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libnvdimm: handle locked label storage areas

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Per the latest version of the "NVDIMM DSM Interface Example" [1], the
label data retrieval routine can report a "locked" status. In this case
all regions associated with that DIMM are disabled until the label area
is unlocked. Provide generic libnvdimm enabling for NVDIMMs with label
data area locking capabilities.

[1]: http://pmem.io/documents/

Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Dan Williams 2017-05-04 11:47:22 -07:00
commit 9d62ed9651
5 changed files with 39 additions and 10 deletions
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21
drivers/acpi/nfit/core.c
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@ -184,14 +184,29 @@ static int xlat_bus_status(void *buf, unsigned int cmd, u32 status)
return 0;
}
static int xlat_nvdimm_status(void *buf, unsigned int cmd, u32 status)
{
switch (cmd) {
case ND_CMD_GET_CONFIG_SIZE:
if (status >> 16 & ND_CONFIG_LOCKED)
return -EACCES;
break;
default:
break;
}
/* all other non-zero status results in an error */
if (status)
return -EIO;
return 0;
}
static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd,
u32 status)
{
if (!nvdimm)
return xlat_bus_status(buf, cmd, status);
if (status)
return -EIO;
return 0;
return xlat_nvdimm_status(buf, cmd, status);
}
int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,