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 "ipoib.h"
  35
  36 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid, int set_qkey)
  37 {
  38         struct ipoib_dev_priv *priv = netdev_priv(dev);
  39         struct ib_qp_attr *qp_attr = NULL;
  40         int ret;
  41         u16 pkey_index;
  42
  43         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
  44                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  45                 ret = -ENXIO;
  46                 goto out;
  47         }
  48         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  49
  50         if (set_qkey) {
  51                 ret = -ENOMEM;
  52                 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
  53                 if (!qp_attr)
  54                         goto out;
  55
  56                 /* set correct QKey for QP */
  57                 qp_attr->qkey = priv->qkey;
  58                 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
  59                 if (ret) {
  60                         ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
  61                         goto out;
  62                 }
  63         }
  64
  65         /* attach QP to multicast group */
  66         ret = ib_attach_mcast(priv->qp, mgid, mlid);
  67         if (ret)
  68                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
  69
  70 out:
  71         kfree(qp_attr);
  72         return ret;
  73 }
  74
  75 int ipoib_mcast_detach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
  76 {
  77         struct ipoib_dev_priv *priv = netdev_priv(dev);
  78         int ret;
  79
  80         ret = ib_detach_mcast(priv->qp, mgid, mlid);
  81         if (ret)
  82                 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
  83
  84         return ret;
  85 }
  86
  87 int ipoib_init_qp(struct net_device *dev)
  88 {
  89         struct ipoib_dev_priv *priv = netdev_priv(dev);
  90         int ret;
  91         struct ib_qp_attr qp_attr;
  92         int attr_mask;
  93
  94         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
  95                 return -1;
  96
  97         qp_attr.qp_state = IB_QPS_INIT;
  98         qp_attr.qkey = 0;
  99         qp_attr.port_num = priv->port;
 100         qp_attr.pkey_index = priv->pkey_index;
 101         attr_mask =
 102             IB_QP_QKEY |
 103             IB_QP_PORT |
 104             IB_QP_PKEY_INDEX |
 105             IB_QP_STATE;
 106         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 107         if (ret) {
 108                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
 109                 goto out_fail;
 110         }
 111
 112         qp_attr.qp_state = IB_QPS_RTR;
 113         /* Can't set this in a INIT->RTR transition */
 114         attr_mask &= ~IB_QP_PORT;
 115         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 116         if (ret) {
 117                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
 118                 goto out_fail;
 119         }
 120
 121         qp_attr.qp_state = IB_QPS_RTS;
 122         qp_attr.sq_psn = 0;
 123         attr_mask |= IB_QP_SQ_PSN;
 124         attr_mask &= ~IB_QP_PKEY_INDEX;
 125         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 126         if (ret) {
 127                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
 128                 goto out_fail;
 129         }
 130
 131         return 0;
 132
 133 out_fail:
 134         qp_attr.qp_state = IB_QPS_RESET;
 135         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 136                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 137
 138         return ret;
 139 }
 140
 141 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
 142 {
 143         struct ipoib_dev_priv *priv = netdev_priv(dev);
 144         struct ib_qp_init_attr init_attr = {
 145                 .cap = {
 146                         .max_send_wr  = ipoib_sendq_size,
 147                         .max_recv_wr  = ipoib_recvq_size,
 148                         .max_send_sge = 1,
 149                         .max_recv_sge = IPOIB_UD_RX_SG
 150                 },
 151                 .sq_sig_type = IB_SIGNAL_ALL_WR,
 152                 .qp_type     = IB_QPT_UD
 153         };
 154
 155         int ret, size;
 156         int i;
 157
 158         priv->pd = ib_alloc_pd(priv->ca);
 159         if (IS_ERR(priv->pd)) {
 160                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
 161                 return -ENODEV;
 162         }
 163
 164         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
 165         if (IS_ERR(priv->mr)) {
 166                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
 167                 goto out_free_pd;
 168         }
 169
 170         size = ipoib_recvq_size + 1;
 171         ret = ipoib_cm_dev_init(dev);
 172         if (!ret) {
 173                 size += ipoib_sendq_size;
 174                 if (ipoib_cm_has_srq(dev))
 175                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
 176                 else
 177                         size += ipoib_recvq_size * ipoib_max_conn_qp;
 178         }
 179
 180         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
 181         if (IS_ERR(priv->recv_cq)) {
 182                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
 183                 goto out_free_mr;
 184         }
 185
 186         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
 187                                      dev, ipoib_sendq_size, 0);
 188         if (IS_ERR(priv->send_cq)) {
 189                 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
 190                 goto out_free_recv_cq;
 191         }
 192
 193         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
 194                 goto out_free_send_cq;
 195
 196         init_attr.send_cq = priv->send_cq;
 197         init_attr.recv_cq = priv->recv_cq;
 198
 199         if (priv->hca_caps & IB_DEVICE_UD_TSO)
 200                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
 201
 202         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
 203                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
 204
 205         if (dev->features & NETIF_F_SG)
 206                 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
 207
 208         priv->qp = ib_create_qp(priv->pd, &init_attr);
 209         if (IS_ERR(priv->qp)) {
 210                 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
 211                 goto out_free_send_cq;
 212         }
 213
 214         priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
 215         priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
 216         priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;
 217
 218         for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
 219                 priv->tx_sge[i].lkey = priv->mr->lkey;
 220
 221         priv->tx_wr.opcode      = IB_WR_SEND;
 222         priv->tx_wr.sg_list     = priv->tx_sge;
 223         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
 224
 225         priv->rx_sge[0].lkey = priv->mr->lkey;
 226         if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
 227                 priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
 228                 priv->rx_sge[1].length = PAGE_SIZE;
 229                 priv->rx_sge[1].lkey = priv->mr->lkey;
 230                 priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
 231         } else {
 232                 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
 233                 priv->rx_wr.num_sge = 1;
 234         }
 235         priv->rx_wr.next = NULL;
 236         priv->rx_wr.sg_list = priv->rx_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_free_mr:
 247         ib_dereg_mr(priv->mr);
 248         ipoib_cm_dev_cleanup(dev);
 249
 250 out_free_pd:
 251         ib_dealloc_pd(priv->pd);
 252         return -ENODEV;
 253 }
 254
 255 void ipoib_transport_dev_cleanup(struct net_device *dev)
 256 {
 257         struct ipoib_dev_priv *priv = netdev_priv(dev);
 258
 259         if (priv->qp) {
 260                 if (ib_destroy_qp(priv->qp))
 261                         ipoib_warn(priv, "ib_qp_destroy failed\n");
 262
 263                 priv->qp = NULL;
 264                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 265         }
 266
 267         if (ib_destroy_cq(priv->send_cq))
 268                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
 269
 270         if (ib_destroy_cq(priv->recv_cq))
 271                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
 272
 273         ipoib_cm_dev_cleanup(dev);
 274
 275         if (ib_dereg_mr(priv->mr))
 276                 ipoib_warn(priv, "ib_dereg_mr failed\n");
 277
 278         if (ib_dealloc_pd(priv->pd))
 279                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
 280 }
 281
 282 void ipoib_event(struct ib_event_handler *handler,
 283                  struct ib_event *record)
 284 {
 285         struct ipoib_dev_priv *priv =
 286                 container_of(handler, struct ipoib_dev_priv, event_handler);
 287
 288         if (record->element.port_num != priv->port)
 289                 return;
 290
 291         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
 292                   record->device->name, record->element.port_num);
 293
 294         if (record->event == IB_EVENT_SM_CHANGE ||
 295             record->event == IB_EVENT_CLIENT_REREGISTER) {
 296                 queue_work(ipoib_workqueue, &priv->flush_light);
 297         } else if (record->event == IB_EVENT_PORT_ERR ||
 298                    record->event == IB_EVENT_PORT_ACTIVE ||
 299                    record->event == IB_EVENT_LID_CHANGE) {
 300                 queue_work(ipoib_workqueue, &priv->flush_normal);
 301         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
 302                 queue_work(ipoib_workqueue, &priv->flush_heavy);
 303         }
 304 }