diff options
author | Linus Torvalds | 2016-03-16 17:45:56 -0700 |
---|---|---|
committer | Linus Torvalds | 2016-03-16 17:45:56 -0700 |
commit | 8759957b77ac1b5b5bdfac5ba049789107e85190 (patch) | |
tree | 82d520563ea686259f29fab26abec293b5ee6a5f /include | |
parent | 6968e6f8329d014920331dd2cf166ccd474b5299 (diff) | |
parent | 489011652a2d5555901def04c24d68874e8ba9a1 (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.h | 1 | ||||
-rw-r--r-- | include/linux/libnvdimm.h | 5 | ||||
-rw-r--r-- | include/linux/nd.h | 7 | ||||
-rw-r--r-- | include/linux/pmem.h | 19 | ||||
-rw-r--r-- | include/uapi/linux/ndctl.h | 13 |
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) */ |