[linux-2.6-block.git] / drivers / nvdimm / dimm.c

/*
 * 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);
Commit	Line	Data
4d88a97a DW	1	/*
	2	* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of version 2 of the GNU General Public License as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*/
	13	#include <linux/vmalloc.h>
	14	#include <linux/module.h>
	15	#include <linux/device.h>
	16	#include <linux/sizes.h>
	17	#include <linux/ndctl.h>
	18	#include <linux/slab.h>
	19	#include <linux/mm.h>
	20	#include <linux/nd.h>
4a826c83	21	#include "label.h"
4d88a97a DW	22	#include "nd.h"
4d88a97a DW	23
4d88a97a DW	24	static int nvdimm_probe(struct device *dev)
	25	{
	26	struct nvdimm_drvdata *ndd;
	27	int rc;
	28
	29	ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
	30	if (!ndd)
	31	return -ENOMEM;
	32
	33	dev_set_drvdata(dev, ndd);
4a826c83 DW	34	ndd->dpa.name = dev_name(dev);
	35	ndd->ns_current = -1;
	36	ndd->ns_next = -1;
	37	ndd->dpa.start = 0;
	38	ndd->dpa.end = -1;
4d88a97a	39	ndd->dev = dev;
bf9bccc1 DW	40	get_device(dev);
bf9bccc1 DW	41	kref_init(&ndd->kref);
4d88a97a DW	42
	43	rc = nvdimm_init_nsarea(ndd);
	44	if (rc)
	45	goto err;
	46
	47	rc = nvdimm_init_config_data(ndd);
	48	if (rc)
	49	goto err;
	50
	51	dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
	52
4a826c83 DW	53	nvdimm_bus_lock(dev);
	54	ndd->ns_current = nd_label_validate(ndd);
	55	ndd->ns_next = nd_label_next_nsindex(ndd->ns_current);
	56	nd_label_copy(ndd, to_next_namespace_index(ndd),
	57	to_current_namespace_index(ndd));
	58	rc = nd_label_reserve_dpa(ndd);
	59	nvdimm_bus_unlock(dev);
	60
	61	if (rc)
	62	goto err;
	63
4d88a97a DW	64	return 0;
	65
	66	err:
bf9bccc1	67	put_ndd(ndd);
4d88a97a DW	68	return rc;
	69	}
	70
	71	static int nvdimm_remove(struct device *dev)
	72	{
	73	struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
	74
4a826c83 DW	75	nvdimm_bus_lock(dev);
4a826c83 DW	76	dev_set_drvdata(dev, NULL);
4a826c83	77	nvdimm_bus_unlock(dev);
bf9bccc1	78	put_ndd(ndd);
4d88a97a DW	79
	80	return 0;
	81	}
	82
	83	static struct nd_device_driver nvdimm_driver = {
	84	.probe = nvdimm_probe,
	85	.remove = nvdimm_remove,
	86	.drv = {
	87	.name = "nvdimm",
	88	},
	89	.type = ND_DRIVER_DIMM,
	90	};
	91
	92	int __init nvdimm_init(void)
	93	{
	94	return nd_driver_register(&nvdimm_driver);
	95	}
	96
3d88002e	97	void nvdimm_exit(void)
4d88a97a DW	98	{
	99	driver_unregister(&nvdimm_driver.drv);
	100	}
	101
	102	MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM);