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authorDave Jiang <dave.jiang@intel.com>2018-12-06 10:39:29 +0300
committerDan Williams <dan.j.williams@intel.com>2018-12-14 04:54:13 +0300
commitf2989396553a0bd13f4b25f567a3dee3d722ce40 (patch)
treec1790f66286bd33d40e0286349305acf71210abd /include/linux/libnvdimm.h
parent9db67581b91d9e9e05c35570ac3f93872e6c84ca (diff)
downloadlinux-f2989396553a0bd13f4b25f567a3dee3d722ce40.tar.xz
acpi/nfit, libnvdimm: Introduce nvdimm_security_ops
Some NVDIMMs, like the ones defined by the NVDIMM_FAMILY_INTEL command set, expose a security capability to lock the DIMMs at poweroff and require a passphrase to unlock them. The security model is derived from ATA security. In anticipation of other DIMMs implementing a similar scheme, and to abstract the core security implementation away from the device-specific details, introduce nvdimm_security_ops. Initially only a status retrieval operation, ->state(), is defined, along with the base infrastructure and definitions for future operations. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Co-developed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/libnvdimm.h')
-rw-r--r--include/linux/libnvdimm.h27
1 files changed, 25 insertions, 2 deletions
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index f980046b9588..f4d63f49f7dd 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -155,6 +155,18 @@ static inline struct nd_blk_region_desc *to_blk_region_desc(
}
+enum nvdimm_security_state {
+ NVDIMM_SECURITY_DISABLED,
+ NVDIMM_SECURITY_UNLOCKED,
+ NVDIMM_SECURITY_LOCKED,
+ NVDIMM_SECURITY_FROZEN,
+ NVDIMM_SECURITY_OVERWRITE,
+};
+
+struct nvdimm_security_ops {
+ enum nvdimm_security_state (*state)(struct nvdimm *nvdimm);
+};
+
void badrange_init(struct badrange *badrange);
int badrange_add(struct badrange *badrange, u64 addr, u64 length);
void badrange_forget(struct badrange *badrange, phys_addr_t start,
@@ -165,6 +177,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
struct nvdimm_bus_descriptor *nfit_desc);
void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
+struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm);
struct nvdimm *to_nvdimm(struct device *dev);
struct nd_region *to_nd_region(struct device *dev);
struct device *nd_region_dev(struct nd_region *nd_region);
@@ -178,14 +191,15 @@ void *nvdimm_provider_data(struct nvdimm *nvdimm);
struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
void *provider_data, const struct attribute_group **groups,
unsigned long flags, unsigned long cmd_mask, int num_flush,
- struct resource *flush_wpq, const char *dimm_id);
+ struct resource *flush_wpq, const char *dimm_id,
+ const struct nvdimm_security_ops *sec_ops);
static inline struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus,
void *provider_data, const struct attribute_group **groups,
unsigned long flags, unsigned long cmd_mask, int num_flush,
struct resource *flush_wpq)
{
return __nvdimm_create(nvdimm_bus, provider_data, groups, flags,
- cmd_mask, num_flush, flush_wpq, NULL);
+ cmd_mask, num_flush, flush_wpq, NULL, NULL);
}
const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
@@ -214,6 +228,15 @@ void nvdimm_flush(struct nd_region *nd_region);
int nvdimm_has_flush(struct nd_region *nd_region);
int nvdimm_has_cache(struct nd_region *nd_region);
+static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf,
+ unsigned int buf_len, int *cmd_rc)
+{
+ struct nvdimm_bus *nvdimm_bus = nvdimm_to_bus(nvdimm);
+ struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus);
+
+ return nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, cmd_rc);
+}
+
#ifdef CONFIG_ARCH_HAS_PMEM_API
#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
void arch_wb_cache_pmem(void *addr, size_t size);