ndtest: Add dimm attributes

This patch adds sysfs attributes for nvdimm and the dimm device.

Signed-off-by: Santosh Sivaraj <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dan Williams <[e-mail]>

tools/testing/nvdimm/test/ndtest.c

···
 		}
 }
 
+static ssize_t handle_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct ndtest_dimm *dimm = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%#x\n", dimm->handle);
+}
+static DEVICE_ATTR_RO(handle);
+
+static ssize_t fail_cmd_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct ndtest_dimm *dimm = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%#x\n", dimm->fail_cmd);
+}
+
+static ssize_t fail_cmd_store(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t size)
+{
+	struct ndtest_dimm *dimm = dev_get_drvdata(dev);
+	unsigned long val;
+	ssize_t rc;
+
+	rc = kstrtol(buf, 0, &val);
+	if (rc)
+		return rc;
+
+	dimm->fail_cmd = val;
+
+	return size;
+}
+static DEVICE_ATTR_RW(fail_cmd);
+
+static ssize_t fail_cmd_code_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct ndtest_dimm *dimm = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%d\n", dimm->fail_cmd_code);
+}
+
+static ssize_t fail_cmd_code_store(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t size)
+{
+	struct ndtest_dimm *dimm = dev_get_drvdata(dev);
+	unsigned long val;
+	ssize_t rc;
+
+	rc = kstrtol(buf, 0, &val);
+	if (rc)
+		return rc;
+
+	dimm->fail_cmd_code = val;
+	return size;
+}
+static DEVICE_ATTR_RW(fail_cmd_code);
+
+static struct attribute *dimm_attributes[] = {
+	&dev_attr_handle.attr,
+	&dev_attr_fail_cmd.attr,
+	&dev_attr_fail_cmd_code.attr,
+	NULL,
+};
+
+static struct attribute_group dimm_attribute_group = {
+	.attrs = dimm_attributes,
+};
+
+static const struct attribute_group *dimm_attribute_groups[] = {
+	&dimm_attribute_group,
+	NULL,
+};
+
+static ssize_t phys_id_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm);
+
+	return sprintf(buf, "%#x\n", dimm->physical_id);
+}
+static DEVICE_ATTR_RO(phys_id);
+
+static ssize_t vendor_show(struct device *dev,
+			   struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "0x1234567\n");
+}
+static DEVICE_ATTR_RO(vendor);
+
+static ssize_t id_show(struct device *dev,
+		       struct device_attribute *attr, char *buf)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm);
+
+	return sprintf(buf, "%04x-%02x-%04x-%08x", 0xabcd,
+		       0xa, 2016, ~(dimm->handle));
+}
+static DEVICE_ATTR_RO(id);
+
+static ssize_t nvdimm_handle_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm);
+
+	return sprintf(buf, "%#x\n", dimm->handle);
+}
+
+static struct device_attribute dev_attr_nvdimm_show_handle =  {
+	.attr	= { .name = "handle", .mode = 0444 },
+	.show	= nvdimm_handle_show,
+};
+
+static ssize_t subsystem_vendor_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "0x%04x\n", 0);
+}
+static DEVICE_ATTR_RO(subsystem_vendor);
+
+static ssize_t dirty_shutdown_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", 42);
+}
+static DEVICE_ATTR_RO(dirty_shutdown);
+
+static ssize_t formats_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm);
+
+	return sprintf(buf, "%d\n", dimm->num_formats);
+}
+static DEVICE_ATTR_RO(formats);
+
+static ssize_t format_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm);
+
+	if (dimm->num_formats > 1)
+		return sprintf(buf, "0x201\n");
+
+	return sprintf(buf, "0x101\n");
+}
+static DEVICE_ATTR_RO(format);
+
+static ssize_t format1_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	return sprintf(buf, "0x301\n");
+}
+static DEVICE_ATTR_RO(format1);
+
+static umode_t ndtest_nvdimm_attr_visible(struct kobject *kobj,
+					struct attribute *a, int n)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+	struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm);
+
+	if (a == &dev_attr_format1.attr && dimm->num_formats <= 1)
+		return 0;
+
+	return a->mode;
+}
+
+static struct attribute *ndtest_nvdimm_attributes[] = {
+	&dev_attr_nvdimm_show_handle.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_id.attr,
+	&dev_attr_phys_id.attr,
+	&dev_attr_subsystem_vendor.attr,
+	&dev_attr_dirty_shutdown.attr,
+	&dev_attr_formats.attr,
+	&dev_attr_format.attr,
+	&dev_attr_format1.attr,
+	NULL,
+};
+
+static const struct attribute_group ndtest_nvdimm_attribute_group = {
+	.name = "papr",
+	.attrs = ndtest_nvdimm_attributes,
+	.is_visible = ndtest_nvdimm_attr_visible,
+};
+
+static const struct attribute_group *ndtest_nvdimm_attribute_groups[] = {
+	&ndtest_nvdimm_attribute_group,
+	NULL,
+};
+
 static int ndtest_dimm_register(struct ndtest_priv *priv,
 				struct ndtest_dimm *dimm, int id)
 {
···
 		set_bit(NDD_LABELING, &dimm_flags);
 	}
 
-	dimm->nvdimm = nvdimm_create(priv->bus, dimm, NULL, dimm_flags,
+	dimm->nvdimm = nvdimm_create(priv->bus, dimm,
+				    ndtest_nvdimm_attribute_groups, dimm_flags,
 				    NDTEST_SCM_DIMM_CMD_MASK, 0, NULL);
 	if (!dimm->nvdimm) {
 		dev_err(dev, "Error creating DIMM object for %pOF\n", priv->dn);
···
 
 	dimm->dev = device_create_with_groups(ndtest_dimm_class,
 					     &priv->pdev.dev,
-					     0, dimm, NULL,
+					     0, dimm, dimm_attribute_groups,
 					     "test_dimm%d", id);
 	if (!dimm->dev) {
 		pr_err("Could not create dimm device attributes\n");