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 <rdma/ib_cache.h>
  37
  38 #include "ipoib.h"
  39
  40 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
  41 {
  42         struct ipoib_dev_priv *priv = netdev_priv(dev);
  43         struct ib_qp_attr *qp_attr;
  44         int ret;
  45         u16 pkey_index;
  46
  47         ret = -ENOMEM;
  48         qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
  49         if (!qp_attr)
  50                 goto out;
  51
  52         if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
  53                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  54                 ret = -ENXIO;
  55                 goto out;
  56         }
  57         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
  58
  59         /* set correct QKey for QP */
  60         qp_attr->qkey = priv->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         /* attach QP to multicast group */
  68         mutex_lock(&priv->mcast_mutex);
  69         ret = ib_attach_mcast(priv->qp, mgid, mlid);
  70         mutex_unlock(&priv->mcast_mutex);
  71         if (ret)
  72                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
  73
  74 out:
  75         kfree(qp_attr);
  76         return ret;
  77 }
  78
  79 int ipoib_mcast_detach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
  80 {
  81         struct ipoib_dev_priv *priv = netdev_priv(dev);
  82         int ret;
  83
  84         mutex_lock(&priv->mcast_mutex);
  85         ret = ib_detach_mcast(priv->qp, mgid, mlid);
  86         mutex_unlock(&priv->mcast_mutex);
  87         if (ret)
  88                 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
  89
  90         return ret;
  91 }
  92
  93 int ipoib_init_qp(struct net_device *dev)
  94 {
  95         struct ipoib_dev_priv *priv = netdev_priv(dev);
  96         int ret;
  97         u16 pkey_index;
  98         struct ib_qp_attr qp_attr;
  99         int attr_mask;
 100
 101         /*
 102          * Search through the port P_Key table for the requested pkey value.
 103          * The port has to be assigned to the respective IB partition in
 104          * advance.
 105          */
 106         ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index);
 107         if (ret) {
 108                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 109                 return ret;
 110         }
 111         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 112
 113         qp_attr.qp_state = IB_QPS_INIT;
 114         qp_attr.qkey = 0;
 115         qp_attr.port_num = priv->port;
 116         qp_attr.pkey_index = pkey_index;
 117         attr_mask =
 118             IB_QP_QKEY |
 119             IB_QP_PORT |
 120             IB_QP_PKEY_INDEX |
 121             IB_QP_STATE;
 122         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 123         if (ret) {
 124                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
 125                 goto out_fail;
 126         }
 127
 128         qp_attr.qp_state = IB_QPS_RTR;
 129         /* Can't set this in a INIT->RTR transition */
 130         attr_mask &= ~IB_QP_PORT;
 131         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 132         if (ret) {
 133                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
 134                 goto out_fail;
 135         }
 136
 137         qp_attr.qp_state = IB_QPS_RTS;
 138         qp_attr.sq_psn = 0;
 139         attr_mask |= IB_QP_SQ_PSN;
 140         attr_mask &= ~IB_QP_PKEY_INDEX;
 141         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
 142         if (ret) {
 143                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
 144                 goto out_fail;
 145         }
 146
 147         return 0;
 148
 149 out_fail:
 150         qp_attr.qp_state = IB_QPS_RESET;
 151         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 152                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 153
 154         return ret;
 155 }
 156
 157 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
 158 {
 159         struct ipoib_dev_priv *priv = netdev_priv(dev);
 160         struct ib_qp_init_attr init_attr = {
 161                 .cap = {
 162                         .max_send_wr  = ipoib_sendq_size,
 163                         .max_recv_wr  = ipoib_recvq_size,
 164                         .max_send_sge = 1,
 165                         .max_recv_sge = 1
 166                 },
 167                 .sq_sig_type = IB_SIGNAL_ALL_WR,
 168                 .qp_type     = IB_QPT_UD
 169         };
 170
 171         priv->pd = ib_alloc_pd(priv->ca);
 172         if (IS_ERR(priv->pd)) {
 173                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
 174                 return -ENODEV;
 175         }
 176
 177         priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev,
 178                                 ipoib_sendq_size + ipoib_recvq_size + 1);
 179         if (IS_ERR(priv->cq)) {
 180                 printk(KERN_WARNING "%s: failed to create CQ\n", ca->name);
 181                 goto out_free_pd;
 182         }
 183
 184         if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP))
 185                 goto out_free_cq;
 186
 187         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
 188         if (IS_ERR(priv->mr)) {
 189                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
 190                 goto out_free_cq;
 191         }
 192
 193         init_attr.send_cq = priv->cq;
 194         init_attr.recv_cq = priv->cq,
 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_mr;
 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         priv->tx_sge.lkey       = priv->mr->lkey;
 207
 208         priv->tx_wr.opcode      = IB_WR_SEND;
 209         priv->tx_wr.sg_list     = &priv->tx_sge;
 210         priv->tx_wr.num_sge     = 1;
 211         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
 212
 213         return 0;
 214
 215 out_free_mr:
 216         ib_dereg_mr(priv->mr);
 217
 218 out_free_cq:
 219         ib_destroy_cq(priv->cq);
 220
 221 out_free_pd:
 222         ib_dealloc_pd(priv->pd);
 223         return -ENODEV;
 224 }
 225
 226 void ipoib_transport_dev_cleanup(struct net_device *dev)
 227 {
 228         struct ipoib_dev_priv *priv = netdev_priv(dev);
 229
 230         if (priv->qp) {
 231                 if (ib_destroy_qp(priv->qp))
 232                         ipoib_warn(priv, "ib_qp_destroy failed\n");
 233
 234                 priv->qp = NULL;
 235                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 236         }
 237
 238         if (ib_dereg_mr(priv->mr))
 239                 ipoib_warn(priv, "ib_dereg_mr failed\n");
 240
 241         if (ib_destroy_cq(priv->cq))
 242                 ipoib_warn(priv, "ib_cq_destroy failed\n");
 243
 244         if (ib_dealloc_pd(priv->pd))
 245                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
 246 }
 247
 248 void ipoib_event(struct ib_event_handler *handler,
 249                  struct ib_event *record)
 250 {
 251         struct ipoib_dev_priv *priv =
 252                 container_of(handler, struct ipoib_dev_priv, event_handler);
 253
 254         if (record->event == IB_EVENT_PORT_ERR    ||
 255             record->event == IB_EVENT_PKEY_CHANGE ||
 256             record->event == IB_EVENT_PORT_ACTIVE ||
 257             record->event == IB_EVENT_LID_CHANGE  ||
 258             record->event == IB_EVENT_SM_CHANGE) {
 259                 ipoib_dbg(priv, "Port state change event\n");
 260                 queue_work(ipoib_workqueue, &priv->flush_task);
 261         }
 262 }