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path: root/drivers/s390/scsi/zfcp_fsf.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.c')
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c100
1 files changed, 61 insertions, 39 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index d024442ee12..e6416f8541b 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -6,6 +6,9 @@
* Copyright IBM Corporation 2002, 2008
*/
+#define KMSG_COMPONENT "zfcp"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/blktrace_api.h>
#include "zfcp_ext.h"
@@ -641,38 +644,38 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
}
}
-static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
+static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
{
- struct zfcp_qdio_queue *req_q = &adapter->req_q;
-
- spin_lock_bh(&adapter->req_q_lock);
- if (atomic_read(&req_q->count))
+ if (atomic_read(&adapter->req_q.count) > 0)
return 1;
- spin_unlock_bh(&adapter->req_q_lock);
+ atomic_inc(&adapter->qdio_outb_full);
return 0;
}
-static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
-{
- unsigned int count = atomic_read(&adapter->req_q.count);
- if (!count)
- atomic_inc(&adapter->qdio_outb_full);
- return count > 0;
-}
-
static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
+ __releases(&adapter->req_q_lock)
+ __acquires(&adapter->req_q_lock)
{
+ struct zfcp_qdio_queue *req_q = &adapter->req_q;
long ret;
+ if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
+ return -EIO;
+ if (atomic_read(&req_q->count) > 0)
+ return 0;
+
+ atomic_dec(&req_q->count);
spin_unlock_bh(&adapter->req_q_lock);
ret = wait_event_interruptible_timeout(adapter->request_wq,
- zfcp_fsf_sbal_check(adapter), 5 * HZ);
+ atomic_read(&req_q->count) >= 0,
+ 5 * HZ);
+ spin_lock_bh(&adapter->req_q_lock);
+ atomic_inc(&req_q->count);
+
if (ret > 0)
return 0;
if (!ret)
atomic_inc(&adapter->qdio_outb_full);
-
- spin_lock_bh(&adapter->req_q_lock);
return -EIO;
}
@@ -930,8 +933,10 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
req_flags, adapter->pool.fsf_req_abort);
- if (IS_ERR(req))
+ if (IS_ERR(req)) {
+ req = NULL;
goto out;
+ }
if (unlikely(!(atomic_read(&unit->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
@@ -1008,12 +1013,29 @@ skip_fsfstatus:
send_ct->handler(send_ct->handler_data);
}
-static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
- struct scatterlist *sg_req,
- struct scatterlist *sg_resp, int max_sbals)
+static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
+ struct scatterlist *sg_req,
+ struct scatterlist *sg_resp,
+ int max_sbals)
{
+ struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
+ u32 feat = req->adapter->adapter_features;
int bytes;
+ if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
+ if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
+ !sg_is_last(sg_req) || !sg_is_last(sg_resp))
+ return -EOPNOTSUPP;
+
+ sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
+ sbale[2].addr = sg_virt(sg_req);
+ sbale[2].length = sg_req->length;
+ sbale[3].addr = sg_virt(sg_resp);
+ sbale[3].length = sg_resp->length;
+ sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
+ return 0;
+ }
+
bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
sg_req, max_sbals);
if (bytes <= 0)
@@ -1055,8 +1077,8 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
goto out;
}
- ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
- FSF_MAX_SBALS_PER_REQ);
+ ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
+ FSF_MAX_SBALS_PER_REQ);
if (ret)
goto failed_send;
@@ -1166,7 +1188,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els)
goto out;
}
- ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
+ ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
if (ret)
goto failed_send;
@@ -1401,13 +1423,7 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
switch (header->fsf_status_qual.word[0]) {
case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
- req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- break;
case FSF_SQ_NO_RETRY_POSSIBLE:
- dev_warn(&req->adapter->ccw_device->dev,
- "Remote port 0x%016Lx could not be opened\n",
- (unsigned long long)port->wwpn);
- zfcp_erp_port_failed(port, 32, req);
req->status |= ZFCP_STATUS_FSFREQ_ERROR;
break;
}
@@ -1435,10 +1451,10 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
* Alternately, an ADISC/PDISC ELS should suffice, as well.
*/
plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
- if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
+ if (req->qtcb->bottom.support.els1_length >=
+ FSF_PLOGI_MIN_LEN) {
if (plogi->serv_param.wwpn != port->wwpn)
- atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
- &port->status);
+ port->d_id = 0;
else {
port->wwnn = plogi->serv_param.wwnn;
zfcp_fc_plogi_evaluate(port, plogi);
@@ -1584,6 +1600,7 @@ static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
break;
case FSF_PORT_ALREADY_OPEN:
+ break;
case FSF_GOOD:
wka_port->handle = header->port_handle;
wka_port->status = ZFCP_WKA_PORT_ONLINE;
@@ -1901,7 +1918,7 @@ static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
dev_err(&adapter->ccw_device->dev,
"Shared read-write access not "
"supported (unit 0x%016Lx, port "
- "0x%016Lx\n)",
+ "0x%016Lx)\n",
(unsigned long long)unit->fcp_lun,
(unsigned long long)unit->port->wwpn);
zfcp_erp_unit_failed(unit, 36, req);
@@ -2113,18 +2130,21 @@ static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
{
- struct scsi_cmnd *scpnt = req->data;
+ struct scsi_cmnd *scpnt;
struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
&(req->qtcb->bottom.io.fcp_rsp);
u32 sns_len;
char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
unsigned long flags;
- if (unlikely(!scpnt))
- return;
-
read_lock_irqsave(&req->adapter->abort_lock, flags);
+ scpnt = req->data;
+ if (unlikely(!scpnt)) {
+ read_unlock_irqrestore(&req->adapter->abort_lock, flags);
+ return;
+ }
+
if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
set_host_byte(scpnt, DID_SOFT_ERROR);
set_driver_byte(scpnt, SUGGEST_RETRY);
@@ -2442,8 +2462,10 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
adapter->pool.fsf_req_scsi);
- if (IS_ERR(req))
+ if (IS_ERR(req)) {
+ req = NULL;
goto out;
+ }
req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
req->data = unit;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-09-24 18:32:22 +0000