libnvdimm: Add DSM support for Address Range Scrub commands
Add support for the three ARS DSM commands:
- Query ARS Capabilities - Queries the firmware to check if a given
range supports scrub, and if so, which type (persistent vs. volatile)
- Start ARS - Starts a scrub for a given range/type
- Query ARS Status - Checks status of a previously started scrub, and
provides the error logs if any.
The commands are described by the example DSM spec at:
http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf
Also add these commands to the nfit_test test framework, and return
canned data.
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
index e94bc20..5b4a4be 100644
--- a/include/uapi/linux/ndctl.h
+++ b/include/uapi/linux/ndctl.h
@@ -111,6 +111,11 @@
ND_CMD_VENDOR = 9,
};
+enum {
+ ND_ARS_VOLATILE = 1,
+ ND_ARS_PERSISTENT = 2,
+};
+
static inline const char *nvdimm_bus_cmd_name(unsigned cmd)
{
static const char * const names[] = {
@@ -194,4 +199,9 @@
enum {
ND_MIN_NAMESPACE_SIZE = 0x00400000,
};
+
+enum ars_masks {
+ ARS_STATUS_MASK = 0x0000FFFF,
+ ARS_EXT_STATUS_SHIFT = 16,
+};
#endif /* __NDCTL_H__ */