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| author | Dan Williams <dan.j.williams@intel.com> | 2015-06-08 14:27:06 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
| commit | 62232e45f4a265abb43f0acf16e58f5d0b6e1ec9 (patch) | |
| tree | 12092e5b33c1d8e7008c4ffa483607a26fd517b3 /drivers/nvdimm/core.c | |
| parent | e6dfb2de47768efe8cc37c9a1863d2aff81440fb (diff) | |
| download | linux-62232e45f4a265abb43f0acf16e58f5d0b6e1ec9.tar.bz2 | |
libnvdimm: control (ioctl) messages for nvdimm_bus and nvdimm devices
Most discovery/configuration of the nvdimm-subsystem is done via sysfs
attributes. However, some nvdimm_bus instances, particularly the
ACPI.NFIT bus, define a small set of messages that can be passed to the
platform. For convenience we derive the initial libnvdimm-ioctl command
formats directly from the NFIT DSM Interface Example formats.
ND_CMD_SMART: media health and diagnostics
ND_CMD_GET_CONFIG_SIZE: size of the label space
ND_CMD_GET_CONFIG_DATA: read label space
ND_CMD_SET_CONFIG_DATA: write label space
ND_CMD_VENDOR: vendor-specific command passthrough
ND_CMD_ARS_CAP: report address-range-scrubbing capabilities
ND_CMD_ARS_START: initiate scrubbing
ND_CMD_ARS_STATUS: report on scrubbing state
ND_CMD_SMART_THRESHOLD: configure alarm thresholds for smart events
If a platform later defines different commands than this set it is
straightforward to extend support to those formats.
Most of the commands target a specific dimm. However, the
address-range-scrubbing commands target the bus. The 'commands'
attribute in sysfs of an nvdimm_bus, or nvdimm, enumerate the supported
commands for that object.
Cc: <linux-acpi@vger.kernel.org>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reported-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/core.c')
| -rw-r--r-- | drivers/nvdimm/core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c index ef957eb37c90..1ce159095c52 100644 --- a/drivers/nvdimm/core.c +++ b/drivers/nvdimm/core.c @@ -14,6 +14,7 @@ #include <linux/export.h> #include <linux/module.h> #include <linux/device.h> +#include <linux/ndctl.h> #include <linux/mutex.h> #include <linux/slab.h> #include "nd-core.h" @@ -61,6 +62,20 @@ struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev) return NULL; } +static ssize_t commands_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int cmd, len = 0; + struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); + struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; + + for_each_set_bit(cmd, &nd_desc->dsm_mask, BITS_PER_LONG) + len += sprintf(buf + len, "%s ", nvdimm_bus_cmd_name(cmd)); + len += sprintf(buf + len, "\n"); + return len; +} +static DEVICE_ATTR_RO(commands); + static const char *nvdimm_bus_provider(struct nvdimm_bus *nvdimm_bus) { struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; @@ -84,6 +99,7 @@ static ssize_t provider_show(struct device *dev, static DEVICE_ATTR_RO(provider); static struct attribute *nvdimm_bus_attributes[] = { + &dev_attr_commands.attr, &dev_attr_provider.attr, NULL, }; |