[S390] qdio: new qdio driver.
List of major changes:
- split qdio driver into several files
- seperation of thin interrupt code
- improved handling for multiple thin interrupt devices
- inbound and outbound processing now always runs in tasklet context
- significant less tasklet schedules per interrupt needed
- merged qebsm with non-qebsm handling
- cleanup qdio interface and added kerneldoc
- coding style
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com>
Reviewed-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index 36169c6..fca48b8 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -297,15 +297,13 @@
/**
* zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
* @adapter: adapter affected by this QDIO related event
- * @status: as passed by qdio module
* @qdio_error: as passed by qdio module
- * @siga_error: as passed by qdio module
* @sbal_index: first buffer with error condition, as passed by qdio module
* @sbal_count: number of buffers affected, as passed by qdio module
*/
-void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter, unsigned int status,
- unsigned int qdio_error, unsigned int siga_error,
- int sbal_index, int sbal_count)
+void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
+ unsigned int qdio_error, int sbal_index,
+ int sbal_count)
{
struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
unsigned long flags;
@@ -313,9 +311,7 @@
spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
memset(r, 0, sizeof(*r));
strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
- r->u.qdio.status = status;
r->u.qdio.qdio_error = qdio_error;
- r->u.qdio.siga_error = siga_error;
r->u.qdio.sbal_index = sbal_index;
r->u.qdio.sbal_count = sbal_count;
debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
@@ -398,9 +394,7 @@
static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
{
- zfcp_dbf_out(p, "status", "0x%08x", r->status);
zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
- zfcp_dbf_out(p, "siga_error", "0x%08x", r->siga_error);
zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
}
diff --git a/drivers/s390/scsi/zfcp_dbf.h b/drivers/s390/scsi/zfcp_dbf.h
index d04aea6..0ddb184 100644
--- a/drivers/s390/scsi/zfcp_dbf.h
+++ b/drivers/s390/scsi/zfcp_dbf.h
@@ -139,9 +139,7 @@
} __attribute__ ((packed));
struct zfcp_hba_dbf_record_qdio {
- u32 status;
u32 qdio_error;
- u32 siga_error;
u8 sbal_index;
u8 sbal_count;
} __attribute__ ((packed));
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 8065b2b..edfdb21 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -48,9 +48,8 @@
extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *);
extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *,
struct fsf_status_read_buffer *);
-extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *,
- unsigned int, unsigned int, unsigned int,
- int, int);
+extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *, unsigned int, int,
+ int);
extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *);
extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *);
extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *);
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 72e3094..d6dbd65 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -74,17 +74,15 @@
}
}
-static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int status,
- unsigned int qdio_err, unsigned int siga_err,
- unsigned int queue_no, int first, int count,
+static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err,
+ int queue_no, int first, int count,
unsigned long parm)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
struct zfcp_qdio_queue *queue = &adapter->req_q;
- if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) {
- zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err,
- first, count);
+ if (unlikely(qdio_err)) {
+ zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
zfcp_qdio_handler_error(adapter, 140);
return;
}
@@ -129,8 +127,7 @@
count = atomic_read(&queue->count) + processed;
- retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT,
- 0, start, count, NULL);
+ retval = do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, start, count);
if (unlikely(retval)) {
atomic_set(&queue->count, count);
@@ -142,9 +139,8 @@
}
}
-static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int status,
- unsigned int qdio_err, unsigned int siga_err,
- unsigned int queue_no, int first, int count,
+static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err,
+ int queue_no, int first, int count,
unsigned long parm)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
@@ -152,9 +148,8 @@
volatile struct qdio_buffer_element *sbale;
int sbal_idx, sbale_idx, sbal_no;
- if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) {
- zfcp_hba_dbf_event_qdio(adapter, status, qdio_err, siga_err,
- first, count);
+ if (unlikely(qdio_err)) {
+ zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
zfcp_qdio_handler_error(adapter, 147);
return;
}
@@ -362,7 +357,7 @@
}
retval = do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, first,
- count, NULL);
+ count);
if (unlikely(retval)) {
zfcp_qdio_zero_sbals(req_q->sbal, first, count);
return retval;
@@ -400,10 +395,6 @@
init_data->qib_param_field = NULL;
init_data->input_slib_elements = NULL;
init_data->output_slib_elements = NULL;
- init_data->min_input_threshold = 1;
- init_data->max_input_threshold = 5000;
- init_data->min_output_threshold = 1;
- init_data->max_output_threshold = 1000;
init_data->no_input_qs = 1;
init_data->no_output_qs = 1;
init_data->input_handler = zfcp_qdio_int_resp;
@@ -436,9 +427,7 @@
atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
spin_unlock(&req_q->lock);
- while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)
- == -EINPROGRESS)
- ssleep(1);
+ qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
/* cleanup used outbound sbals */
count = atomic_read(&req_q->count);
@@ -473,7 +462,7 @@
return -EIO;
}
- if (qdio_activate(adapter->ccw_device, 0)) {
+ if (qdio_activate(adapter->ccw_device)) {
dev_err(&adapter->ccw_device->dev,
"Activate of QDIO queues failed.\n");
goto failed_qdio;
@@ -487,7 +476,7 @@
}
if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0,
- QDIO_MAX_BUFFERS_PER_Q, NULL)) {
+ QDIO_MAX_BUFFERS_PER_Q)) {
dev_err(&adapter->ccw_device->dev,
"Init of QDIO response queue failed.\n");
goto failed_qdio;
@@ -501,9 +490,6 @@
return 0;
failed_qdio:
- while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)
- == -EINPROGRESS)
- ssleep(1);
-
+ qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
return -EIO;
}