These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / nvdimm / dimm.c

diff --git a/kernel/drivers/nvdimm/dimm.c b/kernel/drivers/nvdimm/dimm.c
new file mode 100644 (file)
index 0000000..71d12bb
--- /dev/null
+++ b/kernel/drivers/nvdimm/dimm.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/sizes.h>
+#include <linux/ndctl.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/nd.h>
+#include "label.h"
+#include "nd.h"
+
+static int nvdimm_probe(struct device *dev)
+{
+       struct nvdimm_drvdata *ndd;
+       int rc;
+
+       ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
+       if (!ndd)
+               return -ENOMEM;
+
+       dev_set_drvdata(dev, ndd);
+       ndd->dpa.name = dev_name(dev);
+       ndd->ns_current = -1;
+       ndd->ns_next = -1;
+       ndd->dpa.start = 0;
+       ndd->dpa.end = -1;
+       ndd->dev = dev;
+       get_device(dev);
+       kref_init(&ndd->kref);
+
+       rc = nvdimm_init_nsarea(ndd);
+       if (rc)
+               goto err;
+
+       rc = nvdimm_init_config_data(ndd);
+       if (rc)
+               goto err;
+
+       dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
+
+       nvdimm_bus_lock(dev);
+       ndd->ns_current = nd_label_validate(ndd);
+       ndd->ns_next = nd_label_next_nsindex(ndd->ns_current);
+       nd_label_copy(ndd, to_next_namespace_index(ndd),
+                       to_current_namespace_index(ndd));
+       rc = nd_label_reserve_dpa(ndd);
+       nvdimm_bus_unlock(dev);
+
+       if (rc)
+               goto err;
+
+       return 0;
+
+ err:
+       put_ndd(ndd);
+       return rc;
+}
+
+static int nvdimm_remove(struct device *dev)
+{
+       struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
+
+       nvdimm_bus_lock(dev);
+       dev_set_drvdata(dev, NULL);
+       nvdimm_bus_unlock(dev);
+       put_ndd(ndd);
+
+       return 0;
+}
+
+static struct nd_device_driver nvdimm_driver = {
+       .probe = nvdimm_probe,
+       .remove = nvdimm_remove,
+       .drv = {
+               .name = "nvdimm",
+       },
+       .type = ND_DRIVER_DIMM,
+};
+
+int __init nvdimm_init(void)
+{
+       return nd_driver_register(&nvdimm_driver);
+}
+
+void nvdimm_exit(void)
+{
+       driver_unregister(&nvdimm_driver.drv);
+}
+
+MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM);