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authorDan Williams <dan.j.williams@intel.com>2015-07-31 00:57:47 +0300
committerDan Williams <dan.j.williams@intel.com>2015-08-29 06:39:36 +0300
commite1455744b27c9e6115c3508a7b2902157c2c4347 (patch)
tree6bfbc5d78269c9389f5bcfc1adc35d4f7f2e6fa4 /drivers/nvdimm/namespace_devs.c
parent96601adb745186ccbcf5b078d4756f13381ec2af (diff)
downloadlinux-e1455744b27c9e6115c3508a7b2902157c2c4347.tar.xz
libnvdimm, pfn: 'struct page' provider infrastructure
Implement the base infrastructure for libnvdimm PFN devices. Similar to BTT devices they take a namespace as a backing device and layer functionality on top. In this case the functionality is reserving space for an array of 'struct page' entries to be handed out through pfn_to_page(). For now this is just the basic libnvdimm-device-model for configuring the base PFN device. As the namespace claiming mechanism for PFN devices is mostly identical to BTT devices drivers/nvdimm/claim.c is created to house the common bits. Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/namespace_devs.c')
-rw-r--r--drivers/nvdimm/namespace_devs.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index b18ffea9d85b..9303ca29be9b 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -82,8 +82,16 @@ const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
struct nd_region *nd_region = to_nd_region(ndns->dev.parent);
const char *suffix = "";
- if (ndns->claim && is_nd_btt(ndns->claim))
- suffix = "s";
+ if (ndns->claim) {
+ if (is_nd_btt(ndns->claim))
+ suffix = "s";
+ else if (is_nd_pfn(ndns->claim))
+ suffix = "m";
+ else
+ dev_WARN_ONCE(&ndns->dev, 1,
+ "unknown claim type by %s\n",
+ dev_name(ndns->claim));
+ }
if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev))
sprintf(name, "pmem%d%s", nd_region->id, suffix);
@@ -1255,12 +1263,22 @@ static const struct attribute_group *nd_namespace_attribute_groups[] = {
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev)
{
struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL;
+ struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL;
struct nd_namespace_common *ndns;
resource_size_t size;
- if (nd_btt) {
- ndns = nd_btt->ndns;
- if (!ndns)
+ if (nd_btt || nd_pfn) {
+ struct device *host = NULL;
+
+ if (nd_btt) {
+ host = &nd_btt->dev;
+ ndns = nd_btt->ndns;
+ } else if (nd_pfn) {
+ host = &nd_pfn->dev;
+ ndns = nd_pfn->ndns;
+ }
+
+ if (!ndns || !host)
return ERR_PTR(-ENODEV);
/*
@@ -1271,12 +1289,12 @@ struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev)
device_unlock(&ndns->dev);
if (ndns->dev.driver) {
dev_dbg(&ndns->dev, "is active, can't bind %s\n",
- dev_name(&nd_btt->dev));
+ dev_name(host));
return ERR_PTR(-EBUSY);
}
- if (dev_WARN_ONCE(&ndns->dev, ndns->claim != &nd_btt->dev,
+ if (dev_WARN_ONCE(&ndns->dev, ndns->claim != host,
"host (%s) vs claim (%s) mismatch\n",
- dev_name(&nd_btt->dev),
+ dev_name(host),
dev_name(ndns->claim)))
return ERR_PTR(-ENXIO);
} else {