From ab8403c424a35364a3a2c753f7c5917fcbb4d809 Mon Sep 17 00:00:00 2001
From: Roland Dreier <rolandd@cisco.com>
Date: Sun, 14 Oct 2007 20:40:27 -0700
Subject: IB/mthca: Avoid alignment traps when writing doorbells

Architectures such as ia64 see alignment traps when doing a 64-bit
read from __be32 doorbell[2] arrays to do doorbell writes in
mthca_write64().  Fix this by just passing the two halves of the
doorbell value into mthca_write64().  This actually improves the
generated code by allowing the compiler to see what's going on better.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/mthca/mthca_cq.c       | 53 ++++++++++------------------
 drivers/infiniband/hw/mthca/mthca_doorbell.h | 13 ++++---
 drivers/infiniband/hw/mthca/mthca_eq.c       | 21 ++---------
 drivers/infiniband/hw/mthca/mthca_qp.c       | 45 ++++++++---------------
 drivers/infiniband/hw/mthca/mthca_srq.c      | 11 ++----
 5 files changed, 47 insertions(+), 96 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c
index be6e1e03bdab..6bd9f1393349 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -204,16 +204,11 @@ static void dump_cqe(struct mthca_dev *dev, void *cqe_ptr)
 static inline void update_cons_index(struct mthca_dev *dev, struct mthca_cq *cq,
 				     int incr)
 {
-	__be32 doorbell[2];
-
 	if (mthca_is_memfree(dev)) {
 		*cq->set_ci_db = cpu_to_be32(cq->cons_index);
 		wmb();
 	} else {
-		doorbell[0] = cpu_to_be32(MTHCA_TAVOR_CQ_DB_INC_CI | cq->cqn);
-		doorbell[1] = cpu_to_be32(incr - 1);
-
-		mthca_write64(doorbell,
+		mthca_write64(MTHCA_TAVOR_CQ_DB_INC_CI | cq->cqn, incr - 1,
 			      dev->kar + MTHCA_CQ_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 		/*
@@ -731,17 +726,12 @@ repoll:
 
 int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags)
 {
-	__be32 doorbell[2];
+	u32 dbhi = ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
+		    MTHCA_TAVOR_CQ_DB_REQ_NOT_SOL :
+		    MTHCA_TAVOR_CQ_DB_REQ_NOT) |
+		to_mcq(cq)->cqn;
 
-	doorbell[0] = cpu_to_be32(((flags & IB_CQ_SOLICITED_MASK) ==
-				   IB_CQ_SOLICITED ?
-				   MTHCA_TAVOR_CQ_DB_REQ_NOT_SOL :
-				   MTHCA_TAVOR_CQ_DB_REQ_NOT)      |
-				  to_mcq(cq)->cqn);
-	doorbell[1] = (__force __be32) 0xffffffff;
-
-	mthca_write64(doorbell,
-		      to_mdev(cq->device)->kar + MTHCA_CQ_DOORBELL,
+	mthca_write64(dbhi, 0xffffffff, to_mdev(cq->device)->kar + MTHCA_CQ_DOORBELL,
 		      MTHCA_GET_DOORBELL_LOCK(&to_mdev(cq->device)->doorbell_lock));
 
 	return 0;
@@ -750,19 +740,16 @@ int mthca_tavor_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags)
 int mthca_arbel_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
 {
 	struct mthca_cq *cq = to_mcq(ibcq);
-	__be32 doorbell[2];
-	u32 sn;
-	__be32 ci;
-
-	sn = cq->arm_sn & 3;
-	ci = cpu_to_be32(cq->cons_index);
+	__be32 db_rec[2];
+	u32 dbhi;
+	u32 sn = cq->arm_sn & 3;
 
-	doorbell[0] = ci;
-	doorbell[1] = cpu_to_be32((cq->cqn << 8) | (2 << 5) | (sn << 3) |
-				  ((flags & IB_CQ_SOLICITED_MASK) ==
-				   IB_CQ_SOLICITED ? 1 : 2));
+	db_rec[0] = cpu_to_be32(cq->cons_index);
+	db_rec[1] = cpu_to_be32((cq->cqn << 8) | (2 << 5) | (sn << 3) |
+				((flags & IB_CQ_SOLICITED_MASK) ==
+				 IB_CQ_SOLICITED ? 1 : 2));
 
-	mthca_write_db_rec(doorbell, cq->arm_db);
+	mthca_write_db_rec(db_rec, cq->arm_db);
 
 	/*
 	 * Make sure that the doorbell record in host memory is
@@ -770,14 +757,12 @@ int mthca_arbel_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
 	 */
 	wmb();
 
-	doorbell[0] = cpu_to_be32((sn << 28)                       |
-				  ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
-				   MTHCA_ARBEL_CQ_DB_REQ_NOT_SOL :
-				   MTHCA_ARBEL_CQ_DB_REQ_NOT)      |
-				  cq->cqn);
-	doorbell[1] = ci;
+	dbhi = (sn << 28) |
+		((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
+		 MTHCA_ARBEL_CQ_DB_REQ_NOT_SOL :
+		 MTHCA_ARBEL_CQ_DB_REQ_NOT) | cq->cqn;
 
-	mthca_write64(doorbell,
+	mthca_write64(dbhi, cq->cons_index,
 		      to_mdev(ibcq->device)->kar + MTHCA_CQ_DOORBELL,
 		      MTHCA_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->doorbell_lock));
 
diff --git a/drivers/infiniband/hw/mthca/mthca_doorbell.h b/drivers/infiniband/hw/mthca/mthca_doorbell.h
index dd9a44d170c9..b374dc395be1 100644
--- a/drivers/infiniband/hw/mthca/mthca_doorbell.h
+++ b/drivers/infiniband/hw/mthca/mthca_doorbell.h
@@ -58,10 +58,10 @@ static inline void mthca_write64_raw(__be64 val, void __iomem *dest)
 	__raw_writeq((__force u64) val, dest);
 }
 
-static inline void mthca_write64(__be32 val[2], void __iomem *dest,
+static inline void mthca_write64(u32 hi, u32 lo, void __iomem *dest,
 				 spinlock_t *doorbell_lock)
 {
-	__raw_writeq(*(u64 *) val, dest);
+	__raw_writeq((__force u64) cpu_to_be64((u64) hi << 32 | lo), dest);
 }
 
 static inline void mthca_write_db_rec(__be32 val[2], __be32 *db)
@@ -87,14 +87,17 @@ static inline void mthca_write64_raw(__be64 val, void __iomem *dest)
 	__raw_writel(((__force u32 *) &val)[1], dest + 4);
 }
 
-static inline void mthca_write64(__be32 val[2], void __iomem *dest,
+static inline void mthca_write64(u32 hi, u32 lo, void __iomem *dest,
 				 spinlock_t *doorbell_lock)
 {
 	unsigned long flags;
 
+	hi = (__force u32) cpu_to_be32(hi);
+	lo = (__force u32) cpu_to_be32(lo);
+
 	spin_lock_irqsave(doorbell_lock, flags);
-	__raw_writel((__force u32) val[0], dest);
-	__raw_writel((__force u32) val[1], dest + 4);
+	__raw_writel(hi, dest);
+	__raw_writel(lo, dest + 4);
 	spin_unlock_irqrestore(doorbell_lock, flags);
 }
 
diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c
index 8592b26dc4e1..b29de51b7f35 100644
--- a/drivers/infiniband/hw/mthca/mthca_eq.c
+++ b/drivers/infiniband/hw/mthca/mthca_eq.c
@@ -173,11 +173,6 @@ static inline u64 async_mask(struct mthca_dev *dev)
 
 static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
 {
-	__be32 doorbell[2];
-
-	doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_SET_CI | eq->eqn);
-	doorbell[1] = cpu_to_be32(ci & (eq->nent - 1));
-
 	/*
 	 * This barrier makes sure that all updates to ownership bits
 	 * done by set_eqe_hw() hit memory before the consumer index
@@ -187,7 +182,7 @@ static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u
 	 * having set_eqe_hw() overwrite the owner field.
 	 */
 	wmb();
-	mthca_write64(doorbell,
+	mthca_write64(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1),
 		      dev->kar + MTHCA_EQ_DOORBELL,
 		      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 }
@@ -212,12 +207,7 @@ static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
 
 static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn)
 {
-	__be32 doorbell[2];
-
-	doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_REQ_NOT | eqn);
-	doorbell[1] = 0;
-
-	mthca_write64(doorbell,
+	mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0,
 		      dev->kar + MTHCA_EQ_DOORBELL,
 		      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 }
@@ -230,12 +220,7 @@ static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask)
 static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn)
 {
 	if (!mthca_is_memfree(dev)) {
-		__be32 doorbell[2];
-
-		doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_DISARM_CQ | eqn);
-		doorbell[1] = cpu_to_be32(cqn);
-
-		mthca_write64(doorbell,
+		mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn,
 			      dev->kar + MTHCA_EQ_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 	}
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index df01b2026a64..0e5461c65731 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -1799,15 +1799,11 @@ int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 
 out:
 	if (likely(nreq)) {
-		__be32 doorbell[2];
-
-		doorbell[0] = cpu_to_be32(((qp->sq.next_ind << qp->sq.wqe_shift) +
-					   qp->send_wqe_offset) | f0 | op0);
-		doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
-
 		wmb();
 
-		mthca_write64(doorbell,
+		mthca_write64(((qp->sq.next_ind << qp->sq.wqe_shift) +
+			       qp->send_wqe_offset) | f0 | op0,
+			      (qp->qpn << 8) | size0,
 			      dev->kar + MTHCA_SEND_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 		/*
@@ -1829,7 +1825,6 @@ int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 {
 	struct mthca_dev *dev = to_mdev(ibqp->device);
 	struct mthca_qp *qp = to_mqp(ibqp);
-	__be32 doorbell[2];
 	unsigned long flags;
 	int err = 0;
 	int nreq;
@@ -1907,13 +1902,10 @@ int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 		if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) {
 			nreq = 0;
 
-			doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0);
-			doorbell[1] = cpu_to_be32(qp->qpn << 8);
-
 			wmb();
 
-			mthca_write64(doorbell,
-				      dev->kar + MTHCA_RECEIVE_DOORBELL,
+			mthca_write64((qp->rq.next_ind << qp->rq.wqe_shift) | size0,
+				      qp->qpn << 8, dev->kar + MTHCA_RECEIVE_DOORBELL,
 				      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 
 			qp->rq.next_ind = ind;
@@ -1923,13 +1915,10 @@ int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 
 out:
 	if (likely(nreq)) {
-		doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0);
-		doorbell[1] = cpu_to_be32((qp->qpn << 8) | nreq);
-
 		wmb();
 
-		mthca_write64(doorbell,
-			      dev->kar + MTHCA_RECEIVE_DOORBELL,
+		mthca_write64((qp->rq.next_ind << qp->rq.wqe_shift) | size0,
+			      qp->qpn << 8 | nreq, dev->kar + MTHCA_RECEIVE_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 	}
 
@@ -1951,7 +1940,7 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 {
 	struct mthca_dev *dev = to_mdev(ibqp->device);
 	struct mthca_qp *qp = to_mqp(ibqp);
-	__be32 doorbell[2];
+	u32 dbhi;
 	void *wqe;
 	void *prev_wqe;
 	unsigned long flags;
@@ -1981,10 +1970,8 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 		if (unlikely(nreq == MTHCA_ARBEL_MAX_WQES_PER_SEND_DB)) {
 			nreq = 0;
 
-			doorbell[0] = cpu_to_be32((MTHCA_ARBEL_MAX_WQES_PER_SEND_DB << 24) |
-						  ((qp->sq.head & 0xffff) << 8) |
-						  f0 | op0);
-			doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
+			dbhi = (MTHCA_ARBEL_MAX_WQES_PER_SEND_DB << 24) |
+				((qp->sq.head & 0xffff) << 8) | f0 | op0;
 
 			qp->sq.head += MTHCA_ARBEL_MAX_WQES_PER_SEND_DB;
 
@@ -2000,7 +1987,8 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 			 * write MMIO send doorbell.
 			 */
 			wmb();
-			mthca_write64(doorbell,
+
+			mthca_write64(dbhi, (qp->qpn << 8) | size0,
 				      dev->kar + MTHCA_SEND_DOORBELL,
 				      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 		}
@@ -2154,10 +2142,7 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 
 out:
 	if (likely(nreq)) {
-		doorbell[0] = cpu_to_be32((nreq << 24)                  |
-					  ((qp->sq.head & 0xffff) << 8) |
-					  f0 | op0);
-		doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
+		dbhi = (nreq << 24) | ((qp->sq.head & 0xffff) << 8) | f0 | op0;
 
 		qp->sq.head += nreq;
 
@@ -2173,8 +2158,8 @@ out:
 		 * write MMIO send doorbell.
 		 */
 		wmb();
-		mthca_write64(doorbell,
-			      dev->kar + MTHCA_SEND_DOORBELL,
+
+		mthca_write64(dbhi, (qp->qpn << 8) | size0, dev->kar + MTHCA_SEND_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 	}
 
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index 3f58c11a62b7..553d681f6813 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -491,7 +491,6 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 {
 	struct mthca_dev *dev = to_mdev(ibsrq->device);
 	struct mthca_srq *srq = to_msrq(ibsrq);
-	__be32 doorbell[2];
 	unsigned long flags;
 	int err = 0;
 	int first_ind;
@@ -563,16 +562,13 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 		if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) {
 			nreq = 0;
 
-			doorbell[0] = cpu_to_be32(first_ind << srq->wqe_shift);
-			doorbell[1] = cpu_to_be32(srq->srqn << 8);
-
 			/*
 			 * Make sure that descriptors are written
 			 * before doorbell is rung.
 			 */
 			wmb();
 
-			mthca_write64(doorbell,
+			mthca_write64(first_ind << srq->wqe_shift, srq->srqn << 8,
 				      dev->kar + MTHCA_RECEIVE_DOORBELL,
 				      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 
@@ -581,16 +577,13 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 	}
 
 	if (likely(nreq)) {
-		doorbell[0] = cpu_to_be32(first_ind << srq->wqe_shift);
-		doorbell[1] = cpu_to_be32((srq->srqn << 8) | nreq);
-
 		/*
 		 * Make sure that descriptors are written before
 		 * doorbell is rung.
 		 */
 		wmb();
 
-		mthca_write64(doorbell,
+		mthca_write64(first_ind << srq->wqe_shift, (srq->srqn << 8) | nreq,
 			      dev->kar + MTHCA_RECEIVE_DOORBELL,
 			      MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
 	}
-- 
cgit v1.2.3-58-ga151


From c5483388bb4d771007ef36478db038e07922a020 Mon Sep 17 00:00:00 2001
From: Sean Hefty <sean.hefty@intel.com>
Date: Mon, 24 Sep 2007 13:19:09 -0700
Subject: RDMA/cma: Add locking around QP accesses

If a user allocates a QP on an rdma_cm_id, the rdma_cm will automatically
transition the QP through its states (RTR, RTS, error, etc.)  While the
QP state transitions are occurring, the QP itself must remain valid.
Provide locking around the QP pointer to prevent its destruction while
accessing the pointer.

This fixes an issue reported by Olaf Kirch from Oracle that resulted in
a system crash:

"An incoming connection arrives and we decide to tear down the nascent
 connection.  The remote ends decides to do the same.  We start to shut
 down the connection, and call rdma_destroy_qp on our cm_id. ... Now
 apparently a 'connect reject' message comes in from the other host,
 and cma_ib_handler() is called with an event of IB_CM_REJ_RECEIVED.
 It calls cma_modify_qp_err, which for some odd reason tries to modify
 the exact same QP we just destroyed."

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/core/cma.c | 90 ++++++++++++++++++++++++++++---------------
 1 file changed, 60 insertions(+), 30 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 93644f82592c..01ae052ac3f4 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -121,6 +121,8 @@ struct rdma_id_private {
 
 	enum cma_state		state;
 	spinlock_t		lock;
+	struct mutex		qp_mutex;
+
 	struct completion	comp;
 	atomic_t		refcount;
 	wait_queue_head_t	wait_remove;
@@ -389,6 +391,7 @@ struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
 	id_priv->id.event_handler = event_handler;
 	id_priv->id.ps = ps;
 	spin_lock_init(&id_priv->lock);
+	mutex_init(&id_priv->qp_mutex);
 	init_completion(&id_priv->comp);
 	atomic_set(&id_priv->refcount, 1);
 	init_waitqueue_head(&id_priv->wait_remove);
@@ -474,61 +477,86 @@ EXPORT_SYMBOL(rdma_create_qp);
 
 void rdma_destroy_qp(struct rdma_cm_id *id)
 {
-	ib_destroy_qp(id->qp);
+	struct rdma_id_private *id_priv;
+
+	id_priv = container_of(id, struct rdma_id_private, id);
+	mutex_lock(&id_priv->qp_mutex);
+	ib_destroy_qp(id_priv->id.qp);
+	id_priv->id.qp = NULL;
+	mutex_unlock(&id_priv->qp_mutex);
 }
 EXPORT_SYMBOL(rdma_destroy_qp);
 
-static int cma_modify_qp_rtr(struct rdma_cm_id *id)
+static int cma_modify_qp_rtr(struct rdma_id_private *id_priv)
 {
 	struct ib_qp_attr qp_attr;
 	int qp_attr_mask, ret;
 
-	if (!id->qp)
-		return 0;
+	mutex_lock(&id_priv->qp_mutex);
+	if (!id_priv->id.qp) {
+		ret = 0;
+		goto out;
+	}
 
 	/* Need to update QP attributes from default values. */
 	qp_attr.qp_state = IB_QPS_INIT;
-	ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
+	ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 	if (ret)
-		return ret;
+		goto out;
 
-	ret = ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
+	ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
 	if (ret)
-		return ret;
+		goto out;
 
 	qp_attr.qp_state = IB_QPS_RTR;
-	ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
+	ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 	if (ret)
-		return ret;
+		goto out;
 
-	return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
+	ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
+out:
+	mutex_unlock(&id_priv->qp_mutex);
+	return ret;
 }
 
-static int cma_modify_qp_rts(struct rdma_cm_id *id)
+static int cma_modify_qp_rts(struct rdma_id_private *id_priv)
 {
 	struct ib_qp_attr qp_attr;
 	int qp_attr_mask, ret;
 
-	if (!id->qp)
-		return 0;
+	mutex_lock(&id_priv->qp_mutex);
+	if (!id_priv->id.qp) {
+		ret = 0;
+		goto out;
+	}
 
 	qp_attr.qp_state = IB_QPS_RTS;
-	ret = rdma_init_qp_attr(id, &qp_attr, &qp_attr_mask);
+	ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
 	if (ret)
-		return ret;
+		goto out;
 
-	return ib_modify_qp(id->qp, &qp_attr, qp_attr_mask);
+	ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
+out:
+	mutex_unlock(&id_priv->qp_mutex);
+	return ret;
 }
 
-static int cma_modify_qp_err(struct rdma_cm_id *id)
+static int cma_modify_qp_err(struct rdma_id_private *id_priv)
 {
 	struct ib_qp_attr qp_attr;
+	int ret;
 
-	if (!id->qp)
-		return 0;
+	mutex_lock(&id_priv->qp_mutex);
+	if (!id_priv->id.qp) {
+		ret = 0;
+		goto out;
+	}
 
 	qp_attr.qp_state = IB_QPS_ERR;
-	return ib_modify_qp(id->qp, &qp_attr, IB_QP_STATE);
+	ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
+out:
+	mutex_unlock(&id_priv->qp_mutex);
+	return ret;
 }
 
 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
@@ -857,11 +885,11 @@ static int cma_rep_recv(struct rdma_id_private *id_priv)
 {
 	int ret;
 
-	ret = cma_modify_qp_rtr(&id_priv->id);
+	ret = cma_modify_qp_rtr(id_priv);
 	if (ret)
 		goto reject;
 
-	ret = cma_modify_qp_rts(&id_priv->id);
+	ret = cma_modify_qp_rts(id_priv);
 	if (ret)
 		goto reject;
 
@@ -871,7 +899,7 @@ static int cma_rep_recv(struct rdma_id_private *id_priv)
 
 	return 0;
 reject:
-	cma_modify_qp_err(&id_priv->id);
+	cma_modify_qp_err(id_priv);
 	ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
 		       NULL, 0, NULL, 0);
 	return ret;
@@ -947,7 +975,7 @@ static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
 		/* ignore event */
 		goto out;
 	case IB_CM_REJ_RECEIVED:
-		cma_modify_qp_err(&id_priv->id);
+		cma_modify_qp_err(id_priv);
 		event.status = ib_event->param.rej_rcvd.reason;
 		event.event = RDMA_CM_EVENT_REJECTED;
 		event.param.conn.private_data = ib_event->private_data;
@@ -2264,7 +2292,7 @@ static int cma_connect_iw(struct rdma_id_private *id_priv,
 	sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
 	cm_id->remote_addr = *sin;
 
-	ret = cma_modify_qp_rtr(&id_priv->id);
+	ret = cma_modify_qp_rtr(id_priv);
 	if (ret)
 		goto out;
 
@@ -2331,7 +2359,7 @@ static int cma_accept_ib(struct rdma_id_private *id_priv,
 	int qp_attr_mask, ret;
 
 	if (id_priv->id.qp) {
-		ret = cma_modify_qp_rtr(&id_priv->id);
+		ret = cma_modify_qp_rtr(id_priv);
 		if (ret)
 			goto out;
 
@@ -2370,7 +2398,7 @@ static int cma_accept_iw(struct rdma_id_private *id_priv,
 	struct iw_cm_conn_param iw_param;
 	int ret;
 
-	ret = cma_modify_qp_rtr(&id_priv->id);
+	ret = cma_modify_qp_rtr(id_priv);
 	if (ret)
 		return ret;
 
@@ -2442,7 +2470,7 @@ int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
 
 	return 0;
 reject:
-	cma_modify_qp_err(id);
+	cma_modify_qp_err(id_priv);
 	rdma_reject(id, NULL, 0);
 	return ret;
 }
@@ -2512,7 +2540,7 @@ int rdma_disconnect(struct rdma_cm_id *id)
 
 	switch (rdma_node_get_transport(id->device->node_type)) {
 	case RDMA_TRANSPORT_IB:
-		ret = cma_modify_qp_err(id);
+		ret = cma_modify_qp_err(id_priv);
 		if (ret)
 			goto out;
 		/* Initiate or respond to a disconnect. */
@@ -2543,9 +2571,11 @@ static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
 	    cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
 		return 0;
 
+	mutex_lock(&id_priv->qp_mutex);
 	if (!status && id_priv->id.qp)
 		status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
 					 multicast->rec.mlid);
+	mutex_unlock(&id_priv->qp_mutex);
 
 	memset(&event, 0, sizeof event);
 	event.status = status;
-- 
cgit v1.2.3-58-ga151


From d02d1f5359e795bac9a4461698521680cddd782b Mon Sep 17 00:00:00 2001
From: Sean Hefty <sean.hefty@intel.com>
Date: Tue, 9 Oct 2007 11:12:34 -0700
Subject: RDMA/cma: Fix deadlock destroying listen requests

Deadlock condition reported by Kanoj Sarcar <kanoj@netxen.com>.
The deadlock occurs when a connection request arrives at the same
time that a wildcard listen is being destroyed.

A wildcard listen maintains per device listen requests for each
RDMA device in the system.  The per device listens are automatically
added and removed when RDMA devices are inserted or removed from
the system.

When a wildcard listen is destroyed, rdma_destroy_id() acquires
the rdma_cm's device mutex ('lock') to protect against hot-plug
events adding or removing per device listens.  It then tries to
destroy the per device listens by calling ib_destroy_cm_id() or
iw_destroy_cm_id().  It does this while holding the device mutex.

However, if the underlying iw/ib CM reports a connection request
while this is occurring, the rdma_cm callback function will try
to acquire the same device mutex.  Since we're in a callback,
the ib_destroy_cm_id() or iw_destroy_cm_id() calls will block until
their callback thread returns, but the callback is blocked waiting for
the device mutex.

Fix this by re-working how per device listens are destroyed.  Use
rdma_destroy_id(), which avoids the deadlock, in place of
cma_destroy_listen().  Additional synchronization is added to handle
device hot-plug events and ensure that the id is not destroyed twice.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/core/cma.c | 70 ++++++++++++++-----------------------------
 1 file changed, 23 insertions(+), 47 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 01ae052ac3f4..ee946cc2576b 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -114,11 +114,12 @@ struct rdma_id_private {
 
 	struct rdma_bind_list	*bind_list;
 	struct hlist_node	node;
-	struct list_head	list;
-	struct list_head	listen_list;
+	struct list_head	list; /* listen_any_list or cma_device.list */
+	struct list_head	listen_list; /* per device listens */
 	struct cma_device	*cma_dev;
 	struct list_head	mc_list;
 
+	int			internal_id;
 	enum cma_state		state;
 	spinlock_t		lock;
 	struct mutex		qp_mutex;
@@ -745,50 +746,27 @@ static void cma_cancel_route(struct rdma_id_private *id_priv)
 	}
 }
 
-static inline int cma_internal_listen(struct rdma_id_private *id_priv)
-{
-	return (id_priv->state == CMA_LISTEN) && id_priv->cma_dev &&
-	       cma_any_addr(&id_priv->id.route.addr.src_addr);
-}
-
-static void cma_destroy_listen(struct rdma_id_private *id_priv)
-{
-	cma_exch(id_priv, CMA_DESTROYING);
-
-	if (id_priv->cma_dev) {
-		switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
-		case RDMA_TRANSPORT_IB:
-			if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
-				ib_destroy_cm_id(id_priv->cm_id.ib);
-			break;
-		case RDMA_TRANSPORT_IWARP:
-			if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
-				iw_destroy_cm_id(id_priv->cm_id.iw);
-			break;
-		default:
-			break;
-		}
-		cma_detach_from_dev(id_priv);
-	}
-	list_del(&id_priv->listen_list);
-
-	cma_deref_id(id_priv);
-	wait_for_completion(&id_priv->comp);
-
-	kfree(id_priv);
-}
-
 static void cma_cancel_listens(struct rdma_id_private *id_priv)
 {
 	struct rdma_id_private *dev_id_priv;
 
+	/*
+	 * Remove from listen_any_list to prevent added devices from spawning
+	 * additional listen requests.
+	 */
 	mutex_lock(&lock);
 	list_del(&id_priv->list);
 
 	while (!list_empty(&id_priv->listen_list)) {
 		dev_id_priv = list_entry(id_priv->listen_list.next,
 					 struct rdma_id_private, listen_list);
-		cma_destroy_listen(dev_id_priv);
+		/* sync with device removal to avoid duplicate destruction */
+		list_del_init(&dev_id_priv->list);
+		list_del(&dev_id_priv->listen_list);
+		mutex_unlock(&lock);
+
+		rdma_destroy_id(&dev_id_priv->id);
+		mutex_lock(&lock);
 	}
 	mutex_unlock(&lock);
 }
@@ -876,6 +854,9 @@ void rdma_destroy_id(struct rdma_cm_id *id)
 	cma_deref_id(id_priv);
 	wait_for_completion(&id_priv->comp);
 
+	if (id_priv->internal_id)
+		cma_deref_id(id_priv->id.context);
+
 	kfree(id_priv->id.route.path_rec);
 	kfree(id_priv);
 }
@@ -1432,14 +1413,13 @@ static void cma_listen_on_dev(struct rdma_id_private *id_priv,
 
 	cma_attach_to_dev(dev_id_priv, cma_dev);
 	list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
+	atomic_inc(&id_priv->refcount);
+	dev_id_priv->internal_id = 1;
 
 	ret = rdma_listen(id, id_priv->backlog);
 	if (ret)
-		goto err;
-
-	return;
-err:
-	cma_destroy_listen(dev_id_priv);
+		printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
+		       "listening on device %s", ret, cma_dev->device->name);
 }
 
 static void cma_listen_on_all(struct rdma_id_private *id_priv)
@@ -2787,16 +2767,12 @@ static void cma_process_remove(struct cma_device *cma_dev)
 		id_priv = list_entry(cma_dev->id_list.next,
 				     struct rdma_id_private, list);
 
-		if (cma_internal_listen(id_priv)) {
-			cma_destroy_listen(id_priv);
-			continue;
-		}
-
+		list_del(&id_priv->listen_list);
 		list_del_init(&id_priv->list);
 		atomic_inc(&id_priv->refcount);
 		mutex_unlock(&lock);
 
-		ret = cma_remove_id_dev(id_priv);
+		ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
 		cma_deref_id(id_priv);
 		if (ret)
 			rdma_destroy_id(&id_priv->id);
-- 
cgit v1.2.3-58-ga151


From 69fc507a1424ce31d2096be5b1e5b1750bdfe235 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Mon, 15 Oct 2007 00:50:56 -0500
Subject: IPoIB: Use round_jiffies() for ah_reap_task

Use round_jiffies() to align the 1 second ah_reap_task with other work
and potentially save power by sleeping cores for longer.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/ulp/ipoib/ipoib_ib.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index 1a77e79f6b43..6a5f9fc07fb2 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -436,7 +436,8 @@ void ipoib_reap_ah(struct work_struct *work)
 	__ipoib_reap_ah(dev);
 
 	if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
-		queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+		queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
+				   round_jiffies_relative(HZ));
 }
 
 int ipoib_ib_dev_open(struct net_device *dev)
@@ -472,7 +473,8 @@ int ipoib_ib_dev_open(struct net_device *dev)
 	}
 
 	clear_bit(IPOIB_STOP_REAPER, &priv->flags);
-	queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+	queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
+			   round_jiffies_relative(HZ));
 
 	set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
 
-- 
cgit v1.2.3-58-ga151


From c0c84d566ddc8dbdd3ceab23865a688c36217338 Mon Sep 17 00:00:00 2001
From: Joachim Fenkes <fenkes@de.ibm.com>
Date: Tue, 16 Oct 2007 17:24:07 +0200
Subject: IB/ehca: Supply QP token for SRQ base QPs

Because hardware reports the SRQ token in RWQEs of SRQ base QPs, supply the
base QP token as SRQ token, so we can properly find the SRQ base QP.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/ehca/ehca_qp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index e2bd62be11e7..de182648b282 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -451,7 +451,6 @@ static struct ehca_qp *internal_create_qp(
 		has_srq = 1;
 		parms.ext_type = EQPT_SRQBASE;
 		parms.srq_qpn = my_srq->real_qp_num;
-		parms.srq_token = my_srq->token;
 	}
 
 	if (is_llqp && has_srq) {
@@ -583,6 +582,9 @@ static struct ehca_qp *internal_create_qp(
 		goto create_qp_exit1;
 	}
 
+	if (has_srq)
+		parms.srq_token = my_qp->token;
+
 	parms.servicetype = ibqptype2servicetype(qp_type);
 	if (parms.servicetype < 0) {
 		ret = -EINVAL;
-- 
cgit v1.2.3-58-ga151


From 9511724da9c090da5a6dcf6c557b1cedc4f5cfd7 Mon Sep 17 00:00:00 2001
From: Joachim Fenkes <fenkes@de.ibm.com>
Date: Tue, 16 Oct 2007 17:25:50 +0200
Subject: IB/ehca: Fix masking error in {,re}reg_phys_mr()

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/ehca/ehca_mrmw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c
index da88738265ed..16c9efd8eeac 100644
--- a/drivers/infiniband/hw/ehca/ehca_mrmw.c
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -259,7 +259,7 @@ struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
 		pginfo.u.phy.num_phys_buf = num_phys_buf;
 		pginfo.u.phy.phys_buf_array = phys_buf_array;
 		pginfo.next_hwpage =
-			((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
+			((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 
 		ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
 				  e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
@@ -547,7 +547,7 @@ int ehca_rereg_phys_mr(struct ib_mr *mr,
 		pginfo.u.phy.num_phys_buf = num_phys_buf;
 		pginfo.u.phy.phys_buf_array = phys_buf_array;
 		pginfo.next_hwpage =
-			((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
+			((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 	}
 	if (mr_rereg_mask & IB_MR_REREG_ACCESS)
 		new_acl = mr_access_flags;
-- 
cgit v1.2.3-58-ga151


From 8c08d50d4fc52a9367c356ebbeb194c30fbc7ac8 Mon Sep 17 00:00:00 2001
From: Joachim Fenkes <fenkes@de.ibm.com>
Date: Tue, 16 Oct 2007 17:26:54 +0200
Subject: IB/ehca: Fix ehca_encode_hwpage_size() and alloc_fmr()

Simplify ehca_encode_hwpage_size(), fixing an infinite loop for pgsize == 0
in the process. Fix the bug in alloc_fmr() that triggered the loop.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/ehca/ehca_mrmw.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c
index 16c9efd8eeac..b9a788c4fdd1 100644
--- a/drivers/infiniband/hw/ehca/ehca_mrmw.c
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -72,17 +72,9 @@ enum ehca_mr_pgsize {
 
 static u32 ehca_encode_hwpage_size(u32 pgsize)
 {
-	u32 idx = 0;
-	pgsize >>= 12;
-	/*
-	 * map mr page size into hw code:
-	 * 0, 1, 2, 3 for 4K, 64K, 1M, 64M
-	 */
-	while (!(pgsize & 1)) {
-		idx++;
-		pgsize >>= 4;
-	}
-	return idx;
+	int log = ilog2(pgsize);
+	WARN_ON(log < 12 || log > 24 || log & 3);
+	return (log - 12) / 4;
 }
 
 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
@@ -826,6 +818,7 @@ struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
 
 	/* register MR on HCA */
 	memset(&pginfo, 0, sizeof(pginfo));
+	pginfo.hwpage_size = hw_pgsize;
 	/*
 	 * pginfo.num_hwpages==0, ie register_rpages() will not be called
 	 * but deferred to map_phys_fmr()
-- 
cgit v1.2.3-58-ga151


From abc39d3672d8af4bf6c943faf85fa8877caccf7e Mon Sep 17 00:00:00 2001
From: Joachim Fenkes <fenkes@de.ibm.com>
Date: Tue, 16 Oct 2007 17:31:14 +0200
Subject: IB/ehca: Change meaning of hca_cap_mr_pgsize

ehca_shca.hca_cap_mr_pgsize now contains all supported page sizes ORed
together. This makes some checks easier to code and understand, plus
we can return this value verbatim in query_hca(), fixing a problem
with SRP (reported by Anton Blanchard -- thanks!).

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/ehca/ehca_classes.h |  1 -
 drivers/infiniband/hw/ehca/ehca_hca.c     |  1 +
 drivers/infiniband/hw/ehca/ehca_main.c    | 18 +++++++++++++--
 drivers/infiniband/hw/ehca/ehca_mrmw.c    | 38 +++++++++++++++----------------
 4 files changed, 36 insertions(+), 22 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index 0f7a55d35ea7..365bc5dfcc88 100644
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ b/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -323,7 +323,6 @@ extern int ehca_static_rate;
 extern int ehca_port_act_time;
 extern int ehca_use_hp_mr;
 extern int ehca_scaling_code;
-extern int ehca_mr_largepage;
 
 struct ipzu_queue_resp {
 	u32 qe_size;      /* queue entry size */
diff --git a/drivers/infiniband/hw/ehca/ehca_hca.c b/drivers/infiniband/hw/ehca/ehca_hca.c
index 4aa3ffa6a19f..15806d140461 100644
--- a/drivers/infiniband/hw/ehca/ehca_hca.c
+++ b/drivers/infiniband/hw/ehca/ehca_hca.c
@@ -77,6 +77,7 @@ int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
 	}
 
 	memset(props, 0, sizeof(struct ib_device_attr));
+	props->page_size_cap   = shca->hca_cap_mr_pgsize;
 	props->fw_ver          = rblock->hw_ver;
 	props->max_mr_size     = rblock->max_mr_size;
 	props->vendor_id       = rblock->vendor_id >> 8;
diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index 403467f66fe6..d477dc3b4760 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -260,13 +260,20 @@ static struct cap_descr {
 	{ HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 };
 
-int ehca_sense_attributes(struct ehca_shca *shca)
+static int ehca_sense_attributes(struct ehca_shca *shca)
 {
 	int i, ret = 0;
 	u64 h_ret;
 	struct hipz_query_hca *rblock;
 	struct hipz_query_port *port;
 
+	static const u32 pgsize_map[] = {
+		HCA_CAP_MR_PGSIZE_4K,  0x1000,
+		HCA_CAP_MR_PGSIZE_64K, 0x10000,
+		HCA_CAP_MR_PGSIZE_1M,  0x100000,
+		HCA_CAP_MR_PGSIZE_16M, 0x1000000,
+	};
+
 	rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 	if (!rblock) {
 		ehca_gen_err("Cannot allocate rblock memory.");
@@ -329,8 +336,15 @@ int ehca_sense_attributes(struct ehca_shca *shca)
 		if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 			ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 
-	shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
+	/* translate supported MR page sizes; always support 4K */
+	shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
+	if (ehca_mr_largepage) { /* support extra sizes only if enabled */
+		for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
+			if (rblock->memory_page_size_supported & pgsize_map[i])
+				shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
+	}
 
+	/* query max MTU from first port -- it's the same for all ports */
 	port = (struct hipz_query_port *)rblock;
 	h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 	if (h_ret != H_SUCCESS) {
diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c
index b9a788c4fdd1..bb9791555f49 100644
--- a/drivers/infiniband/hw/ehca/ehca_mrmw.c
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -79,9 +79,7 @@ static u32 ehca_encode_hwpage_size(u32 pgsize)
 
 static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca)
 {
-	if (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)
-		return EHCA_MR_PGSIZE16M;
-	return EHCA_MR_PGSIZE4K;
+	return 1UL << ilog2(shca->hca_cap_mr_pgsize);
 }
 
 static struct ehca_mr *ehca_mr_new(void)
@@ -288,7 +286,7 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 		container_of(pd->device, struct ehca_shca, ib_device);
 	struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
 	struct ehca_mr_pginfo pginfo;
-	int ret;
+	int ret, page_shift;
 	u32 num_kpages;
 	u32 num_hwpages;
 	u64 hwpage_size;
@@ -343,19 +341,20 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 	/* determine number of MR pages */
 	num_kpages = NUM_CHUNKS((virt % PAGE_SIZE) + length, PAGE_SIZE);
 	/* select proper hw_pgsize */
-	if (ehca_mr_largepage &&
-	    (shca->hca_cap_mr_pgsize & HCA_CAP_MR_PGSIZE_16M)) {
-		int page_shift = PAGE_SHIFT;
-		if (e_mr->umem->hugetlb) {
-			/* determine page_shift, clamp between 4K and 16M */
-			page_shift = (fls64(length - 1) + 3) & ~3;
-			page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
-					 EHCA_MR_PGSHIFT16M);
-		}
-		hwpage_size = 1UL << page_shift;
-	} else
-		hwpage_size = EHCA_MR_PGSIZE4K; /* ehca1 only supports 4k */
-	ehca_dbg(pd->device, "hwpage_size=%lx", hwpage_size);
+	page_shift = PAGE_SHIFT;
+	if (e_mr->umem->hugetlb) {
+		/* determine page_shift, clamp between 4K and 16M */
+		page_shift = (fls64(length - 1) + 3) & ~3;
+		page_shift = min(max(page_shift, EHCA_MR_PGSHIFT4K),
+				 EHCA_MR_PGSHIFT16M);
+	}
+	hwpage_size = 1UL << page_shift;
+
+	/* now that we have the desired page size, shift until it's
+	 * supported, too. 4K is always supported, so this terminates.
+	 */
+	while (!(hwpage_size & shca->hca_cap_mr_pgsize))
+		hwpage_size >>= 4;
 
 reg_user_mr_fallback:
 	num_hwpages = NUM_CHUNKS((virt % hwpage_size) + length, hwpage_size);
@@ -801,8 +800,9 @@ struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
 		ib_fmr = ERR_PTR(-EINVAL);
 		goto alloc_fmr_exit0;
 	}
-	hw_pgsize = ehca_get_max_hwpage_size(shca);
-	if ((1 << fmr_attr->page_shift) != hw_pgsize) {
+
+	hw_pgsize = 1 << fmr_attr->page_shift;
+	if (!(hw_pgsize & shca->hca_cap_mr_pgsize)) {
 		ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
 			 fmr_attr->page_shift);
 		ib_fmr = ERR_PTR(-EINVAL);
-- 
cgit v1.2.3-58-ga151


From 8da9ee9c1ec9036d8fad82f6ddbc4d15143cc6ca Mon Sep 17 00:00:00 2001
From: Joachim Fenkes <fenkes@de.ibm.com>
Date: Tue, 16 Oct 2007 17:31:59 +0200
Subject: IB/ehca: Enable large page MRs by default

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/ehca/ehca_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index d477dc3b4760..2f51c13d2f49 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -65,7 +65,7 @@ int ehca_port_act_time = 30;
 int ehca_poll_all_eqs  = 1;
 int ehca_static_rate   = -1;
 int ehca_scaling_code  = 0;
-int ehca_mr_largepage  = 0;
+int ehca_mr_largepage  = 1;
 
 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
-- 
cgit v1.2.3-58-ga151


From fd312561adcc90e924f35d3032d5493aeb4c3017 Mon Sep 17 00:00:00 2001
From: Roland Dreier <rolandd@cisco.com>
Date: Wed, 17 Oct 2007 21:54:44 -0700
Subject: IPoIB: Rewrite "if (!likely(...))" as "if (unlikely(!(...)))"

It's too hard to figure out what "!likely(...)" really means, and who
knows how compilers interpret the hint.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/ulp/ipoib/ipoib_cm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 0a0dcb8fdfd1..ddf0c54493c8 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -434,7 +434,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
 		goto repost;
 	}
 
-	if (!likely(wr_id & IPOIB_CM_RX_UPDATE_MASK)) {
+	if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) {
 		p = wc->qp->qp_context;
 		if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) {
 			spin_lock_irqsave(&priv->lock, flags);
-- 
cgit v1.2.3-58-ga151


From 839041329fd3410e07d614f81e75bb43367d8f89 Mon Sep 17 00:00:00 2001
From: Jack Morgenstein <jackm@dev.mellanox.co.il>
Date: Thu, 18 Oct 2007 17:36:43 +0200
Subject: IB/mlx4: Sanity check userspace send queue sizes

Add sanity checks to send queue sizes passed in from userspace. The
minimum sq stride value below is taken from the MT25408 PRM (section
11.10, Table 306, log_sq_stride definition).

Without this check, userspace can submit arbitrarily large/small
values for the number of WQEs and the stride, which can crash the
kernel.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/hw/mlx4/qp.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 31a480e5b0d0..6b3322486b5e 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -63,6 +63,10 @@ struct mlx4_ib_sqp {
 	u8			header_buf[MLX4_IB_UD_HEADER_SIZE];
 };
 
+enum {
+	MLX4_IB_MIN_SQ_STRIDE = 6
+};
+
 static const __be32 mlx4_ib_opcode[] = {
 	[IB_WR_SEND]			= __constant_cpu_to_be32(MLX4_OPCODE_SEND),
 	[IB_WR_SEND_WITH_IMM]		= __constant_cpu_to_be32(MLX4_OPCODE_SEND_IMM),
@@ -285,9 +289,17 @@ static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
 	return 0;
 }
 
-static int set_user_sq_size(struct mlx4_ib_qp *qp,
+static int set_user_sq_size(struct mlx4_ib_dev *dev,
+			    struct mlx4_ib_qp *qp,
 			    struct mlx4_ib_create_qp *ucmd)
 {
+	/* Sanity check SQ size before proceeding */
+	if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes	 ||
+	    ucmd->log_sq_stride >
+		ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
+	    ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
+		return -EINVAL;
+
 	qp->sq.wqe_cnt   = 1 << ucmd->log_sq_bb_count;
 	qp->sq.wqe_shift = ucmd->log_sq_stride;
 
@@ -330,7 +342,7 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
 
 		qp->sq_no_prefetch = ucmd.sq_no_prefetch;
 
-		err = set_user_sq_size(qp, &ucmd);
+		err = set_user_sq_size(dev, qp, &ucmd);
 		if (err)
 			goto err;
 
-- 
cgit v1.2.3-58-ga151


From cbfb50e6e2e9c580848c0f51d37c24cdfb1cb704 Mon Sep 17 00:00:00 2001
From: Roland Dreier <rolandd@cisco.com>
Date: Fri, 19 Oct 2007 20:01:43 -0700
Subject: IB/uverbs: Fix checking of userspace object ownership

Commit 9ead190b ("IB/uverbs: Don't serialize with ib_uverbs_idr_mutex")
rewrote how userspace objects are looked up in the uverbs module's
idrs, and introduced a severe bug in the process: there is no checking
that an operation is being performed by the right process any more.
Fix this by adding the missing check of uobj->context in __idr_get_uobj().

Apparently everyone is being very careful to only touch their own
objects, because this bug was introduced in June 2006 in 2.6.18, and
has gone undetected until now.

Cc: stable <stable@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/core/uverbs_cmd.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 01d70084aebe..495c803fb11d 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -147,8 +147,12 @@ static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 
 	spin_lock(&ib_uverbs_idr_lock);
 	uobj = idr_find(idr, id);
-	if (uobj)
-		kref_get(&uobj->ref);
+	if (uobj) {
+		if (uobj->context == context)
+			kref_get(&uobj->ref);
+		else
+			uobj = NULL;
+	}
 	spin_unlock(&ib_uverbs_idr_lock);
 
 	return uobj;
-- 
cgit v1.2.3-58-ga151


From 1b524963fd2d7fb20ea68df497151aa9d17fbca4 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@mellanox.co.il>
Date: Thu, 16 Aug 2007 15:36:16 +0300
Subject: IPoIB/cm: Use common CQ for CM send completions

Use the same CQ for CM send completions as for all other IPoIB
completions.  This means all completions are processed via the same
NAPI polling routine.  This should help reduce the number of
interrupts for bi-directional traffic (such as TCP) and fixes "driver
is hogging interrupts" errors reported for IPoIB send side, e.g.
<https://bugs.openfabrics.org/show_bug.cgi?id=508>

To do this, keep a per-interface counter of outstanding send WRs, and
stop the interface when this counter reaches the send queue size to
avoid CQ overruns.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
 drivers/infiniband/ulp/ipoib/ipoib.h      |  15 ++--
 drivers/infiniband/ulp/ipoib/ipoib_cm.c   | 112 ++++++++++++------------------
 drivers/infiniband/ulp/ipoib/ipoib_ib.c   |  46 +++++++-----
 drivers/infiniband/ulp/ipoib/ipoib_main.c |   4 +-
 4 files changed, 82 insertions(+), 95 deletions(-)

(limited to 'drivers/infiniband')

diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index 6545fa798b12..0a00ea0e887d 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -84,9 +84,8 @@ enum {
 	IPOIB_MCAST_RUN 	  = 6,
 	IPOIB_STOP_REAPER         = 7,
 	IPOIB_MCAST_STARTED       = 8,
-	IPOIB_FLAG_NETIF_STOPPED  = 9,
-	IPOIB_FLAG_ADMIN_CM 	  = 10,
-	IPOIB_FLAG_UMCAST	  = 11,
+	IPOIB_FLAG_ADMIN_CM 	  = 9,
+	IPOIB_FLAG_UMCAST	  = 10,
 
 	IPOIB_MAX_BACKOFF_SECONDS = 16,
 
@@ -98,9 +97,9 @@ enum {
 
 #define	IPOIB_OP_RECV   (1ul << 31)
 #ifdef CONFIG_INFINIBAND_IPOIB_CM
-#define	IPOIB_CM_OP_SRQ (1ul << 30)
+#define	IPOIB_OP_CM     (1ul << 30)
 #else
-#define	IPOIB_CM_OP_SRQ (0)
+#define	IPOIB_OP_CM     (0)
 #endif
 
 /* structs */
@@ -197,7 +196,6 @@ struct ipoib_cm_rx {
 
 struct ipoib_cm_tx {
 	struct ib_cm_id     *id;
-	struct ib_cq        *cq;
 	struct ib_qp        *qp;
 	struct list_head     list;
 	struct net_device   *dev;
@@ -294,6 +292,7 @@ struct ipoib_dev_priv {
 	unsigned             tx_tail;
 	struct ib_sge        tx_sge;
 	struct ib_send_wr    tx_wr;
+	unsigned             tx_outstanding;
 
 	struct ib_wc ibwc[IPOIB_NUM_WC];
 
@@ -502,6 +501,7 @@ void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
 void ipoib_cm_skb_too_long(struct net_device* dev, struct sk_buff *skb,
 			   unsigned int mtu);
 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
+void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
 #else
 
 struct ipoib_cm_tx;
@@ -590,6 +590,9 @@ static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *w
 {
 }
 
+static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
+{
+}
 #endif
 
 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index ddf0c54493c8..87610772a979 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -87,7 +87,7 @@ static int ipoib_cm_post_receive(struct net_device *dev, int id)
 	struct ib_recv_wr *bad_wr;
 	int i, ret;
 
-	priv->cm.rx_wr.wr_id = id | IPOIB_CM_OP_SRQ;
+	priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV;
 
 	for (i = 0; i < IPOIB_CM_RX_SG; ++i)
 		priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i];
@@ -401,7 +401,7 @@ static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space,
 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
-	unsigned int wr_id = wc->wr_id & ~IPOIB_CM_OP_SRQ;
+	unsigned int wr_id = wc->wr_id & ~(IPOIB_OP_CM | IPOIB_OP_RECV);
 	struct sk_buff *skb, *newskb;
 	struct ipoib_cm_rx *p;
 	unsigned long flags;
@@ -412,7 +412,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
 		       wr_id, wc->status);
 
 	if (unlikely(wr_id >= ipoib_recvq_size)) {
-		if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~IPOIB_CM_OP_SRQ)) {
+		if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~(IPOIB_OP_CM | IPOIB_OP_RECV))) {
 			spin_lock_irqsave(&priv->lock, flags);
 			list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list);
 			ipoib_cm_start_rx_drain(priv);
@@ -498,7 +498,7 @@ static inline int post_send(struct ipoib_dev_priv *priv,
 	priv->tx_sge.addr             = addr;
 	priv->tx_sge.length           = len;
 
-	priv->tx_wr.wr_id 	      = wr_id;
+	priv->tx_wr.wr_id 	      = wr_id | IPOIB_OP_CM;
 
 	return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr);
 }
@@ -549,20 +549,19 @@ void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_
 		dev->trans_start = jiffies;
 		++tx->tx_head;
 
-		if (tx->tx_head - tx->tx_tail == ipoib_sendq_size) {
+		if (++priv->tx_outstanding == ipoib_sendq_size) {
 			ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n",
 				  tx->qp->qp_num);
 			netif_stop_queue(dev);
-			set_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags);
 		}
 	}
 }
 
-static void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ipoib_cm_tx *tx,
-				  struct ib_wc *wc)
+void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
-	unsigned int wr_id = wc->wr_id;
+	struct ipoib_cm_tx *tx = wc->qp->qp_context;
+	unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM;
 	struct ipoib_tx_buf *tx_req;
 	unsigned long flags;
 
@@ -587,11 +586,10 @@ static void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ipoib_cm_tx *tx
 
 	spin_lock_irqsave(&priv->tx_lock, flags);
 	++tx->tx_tail;
-	if (unlikely(test_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags)) &&
-	    tx->tx_head - tx->tx_tail <= ipoib_sendq_size >> 1) {
-		clear_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags);
+	if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
+	    netif_queue_stopped(dev) &&
+	    test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
 		netif_wake_queue(dev);
-	}
 
 	if (wc->status != IB_WC_SUCCESS &&
 	    wc->status != IB_WC_WR_FLUSH_ERR) {
@@ -614,11 +612,6 @@ static void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ipoib_cm_tx *tx
 			tx->neigh = NULL;
 		}
 
-		/* queue would be re-started anyway when TX is destroyed,
-		 * but it makes sense to do it ASAP here. */
-		if (test_and_clear_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags))
-			netif_wake_queue(dev);
-
 		if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) {
 			list_move(&tx->list, &priv->cm.reap_list);
 			queue_work(ipoib_workqueue, &priv->cm.reap_task);
@@ -632,19 +625,6 @@ static void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ipoib_cm_tx *tx
 	spin_unlock_irqrestore(&priv->tx_lock, flags);
 }
 
-static void ipoib_cm_tx_completion(struct ib_cq *cq, void *tx_ptr)
-{
-	struct ipoib_cm_tx *tx = tx_ptr;
-	int n, i;
-
-	ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
-	do {
-		n = ib_poll_cq(cq, IPOIB_NUM_WC, tx->ibwc);
-		for (i = 0; i < n; ++i)
-			ipoib_cm_handle_tx_wc(tx->dev, tx, tx->ibwc + i);
-	} while (n == IPOIB_NUM_WC);
-}
-
 int ipoib_cm_dev_open(struct net_device *dev)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -807,17 +787,18 @@ static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *even
 	return 0;
 }
 
-static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ib_cq *cq)
+static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ipoib_cm_tx *tx)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	struct ib_qp_init_attr attr = {
-		.send_cq		= cq,
+		.send_cq		= priv->cq,
 		.recv_cq		= priv->cq,
 		.srq			= priv->cm.srq,
 		.cap.max_send_wr	= ipoib_sendq_size,
 		.cap.max_send_sge	= 1,
 		.sq_sig_type		= IB_SIGNAL_ALL_WR,
 		.qp_type		= IB_QPT_RC,
+		.qp_context		= tx
         };
 
 	return ib_create_qp(priv->pd, &attr);
@@ -899,21 +880,7 @@ static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn,
 		goto err_tx;
 	}
 
-	p->cq = ib_create_cq(priv->ca, ipoib_cm_tx_completion, NULL, p,
-			     ipoib_sendq_size + 1, 0);
-	if (IS_ERR(p->cq)) {
-		ret = PTR_ERR(p->cq);
-		ipoib_warn(priv, "failed to allocate tx cq: %d\n", ret);
-		goto err_cq;
-	}
-
-	ret = ib_req_notify_cq(p->cq, IB_CQ_NEXT_COMP);
-	if (ret) {
-		ipoib_warn(priv, "failed to request completion notification: %d\n", ret);
-		goto err_req_notify;
-	}
-
-	p->qp = ipoib_cm_create_tx_qp(p->dev, p->cq);
+	p->qp = ipoib_cm_create_tx_qp(p->dev, p);
 	if (IS_ERR(p->qp)) {
 		ret = PTR_ERR(p->qp);
 		ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret);
@@ -950,12 +917,8 @@ err_modify:
 err_id:
 	p->id = NULL;
 	ib_destroy_qp(p->qp);
-err_req_notify:
 err_qp:
 	p->qp = NULL;
-	ib_destroy_cq(p->cq);
-err_cq:
-	p->cq = NULL;
 err_tx:
 	return ret;
 }
@@ -964,6 +927,8 @@ static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(p->dev);
 	struct ipoib_tx_buf *tx_req;
+	unsigned long flags;
+	unsigned long begin;
 
 	ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n",
 		  p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail);
@@ -971,27 +936,40 @@ static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p)
 	if (p->id)
 		ib_destroy_cm_id(p->id);
 
-	if (p->qp)
-		ib_destroy_qp(p->qp);
-
-	if (p->cq)
-		ib_destroy_cq(p->cq);
-
-	if (test_bit(IPOIB_FLAG_NETIF_STOPPED, &p->flags))
-		netif_wake_queue(p->dev);
-
 	if (p->tx_ring) {
+		/* Wait for all sends to complete */
+		begin = jiffies;
 		while ((int) p->tx_tail - (int) p->tx_head < 0) {
-			tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)];
-			ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len,
-					 DMA_TO_DEVICE);
-			dev_kfree_skb_any(tx_req->skb);
-			++p->tx_tail;
+			if (time_after(jiffies, begin + 5 * HZ)) {
+				ipoib_warn(priv, "timing out; %d sends not completed\n",
+					   p->tx_head - p->tx_tail);
+				goto timeout;
+			}
+
+			msleep(1);
 		}
+	}
 
-		kfree(p->tx_ring);
+timeout:
+
+	while ((int) p->tx_tail - (int) p->tx_head < 0) {
+		tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)];
+		ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len,
+				    DMA_TO_DEVICE);
+		dev_kfree_skb_any(tx_req->skb);
+		++p->tx_tail;
+		spin_lock_irqsave(&priv->tx_lock, flags);
+		if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
+		    netif_queue_stopped(p->dev) &&
+		    test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
+			netif_wake_queue(p->dev);
+		spin_unlock_irqrestore(&priv->tx_lock, flags);
 	}
 
+	if (p->qp)
+		ib_destroy_qp(p->qp);
+
+	kfree(p->tx_ring);
 	kfree(p);
 }
 
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index 6a5f9fc07fb2..5063dd509ad2 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -267,11 +267,10 @@ static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
 
 	spin_lock_irqsave(&priv->tx_lock, flags);
 	++priv->tx_tail;
-	if (unlikely(test_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags)) &&
-	    priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1) {
-		clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
+	if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
+	    netif_queue_stopped(dev) &&
+	    test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
 		netif_wake_queue(dev);
-	}
 	spin_unlock_irqrestore(&priv->tx_lock, flags);
 
 	if (wc->status != IB_WC_SUCCESS &&
@@ -301,14 +300,18 @@ poll_more:
 		for (i = 0; i < n; i++) {
 			struct ib_wc *wc = priv->ibwc + i;
 
-			if (wc->wr_id & IPOIB_CM_OP_SRQ) {
-				++done;
-				ipoib_cm_handle_rx_wc(dev, wc);
-			} else if (wc->wr_id & IPOIB_OP_RECV) {
+			if (wc->wr_id & IPOIB_OP_RECV) {
 				++done;
-				ipoib_ib_handle_rx_wc(dev, wc);
-			} else
-				ipoib_ib_handle_tx_wc(dev, wc);
+				if (wc->wr_id & IPOIB_OP_CM)
+					ipoib_cm_handle_rx_wc(dev, wc);
+				else
+					ipoib_ib_handle_rx_wc(dev, wc);
+			} else {
+				if (wc->wr_id & IPOIB_OP_CM)
+					ipoib_cm_handle_tx_wc(dev, wc);
+				else
+					ipoib_ib_handle_tx_wc(dev, wc);
+			}
 		}
 
 		if (n != t)
@@ -401,10 +404,9 @@ void ipoib_send(struct net_device *dev, struct sk_buff *skb,
 		address->last_send = priv->tx_head;
 		++priv->tx_head;
 
-		if (priv->tx_head - priv->tx_tail == ipoib_sendq_size) {
+		if (++priv->tx_outstanding == ipoib_sendq_size) {
 			ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
 			netif_stop_queue(dev);
-			set_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
 		}
 	}
 }
@@ -563,12 +565,17 @@ void ipoib_drain_cq(struct net_device *dev)
 			if (priv->ibwc[i].status == IB_WC_SUCCESS)
 				priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
 
-			if (priv->ibwc[i].wr_id & IPOIB_CM_OP_SRQ)
-				ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
-			else if (priv->ibwc[i].wr_id & IPOIB_OP_RECV)
-				ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
-			else
-				ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
+			if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
+				if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
+					ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
+				else
+					ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
+			} else {
+				if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
+					ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
+				else
+					ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
+			}
 		}
 	} while (n == IPOIB_NUM_WC);
 }
@@ -614,6 +621,7 @@ int ipoib_ib_dev_stop(struct net_device *dev, int flush)
 						    DMA_TO_DEVICE);
 				dev_kfree_skb_any(tx_req->skb);
 				++priv->tx_tail;
+				--priv->tx_outstanding;
 			}
 
 			for (i = 0; i < ipoib_recvq_size; ++i) {
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index e072f3c32ce6..ace2345960ee 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -148,8 +148,6 @@ static int ipoib_stop(struct net_device *dev)
 
 	netif_stop_queue(dev);
 
-	clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
-
 	/*
 	 * Now flush workqueue to make sure a scheduled task doesn't
 	 * bring our internal state back up.
@@ -895,7 +893,7 @@ int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
 		goto out_rx_ring_cleanup;
 	}
 
-	/* priv->tx_head & tx_tail are already 0 */
+	/* priv->tx_head, tx_tail & tx_outstanding are already 0 */
 
 	if (ipoib_ib_dev_init(dev, ca, port))
 		goto out_tx_ring_cleanup;
-- 
cgit v1.2.3-58-ga151