drivers/infiniband/ulp/ipoib/ipoib_verbs.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/slab.h>
  35
  36 #include "ipoib.h"
  37
  38 int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
  39                        union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey)
  40 {
  41         struct ipoib_dev_priv *priv = ipoib_priv(dev);
  42         struct ib_qp_attr *qp_attr = NULL;
  43         int ret;
  44         u16 pkey_index;
  45
  46         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
  47                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  48                 ret = -ENXIO;
  49                 goto out;
  50         }
  51         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  52
  53         if (set_qkey) {
  54                 ret = -ENOMEM;
  55                 qp_attr = kmalloc(sizeof(*qp_attr), GFP_KERNEL);
  56                 if (!qp_attr)
  57                         goto out;
  58
  59                 /* set correct QKey for QP */
  60                 qp_attr->qkey = qkey;
  61                 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
  62                 if (ret) {
  63                         ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
  64                         goto out;
  65                 }
  66         }
  67
  68         /* attach QP to multicast group */
  69         ret = ib_attach_mcast(priv->qp, mgid, mlid);
  70         if (ret)
  71                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
  72
  73 out:
  74         kfree(qp_attr);
  75         return ret;
  76 }
  77
  78 int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
  79                        union ib_gid *mgid, u16 mlid)
  80 {
  81         struct ipoib_dev_priv *priv = ipoib_priv(dev);
  82         int ret;
  83
  84         ret = ib_detach_mcast(priv->qp, mgid, mlid);
  85
  86         return ret;
  87 }
  88
  89 int ipoib_init_qp(struct net_device *dev)
  90 {
  91         struct ipoib_dev_priv *priv = ipoib_priv(dev);
  92         int ret;
  93         struct ib_qp_attr qp_attr;
  94         int attr_mask;
  95
  96         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
  97                 return -1;
  98
  99         qp_attr.qp_state = IB_QPS_INIT;
 100         qp_attr.qkey = 0;
 101         qp_attr.port_num = priv->port;
 102         qp_attr.pkey_index = priv->pkey_index;
 103         attr_mask =
 104             IB_QP_QKEY |
 105             IB_QP_PORT |
 106             IB_QP_PKEY_INDEX |
 107             IB_QP_STATE;
 108         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 109         if (ret) {
 110                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
 111                 goto out_fail;
 112         }
 113
 114         qp_attr.qp_state = IB_QPS_RTR;
 115         /* Can't set this in a INIT->RTR transition */
 116         attr_mask &= ~IB_QP_PORT;
 117         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 118         if (ret) {
 119                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
 120                 goto out_fail;
 121         }
 122
 123         qp_attr.qp_state = IB_QPS_RTS;
 124         qp_attr.sq_psn = 0;
 125         attr_mask |= IB_QP_SQ_PSN;
 126         attr_mask &= ~IB_QP_PKEY_INDEX;
 127         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 128         if (ret) {
 129                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
 130                 goto out_fail;
 131         }
 132
 133         return 0;
 134
 135 out_fail:
 136         qp_attr.qp_state = IB_QPS_RESET;
 137         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 138                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 139
 140         return ret;
 141 }
 142
 143 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
 144 {
 145         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 146         struct ib_qp_init_attr init_attr = {
 147                 .cap = {
 148                         .max_send_wr  = ipoib_sendq_size,
 149                         .max_recv_wr  = ipoib_recvq_size,
 150                         .max_send_sge = min_t(u32, priv->ca->attrs.max_send_sge,
 151                                               MAX_SKB_FRAGS + 1),
 152                         .max_recv_sge = IPOIB_UD_RX_SG
 153                 },
 154                 .sq_sig_type = IB_SIGNAL_ALL_WR,
 155                 .qp_type     = IB_QPT_UD
 156         };
 157         struct ib_cq_init_attr cq_attr = {};
 158
 159         int ret, size, req_vec;
 160         int i;
 161
 162         size = ipoib_recvq_size + 1;
 163         ret = ipoib_cm_dev_init(dev);
 164         if (!ret) {
 165                 size += ipoib_sendq_size;
 166                 if (ipoib_cm_has_srq(dev))
 167                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
 168                 else
 169                         size += ipoib_recvq_size * ipoib_max_conn_qp;
 170         } else
 171                 if (ret != -EOPNOTSUPP)
 172                         return ret;
 173
 174         req_vec = (priv->port - 1) * 2;
 175
 176         cq_attr.cqe = size;
 177         cq_attr.comp_vector = req_vec % priv->ca->num_comp_vectors;
 178         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_rx_completion, NULL,
 179                                      priv, &cq_attr);
 180         if (IS_ERR(priv->recv_cq)) {
 181                 pr_warn("%s: failed to create receive CQ\n", ca->name);
 182                 goto out_cm_dev_cleanup;
 183         }
 184
 185         cq_attr.cqe = ipoib_sendq_size;
 186         cq_attr.comp_vector = (req_vec + 1) % priv->ca->num_comp_vectors;
 187         priv->send_cq = ib_create_cq(priv->ca, ipoib_ib_tx_completion, NULL,
 188                                      priv, &cq_attr);
 189         if (IS_ERR(priv->send_cq)) {
 190                 pr_warn("%s: failed to create send CQ\n", ca->name);
 191                 goto out_free_recv_cq;
 192         }
 193
 194         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
 195                 goto out_free_send_cq;
 196
 197         init_attr.send_cq = priv->send_cq;
 198         init_attr.recv_cq = priv->recv_cq;
 199
 200         if (priv->hca_caps & IB_DEVICE_UD_TSO)
 201                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
 202
 203         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
 204                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
 205
 206         if (priv->hca_caps & IB_DEVICE_MANAGED_FLOW_STEERING)
 207                 init_attr.create_flags |= IB_QP_CREATE_NETIF_QP;
 208
 209         priv->qp = ib_create_qp(priv->pd, &init_attr);
 210         if (IS_ERR(priv->qp)) {
 211                 pr_warn("%s: failed to create QP\n", ca->name);
 212                 goto out_free_send_cq;
 213         }
 214
 215         if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
 216                 goto out_free_send_cq;
 217
 218         for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
 219                 priv->tx_sge[i].lkey = priv->pd->local_dma_lkey;
 220
 221         priv->tx_wr.wr.opcode           = IB_WR_SEND;
 222         priv->tx_wr.wr.sg_list          = priv->tx_sge;
 223         priv->tx_wr.wr.send_flags       = IB_SEND_SIGNALED;
 224
 225         priv->rx_sge[0].lkey = priv->pd->local_dma_lkey;
 226
 227         priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
 228         priv->rx_wr.num_sge = 1;
 229
 230         priv->rx_wr.next = NULL;
 231         priv->rx_wr.sg_list = priv->rx_sge;
 232
 233         if (init_attr.cap.max_send_sge > 1)
 234                 dev->features |= NETIF_F_SG;
 235
 236         priv->max_send_sge = init_attr.cap.max_send_sge;
 237
 238         return 0;
 239
 240 out_free_send_cq:
 241         ib_destroy_cq(priv->send_cq);
 242
 243 out_free_recv_cq:
 244         ib_destroy_cq(priv->recv_cq);
 245
 246 out_cm_dev_cleanup:
 247         ipoib_cm_dev_cleanup(dev);
 248
 249         return -ENODEV;
 250 }
 251
 252 void ipoib_transport_dev_cleanup(struct net_device *dev)
 253 {
 254         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 255
 256         if (priv->qp) {
 257                 if (ib_destroy_qp(priv->qp))
 258                         ipoib_warn(priv, "ib_qp_destroy failed\n");
 259
 260                 priv->qp = NULL;
 261         }
 262
 263         ib_destroy_cq(priv->send_cq);
 264         ib_destroy_cq(priv->recv_cq);
 265 }
 266
 267 void ipoib_event(struct ib_event_handler *handler,
 268                  struct ib_event *record)
 269 {
 270         struct ipoib_dev_priv *priv =
 271                 container_of(handler, struct ipoib_dev_priv, event_handler);
 272
 273         if (record->element.port_num != priv->port)
 274                 return;
 275
 276         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
 277                   dev_name(&record->device->dev), record->element.port_num);
 278
 279         if (record->event == IB_EVENT_CLIENT_REREGISTER) {
 280                 queue_work(ipoib_workqueue, &priv->flush_light);
 281         } else if (record->event == IB_EVENT_PORT_ERR ||
 282                    record->event == IB_EVENT_PORT_ACTIVE ||
 283                    record->event == IB_EVENT_LID_CHANGE) {
 284                 queue_work(ipoib_workqueue, &priv->flush_normal);
 285         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
 286                 queue_work(ipoib_workqueue, &priv->flush_heavy);
 287         } else if (record->event == IB_EVENT_GID_CHANGE &&
 288                    !test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
 289                 queue_work(ipoib_workqueue, &priv->flush_light);
 290         }
 291 }