[PATCH v2 4/6] qla2xxx: Simpify unregistration of FC-NVMe local/remote ports

Himanshu Madhani
2017-07-21T16:32:40Z

Simplified waiting for unregister local/remote FC-NVMe ports
to complete cleanup.

Signed-off-by: Duane Grigsby <duane.grigsby@cavium.com>
Signed-off-by: Darren Trapp <darren.trapp@cavium.com>
Signed-off-by: Anil Gurumurthy <anil.gurumurthy@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
---
drivers/scsi/qla2xxx/qla_def.h | 6 ++---
drivers/scsi/qla2xxx/qla_nvme.c | 59 +++++++----------------------------------
2 files changed, 12 insertions(+), 53 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 5ceb50161d89..b3e3982a9db0 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2302,8 +2302,7 @@ typedef struct fc_port {
unsigned int login_succ:1;

struct work_struct nvme_del_work;
- atomic_t nvme_ref_count;
- wait_queue_head_t nvme_waitq;
+ struct completion nvme_del_done;
uint32_t nvme_prli_service_param;
#define NVME_PRLI_SP_CONF BIT_7
#define NVME_PRLI_SP_INITIATOR BIT_5
@@ -4134,8 +4133,7 @@ typedef struct scsi_qla_host {
uint8_t fabric_node_name[WWN_SIZE];

struct nvme_fc_local_port *nvme_local_port;
- atomic_t nvme_ref_count;
- wait_queue_head_t nvme_waitq;
+ struct completion nvme_del_done;
struct list_head nvme_rport_list;
atomic_t nvme_active_aen_cnt;
uint16_t nvme_last_rptd_aen;
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index eecbe8bc4890..6c5eebbbda4c 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -75,8 +75,6 @@ int qla_nvme_register_remote(struct scsi_qla_host *vha, struct fc_port *fcport)

fcport->nvme_remote_port->private = fcport;
fcport->nvme_flag |= NVME_FLAG_REGISTERED;
- atomic_set(&fcport->nvme_ref_count, 1);
- init_waitqueue_head(&fcport->nvme_waitq);
rport->fcport = fcport;
list_add_tail(&rport->list, &vha->nvme_rport_list);
return 0;
@@ -233,7 +231,6 @@ static int qla_nvme_ls_req(struct nvme_fc_local_port *lport,
sp->name = "nvme_ls";
sp->done = qla_nvme_sp_ls_done;
atomic_set(&sp->ref_count, 1);
- init_waitqueue_head(&sp->nvme_ls_waitq);
nvme = &sp->u.iocb_cmd;
priv->sp = sp;
priv->fd = fd;
@@ -540,12 +537,10 @@ static void qla_nvme_localport_delete(struct nvme_fc_local_port *lport)
{
struct scsi_qla_host *vha = lport->private;

- atomic_dec(&vha->nvme_ref_count);
- wake_up_all(&vha->nvme_waitq);
-
ql_log(ql_log_info, vha, 0x210f,
"localport delete of %p completed.\n", vha->nvme_local_port);
vha->nvme_local_port = NULL;
+ complete(&vha->nvme_del_done);
}

static void qla_nvme_remoteport_delete(struct nvme_fc_remote_port *rport)
@@ -556,8 +551,6 @@ static void qla_nvme_remoteport_delete(struct nvme_fc_remote_port *rport)
fcport = rport->private;
fcport->nvme_remote_port = NULL;
fcport->nvme_flag &= ~NVME_FLAG_REGISTERED;
- atomic_dec(&fcport->nvme_ref_count);
- wake_up_all(&fcport->nvme_waitq);

list_for_each_entry_safe(r_port, trport,
&fcport->vha->nvme_rport_list, list) {
@@ -567,6 +560,7 @@ static void qla_nvme_remoteport_delete(struct nvme_fc_remote_port *rport)
}
}
kfree(r_port);
+ complete(&fcport->nvme_del_done);

ql_log(ql_log_info, fcport->vha, 0x2110,
"remoteport_delete of %p completed.\n", fcport);
@@ -609,12 +603,11 @@ static int qla_nvme_wait_on_command(srb_t *sp)
static int qla_nvme_wait_on_rport_del(fc_port_t *fcport)
{
int ret = QLA_SUCCESS;
+ int timeout;

- wait_event_timeout(fcport->nvme_waitq,
- atomic_read(&fcport->nvme_ref_count),
- NVME_ABORT_POLLING_PERIOD*HZ);
-
- if (atomic_read(&fcport->nvme_ref_count)) {
+ timeout = wait_for_completion_timeout(&fcport->nvme_del_done,
+ msecs_to_jiffies(2000));
+ if (!timeout) {
ret = QLA_FUNCTION_FAILED;
ql_log(ql_log_info, fcport->vha, 0x2111,
"timed out waiting for fcport=%p to delete\n", fcport);
@@ -633,39 +626,6 @@ void qla_nvme_abort(struct qla_hw_data *ha, struct srb *sp)
"nvme_wait_on_comand timed out waiting on sp=%p\n", sp);
}

-static void qla_nvme_abort_all(fc_port_t *fcport)
-{
- int que, cnt;
- unsigned long flags;
- srb_t *sp;
- struct qla_hw_data *ha = fcport->vha->hw;
- struct req_que *req;
-
- spin_lock_irqsave(&ha->hardware_lock, flags);
- for (que = 0; que < ha->max_req_queues; que++) {
- req = ha->req_q_map[que];
- if (!req)
- continue;
- if (!req->outstanding_cmds)
- continue;
- for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
- sp = req->outstanding_cmds[cnt];
- if ((sp) && ((sp->type == SRB_NVME_CMD) ||
- (sp->type == SRB_NVME_LS)) &&
- (sp->fcport == fcport)) {
- atomic_inc(&sp->ref_count);
- spin_unlock_irqrestore(&ha->hardware_lock,
- flags);
- qla_nvme_abort(ha, sp);
- spin_lock_irqsave(&ha->hardware_lock, flags);
- req->outstanding_cmds[cnt] = NULL;
- sp->done(sp, 1);
- }
- }
- }
- spin_unlock_irqrestore(&ha->hardware_lock, flags);
-}
-
static void qla_nvme_unregister_remote_port(struct work_struct *work)
{
struct fc_port *fcport = container_of(work, struct fc_port,
@@ -701,12 +661,13 @@ void qla_nvme_delete(struct scsi_qla_host *vha)
ql_log(ql_log_info, fcport->vha, 0x2114, "%s: fcport=%p\n",
__func__, fcport);

+ init_completion(&fcport->nvme_del_done);
nvme_fc_unregister_remoteport(fcport->nvme_remote_port);
qla_nvme_wait_on_rport_del(fcport);
- qla_nvme_abort_all(fcport);
}

if (vha->nvme_local_port) {
+ init_completion(&vha->nvme_del_done);
nv_ret = nvme_fc_unregister_localport(vha->nvme_local_port);
if (nv_ret == 0)
ql_log(ql_log_info, vha, 0x2116,
@@ -715,6 +676,8 @@ void qla_nvme_delete(struct scsi_qla_host *vha)
else
ql_log(ql_log_info, vha, 0x2115,
"Unregister of localport failed\n");
+ wait_for_completion_timeout(&vha->nvme_del_done,
+ msecs_to_jiffies(5000));
}
}

@@ -755,7 +718,5 @@ void qla_nvme_register_hba(struct scsi_qla_host *vha)
"register_localport failed: ret=%x\n", ret);
return;
}
- atomic_set(&vha->nvme_ref_count, 1);
vha->nvme_local_port->private = vha;
- init_waitqueue_head(&vha->nvme_waitq);
}
--
2.12.0