Exemple #1
0
static void
roq_eth_cleanup_ofa(struct roq_eth_priv *vdev)
{
	int i;

	if (vdev->send_cq)
		ib_destroy_cq(vdev->send_cq);
	if (vdev->recv_cq && vdev->recv_cq != vdev->send_cq)
		ib_destroy_cq(vdev->recv_cq);

	if (vdev->qps) {
		for (i = 0; i < vdev->part_size; i++)
			if (vdev->qps[i])
				ib_destroy_qp(vdev->qps[i]);
		kfree(vdev->qps);
	}
	if (vdev->qps_rem) {
		for (i = 0; i < vdev->rem_part_size; i++)
			if (vdev->qps_rem[i])
				ib_destroy_qp(vdev->qps_rem[i]);
		kfree(vdev->qps_rem);
	}
	if (vdev->kpd)
		ib_dealloc_pd(vdev->kpd);

	vdev->qps = vdev->qps_rem = NULL;
	vdev->recv_cq = vdev->send_cq = NULL;

	vdev->kpd = NULL;

	return;
}
Exemple #2
0
/*
 * rpcrdma_ep_destroy
 *
 * Disconnect and destroy endpoint. After this, the only
 * valid operations on the ep are to free it (if dynamically
 * allocated) or re-create it.
 */
void
rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
{
	int rc;

	dprintk("RPC:       %s: entering, connected is %d\n",
		__func__, ep->rep_connected);

	cancel_delayed_work_sync(&ep->rep_connect_worker);

	if (ia->ri_id->qp) {
		rpcrdma_ep_disconnect(ep, ia);
		rdma_destroy_qp(ia->ri_id);
		ia->ri_id->qp = NULL;
	}

	rpcrdma_free_regbuf(ia, ep->rep_padbuf);

	rpcrdma_clean_cq(ep->rep_attr.recv_cq);
	rc = ib_destroy_cq(ep->rep_attr.recv_cq);
	if (rc)
		dprintk("RPC:       %s: ib_destroy_cq returned %i\n",
			__func__, rc);

	rpcrdma_clean_cq(ep->rep_attr.send_cq);
	rc = ib_destroy_cq(ep->rep_attr.send_cq);
	if (rc)
		dprintk("RPC:       %s: ib_destroy_cq returned %i\n",
			__func__, rc);
}
void IBCompletionQueue::close()
{
    if( _cqR )
    {
        ib_destroy_cq( _cqR, 0 );
        _cqR = 0;
    }
    
    if( _cqW )
    {
        ib_destroy_cq( _cqW, 0 );
        _cqW = 0;
    }

    if ( _cqWaitobjR )
    {
        CloseHandle( _cqWaitobjR );
        _cqWaitobjR = 0;
    }

    if ( _cqWaitobjR )
    {
        CloseHandle( _cqWaitobjW );
        _cqWaitobjW = 0;
    }
}
Exemple #4
0
/**
 * iser_create_device_ib_res - creates Protection Domain (PD), Completion
 * Queue (CQ), DMA Memory Region (DMA MR) with the device associated with
 * the adapator.
 *
 * returns 0 on success, -1 on failure
 */
static int iser_create_device_ib_res(struct iser_device *device)
{
	device->pd = ib_alloc_pd(device->ib_device);
	if (IS_ERR(device->pd))
		goto pd_err;

	device->rx_cq = ib_create_cq(device->ib_device,
				  iser_cq_callback,
				  iser_cq_event_callback,
				  (void *)device,
				  ISER_MAX_RX_CQ_LEN, 0);
	if (IS_ERR(device->rx_cq))
		goto rx_cq_err;

	device->tx_cq = ib_create_cq(device->ib_device,
				  NULL, iser_cq_event_callback,
				  (void *)device,
				  ISER_MAX_TX_CQ_LEN, 0);

	if (IS_ERR(device->tx_cq))
		goto tx_cq_err;

	if (ib_req_notify_cq(device->rx_cq, IB_CQ_NEXT_COMP))
		goto cq_arm_err;

	tasklet_init(&device->cq_tasklet,
		     iser_cq_tasklet_fn,
		     (unsigned long)device);

	device->mr = ib_get_dma_mr(device->pd, IB_ACCESS_LOCAL_WRITE |
				   IB_ACCESS_REMOTE_WRITE |
				   IB_ACCESS_REMOTE_READ);
	if (IS_ERR(device->mr))
		goto dma_mr_err;

	INIT_IB_EVENT_HANDLER(&device->event_handler, device->ib_device,
				iser_event_handler);
	if (ib_register_event_handler(&device->event_handler))
		goto handler_err;

	return 0;

handler_err:
	ib_dereg_mr(device->mr);
dma_mr_err:
	tasklet_kill(&device->cq_tasklet);
cq_arm_err:
	ib_destroy_cq(device->tx_cq);
tx_cq_err:
	ib_destroy_cq(device->rx_cq);
rx_cq_err:
	ib_dealloc_pd(device->pd);
pd_err:
	iser_err("failed to allocate an IB resource\n");
	return -1;
}
Exemple #5
0
void
sdp_tx_ring_destroy(struct sdp_sock *ssk)
{

	sdp_dbg(ssk->socket, "tx ring destroy\n");
	SDP_WLOCK(ssk);
	callout_stop(&ssk->tx_ring.timer);
	callout_stop(&ssk->nagle_timer);
	SDP_WUNLOCK(ssk);
	callout_drain(&ssk->tx_ring.timer);
	callout_drain(&ssk->nagle_timer);

	if (ssk->tx_ring.buffer) {
		sdp_tx_ring_purge(ssk);

		kfree(ssk->tx_ring.buffer);
		ssk->tx_ring.buffer = NULL;
	}

	if (ssk->tx_ring.cq) {
		if (ib_destroy_cq(ssk->tx_ring.cq)) {
			sdp_warn(ssk->socket, "destroy cq(%p) failed\n",
					ssk->tx_ring.cq);
		} else {
			ssk->tx_ring.cq = NULL;
		}
	}

	WARN_ON(ring_head(ssk->tx_ring) != ring_tail(ssk->tx_ring));
}
Exemple #6
0
void sdp_tx_ring_destroy(struct sdp_sock *ssk)
{
	del_timer_sync(&ssk->tx_ring.timer);

	if (ssk->nagle_timer.function)
		del_timer_sync(&ssk->nagle_timer);

	if (ssk->tx_ring.buffer) {
		sdp_tx_ring_purge(ssk);

		kfree(ssk->tx_ring.buffer);
		ssk->tx_ring.buffer = NULL;
	}

	if (ssk->tx_ring.cq) {
		if (ib_destroy_cq(ssk->tx_ring.cq)) {
			sdp_warn(sk_ssk(ssk), "destroy cq(%p) failed\n",
					ssk->tx_ring.cq);
		} else {
			ssk->tx_ring.cq = NULL;
		}
	}

	tasklet_kill(&ssk->tx_ring.tasklet);
	/* tx_cq is destroyed, so no more tx_irq, so no one will schedule this
	 * tasklet. */

	SDP_WARN_ON(ring_head(ssk->tx_ring) != ring_tail(ssk->tx_ring));
}
/*
 * rpcrdma_ep_destroy
 *
 * Disconnect and destroy endpoint. After this, the only
 * valid operations on the ep are to free it (if dynamically
 * allocated) or re-create it.
 *
 * The caller's error handling must be sure to not leak the endpoint
 * if this function fails.
 */
int
rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
{
	int rc;

	dprintk("RPC:       %s: entering, connected is %d\n",
		__func__, ep->rep_connected);

	if (ia->ri_id->qp) {
		rc = rpcrdma_ep_disconnect(ep, ia);
		if (rc)
			dprintk("RPC:       %s: rpcrdma_ep_disconnect"
				" returned %i\n", __func__, rc);
		rdma_destroy_qp(ia->ri_id);
		ia->ri_id->qp = NULL;
	}

	/* padding - could be done in rpcrdma_buffer_destroy... */
	if (ep->rep_pad_mr) {
		rpcrdma_deregister_internal(ia, ep->rep_pad_mr, &ep->rep_pad);
		ep->rep_pad_mr = NULL;
	}

	rpcrdma_clean_cq(ep->rep_cq);
	rc = ib_destroy_cq(ep->rep_cq);
	if (rc)
		dprintk("RPC:       %s: ib_destroy_cq returned %i\n",
			__func__, rc);

	return rc;
}
Exemple #8
0
void
sdp_rx_ring_destroy(struct sdp_sock *ssk)
{

	cancel_work_sync(&ssk->rx_comp_work);
	rx_ring_destroy_lock(&ssk->rx_ring);

	if (ssk->rx_ring.buffer) {
		sdp_rx_ring_purge(ssk);

		kfree(ssk->rx_ring.buffer);
		ssk->rx_ring.buffer = NULL;
	}

	if (ssk->rx_ring.cq) {
		if (ib_destroy_cq(ssk->rx_ring.cq)) {
			sdp_warn(ssk->socket, "destroy cq(%p) failed\n",
				ssk->rx_ring.cq);
		} else {
			ssk->rx_ring.cq = NULL;
		}
	}

	WARN_ON(ring_head(ssk->rx_ring) != ring_tail(ssk->rx_ring));
}
Exemple #9
0
/**
 * iser_free_device_ib_res - destroy/dealloc/dereg the DMA MR,
 * CQ and PD created with the device associated with the adapator.
 */
static void iser_free_device_ib_res(struct iser_device *device)
{
	BUG_ON(device->mr == NULL);

	tasklet_kill(&device->cq_tasklet);
	(void)ib_unregister_event_handler(&device->event_handler);
	(void)ib_dereg_mr(device->mr);
	(void)ib_destroy_cq(device->tx_cq);
	(void)ib_destroy_cq(device->rx_cq);
	(void)ib_dealloc_pd(device->pd);

	device->mr = NULL;
	device->tx_cq = NULL;
	device->rx_cq = NULL;
	device->pd = NULL;
}
Exemple #10
0
static void verbs_remove_device (struct ib_device *dev)
{
	printk (KERN_INFO "IB remove device called. Name = %s\n", dev->name);

	if (ah)
		ib_destroy_ah (ah);
	if (qp)
		ib_destroy_qp (qp);
	if (send_cq)
		ib_destroy_cq (send_cq);
	if (recv_cq)
		ib_destroy_cq (recv_cq);
	if (mr)
		ib_dereg_mr (mr);
	if (pd)
		ib_dealloc_pd (pd);
}
Exemple #11
0
static int get_port_caps(struct mlx5_ib_dev *dev)
{
	struct ib_device_attr *dprops = NULL;
	struct ib_port_attr *pprops = NULL;
	int err = -ENOMEM;
	int port;
	struct ib_udata uhw = {.inlen = 0, .outlen = 0};

	pprops = kmalloc(sizeof(*pprops), GFP_KERNEL);
	if (!pprops)
		goto out;

	dprops = kmalloc(sizeof(*dprops), GFP_KERNEL);
	if (!dprops)
		goto out;

	err = mlx5_ib_query_device(&dev->ib_dev, dprops, &uhw);
	if (err) {
		mlx5_ib_warn(dev, "query_device failed %d\n", err);
		goto out;
	}

	for (port = 1; port <= MLX5_CAP_GEN(dev->mdev, num_ports); port++) {
		err = mlx5_ib_query_port(&dev->ib_dev, port, pprops);
		if (err) {
			mlx5_ib_warn(dev, "query_port %d failed %d\n",
				     port, err);
			break;
		}
		dev->mdev->port_caps[port - 1].pkey_table_len =
						dprops->max_pkeys;
		dev->mdev->port_caps[port - 1].gid_table_len =
						pprops->gid_tbl_len;
		mlx5_ib_dbg(dev, "pkey_table_len %d, gid_table_len %d\n",
			    dprops->max_pkeys, pprops->gid_tbl_len);
	}

out:
	kfree(pprops);
	kfree(dprops);

	return err;
}

static void destroy_umrc_res(struct mlx5_ib_dev *dev)
{
	int err;

	err = mlx5_mr_cache_cleanup(dev);
	if (err)
		mlx5_ib_warn(dev, "mr cache cleanup failed\n");

	mlx5_ib_destroy_qp(dev->umrc.qp);
	ib_destroy_cq(dev->umrc.cq);
	ib_dealloc_pd(dev->umrc.pd);
}
ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
			     const char __user *buf, int in_len,
			     int out_len)
{
	struct ib_uverbs_destroy_cq      cmd;
	struct ib_uverbs_destroy_cq_resp resp;
	struct ib_cq               	*cq;
	struct ib_ucq_object        	*uobj;
	struct ib_uverbs_event_file	*ev_file;
	u64				 user_handle;
	int                        	 ret = -EINVAL;

	if (copy_from_user(&cmd, buf, sizeof cmd))
		return -EFAULT;

	memset(&resp, 0, sizeof resp);

	mutex_lock(&ib_uverbs_idr_mutex);

	cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
	if (!cq || cq->uobject->context != file->ucontext)
		goto out;

	user_handle = cq->uobject->user_handle;
	uobj        = container_of(cq->uobject, struct ib_ucq_object, uobject);
	ev_file     = cq->cq_context;

	ret = ib_destroy_cq(cq);
	if (ret)
		goto out;

	idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);

	mutex_lock(&file->mutex);
	list_del(&uobj->uobject.list);
	mutex_unlock(&file->mutex);

	ib_uverbs_release_ucq(file, ev_file, uobj);

	resp.comp_events_reported  = uobj->comp_events_reported;
	resp.async_events_reported = uobj->async_events_reported;

	kfree(uobj);

	if (copy_to_user((void __user *) (unsigned long) cmd.response,
			 &resp, sizeof resp))
		ret = -EFAULT;

out:
	mutex_unlock(&ib_uverbs_idr_mutex);

	return ret ? ret : in_len;
}
Exemple #13
0
/**
 * Shut down CMRC connection gracefully
 *
 * @v cmrc		Communication-Managed Reliable Connection
 *
 * The Infiniband data structures are not reference-counted or
 * guarded.  It is therefore unsafe to shut them down while we may be
 * in the middle of a callback from the Infiniband stack (e.g. in a
 * receive completion handler).
 *
 * This shutdown process will run some time after the call to
 * ib_cmrc_close(), after control has returned out of the Infiniband
 * core, and will shut down the Infiniband interfaces cleanly.
 *
 * The shutdown process holds an implicit reference on the CMRC
 * connection, ensuring that the structure is not freed before the
 * shutdown process has run.
 */
static void ib_cmrc_shutdown ( struct ib_cmrc_connection *cmrc ) {

	DBGC ( cmrc, "CMRC %p shutting down\n", cmrc );

	/* Shut down Infiniband interface */
	ib_destroy_conn ( cmrc->ibdev, cmrc->qp, cmrc->conn );
	ib_destroy_qp ( cmrc->ibdev, cmrc->qp );
	ib_destroy_cq ( cmrc->ibdev, cmrc->cq );
	ib_close ( cmrc->ibdev );

	/* Drop the remaining reference */
	ref_put ( &cmrc->refcnt );
}
Exemple #14
0
static void isert_device_release(struct isert_device *isert_dev)
{
	int err, i;

	TRACE_ENTRY();

	lockdep_assert_held(&dev_list_mutex);

	isert_dev_list_remove(isert_dev); /* remove from global list */

	for (i = 0; i < isert_dev->num_cqs; ++i) {
		struct isert_cq *cq_desc = &isert_dev->cq_desc[i];

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
		/*
		 * cancel_work_sync() was introduced in 2.6.22. We can
		 * only wait until all scheduled work is done.
		 */
		flush_workqueue(cq_desc->cq_workqueue);
#else
		cancel_work_sync(&cq_desc->cq_comp_work);
#endif

		err = ib_destroy_cq(cq_desc->cq);
		if (unlikely(err))
			pr_err("Failed to destroy cq, err:%d\n", err);

		destroy_workqueue(cq_desc->cq_workqueue);
	}

	err = ib_dereg_mr(isert_dev->mr);
	if (unlikely(err))
		pr_err("Failed to destroy mr, err:%d\n", err);
	err = ib_dealloc_pd(isert_dev->pd);
	if (unlikely(err))
		pr_err("Failed to destroy pd, err:%d\n", err);

	vfree(isert_dev->cq_desc);
	isert_dev->cq_desc = NULL;

	kfree(isert_dev->cq_qps);
	isert_dev->cq_qps = NULL;

	kfree(isert_dev);

	TRACE_EXIT();
}
Exemple #15
0
static void rdma_destroy_trans(struct p9_trans_rdma *rdma)
{
	if (!rdma)
		return;

	if (rdma->qp && !IS_ERR(rdma->qp))
		ib_destroy_qp(rdma->qp);

	if (rdma->pd && !IS_ERR(rdma->pd))
		ib_dealloc_pd(rdma->pd);

	if (rdma->cq && !IS_ERR(rdma->cq))
		ib_destroy_cq(rdma->cq);

	if (rdma->cm_id && !IS_ERR(rdma->cm_id))
		rdma_destroy_id(rdma->cm_id);

	kfree(rdma);
}
Exemple #16
0
static int krping_setup_qp(struct krping_cb *cb, struct rdma_cm_id *cm_id)
{
	int ret;
	cb->pd = ib_alloc_pd(cm_id->device);
	if (IS_ERR(cb->pd)) {
		log(LOG_ERR, "ib_alloc_pd failed\n");
		return PTR_ERR(cb->pd);
	}
	DEBUG_LOG(PFX "created pd %p\n", cb->pd);

	cb->cq = ib_create_cq(cm_id->device, krping_cq_event_handler, NULL,
			      cb, cb->txdepth * 2, 0);
	if (IS_ERR(cb->cq)) {
		log(LOG_ERR, "ib_create_cq failed\n");
		ret = PTR_ERR(cb->cq);
		goto err1;
	}
	DEBUG_LOG(PFX "created cq %p\n", cb->cq);

	if (!cb->wlat && !cb->rlat && !cb->bw) {
		ret = ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP);
		if (ret) {
			log(LOG_ERR, "ib_create_cq failed\n");
			goto err2;
		}
	}

	ret = krping_create_qp(cb);
	if (ret) {
		log(LOG_ERR, "krping_create_qp failed: %d\n", ret);
		goto err2;
	}
	DEBUG_LOG(PFX "created qp %p\n", cb->qp);
	return 0;
err2:
	ib_destroy_cq(cb->cq);
err1:
	ib_dealloc_pd(cb->pd);
	return ret;
}
ib_cq_handle_t IBCompletionQueue::_createReadBack( 
                                    const IBAdapter*     adapter, 
                                    const uint32_t size)
{
    // build a completion queue for send part
    ib_cq_create_t    cqCreate;
    cqCreate.h_wait_obj  = 0;
    cqCreate.pfn_comp_cb = pp_cq_comp_cb;
    cqCreate.size        = size;

    ib_cq_handle_t _cq;
    // Creates a completion queue
    ib_api_status_t ibStatus = ib_create_cq( adapter->getHandle(), 
                                             &cqCreate, this, 0, &_cq);
    if( ibStatus )
    {
        EQERROR << "Can't create CQ" << std::endl;
        ib_destroy_cq( _cq, 0 );
        return 0;
    }
    return _cq;
}
Exemple #18
0
/*
 * Create a QP
 */
static int rds_iw_init_qp_attrs(struct ib_qp_init_attr *attr,
		struct rds_iw_device *rds_iwdev,
		struct rds_iw_work_ring *send_ring,
		void (*send_cq_handler)(struct ib_cq *, void *),
		struct rds_iw_work_ring *recv_ring,
		void (*recv_cq_handler)(struct ib_cq *, void *),
		void *context)
{
	struct ib_device *dev = rds_iwdev->dev;
	unsigned int send_size, recv_size;
	int ret;

	/* The offset of 1 is to accommodate the additional ACK WR. */
	send_size = min_t(unsigned int, rds_iwdev->max_wrs, rds_iw_sysctl_max_send_wr + 1);
	recv_size = min_t(unsigned int, rds_iwdev->max_wrs, rds_iw_sysctl_max_recv_wr + 1);
	rds_iw_ring_resize(send_ring, send_size - 1);
	rds_iw_ring_resize(recv_ring, recv_size - 1);

	memset(attr, 0, sizeof(*attr));
	attr->event_handler = rds_iw_qp_event_handler;
	attr->qp_context = context;
	attr->cap.max_send_wr = send_size;
	attr->cap.max_recv_wr = recv_size;
	attr->cap.max_send_sge = rds_iwdev->max_sge;
	attr->cap.max_recv_sge = RDS_IW_RECV_SGE;
	attr->sq_sig_type = IB_SIGNAL_REQ_WR;
	attr->qp_type = IB_QPT_RC;

	attr->send_cq = ib_create_cq(dev, send_cq_handler,
				     rds_iw_cq_event_handler,
				     context, send_size, 0);
	if (IS_ERR(attr->send_cq)) {
		ret = PTR_ERR(attr->send_cq);
		attr->send_cq = NULL;
		rdsdebug("ib_create_cq send failed: %d\n", ret);
		goto out;
	}

	attr->recv_cq = ib_create_cq(dev, recv_cq_handler,
				     rds_iw_cq_event_handler,
				     context, recv_size, 0);
	if (IS_ERR(attr->recv_cq)) {
		ret = PTR_ERR(attr->recv_cq);
		attr->recv_cq = NULL;
		rdsdebug("ib_create_cq send failed: %d\n", ret);
		goto out;
	}

	ret = ib_req_notify_cq(attr->send_cq, IB_CQ_NEXT_COMP);
	if (ret) {
		rdsdebug("ib_req_notify_cq send failed: %d\n", ret);
		goto out;
	}

	ret = ib_req_notify_cq(attr->recv_cq, IB_CQ_SOLICITED);
	if (ret) {
		rdsdebug("ib_req_notify_cq recv failed: %d\n", ret);
		goto out;
	}

out:
	if (ret) {
		if (attr->send_cq)
			ib_destroy_cq(attr->send_cq);
		if (attr->recv_cq)
			ib_destroy_cq(attr->recv_cq);
	}
	return ret;
}
Exemple #19
0
/* A vanilla 2.6.19 or older kernel without backported OFED kernel headers. */
static void isert_cq_comp_work_cb(void *ctx)
{
	struct isert_cq *cq_desc = ctx;
#else
static void isert_cq_comp_work_cb(struct work_struct *work)
{
	struct isert_cq *cq_desc =
		container_of(work, struct isert_cq, cq_comp_work);
#endif
	int ret;

	TRACE_ENTRY();

	ret = isert_poll_cq(cq_desc);
	if (unlikely(ret < 0)) { /* poll error */
		pr_err("ib_poll_cq failed\n");
		goto out;
	}

	ib_req_notify_cq(cq_desc->cq,
			 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
	/*
	 * not all HCAs support IB_CQ_REPORT_MISSED_EVENTS,
	 * so we need to make sure we don't miss any events between
	 * last call to ib_poll_cq() and ib_req_notify_cq()
	 */
	isert_poll_cq(cq_desc);

out:
	TRACE_EXIT();
	return;
}

static void isert_cq_comp_handler(struct ib_cq *cq, void *context)
{
	struct isert_cq *cq_desc = context;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
	queue_work(cq_desc->cq_workqueue, &cq_desc->cq_comp_work);
#else
	queue_work_on(smp_processor_id(), cq_desc->cq_workqueue,
		      &cq_desc->cq_comp_work);
#endif
}

static const char *ib_event_type_str(enum ib_event_type ev_type)
{
	switch (ev_type) {
	case IB_EVENT_COMM_EST:
		return "COMM_EST";
	case IB_EVENT_QP_FATAL:
		return "QP_FATAL";
	case IB_EVENT_QP_REQ_ERR:
		return "QP_REQ_ERR";
	case IB_EVENT_QP_ACCESS_ERR:
		return "QP_ACCESS_ERR";
	case IB_EVENT_SQ_DRAINED:
		return "SQ_DRAINED";
	case IB_EVENT_PATH_MIG:
		return "PATH_MIG";
	case IB_EVENT_PATH_MIG_ERR:
		return "PATH_MIG_ERR";
	case IB_EVENT_QP_LAST_WQE_REACHED:
		return "QP_LAST_WQE_REACHED";
	case IB_EVENT_CQ_ERR:
		return "CQ_ERR";
	case IB_EVENT_SRQ_ERR:
		return "SRQ_ERR";
	case IB_EVENT_SRQ_LIMIT_REACHED:
		return "SRQ_LIMIT_REACHED";
	case IB_EVENT_PORT_ACTIVE:
		return "PORT_ACTIVE";
	case IB_EVENT_PORT_ERR:
		return "PORT_ERR";
	case IB_EVENT_LID_CHANGE:
		return "LID_CHANGE";
	case IB_EVENT_PKEY_CHANGE:
		return "PKEY_CHANGE";
	case IB_EVENT_SM_CHANGE:
		return "SM_CHANGE";
	case IB_EVENT_CLIENT_REREGISTER:
		return "CLIENT_REREGISTER";
	case IB_EVENT_DEVICE_FATAL:
		return "DEVICE_FATAL";
	default:
		return "UNKNOWN";
	}
}

static void isert_async_evt_handler(struct ib_event *async_ev, void *context)
{
	struct isert_cq *cq = context;
	struct isert_device *isert_dev = cq->dev;
	struct ib_device *ib_dev = isert_dev->ib_dev;
	char *dev_name = ib_dev->name;
	enum ib_event_type ev_type = async_ev->event;
	struct isert_connection *isert_conn;

	TRACE_ENTRY();

	switch (ev_type) {
	case IB_EVENT_COMM_EST:
		isert_conn = async_ev->element.qp->qp_context;
		pr_info("conn:0x%p cm_id:0x%p dev:%s, QP evt: %s\n",
			isert_conn, isert_conn->cm_id, dev_name,
			ib_event_type_str(IB_EVENT_COMM_EST));
		/* force "connection established" event */
		rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST);
		break;

	/* rest of QP-related events */
	case IB_EVENT_QP_FATAL:
	case IB_EVENT_QP_REQ_ERR:
	case IB_EVENT_QP_ACCESS_ERR:
	case IB_EVENT_SQ_DRAINED:
	case IB_EVENT_PATH_MIG:
	case IB_EVENT_PATH_MIG_ERR:
	case IB_EVENT_QP_LAST_WQE_REACHED:
		isert_conn = async_ev->element.qp->qp_context;
		pr_err("conn:0x%p cm_id:0x%p dev:%s, QP evt: %s\n",
		       isert_conn, isert_conn->cm_id, dev_name,
		       ib_event_type_str(ev_type));
		break;

	/* CQ-related events */
	case IB_EVENT_CQ_ERR:
		pr_err("dev:%s CQ evt: %s\n", dev_name,
		       ib_event_type_str(ev_type));
		break;

	/* SRQ events */
	case IB_EVENT_SRQ_ERR:
	case IB_EVENT_SRQ_LIMIT_REACHED:
		pr_err("dev:%s SRQ evt: %s\n", dev_name,
		       ib_event_type_str(ev_type));
		break;

	/* Port events */
	case IB_EVENT_PORT_ACTIVE:
	case IB_EVENT_PORT_ERR:
	case IB_EVENT_LID_CHANGE:
	case IB_EVENT_PKEY_CHANGE:
	case IB_EVENT_SM_CHANGE:
	case IB_EVENT_CLIENT_REREGISTER:
		pr_err("dev:%s port:%d evt: %s\n",
		       dev_name, async_ev->element.port_num,
		       ib_event_type_str(ev_type));
		break;

	/* HCA events */
	case IB_EVENT_DEVICE_FATAL:
		pr_err("dev:%s HCA evt: %s\n", dev_name,
		       ib_event_type_str(ev_type));
		break;

	default:
		pr_err("dev:%s evt: %s\n", dev_name,
		       ib_event_type_str(ev_type));
		break;
	}

	TRACE_EXIT();
}

static struct isert_device *isert_device_create(struct ib_device *ib_dev)
{
	struct isert_device *isert_dev;
	struct ib_device_attr *dev_attr;
	int cqe_num, err;
	struct ib_pd *pd;
	struct ib_mr *mr;
	struct ib_cq *cq;
	char wq_name[64];
	int i, j;

	TRACE_ENTRY();

	isert_dev = kzalloc(sizeof(*isert_dev), GFP_KERNEL);
	if (unlikely(isert_dev == NULL)) {
		pr_err("Failed to allocate iser dev\n");
		err = -ENOMEM;
		goto out;
	}

	dev_attr = &isert_dev->device_attr;
	err = ib_query_device(ib_dev, dev_attr);
	if (unlikely(err)) {
		pr_err("Failed to query device, err: %d\n", err);
		goto fail_query;
	}

	isert_dev->num_cqs = min_t(int, num_online_cpus(),
				   ib_dev->num_comp_vectors);

	isert_dev->cq_qps = kzalloc(sizeof(*isert_dev->cq_qps) * isert_dev->num_cqs,
				    GFP_KERNEL);
	if (unlikely(isert_dev->cq_qps == NULL)) {
		pr_err("Failed to allocate iser cq_qps\n");
		err = -ENOMEM;
		goto fail_cq_qps;
	}

	isert_dev->cq_desc = vmalloc(sizeof(*isert_dev->cq_desc) * isert_dev->num_cqs);
	if (unlikely(isert_dev->cq_desc == NULL)) {
		pr_err("Failed to allocate %ld bytes for iser cq_desc\n",
		       sizeof(*isert_dev->cq_desc) * isert_dev->num_cqs);
		err = -ENOMEM;
		goto fail_alloc_cq_desc;
	}

	pd = ib_alloc_pd(ib_dev);
	if (unlikely(IS_ERR(pd))) {
		err = PTR_ERR(pd);
		pr_err("Failed to alloc iser dev pd, err:%d\n", err);
		goto fail_pd;
	}

	mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE);
	if (unlikely(IS_ERR(mr))) {
		err = PTR_ERR(mr);
		pr_err("Failed to get dma mr, err: %d\n", err);
		goto fail_mr;
	}

	cqe_num = min(isert_dev->device_attr.max_cqe, ISER_CQ_ENTRIES);
	cqe_num = cqe_num / isert_dev->num_cqs;

#ifdef CONFIG_SCST_EXTRACHECKS
	if (isert_dev->device_attr.max_cqe == 0)
		pr_err("Zero max_cqe encountered: you may have a compilation problem\n");
#endif

	for (i = 0; i < isert_dev->num_cqs; ++i) {
		struct isert_cq *cq_desc = &isert_dev->cq_desc[i];

		cq_desc->dev = isert_dev;
		cq_desc->idx = i;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
		INIT_WORK(&cq_desc->cq_comp_work, isert_cq_comp_work_cb, NULL);
#else
		INIT_WORK(&cq_desc->cq_comp_work, isert_cq_comp_work_cb);
#endif

		snprintf(wq_name, sizeof(wq_name), "isert_cq_%p", cq_desc);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
		cq_desc->cq_workqueue = create_singlethread_workqueue(wq_name);
#else
#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 36)
		cq_desc->cq_workqueue = alloc_workqueue(wq_name,
							WQ_CPU_INTENSIVE|
							WQ_RESCUER, 1);
#else
		cq_desc->cq_workqueue = alloc_workqueue(wq_name,
							WQ_CPU_INTENSIVE|
							WQ_MEM_RECLAIM, 1);
#endif
#endif
		if (unlikely(!cq_desc->cq_workqueue)) {
			pr_err("Failed to alloc iser cq work queue for dev:%s\n",
			       ib_dev->name);
			err = -ENOMEM;
			goto fail_cq;
		}

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
		cq = ib_create_cq(ib_dev,
				  isert_cq_comp_handler,
				  isert_async_evt_handler,
				  cq_desc, /* context */
				  cqe_num,
				  i); /* completion vector */
#else
		{
		struct ib_cq_init_attr ia = {
			.cqe		 = cqe_num,
			.comp_vector	 = i,
		};
		cq = ib_create_cq(ib_dev,
				  isert_cq_comp_handler,
				  isert_async_evt_handler,
				  cq_desc, /* context */
				  &ia);
		}
#endif
		if (unlikely(IS_ERR(cq))) {
			cq_desc->cq = NULL;
			err = PTR_ERR(cq);
			pr_err("Failed to create iser dev cq, err:%d\n", err);
			goto fail_cq;
		}

		cq_desc->cq = cq;
		err = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
		if (unlikely(err)) {
			pr_err("Failed to request notify cq, err: %d\n", err);
			goto fail_cq;
		}
	}

	isert_dev->ib_dev = ib_dev;
	isert_dev->pd = pd;
	isert_dev->mr = mr;

	INIT_LIST_HEAD(&isert_dev->conn_list);

	lockdep_assert_held(&dev_list_mutex);

	isert_dev_list_add(isert_dev);

	pr_info("iser created device:%p\n", isert_dev);
	return isert_dev;

fail_cq:
	for (j = 0; j <= i; ++j) {
		if (isert_dev->cq_desc[j].cq)
			ib_destroy_cq(isert_dev->cq_desc[j].cq);
		if (isert_dev->cq_desc[j].cq_workqueue)
			destroy_workqueue(isert_dev->cq_desc[j].cq_workqueue);
	}
	ib_dereg_mr(mr);
fail_mr:
	ib_dealloc_pd(pd);
fail_pd:
	vfree(isert_dev->cq_desc);
fail_alloc_cq_desc:
	kfree(isert_dev->cq_qps);
fail_cq_qps:
fail_query:
	kfree(isert_dev);
out:
	TRACE_EXIT_RES(err);
	return ERR_PTR(err);
}

static void isert_device_release(struct isert_device *isert_dev)
{
	int err, i;

	TRACE_ENTRY();

	lockdep_assert_held(&dev_list_mutex);

	isert_dev_list_remove(isert_dev); /* remove from global list */

	for (i = 0; i < isert_dev->num_cqs; ++i) {
		struct isert_cq *cq_desc = &isert_dev->cq_desc[i];

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
		/*
		 * cancel_work_sync() was introduced in 2.6.22. We can
		 * only wait until all scheduled work is done.
		 */
		flush_workqueue(cq_desc->cq_workqueue);
#else
		cancel_work_sync(&cq_desc->cq_comp_work);
#endif

		err = ib_destroy_cq(cq_desc->cq);
		if (unlikely(err))
			pr_err("Failed to destroy cq, err:%d\n", err);

		destroy_workqueue(cq_desc->cq_workqueue);
	}

	err = ib_dereg_mr(isert_dev->mr);
	if (unlikely(err))
		pr_err("Failed to destroy mr, err:%d\n", err);
	err = ib_dealloc_pd(isert_dev->pd);
	if (unlikely(err))
		pr_err("Failed to destroy pd, err:%d\n", err);

	vfree(isert_dev->cq_desc);
	isert_dev->cq_desc = NULL;

	kfree(isert_dev->cq_qps);
	isert_dev->cq_qps = NULL;

	kfree(isert_dev);

	TRACE_EXIT();
}
Exemple #20
0
/*
 * This needs to be very careful to not leave IS_ERR pointers around for
 * cleanup to trip over.
 */
static int
rdsv3_ib_setup_qp(struct rdsv3_connection *conn)
{
	struct rdsv3_ib_connection *ic = conn->c_transport_data;
	struct ib_device *dev = ic->i_cm_id->device;
	struct ib_qp_init_attr attr;
	struct rdsv3_ib_device *rds_ibdev;
	ibt_send_wr_t *wrp;
	ibt_wr_ds_t *sgl;
	int ret, i;

	RDSV3_DPRINTF2("rdsv3_ib_setup_qp", "Enter conn: %p", conn);

	/*
	 * rdsv3_ib_add_one creates a rdsv3_ib_device object per IB device,
	 * and allocates a protection domain, memory range and FMR pool
	 * for each.  If that fails for any reason, it will not register
	 * the rds_ibdev at all.
	 */
	rds_ibdev = ib_get_client_data(dev, &rdsv3_ib_client);
	if (!rds_ibdev) {
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "RDS/IB: No client_data for device %s", dev->name);
		return (-EOPNOTSUPP);
	}
	ic->rds_ibdev = rds_ibdev;

	if (rds_ibdev->max_wrs < ic->i_send_ring.w_nr + 1)
		rdsv3_ib_ring_resize(&ic->i_send_ring, rds_ibdev->max_wrs - 1);
	if (rds_ibdev->max_wrs < ic->i_recv_ring.w_nr + 1)
		rdsv3_ib_ring_resize(&ic->i_recv_ring, rds_ibdev->max_wrs - 1);

	/* Protection domain and memory range */
	ic->i_pd = rds_ibdev->pd;

	/*
	 * IB_CQ_VECTOR_LEAST_ATTACHED and/or the corresponding feature is
	 * not implmeneted in Hermon yet, but we can pass it to ib_create_cq()
	 * anyway.
	 */
	ic->i_cq = ib_create_cq(dev, rdsv3_ib_cq_comp_handler,
	    rdsv3_ib_cq_event_handler, conn,
	    ic->i_recv_ring.w_nr + ic->i_send_ring.w_nr + 1,
	    rdsv3_af_grp_get_sched(ic->rds_ibdev->aft_hcagp));
	if (IS_ERR(ic->i_cq)) {
		ret = PTR_ERR(ic->i_cq);
		ic->i_cq = NULL;
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "ib_create_cq failed: %d", ret);
		goto out;
	}
	if (rdsv3_enable_snd_cq) {
		ic->i_snd_cq = ib_create_cq(dev, rdsv3_ib_snd_cq_comp_handler,
		    rdsv3_ib_cq_event_handler, conn, ic->i_send_ring.w_nr + 1,
		    rdsv3_af_grp_get_sched(ic->rds_ibdev->aft_hcagp));
		if (IS_ERR(ic->i_snd_cq)) {
			ret = PTR_ERR(ic->i_snd_cq);
			(void) ib_destroy_cq(ic->i_cq);
			ic->i_cq = NULL;
			ic->i_snd_cq = NULL;
			RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
			    "ib_create_cq send cq failed: %d", ret);
			goto out;
		}
	}

	/* XXX negotiate max send/recv with remote? */
	(void) memset(&attr, 0, sizeof (attr));
	attr.event_handler = rdsv3_ib_qp_event_handler;
	attr.qp_context = conn;
	/* + 1 to allow for the single ack message */
	attr.cap.max_send_wr = ic->i_send_ring.w_nr + 1;
	attr.cap.max_recv_wr = ic->i_recv_ring.w_nr + 1;
	attr.cap.max_send_sge = rds_ibdev->max_sge;
	attr.cap.max_recv_sge = RDSV3_IB_RECV_SGE;
	attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	attr.qp_type = IB_QPT_RC;
	if (rdsv3_enable_snd_cq) {
		attr.send_cq = ic->i_snd_cq;
	} else {
		attr.send_cq = ic->i_cq;
	}
	attr.recv_cq = ic->i_cq;

	/*
	 * XXX this can fail if max_*_wr is too large?  Are we supposed
	 * to back off until we get a value that the hardware can support?
	 */
	ret = rdma_create_qp(ic->i_cm_id, ic->i_pd, &attr);
	if (ret) {
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "rdma_create_qp failed: %d", ret);
		goto out;
	}

	ret = rdsv3_ib_alloc_hdrs(dev, ic);
	if (ret != 0) {
		ret = -ENOMEM;
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "rdsv3_ib_alloc_hdrs failed: %d", ret);
		goto out;
	}

	ic->i_sends = kmem_alloc(ic->i_send_ring.w_nr *
	    sizeof (struct rdsv3_ib_send_work), KM_NOSLEEP);
	if (ic->i_sends == NULL) {
		ret = -ENOMEM;
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "send allocation failed: %d", ret);
		goto out;
	}
	(void) memset(ic->i_sends, 0, ic->i_send_ring.w_nr *
	    sizeof (struct rdsv3_ib_send_work));

	ic->i_send_wrs =
	    kmem_alloc(ic->i_send_ring.w_nr * (sizeof (ibt_send_wr_t) +
	    RDSV3_IB_MAX_SGE * sizeof (ibt_wr_ds_t)), KM_NOSLEEP);
	if (ic->i_send_wrs == NULL) {
		ret = -ENOMEM;
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "Send WR allocation failed: %d", ret);
		goto out;
	}
	sgl = (ibt_wr_ds_t *)((uint8_t *)ic->i_send_wrs +
	    (ic->i_send_ring.w_nr * sizeof (ibt_send_wr_t)));
	for (i = 0; i < ic->i_send_ring.w_nr; i++) {
		wrp = &ic->i_send_wrs[i];
		wrp->wr_sgl = &sgl[i * RDSV3_IB_MAX_SGE];
	}

	ic->i_recvs = kmem_alloc(ic->i_recv_ring.w_nr *
	    sizeof (struct rdsv3_ib_recv_work), KM_NOSLEEP);
	if (ic->i_recvs == NULL) {
		ret = -ENOMEM;
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "recv allocation failed: %d", ret);
		goto out;
	}
	(void) memset(ic->i_recvs, 0, ic->i_recv_ring.w_nr *
	    sizeof (struct rdsv3_ib_recv_work));

	ic->i_recv_wrs =
	    kmem_alloc(ic->i_recv_ring.w_nr * sizeof (ibt_recv_wr_t),
	    KM_NOSLEEP);
	if (ic->i_recv_wrs == NULL) {
		ret = -ENOMEM;
		RDSV3_DPRINTF2("rdsv3_ib_setup_qp",
		    "Recv WR allocation failed: %d", ret);
		goto out;
	}

	rdsv3_ib_recv_init_ack(ic);

	RDSV3_DPRINTF2("rdsv3_ib_setup_qp", "conn %p pd %p mr %p cq %p",
	    conn, ic->i_pd, ic->i_mr, ic->i_cq);

out:
	return (ret);
}
Exemple #21
0
static struct isert_device *isert_device_create(struct ib_device *ib_dev)
{
	struct isert_device *isert_dev;
	struct ib_device_attr *dev_attr;
	int cqe_num, err;
	struct ib_pd *pd;
	struct ib_mr *mr;
	struct ib_cq *cq;
	char wq_name[64];
	int i, j;

	TRACE_ENTRY();

	isert_dev = kzalloc(sizeof(*isert_dev), GFP_KERNEL);
	if (unlikely(isert_dev == NULL)) {
		pr_err("Failed to allocate iser dev\n");
		err = -ENOMEM;
		goto out;
	}

	dev_attr = &isert_dev->device_attr;
	err = ib_query_device(ib_dev, dev_attr);
	if (unlikely(err)) {
		pr_err("Failed to query device, err: %d\n", err);
		goto fail_query;
	}

	isert_dev->num_cqs = min_t(int, num_online_cpus(),
				   ib_dev->num_comp_vectors);

	isert_dev->cq_qps = kzalloc(sizeof(*isert_dev->cq_qps) * isert_dev->num_cqs,
				    GFP_KERNEL);
	if (unlikely(isert_dev->cq_qps == NULL)) {
		pr_err("Failed to allocate iser cq_qps\n");
		err = -ENOMEM;
		goto fail_cq_qps;
	}

	isert_dev->cq_desc = vmalloc(sizeof(*isert_dev->cq_desc) * isert_dev->num_cqs);
	if (unlikely(isert_dev->cq_desc == NULL)) {
		pr_err("Failed to allocate %ld bytes for iser cq_desc\n",
		       sizeof(*isert_dev->cq_desc) * isert_dev->num_cqs);
		err = -ENOMEM;
		goto fail_alloc_cq_desc;
	}

	pd = ib_alloc_pd(ib_dev);
	if (unlikely(IS_ERR(pd))) {
		err = PTR_ERR(pd);
		pr_err("Failed to alloc iser dev pd, err:%d\n", err);
		goto fail_pd;
	}

	mr = ib_get_dma_mr(pd, IB_ACCESS_LOCAL_WRITE);
	if (unlikely(IS_ERR(mr))) {
		err = PTR_ERR(mr);
		pr_err("Failed to get dma mr, err: %d\n", err);
		goto fail_mr;
	}

	cqe_num = min(isert_dev->device_attr.max_cqe, ISER_CQ_ENTRIES);
	cqe_num = cqe_num / isert_dev->num_cqs;

#ifdef CONFIG_SCST_EXTRACHECKS
	if (isert_dev->device_attr.max_cqe == 0)
		pr_err("Zero max_cqe encountered: you may have a compilation problem\n");
#endif

	for (i = 0; i < isert_dev->num_cqs; ++i) {
		struct isert_cq *cq_desc = &isert_dev->cq_desc[i];

		cq_desc->dev = isert_dev;
		cq_desc->idx = i;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
		INIT_WORK(&cq_desc->cq_comp_work, isert_cq_comp_work_cb, NULL);
#else
		INIT_WORK(&cq_desc->cq_comp_work, isert_cq_comp_work_cb);
#endif

		snprintf(wq_name, sizeof(wq_name), "isert_cq_%p", cq_desc);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
		cq_desc->cq_workqueue = create_singlethread_workqueue(wq_name);
#else
#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 36)
		cq_desc->cq_workqueue = alloc_workqueue(wq_name,
							WQ_CPU_INTENSIVE|
							WQ_RESCUER, 1);
#else
		cq_desc->cq_workqueue = alloc_workqueue(wq_name,
							WQ_CPU_INTENSIVE|
							WQ_MEM_RECLAIM, 1);
#endif
#endif
		if (unlikely(!cq_desc->cq_workqueue)) {
			pr_err("Failed to alloc iser cq work queue for dev:%s\n",
			       ib_dev->name);
			err = -ENOMEM;
			goto fail_cq;
		}

		cq = ib_create_cq(ib_dev,
				  isert_cq_comp_handler,
				  isert_async_evt_handler,
				  cq_desc, /* context */
				  cqe_num,
				  i); /* completion vector */
		if (unlikely(IS_ERR(cq))) {
			cq_desc->cq = NULL;
			err = PTR_ERR(cq);
			pr_err("Failed to create iser dev cq, err:%d\n", err);
			goto fail_cq;
		}

		cq_desc->cq = cq;
		err = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
		if (unlikely(err)) {
			pr_err("Failed to request notify cq, err: %d\n", err);
			goto fail_cq;
		}
	}

	isert_dev->ib_dev = ib_dev;
	isert_dev->pd = pd;
	isert_dev->mr = mr;

	INIT_LIST_HEAD(&isert_dev->conn_list);

	lockdep_assert_held(&dev_list_mutex);

	isert_dev_list_add(isert_dev);

	pr_info("iser created device:%p\n", isert_dev);
	return isert_dev;

fail_cq:
	for (j = 0; j <= i; ++j) {
		if (isert_dev->cq_desc[j].cq)
			ib_destroy_cq(isert_dev->cq_desc[j].cq);
		if (isert_dev->cq_desc[j].cq_workqueue)
			destroy_workqueue(isert_dev->cq_desc[j].cq_workqueue);
	}
	ib_dereg_mr(mr);
fail_mr:
	ib_dealloc_pd(pd);
fail_pd:
	vfree(isert_dev->cq_desc);
fail_alloc_cq_desc:
	kfree(isert_dev->cq_qps);
fail_cq_qps:
fail_query:
	kfree(isert_dev);
out:
	TRACE_EXIT_RES(err);
	return ERR_PTR(err);
}
/*
 * Create unconnected endpoint.
 */
int
rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
				struct rpcrdma_create_data_internal *cdata)
{
	struct ib_device_attr devattr;
	int rc, err;

	rc = ib_query_device(ia->ri_id->device, &devattr);
	if (rc) {
		dprintk("RPC:       %s: ib_query_device failed %d\n",
			__func__, rc);
		return rc;
	}

	/* check provider's send/recv wr limits */
	if (cdata->max_requests > devattr.max_qp_wr)
		cdata->max_requests = devattr.max_qp_wr;

	ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall;
	ep->rep_attr.qp_context = ep;
	/* send_cq and recv_cq initialized below */
	ep->rep_attr.srq = NULL;
	ep->rep_attr.cap.max_send_wr = cdata->max_requests;
	switch (ia->ri_memreg_strategy) {
	case RPCRDMA_FRMR:
		/* Add room for frmr register and invalidate WRs */
		ep->rep_attr.cap.max_send_wr *= 3;
		if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr)
			return -EINVAL;
		break;
	case RPCRDMA_MEMWINDOWS_ASYNC:
	case RPCRDMA_MEMWINDOWS:
		/* Add room for mw_binds+unbinds - overkill! */
		ep->rep_attr.cap.max_send_wr++;
		ep->rep_attr.cap.max_send_wr *= (2 * RPCRDMA_MAX_SEGS);
		if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr)
			return -EINVAL;
		break;
	default:
		break;
	}
	ep->rep_attr.cap.max_recv_wr = cdata->max_requests;
	ep->rep_attr.cap.max_send_sge = (cdata->padding ? 4 : 2);
	ep->rep_attr.cap.max_recv_sge = 1;
	ep->rep_attr.cap.max_inline_data = 0;
	ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	ep->rep_attr.qp_type = IB_QPT_RC;
	ep->rep_attr.port_num = ~0;

	dprintk("RPC:       %s: requested max: dtos: send %d recv %d; "
		"iovs: send %d recv %d\n",
		__func__,
		ep->rep_attr.cap.max_send_wr,
		ep->rep_attr.cap.max_recv_wr,
		ep->rep_attr.cap.max_send_sge,
		ep->rep_attr.cap.max_recv_sge);

	/* set trigger for requesting send completion */
	ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 /*  - 1*/;
	switch (ia->ri_memreg_strategy) {
	case RPCRDMA_MEMWINDOWS_ASYNC:
	case RPCRDMA_MEMWINDOWS:
		ep->rep_cqinit -= RPCRDMA_MAX_SEGS;
		break;
	default:
		break;
	}
	if (ep->rep_cqinit <= 2)
		ep->rep_cqinit = 0;
	INIT_CQCOUNT(ep);
	ep->rep_ia = ia;
	init_waitqueue_head(&ep->rep_connect_wait);

	/*
	 * Create a single cq for receive dto and mw_bind (only ever
	 * care about unbind, really). Send completions are suppressed.
	 * Use single threaded tasklet upcalls to maintain ordering.
	 */
	ep->rep_cq = ib_create_cq(ia->ri_id->device, rpcrdma_cq_event_upcall,
				  rpcrdma_cq_async_error_upcall, NULL,
				  ep->rep_attr.cap.max_recv_wr +
				  ep->rep_attr.cap.max_send_wr + 1, 0);
	if (IS_ERR(ep->rep_cq)) {
		rc = PTR_ERR(ep->rep_cq);
		dprintk("RPC:       %s: ib_create_cq failed: %i\n",
			__func__, rc);
		goto out1;
	}

	rc = ib_req_notify_cq(ep->rep_cq, IB_CQ_NEXT_COMP);
	if (rc) {
		dprintk("RPC:       %s: ib_req_notify_cq failed: %i\n",
			__func__, rc);
		goto out2;
	}

	ep->rep_attr.send_cq = ep->rep_cq;
	ep->rep_attr.recv_cq = ep->rep_cq;

	/* Initialize cma parameters */

	/* RPC/RDMA does not use private data */
	ep->rep_remote_cma.private_data = NULL;
	ep->rep_remote_cma.private_data_len = 0;

	/* Client offers RDMA Read but does not initiate */
	ep->rep_remote_cma.initiator_depth = 0;
	if (ia->ri_memreg_strategy == RPCRDMA_BOUNCEBUFFERS)
		ep->rep_remote_cma.responder_resources = 0;
	else if (devattr.max_qp_rd_atom > 32)	/* arbitrary but <= 255 */
		ep->rep_remote_cma.responder_resources = 32;
	else
		ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom;

	ep->rep_remote_cma.retry_count = 7;
	ep->rep_remote_cma.flow_control = 0;
	ep->rep_remote_cma.rnr_retry_count = 0;

	return 0;

out2:
	err = ib_destroy_cq(ep->rep_cq);
	if (err)
		dprintk("RPC:       %s: ib_destroy_cq returned %i\n",
			__func__, err);
out1:
	return rc;
}
Exemple #23
0
static int create_umr_res(struct mlx5_ib_dev *dev)
{
	struct ib_qp_init_attr *init_attr = NULL;
	struct ib_qp_attr *attr = NULL;
	struct ib_pd *pd;
	struct ib_cq *cq;
	struct ib_qp *qp;
	struct ib_cq_init_attr cq_attr = {};
	int ret;

	attr = kzalloc(sizeof(*attr), GFP_KERNEL);
	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
	if (!attr || !init_attr) {
		ret = -ENOMEM;
		goto error_0;
	}

	pd = ib_alloc_pd(&dev->ib_dev);
	if (IS_ERR(pd)) {
		mlx5_ib_dbg(dev, "Couldn't create PD for sync UMR QP\n");
		ret = PTR_ERR(pd);
		goto error_0;
	}

	cq_attr.cqe = 128;
	cq = ib_create_cq(&dev->ib_dev, mlx5_umr_cq_handler, NULL, NULL,
			  &cq_attr);
	if (IS_ERR(cq)) {
		mlx5_ib_dbg(dev, "Couldn't create CQ for sync UMR QP\n");
		ret = PTR_ERR(cq);
		goto error_2;
	}
	ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);

	init_attr->send_cq = cq;
	init_attr->recv_cq = cq;
	init_attr->sq_sig_type = IB_SIGNAL_ALL_WR;
	init_attr->cap.max_send_wr = MAX_UMR_WR;
	init_attr->cap.max_send_sge = 1;
	init_attr->qp_type = MLX5_IB_QPT_REG_UMR;
	init_attr->port_num = 1;
	qp = mlx5_ib_create_qp(pd, init_attr, NULL);
	if (IS_ERR(qp)) {
		mlx5_ib_dbg(dev, "Couldn't create sync UMR QP\n");
		ret = PTR_ERR(qp);
		goto error_3;
	}
	qp->device     = &dev->ib_dev;
	qp->real_qp    = qp;
	qp->uobject    = NULL;
	qp->qp_type    = MLX5_IB_QPT_REG_UMR;

	attr->qp_state = IB_QPS_INIT;
	attr->port_num = 1;
	ret = mlx5_ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_PKEY_INDEX |
				IB_QP_PORT, NULL);
	if (ret) {
		mlx5_ib_dbg(dev, "Couldn't modify UMR QP\n");
		goto error_4;
	}

	memset(attr, 0, sizeof(*attr));
	attr->qp_state = IB_QPS_RTR;
	attr->path_mtu = IB_MTU_256;

	ret = mlx5_ib_modify_qp(qp, attr, IB_QP_STATE, NULL);
	if (ret) {
		mlx5_ib_dbg(dev, "Couldn't modify umr QP to rtr\n");
		goto error_4;
	}

	memset(attr, 0, sizeof(*attr));
	attr->qp_state = IB_QPS_RTS;
	ret = mlx5_ib_modify_qp(qp, attr, IB_QP_STATE, NULL);
	if (ret) {
		mlx5_ib_dbg(dev, "Couldn't modify umr QP to rts\n");
		goto error_4;
	}

	dev->umrc.qp = qp;
	dev->umrc.cq = cq;
	dev->umrc.pd = pd;

	sema_init(&dev->umrc.sem, MAX_UMR_WR);
	ret = mlx5_mr_cache_init(dev);
	if (ret) {
		mlx5_ib_warn(dev, "mr cache init failed %d\n", ret);
		goto error_4;
	}

	kfree(attr);
	kfree(init_attr);

	return 0;

error_4:
	mlx5_ib_destroy_qp(qp);

error_3:
	ib_destroy_cq(cq);

error_2:
	ib_dealloc_pd(pd);

error_0:
	kfree(attr);
	kfree(init_attr);
	return ret;
}
Exemple #24
0
static void krping_free_qp(struct krping_cb *cb)
{
	ib_destroy_qp(cb->qp);
	ib_destroy_cq(cb->cq);
	ib_dealloc_pd(cb->pd);
}
Exemple #25
0
/*
 * Create unconnected endpoint.
 */
int
rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
				struct rpcrdma_create_data_internal *cdata)
{
	struct ib_device_attr *devattr = &ia->ri_devattr;
	struct ib_cq *sendcq, *recvcq;
	struct ib_cq_init_attr cq_attr = {};
	unsigned int max_qp_wr;
	int rc, err;

	if (devattr->max_sge < RPCRDMA_MAX_IOVS) {
		dprintk("RPC:       %s: insufficient sge's available\n",
			__func__);
		return -ENOMEM;
	}

	if (devattr->max_qp_wr <= RPCRDMA_BACKWARD_WRS) {
		dprintk("RPC:       %s: insufficient wqe's available\n",
			__func__);
		return -ENOMEM;
	}
	max_qp_wr = devattr->max_qp_wr - RPCRDMA_BACKWARD_WRS;

	/* check provider's send/recv wr limits */
	if (cdata->max_requests > max_qp_wr)
		cdata->max_requests = max_qp_wr;

	ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall;
	ep->rep_attr.qp_context = ep;
	ep->rep_attr.srq = NULL;
	ep->rep_attr.cap.max_send_wr = cdata->max_requests;
	ep->rep_attr.cap.max_send_wr += RPCRDMA_BACKWARD_WRS;
	rc = ia->ri_ops->ro_open(ia, ep, cdata);
	if (rc)
		return rc;
	ep->rep_attr.cap.max_recv_wr = cdata->max_requests;
	ep->rep_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS;
	ep->rep_attr.cap.max_send_sge = RPCRDMA_MAX_IOVS;
	ep->rep_attr.cap.max_recv_sge = 1;
	ep->rep_attr.cap.max_inline_data = 0;
	ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	ep->rep_attr.qp_type = IB_QPT_RC;
	ep->rep_attr.port_num = ~0;

	dprintk("RPC:       %s: requested max: dtos: send %d recv %d; "
		"iovs: send %d recv %d\n",
		__func__,
		ep->rep_attr.cap.max_send_wr,
		ep->rep_attr.cap.max_recv_wr,
		ep->rep_attr.cap.max_send_sge,
		ep->rep_attr.cap.max_recv_sge);

	/* set trigger for requesting send completion */
	ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1;
	if (ep->rep_cqinit <= 2)
		ep->rep_cqinit = 0;	/* always signal? */
	INIT_CQCOUNT(ep);
	init_waitqueue_head(&ep->rep_connect_wait);
	INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker);

	cq_attr.cqe = ep->rep_attr.cap.max_send_wr + 1;
	sendcq = ib_create_cq(ia->ri_device, rpcrdma_sendcq_upcall,
			      rpcrdma_cq_async_error_upcall, NULL, &cq_attr);
	if (IS_ERR(sendcq)) {
		rc = PTR_ERR(sendcq);
		dprintk("RPC:       %s: failed to create send CQ: %i\n",
			__func__, rc);
		goto out1;
	}

	rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP);
	if (rc) {
		dprintk("RPC:       %s: ib_req_notify_cq failed: %i\n",
			__func__, rc);
		goto out2;
	}

	cq_attr.cqe = ep->rep_attr.cap.max_recv_wr + 1;
	recvcq = ib_create_cq(ia->ri_device, rpcrdma_recvcq_upcall,
			      rpcrdma_cq_async_error_upcall, NULL, &cq_attr);
	if (IS_ERR(recvcq)) {
		rc = PTR_ERR(recvcq);
		dprintk("RPC:       %s: failed to create recv CQ: %i\n",
			__func__, rc);
		goto out2;
	}

	rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP);
	if (rc) {
		dprintk("RPC:       %s: ib_req_notify_cq failed: %i\n",
			__func__, rc);
		ib_destroy_cq(recvcq);
		goto out2;
	}

	ep->rep_attr.send_cq = sendcq;
	ep->rep_attr.recv_cq = recvcq;

	/* Initialize cma parameters */

	/* RPC/RDMA does not use private data */
	ep->rep_remote_cma.private_data = NULL;
	ep->rep_remote_cma.private_data_len = 0;

	/* Client offers RDMA Read but does not initiate */
	ep->rep_remote_cma.initiator_depth = 0;
	if (devattr->max_qp_rd_atom > 32)	/* arbitrary but <= 255 */
		ep->rep_remote_cma.responder_resources = 32;
	else
		ep->rep_remote_cma.responder_resources =
						devattr->max_qp_rd_atom;

	ep->rep_remote_cma.retry_count = 7;
	ep->rep_remote_cma.flow_control = 0;
	ep->rep_remote_cma.rnr_retry_count = 0;

	return 0;

out2:
	err = ib_destroy_cq(sendcq);
	if (err)
		dprintk("RPC:       %s: ib_destroy_cq returned %i\n",
			__func__, err);
out1:
	if (ia->ri_dma_mr)
		ib_dereg_mr(ia->ri_dma_mr);
	return rc;
}
ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
			    const char __user *buf, int in_len,
			    int out_len)
{
	struct ib_uverbs_create_cq      cmd;
	struct ib_uverbs_create_cq_resp resp;
	struct ib_udata                 udata;
	struct ib_ucq_object           *uobj;
	struct ib_uverbs_event_file    *ev_file = NULL;
	struct ib_cq                   *cq;
	int                             ret;

	if (out_len < sizeof resp)
		return -ENOSPC;

	if (copy_from_user(&cmd, buf, sizeof cmd))
		return -EFAULT;

	INIT_UDATA(&udata, buf + sizeof cmd,
		   (unsigned long) cmd.response + sizeof resp,
		   in_len - sizeof cmd, out_len - sizeof resp);

	if (cmd.comp_vector >= file->device->num_comp_vectors)
		return -EINVAL;

	uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
	if (!uobj)
		return -ENOMEM;

	if (cmd.comp_channel >= 0) {
		ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
		if (!ev_file) {
			ret = -EINVAL;
			goto err;
		}
	}

	uobj->uobject.user_handle   = cmd.user_handle;
	uobj->uobject.context       = file->ucontext;
	uobj->uverbs_file	    = file;
	uobj->comp_events_reported  = 0;
	uobj->async_events_reported = 0;
	INIT_LIST_HEAD(&uobj->comp_list);
	INIT_LIST_HEAD(&uobj->async_list);

	cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
					     file->ucontext, &udata);
	if (IS_ERR(cq)) {
		ret = PTR_ERR(cq);
		goto err;
	}

	cq->device        = file->device->ib_dev;
	cq->uobject       = &uobj->uobject;
	cq->comp_handler  = ib_uverbs_comp_handler;
	cq->event_handler = ib_uverbs_cq_event_handler;
	cq->cq_context    = ev_file;
	atomic_set(&cq->usecnt, 0);

	mutex_lock(&ib_uverbs_idr_mutex);

retry:
	if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
		ret = -ENOMEM;
		goto err_up;
	}

	ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id);

	if (ret == -EAGAIN)
		goto retry;
	if (ret)
		goto err_up;

	memset(&resp, 0, sizeof resp);
	resp.cq_handle = uobj->uobject.id;
	resp.cqe       = cq->cqe;

	if (copy_to_user((void __user *) (unsigned long) cmd.response,
			 &resp, sizeof resp)) {
		ret = -EFAULT;
		goto err_idr;
	}

	mutex_lock(&file->mutex);
	list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list);
	mutex_unlock(&file->mutex);

	mutex_unlock(&ib_uverbs_idr_mutex);

	return in_len;

err_idr:
	idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id);

err_up:
	mutex_unlock(&ib_uverbs_idr_mutex);
	ib_destroy_cq(cq);

err:
	if (ev_file)
		ib_uverbs_release_ucq(file, ev_file, uobj);
	kfree(uobj);
	return ret;
}
Exemple #27
0
/*
 * Create unconnected endpoint.
 */
int
rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
				struct rpcrdma_create_data_internal *cdata)
{
	struct ib_device_attr devattr;
	struct ib_cq *sendcq, *recvcq;
	int rc, err;

	rc = ib_query_device(ia->ri_id->device, &devattr);
	if (rc) {
		dprintk("RPC:       %s: ib_query_device failed %d\n",
			__func__, rc);
		return rc;
	}

	/* check provider's send/recv wr limits */
	if (cdata->max_requests > devattr.max_qp_wr)
		cdata->max_requests = devattr.max_qp_wr;

	ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall;
	ep->rep_attr.qp_context = ep;
	/* send_cq and recv_cq initialized below */
	ep->rep_attr.srq = NULL;
	ep->rep_attr.cap.max_send_wr = cdata->max_requests;
	switch (ia->ri_memreg_strategy) {
	case RPCRDMA_FRMR: {
		int depth = 7;

		/* Add room for frmr register and invalidate WRs.
		 * 1. FRMR reg WR for head
		 * 2. FRMR invalidate WR for head
		 * 3. N FRMR reg WRs for pagelist
		 * 4. N FRMR invalidate WRs for pagelist
		 * 5. FRMR reg WR for tail
		 * 6. FRMR invalidate WR for tail
		 * 7. The RDMA_SEND WR
		 */

		/* Calculate N if the device max FRMR depth is smaller than
		 * RPCRDMA_MAX_DATA_SEGS.
		 */
		if (ia->ri_max_frmr_depth < RPCRDMA_MAX_DATA_SEGS) {
			int delta = RPCRDMA_MAX_DATA_SEGS -
				    ia->ri_max_frmr_depth;

			do {
				depth += 2; /* FRMR reg + invalidate */
				delta -= ia->ri_max_frmr_depth;
			} while (delta > 0);

		}
		ep->rep_attr.cap.max_send_wr *= depth;
		if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) {
			cdata->max_requests = devattr.max_qp_wr / depth;
			if (!cdata->max_requests)
				return -EINVAL;
			ep->rep_attr.cap.max_send_wr = cdata->max_requests *
						       depth;
		}
		break;
	}
	default:
		break;
	}
	ep->rep_attr.cap.max_recv_wr = cdata->max_requests;
	ep->rep_attr.cap.max_send_sge = (cdata->padding ? 4 : 2);
	ep->rep_attr.cap.max_recv_sge = 1;
	ep->rep_attr.cap.max_inline_data = 0;
	ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	ep->rep_attr.qp_type = IB_QPT_RC;
	ep->rep_attr.port_num = ~0;

	dprintk("RPC:       %s: requested max: dtos: send %d recv %d; "
		"iovs: send %d recv %d\n",
		__func__,
		ep->rep_attr.cap.max_send_wr,
		ep->rep_attr.cap.max_recv_wr,
		ep->rep_attr.cap.max_send_sge,
		ep->rep_attr.cap.max_recv_sge);

	/* set trigger for requesting send completion */
	ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1;
	if (ep->rep_cqinit <= 2)
		ep->rep_cqinit = 0;
	INIT_CQCOUNT(ep);
	ep->rep_ia = ia;
	init_waitqueue_head(&ep->rep_connect_wait);
	INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker);

	sendcq = ib_create_cq(ia->ri_id->device, rpcrdma_sendcq_upcall,
				  rpcrdma_cq_async_error_upcall, ep,
				  ep->rep_attr.cap.max_send_wr + 1, 0);
	if (IS_ERR(sendcq)) {
		rc = PTR_ERR(sendcq);
		dprintk("RPC:       %s: failed to create send CQ: %i\n",
			__func__, rc);
		goto out1;
	}

	rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP);
	if (rc) {
		dprintk("RPC:       %s: ib_req_notify_cq failed: %i\n",
			__func__, rc);
		goto out2;
	}

	recvcq = ib_create_cq(ia->ri_id->device, rpcrdma_recvcq_upcall,
				  rpcrdma_cq_async_error_upcall, ep,
				  ep->rep_attr.cap.max_recv_wr + 1, 0);
	if (IS_ERR(recvcq)) {
		rc = PTR_ERR(recvcq);
		dprintk("RPC:       %s: failed to create recv CQ: %i\n",
			__func__, rc);
		goto out2;
	}

	rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP);
	if (rc) {
		dprintk("RPC:       %s: ib_req_notify_cq failed: %i\n",
			__func__, rc);
		ib_destroy_cq(recvcq);
		goto out2;
	}

	ep->rep_attr.send_cq = sendcq;
	ep->rep_attr.recv_cq = recvcq;

	/* Initialize cma parameters */

	/* RPC/RDMA does not use private data */
	ep->rep_remote_cma.private_data = NULL;
	ep->rep_remote_cma.private_data_len = 0;

	/* Client offers RDMA Read but does not initiate */
	ep->rep_remote_cma.initiator_depth = 0;
	if (devattr.max_qp_rd_atom > 32)	/* arbitrary but <= 255 */
		ep->rep_remote_cma.responder_resources = 32;
	else
		ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom;

	ep->rep_remote_cma.retry_count = 7;
	ep->rep_remote_cma.flow_control = 0;
	ep->rep_remote_cma.rnr_retry_count = 0;

	return 0;

out2:
	err = ib_destroy_cq(sendcq);
	if (err)
		dprintk("RPC:       %s: ib_destroy_cq returned %i\n",
			__func__, err);
out1:
	return rc;
}
Exemple #28
0
/*
 * This needs to be very careful to not leave IS_ERR pointers around for
 * cleanup to trip over.
 */
static int rds_ib_setup_qp(struct rds_connection *conn)
{
	struct rds_ib_connection *ic = conn->c_transport_data;
	struct ib_device *dev = ic->i_cm_id->device;
	struct ib_qp_init_attr attr;
	struct ib_cq_init_attr cq_attr = {};
	struct rds_ib_device *rds_ibdev;
	int ret, fr_queue_space;

	/*
	 * It's normal to see a null device if an incoming connection races
	 * with device removal, so we don't print a warning.
	 */
	rds_ibdev = rds_ib_get_client_data(dev);
	if (!rds_ibdev)
		return -EOPNOTSUPP;

	/* The fr_queue_space is currently set to 512, to add extra space on
	 * completion queue and send queue. This extra space is used for FRMR
	 * registration and invalidation work requests
	 */
	fr_queue_space = rds_ibdev->use_fastreg ?
			 (RDS_IB_DEFAULT_FR_WR + 1) +
			 (RDS_IB_DEFAULT_FR_INV_WR + 1)
			 : 0;

	/* add the conn now so that connection establishment has the dev */
	rds_ib_add_conn(rds_ibdev, conn);

	if (rds_ibdev->max_wrs < ic->i_send_ring.w_nr + 1)
		rds_ib_ring_resize(&ic->i_send_ring, rds_ibdev->max_wrs - 1);
	if (rds_ibdev->max_wrs < ic->i_recv_ring.w_nr + 1)
		rds_ib_ring_resize(&ic->i_recv_ring, rds_ibdev->max_wrs - 1);

	/* Protection domain and memory range */
	ic->i_pd = rds_ibdev->pd;

	ic->i_scq_vector = ibdev_get_unused_vector(rds_ibdev);
	cq_attr.cqe = ic->i_send_ring.w_nr + fr_queue_space + 1;
	cq_attr.comp_vector = ic->i_scq_vector;
	ic->i_send_cq = ib_create_cq(dev, rds_ib_cq_comp_handler_send,
				     rds_ib_cq_event_handler, conn,
				     &cq_attr);
	if (IS_ERR(ic->i_send_cq)) {
		ret = PTR_ERR(ic->i_send_cq);
		ic->i_send_cq = NULL;
		ibdev_put_vector(rds_ibdev, ic->i_scq_vector);
		rdsdebug("ib_create_cq send failed: %d\n", ret);
		goto rds_ibdev_out;
	}

	ic->i_rcq_vector = ibdev_get_unused_vector(rds_ibdev);
	cq_attr.cqe = ic->i_recv_ring.w_nr;
	cq_attr.comp_vector = ic->i_rcq_vector;
	ic->i_recv_cq = ib_create_cq(dev, rds_ib_cq_comp_handler_recv,
				     rds_ib_cq_event_handler, conn,
				     &cq_attr);
	if (IS_ERR(ic->i_recv_cq)) {
		ret = PTR_ERR(ic->i_recv_cq);
		ic->i_recv_cq = NULL;
		ibdev_put_vector(rds_ibdev, ic->i_rcq_vector);
		rdsdebug("ib_create_cq recv failed: %d\n", ret);
		goto send_cq_out;
	}

	ret = ib_req_notify_cq(ic->i_send_cq, IB_CQ_NEXT_COMP);
	if (ret) {
		rdsdebug("ib_req_notify_cq send failed: %d\n", ret);
		goto recv_cq_out;
	}

	ret = ib_req_notify_cq(ic->i_recv_cq, IB_CQ_SOLICITED);
	if (ret) {
		rdsdebug("ib_req_notify_cq recv failed: %d\n", ret);
		goto recv_cq_out;
	}

	/* XXX negotiate max send/recv with remote? */
	memset(&attr, 0, sizeof(attr));
	attr.event_handler = rds_ib_qp_event_handler;
	attr.qp_context = conn;
	/* + 1 to allow for the single ack message */
	attr.cap.max_send_wr = ic->i_send_ring.w_nr + fr_queue_space + 1;
	attr.cap.max_recv_wr = ic->i_recv_ring.w_nr + 1;
	attr.cap.max_send_sge = rds_ibdev->max_sge;
	attr.cap.max_recv_sge = RDS_IB_RECV_SGE;
	attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	attr.qp_type = IB_QPT_RC;
	attr.send_cq = ic->i_send_cq;
	attr.recv_cq = ic->i_recv_cq;
	atomic_set(&ic->i_fastreg_wrs, RDS_IB_DEFAULT_FR_WR);
	atomic_set(&ic->i_fastunreg_wrs, RDS_IB_DEFAULT_FR_INV_WR);

	/*
	 * XXX this can fail if max_*_wr is too large?  Are we supposed
	 * to back off until we get a value that the hardware can support?
	 */
	ret = rdma_create_qp(ic->i_cm_id, ic->i_pd, &attr);
	if (ret) {
		rdsdebug("rdma_create_qp failed: %d\n", ret);
		goto recv_cq_out;
	}

	ic->i_send_hdrs = ib_dma_alloc_coherent(dev,
					   ic->i_send_ring.w_nr *
						sizeof(struct rds_header),
					   &ic->i_send_hdrs_dma, GFP_KERNEL);
	if (!ic->i_send_hdrs) {
		ret = -ENOMEM;
		rdsdebug("ib_dma_alloc_coherent send failed\n");
		goto qp_out;
	}

	ic->i_recv_hdrs = ib_dma_alloc_coherent(dev,
					   ic->i_recv_ring.w_nr *
						sizeof(struct rds_header),
					   &ic->i_recv_hdrs_dma, GFP_KERNEL);
	if (!ic->i_recv_hdrs) {
		ret = -ENOMEM;
		rdsdebug("ib_dma_alloc_coherent recv failed\n");
		goto send_hdrs_dma_out;
	}

	ic->i_ack = ib_dma_alloc_coherent(dev, sizeof(struct rds_header),
				       &ic->i_ack_dma, GFP_KERNEL);
	if (!ic->i_ack) {
		ret = -ENOMEM;
		rdsdebug("ib_dma_alloc_coherent ack failed\n");
		goto recv_hdrs_dma_out;
	}

	ic->i_sends = vzalloc_node(ic->i_send_ring.w_nr * sizeof(struct rds_ib_send_work),
				   ibdev_to_node(dev));
	if (!ic->i_sends) {
		ret = -ENOMEM;
		rdsdebug("send allocation failed\n");
		goto ack_dma_out;
	}

	ic->i_recvs = vzalloc_node(ic->i_recv_ring.w_nr * sizeof(struct rds_ib_recv_work),
				   ibdev_to_node(dev));
	if (!ic->i_recvs) {
		ret = -ENOMEM;
		rdsdebug("recv allocation failed\n");
		goto sends_out;
	}

	rds_ib_recv_init_ack(ic);

	rdsdebug("conn %p pd %p cq %p %p\n", conn, ic->i_pd,
		 ic->i_send_cq, ic->i_recv_cq);

	return ret;

sends_out:
	vfree(ic->i_sends);
ack_dma_out:
	ib_dma_free_coherent(dev, sizeof(struct rds_header),
			     ic->i_ack, ic->i_ack_dma);
recv_hdrs_dma_out:
	ib_dma_free_coherent(dev, ic->i_recv_ring.w_nr *
					sizeof(struct rds_header),
					ic->i_recv_hdrs, ic->i_recv_hdrs_dma);
send_hdrs_dma_out:
	ib_dma_free_coherent(dev, ic->i_send_ring.w_nr *
					sizeof(struct rds_header),
					ic->i_send_hdrs, ic->i_send_hdrs_dma);
qp_out:
	rdma_destroy_qp(ic->i_cm_id);
recv_cq_out:
	if (!ib_destroy_cq(ic->i_recv_cq))
		ic->i_recv_cq = NULL;
send_cq_out:
	if (!ib_destroy_cq(ic->i_send_cq))
		ic->i_send_cq = NULL;
rds_ibdev_out:
	rds_ib_remove_conn(rds_ibdev, conn);
	rds_ib_dev_put(rds_ibdev);

	return ret;
}