diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 09ec846fe01d90bbee09460c25818001d3201c96..18b713a616de900c42cfb123332a0abeeb161d67 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -4,7 +4,7 @@
*
* Module interface and handling of zfcp data structures.
*
- * Copyright IBM Corp. 2002, 2018
+ * Copyright IBM Corp. 2002, 2020
*/
/*
@@ -415,8 +415,7 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
adapter->stat_read_buf_num = FSF_STATUS_READS_RECOM;
- if (!zfcp_scsi_adapter_register(adapter))
- return adapter;
+ return adapter;
failed:
zfcp_adapter_unregister(adapter);
diff --git a/drivers/s390/scsi/zfcp_diag.h b/drivers/s390/scsi/zfcp_diag.h
index b9c93d15f67c76a271c910dc3b97fdbba95c3de7..3852367f15f60445753d3acee6b7529137ad81c2 100644
--- a/drivers/s390/scsi/zfcp_diag.h
+++ b/drivers/s390/scsi/zfcp_diag.h
@@ -4,7 +4,7 @@
*
* Definitions for handling diagnostics in the the zfcp device driver.
*
- * Copyright IBM Corp. 2018
+ * Copyright IBM Corp. 2018, 2020
*/
#ifndef ZFCP_DIAG_H
@@ -56,11 +56,11 @@ struct zfcp_diag_adapter {
unsigned long max_age;
- struct {
+ struct zfcp_diag_adapter_port_data {
struct zfcp_diag_header header;
struct fsf_qtcb_bottom_port data;
} port_data;
- struct {
+ struct zfcp_diag_adapter_config_data {
struct zfcp_diag_header header;
struct fsf_qtcb_bottom_config data;
} config_data;
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 283bcb985655d99da17e3e009143353f8f4282ae..db320dab1fee20964037989a96bf8b13bcd46906 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -14,6 +14,7 @@
#include <linux/bug.h>
#include "zfcp_ext.h"
#include "zfcp_reqlist.h"
+#include "zfcp_diag.h"
#define ZFCP_MAX_ERPS 3
@@ -804,6 +805,59 @@ static enum zfcp_erp_act_result zfcp_erp_adapter_strategy_open_fsf_xport(
return ZFCP_ERP_SUCCEEDED;
}
+static enum zfcp_erp_act_result
+zfcp_erp_adapter_strategy_alloc_shost(struct zfcp_adapter *const adapter)
+{
+ struct zfcp_diag_adapter_config_data *const config_data =
+ &adapter->diagnostics->config_data;
+ struct zfcp_diag_adapter_port_data *const port_data =
+ &adapter->diagnostics->port_data;
+ unsigned long flags;
+ int rc;
+
+ rc = zfcp_scsi_adapter_register(adapter);
+ if (rc == -EEXIST)
+ return ZFCP_ERP_SUCCEEDED;
+ else if (rc)
+ return ZFCP_ERP_FAILED;
+
+ /*
+ * We allocated the shost for the first time. Before it was NULL,
+ * and so we deferred all updates in the xconf- and xport-data
+ * handlers. We need to make up for that now, and make all the updates
+ * that would have been done before.
+ *
+ * We can be sure that xconf- and xport-data succeeded, because
+ * otherwise this function is not called. But they might have been
+ * incomplete.
+ */
+
+ spin_lock_irqsave(&config_data->header.access_lock, flags);
+ zfcp_scsi_shost_update_config_data(adapter, &config_data->data,
+ !!config_data->header.incomplete);
+ spin_unlock_irqrestore(&config_data->header.access_lock, flags);
+
+ if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
+ spin_lock_irqsave(&port_data->header.access_lock, flags);
+ zfcp_scsi_shost_update_port_data(adapter, &port_data->data);
+ spin_unlock_irqrestore(&port_data->header.access_lock, flags);
+ }
+
+ /*
+ * There is a remote possibility that the 'Exchange Port Data' request
+ * reports a different connectivity status than 'Exchange Config Data'.
+ * But any change to the connectivity status of the local optic that
+ * happens after the initial xconf request is expected to be reported
+ * to us, as soon as we post Status Read Buffers to the FCP channel
+ * firmware after this function. So any resulting inconsistency will
+ * only be momentary.
+ */
+ if (config_data->header.incomplete)
+ zfcp_fsf_fc_host_link_down(adapter);
+
+ return ZFCP_ERP_SUCCEEDED;
+}
+
static enum zfcp_erp_act_result zfcp_erp_adapter_strategy_open_fsf(
struct zfcp_erp_action *act)
{
@@ -813,6 +867,10 @@ static enum zfcp_erp_act_result zfcp_erp_adapter_strategy_open_fsf(
if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
return ZFCP_ERP_FAILED;
+ if (zfcp_erp_adapter_strategy_alloc_shost(act->adapter) ==
+ ZFCP_ERP_FAILED)
+ return ZFCP_ERP_FAILED;
+
zfcp_erp_adapter_strategy_open_ptp_port(act->adapter);
if (mempool_resize(act->adapter->pool.sr_data,
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 5dc9bdc5803fa606a47350b7a7247c02d8aed352..3ef5d74331c3062413ce49d7b2b5d2bcc60e5022 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -135,6 +135,7 @@ extern int zfcp_fsf_send_els(struct zfcp_adapter *, u32,
struct zfcp_fsf_ct_els *, unsigned int);
extern int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *);
extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
+extern void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter);
extern struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev,
u8 tm_flags);
extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *);
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 8c4b690e329ed49de679b199cf17cea59f949743..c795f22249d8ff03665494e1f9e55aa5166fb6bb 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -120,7 +120,7 @@ static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
read_unlock_irqrestore(&adapter->port_list_lock, flags);
}
-static void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter)
+void zfcp_fsf_fc_host_link_down(struct zfcp_adapter *adapter)
{
struct Scsi_Host *shost = adapter->scsi_host;
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index f98e4015a0edebcb5a97b89ee80a54805ac694f1..d58bf79892f20c7240d7556abfba3f9ba6fc1960 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -451,26 +451,39 @@ static struct scsi_host_template zfcp_scsi_host_template = {
};
/**
- * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
+ * zfcp_scsi_adapter_register() - Allocate and register SCSI and FC host with
+ * SCSI midlayer
* @adapter: The zfcp adapter to register with the SCSI midlayer
+ *
+ * Allocates the SCSI host object for the given adapter, sets basic properties
+ * (such as the transport template, QDIO limits, ...), and registers it with
+ * the midlayer.
+ *
+ * During registration with the midlayer the corresponding FC host object for
+ * the referenced transport class is also implicitely allocated.
+ *
+ * Upon success adapter->scsi_host is set, and upon failure it remains NULL. If
+ * adapter->scsi_host is already set, nothing is done.
+ *
+ * Return:
+ * * 0 - Allocation and registration was successful
+ * * -EEXIST - SCSI and FC host did already exist, nothing was done, nothing
+ * was changed
+ * * -EIO - Allocation or registration failed
*/
int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
{
struct ccw_dev_id dev_id;
if (adapter->scsi_host)
- return 0;
+ return -EEXIST;
ccw_device_get_id(adapter->ccw_device, &dev_id);
/* register adapter as SCSI host with mid layer of SCSI stack */
adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
sizeof (struct zfcp_adapter *));
- if (!adapter->scsi_host) {
- dev_err(&adapter->ccw_device->dev,
- "Registering the FCP device with the "
- "SCSI stack failed\n");
- return -EIO;
- }
+ if (!adapter->scsi_host)
+ goto err_out;
/* tell the SCSI stack some characteristics of this adapter */
adapter->scsi_host->max_id = 511;
@@ -480,14 +493,23 @@ int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
adapter->scsi_host->transportt = zfcp_scsi_transport_template;
+ /* make all basic properties known at registration time */
+ zfcp_qdio_shost_update(adapter, adapter->qdio);
+ zfcp_scsi_set_prot(adapter);
+
adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
scsi_host_put(adapter->scsi_host);
- return -EIO;
+ goto err_out;
}
return 0;
+err_out:
+ adapter->scsi_host = NULL;
+ dev_err(&adapter->ccw_device->dev,
+ "Registering the FCP device with the SCSI stack failed\n");
+ return -EIO;
}
/**