forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
145 lines
3.1 KiB
145 lines
3.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
|
*/ |
|
#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; |
|
|
|
rc = nvdimm_security_setup_events(dev); |
|
if (rc < 0) { |
|
dev_err(dev, "security event setup failed: %d\n", rc); |
|
return rc; |
|
} |
|
|
|
rc = nvdimm_check_config_data(dev); |
|
if (rc) { |
|
/* not required for non-aliased nvdimm, ex. NVDIMM-N */ |
|
if (rc == -ENOTTY) |
|
rc = 0; |
|
return rc; |
|
} |
|
|
|
/* |
|
* The locked status bit reflects explicit status codes from the |
|
* label reading commands, revalidate it each time the driver is |
|
* activated and re-reads the label area. |
|
*/ |
|
nvdimm_clear_locked(dev); |
|
|
|
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); |
|
|
|
/* |
|
* Attempt to unlock, if the DIMM supports security commands, |
|
* otherwise the locked indication is determined by explicit |
|
* status codes from the label reading commands. |
|
*/ |
|
rc = nvdimm_security_unlock(dev); |
|
if (rc < 0) |
|
dev_dbg(dev, "failed to unlock dimm: %d\n", rc); |
|
|
|
|
|
/* |
|
* EACCES failures reading the namespace label-area-properties |
|
* are interpreted as the DIMM capacity being locked but the |
|
* namespace labels themselves being accessible. |
|
*/ |
|
rc = nvdimm_init_nsarea(ndd); |
|
if (rc == -EACCES) { |
|
/* |
|
* See nvdimm_namespace_common_probe() where we fail to |
|
* allow namespaces to probe while the DIMM is locked, |
|
* but we do allow for namespace enumeration. |
|
*/ |
|
nvdimm_set_locked(dev); |
|
rc = 0; |
|
} |
|
if (rc) |
|
goto err; |
|
|
|
/* |
|
* EACCES failures reading the namespace label-data are |
|
* interpreted as the label area being locked in addition to the |
|
* DIMM capacity. We fail the dimm probe to prevent regions from |
|
* attempting to parse the label area. |
|
*/ |
|
rc = nd_label_data_init(ndd); |
|
if (rc == -EACCES) |
|
nvdimm_set_locked(dev); |
|
if (rc) |
|
goto err; |
|
|
|
dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size); |
|
|
|
nvdimm_bus_lock(dev); |
|
if (ndd->ns_current >= 0) { |
|
rc = nd_label_reserve_dpa(ndd); |
|
if (rc == 0) |
|
nvdimm_set_labeling(dev); |
|
} |
|
nvdimm_bus_unlock(dev); |
|
|
|
if (rc) |
|
goto err; |
|
|
|
return 0; |
|
|
|
err: |
|
put_ndd(ndd); |
|
return rc; |
|
} |
|
|
|
static void 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); |
|
} |
|
|
|
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);
|
|
|