Author: scottph
Date: Thu Jun  6 20:12:04 2019
New Revision: 348757
URL: https://svnweb.freebsd.org/changeset/base/348757

Log:
  nvdimm: Provide nvdimm location information
  
  Provide the acpi handle path as the location string for the nvdimm
  children of the nvdimm_root device.
  
  Reviewed by:  kib
  Approved by:  jhb (mentor)
  MFC after:    1 week
  Sponsored by: Intel Corporation
  Differential Revision:        https://reviews.freebsd.org/D20528

Modified:
  head/sys/dev/nvdimm/nvdimm.c

Modified: head/sys/dev/nvdimm/nvdimm.c
==============================================================================
--- head/sys/dev/nvdimm/nvdimm.c        Thu Jun  6 20:03:55 2019        
(r348756)
+++ head/sys/dev/nvdimm/nvdimm.c        Thu Jun  6 20:12:04 2019        
(r348757)
@@ -560,6 +560,24 @@ nvdimm_root_write_ivar(device_t dev, device_t child, i
        return (0);
 }
 
+static int
+nvdimm_root_child_location_str(device_t dev, device_t child, char *buf,
+    size_t buflen)
+{
+       ACPI_HANDLE handle;
+       int res;
+
+       handle = nvdimm_root_get_acpi_handle(child);
+       if (handle != NULL)
+               res = snprintf(buf, buflen, "handle=%s", acpi_name(handle));
+       else
+               res = snprintf(buf, buflen, "unknown");
+
+       if (res >= buflen)
+               return (EOVERFLOW);
+       return (0);
+}
+
 static device_method_t nvdimm_methods[] = {
        DEVMETHOD(device_probe, nvdimm_probe),
        DEVMETHOD(device_attach, nvdimm_attach),
@@ -582,6 +600,7 @@ static device_method_t nvdimm_root_methods[] = {
        DEVMETHOD(bus_add_child, bus_generic_add_child),
        DEVMETHOD(bus_read_ivar, nvdimm_root_read_ivar),
        DEVMETHOD(bus_write_ivar, nvdimm_root_write_ivar),
+       DEVMETHOD(bus_child_location_str, nvdimm_root_child_location_str),
        DEVMETHOD_END
 };
 
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