summaryrefslogtreecommitdiff
path: root/drivers/nvdimm/pfn_devs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/nvdimm/pfn_devs.c')
-rw-r--r--drivers/nvdimm/pfn_devs.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index ae81a2f1da50..254d3bc13f70 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -205,11 +205,67 @@ static ssize_t namespace_store(struct device *dev,
}
static DEVICE_ATTR_RW(namespace);
+static ssize_t resource_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_pfn *nd_pfn = to_nd_pfn(dev);
+ ssize_t rc;
+
+ device_lock(dev);
+ if (dev->driver) {
+ struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
+ u64 offset = __le64_to_cpu(pfn_sb->dataoff);
+ struct nd_namespace_common *ndns = nd_pfn->ndns;
+ u32 start_pad = __le32_to_cpu(pfn_sb->start_pad);
+ struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
+
+ rc = sprintf(buf, "%#llx\n", (unsigned long long) nsio->res.start
+ + start_pad + offset);
+ } else {
+ /* no address to convey if the pfn instance is disabled */
+ rc = -ENXIO;
+ }
+ device_unlock(dev);
+
+ return rc;
+}
+static DEVICE_ATTR_RO(resource);
+
+static ssize_t size_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_pfn *nd_pfn = to_nd_pfn(dev);
+ ssize_t rc;
+
+ device_lock(dev);
+ if (dev->driver) {
+ struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
+ u64 offset = __le64_to_cpu(pfn_sb->dataoff);
+ struct nd_namespace_common *ndns = nd_pfn->ndns;
+ u32 start_pad = __le32_to_cpu(pfn_sb->start_pad);
+ u32 end_trunc = __le32_to_cpu(pfn_sb->end_trunc);
+ struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
+
+ rc = sprintf(buf, "%llu\n", (unsigned long long)
+ resource_size(&nsio->res) - start_pad
+ - end_trunc - offset);
+ } else {
+ /* no size to convey if the pfn instance is disabled */
+ rc = -ENXIO;
+ }
+ device_unlock(dev);
+
+ return rc;
+}
+static DEVICE_ATTR_RO(size);
+
static struct attribute *nd_pfn_attributes[] = {
&dev_attr_mode.attr,
&dev_attr_namespace.attr,
&dev_attr_uuid.attr,
&dev_attr_align.attr,
+ &dev_attr_resource.attr,
+ &dev_attr_size.attr,
NULL,
};
@@ -299,6 +355,11 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn)
if (memcmp(pfn_sb->parent_uuid, parent_uuid, 16) != 0)
return -ENODEV;
+ if (__le16_to_cpu(pfn_sb->version_minor) < 1) {
+ pfn_sb->start_pad = 0;
+ pfn_sb->end_trunc = 0;
+ }
+
switch (le32_to_cpu(pfn_sb->mode)) {
case PFN_MODE_RAM:
case PFN_MODE_PMEM: