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  * $Id: ipoib_verbs.c 1349 2004-12-16 21:09:43Z roland $
  34  */
  35
  36 #include "ipoib.h"
  37
  38 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
  39 {
  40         struct ipoib_dev_priv *priv = netdev_priv(dev);
  41         struct ib_qp_attr *qp_attr;
  42         int ret;
  43         u16 pkey_index;
  44
  45         ret = -ENOMEM;
  46         qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
  47         if (!qp_attr)
  48                 goto out;
  49
  50         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
  51                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  52                 ret = -ENXIO;
  53                 goto out;
  54         }
  55         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  56
  57         /* set correct QKey for QP */
  58         qp_attr->qkey = priv->qkey;
  59         ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
  60         if (ret) {
  61                 ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
  62                 goto out;
  63         }
  64
  65         /* attach QP to multicast group */
  66         mutex_lock(&priv->mcast_mutex);
  67         ret = ib_attach_mcast(priv->qp, mgid, mlid);
  68         mutex_unlock(&priv->mcast_mutex);
  69         if (ret)
  70                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
  71
  72 out:
  73         kfree(qp_attr);
  74         return ret;
  75 }
  76
  77 int ipoib_mcast_detach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
  78 {
  79         struct ipoib_dev_priv *priv = netdev_priv(dev);
  80         int ret;
  81
  82         mutex_lock(&priv->mcast_mutex);
  83         ret = ib_detach_mcast(priv->qp, mgid, mlid);
  84         mutex_unlock(&priv->mcast_mutex);
  85         if (ret)
  86                 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
  87
  88         return ret;
  89 }
  90
  91 int ipoib_init_qp(struct net_device *dev)
  92 {
  93         struct ipoib_dev_priv *priv = netdev_priv(dev);
  94         int ret;
  95         struct ib_qp_attr qp_attr;
  96         int attr_mask;
  97
  98         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
  99                 return -1;
 100
 101         qp_attr.qp_state = IB_QPS_INIT;
 102         qp_attr.qkey = 0;
 103         qp_attr.port_num = priv->port;
 104         qp_attr.pkey_index = priv->pkey_index;
 105         attr_mask =
 106             IB_QP_QKEY |
 107             IB_QP_PORT |
 108             IB_QP_PKEY_INDEX |
 109             IB_QP_STATE;
 110         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 111         if (ret) {
 112                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
 113                 goto out_fail;
 114         }
 115
 116         qp_attr.qp_state = IB_QPS_RTR;
 117         /* Can't set this in a INIT->RTR transition */
 118         attr_mask &= ~IB_QP_PORT;
 119         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 120         if (ret) {
 121                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
 122                 goto out_fail;
 123         }
 124
 125         qp_attr.qp_state = IB_QPS_RTS;
 126         qp_attr.sq_psn = 0;
 127         attr_mask |= IB_QP_SQ_PSN;
 128         attr_mask &= ~IB_QP_PKEY_INDEX;
 129         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 130         if (ret) {
 131                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
 132                 goto out_fail;
 133         }
 134
 135         return 0;
 136
 137 out_fail:
 138         qp_attr.qp_state = IB_QPS_RESET;
 139         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 140                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 141
 142         return ret;
 143 }
 144
 145 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
 146 {
 147         struct ipoib_dev_priv *priv = netdev_priv(dev);
 148         struct ib_qp_init_attr init_attr = {
 149                 .cap = {
 150                         .max_send_wr  = ipoib_sendq_size,
 151                         .max_recv_wr  = ipoib_recvq_size,
 152                         .max_send_sge = 1,
 153                         .max_recv_sge = IPOIB_UD_RX_SG
 154                 },
 155                 .sq_sig_type = IB_SIGNAL_ALL_WR,
 156                 .qp_type     = IB_QPT_UD
 157         };
 158
 159         int ret, size;
 160         int i;
 161
 162         priv->pd = ib_alloc_pd(priv->ca);
 163         if (IS_ERR(priv->pd)) {
 164                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
 165                 return -ENODEV;
 166         }
 167
 168         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
 169         if (IS_ERR(priv->mr)) {
 170                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
 171                 goto out_free_pd;
 172         }
 173
 174         size = ipoib_recvq_size + 1;
 175         ret = ipoib_cm_dev_init(dev);
 176         if (!ret) {
 177                 size += ipoib_sendq_size;
 178                 if (ipoib_cm_has_srq(dev))
 179                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
 180                 else
 181                         size += ipoib_recvq_size * ipoib_max_conn_qp;
 182         }
 183
 184         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
 185         if (IS_ERR(priv->recv_cq)) {
 186                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
 187                 goto out_free_mr;
 188         }
 189
 190         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
 191                                      dev, ipoib_sendq_size, 0);
 192         if (IS_ERR(priv->send_cq)) {
 193                 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
 194                 goto out_free_recv_cq;
 195         }
 196
 197         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
 198                 goto out_free_send_cq;
 199
 200         init_attr.send_cq = priv->send_cq;
 201         init_attr.recv_cq = priv->recv_cq;
 202
 203         if (priv->hca_caps & IB_DEVICE_UD_TSO)
 204                 init_attr.create_flags = IB_QP_CREATE_IPOIB_UD_LSO;
 205
 206         if (dev->features & NETIF_F_SG)
 207                 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
 208
 209         priv->qp = ib_create_qp(priv->pd, &init_attr);
 210         if (IS_ERR(priv->qp)) {
 211                 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
 212                 goto out_free_send_cq;
 213         }
 214
 215         priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
 216         priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
 217         priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;
 218
 219         for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
 220                 priv->tx_sge[i].lkey = priv->mr->lkey;
 221
 222         priv->tx_wr.opcode      = IB_WR_SEND;
 223         priv->tx_wr.sg_list     = priv->tx_sge;
 224         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
 225
 226         priv->rx_sge[0].lkey = priv->mr->lkey;
 227         if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
 228                 priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
 229                 priv->rx_sge[1].length = PAGE_SIZE;
 230                 priv->rx_sge[1].lkey = priv->mr->lkey;
 231                 priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
 232         } else {
 233                 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
 234                 priv->rx_wr.num_sge = 1;
 235         }
 236         priv->rx_wr.next = NULL;
 237         priv->rx_wr.sg_list = priv->rx_sge;
 238
 239         return 0;
 240
 241 out_free_send_cq:
 242         ib_destroy_cq(priv->send_cq);
 243
 244 out_free_recv_cq:
 245         ib_destroy_cq(priv->recv_cq);
 246
 247 out_free_mr:
 248         ib_dereg_mr(priv->mr);
 249         ipoib_cm_dev_cleanup(dev);
 250
 251 out_free_pd:
 252         ib_dealloc_pd(priv->pd);
 253         return -ENODEV;
 254 }
 255
 256 void ipoib_transport_dev_cleanup(struct net_device *dev)
 257 {
 258         struct ipoib_dev_priv *priv = netdev_priv(dev);
 259
 260         if (priv->qp) {
 261                 if (ib_destroy_qp(priv->qp))
 262                         ipoib_warn(priv, "ib_qp_destroy failed\n");
 263
 264                 priv->qp = NULL;
 265                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 266         }
 267
 268         if (ib_destroy_cq(priv->send_cq))
 269                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
 270
 271         if (ib_destroy_cq(priv->recv_cq))
 272                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
 273
 274         ipoib_cm_dev_cleanup(dev);
 275
 276         if (ib_dereg_mr(priv->mr))
 277                 ipoib_warn(priv, "ib_dereg_mr failed\n");
 278
 279         if (ib_dealloc_pd(priv->pd))
 280                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
 281 }
 282
 283 void ipoib_event(struct ib_event_handler *handler,
 284                  struct ib_event *record)
 285 {
 286         struct ipoib_dev_priv *priv =
 287                 container_of(handler, struct ipoib_dev_priv, event_handler);
 288
 289         if (record->element.port_num != priv->port)
 290                 return;
 291
 292         if (record->event == IB_EVENT_PORT_ERR    ||
 293             record->event == IB_EVENT_PORT_ACTIVE ||
 294             record->event == IB_EVENT_LID_CHANGE  ||
 295             record->event == IB_EVENT_SM_CHANGE   ||
 296             record->event == IB_EVENT_CLIENT_REREGISTER) {
 297                 ipoib_dbg(priv, "Port state change event\n");
 298                 queue_work(ipoib_workqueue, &priv->flush_task);
 299         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
 300                 ipoib_dbg(priv, "P_Key change event on port:%d\n", priv->port);
 301                 queue_work(ipoib_workqueue, &priv->pkey_event_task);
 302         }
 303 }