In preparation for asynchronous address range scrub support add an ability for the pmem driver to dynamically consume address range scrub results.
Signed-off-by: Dan Williams <[email protected]> --- drivers/nvdimm/bus.c | 26 ++++++++++++++++++++++++++ drivers/nvdimm/nd.h | 2 ++ drivers/nvdimm/pmem.c | 15 +++++++++++++++ drivers/nvdimm/region.c | 12 ++++++++++++ include/linux/nd.h | 7 +++++++ 5 files changed, 62 insertions(+) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index c3ba888e3e3a..2508251439e7 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -133,6 +133,32 @@ static int nvdimm_bus_remove(struct device *dev) return rc; } +void nd_device_notify(struct device *dev, enum nvdimm_event event) +{ + device_lock(dev); + if (dev->driver) { + struct nd_device_driver *nd_drv; + + nd_drv = to_nd_device_driver(dev->driver); + if (nd_drv->notify) + nd_drv->notify(dev, event); + } + device_unlock(dev); +} +EXPORT_SYMBOL(nd_device_notify); + +void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event) +{ + struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); + + if (!nvdimm_bus) + return; + + /* caller is responsible for holding a reference on the device */ + nd_device_notify(&nd_region->dev, event); +} +EXPORT_SYMBOL_GPL(nvdimm_region_notify); + static struct bus_type nvdimm_bus_type = { .name = "nd", .uevent = nvdimm_bus_uevent, diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index ba1633b9da31..78b82f6dd191 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -18,6 +18,7 @@ #include <linux/mutex.h> #include <linux/ndctl.h> #include <linux/types.h> +#include <linux/nd.h> #include "label.h" enum { @@ -168,6 +169,7 @@ int nd_integrity_init(struct gendisk *disk, unsigned long meta_size); void wait_nvdimm_bus_probe_idle(struct device *dev); void nd_device_register(struct device *dev); void nd_device_unregister(struct device *dev, enum nd_async_mode mode); +void nd_device_notify(struct device *dev, enum nvdimm_event event); int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf, size_t len); ssize_t nd_sector_size_show(unsigned long current_lbasize, diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 8d0b54670184..efc2a5e671c6 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -488,12 +488,27 @@ static int nd_pmem_remove(struct device *dev) return 0; } +static void nd_pmem_notify(struct device *dev, enum nvdimm_event event) +{ + struct pmem_device *pmem = dev_get_drvdata(dev); + struct nd_namespace_common *ndns = pmem->ndns; + + if (event != NVDIMM_REVALIDATE_POISON) + return; + + if (is_nd_btt(dev)) + nvdimm_namespace_add_poison(ndns, &pmem->bb, 0); + else + nvdimm_namespace_add_poison(ndns, &pmem->bb, pmem->data_offset); +} + MODULE_ALIAS("pmem"); MODULE_ALIAS_ND_DEVICE(ND_DEVICE_NAMESPACE_IO); MODULE_ALIAS_ND_DEVICE(ND_DEVICE_NAMESPACE_PMEM); static struct nd_device_driver nd_pmem_driver = { .probe = nd_pmem_probe, .remove = nd_pmem_remove, + .notify = nd_pmem_notify, .drv = { .name = "nd_pmem", }, diff --git a/drivers/nvdimm/region.c b/drivers/nvdimm/region.c index 7da63eac78ee..4b7715e29cff 100644 --- a/drivers/nvdimm/region.c +++ b/drivers/nvdimm/region.c @@ -93,9 +93,21 @@ static int nd_region_remove(struct device *dev) return 0; } +static int child_notify(struct device *dev, void *data) +{ + nd_device_notify(dev, *(enum nvdimm_event *) data); + return 0; +} + +static void nd_region_notify(struct device *dev, enum nvdimm_event event) +{ + device_for_each_child(dev, &event, child_notify); +} + static struct nd_device_driver nd_region_driver = { .probe = nd_region_probe, .remove = nd_region_remove, + .notify = nd_region_notify, .drv = { .name = "nd_region", }, diff --git a/include/linux/nd.h b/include/linux/nd.h index 507e47c86737..5489ab756d1a 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -16,11 +16,16 @@ #include <linux/ndctl.h> #include <linux/device.h> +enum nvdimm_event { + NVDIMM_REVALIDATE_POISON, +}; + struct nd_device_driver { struct device_driver drv; unsigned long type; int (*probe)(struct device *dev); int (*remove)(struct device *dev); + void (*notify)(struct device *dev, enum nvdimm_event event); }; static inline struct nd_device_driver *to_nd_device_driver( @@ -144,6 +149,8 @@ static inline int nvdimm_write_bytes(struct nd_namespace_common *ndns, MODULE_ALIAS("nd:t" __stringify(type) "*") #define ND_DEVICE_MODALIAS_FMT "nd:t%d" +struct nd_region; +void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event); int __must_check __nd_driver_register(struct nd_device_driver *nd_drv, struct module *module, const char *mod_name); #define nd_driver_register(driver) \
