tools/testing/nvdimm: Add overwrite support for nfit_test

With the implementation of Intel NVDIMM DSM overwrite, we are adding unit
test to nfit_test for testing of overwrite operation.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

tools/testing/nvdimm/test/nfit.c

@@ -145,6 +145,7 @@ static int dimm_fail_cmd_code[ARRAY_SIZE(handle)];
 struct nfit_test_sec {
 	u8 state;
 	u8 passphrase[32];
+	u64 overwrite_end_time;
 } dimm_sec_info[NUM_DCR];
 
 static const struct nd_intel_smart smart_def = {
@@ -1069,6 +1070,50 @@ static int nd_intel_test_cmd_secure_erase(struct nfit_test *t,
 	return 0;
 }
 
+static int nd_intel_test_cmd_overwrite(struct nfit_test *t,
+		struct nd_intel_overwrite *nd_cmd,
+		unsigned int buf_len, int dimm)
+{
+	struct device *dev = &t->pdev.dev;
+	struct nfit_test_sec *sec = &dimm_sec_info[dimm];
+
+	if ((sec->state & ND_INTEL_SEC_STATE_ENABLED) &&
+			memcmp(nd_cmd->passphrase, sec->passphrase,
+				ND_INTEL_PASSPHRASE_SIZE) != 0) {
+		nd_cmd->status = ND_INTEL_STATUS_INVALID_PASS;
+		dev_dbg(dev, "overwrite: wrong passphrase\n");
+		return 0;
+	}
+
+	memset(sec->passphrase, 0, ND_INTEL_PASSPHRASE_SIZE);
+	sec->state = ND_INTEL_SEC_STATE_OVERWRITE;
+	dev_dbg(dev, "overwrite progressing.\n");
+	sec->overwrite_end_time = get_jiffies_64() + 5 * HZ;
+
+	return 0;
+}
+
+static int nd_intel_test_cmd_query_overwrite(struct nfit_test *t,
+		struct nd_intel_query_overwrite *nd_cmd,
+		unsigned int buf_len, int dimm)
+{
+	struct device *dev = &t->pdev.dev;
+	struct nfit_test_sec *sec = &dimm_sec_info[dimm];
+
+	if (!(sec->state & ND_INTEL_SEC_STATE_OVERWRITE)) {
+		nd_cmd->status = ND_INTEL_STATUS_OQUERY_SEQUENCE_ERR;
+		return 0;
+	}
+
+	if (time_is_before_jiffies64(sec->overwrite_end_time)) {
+		sec->overwrite_end_time = 0;
+		sec->state = 0;
+		dev_dbg(dev, "overwrite is complete\n");
+	} else
+		nd_cmd->status = ND_INTEL_STATUS_OQUERY_INPROGRESS;
+	return 0;
+}
+
 static int get_dimm(struct nfit_mem *nfit_mem, unsigned int func)
 {
 	int i;
@@ -1140,6 +1185,14 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 				rc = nd_intel_test_cmd_secure_erase(t,
 						buf, buf_len, i);
 				break;
+			case NVDIMM_INTEL_OVERWRITE:
+				rc = nd_intel_test_cmd_overwrite(t,
+						buf, buf_len, i - t->dcr_idx);
+				break;
+			case NVDIMM_INTEL_QUERY_OVERWRITE:
+				rc = nd_intel_test_cmd_query_overwrite(t,
+						buf, buf_len, i - t->dcr_idx);
+				break;
 			case ND_INTEL_ENABLE_LSS_STATUS:
 				rc = nd_intel_test_cmd_set_lss_status(t,
 						buf, buf_len);
@@ -2375,6 +2428,8 @@ static void nfit_test0_setup(struct nfit_test *t)
 	set_bit(NVDIMM_INTEL_UNLOCK_UNIT, &acpi_desc->dimm_cmd_force_en);
 	set_bit(NVDIMM_INTEL_FREEZE_LOCK, &acpi_desc->dimm_cmd_force_en);
 	set_bit(NVDIMM_INTEL_SECURE_ERASE, &acpi_desc->dimm_cmd_force_en);
+	set_bit(NVDIMM_INTEL_OVERWRITE, &acpi_desc->dimm_cmd_force_en);
+	set_bit(NVDIMM_INTEL_QUERY_OVERWRITE, &acpi_desc->dimm_cmd_force_en);
 }
 
 static void nfit_test1_setup(struct nfit_test *t)