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IB/qib: Remove destroy queue pair code 

Destroy QP functionality in rdmavt will be used instead.
Remove the remove_qp function being called exclusively by destroy qp code.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Harish Chegondi 2016-02-03 14:20:35 -08:00 committed by Doug Ledford
parent 70696ea75b
commit 8e4c066634
3 changed files with 0 additions and 108 deletions
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105
drivers/infiniband/hw/qib/qib_qp.c
View File

@ -209,58 +209,6 @@ bail:
return ret;
}
static inline unsigned qpn_hash(struct qib_ibdev *dev, u32 qpn)
{
return hash_32(qpn, dev->rdi.qp_dev->qp_table_bits);
}
/*
* Remove the QP from the table so it can't be found asynchronously by
* the receive interrupt routine.
*/
static void remove_qp(struct qib_ibdev *dev, struct rvt_qp *qp)
{
struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
unsigned n = qpn_hash(dev, qp->ibqp.qp_num);
unsigned long flags;
int removed = 1;
spinlock_t *qpt_lock_ptr; /* Pointer to make checkpatch happy */
spin_lock_irqsave(&dev->rdi.qp_dev->qpt_lock, flags);
qpt_lock_ptr = &dev->rdi.qp_dev->qpt_lock;
if (rcu_dereference_protected(ibp->rvp.qp[0],
lockdep_is_held(qpt_lock_ptr)) == qp) {
RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
} else if (rcu_dereference_protected(ibp->rvp.qp[1],
lockdep_is_held(&dev->rdi.qp_dev->qpt_lock)) == qp) {
RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
} else {
struct rvt_qp *q;
struct rvt_qp __rcu **qpp;
removed = 0;
qpp = &dev->rdi.qp_dev->qp_table[n];
for (; (q = rcu_dereference_protected(*qpp,
lockdep_is_held(qpt_lock_ptr))) != NULL;
qpp = &q->next)
if (q == qp) {
RCU_INIT_POINTER(*qpp,
rcu_dereference_protected(qp->next,
lockdep_is_held(qpt_lock_ptr)));
removed = 1;
break;
}
}
spin_unlock_irqrestore(&dev->rdi.qp_dev->qpt_lock, flags);
if (removed) {
synchronize_rcu();
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
}
}
/**
* qib_free_all_qps - check for QPs still in use
*/
@ -488,59 +436,6 @@ void flush_qp_waiters(struct rvt_qp *qp)
spin_unlock(&dev->rdi.pending_lock);
}
/**
* qib_destroy_qp - destroy a queue pair
* @ibqp: the queue pair to destroy
*
* Returns 0 on success.
*
* Note that this can be called while the QP is actively sending or
* receiving!
*/
int qib_destroy_qp(struct ib_qp *ibqp)
{
struct rvt_qp *qp = ibqp_to_rvtqp(ibqp);
struct qib_ibdev *dev = to_idev(ibqp->device);
struct qib_qp_priv *priv = qp->priv;
/* Make sure HW and driver activity is stopped. */
spin_lock_irq(&qp->s_lock);
if (qp->state != IB_QPS_RESET) {
qp->state = IB_QPS_RESET;
spin_lock(&dev->rdi.pending_lock);
if (!list_empty(&priv->iowait))
list_del_init(&priv->iowait);
spin_unlock(&dev->rdi.pending_lock);
qp->s_flags &= ~(RVT_S_TIMER | RVT_S_ANY_WAIT);
spin_unlock_irq(&qp->s_lock);
cancel_work_sync(&priv->s_work);
del_timer_sync(&qp->s_timer);
wait_event(priv->wait_dma, !atomic_read(&priv->s_dma_busy));
if (priv->s_tx) {
qib_put_txreq(priv->s_tx);
priv->s_tx = NULL;
}
remove_qp(dev, qp);
wait_event(qp->wait, !atomic_read(&qp->refcount));
rvt_clear_mr_refs(qp, 1);
} else
spin_unlock_irq(&qp->s_lock);
/* all user's cleaned up, mark it available */
rvt_free_qpn(&dev->rdi.qp_dev->qpn_table, qp->ibqp.qp_num);
rvt_dec_qp_cnt(&dev->rdi);
if (qp->ip)
kref_put(&qp->ip->ref, rvt_release_mmap_info);
else
vfree(qp->r_rq.wq);
vfree(qp->s_wq);
kfree(priv->s_hdr);
kfree(priv);
kfree(qp);
return 0;
}
/**
* qib_get_credit - flush the send work queue of a QP
* @qp: the qp who's send work queue to flush

1
drivers/infiniband/hw/qib/qib_verbs.c
View File

@ -1697,7 +1697,6 @@ int qib_register_ib_device(struct qib_devdata *dd)
ibdev->query_port = qib_query_port;
ibdev->modify_port = qib_modify_port;
ibdev->query_gid = qib_query_gid;
ibdev->destroy_qp = qib_destroy_qp;
ibdev->process_mad = qib_process_mad;
ibdev->get_port_immutable = qib_port_immutable;

2
drivers/infiniband/hw/qib/qib_verbs.h
View File

@ -346,8 +346,6 @@ int qib_get_counters(struct qib_pportdata *ppd,
__be32 qib_compute_aeth(struct rvt_qp *qp);
int qib_destroy_qp(struct ib_qp *ibqp);
/*
* Functions provided by qib driver for rdmavt to use
*/