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path: root/drivers/nvdimm/core.c
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Diffstat (limited to 'drivers/nvdimm/core.c')
-rw-r--r--drivers/nvdimm/core.c88
1 files changed, 86 insertions, 2 deletions
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index c578a49867ac..fa7ab5ad0318 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -14,9 +14,12 @@
#include <linux/export.h>
#include <linux/module.h>
#include <linux/device.h>
+#include <linux/mutex.h>
#include <linux/slab.h>
#include "nd-core.h"
+static LIST_HEAD(nvdimm_bus_list);
+static DEFINE_MUTEX(nvdimm_bus_list_mutex);
static DEFINE_IDA(nd_ida);
static void nvdimm_bus_release(struct device *dev)
@@ -28,6 +31,55 @@ static void nvdimm_bus_release(struct device *dev)
kfree(nvdimm_bus);
}
+struct nvdimm_bus *to_nvdimm_bus(struct device *dev)
+{
+ struct nvdimm_bus *nvdimm_bus;
+
+ nvdimm_bus = container_of(dev, struct nvdimm_bus, dev);
+ WARN_ON(nvdimm_bus->dev.release != nvdimm_bus_release);
+ return nvdimm_bus;
+}
+EXPORT_SYMBOL_GPL(to_nvdimm_bus);
+
+struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus)
+{
+ /* struct nvdimm_bus definition is private to libnvdimm */
+ return nvdimm_bus->nd_desc;
+}
+EXPORT_SYMBOL_GPL(to_nd_desc);
+
+static const char *nvdimm_bus_provider(struct nvdimm_bus *nvdimm_bus)
+{
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+ struct device *parent = nvdimm_bus->dev.parent;
+
+ if (nd_desc->provider_name)
+ return nd_desc->provider_name;
+ else if (parent)
+ return dev_name(parent);
+ else
+ return "unknown";
+}
+
+static ssize_t provider_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
+
+ return sprintf(buf, "%s\n", nvdimm_bus_provider(nvdimm_bus));
+}
+static DEVICE_ATTR_RO(provider);
+
+static struct attribute *nvdimm_bus_attributes[] = {
+ &dev_attr_provider.attr,
+ NULL,
+};
+
+struct attribute_group nvdimm_bus_attribute_group = {
+ .attrs = nvdimm_bus_attributes,
+};
+EXPORT_SYMBOL_GPL(nvdimm_bus_attribute_group);
+
struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
struct nvdimm_bus_descriptor *nd_desc)
{
@@ -37,6 +89,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
nvdimm_bus = kzalloc(sizeof(*nvdimm_bus), GFP_KERNEL);
if (!nvdimm_bus)
return NULL;
+ INIT_LIST_HEAD(&nvdimm_bus->list);
nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
if (nvdimm_bus->id < 0) {
kfree(nvdimm_bus);
@@ -45,15 +98,26 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
nvdimm_bus->nd_desc = nd_desc;
nvdimm_bus->dev.parent = parent;
nvdimm_bus->dev.release = nvdimm_bus_release;
+ nvdimm_bus->dev.groups = nd_desc->attr_groups;
dev_set_name(&nvdimm_bus->dev, "ndbus%d", nvdimm_bus->id);
rc = device_register(&nvdimm_bus->dev);
if (rc) {
dev_dbg(&nvdimm_bus->dev, "registration failed: %d\n", rc);
- put_device(&nvdimm_bus->dev);
- return NULL;
+ goto err;
}
+ rc = nvdimm_bus_create_ndctl(nvdimm_bus);
+ if (rc)
+ goto err;
+
+ mutex_lock(&nvdimm_bus_list_mutex);
+ list_add_tail(&nvdimm_bus->list, &nvdimm_bus_list);
+ mutex_unlock(&nvdimm_bus_list_mutex);
+
return nvdimm_bus;
+ err:
+ put_device(&nvdimm_bus->dev);
+ return NULL;
}
EXPORT_SYMBOL_GPL(nvdimm_bus_register);
@@ -61,9 +125,29 @@ void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus)
{
if (!nvdimm_bus)
return;
+
+ mutex_lock(&nvdimm_bus_list_mutex);
+ list_del_init(&nvdimm_bus->list);
+ mutex_unlock(&nvdimm_bus_list_mutex);
+
+ nvdimm_bus_destroy_ndctl(nvdimm_bus);
+
device_unregister(&nvdimm_bus->dev);
}
EXPORT_SYMBOL_GPL(nvdimm_bus_unregister);
+static __init int libnvdimm_init(void)
+{
+ return nvdimm_bus_init();
+}
+
+static __exit void libnvdimm_exit(void)
+{
+ WARN_ON(!list_empty(&nvdimm_bus_list));
+ nvdimm_bus_exit();
+}
+
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Intel Corporation");
+subsys_initcall(libnvdimm_init);
+module_exit(libnvdimm_exit);