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path: root/drivers/s390/scsi/zfcp_qdio.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_qdio.c')
-rw-r--r--drivers/s390/scsi/zfcp_qdio.c68
1 files changed, 31 insertions, 37 deletions
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 69d632d851d9..664752f90b20 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -28,7 +28,7 @@ static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
return 0;
}
-static volatile struct qdio_buffer_element *
+static struct qdio_buffer_element *
zfcp_qdio_sbale(struct zfcp_qdio_queue *q, int sbal_idx, int sbale_idx)
{
return &q->sbal[sbal_idx]->element[sbale_idx];
@@ -57,7 +57,7 @@ void zfcp_qdio_free(struct zfcp_adapter *adapter)
static void zfcp_qdio_handler_error(struct zfcp_adapter *adapter, u8 id)
{
- dev_warn(&adapter->ccw_device->dev, "QDIO problem occurred.\n");
+ dev_warn(&adapter->ccw_device->dev, "A QDIO problem occurred\n");
zfcp_erp_adapter_reopen(adapter,
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
@@ -115,6 +115,7 @@ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter,
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
fsf_req->sbal_response = sbal_idx;
+ fsf_req->qdio_inb_usage = atomic_read(&adapter->resp_q.count);
zfcp_fsf_req_complete(fsf_req);
}
@@ -145,7 +146,7 @@ static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err,
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
struct zfcp_qdio_queue *queue = &adapter->resp_q;
- volatile struct qdio_buffer_element *sbale;
+ struct qdio_buffer_element *sbale;
int sbal_idx, sbale_idx, sbal_no;
if (unlikely(qdio_err)) {
@@ -174,8 +175,8 @@ static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err,
if (unlikely(!(sbale->flags & SBAL_FLAGS_LAST_ENTRY)))
dev_warn(&adapter->ccw_device->dev,
- "Protocol violation by adapter. "
- "Continuing operations.\n");
+ "A QDIO protocol error occurred, "
+ "operations continue\n");
}
/*
@@ -190,8 +191,7 @@ static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err,
* @fsf_req: pointer to struct fsf_req
* Returns: pointer to qdio_buffer_element (SBALE) structure
*/
-volatile struct qdio_buffer_element *
-zfcp_qdio_sbale_req(struct zfcp_fsf_req *req)
+struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_fsf_req *req)
{
return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, 0);
}
@@ -201,8 +201,7 @@ zfcp_qdio_sbale_req(struct zfcp_fsf_req *req)
* @fsf_req: pointer to struct fsf_req
* Returns: pointer to qdio_buffer_element (SBALE) structure
*/
-volatile struct qdio_buffer_element *
-zfcp_qdio_sbale_curr(struct zfcp_fsf_req *req)
+struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_fsf_req *req)
{
return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last,
req->sbale_curr);
@@ -216,10 +215,10 @@ static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals)
% QDIO_MAX_BUFFERS_PER_Q;
}
-static volatile struct qdio_buffer_element *
+static struct qdio_buffer_element *
zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype)
{
- volatile struct qdio_buffer_element *sbale;
+ struct qdio_buffer_element *sbale;
/* set last entry flag in current SBALE of current SBAL */
sbale = zfcp_qdio_sbale_curr(fsf_req);
@@ -250,7 +249,7 @@ zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype)
return sbale;
}
-static volatile struct qdio_buffer_element *
+static struct qdio_buffer_element *
zfcp_qdio_sbale_next(struct zfcp_fsf_req *fsf_req, unsigned long sbtype)
{
if (fsf_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL)
@@ -273,7 +272,7 @@ static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req,
unsigned int sbtype, void *start_addr,
unsigned int total_length)
{
- volatile struct qdio_buffer_element *sbale;
+ struct qdio_buffer_element *sbale;
unsigned long remaining, length;
void *addr;
@@ -282,6 +281,7 @@ static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req,
addr += length, remaining -= length) {
sbale = zfcp_qdio_sbale_next(fsf_req, sbtype);
if (!sbale) {
+ atomic_inc(&fsf_req->adapter->qdio_outb_full);
zfcp_qdio_undo_sbals(fsf_req);
return -EINVAL;
}
@@ -307,7 +307,7 @@ static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req,
int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype,
struct scatterlist *sg, int max_sbals)
{
- volatile struct qdio_buffer_element *sbale;
+ struct qdio_buffer_element *sbale;
int retval, bytes = 0;
/* figure out last allowed SBAL */
@@ -344,10 +344,10 @@ int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req)
int first = fsf_req->sbal_first;
int count = fsf_req->sbal_number;
int retval, pci, pci_batch;
- volatile struct qdio_buffer_element *sbale;
+ struct qdio_buffer_element *sbale;
/* acknowledgements for transferred buffers */
- pci_batch = req_q->pci_batch + count;
+ pci_batch = adapter->req_q_pci_batch + count;
if (unlikely(pci_batch >= ZFCP_QDIO_PCI_INTERVAL)) {
pci_batch %= ZFCP_QDIO_PCI_INTERVAL;
pci = first + count - (pci_batch + 1);
@@ -367,7 +367,7 @@ int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req)
atomic_sub(count, &req_q->count);
req_q->first += count;
req_q->first %= QDIO_MAX_BUFFERS_PER_Q;
- req_q->pci_batch = pci_batch;
+ adapter->req_q_pci_batch = pci_batch;
return 0;
}
@@ -418,14 +418,14 @@ void zfcp_qdio_close(struct zfcp_adapter *adapter)
struct zfcp_qdio_queue *req_q;
int first, count;
- if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status))
+ if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP))
return;
/* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
req_q = &adapter->req_q;
- spin_lock_bh(&req_q->lock);
+ spin_lock_bh(&adapter->req_q_lock);
atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
- spin_unlock_bh(&req_q->lock);
+ spin_unlock_bh(&adapter->req_q_lock);
qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
@@ -438,7 +438,7 @@ void zfcp_qdio_close(struct zfcp_adapter *adapter)
}
req_q->first = 0;
atomic_set(&req_q->count, 0);
- req_q->pci_batch = 0;
+ adapter->req_q_pci_batch = 0;
adapter->resp_q.first = 0;
atomic_set(&adapter->resp_q.count, 0);
}
@@ -450,23 +450,17 @@ void zfcp_qdio_close(struct zfcp_adapter *adapter)
*/
int zfcp_qdio_open(struct zfcp_adapter *adapter)
{
- volatile struct qdio_buffer_element *sbale;
+ struct qdio_buffer_element *sbale;
int cc;
- if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status))
+ if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)
return -EIO;
- if (qdio_establish(&adapter->qdio_init_data)) {
- dev_err(&adapter->ccw_device->dev,
- "Establish of QDIO queues failed.\n");
- return -EIO;
- }
+ if (qdio_establish(&adapter->qdio_init_data))
+ goto failed_establish;
- if (qdio_activate(adapter->ccw_device)) {
- dev_err(&adapter->ccw_device->dev,
- "Activate of QDIO queues failed.\n");
+ if (qdio_activate(adapter->ccw_device))
goto failed_qdio;
- }
for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) {
sbale = &(adapter->resp_q.sbal[cc]->element[0]);
@@ -476,20 +470,20 @@ int zfcp_qdio_open(struct zfcp_adapter *adapter)
}
if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0,
- QDIO_MAX_BUFFERS_PER_Q)) {
- dev_err(&adapter->ccw_device->dev,
- "Init of QDIO response queue failed.\n");
+ QDIO_MAX_BUFFERS_PER_Q))
goto failed_qdio;
- }
/* set index of first avalable SBALS / number of available SBALS */
adapter->req_q.first = 0;
atomic_set(&adapter->req_q.count, QDIO_MAX_BUFFERS_PER_Q);
- adapter->req_q.pci_batch = 0;
+ adapter->req_q_pci_batch = 0;
return 0;
failed_qdio:
qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
+failed_establish:
+ dev_err(&adapter->ccw_device->dev,
+ "Setting up the QDIO connection to the FCP adapter failed\n");
return -EIO;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 19:43:28 +0100