libnvdimm, testing: Add emulation for smart injection commands

Add support for the smart injection command in the nvdimm unit test
framework. This allows for directly injecting to smart fields and flags
that are supported in the injection command. If the injected values are
past the threshold, then an acpi notification is also triggered.

Cc: Dan Williams <[e-mail]>
Signed-off-by: Vishal Verma <[e-mail]>
Signed-off-by: Dan Williams <[e-mail]>

tools/testing/nvdimm/test/nfit.c

···
 				>= thresh->media_temperature)
 			|| ((thresh->alarm_control & ND_INTEL_SMART_CTEMP_TRIP)
 				&& smart->ctrl_temperature
-				>= thresh->ctrl_temperature)) {
+				>= thresh->ctrl_temperature)
+			|| (smart->health != ND_INTEL_SMART_NON_CRITICAL_HEALTH)
+			|| (smart->shutdown_state != 0)) {
 		device_lock(bus_dev);
 		__acpi_nvdimm_notify(dimm_dev, 0x81);
 		device_unlock(bus_dev);
···
 		return -EINVAL;
 	memcpy(thresh->data, in, size);
 	in->status = 0;
+	smart_notify(bus_dev, dimm_dev, smart, thresh);
+
+	return 0;
+}
+
+static int nfit_test_cmd_smart_inject(
+		struct nd_intel_smart_inject *inj,
+		unsigned int buf_len,
+		struct nd_intel_smart_threshold *thresh,
+		struct nd_intel_smart *smart,
+		struct device *bus_dev, struct device *dimm_dev)
+{
+	if (buf_len != sizeof(*inj))
+		return -EINVAL;
+
+	if (inj->mtemp_enable)
+		smart->media_temperature = inj->media_temperature;
+	if (inj->spare_enable)
+		smart->spares = inj->spares;
+	if (inj->fatal_enable)
+		smart->health = ND_INTEL_SMART_FATAL_HEALTH;
+	if (inj->unsafe_shutdown_enable) {
+		smart->shutdown_state = 1;
+		smart->shutdown_count++;
+	}
+	inj->status = 0;
 	smart_notify(bus_dev, dimm_dev, smart, thresh);
 
 	return 0;
···
 							t->dcr_idx]);
 			case ND_INTEL_SMART_SET_THRESHOLD:
 				return nfit_test_cmd_smart_set_threshold(buf,
+						buf_len,
+						&t->smart_threshold[i -
+							t->dcr_idx],
+						&t->smart[i - t->dcr_idx],
+						&t->pdev.dev, t->dimm_dev[i]);
+			case ND_INTEL_SMART_INJECT:
+				return nfit_test_cmd_smart_inject(buf,
 						buf_len,
 						&t->smart_threshold[i -
 							t->dcr_idx],
···
 	set_bit(ND_INTEL_SMART, &acpi_desc->dimm_cmd_force_en);
 	set_bit(ND_INTEL_SMART_THRESHOLD, &acpi_desc->dimm_cmd_force_en);
 	set_bit(ND_INTEL_SMART_SET_THRESHOLD, &acpi_desc->dimm_cmd_force_en);
+	set_bit(ND_INTEL_SMART_INJECT, &acpi_desc->dimm_cmd_force_en);
 	set_bit(ND_CMD_ARS_CAP, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);

tools/testing/nvdimm/test/nfit_test.h

···
 #define ND_INTEL_FW_FINISH_UPDATE	15
 #define ND_INTEL_FW_FINISH_QUERY	16
 #define ND_INTEL_SMART_SET_THRESHOLD	17
+#define ND_INTEL_SMART_INJECT		18
 
 #define ND_INTEL_SMART_HEALTH_VALID             (1 << 0)
 #define ND_INTEL_SMART_SPARES_VALID             (1 << 1)
···
 #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)
+#define ND_INTEL_SMART_INJECT_MTEMP		(1 << 0)
+#define ND_INTEL_SMART_INJECT_SPARE		(1 << 1)
+#define ND_INTEL_SMART_INJECT_FATAL		(1 << 2)
+#define ND_INTEL_SMART_INJECT_SHUTDOWN		(1 << 3)
 
 struct nd_intel_smart {
 	__u32 status;
···
 	__u8 spares;
 	__u16 media_temperature;
 	__u16 ctrl_temperature;
+	__u32 status;
+} __packed;
+
+struct nd_intel_smart_inject {
+	__u64 flags;
+	__u8 mtemp_enable;
+	__u16 media_temperature;
+	__u8 spare_enable;
+	__u8 spares;
+	__u8 fatal_enable;
+	__u8 unsafe_shutdown_enable;
 	__u32 status;
 } __packed;