Merge tag 'rdma-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull InfiniBand/RDMA changes from Roland Dreier:
 - Add ocrdma hardware driver for Emulex IB-over-Ethernet adapters
 - Add generic and mlx4 support for "raw" QPs: allow suitably privileged
   applications to send and receive arbitrary packets directly to/from
   the hardware
 - Add "doorbell drop" handling to the cxgb4 driver
 - A fairly large batch of qib hardware driver changes
 - A few fixes for lockdep-detected issues
 - A few other miscellaneous fixes and cleanups

Fix up trivial conflict in drivers/net/ethernet/emulex/benet/be.h.

* tag 'rdma-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (53 commits)
  RDMA/cxgb4: Include vmalloc.h for vmalloc and vfree
  IB/mlx4: Fix mlx4_ib_add() error flow
  IB/core: Fix IB_SA_COMP_MASK macro
  IB/iser: Fix error flow in iser ep connection establishment
  IB/mlx4: Increase the number of vectors (EQs) available for ULPs
  RDMA/cxgb4: Add query_qp support
  RDMA/cxgb4: Remove kfifo usage
  RDMA/cxgb4: Use vmalloc() for debugfs QP dump
  RDMA/cxgb4: DB Drop Recovery for RDMA and LLD queues
  RDMA/cxgb4: Disable interrupts in c4iw_ev_dispatch()
  RDMA/cxgb4: Add DB Overflow Avoidance
  RDMA/cxgb4: Add debugfs RDMA memory stats
  cxgb4: DB Drop Recovery for RDMA and LLD queues
  cxgb4: Common platform specific changes for DB Drop Recovery
  cxgb4: Detect DB FULL events and notify RDMA ULD
  RDMA/cxgb4: Drop peer_abort when no endpoint found
  RDMA/cxgb4: Always wake up waiters in c4iw_peer_abort_intr()
  mlx4_core: Change bitmap allocator to work in round-robin fashion
  RDMA/nes: Don't call event handler if pointer is NULL
  RDMA/nes: Fix for the ORD value of the connecting peer
  ...

4 files changed, 96 insertions, 71 deletions

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 59fbd704a1ec..55d5642eb10a 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1219,13 +1219,13 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
 	}
 	if (!conn_id) {
 		ret = -ENOMEM;
-		goto out;
+		goto err1;
 	}
 
 	mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
 	ret = cma_acquire_dev(conn_id);
 	if (ret)
-		goto release_conn_id;
+		goto err2;
 
 	conn_id->cm_id.ib = cm_id;
 	cm_id->context = conn_id;
@@ -1237,31 +1237,33 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
 	 */
 	atomic_inc(&conn_id->refcount);
 	ret = conn_id->id.event_handler(&conn_id->id, &event);
-	if (!ret) {
-		/*
-		 * Acquire mutex to prevent user executing rdma_destroy_id()
-		 * while we're accessing the cm_id.
-		 */
-		mutex_lock(&lock);
-		if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
-			ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
-		mutex_unlock(&lock);
-		mutex_unlock(&conn_id->handler_mutex);
-		cma_deref_id(conn_id);
-		goto out;
-	}
+	if (ret)
+		goto err3;
+
+	/*
+	 * Acquire mutex to prevent user executing rdma_destroy_id()
+	 * while we're accessing the cm_id.
+	 */
+	mutex_lock(&lock);
+	if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
+		ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
+	mutex_unlock(&lock);
+	mutex_unlock(&conn_id->handler_mutex);
+	mutex_unlock(&listen_id->handler_mutex);
 	cma_deref_id(conn_id);
+	return 0;
 
+err3:
+	cma_deref_id(conn_id);
 	/* Destroy the CM ID by returning a non-zero value. */
 	conn_id->cm_id.ib = NULL;
-
-release_conn_id:
+err2:
 	cma_exch(conn_id, RDMA_CM_DESTROYING);
 	mutex_unlock(&conn_id->handler_mutex);
-	rdma_destroy_id(&conn_id->id);
-
-out:
+err1:
 	mutex_unlock(&listen_id->handler_mutex);
+	if (conn_id)
+		rdma_destroy_id(&conn_id->id);
 	return ret;
 }
 
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 71f0c0f7df94..a84112322071 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -269,7 +269,7 @@ void ib_umem_release(struct ib_umem *umem)
 	} else
 		down_write(&mm->mmap_sem);
 
-	current->mm->locked_vm -= diff;
+	current->mm->pinned_vm -= diff;
 	up_write(&mm->mmap_sem);
 	mmput(mm);
 	kfree(umem);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 4d27e4c3fe34..f9d0d7c413a2 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -41,13 +41,18 @@
 
 #include "uverbs.h"
 
-static struct lock_class_key pd_lock_key;
-static struct lock_class_key mr_lock_key;
-static struct lock_class_key cq_lock_key;
-static struct lock_class_key qp_lock_key;
-static struct lock_class_key ah_lock_key;
-static struct lock_class_key srq_lock_key;
-static struct lock_class_key xrcd_lock_key;
+struct uverbs_lock_class {
+	struct lock_class_key	key;
+	char			name[16];
+};
+
+static struct uverbs_lock_class pd_lock_class	= { .name = "PD-uobj" };
+static struct uverbs_lock_class mr_lock_class	= { .name = "MR-uobj" };
+static struct uverbs_lock_class cq_lock_class	= { .name = "CQ-uobj" };
+static struct uverbs_lock_class qp_lock_class	= { .name = "QP-uobj" };
+static struct uverbs_lock_class ah_lock_class	= { .name = "AH-uobj" };
+static struct uverbs_lock_class srq_lock_class	= { .name = "SRQ-uobj" };
+static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
 
 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)			\
 	do {								\
@@ -83,13 +88,13 @@ static struct lock_class_key xrcd_lock_key;
  */
 
 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
-		      struct ib_ucontext *context, struct lock_class_key *key)
+		      struct ib_ucontext *context, struct uverbs_lock_class *c)
 {
 	uobj->user_handle = user_handle;
 	uobj->context     = context;
 	kref_init(&uobj->ref);
 	init_rwsem(&uobj->mutex);
-	lockdep_set_class(&uobj->mutex, key);
+	lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
 	uobj->live        = 0;
 }
 
@@ -522,7 +527,7 @@ ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 	if (!uobj)
 		return -ENOMEM;
 
-	init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
+	init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
 	down_write(&uobj->mutex);
 
 	pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
@@ -750,7 +755,7 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 		goto err_tree_mutex_unlock;
 	}
 
-	init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_key);
+	init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
 
 	down_write(&obj->uobject.mutex);
 
@@ -947,7 +952,7 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 	if (!uobj)
 		return -ENOMEM;
 
-	init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
+	init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
 	down_write(&uobj->mutex);
 
 	pd = idr_read_pd(cmd.pd_handle, file->ucontext);
@@ -1115,7 +1120,7 @@ ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 	if (!obj)
 		return -ENOMEM;
 
-	init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
+	init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
 	down_write(&obj->uobject.mutex);
 
 	if (cmd.comp_channel >= 0) {
@@ -1399,6 +1404,9 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 	if (copy_from_user(&cmd, buf, sizeof cmd))
 		return -EFAULT;
 
+	if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
+		return -EPERM;
+
 	INIT_UDATA(&udata, buf + sizeof cmd,
 		   (unsigned long) cmd.response + sizeof resp,
 		   in_len - sizeof cmd, out_len - sizeof resp);
@@ -1407,7 +1415,7 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 	if (!obj)
 		return -ENOMEM;
 
-	init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
+	init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
 	down_write(&obj->uevent.uobject.mutex);
 
 	if (cmd.qp_type == IB_QPT_XRC_TGT) {
@@ -1418,13 +1426,6 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 		}
 		device = xrcd->device;
 	} else {
-		pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
-		scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
-		if (!pd || !scq) {
-			ret = -EINVAL;
-			goto err_put;
-		}
-
 		if (cmd.qp_type == IB_QPT_XRC_INI) {
 			cmd.max_recv_wr = cmd.max_recv_sge = 0;
 		} else {
@@ -1435,13 +1436,24 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 					goto err_put;
 				}
 			}
-			rcq = (cmd.recv_cq_handle == cmd.send_cq_handle) ?
-			       scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
-			if (!rcq) {
-				ret = -EINVAL;
-				goto err_put;
+
+			if (cmd.recv_cq_handle != cmd.send_cq_handle) {
+				rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
+				if (!rcq) {
+					ret = -EINVAL;
+					goto err_put;
+				}
 			}
 		}
+
+		scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
+		rcq = rcq ?: scq;
+		pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
+		if (!pd || !scq) {
+			ret = -EINVAL;
+			goto err_put;
+		}
+
 		device = pd->device;
 	}
 
@@ -1585,7 +1597,7 @@ ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
 	if (!obj)
 		return -ENOMEM;
 
-	init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
+	init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
 	down_write(&obj->uevent.uobject.mutex);
 
 	xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
@@ -2272,7 +2284,7 @@ ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
 	if (!uobj)
 		return -ENOMEM;
 
-	init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
+	init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
 	down_write(&uobj->mutex);
 
 	pd = idr_read_pd(cmd.pd_handle, file->ucontext);
@@ -2476,30 +2488,30 @@ static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
 	if (!obj)
 		return -ENOMEM;
 
-	init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_key);
+	init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
 	down_write(&obj->uevent.uobject.mutex);
 
-	pd  = idr_read_pd(cmd->pd_handle, file->ucontext);
-	if (!pd) {
-		ret = -EINVAL;
-		goto err;
-	}
-
 	if (cmd->srq_type == IB_SRQT_XRC) {
-		attr.ext.xrc.cq  = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
-		if (!attr.ext.xrc.cq) {
-			ret = -EINVAL;
-			goto err_put_pd;
-		}
-
 		attr.ext.xrc.xrcd  = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
 		if (!attr.ext.xrc.xrcd) {
 			ret = -EINVAL;
-			goto err_put_cq;
+			goto err;
 		}
 
 		obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
 		atomic_inc(&obj->uxrcd->refcnt);
+
+		attr.ext.xrc.cq  = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
+		if (!attr.ext.xrc.cq) {
+			ret = -EINVAL;
+			goto err_put_xrcd;
+		}
+	}
+
+	pd  = idr_read_pd(cmd->pd_handle, file->ucontext);
+	if (!pd) {
+		ret = -EINVAL;
+		goto err_put_cq;
 	}
 
 	attr.event_handler  = ib_uverbs_srq_event_handler;
@@ -2576,17 +2588,17 @@ err_destroy:
 	ib_destroy_srq(srq);
 
 err_put:
-	if (cmd->srq_type == IB_SRQT_XRC) {
-		atomic_dec(&obj->uxrcd->refcnt);
-		put_uobj_read(xrcd_uobj);
-	}
+	put_pd_read(pd);
 
 err_put_cq:
 	if (cmd->srq_type == IB_SRQT_XRC)
 		put_cq_read(attr.ext.xrc.cq);
 
-err_put_pd:
-	put_pd_read(pd);
+err_put_xrcd:
+	if (cmd->srq_type == IB_SRQT_XRC) {
+		atomic_dec(&obj->uxrcd->refcnt);
+		put_uobj_read(xrcd_uobj);
+	}
 
 err:
 	put_uobj_write(&obj->uevent.uobject);
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 575b78045aaf..30f199e8579f 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -479,6 +479,7 @@ static const struct {
 				[IB_QPT_UD]  = (IB_QP_PKEY_INDEX		|
 						IB_QP_PORT			|
 						IB_QP_QKEY),
+				[IB_QPT_RAW_PACKET] = IB_QP_PORT,
 				[IB_QPT_UC]  = (IB_QP_PKEY_INDEX		|
 						IB_QP_PORT			|
 						IB_QP_ACCESS_FLAGS),
@@ -1183,23 +1184,33 @@ EXPORT_SYMBOL(ib_dealloc_fmr);
 
 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 {
+	int ret;
+
 	if (!qp->device->attach_mcast)
 		return -ENOSYS;
 	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 		return -EINVAL;
 
-	return qp->device->attach_mcast(qp, gid, lid);
+	ret = qp->device->attach_mcast(qp, gid, lid);
+	if (!ret)
+		atomic_inc(&qp->usecnt);
+	return ret;
 }
 EXPORT_SYMBOL(ib_attach_mcast);
 
 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 {
+	int ret;
+
 	if (!qp->device->detach_mcast)
 		return -ENOSYS;
 	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
 		return -EINVAL;
 
-	return qp->device->detach_mcast(qp, gid, lid);
+	ret = qp->device->detach_mcast(qp, gid, lid);
+	if (!ret)
+		atomic_dec(&qp->usecnt);
+	return ret;
 }
 EXPORT_SYMBOL(ib_detach_mcast);