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 record->event == IB_EVENT_CLIENT_REREGISTER) { 260 ipoib_dbg(priv, "Port state change event\n"); 261 queue_work(ipoib_workqueue, &priv->flush_task); 262 } 263 } 264