac_device_handle_ce);
/*
edac_dev->ctl_name, instance->name,
block ? block->name : "N/A", msg);
}
-
EXPORT_SYMBOL_GPL(edac_device_handle_ue);
/* instance specific attribute structure */
struct instance_attribute {
struct attribute attr;
- ssize_t(*show) (struct edac_device_instance *, char *);
- ssize_t(*store) (struct edac_device_instance *, const char *, size_t);
+ ssize_t(*show) (struct edac_device_instance *, char *);
+ ssize_t(*store) (struct edac_device_instance *, const char *, size_t);
};
/* Function to 'show' fields from the edac_dev 'instance' structure */
for (i = 0; i < instance->nr_blocks; i++) {
err = edac_device_create_block(edac_dev, instance, i);
if (err) {
- for (j = 0; j < i; j++) {
+ for (j = 0; j < i; j++)
edac_device_delete_block(edac_dev, instance, j);
- }
return err;
}
}
instance = &edac_dev->instances[idx];
/* unregister all blocks in this instance */
- for (i = 0; i < instance->nr_blocks; i++) {
+ for (i = 0; i < instance->nr_blocks; i++)
edac_device_delete_block(edac_dev, instance, i);
- }
/* unregister this instance's kobject */
init_completion(&instance->kobj_complete);
err = edac_device_create_instance(edac_dev, i);
if (err) {
/* unwind previous instances on error */
- for (j = 0; j < i; j++) {
+ for (j = 0; j < i; j++)
edac_device_delete_instance(edac_dev, j);
- }
return err;
}
}
int i;
/* iterate over creation of the instances */
- for (i = 0; i < edac_dev->nr_instances; i++) {
+ for (i = 0; i < edac_dev->nr_instances; i++)
edac_device_delete_instance(edac_dev, i);
- }
}
/******************* edac_dev sysfs ctor/dtor code *************/
while (sysfs_attrib->attr.name != NULL) {
err = sysfs_create_file(&edac_dev->kobj,
(struct attribute*) sysfs_attrib);
- if (err) {
+ if (err)
return err;
- }
sysfs_attrib++;
}
/* Create the first level instance directories */
err = edac_device_create_instances(edac_dev);
- if (err) {
+ if (err)
goto err_remove_link;
- }
return 0;
projects / firefly-linux-kernel-4.4.55.git / commitdiff