diff options
Diffstat (limited to 'drivers/nvdimm/region_devs.c')
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index ec3543b83330..fa37afcd43ff 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -389,6 +389,30 @@ resource_size_t nd_region_available_dpa(struct nd_region *nd_region) return available; } +resource_size_t nd_region_allocatable_dpa(struct nd_region *nd_region) +{ + resource_size_t available = 0; + int i; + + if (is_memory(&nd_region->dev)) + available = PHYS_ADDR_MAX; + + WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); + for (i = 0; i < nd_region->ndr_mappings; i++) { + struct nd_mapping *nd_mapping = &nd_region->mapping[i]; + + if (is_memory(&nd_region->dev)) + available = min(available, + nd_pmem_max_contiguous_dpa(nd_region, + nd_mapping)); + else if (is_nd_blk(&nd_region->dev)) + available += nd_blk_available_dpa(nd_region); + } + if (is_memory(&nd_region->dev)) + return available * nd_region->ndr_mappings; + return available; +} + static ssize_t available_size_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -410,6 +434,21 @@ static ssize_t available_size_show(struct device *dev, } static DEVICE_ATTR_RO(available_size); +static ssize_t max_available_extent_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nd_region *nd_region = to_nd_region(dev); + unsigned long long available = 0; + + nvdimm_bus_lock(dev); + wait_nvdimm_bus_probe_idle(dev); + available = nd_region_allocatable_dpa(nd_region); + nvdimm_bus_unlock(dev); + + return sprintf(buf, "%llu\n", available); +} +static DEVICE_ATTR_RO(max_available_extent); + static ssize_t init_namespaces_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -561,6 +600,7 @@ static struct attribute *nd_region_attributes[] = { &dev_attr_read_only.attr, &dev_attr_set_cookie.attr, &dev_attr_available_size.attr, + &dev_attr_max_available_extent.attr, &dev_attr_namespace_seed.attr, &dev_attr_init_namespaces.attr, &dev_attr_badblocks.attr, |