1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
new file mode 100644
index 000000000..368e5d774
--- /dev/null
+++ b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/slab.h>
+
+#include "ipoib.h"
+
+int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
+		       union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey)
+{
+	struct ipoib_dev_priv *priv = ipoib_priv(dev);
+	struct ib_qp_attr *qp_attr = NULL;
+	int ret;
+	u16 pkey_index;
+
+	if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
+		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+		ret = -ENXIO;
+		goto out;
+	}
+	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
+
+	if (set_qkey) {
+		ret = -ENOMEM;
+		qp_attr = kmalloc(sizeof(*qp_attr), GFP_KERNEL);
+		if (!qp_attr)
+			goto out;
+
+		/* set correct QKey for QP */
+		qp_attr->qkey = qkey;
+		ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
+		if (ret) {
+			ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
+			goto out;
+		}
+	}
+
+	/* attach QP to multicast group */
+	ret = ib_attach_mcast(priv->qp, mgid, mlid);
+	if (ret)
+		ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
+
+out:
+	kfree(qp_attr);
+	return ret;
+}
+
+int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
+		       union ib_gid *mgid, u16 mlid)
+{
+	struct ipoib_dev_priv *priv = ipoib_priv(dev);
+	int ret;
+
+	ret = ib_detach_mcast(priv->qp, mgid, mlid);
+
+	return ret;
+}
+
+int ipoib_init_qp(struct net_device *dev)
+{
+	struct ipoib_dev_priv *priv = ipoib_priv(dev);
+	int ret;
+	struct ib_qp_attr qp_attr;
+	int attr_mask;
+
+	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
+		return -1;
+
+	qp_attr.qp_state = IB_QPS_INIT;
+	qp_attr.qkey = 0;
+	qp_attr.port_num = priv->port;
+	qp_attr.pkey_index = priv->pkey_index;
+	attr_mask =
+	    IB_QP_QKEY |
+	    IB_QP_PORT |
+	    IB_QP_PKEY_INDEX |
+	    IB_QP_STATE;
+	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
+	if (ret) {
+		ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
+		goto out_fail;
+	}
+
+	qp_attr.qp_state = IB_QPS_RTR;
+	/* Can't set this in a INIT->RTR transition */
+	attr_mask &= ~IB_QP_PORT;
+	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
+	if (ret) {
+		ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
+		goto out_fail;
+	}
+
+	qp_attr.qp_state = IB_QPS_RTS;
+	qp_attr.sq_psn = 0;
+	attr_mask |= IB_QP_SQ_PSN;
+	attr_mask &= ~IB_QP_PKEY_INDEX;
+	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
+	if (ret) {
+		ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
+		goto out_fail;
+	}
+
+	return 0;
+
+out_fail:
+	qp_attr.qp_state = IB_QPS_RESET;
+	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
+		ipoib_warn(priv, "Failed to modify QP to RESET state\n");
+
+	return ret;
+}
+
+int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
+{
+	struct ipoib_dev_priv *priv = ipoib_priv(dev);
+	struct ib_qp_init_attr init_attr = {
+		.cap = {
+			.max_send_wr  = ipoib_sendq_size,
+			.max_recv_wr  = ipoib_recvq_size,
+			.max_send_sge = min_t(u32, priv->ca->attrs.max_send_sge,
+					      MAX_SKB_FRAGS + 1),
+			.max_recv_sge = IPOIB_UD_RX_SG
+		},
+		.sq_sig_type = IB_SIGNAL_ALL_WR,
+		.qp_type     = IB_QPT_UD
+	};
+	struct ib_cq_init_attr cq_attr = {};
+
+	int ret, size, req_vec;
+	int i;
+	static atomic_t counter;
+
+	size = ipoib_recvq_size + 1;
+	ret = ipoib_cm_dev_init(dev);
+	if (!ret) {
+		size += ipoib_sendq_size;
+		if (ipoib_cm_has_srq(dev))
+			size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
+		else
+			size += ipoib_recvq_size * ipoib_max_conn_qp;
+	} else
+		if (ret != -EOPNOTSUPP)
+			return ret;
+
+	req_vec = atomic_inc_return(&counter) * 2;
+	cq_attr.cqe = size;
+	cq_attr.comp_vector = req_vec % priv->ca->num_comp_vectors;
+	priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_rx_completion, NULL,
+				     priv, &cq_attr);
+	if (IS_ERR(priv->recv_cq)) {
+		pr_warn("%s: failed to create receive CQ\n", ca->name);
+		goto out_cm_dev_cleanup;
+	}
+
+	cq_attr.cqe = ipoib_sendq_size;
+	cq_attr.comp_vector = (req_vec + 1) % priv->ca->num_comp_vectors;
+	priv->send_cq = ib_create_cq(priv->ca, ipoib_ib_tx_completion, NULL,
+				     priv, &cq_attr);
+	if (IS_ERR(priv->send_cq)) {
+		pr_warn("%s: failed to create send CQ\n", ca->name);
+		goto out_free_recv_cq;
+	}
+
+	if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
+		goto out_free_send_cq;
+
+	init_attr.send_cq = priv->send_cq;
+	init_attr.recv_cq = priv->recv_cq;
+
+	if (priv->kernel_caps & IBK_UD_TSO)
+		init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
+
+	if (priv->kernel_caps & IBK_BLOCK_MULTICAST_LOOPBACK)
+		init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
+
+	if (priv->hca_caps & IB_DEVICE_MANAGED_FLOW_STEERING)
+		init_attr.create_flags |= IB_QP_CREATE_NETIF_QP;
+
+	if (priv->kernel_caps & IBK_RDMA_NETDEV_OPA)
+		init_attr.create_flags |= IB_QP_CREATE_NETDEV_USE;
+
+	priv->qp = ib_create_qp(priv->pd, &init_attr);
+	if (IS_ERR(priv->qp)) {
+		pr_warn("%s: failed to create QP\n", ca->name);
+		goto out_free_send_cq;
+	}
+
+	if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
+		goto out_free_send_cq;
+
+	for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
+		priv->tx_sge[i].lkey = priv->pd->local_dma_lkey;
+
+	priv->tx_wr.wr.opcode		= IB_WR_SEND;
+	priv->tx_wr.wr.sg_list		= priv->tx_sge;
+	priv->tx_wr.wr.send_flags	= IB_SEND_SIGNALED;
+
+	priv->rx_sge[0].lkey = priv->pd->local_dma_lkey;
+
+	priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
+	priv->rx_wr.num_sge = 1;
+
+	priv->rx_wr.next = NULL;
+	priv->rx_wr.sg_list = priv->rx_sge;
+
+	if (init_attr.cap.max_send_sge > 1)
+		dev->features |= NETIF_F_SG;
+
+	priv->max_send_sge = init_attr.cap.max_send_sge;
+
+	return 0;
+
+out_free_send_cq:
+	ib_destroy_cq(priv->send_cq);
+
+out_free_recv_cq:
+	ib_destroy_cq(priv->recv_cq);
+
+out_cm_dev_cleanup:
+	ipoib_cm_dev_cleanup(dev);
+
+	return -ENODEV;
+}
+
+void ipoib_transport_dev_cleanup(struct net_device *dev)
+{
+	struct ipoib_dev_priv *priv = ipoib_priv(dev);
+
+	if (priv->qp) {
+		if (ib_destroy_qp(priv->qp))
+			ipoib_warn(priv, "ib_qp_destroy failed\n");
+
+		priv->qp = NULL;
+	}
+
+	ib_destroy_cq(priv->send_cq);
+	ib_destroy_cq(priv->recv_cq);
+}
+
+void ipoib_event(struct ib_event_handler *handler,
+		 struct ib_event *record)
+{
+	struct ipoib_dev_priv *priv =
+		container_of(handler, struct ipoib_dev_priv, event_handler);
+
+	if (record->element.port_num != priv->port)
+		return;
+
+	ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
+		  dev_name(&record->device->dev), record->element.port_num);
+
+	if (record->event == IB_EVENT_CLIENT_REREGISTER) {
+		queue_work(ipoib_workqueue, &priv->flush_light);
+	} else if (record->event == IB_EVENT_PORT_ERR ||
+		   record->event == IB_EVENT_PORT_ACTIVE ||
+		   record->event == IB_EVENT_LID_CHANGE) {
+		queue_work(ipoib_workqueue, &priv->flush_normal);
+	} else if (record->event == IB_EVENT_PKEY_CHANGE) {
+		queue_work(ipoib_workqueue, &priv->flush_heavy);
+	} else if (record->event == IB_EVENT_GID_CHANGE &&
+		   !test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
+		queue_work(ipoib_workqueue, &priv->flush_light);
+	}
+}