Merge tag 'libnvdimm-for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "Aside from the recently added pmem sub-division support these have
  been in -next for several releases with no reported issues. The sub-
  division support was included in next-20161010 with no reported
  issues. It passes all unit tests including new tests for all the new
  functionality below.

  Summary:

   - PMEM sub-division support: Allow a single PMEM region to be divided
     into multiple namespaces. Originally, ~2 years ago, it was thought
     that partitions of a /dev/pmemX block device could handle
     sub-allocations of persistent memory for different use cases. With
     the decision to not support DAX mappings of raw block-devices, and
     the genesis of device-dax, the need for having multiple
     pmem-namespace per region has grown.

   - Device-DAX unified inode: In support of dynamic-resizing of a
     device-dax instance the kernel arranges for all mappings of a
     device-dax node to share the same inode. This allows unmap /
     truncate / invalidation events to affect all instances of the
     device similar to the behavior of mmap on block devices.

   - Hardware error scrubbing reworks: The original address-range-scrub
     and badblocks tracking solution allowed clearing entries at the
     individual namespace level, but it failed to clear the internal
     list of media errors maintained at the bus level. The result was
     that the next scrub or namespace disable/re-enable event would
     restore the cleared badblocks, but now that is fixed. The v4.8
     kernel introduced an auto-scrub-on-machine-check behavior to
     repopulate the badblocks list. Now, in v4.9, the auto-scrub
     behavior can be disabled and simply arrange for the error reported
     in the machine-check to be added to the list.

   - DIMM health-event notification support: ACPI 6.1 defines a
     notification event code that can be send to ACPI NVDIMM devices. A
     poll(2) capable file descriptor for these events can be obtained
     from the nmemX/nfit/flags sysfs-attribute of a libnvdimm memory
     device.

   - Miscellaneous fixes: NVDIMM-N probe error, device-dax build error,
     and a change to dedup the flush hint list to not flush the memory
     controller more than necessary"

* tag 'libnvdimm-for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
  /dev/dax: fix Kconfig dependency build breakage
  dax: use correct dev_t value
  dax: convert devm_create_dax_dev to PTR_ERR
  libnvdimm, namespace: allow creation of multiple pmem-namespaces per region
  libnvdimm, namespace: lift single pmem limit in scan_labels()
  libnvdimm, namespace: filter out of range labels in scan_labels()
  libnvdimm, namespace: enable allocation of multiple pmem namespaces
  libnvdimm, namespace: update label implementation for multi-pmem
  libnvdimm, namespace: expand pmem device naming scheme for multi-pmem
  libnvdimm, region: update nd_region_available_dpa() for multi-pmem support
  libnvdimm, namespace: sort namespaces by dpa at init
  libnvdimm, namespace: allow multiple pmem-namespaces per region at scan time
  tools/testing/nvdimm: support for sub-dividing a pmem region
  libnvdimm, namespace: unify blk and pmem label scanning
  libnvdimm, namespace: refactor uuid_show() into a namespace_to_uuid() helper
  libnvdimm, label: convert label tracking to a linked list
  libnvdimm, region: move region-mapping input-paramters to nd_mapping_desc
  nvdimm: reduce duplicated wpq flushes
  libnvdimm: clear the internal poison_list when clearing badblocks
  pmem: reduce kmap_atomic sections to the memcpys only
  ...

2 files changed, 15 insertions, 21 deletions

diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index b519e137b9b7..f4947fda11e7 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -50,23 +50,6 @@ typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
 		struct nvdimm *nvdimm, unsigned int cmd, void *buf,
 		unsigned int buf_len, int *cmd_rc);
 
-struct nd_namespace_label;
-struct nvdimm_drvdata;
-
-struct nd_mapping {
-	struct nvdimm *nvdimm;
-	struct nd_namespace_label **labels;
-	u64 start;
-	u64 size;
-	/*
-	 * @ndd is for private use at region enable / disable time for
-	 * get_ndd() + put_ndd(), all other nd_mapping to ndd
-	 * conversions use to_ndd() which respects enabled state of the
-	 * nvdimm.
-	 */
-	struct nvdimm_drvdata *ndd;
-};
-
 struct nvdimm_bus_descriptor {
 	const struct attribute_group **attr_groups;
 	unsigned long cmd_mask;
@@ -89,9 +72,15 @@ struct nd_interleave_set {
 	u64 cookie;
 };
 
+struct nd_mapping_desc {
+	struct nvdimm *nvdimm;
+	u64 start;
+	u64 size;
+};
+
 struct nd_region_desc {
 	struct resource *res;
-	struct nd_mapping *nd_mapping;
+	struct nd_mapping_desc *mapping;
 	u16 num_mappings;
 	const struct attribute_group **attr_groups;
 	struct nd_interleave_set *nd_set;
@@ -129,6 +118,8 @@ static inline struct nd_blk_region_desc *to_blk_region_desc(
 }
 
 int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length);
+void nvdimm_clear_from_poison_list(struct nvdimm_bus *nvdimm_bus,
+		phys_addr_t start, unsigned int len);
 struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
 		struct nvdimm_bus_descriptor *nfit_desc);
 void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
@@ -139,6 +130,7 @@ struct nd_blk_region *to_nd_blk_region(struct device *dev);
 struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
 struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus);
 const char *nvdimm_name(struct nvdimm *nvdimm);
+struct kobject *nvdimm_kobj(struct nvdimm *nvdimm);
 unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm);
 void *nvdimm_provider_data(struct nvdimm *nvdimm);
 struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
diff --git a/include/linux/nd.h b/include/linux/nd.h
index f1ea426d6a5e..fa66aeed441a 100644
--- a/include/linux/nd.h
+++ b/include/linux/nd.h
@@ -77,11 +77,13 @@ struct nd_namespace_io {
  * @nsio: device and system physical address range to drive
  * @alt_name: namespace name supplied in the dimm label
  * @uuid: namespace name supplied in the dimm label
+ * @id: ida allocated id
  */
 struct nd_namespace_pmem {
 	struct nd_namespace_io nsio;
 	char *alt_name;
 	u8 *uuid;
+	int id;
 };
 
 /**
@@ -105,19 +107,19 @@ struct nd_namespace_blk {
 	struct resource **res;
 };
 
-static inline struct nd_namespace_io *to_nd_namespace_io(struct device *dev)
+static inline struct nd_namespace_io *to_nd_namespace_io(const struct device *dev)
 {
 	return container_of(dev, struct nd_namespace_io, common.dev);
 }
 
-static inline struct nd_namespace_pmem *to_nd_namespace_pmem(struct device *dev)
+static inline struct nd_namespace_pmem *to_nd_namespace_pmem(const struct device *dev)
 {
 	struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
 
 	return container_of(nsio, struct nd_namespace_pmem, nsio);
 }
 
-static inline struct nd_namespace_blk *to_nd_namespace_blk(struct device *dev)
+static inline struct nd_namespace_blk *to_nd_namespace_blk(const struct device *dev)
 {
 	return container_of(dev, struct nd_namespace_blk, common.dev);
 }