nfit, libnvdimm: deprecate the generic SMART ioctl

The kernel's ND_IOCTL_SMART_THRESHOLD command is based on a payload
definition that has become broken / out-of-sync with recent versions of
the NVDIMM_FAMILY_INTEL definition. Deprecate the use of the
ND_IOCTL_SMART_THRESHOLD command in favor of the ND_CMD_CALL approach
taken by NVDIMM_FAMILY_{HPE,MSFT}, where we can manage the per-vendor
variance in userspace.

In a couple years, when the new scheme is widely deployed in userspace
packages, the ND_IOCTL_SMART_THRESHOLD support can be removed. For now
we prevent new binaries from compiling against the kernel header
definitions, but kernel still compatible with old binaries. The
libndctl.h [1] header is now the authoritative interface definition for
NVDIMM SMART.

[1]: https://github.com/pmem/ndctl
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

2 files changed, 84 insertions, 14 deletions

diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index 7217b2b..640c02b 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -440,39 +440,50 @@ static int nfit_test_cmd_translate_spa(struct nvdimm_bus *bus,
 	return 0;
 }
 
-static int nfit_test_cmd_smart(struct nd_cmd_smart *smart, unsigned int buf_len)
+static int nfit_test_cmd_smart(struct nd_intel_smart *smart, unsigned int buf_len)
 {
-	static const struct nd_smart_payload smart_data = {
-		.flags = ND_SMART_HEALTH_VALID | ND_SMART_TEMP_VALID
-			| ND_SMART_SPARES_VALID | ND_SMART_ALARM_VALID
-			| ND_SMART_USED_VALID | ND_SMART_SHUTDOWN_VALID,
-		.health = ND_SMART_NON_CRITICAL_HEALTH,
-		.temperature = 23 * 16,
+	static const struct nd_intel_smart smart_data = {
+		.flags = ND_INTEL_SMART_HEALTH_VALID
+			| ND_INTEL_SMART_SPARES_VALID
+			| ND_INTEL_SMART_ALARM_VALID
+			| ND_INTEL_SMART_USED_VALID
+			| ND_INTEL_SMART_SHUTDOWN_VALID
+			| ND_INTEL_SMART_MTEMP_VALID,
+		.health = ND_INTEL_SMART_NON_CRITICAL_HEALTH,
+		.media_temperature = 23 * 16,
+		.ctrl_temperature = 30 * 16,
+		.pmic_temperature = 40 * 16,
 		.spares = 75,
-		.alarm_flags = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
+		.alarm_flags = ND_INTEL_SMART_SPARE_TRIP
+			| ND_INTEL_SMART_TEMP_TRIP,
+		.ait_status = 1,
 		.life_used = 5,
 		.shutdown_state = 0,
 		.vendor_size = 0,
+		.shutdown_count = 100,
 	};
 
 	if (buf_len < sizeof(*smart))
 		return -EINVAL;
-	memcpy(smart->data, &smart_data, sizeof(smart_data));
+	memcpy(smart, &smart_data, sizeof(smart_data));
 	return 0;
 }
 
-static int nfit_test_cmd_smart_threshold(struct nd_cmd_smart_threshold *smart_t,
+static int nfit_test_cmd_smart_threshold(
+		struct nd_intel_smart_threshold *smart_t,
 		unsigned int buf_len)
 {
-	static const struct nd_smart_threshold_payload smart_t_data = {
-		.alarm_control = ND_SMART_SPARE_TRIP | ND_SMART_TEMP_TRIP,
-		.temperature = 40 * 16,
+	static const struct nd_intel_smart_threshold smart_t_data = {
+		.alarm_control = ND_INTEL_SMART_SPARE_TRIP
+			| ND_INTEL_SMART_TEMP_TRIP,
+		.media_temperature = 40 * 16,
+		.ctrl_temperature = 30 * 16,
 		.spares = 5,
 	};
 
 	if (buf_len < sizeof(*smart_t))
 		return -EINVAL;
-	memcpy(smart_t->data, &smart_t_data, sizeof(smart_t_data));
+	memcpy(smart_t, &smart_t_data, sizeof(smart_t_data));
 	return 0;
 }
 
diff --git a/tools/testing/nvdimm/test/nfit_test.h b/tools/testing/nvdimm/test/nfit_test.h
index 113b446..b85fba2 100644
--- a/tools/testing/nvdimm/test/nfit_test.h
+++ b/tools/testing/nvdimm/test/nfit_test.h
@@ -84,6 +84,65 @@ struct nd_cmd_ars_err_inj_stat {
 	} __packed record[0];
 } __packed;
 
+#define ND_INTEL_SMART 1
+#define ND_INTEL_SMART_THRESHOLD 2
+
+#define ND_INTEL_SMART_HEALTH_VALID             (1 << 0)
+#define ND_INTEL_SMART_SPARES_VALID             (1 << 1)
+#define ND_INTEL_SMART_USED_VALID               (1 << 2)
+#define ND_INTEL_SMART_MTEMP_VALID              (1 << 3)
+#define ND_INTEL_SMART_CTEMP_VALID              (1 << 4)
+#define ND_INTEL_SMART_SHUTDOWN_COUNT_VALID     (1 << 5)
+#define ND_INTEL_SMART_AIT_STATUS_VALID         (1 << 6)
+#define ND_INTEL_SMART_PTEMP_VALID              (1 << 7)
+#define ND_INTEL_SMART_ALARM_VALID              (1 << 9)
+#define ND_INTEL_SMART_SHUTDOWN_VALID           (1 << 10)
+#define ND_INTEL_SMART_VENDOR_VALID             (1 << 11)
+#define ND_INTEL_SMART_SPARE_TRIP               (1 << 0)
+#define ND_INTEL_SMART_TEMP_TRIP                (1 << 1)
+#define ND_INTEL_SMART_CTEMP_TRIP               (1 << 2)
+#define ND_INTEL_SMART_NON_CRITICAL_HEALTH      (1 << 0)
+#define ND_INTEL_SMART_CRITICAL_HEALTH          (1 << 1)
+#define ND_INTEL_SMART_FATAL_HEALTH             (1 << 2)
+
+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 {
+		struct {
+			__u16 alarm_control;
+			__u8 spares;
+			__u16 media_temperature;
+			__u16 ctrl_temperature;
+			__u8 reserved[1];
+		} __packed;
+		__u8 data[8];
+	};
+} __packed;
+
 union acpi_object;
 typedef void *acpi_handle;