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libnvdimm, namespace: allow creation of multiple pmem-namespaces per region

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Similar to BLK regions, publish new seed namespace devices to allow
unused PMEM region capacity to be consumed by additional namespaces.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2016-09-30 15:28:27 -07:00
parent 991d9020f3
commit 98a29c39dc
3 changed files with 59 additions and 9 deletions
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48
drivers/nvdimm/namespace_devs.c
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@ -1860,16 +1860,58 @@ static struct device *nd_namespace_blk_create(struct nd_region *nd_region)
return &nsblk->common.dev;
}
void nd_region_create_blk_seed(struct nd_region *nd_region)
static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
{
struct nd_namespace_pmem *nspm;
struct resource *res;
struct device *dev;
if (!is_nd_pmem(&nd_region->dev))
return NULL;
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
if (!nspm)
return NULL;
dev = &nspm->nsio.common.dev;
dev->type = &namespace_pmem_device_type;
dev->parent = &nd_region->dev;
res = &nspm->nsio.res;
res->name = dev_name(&nd_region->dev);
res->flags = IORESOURCE_MEM;
nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
if (nspm->id < 0) {
kfree(nspm);
return NULL;
}
dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id);
dev->parent = &nd_region->dev;
dev->groups = nd_namespace_attribute_groups;
nd_namespace_pmem_set_resource(nd_region, nspm, 0);
return dev;
}
void nd_region_create_ns_seed(struct nd_region *nd_region)
{
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
nd_region->ns_seed = nd_namespace_blk_create(nd_region);
if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO)
return;
if (is_nd_blk(&nd_region->dev))
nd_region->ns_seed = nd_namespace_blk_create(nd_region);
else
nd_region->ns_seed = nd_namespace_pmem_create(nd_region);
/*
* Seed creation failures are not fatal, provisioning is simply
* disabled until memory becomes available
*/
if (!nd_region->ns_seed)
dev_err(&nd_region->dev, "failed to create blk namespace\n");
dev_err(&nd_region->dev, "failed to create %s namespace\n",
is_nd_blk(&nd_region->dev) ? "blk" : "pmem");
else
nd_device_register(nd_region->ns_seed);
}