diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2015-05-31 14:41:48 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
| commit | 4d88a97aa9e8cfa6460aab119c5da60ad2267423 (patch) | |
| tree | f96989f3240720c647a48dd493d895b58b052b10 /drivers/acpi/nfit.c | |
| parent | 62232e45f4a265abb43f0acf16e58f5d0b6e1ec9 (diff) | |
libnvdimm, nvdimm: dimm driver and base libnvdimm device-driver infrastructure
* Implement the device-model infrastructure for loading modules and
attaching drivers to nvdimm devices. This is a simple association of a
nd-device-type number with a driver that has a bitmask of supported
device types. To facilitate userspace bind/unbind operations 'modalias'
and 'devtype', that also appear in the uevent, are added as generic
sysfs attributes for all nvdimm devices. The reason for the device-type
number is to support sub-types within a given parent devtype, be it a
vendor-specific sub-type or otherwise.
* The first consumer of this infrastructure is the driver
for dimm devices. It simply uses control messages to retrieve and
store the configuration-data image (label set) from each dimm.
Note: nd_device_register() arranges for asynchronous registration of
nvdimm bus devices by default.
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Neil Brown <neilb@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi/nfit.c')
| -rw-r--r-- | drivers/acpi/nfit.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index 9112a6210a4b..c4ccec1bc60b 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -18,6 +18,10 @@ #include <linux/acpi.h> #include "nfit.h" +static bool force_enable_dimms; +module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status"); + static u8 nfit_uuid[NFIT_UUID_MAX][16]; static const u8 *to_nfit_uuid(enum nfit_uuids id) @@ -633,6 +637,7 @@ static struct attribute_group acpi_nfit_dimm_attribute_group = { static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = { &nvdimm_attribute_group, + &nd_device_attribute_group, &acpi_nfit_dimm_attribute_group, NULL, }; @@ -669,7 +674,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, if (!adev_dimm) { dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n", device_handle); - return -ENODEV; + return force_enable_dimms ? 0 : -ENODEV; } status = acpi_evaluate_integer(adev_dimm->handle, "_STA", NULL, &sta); @@ -690,12 +695,13 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i)) set_bit(i, &nfit_mem->dsm_mask); - return rc; + return force_enable_dimms ? 0 : rc; } static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) { struct nfit_mem *nfit_mem; + int dimm_count = 0; list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) { struct nvdimm *nvdimm; @@ -729,9 +735,10 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) return -ENOMEM; nfit_mem->nvdimm = nvdimm; + dimm_count++; } - return 0; + return nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count); } static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc) |