Esempio n. 1
0
int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata)
{
	int rc;
	struct device *dev;
	struct btt_sb *btt_sb;
	struct nd_region *nd_region = to_nd_region(ndns->dev.parent);

	if (ndns->force_raw)
		return -ENODEV;

	nvdimm_bus_lock(&ndns->dev);
	dev = __nd_btt_create(nd_region, 0, NULL, ndns);
	nvdimm_bus_unlock(&ndns->dev);
	if (!dev)
		return -ENOMEM;
	dev_set_drvdata(dev, drvdata);
	btt_sb = kzalloc(sizeof(*btt_sb), GFP_KERNEL);
	rc = __nd_btt_probe(to_nd_btt(dev), ndns, btt_sb);
	kfree(btt_sb);
	dev_dbg(&ndns->dev, "%s: btt: %s\n", __func__,
			rc == 0 ? dev_name(dev) : "<none>");
	if (rc < 0) {
		__nd_btt_detach_ndns(to_nd_btt(dev));
		put_device(dev);
	}

	return rc;
}
Esempio n. 2
0
static ssize_t mode_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t len)
{
	struct nd_pfn *nd_pfn = to_nd_pfn(dev);
	ssize_t rc = 0;

	device_lock(dev);
	nvdimm_bus_lock(dev);
	if (dev->driver)
		rc = -EBUSY;
	else {
		size_t n = len - 1;

		if (strncmp(buf, "pmem\n", n) == 0
				|| strncmp(buf, "pmem", n) == 0) {
			/* TODO: allocate from PMEM support */
			rc = -ENOTTY;
		} else if (strncmp(buf, "ram\n", n) == 0
				|| strncmp(buf, "ram", n) == 0)
			nd_pfn->mode = PFN_MODE_RAM;
		else if (strncmp(buf, "none\n", n) == 0
				|| strncmp(buf, "none", n) == 0)
			nd_pfn->mode = PFN_MODE_NONE;
		else
			rc = -EINVAL;
	}
	dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
			rc, buf, buf[len - 1] == '\n' ? "" : "\n");
	nvdimm_bus_unlock(dev);
	device_unlock(dev);

	return rc ? rc : len;
}
Esempio n. 3
0
int nd_pfn_probe(struct nd_namespace_common *ndns, void *drvdata)
{
	int rc;
	struct device *dev;
	struct nd_pfn *nd_pfn;
	struct nd_pfn_sb *pfn_sb;
	struct nd_region *nd_region = to_nd_region(ndns->dev.parent);

	if (ndns->force_raw)
		return -ENODEV;

	nvdimm_bus_lock(&ndns->dev);
	dev = __nd_pfn_create(nd_region, NULL, PFN_MODE_NONE, ndns);
	nvdimm_bus_unlock(&ndns->dev);
	if (!dev)
		return -ENOMEM;
	dev_set_drvdata(dev, drvdata);
	pfn_sb = kzalloc(sizeof(*pfn_sb), GFP_KERNEL);
	nd_pfn = to_nd_pfn(dev);
	nd_pfn->pfn_sb = pfn_sb;
	rc = nd_pfn_validate(nd_pfn);
	nd_pfn->pfn_sb = NULL;
	kfree(pfn_sb);
	dev_dbg(&ndns->dev, "%s: pfn: %s\n", __func__,
			rc == 0 ? dev_name(dev) : "<none>");
	if (rc < 0) {
		__nd_detach_ndns(dev, &nd_pfn->ndns);
		put_device(dev);
	} else
		__nd_device_register(&nd_pfn->dev);

	return rc;
}
Esempio n. 4
0
/*
 * Upon successful probe/remove, take/release a reference on the
 * associated interleave set (if present), and plant new btt + namespace
 * seeds.  Also, on the removal of a BLK region, notify the provider to
 * disable the region.
 */
static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
		struct device *dev, bool probe)
{
	struct nd_region *nd_region;

	if (!probe && (is_nd_pmem(dev) || is_nd_blk(dev))) {
		int i;

		nd_region = to_nd_region(dev);
		for (i = 0; i < nd_region->ndr_mappings; i++) {
			struct nd_mapping *nd_mapping = &nd_region->mapping[i];
			struct nvdimm_drvdata *ndd = nd_mapping->ndd;
			struct nvdimm *nvdimm = nd_mapping->nvdimm;

			kfree(nd_mapping->labels);
			nd_mapping->labels = NULL;
			put_ndd(ndd);
			nd_mapping->ndd = NULL;
			if (ndd)
				atomic_dec(&nvdimm->busy);
		}

		if (is_nd_pmem(dev))
			return;

		to_nd_blk_region(dev)->disable(nvdimm_bus, dev);
	}
	if (dev->parent && is_nd_blk(dev->parent) && probe) {
		nd_region = to_nd_region(dev->parent);
		nvdimm_bus_lock(dev);
		if (nd_region->ns_seed == dev)
			nd_region_create_blk_seed(nd_region);
		nvdimm_bus_unlock(dev);
	}
	if (is_nd_btt(dev) && probe) {
		struct nd_btt *nd_btt = to_nd_btt(dev);

		nd_region = to_nd_region(dev->parent);
		nvdimm_bus_lock(dev);
		if (nd_region->btt_seed == dev)
			nd_region_create_btt_seed(nd_region);
		if (nd_region->ns_seed == &nd_btt->ndns->dev &&
				is_nd_blk(dev->parent))
			nd_region_create_blk_seed(nd_region);
		nvdimm_bus_unlock(dev);
	}
}
Esempio n. 5
0
resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk)
{
	resource_size_t size;

	nvdimm_bus_lock(&nsblk->common.dev);
	size = __nd_namespace_blk_validate(nsblk);
	nvdimm_bus_unlock(&nsblk->common.dev);

	return size;
}
Esempio n. 6
0
File: dimm.c Progetto: 020gzh/linux
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;
}
Esempio n. 7
0
static ssize_t namespace_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nd_pfn *nd_pfn = to_nd_pfn(dev);
	ssize_t rc;

	nvdimm_bus_lock(dev);
	rc = sprintf(buf, "%s\n", nd_pfn->ndns
			? dev_name(&nd_pfn->ndns->dev) : "");
	nvdimm_bus_unlock(dev);
	return rc;
}
Esempio n. 8
0
static ssize_t state_show(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct nvdimm *nvdimm = to_nvdimm(dev);

	/*
	 * The state may be in the process of changing, userspace should
	 * quiesce probing if it wants a static answer
	 */
	nvdimm_bus_lock(dev);
	nvdimm_bus_unlock(dev);
	return sprintf(buf, "%s\n", atomic_read(&nvdimm->busy)
			? "active" : "idle");
}
Esempio n. 9
0
static ssize_t namespace_seed_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nd_region *nd_region = to_nd_region(dev);
	ssize_t rc;

	nvdimm_bus_lock(dev);
	if (nd_region->ns_seed)
		rc = sprintf(buf, "%s\n", dev_name(nd_region->ns_seed));
	else
		rc = sprintf(buf, "\n");
	nvdimm_bus_unlock(dev);
	return rc;
}
Esempio n. 10
0
static int nd_region_remove(struct device *dev)
{
	struct nd_region *nd_region = to_nd_region(dev);

	/* flush attribute readers and disable */
	nvdimm_bus_lock(dev);
	nd_region->ns_seed = NULL;
	nd_region->btt_seed = NULL;
	nd_region->pfn_seed = NULL;
	dev_set_drvdata(dev, NULL);
	nvdimm_bus_unlock(dev);

	device_for_each_child(dev, NULL, child_unregister);
	return 0;
}
Esempio n. 11
0
static ssize_t namespace_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t len)
{
	ssize_t rc;

	nvdimm_bus_lock(dev);
	device_lock(dev);
	rc = __namespace_store(dev, attr, buf, len);
	dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
			rc, buf, buf[len - 1] == '\n' ? "" : "\n");
	device_unlock(dev);
	nvdimm_bus_unlock(dev);

	return rc;
}
Esempio n. 12
0
static ssize_t init_namespaces_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nd_region_namespaces *num_ns = dev_get_drvdata(dev);
	ssize_t rc;

	nvdimm_bus_lock(dev);
	if (num_ns)
		rc = sprintf(buf, "%d/%d\n", num_ns->active, num_ns->count);
	else
		rc = -ENXIO;
	nvdimm_bus_unlock(dev);

	return rc;
}
Esempio n. 13
0
File: dimm.c Progetto: 020gzh/linux
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;
}
Esempio n. 14
0
static ssize_t align_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t len)
{
	struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
	ssize_t rc;

	device_lock(dev);
	nvdimm_bus_lock(dev);
	rc = nd_size_select_store(dev, buf, &nd_pfn->align,
			nd_pfn_supported_alignments());
	dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
			rc, buf, buf[len - 1] == '\n' ? "" : "\n");
	nvdimm_bus_unlock(dev);
	device_unlock(dev);

	return rc ? rc : len;
}
Esempio n. 15
0
void nvdimm_drvdata_release(struct kref *kref)
{
	struct nvdimm_drvdata *ndd = container_of(kref, typeof(*ndd), kref);
	struct device *dev = ndd->dev;
	struct resource *res, *_r;

	dev_dbg(dev, "%s\n", __func__);

	nvdimm_bus_lock(dev);
	for_each_dpa_resource_safe(ndd, res, _r)
		nvdimm_free_dpa(ndd, res);
	nvdimm_bus_unlock(dev);

	kvfree(ndd->data);
	kfree(ndd);
	put_device(dev);
}
Esempio n. 16
0
static ssize_t sector_size_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t len)
{
	struct nd_btt *nd_btt = to_nd_btt(dev);
	ssize_t rc;

	device_lock(dev);
	nvdimm_bus_lock(dev);
	rc = nd_sector_size_store(dev, buf, &nd_btt->lbasize,
			btt_lbasize_supported);
	dev_dbg(dev, "%s: result: %zd wrote: %s%s", __func__,
			rc, buf, buf[len - 1] == '\n' ? "" : "\n");
	nvdimm_bus_unlock(dev);
	device_unlock(dev);

	return rc ? rc : len;
}
Esempio n. 17
0
static ssize_t alt_name_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t len)
{
	struct nd_region *nd_region = to_nd_region(dev->parent);
	ssize_t rc;

	device_lock(dev);
	nvdimm_bus_lock(dev);
	wait_nvdimm_bus_probe_idle(dev);
	rc = __alt_name_store(dev, buf, len);
	if (rc >= 0)
		rc = nd_namespace_label_update(nd_region, dev);
	dev_dbg(dev, "%s: %s(%zd)\n", __func__, rc < 0 ? "fail " : "", rc);
	nvdimm_bus_unlock(dev);
	device_unlock(dev);

	return rc < 0 ? rc : len;
}
Esempio n. 18
0
static ssize_t available_size_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nd_region *nd_region = to_nd_region(dev);
	unsigned long long available = 0;

	/*
	 * Flush in-flight updates and grab a snapshot of the available
	 * size.  Of course, this value is potentially invalidated the
	 * memory nvdimm_bus_lock() is dropped, but that's userspace's
	 * problem to not race itself.
	 */
	nvdimm_bus_lock(dev);
	wait_nvdimm_bus_probe_idle(dev);
	available = nd_region_available_dpa(nd_region);
	nvdimm_bus_unlock(dev);

	return sprintf(buf, "%llu\n", available);
}
Esempio n. 19
0
static ssize_t available_slots_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
	ssize_t rc;
	u32 nfree;

	if (!ndd)
		return -ENXIO;

	nvdimm_bus_lock(dev);
	nfree = nd_label_nfree(ndd);
	if (nfree - 1 > nfree) {
		dev_WARN_ONCE(dev, 1, "we ate our last label?\n");
		nfree = 0;
	} else
		nfree--;
	rc = sprintf(buf, "%d\n", nfree);
	nvdimm_bus_unlock(dev);
	return rc;
}
Esempio n. 20
0
int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns)
{
	int rc;
	struct nd_pfn *nd_pfn;
	struct device *pfn_dev;
	struct nd_pfn_sb *pfn_sb;
	struct nd_region *nd_region = to_nd_region(ndns->dev.parent);

	if (ndns->force_raw)
		return -ENODEV;

	switch (ndns->claim_class) {
	case NVDIMM_CCLASS_NONE:
	case NVDIMM_CCLASS_PFN:
		break;
	default:
		return -ENODEV;
	}

	nvdimm_bus_lock(&ndns->dev);
	nd_pfn = nd_pfn_alloc(nd_region);
	pfn_dev = nd_pfn_devinit(nd_pfn, ndns);
	nvdimm_bus_unlock(&ndns->dev);
	if (!pfn_dev)
		return -ENOMEM;
	pfn_sb = devm_kzalloc(dev, sizeof(*pfn_sb), GFP_KERNEL);
	nd_pfn = to_nd_pfn(pfn_dev);
	nd_pfn->pfn_sb = pfn_sb;
	rc = nd_pfn_validate(nd_pfn, PFN_SIG);
	dev_dbg(dev, "%s: pfn: %s\n", __func__,
			rc == 0 ? dev_name(pfn_dev) : "<none>");
	if (rc < 0) {
		nd_detach_ndns(pfn_dev, &nd_pfn->ndns);
		put_device(pfn_dev);
	} else
		__nd_device_register(pfn_dev);

	return rc;
}
Esempio n. 21
0
static int nvdimm_probe(struct device *dev)
{
	struct nvdimm_drvdata *ndd;
	int 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_aliasing(dev);
	}
	nvdimm_bus_unlock(dev);

	if (rc)
		goto err;

	return 0;

 err:
	put_ndd(ndd);
	return rc;
}