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-rw-r--r--drivers/nvdimm/core.c149
-rw-r--r--drivers/nvdimm/dimm_devs.c115
-rw-r--r--drivers/nvdimm/nd-core.h1
3 files changed, 265 insertions, 0 deletions
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index fe9bd6febdd2..c21ba0602029 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -4,6 +4,7 @@
*/
#include <linux/libnvdimm.h>
#include <linux/badblocks.h>
+#include <linux/suspend.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/blkdev.h>
@@ -389,8 +390,156 @@ static const struct attribute_group nvdimm_bus_attribute_group = {
.attrs = nvdimm_bus_attributes,
};
+static ssize_t capability_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+ enum nvdimm_fwa_capability cap;
+
+ if (!nd_desc->fw_ops)
+ return -EOPNOTSUPP;
+
+ nvdimm_bus_lock(dev);
+ cap = nd_desc->fw_ops->capability(nd_desc);
+ nvdimm_bus_unlock(dev);
+
+ switch (cap) {
+ case NVDIMM_FWA_CAP_QUIESCE:
+ return sprintf(buf, "quiesce\n");
+ case NVDIMM_FWA_CAP_LIVE:
+ return sprintf(buf, "live\n");
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static DEVICE_ATTR_RO(capability);
+
+static ssize_t activate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+ enum nvdimm_fwa_capability cap;
+ enum nvdimm_fwa_state state;
+
+ if (!nd_desc->fw_ops)
+ return -EOPNOTSUPP;
+
+ nvdimm_bus_lock(dev);
+ cap = nd_desc->fw_ops->capability(nd_desc);
+ state = nd_desc->fw_ops->activate_state(nd_desc);
+ nvdimm_bus_unlock(dev);
+
+ if (cap < NVDIMM_FWA_CAP_QUIESCE)
+ return -EOPNOTSUPP;
+
+ switch (state) {
+ case NVDIMM_FWA_IDLE:
+ return sprintf(buf, "idle\n");
+ case NVDIMM_FWA_BUSY:
+ return sprintf(buf, "busy\n");
+ case NVDIMM_FWA_ARMED:
+ return sprintf(buf, "armed\n");
+ case NVDIMM_FWA_ARM_OVERFLOW:
+ return sprintf(buf, "overflow\n");
+ default:
+ return -ENXIO;
+ }
+}
+
+static int exec_firmware_activate(void *data)
+{
+ struct nvdimm_bus_descriptor *nd_desc = data;
+
+ return nd_desc->fw_ops->activate(nd_desc);
+}
+
+static ssize_t activate_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+ enum nvdimm_fwa_state state;
+ bool quiesce;
+ ssize_t rc;
+
+ if (!nd_desc->fw_ops)
+ return -EOPNOTSUPP;
+
+ if (sysfs_streq(buf, "live"))
+ quiesce = false;
+ else if (sysfs_streq(buf, "quiesce"))
+ quiesce = true;
+ else
+ return -EINVAL;
+
+ nvdimm_bus_lock(dev);
+ state = nd_desc->fw_ops->activate_state(nd_desc);
+
+ switch (state) {
+ case NVDIMM_FWA_BUSY:
+ rc = -EBUSY;
+ break;
+ case NVDIMM_FWA_ARMED:
+ case NVDIMM_FWA_ARM_OVERFLOW:
+ if (quiesce)
+ rc = hibernate_quiet_exec(exec_firmware_activate, nd_desc);
+ else
+ rc = nd_desc->fw_ops->activate(nd_desc);
+ break;
+ case NVDIMM_FWA_IDLE:
+ default:
+ rc = -ENXIO;
+ }
+ nvdimm_bus_unlock(dev);
+
+ if (rc == 0)
+ rc = len;
+ return rc;
+}
+
+static DEVICE_ATTR_ADMIN_RW(activate);
+
+static umode_t nvdimm_bus_firmware_visible(struct kobject *kobj, struct attribute *a, int n)
+{
+ struct device *dev = container_of(kobj, typeof(*dev), kobj);
+ struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+ enum nvdimm_fwa_capability cap;
+
+ /*
+ * Both 'activate' and 'capability' disappear when no ops
+ * detected, or a negative capability is indicated.
+ */
+ if (!nd_desc->fw_ops)
+ return 0;
+
+ nvdimm_bus_lock(dev);
+ cap = nd_desc->fw_ops->capability(nd_desc);
+ nvdimm_bus_unlock(dev);
+
+ if (cap < NVDIMM_FWA_CAP_QUIESCE)
+ return 0;
+
+ return a->mode;
+}
+static struct attribute *nvdimm_bus_firmware_attributes[] = {
+ &dev_attr_activate.attr,
+ &dev_attr_capability.attr,
+ NULL,
+};
+
+static const struct attribute_group nvdimm_bus_firmware_attribute_group = {
+ .name = "firmware",
+ .attrs = nvdimm_bus_firmware_attributes,
+ .is_visible = nvdimm_bus_firmware_visible,
+};
+
const struct attribute_group *nvdimm_bus_attribute_groups[] = {
&nvdimm_bus_attribute_group,
+ &nvdimm_bus_firmware_attribute_group,
NULL,
};
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index b7b77e8d9027..85b53a7f44f2 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -446,9 +446,124 @@ static const struct attribute_group nvdimm_attribute_group = {
.is_visible = nvdimm_visible,
};
+static ssize_t result_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ enum nvdimm_fwa_result result;
+
+ if (!nvdimm->fw_ops)
+ return -EOPNOTSUPP;
+
+ nvdimm_bus_lock(dev);
+ result = nvdimm->fw_ops->activate_result(nvdimm);
+ nvdimm_bus_unlock(dev);
+
+ switch (result) {
+ case NVDIMM_FWA_RESULT_NONE:
+ return sprintf(buf, "none\n");
+ case NVDIMM_FWA_RESULT_SUCCESS:
+ return sprintf(buf, "success\n");
+ case NVDIMM_FWA_RESULT_FAIL:
+ return sprintf(buf, "fail\n");
+ case NVDIMM_FWA_RESULT_NOTSTAGED:
+ return sprintf(buf, "not_staged\n");
+ case NVDIMM_FWA_RESULT_NEEDRESET:
+ return sprintf(buf, "need_reset\n");
+ default:
+ return -ENXIO;
+ }
+}
+static DEVICE_ATTR_ADMIN_RO(result);
+
+static ssize_t activate_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ enum nvdimm_fwa_state state;
+
+ if (!nvdimm->fw_ops)
+ return -EOPNOTSUPP;
+
+ nvdimm_bus_lock(dev);
+ state = nvdimm->fw_ops->activate_state(nvdimm);
+ nvdimm_bus_unlock(dev);
+
+ switch (state) {
+ case NVDIMM_FWA_IDLE:
+ return sprintf(buf, "idle\n");
+ case NVDIMM_FWA_BUSY:
+ return sprintf(buf, "busy\n");
+ case NVDIMM_FWA_ARMED:
+ return sprintf(buf, "armed\n");
+ default:
+ return -ENXIO;
+ }
+}
+
+static ssize_t activate_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ enum nvdimm_fwa_trigger arg;
+ int rc;
+
+ if (!nvdimm->fw_ops)
+ return -EOPNOTSUPP;
+
+ if (sysfs_streq(buf, "arm"))
+ arg = NVDIMM_FWA_ARM;
+ else if (sysfs_streq(buf, "disarm"))
+ arg = NVDIMM_FWA_DISARM;
+ else
+ return -EINVAL;
+
+ nvdimm_bus_lock(dev);
+ rc = nvdimm->fw_ops->arm(nvdimm, arg);
+ nvdimm_bus_unlock(dev);
+
+ if (rc < 0)
+ return rc;
+ return len;
+}
+static DEVICE_ATTR_ADMIN_RW(activate);
+
+static struct attribute *nvdimm_firmware_attributes[] = {
+ &dev_attr_activate.attr,
+ &dev_attr_result.attr,
+};
+
+static umode_t nvdimm_firmware_visible(struct kobject *kobj, struct attribute *a, int n)
+{
+ struct device *dev = container_of(kobj, typeof(*dev), kobj);
+ struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
+ struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+ enum nvdimm_fwa_capability cap;
+
+ if (!nd_desc->fw_ops)
+ return 0;
+ if (!nvdimm->fw_ops)
+ return 0;
+
+ nvdimm_bus_lock(dev);
+ cap = nd_desc->fw_ops->capability(nd_desc);
+ nvdimm_bus_unlock(dev);
+
+ if (cap < NVDIMM_FWA_CAP_QUIESCE)
+ return 0;
+
+ return a->mode;
+}
+
+static const struct attribute_group nvdimm_firmware_attribute_group = {
+ .name = "firmware",
+ .attrs = nvdimm_firmware_attributes,
+ .is_visible = nvdimm_firmware_visible,
+};
+
static const struct attribute_group *nvdimm_attribute_groups[] = {
&nd_device_attribute_group,
&nvdimm_attribute_group,
+ &nvdimm_firmware_attribute_group,
NULL,
};
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index ddb9d97d9129..564faa36a3ca 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -45,6 +45,7 @@ struct nvdimm {
struct kernfs_node *overwrite_state;
} sec;
struct delayed_work dwork;
+ const struct nvdimm_fw_ops *fw_ops;
};
static inline unsigned long nvdimm_security_flags(
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 07:42:17 +0000