libnvdimm, namespace: allow creation of multiple pmem-namespaces per region
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>
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index fa51d75..3509cff 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1860,16 +1860,58 @@
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);
}