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author | Dan Williams <dan.j.williams@intel.com> | 2015-06-08 14:27:06 -0400 |
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committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
commit | 62232e45f4a265abb43f0acf16e58f5d0b6e1ec9 (patch) | |
tree | 12092e5b33c1d8e7008c4ffa483607a26fd517b3 /drivers/nvdimm/dimm_devs.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/dimm_devs.c')
-rw-r--r-- | drivers/nvdimm/dimm_devs.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 51ea52cc2079..c3dd7227d1bb 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -12,6 +12,7 @@ */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/device.h> +#include <linux/ndctl.h> #include <linux/slab.h> #include <linux/io.h> #include <linux/fs.h> @@ -33,7 +34,7 @@ static struct device_type nvdimm_device_type = { .release = nvdimm_release, }; -static bool is_nvdimm(struct device *dev) +bool is_nvdimm(struct device *dev) { return dev->type == &nvdimm_device_type; } @@ -55,12 +56,41 @@ EXPORT_SYMBOL_GPL(nvdimm_name); void *nvdimm_provider_data(struct nvdimm *nvdimm) { - return nvdimm->provider_data; + if (nvdimm) + return nvdimm->provider_data; + return NULL; } EXPORT_SYMBOL_GPL(nvdimm_provider_data); +static ssize_t commands_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nvdimm *nvdimm = to_nvdimm(dev); + int cmd, len = 0; + + if (!nvdimm->dsm_mask) + return sprintf(buf, "\n"); + + for_each_set_bit(cmd, nvdimm->dsm_mask, BITS_PER_LONG) + len += sprintf(buf + len, "%s ", nvdimm_cmd_name(cmd)); + len += sprintf(buf + len, "\n"); + return len; +} +static DEVICE_ATTR_RO(commands); + +static struct attribute *nvdimm_attributes[] = { + &dev_attr_commands.attr, + NULL, +}; + +struct attribute_group nvdimm_attribute_group = { + .attrs = nvdimm_attributes, +}; +EXPORT_SYMBOL_GPL(nvdimm_attribute_group); + struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data, - const struct attribute_group **groups, unsigned long flags) + const struct attribute_group **groups, unsigned long flags, + unsigned long *dsm_mask) { struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL); struct device *dev; @@ -75,12 +105,14 @@ struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data, } nvdimm->provider_data = provider_data; nvdimm->flags = flags; + nvdimm->dsm_mask = dsm_mask; dev = &nvdimm->dev; dev_set_name(dev, "nmem%d", nvdimm->id); dev->parent = &nvdimm_bus->dev; dev->type = &nvdimm_device_type; dev->bus = &nvdimm_bus_type; + dev->devt = MKDEV(nvdimm_major, nvdimm->id); dev->groups = groups; if (device_register(dev) != 0) { put_device(dev); |