Some NVDIMMs, in addition to providing an indication of whether the
previous shutdown was clean, also provide a running count of lifetime
dirty-shutdown events for the device. In anticipation of this
functionality appearing on more devices arrange for the nfit driver to
retrieve / cache this data at DIMM discovery time, and export it via
sysfs.
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/acpi/nfit/core.c | 76 +++++++++++++++++++++++++++++++++
drivers/acpi/nfit/intel.h | 34 +++++++++++++++
drivers/acpi/nfit/nfit.h | 3 +
tools/testing/nvdimm/test/nfit_test.h | 24 ----------
4 files changed, 112 insertions(+), 25 deletions(-)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index f6944f9011fd..c28b4d0dbe51 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1560,7 +1560,12 @@ static DEVICE_ATTR_RO(dsm_mask);
static ssize_t flags_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- u16 flags = to_nfit_memdev(dev)->flags;
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
+ u16 flags = __to_nfit_memdev(nfit_mem)->flags;
+
+ if (test_bit(NFIT_MEM_DIRTY, &nfit_mem->flags))
+ flags |= ACPI_NFIT_MEM_FLUSH_FAILED;
return sprintf(buf, "%s%s%s%s%s%s%s\n",
flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save_fail " : "",
@@ -1583,6 +1588,16 @@ static ssize_t id_show(struct device *dev,
}
static DEVICE_ATTR_RO(id);
+static ssize_t dirty_shutdown_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
+
+ return sprintf(buf, "%d\n", nfit_mem->dirty_shutdown);
+}
+static DEVICE_ATTR_RO(dirty_shutdown);
+
static struct attribute *acpi_nfit_dimm_attributes[] = {
&dev_attr_handle.attr,
&dev_attr_phys_id.attr,
@@ -1600,6 +1615,7 @@ static struct attribute *acpi_nfit_dimm_attributes[] = {
&dev_attr_id.attr,
&dev_attr_family.attr,
&dev_attr_dsm_mask.attr,
+ &dev_attr_dirty_shutdown.attr,
NULL,
};
@@ -1608,6 +1624,7 @@ static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
{
struct device *dev = container_of(kobj, struct device, kobj);
struct nvdimm *nvdimm = to_nvdimm(dev);
+ struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
if (!to_nfit_dcr(dev)) {
/* Without a dcr only the memdev attributes can be surfaced */
@@ -1621,6 +1638,11 @@ static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
if (a == &dev_attr_format1.attr && num_nvdimm_formats(nvdimm) <= 1)
return 0;
+
+ if (!test_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags)
+ && a == &dev_attr_dirty_shutdown.attr)
+ return 0;
+
return a->mode;
}
@@ -1699,6 +1721,56 @@ static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
return false;
}
+static void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
+{
+ struct nd_intel_smart smart = { 0 };
+ union acpi_object in_buf = {
+ .type = ACPI_TYPE_BUFFER,
+ .buffer.pointer = (char *) &smart,
+ .buffer.length = sizeof(smart),
+ };
+ union acpi_object in_obj = {
+ .type = ACPI_TYPE_PACKAGE,
+ .package.count = 1,
+ .package.elements = &in_buf,
+ };
+ const u8 func = ND_INTEL_SMART;
+ const guid_t *guid = to_nfit_uuid(nfit_mem->family);
+ u8 revid = nfit_dsm_revid(nfit_mem->family, func);
+ struct acpi_device *adev = nfit_mem->adev;
+ acpi_handle handle = adev->handle;
+ union acpi_object *out_obj;
+
+ if ((nfit_mem->dsm_mask & (1 << func)) == 0)
+ return;
+
+ out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
+ if (!out_obj)
+ return;
+
+ if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
+ if (smart.shutdown_state)
+ set_bit(NFIT_MEM_DIRTY, &nfit_mem->flags);
+ }
+
+ if (smart.flags & ND_INTEL_SMART_SHUTDOWN_COUNT_VALID) {
+ set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
+ nfit_mem->dirty_shutdown = smart.shutdown_count;
+ }
+ ACPI_FREE(out_obj);
+}
+
+static void populate_shutdown_status(struct nfit_mem *nfit_mem)
+{
+ /*
+ * For DIMMs that provide a dynamic facility to retrieve a
+ * dirty-shutdown status and/or a dirty-shutdown count, cache
+ * these values in nfit_mem.
+ */
+ if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
+ nfit_intel_shutdown_status(nfit_mem);
+}
+
static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
struct nfit_mem *nfit_mem, u32 device_handle)
{
@@ -1811,6 +1883,8 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
}
+ populate_shutdown_status(nfit_mem);
+
return 0;
}
diff --git a/drivers/acpi/nfit/intel.h b/drivers/acpi/nfit/intel.h
index f831084f95fa..ca454a422aa3 100644
--- a/drivers/acpi/nfit/intel.h
+++ b/drivers/acpi/nfit/intel.h
@@ -6,6 +6,40 @@
#ifndef _NFIT_INTEL_H_
#define _NFIT_INTEL_H_
+/*
+ * While the security ops require CONFIG_X86 due to the need to
+ * coordinate cache management, the ND_INTEL_SMART command could be
+ * generically supported on any arch.
+ */
+#define ND_INTEL_SMART 1
+
+#define ND_INTEL_SMART_SHUTDOWN_COUNT_VALID (1 << 5)
+#define ND_INTEL_SMART_SHUTDOWN_VALID (1 << 10)
+
+struct nd_intel_smart {
+ u32 status;
+ union {
+ struct {
+ u32 flags;
+ u8 reserved0[4];
+ u8 health;
+ u8 spares;
+ u8 life_used;
+ u8 alarm_flags;
+ u16 media_temperature;
+ u16 ctrl_temperature;
+ u32 shutdown_count;
+ u8 ait_status;
+ u16 pmic_temperature;
+ u8 reserved1[8];
+ u8 shutdown_state;
+ u32 vendor_size;
+ u8 vendor_data[92];
+ } __packed;
+ u8 data[128];
+ };
+} __packed;
+
#ifdef CONFIG_X86
extern const struct nvdimm_security_ops *intel_security_ops;
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index 74706d1821df..8c1af38a5dee 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -177,6 +177,8 @@ struct nfit_memdev {
enum nfit_mem_flags {
NFIT_MEM_LSR,
NFIT_MEM_LSW,
+ NFIT_MEM_DIRTY,
+ NFIT_MEM_DIRTY_COUNT,
};
#define NFIT_DIMM_ID_LEN 22
@@ -201,6 +203,7 @@ struct nfit_mem {
struct resource *flush_wpq;
unsigned long dsm_mask;
unsigned long flags;
+ u32 dirty_shutdown;
int family;
char id[NFIT_DIMM_ID_LEN+1];
};
diff --git a/tools/testing/nvdimm/test/nfit_test.h b/tools/testing/nvdimm/test/nfit_test.h
index 33752e06ff8d..ade14fe3837e 100644
--- a/tools/testing/nvdimm/test/nfit_test.h
+++ b/tools/testing/nvdimm/test/nfit_test.h
@@ -117,30 +117,6 @@ struct nd_cmd_ars_err_inj_stat {
#define ND_INTEL_SMART_INJECT_FATAL (1 << 2)
#define ND_INTEL_SMART_INJECT_SHUTDOWN (1 << 3)
-struct nd_intel_smart {
- __u32 status;
- union {
- struct {
- __u32 flags;
- __u8 reserved0[4];
- __u8 health;
- __u8 spares;
- __u8 life_used;
- __u8 alarm_flags;
- __u16 media_temperature;
- __u16 ctrl_temperature;
- __u32 shutdown_count;
- __u8 ait_status;
- __u16 pmic_temperature;
- __u8 reserved1[8];
- __u8 shutdown_state;
- __u32 vendor_size;
- __u8 vendor_data[92];
- } __packed;
- __u8 data[128];
- };
-} __packed;
-
struct nd_intel_smart_threshold {
__u32 status;
union {
