+/**
+ * mpi3mr_free_enclosure_list - release enclosures
+ * @mrioc: Adapter instance reference
+ *
+ * Free memory allocated during encloure add.
+ *
+ * Return nothing.
+ */
+void mpi3mr_free_enclosure_list(struct mpi3mr_ioc *mrioc)
+{
+ struct mpi3mr_enclosure_node *enclosure_dev, *enclosure_dev_next;
+
+ list_for_each_entry_safe(enclosure_dev,
+ enclosure_dev_next, &mrioc->enclosure_list, list) {
+ list_del(&enclosure_dev->list);
+ kfree(enclosure_dev);
+ }
+}
+
+/**
+ * mpi3mr_enclosure_find_by_handle - enclosure search by handle
+ * @mrioc: Adapter instance reference
+ * @handle: Firmware device handle of the enclosure
+ *
+ * This searches for enclosure device based on handle, then returns the
+ * enclosure object.
+ *
+ * Return: Enclosure object reference or NULL
+ */
+struct mpi3mr_enclosure_node *mpi3mr_enclosure_find_by_handle(
+ struct mpi3mr_ioc *mrioc, u16 handle)
+{
+ struct mpi3mr_enclosure_node *enclosure_dev, *r = NULL;
+
+ list_for_each_entry(enclosure_dev, &mrioc->enclosure_list, list) {
+ if (le16_to_cpu(enclosure_dev->pg0.enclosure_handle) != handle)
+ continue;
+ r = enclosure_dev;
+ goto out;
+ }
+out:
+ return r;
+}
+
+/**
+ * mpi3mr_encldev_add_chg_evt_debug - debug for enclosure event
+ * @mrioc: Adapter instance reference
+ * @encl_pg0: Enclosure page 0.
+ * @is_added: Added event or not
+ *
+ * Return nothing.
+ */
+static void mpi3mr_encldev_add_chg_evt_debug(struct mpi3mr_ioc *mrioc,
+ struct mpi3_enclosure_page0 *encl_pg0, u8 is_added)
+{
+ char *reason_str = NULL;
+
+ if (!(mrioc->logging_level & MPI3_DEBUG_EVENT_WORK_TASK))
+ return;
+
+ if (is_added)
+ reason_str = "enclosure added";
+ else
+ reason_str = "enclosure dev status changed";
+
+ ioc_info(mrioc,
+ "%s: handle(0x%04x), enclosure logical id(0x%016llx)\n",
+ reason_str, le16_to_cpu(encl_pg0->enclosure_handle),
+ (unsigned long long)le64_to_cpu(encl_pg0->enclosure_logical_id));
+ ioc_info(mrioc,
+ "number of slots(%d), port(%d), flags(0x%04x), present(%d)\n",
+ le16_to_cpu(encl_pg0->num_slots), encl_pg0->io_unit_port,
+ le16_to_cpu(encl_pg0->flags),
+ ((le16_to_cpu(encl_pg0->flags) &
+ MPI3_ENCLS0_FLAGS_ENCL_DEV_PRESENT_MASK) >> 4));
+}
+
+/**
+ * mpi3mr_encldev_add_chg_evt_bh - Enclosure evt bottomhalf
+ * @mrioc: Adapter instance reference
+ * @fwevt: Firmware event reference
+ *
+ * Prints information about the Enclosure device status or
+ * Enclosure add events if logging is enabled and add or remove
+ * the enclosure from the controller's internal list of
+ * enclosures.
+ *
+ * Return: Nothing.
+ */
+static void mpi3mr_encldev_add_chg_evt_bh(struct mpi3mr_ioc *mrioc,
+ struct mpi3mr_fwevt *fwevt)
+{
+ struct mpi3mr_enclosure_node *enclosure_dev = NULL;
+ struct mpi3_enclosure_page0 *encl_pg0;
+ u16 encl_handle;
+ u8 added, present;
+
+ encl_pg0 = (struct mpi3_enclosure_page0 *) fwevt->event_data;
+ added = (fwevt->event_id == MPI3_EVENT_ENCL_DEVICE_ADDED) ? 1 : 0;
+ mpi3mr_encldev_add_chg_evt_debug(mrioc, encl_pg0, added);
+
+
+ encl_handle = le16_to_cpu(encl_pg0->enclosure_handle);
+ present = ((le16_to_cpu(encl_pg0->flags) &
+ MPI3_ENCLS0_FLAGS_ENCL_DEV_PRESENT_MASK) >> 4);
+
+ if (encl_handle)
+ enclosure_dev = mpi3mr_enclosure_find_by_handle(mrioc,
+ encl_handle);
+ if (!enclosure_dev && present) {
+ enclosure_dev =
+ kzalloc(sizeof(struct mpi3mr_enclosure_node),
+ GFP_KERNEL);
+ if (!enclosure_dev)
+ return;
+ list_add_tail(&enclosure_dev->list,
+ &mrioc->enclosure_list);
+ }
+ if (enclosure_dev) {
+ if (!present) {
+ list_del(&enclosure_dev->list);
+ kfree(enclosure_dev);
+ } else
+ memcpy(&enclosure_dev->pg0, encl_pg0,
+ sizeof(enclosure_dev->pg0));
+
+ }
+}
+