qedr: Add wrapping generic structure for qpidr and adjust idr routines.

Today, we are using idr mechanism for QP's only.
This patch prepares the qedr_idr stuctures and the idr routines for
both QP's and SRQ's.

Signed-off-by: Yuval Bason <yuval.bason@cavium.com>
Signed-off-by: Michal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/qedr/main.c

@@ -325,8 +325,8 @@ static int qedr_alloc_resources(struct qedr_dev *dev)
 	spin_lock_init(&dev->sgid_lock);
 
 	if (IS_IWARP(dev)) {
-		spin_lock_init(&dev->idr_lock);
-		idr_init(&dev->qpidr);
+		spin_lock_init(&dev->qpidr.idr_lock);
+		idr_init(&dev->qpidr.idr);
 		dev->iwarp_wq = create_singlethread_workqueue("qedr_iwarpq");
 	}
 

drivers/infiniband/hw/qedr/qedr.h

@@ -122,6 +122,11 @@ struct qedr_device_attr {
 
 #define QEDR_ENET_STATE_BIT	(0)
 
+struct qedr_idr {
+	spinlock_t idr_lock; /* Protect idr data-structure */
+	struct idr idr;
+};
+
 struct qedr_dev {
 	struct ib_device	ibdev;
 	struct qed_dev		*cdev;
@@ -165,8 +170,7 @@ struct qedr_dev {
 	struct qedr_cq		*gsi_rqcq;
 	struct qedr_qp		*gsi_qp;
 	enum qed_rdma_type	rdma_type;
-	spinlock_t		idr_lock; /* Protect qpidr data-structure */
-	struct idr		qpidr;
+	struct qedr_idr		qpidr;
 	struct workqueue_struct *iwarp_wq;
 	u16			iwarp_max_mtu;
 

drivers/infiniband/hw/qedr/qedr_iw_cm.c

@@ -491,7 +491,7 @@ int qedr_iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
 	int rc = 0;
 	int i;
 
-	qp = idr_find(&dev->qpidr, conn_param->qpn);
+	qp = idr_find(&dev->qpidr.idr, conn_param->qpn);
 
 	laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
 	raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
@@ -679,7 +679,7 @@ int qedr_iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
 
 	DP_DEBUG(dev, QEDR_MSG_IWARP, "Accept on qpid=%d\n", conn_param->qpn);
 
-	qp = idr_find(&dev->qpidr, conn_param->qpn);
+	qp = idr_find(&dev->qpidr.idr, conn_param->qpn);
 	if (!qp) {
 		DP_ERR(dev, "Invalid QP number %d\n", conn_param->qpn);
 		return -EINVAL;
@@ -737,9 +737,9 @@ void qedr_iw_qp_rem_ref(struct ib_qp *ibqp)
 	struct qedr_qp *qp = get_qedr_qp(ibqp);
 
 	if (atomic_dec_and_test(&qp->refcnt)) {
-		spin_lock_irq(&qp->dev->idr_lock);
-		idr_remove(&qp->dev->qpidr, qp->qp_id);
-		spin_unlock_irq(&qp->dev->idr_lock);
+		spin_lock_irq(&qp->dev->qpidr.idr_lock);
+		idr_remove(&qp->dev->qpidr.idr, qp->qp_id);
+		spin_unlock_irq(&qp->dev->qpidr.idr_lock);
 		kfree(qp);
 	}
 }
@@ -748,5 +748,5 @@ struct ib_qp *qedr_iw_get_qp(struct ib_device *ibdev, int qpn)
 {
 	struct qedr_dev *dev = get_qedr_dev(ibdev);
 
-	return idr_find(&dev->qpidr, qpn);
+	return idr_find(&dev->qpidr.idr, qpn);
 }

drivers/infiniband/hw/qedr/verbs.c

@@ -1311,32 +1311,27 @@ static inline void qedr_qp_user_print(struct qedr_dev *dev, struct qedr_qp *qp)
 		 qp->usq.buf_len, qp->urq.buf_addr, qp->urq.buf_len);
 }
 
-static int qedr_idr_add(struct qedr_dev *dev, void *ptr, u32 id)
+static int qedr_idr_add(struct qedr_dev *dev, struct qedr_idr *qidr,
+			void *ptr, u32 id)
 {
 	int rc;
 
-	if (!rdma_protocol_iwarp(&dev->ibdev, 1))
-		return 0;
-
 	idr_preload(GFP_KERNEL);
-	spin_lock_irq(&dev->idr_lock);
+	spin_lock_irq(&qidr->idr_lock);
 
-	rc = idr_alloc(&dev->qpidr, ptr, id, id + 1, GFP_ATOMIC);
+	rc = idr_alloc(&qidr->idr, ptr, id, id + 1, GFP_ATOMIC);
 
-	spin_unlock_irq(&dev->idr_lock);
+	spin_unlock_irq(&qidr->idr_lock);
 	idr_preload_end();
 
 	return rc < 0 ? rc : 0;
 }
 
-static void qedr_idr_remove(struct qedr_dev *dev, u32 id)
+static void qedr_idr_remove(struct qedr_dev *dev, struct qedr_idr *qidr, u32 id)
 {
-	if (!rdma_protocol_iwarp(&dev->ibdev, 1))
-		return;
-
-	spin_lock_irq(&dev->idr_lock);
-	idr_remove(&dev->qpidr, id);
-	spin_unlock_irq(&dev->idr_lock);
+	spin_lock_irq(&qidr->idr_lock);
+	idr_remove(&qidr->idr, id);
+	spin_unlock_irq(&qidr->idr_lock);
 }
 
 static inline void
@@ -1708,9 +1703,11 @@ struct ib_qp *qedr_create_qp(struct ib_pd *ibpd,
 
 	qp->ibqp.qp_num = qp->qp_id;
 
-	rc = qedr_idr_add(dev, qp, qp->qp_id);
-	if (rc)
-		goto err;
+	if (rdma_protocol_iwarp(&dev->ibdev, 1)) {
+		rc = qedr_idr_add(dev, &dev->qpidr, qp, qp->qp_id);
+		if (rc)
+			goto err;
+	}
 
 	return &qp->ibqp;
 
@@ -2279,8 +2276,9 @@ int qedr_destroy_qp(struct ib_qp *ibqp)
 
 	qedr_free_qp_resources(dev, qp);
 
-	if (atomic_dec_and_test(&qp->refcnt)) {
-		qedr_idr_remove(dev, qp->qp_id);
+	if (atomic_dec_and_test(&qp->refcnt) &&
+	    rdma_protocol_iwarp(&dev->ibdev, 1)) {
+		qedr_idr_remove(dev, &dev->qpidr, qp->qp_id);
 		kfree(qp);
 	}
 	return rc;