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 int ret, size; 172 173 priv->pd = ib_alloc_pd(priv->ca); 174 if (IS_ERR(priv->pd)) { 175 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name); 176 return -ENODEV; 177 } 178 179 priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE); 180 if (IS_ERR(priv->mr)) { 181 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name); 182 goto out_free_pd; 183 } 184 185 size = ipoib_sendq_size + ipoib_recvq_size + 1; 186 ret = ipoib_cm_dev_init(dev); 187 if (!ret) 188 size += ipoib_recvq_size; 189 190 priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size); 191 if (IS_ERR(priv->cq)) { 192 printk(KERN_WARNING "%s: failed to create CQ\n", ca->name); 193 goto out_free_mr; 194 } 195 196 if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP)) 197 goto out_free_cq; 198 199 init_attr.send_cq = priv->cq; 200 init_attr.recv_cq = priv->cq, 201 202 priv->qp = ib_create_qp(priv->pd, &init_attr); 203 if (IS_ERR(priv->qp)) { 204 printk(KERN_WARNING "%s: failed to create QP\n", ca->name); 205 goto out_free_cq; 206 } 207 208 priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff; 209 priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff; 210 priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff; 211 212 priv->tx_sge.lkey = priv->mr->lkey; 213 214 priv->tx_wr.opcode = IB_WR_SEND; 215 priv->tx_wr.sg_list = &priv->tx_sge; 216 priv->tx_wr.num_sge = 1; 217 priv->tx_wr.send_flags = IB_SEND_SIGNALED; 218 219 return 0; 220 221 out_free_cq: 222 ib_destroy_cq(priv->cq); 223 224 out_free_mr: 225 ib_dereg_mr(priv->mr); 226 227 out_free_pd: 228 ib_dealloc_pd(priv->pd); 229 return -ENODEV; 230 } 231 232 void ipoib_transport_dev_cleanup(struct net_device *dev) 233 { 234 struct ipoib_dev_priv *priv = netdev_priv(dev); 235 236 if (priv->qp) { 237 if (ib_destroy_qp(priv->qp)) 238 ipoib_warn(priv, "ib_qp_destroy failed\n"); 239 240 priv->qp = NULL; 241 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 242 } 243 244 if (ib_destroy_cq(priv->cq)) 245 ipoib_warn(priv, "ib_cq_destroy failed\n"); 246 247 ipoib_cm_dev_cleanup(dev); 248 249 if (ib_dereg_mr(priv->mr)) 250 ipoib_warn(priv, "ib_dereg_mr failed\n"); 251 252 if (ib_dealloc_pd(priv->pd)) 253 ipoib_warn(priv, "ib_dealloc_pd failed\n"); 254 } 255 256 void ipoib_event(struct ib_event_handler *handler, 257 struct ib_event *record) 258 { 259 struct ipoib_dev_priv *priv = 260 container_of(handler, struct ipoib_dev_priv, event_handler); 261 262 if ((record->event == IB_EVENT_PORT_ERR || 263 record->event == IB_EVENT_PKEY_CHANGE || 264 record->event == IB_EVENT_PORT_ACTIVE || 265 record->event == IB_EVENT_LID_CHANGE || 266 record->event == IB_EVENT_SM_CHANGE || 267 record->event == IB_EVENT_CLIENT_REREGISTER) && 268 record->element.port_num == priv->port) { 269 ipoib_dbg(priv, "Port state change event\n"); 270 queue_work(ipoib_workqueue, &priv->flush_task); 271 } 272 } 273