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_init_qp(struct net_device *dev)
  76 {
  77         struct ipoib_dev_priv *priv = netdev_priv(dev);
  78         int ret;
  79         struct ib_qp_attr qp_attr;
  80         int attr_mask;
  81
  82         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
  83                 return -1;
  84
  85         qp_attr.qp_state = IB_QPS_INIT;
  86         qp_attr.qkey = 0;
  87         qp_attr.port_num = priv->port;
  88         qp_attr.pkey_index = priv->pkey_index;
  89         attr_mask =
  90             IB_QP_QKEY |
  91             IB_QP_PORT |
  92             IB_QP_PKEY_INDEX |
  93             IB_QP_STATE;
  94         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
  95         if (ret) {
  96                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
  97                 goto out_fail;
  98         }
  99
 100         qp_attr.qp_state = IB_QPS_RTR;
 101         /* Can't set this in a INIT->RTR transition */
 102         attr_mask &= ~IB_QP_PORT;
 103         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 104         if (ret) {
 105                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
 106                 goto out_fail;
 107         }
 108
 109         qp_attr.qp_state = IB_QPS_RTS;
 110         qp_attr.sq_psn = 0;
 111         attr_mask |= IB_QP_SQ_PSN;
 112         attr_mask &= ~IB_QP_PKEY_INDEX;
 113         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 114         if (ret) {
 115                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
 116                 goto out_fail;
 117         }
 118
 119         return 0;
 120
 121 out_fail:
 122         qp_attr.qp_state = IB_QPS_RESET;
 123         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 124                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 125
 126         return ret;
 127 }
 128
 129 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
 130 {
 131         struct ipoib_dev_priv *priv = netdev_priv(dev);
 132         struct ib_qp_init_attr init_attr = {
 133                 .cap = {
 134                         .max_send_wr  = ipoib_sendq_size,
 135                         .max_recv_wr  = ipoib_recvq_size,
 136                         .max_send_sge = 1,
 137                         .max_recv_sge = IPOIB_UD_RX_SG
 138                 },
 139                 .sq_sig_type = IB_SIGNAL_ALL_WR,
 140                 .qp_type     = IB_QPT_UD
 141         };
 142
 143         int ret, size;
 144         int i;
 145
 146         priv->pd = ib_alloc_pd(priv->ca);
 147         if (IS_ERR(priv->pd)) {
 148                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
 149                 return -ENODEV;
 150         }
 151
 152         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
 153         if (IS_ERR(priv->mr)) {
 154                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
 155                 goto out_free_pd;
 156         }
 157
 158         size = ipoib_recvq_size + 1;
 159         ret = ipoib_cm_dev_init(dev);
 160         if (!ret) {
 161                 size += ipoib_sendq_size;
 162                 if (ipoib_cm_has_srq(dev))
 163                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
 164                 else
 165                         size += ipoib_recvq_size * ipoib_max_conn_qp;
 166         }
 167
 168         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
 169         if (IS_ERR(priv->recv_cq)) {
 170                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
 171                 goto out_free_mr;
 172         }
 173
 174         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
 175                                      dev, ipoib_sendq_size, 0);
 176         if (IS_ERR(priv->send_cq)) {
 177                 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
 178                 goto out_free_recv_cq;
 179         }
 180
 181         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
 182                 goto out_free_send_cq;
 183
 184         init_attr.send_cq = priv->send_cq;
 185         init_attr.recv_cq = priv->recv_cq;
 186
 187         if (priv->hca_caps & IB_DEVICE_UD_TSO)
 188                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
 189
 190         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
 191                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
 192
 193         if (dev->features & NETIF_F_SG)
 194                 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
 195
 196         priv->qp = ib_create_qp(priv->pd, &init_attr);
 197         if (IS_ERR(priv->qp)) {
 198                 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
 199                 goto out_free_send_cq;
 200         }
 201
 202         priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
 203         priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
 204         priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;
 205
 206         for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
 207                 priv->tx_sge[i].lkey = priv->mr->lkey;
 208
 209         priv->tx_wr.opcode      = IB_WR_SEND;
 210         priv->tx_wr.sg_list     = priv->tx_sge;
 211         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
 212
 213         priv->rx_sge[0].lkey = priv->mr->lkey;
 214         if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
 215                 priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
 216                 priv->rx_sge[1].length = PAGE_SIZE;
 217                 priv->rx_sge[1].lkey = priv->mr->lkey;
 218                 priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
 219         } else {
 220                 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
 221                 priv->rx_wr.num_sge = 1;
 222         }
 223         priv->rx_wr.next = NULL;
 224         priv->rx_wr.sg_list = priv->rx_sge;
 225
 226         return 0;
 227
 228 out_free_send_cq:
 229         ib_destroy_cq(priv->send_cq);
 230
 231 out_free_recv_cq:
 232         ib_destroy_cq(priv->recv_cq);
 233
 234 out_free_mr:
 235         ib_dereg_mr(priv->mr);
 236         ipoib_cm_dev_cleanup(dev);
 237
 238 out_free_pd:
 239         ib_dealloc_pd(priv->pd);
 240         return -ENODEV;
 241 }
 242
 243 void ipoib_transport_dev_cleanup(struct net_device *dev)
 244 {
 245         struct ipoib_dev_priv *priv = netdev_priv(dev);
 246
 247         if (priv->qp) {
 248                 if (ib_destroy_qp(priv->qp))
 249                         ipoib_warn(priv, "ib_qp_destroy failed\n");
 250
 251                 priv->qp = NULL;
 252                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 253         }
 254
 255         if (ib_destroy_cq(priv->send_cq))
 256                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
 257
 258         if (ib_destroy_cq(priv->recv_cq))
 259                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
 260
 261         ipoib_cm_dev_cleanup(dev);
 262
 263         if (ib_dereg_mr(priv->mr))
 264                 ipoib_warn(priv, "ib_dereg_mr failed\n");
 265
 266         if (ib_dealloc_pd(priv->pd))
 267                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
 268 }
 269
 270 void ipoib_event(struct ib_event_handler *handler,
 271                  struct ib_event *record)
 272 {
 273         struct ipoib_dev_priv *priv =
 274                 container_of(handler, struct ipoib_dev_priv, event_handler);
 275
 276         if (record->element.port_num != priv->port)
 277                 return;
 278
 279         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
 280                   record->device->name, record->element.port_num);
 281
 282         if (record->event == IB_EVENT_SM_CHANGE ||
 283             record->event == IB_EVENT_CLIENT_REREGISTER) {
 284                 queue_work(ipoib_workqueue, &priv->flush_light);
 285         } else if (record->event == IB_EVENT_PORT_ERR ||
 286                    record->event == IB_EVENT_PORT_ACTIVE ||
 287                    record->event == IB_EVENT_LID_CHANGE) {
 288                 queue_work(ipoib_workqueue, &priv->flush_normal);
 289         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
 290                 queue_work(ipoib_workqueue, &priv->flush_heavy);
 291         }
 292 }