315 lines
8.5 KiB
C
315 lines
8.5 KiB
C
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/*
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* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/slab.h>
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#include "ipoib.h"
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int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid, int set_qkey)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ib_qp_attr *qp_attr = NULL;
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int ret;
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u16 pkey_index;
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if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
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clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
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ret = -ENXIO;
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goto out;
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}
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set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
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if (set_qkey) {
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ret = -ENOMEM;
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qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
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if (!qp_attr)
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goto out;
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/* set correct QKey for QP */
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qp_attr->qkey = priv->qkey;
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ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
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if (ret) {
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ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
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goto out;
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}
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}
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/* attach QP to multicast group */
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ret = ib_attach_mcast(priv->qp, mgid, mlid);
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if (ret)
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ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
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out:
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kfree(qp_attr);
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return ret;
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}
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int ipoib_init_qp(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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int ret;
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struct ib_qp_attr qp_attr;
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int attr_mask;
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if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
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return -1;
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qp_attr.qp_state = IB_QPS_INIT;
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qp_attr.qkey = 0;
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qp_attr.port_num = priv->port;
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qp_attr.pkey_index = priv->pkey_index;
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attr_mask =
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IB_QP_QKEY |
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IB_QP_PORT |
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IB_QP_PKEY_INDEX |
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IB_QP_STATE;
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ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
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if (ret) {
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ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
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goto out_fail;
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}
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qp_attr.qp_state = IB_QPS_RTR;
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/* Can't set this in a INIT->RTR transition */
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attr_mask &= ~IB_QP_PORT;
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ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
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if (ret) {
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ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
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goto out_fail;
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}
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qp_attr.qp_state = IB_QPS_RTS;
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qp_attr.sq_psn = 0;
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attr_mask |= IB_QP_SQ_PSN;
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attr_mask &= ~IB_QP_PKEY_INDEX;
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ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
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if (ret) {
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ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
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goto out_fail;
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}
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return 0;
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out_fail:
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qp_attr.qp_state = IB_QPS_RESET;
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if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
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ipoib_warn(priv, "Failed to modify QP to RESET state\n");
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return ret;
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}
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int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ib_qp_init_attr init_attr = {
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.cap = {
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.max_send_wr = ipoib_sendq_size,
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.max_recv_wr = ipoib_recvq_size,
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.max_send_sge = min_t(u32, priv->ca->attrs.max_sge,
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MAX_SKB_FRAGS + 1),
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.max_recv_sge = IPOIB_UD_RX_SG
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},
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.sq_sig_type = IB_SIGNAL_ALL_WR,
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.qp_type = IB_QPT_UD
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};
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struct ib_cq_init_attr cq_attr = {};
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int ret, size;
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int i;
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priv->pd = ib_alloc_pd(priv->ca, 0);
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if (IS_ERR(priv->pd)) {
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printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
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return -ENODEV;
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}
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/*
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* the various IPoIB tasks assume they will never race against
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* themselves, so always use a single thread workqueue
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*/
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priv->wq = alloc_ordered_workqueue("ipoib_wq", WQ_MEM_RECLAIM);
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if (!priv->wq) {
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printk(KERN_WARNING "ipoib: failed to allocate device WQ\n");
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goto out_free_pd;
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}
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size = ipoib_recvq_size + 1;
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ret = ipoib_cm_dev_init(dev);
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if (!ret) {
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size += ipoib_sendq_size;
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if (ipoib_cm_has_srq(dev))
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size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
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else
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size += ipoib_recvq_size * ipoib_max_conn_qp;
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} else
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if (ret != -ENOSYS)
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goto out_free_wq;
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cq_attr.cqe = size;
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priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL,
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dev, &cq_attr);
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if (IS_ERR(priv->recv_cq)) {
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printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
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goto out_cm_dev_cleanup;
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}
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cq_attr.cqe = ipoib_sendq_size;
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priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
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dev, &cq_attr);
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if (IS_ERR(priv->send_cq)) {
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printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
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goto out_free_recv_cq;
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}
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if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
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goto out_free_send_cq;
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init_attr.send_cq = priv->send_cq;
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init_attr.recv_cq = priv->recv_cq;
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if (priv->hca_caps & IB_DEVICE_UD_TSO)
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init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
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if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
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init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
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if (priv->hca_caps & IB_DEVICE_MANAGED_FLOW_STEERING)
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init_attr.create_flags |= IB_QP_CREATE_NETIF_QP;
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priv->qp = ib_create_qp(priv->pd, &init_attr);
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if (IS_ERR(priv->qp)) {
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printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
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goto out_free_send_cq;
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}
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priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
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priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
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priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;
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for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
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priv->tx_sge[i].lkey = priv->pd->local_dma_lkey;
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priv->tx_wr.wr.opcode = IB_WR_SEND;
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priv->tx_wr.wr.sg_list = priv->tx_sge;
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priv->tx_wr.wr.send_flags = IB_SEND_SIGNALED;
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priv->rx_sge[0].lkey = priv->pd->local_dma_lkey;
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priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
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priv->rx_wr.num_sge = 1;
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priv->rx_wr.next = NULL;
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priv->rx_wr.sg_list = priv->rx_sge;
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if (init_attr.cap.max_send_sge > 1)
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dev->features |= NETIF_F_SG;
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priv->max_send_sge = init_attr.cap.max_send_sge;
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return 0;
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out_free_send_cq:
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ib_destroy_cq(priv->send_cq);
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out_free_recv_cq:
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ib_destroy_cq(priv->recv_cq);
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out_cm_dev_cleanup:
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ipoib_cm_dev_cleanup(dev);
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out_free_wq:
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destroy_workqueue(priv->wq);
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priv->wq = NULL;
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out_free_pd:
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ib_dealloc_pd(priv->pd);
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return -ENODEV;
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}
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void ipoib_transport_dev_cleanup(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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if (priv->qp) {
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if (ib_destroy_qp(priv->qp))
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ipoib_warn(priv, "ib_qp_destroy failed\n");
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priv->qp = NULL;
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clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
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}
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if (ib_destroy_cq(priv->send_cq))
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ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
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if (ib_destroy_cq(priv->recv_cq))
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ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
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ipoib_cm_dev_cleanup(dev);
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if (priv->wq) {
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flush_workqueue(priv->wq);
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destroy_workqueue(priv->wq);
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priv->wq = NULL;
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}
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ib_dealloc_pd(priv->pd);
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}
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void ipoib_event(struct ib_event_handler *handler,
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struct ib_event *record)
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{
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struct ipoib_dev_priv *priv =
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container_of(handler, struct ipoib_dev_priv, event_handler);
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if (record->element.port_num != priv->port)
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return;
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ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
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record->device->name, record->element.port_num);
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if (record->event == IB_EVENT_SM_CHANGE ||
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record->event == IB_EVENT_CLIENT_REREGISTER) {
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queue_work(ipoib_workqueue, &priv->flush_light);
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} else if (record->event == IB_EVENT_PORT_ERR ||
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record->event == IB_EVENT_PORT_ACTIVE ||
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record->event == IB_EVENT_LID_CHANGE) {
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queue_work(ipoib_workqueue, &priv->flush_normal);
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} else if (record->event == IB_EVENT_PKEY_CHANGE) {
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queue_work(ipoib_workqueue, &priv->flush_heavy);
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} else if (record->event == IB_EVENT_GID_CHANGE &&
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!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
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queue_work(ipoib_workqueue, &priv->flush_light);
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}
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}
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