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authorLinus Torvalds2016-03-16 17:45:56 -0700
committerLinus Torvalds2016-03-16 17:45:56 -0700
commit8759957b77ac1b5b5bdfac5ba049789107e85190 (patch)
tree82d520563ea686259f29fab26abec293b5ee6a5f /include
parent6968e6f8329d014920331dd2cf166ccd474b5299 (diff)
parent489011652a2d5555901def04c24d68874e8ba9a1 (diff)
Merge tag 'libnvdimm-for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams: - Asynchronous address range scrub: Given the capacities of next generation persistent memory devices a scrub operation to find all poison may take 10s of seconds. We want this scrub work to be done asynchronously with the rest of system initialization, so we move it out of line from the NFIT probing, i.e. acpi_nfit_add(). - Clear poison: ACPI 6.1 introduces the ability to send "clear error" commands to the ACPI0012:00 device representing the root of an "nvdimm bus". Similar to relocating a bad block on a disk, this support clears media errors in response to a write. - Persistent memory resource tracking: A persistent memory range may be designated as simply "reserved" by platform firmware in the efi/e820 memory map. Later when the NFIT driver loads it discovers that the range is "Persistent Memory". The NFIT bus driver inserts a resource to advertise that "persistent" attribute in the system resource tree for /proc/iomem and kernel-internal usages. - Miscellaneous cleanups and fixes: Workaround section misaligned pmem ranges when allocating a struct page memmap, fix handling of the read-only case in the ioctl path, and clean up block device major number allocation. * tag 'libnvdimm-for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (26 commits) libnvdimm, pmem: clear poison on write libnvdimm, pmem: fix kmap_atomic() leak in error path nvdimm/btt: don't allocate unused major device number nvdimm/blk: don't allocate unused major device number pmem: don't allocate unused major device number ACPI: Change NFIT driver to insert new resource resource: Export insert_resource and remove_resource resource: Add remove_resource interface resource: Change __request_region to inherit from immediate parent libnvdimm, pmem: fix ia64 build, use PHYS_PFN nfit, libnvdimm: clear poison command support libnvdimm, pfn: 'resource'-address and 'size' attributes for pfn devices libnvdimm, pmem: adjust for section collisions with 'System RAM' libnvdimm, pmem: fix 'pfn' support for section-misaligned namespaces libnvdimm: Fix security issue with DSM IOCTL. libnvdimm: Clean-up access mode check. tools/testing/nvdimm: expand ars unit testing nfit: disable userspace initiated ars during scrub nfit: scrub and register regions in a workqueue nfit, libnvdimm: async region scrub workqueue ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/ioport.h1
-rw-r--r--include/linux/libnvdimm.h5
-rw-r--r--include/linux/nd.h7
-rw-r--r--include/linux/pmem.h19
-rw-r--r--include/uapi/linux/ndctl.h13
5 files changed, 44 insertions, 1 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 212a8e69d7c0..0b65543dc6cf 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -172,6 +172,7 @@ extern void reserve_region_with_split(struct resource *root,
extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
extern int insert_resource(struct resource *parent, struct resource *new);
extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
+extern int remove_resource(struct resource *old);
extern void arch_remove_reservations(struct resource *avail);
extern int allocate_resource(struct resource *root, struct resource *new,
resource_size_t size, resource_size_t min,
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index 141ffdd59960..833867b9ddc2 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -48,7 +48,7 @@ struct nvdimm;
struct nvdimm_bus_descriptor;
typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
struct nvdimm *nvdimm, unsigned int cmd, void *buf,
- unsigned int buf_len);
+ unsigned int buf_len, int *cmd_rc);
struct nd_namespace_label;
struct nvdimm_drvdata;
@@ -71,6 +71,9 @@ struct nvdimm_bus_descriptor {
unsigned long dsm_mask;
char *provider_name;
ndctl_fn ndctl;
+ int (*flush_probe)(struct nvdimm_bus_descriptor *nd_desc);
+ int (*clear_to_send)(struct nvdimm_bus_descriptor *nd_desc,
+ struct nvdimm *nvdimm, unsigned int cmd);
};
struct nd_cmd_desc {
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) \
diff --git a/include/linux/pmem.h b/include/linux/pmem.h
index 7c3d11a6b4ad..3ec5309e29f3 100644
--- a/include/linux/pmem.h
+++ b/include/linux/pmem.h
@@ -58,6 +58,11 @@ static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size)
{
BUG();
}
+
+static inline void arch_invalidate_pmem(void __pmem *addr, size_t size)
+{
+ BUG();
+}
#endif
/*
@@ -186,6 +191,20 @@ static inline void clear_pmem(void __pmem *addr, size_t size)
}
/**
+ * invalidate_pmem - flush a pmem range from the cache hierarchy
+ * @addr: virtual start address
+ * @size: bytes to invalidate (internally aligned to cache line size)
+ *
+ * For platforms that support clearing poison this flushes any poisoned
+ * ranges out of the cache
+ */
+static inline void invalidate_pmem(void __pmem *addr, size_t size)
+{
+ if (arch_has_pmem_api())
+ arch_invalidate_pmem(addr, size);
+}
+
+/**
* wb_cache_pmem - write back processor cache for PMEM memory range
* @addr: virtual start address
* @size: number of bytes to write back
diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
index cc68b92124d4..7cc28ab05b87 100644
--- a/include/uapi/linux/ndctl.h
+++ b/include/uapi/linux/ndctl.h
@@ -98,6 +98,14 @@ struct nd_cmd_ars_status {
} __packed records[0];
} __packed;
+struct nd_cmd_clear_error {
+ __u64 address;
+ __u64 length;
+ __u32 status;
+ __u8 reserved[4];
+ __u64 cleared;
+} __packed;
+
enum {
ND_CMD_IMPLEMENTED = 0,
@@ -105,6 +113,7 @@ enum {
ND_CMD_ARS_CAP = 1,
ND_CMD_ARS_START = 2,
ND_CMD_ARS_STATUS = 3,
+ ND_CMD_CLEAR_ERROR = 4,
/* per-dimm commands */
ND_CMD_SMART = 1,
@@ -129,6 +138,7 @@ static inline const char *nvdimm_bus_cmd_name(unsigned cmd)
[ND_CMD_ARS_CAP] = "ars_cap",
[ND_CMD_ARS_START] = "ars_start",
[ND_CMD_ARS_STATUS] = "ars_status",
+ [ND_CMD_CLEAR_ERROR] = "clear_error",
};
if (cmd < ARRAY_SIZE(names) && names[cmd])
@@ -187,6 +197,9 @@ static inline const char *nvdimm_cmd_name(unsigned cmd)
#define ND_IOCTL_ARS_STATUS _IOWR(ND_IOCTL, ND_CMD_ARS_STATUS,\
struct nd_cmd_ars_status)
+#define ND_IOCTL_CLEAR_ERROR _IOWR(ND_IOCTL, ND_CMD_CLEAR_ERROR,\
+ struct nd_cmd_clear_error)
+
#define ND_DEVICE_DIMM 1 /* nd_dimm: container for "config data" */
#define ND_DEVICE_REGION_PMEM 2 /* nd_region: (parent of PMEM namespaces) */
#define ND_DEVICE_REGION_BLK 3 /* nd_region: (parent of BLK namespaces) */