[SCSI] zfcp: introduce struct timer_list in struct zfcp_fsf_req
This instance will be used whenever a timer is needed for
a request by zfcp.
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 7f60b6f..af42a0e 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -64,8 +64,6 @@
static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int);
static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *);
-static void zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *);
-static void zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *);
static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *);
@@ -111,8 +109,62 @@
static inline void zfcp_erp_action_to_running(struct zfcp_erp_action *);
static void zfcp_erp_memwait_handler(unsigned long);
-static void zfcp_erp_timeout_handler(unsigned long);
-static inline void zfcp_erp_timeout_init(struct zfcp_erp_action *);
+
+/**
+ * zfcp_close_qdio - close qdio queues for an adapter
+ */
+static void zfcp_close_qdio(struct zfcp_adapter *adapter)
+{
+ struct zfcp_qdio_queue *req_queue;
+ int first, count;
+
+ if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status))
+ return;
+
+ /* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
+ req_queue = &adapter->request_queue;
+ write_lock_irq(&req_queue->queue_lock);
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
+ write_unlock_irq(&req_queue->queue_lock);
+
+ debug_text_event(adapter->erp_dbf, 3, "qdio_down2a");
+ while (qdio_shutdown(adapter->ccw_device,
+ QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS)
+ msleep(1000);
+ debug_text_event(adapter->erp_dbf, 3, "qdio_down2b");
+
+ /* cleanup used outbound sbals */
+ count = atomic_read(&req_queue->free_count);
+ if (count < QDIO_MAX_BUFFERS_PER_Q) {
+ first = (req_queue->free_index+count) % QDIO_MAX_BUFFERS_PER_Q;
+ count = QDIO_MAX_BUFFERS_PER_Q - count;
+ zfcp_qdio_zero_sbals(req_queue->buffer, first, count);
+ }
+ req_queue->free_index = 0;
+ atomic_set(&req_queue->free_count, 0);
+ req_queue->distance_from_int = 0;
+ adapter->response_queue.free_index = 0;
+ atomic_set(&adapter->response_queue.free_count, 0);
+}
+
+/**
+ * zfcp_close_fsf - stop FSF operations for an adapter
+ *
+ * Dismiss and cleanup all pending fsf_reqs (this wakes up all initiators of
+ * requests waiting for completion; especially this returns SCSI commands
+ * with error state).
+ */
+static void zfcp_close_fsf(struct zfcp_adapter *adapter)
+{
+ /* close queues to ensure that buffers are not accessed by adapter */
+ zfcp_close_qdio(adapter);
+ zfcp_fsf_req_dismiss_all(adapter);
+ /* reset FSF request sequence number */
+ adapter->fsf_req_seq_no = 0;
+ /* all ports and units are closed */
+ zfcp_erp_modify_adapter_status(adapter,
+ ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
+}
/**
* zfcp_fsf_request_timeout_handler - called if a request timed out
@@ -121,52 +173,20 @@
* This function needs to be called if requests (ELS, Generic Service,
* or SCSI commands) exceed a certain time limit. The assumption is
* that after the time limit the adapter get stuck. So we trigger a reopen of
- * the adapter. This should not be used for error recovery, SCSI abort
- * commands and SCSI requests from SCSI mid-layer.
+ * the adapter.
*/
-void
-zfcp_fsf_request_timeout_handler(unsigned long data)
+static void zfcp_fsf_request_timeout_handler(unsigned long data)
{
- struct zfcp_adapter *adapter;
-
- adapter = (struct zfcp_adapter *) data;
-
+ struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
zfcp_erp_adapter_reopen(adapter, 0);
}
-/**
- * zfcp_fsf_scsi_er_timeout_handler - timeout handler for scsi eh tasks
- *
- * This function needs to be called whenever a SCSI error recovery
- * action (abort/reset) does not return. Re-opening the adapter means
- * that the abort/reset command can be returned by zfcp. It won't complete
- * via the adapter anymore (because qdio queues are closed). If ERP is
- * already running on this adapter it will be stopped.
- */
-void zfcp_fsf_scsi_er_timeout_handler(unsigned long data)
+void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, unsigned long timeout)
{
- struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
- unsigned long flags;
-
- ZFCP_LOG_NORMAL("warning: SCSI error recovery timed out. "
- "Restarting all operations on the adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf, 1, "eh_lmem_tout");
-
- write_lock_irqsave(&adapter->erp_lock, flags);
- if (atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
- &adapter->status)) {
- zfcp_erp_modify_adapter_status(adapter,
- ZFCP_STATUS_COMMON_UNBLOCKED|ZFCP_STATUS_COMMON_OPEN,
- ZFCP_CLEAR);
- zfcp_erp_action_dismiss_adapter(adapter);
- write_unlock_irqrestore(&adapter->erp_lock, flags);
- /* dismiss all pending requests including requests for ERP */
- zfcp_fsf_req_dismiss_all(adapter);
- adapter->fsf_req_seq_no = 0;
- } else
- write_unlock_irqrestore(&adapter->erp_lock, flags);
- zfcp_erp_adapter_reopen(adapter, 0);
+ fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
+ fsf_req->timer.data = (unsigned long) fsf_req->adapter;
+ fsf_req->timer.expires = timeout;
+ add_timer(&fsf_req->timer);
}
/*
@@ -282,7 +302,6 @@
struct zfcp_ls_adisc *adisc;
void *address = NULL;
int retval = 0;
- struct timer_list *timer;
send_els = kzalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC);
if (send_els == NULL)
@@ -329,22 +348,11 @@
(wwn_t) adisc->wwnn, adisc->hard_nport_id,
adisc->nport_id);
- timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC);
- if (!timer)
- goto nomem;
-
- init_timer(timer);
- timer->function = zfcp_fsf_request_timeout_handler;
- timer->data = (unsigned long) adapter;
- timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
- send_els->timer = timer;
-
retval = zfcp_fsf_send_els(send_els);
if (retval != 0) {
ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port "
"0x%08x on adapter %s\n", send_els->d_id,
zfcp_get_busid_by_adapter(adapter));
- del_timer(send_els->timer);
goto freemem;
}
@@ -356,7 +364,6 @@
if (address != NULL)
__free_pages(send_els->req->page, 0);
if (send_els != NULL) {
- kfree(send_els->timer);
kfree(send_els->req);
kfree(send_els->resp);
kfree(send_els);
@@ -382,9 +389,6 @@
struct zfcp_ls_adisc_acc *adisc;
send_els = (struct zfcp_send_els *) data;
-
- del_timer(send_els->timer);
-
adapter = send_els->adapter;
port = send_els->port;
d_id = send_els->d_id;
@@ -433,7 +437,6 @@
out:
zfcp_port_put(port);
__free_pages(send_els->req->page, 0);
- kfree(send_els->timer);
kfree(send_els->req);
kfree(send_els->resp);
kfree(send_els);
@@ -909,8 +912,6 @@
debug_text_event(adapter->erp_dbf, 2, "a_asyh_ex");
debug_event(adapter->erp_dbf, 2, &erp_action->action,
sizeof (int));
- if (!(set_mask & ZFCP_STATUS_ERP_TIMEDOUT))
- del_timer(&erp_action->timer);
erp_action->status |= set_mask;
zfcp_erp_action_ready(erp_action);
} else {
@@ -957,8 +958,7 @@
* action gets an appropriate flag and will be processed
* accordingly
*/
-static void
-zfcp_erp_timeout_handler(unsigned long data)
+void zfcp_erp_timeout_handler(unsigned long data)
{
struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data;
struct zfcp_adapter *adapter = erp_action->adapter;
@@ -1934,8 +1934,7 @@
&erp_action->adapter->status);
failed_openfcp:
- zfcp_erp_adapter_strategy_close_qdio(erp_action);
- zfcp_erp_adapter_strategy_close_fsf(erp_action);
+ zfcp_close_fsf(erp_action->adapter);
failed_qdio:
out:
return retval;
@@ -2040,59 +2039,6 @@
return retval;
}
-/**
- * zfcp_erp_adapter_strategy_close_qdio - close qdio queues for an adapter
- */
-static void
-zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action)
-{
- int first_used;
- int used_count;
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
- ZFCP_LOG_DEBUG("error: attempt to shut down inactive QDIO "
- "queues on adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- return;
- }
-
- /*
- * Get queue_lock and clear QDIOUP flag. Thus it's guaranteed that
- * do_QDIO won't be called while qdio_shutdown is in progress.
- */
- write_lock_irq(&adapter->request_queue.queue_lock);
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
- write_unlock_irq(&adapter->request_queue.queue_lock);
-
- debug_text_event(adapter->erp_dbf, 3, "qdio_down2a");
- while (qdio_shutdown(adapter->ccw_device,
- QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS)
- msleep(1000);
- debug_text_event(adapter->erp_dbf, 3, "qdio_down2b");
-
- /*
- * First we had to stop QDIO operation.
- * Now it is safe to take the following actions.
- */
-
- /* Cleanup only necessary when there are unacknowledged buffers */
- if (atomic_read(&adapter->request_queue.free_count)
- < QDIO_MAX_BUFFERS_PER_Q) {
- first_used = (adapter->request_queue.free_index +
- atomic_read(&adapter->request_queue.free_count))
- % QDIO_MAX_BUFFERS_PER_Q;
- used_count = QDIO_MAX_BUFFERS_PER_Q -
- atomic_read(&adapter->request_queue.free_count);
- zfcp_qdio_zero_sbals(adapter->request_queue.buffer,
- first_used, used_count);
- }
- adapter->response_queue.free_index = 0;
- atomic_set(&adapter->response_queue.free_count, 0);
- adapter->request_queue.free_index = 0;
- atomic_set(&adapter->request_queue.free_count, 0);
- adapter->request_queue.distance_from_int = 0;
-}
static int
zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action)
@@ -2127,7 +2073,6 @@
write_lock_irq(&adapter->erp_lock);
zfcp_erp_action_to_running(erp_action);
write_unlock_irq(&adapter->erp_lock);
- zfcp_erp_timeout_init(erp_action);
if (zfcp_fsf_exchange_config_data(erp_action)) {
retval = ZFCP_ERP_FAILED;
debug_text_event(adapter->erp_dbf, 5, "a_fstx_xf");
@@ -2196,7 +2141,6 @@
zfcp_erp_action_to_running(erp_action);
write_unlock_irq(&adapter->erp_lock);
- zfcp_erp_timeout_init(erp_action);
ret = zfcp_fsf_exchange_port_data(erp_action, adapter, NULL);
if (ret == -EOPNOTSUPP) {
debug_text_event(adapter->erp_dbf, 3, "a_xport_notsupp");
@@ -2248,27 +2192,6 @@
return retval;
}
-/**
- * zfcp_erp_adapter_strategy_close_fsf - stop FSF operations for an adapter
- */
-static void
-zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *erp_action)
-{
- struct zfcp_adapter *adapter = erp_action->adapter;
-
- /*
- * wake waiting initiators of requests,
- * return SCSI commands (with error status),
- * clean up all requests (synchronously)
- */
- zfcp_fsf_req_dismiss_all(adapter);
- /* reset FSF request sequence number */
- adapter->fsf_req_seq_no = 0;
- /* all ports and units are closed */
- zfcp_erp_modify_adapter_status(adapter,
- ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
-}
-
/*
* function:
*
@@ -2605,7 +2528,6 @@
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_close_physical_port(erp_action);
if (retval == -ENOMEM) {
debug_text_event(adapter->erp_dbf, 5, "o_pfstc_nomem");
@@ -2662,7 +2584,6 @@
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_close_port(erp_action);
if (retval == -ENOMEM) {
debug_text_event(adapter->erp_dbf, 5, "p_pstc_nomem");
@@ -2700,7 +2621,6 @@
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_open_port(erp_action);
if (retval == -ENOMEM) {
debug_text_event(adapter->erp_dbf, 5, "p_psto_nomem");
@@ -2738,7 +2658,6 @@
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_port *port = erp_action->port;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_ns_gid_pn_request(erp_action);
if (retval == -ENOMEM) {
debug_text_event(adapter->erp_dbf, 5, "p_pstn_nomem");
@@ -2864,7 +2783,6 @@
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_unit *unit = erp_action->unit;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_close_unit(erp_action);
if (retval == -ENOMEM) {
debug_text_event(adapter->erp_dbf, 5, "u_ustc_nomem");
@@ -2905,7 +2823,6 @@
struct zfcp_adapter *adapter = erp_action->adapter;
struct zfcp_unit *unit = erp_action->unit;
- zfcp_erp_timeout_init(erp_action);
retval = zfcp_fsf_open_unit(erp_action);
if (retval == -ENOMEM) {
debug_text_event(adapter->erp_dbf, 5, "u_usto_nomem");
@@ -2930,14 +2847,13 @@
return retval;
}
-static inline void
-zfcp_erp_timeout_init(struct zfcp_erp_action *erp_action)
+void zfcp_erp_start_timer(struct zfcp_fsf_req *fsf_req)
{
- init_timer(&erp_action->timer);
- erp_action->timer.function = zfcp_erp_timeout_handler;
- erp_action->timer.data = (unsigned long) erp_action;
- /* jiffies will be added in zfcp_fsf_req_send */
- erp_action->timer.expires = ZFCP_ERP_FSFREQ_TIMEOUT;
+ BUG_ON(!fsf_req->erp_action);
+ fsf_req->timer.function = zfcp_erp_timeout_handler;
+ fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
+ fsf_req->timer.expires = jiffies + ZFCP_ERP_FSFREQ_TIMEOUT;
+ add_timer(&fsf_req->timer);
}
/*