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 attr_mask; 45 int ret; 46 u16 pkey_index; 47 48 ret = -ENOMEM; 49 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); 50 if (!qp_attr) 51 goto out; 52 53 if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) { 54 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 55 ret = -ENXIO; 56 goto out; 57 } 58 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 59 60 /* set correct QKey for QP */ 61 qp_attr->qkey = priv->qkey; 62 attr_mask = IB_QP_QKEY; 63 ret = ib_modify_qp(priv->qp, qp_attr, attr_mask); 64 if (ret) { 65 ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret); 66 goto out; 67 } 68 69 /* attach QP to multicast group */ 70 down(&priv->mcast_mutex); 71 ret = ib_attach_mcast(priv->qp, mgid, mlid); 72 up(&priv->mcast_mutex); 73 if (ret) 74 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret); 75 76 out: 77 kfree(qp_attr); 78 return ret; 79 } 80 81 int ipoib_mcast_detach(struct net_device *dev, u16 mlid, union ib_gid *mgid) 82 { 83 struct ipoib_dev_priv *priv = netdev_priv(dev); 84 int ret; 85 86 down(&priv->mcast_mutex); 87 ret = ib_detach_mcast(priv->qp, mgid, mlid); 88 up(&priv->mcast_mutex); 89 if (ret) 90 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); 91 92 return ret; 93 } 94 95 int ipoib_qp_create(struct net_device *dev) 96 { 97 struct ipoib_dev_priv *priv = netdev_priv(dev); 98 int ret; 99 u16 pkey_index; 100 struct ib_qp_attr qp_attr; 101 int attr_mask; 102 103 /* 104 * Search through the port P_Key table for the requested pkey value. 105 * The port has to be assigned to the respective IB partition in 106 * advance. 107 */ 108 ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index); 109 if (ret) { 110 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 111 return ret; 112 } 113 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 114 115 qp_attr.qp_state = IB_QPS_INIT; 116 qp_attr.qkey = 0; 117 qp_attr.port_num = priv->port; 118 qp_attr.pkey_index = pkey_index; 119 attr_mask = 120 IB_QP_QKEY | 121 IB_QP_PORT | 122 IB_QP_PKEY_INDEX | 123 IB_QP_STATE; 124 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 125 if (ret) { 126 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret); 127 goto out_fail; 128 } 129 130 qp_attr.qp_state = IB_QPS_RTR; 131 /* Can't set this in a INIT->RTR transition */ 132 attr_mask &= ~IB_QP_PORT; 133 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 134 if (ret) { 135 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret); 136 goto out_fail; 137 } 138 139 qp_attr.qp_state = IB_QPS_RTS; 140 qp_attr.sq_psn = 0; 141 attr_mask |= IB_QP_SQ_PSN; 142 attr_mask &= ~IB_QP_PKEY_INDEX; 143 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 144 if (ret) { 145 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret); 146 goto out_fail; 147 } 148 149 return 0; 150 151 out_fail: 152 ib_destroy_qp(priv->qp); 153 priv->qp = NULL; 154 155 return -EINVAL; 156 } 157 158 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca) 159 { 160 struct ipoib_dev_priv *priv = netdev_priv(dev); 161 struct ib_qp_init_attr init_attr = { 162 .cap = { 163 .max_send_wr = IPOIB_TX_RING_SIZE, 164 .max_recv_wr = IPOIB_RX_RING_SIZE, 165 .max_send_sge = 1, 166 .max_recv_sge = 1 167 }, 168 .sq_sig_type = IB_SIGNAL_ALL_WR, 169 .qp_type = IB_QPT_UD 170 }; 171 172 priv->pd = ib_alloc_pd(priv->ca); 173 if (IS_ERR(priv->pd)) { 174 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name); 175 return -ENODEV; 176 } 177 178 priv->cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, 179 IPOIB_TX_RING_SIZE + IPOIB_RX_RING_SIZE + 1); 180 if (IS_ERR(priv->cq)) { 181 printk(KERN_WARNING "%s: failed to create CQ\n", ca->name); 182 goto out_free_pd; 183 } 184 185 if (ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP)) 186 goto out_free_cq; 187 188 priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE); 189 if (IS_ERR(priv->mr)) { 190 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name); 191 goto out_free_cq; 192 } 193 194 init_attr.send_cq = priv->cq; 195 init_attr.recv_cq = priv->cq, 196 197 priv->qp = ib_create_qp(priv->pd, &init_attr); 198 if (IS_ERR(priv->qp)) { 199 printk(KERN_WARNING "%s: failed to create QP\n", ca->name); 200 goto out_free_mr; 201 } 202 203 priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff; 204 priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff; 205 priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff; 206 207 priv->tx_sge.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.num_sge = 1; 212 priv->tx_wr.send_flags = IB_SEND_SIGNALED; 213 214 return 0; 215 216 out_free_mr: 217 ib_dereg_mr(priv->mr); 218 219 out_free_cq: 220 ib_destroy_cq(priv->cq); 221 222 out_free_pd: 223 ib_dealloc_pd(priv->pd); 224 return -ENODEV; 225 } 226 227 void ipoib_transport_dev_cleanup(struct net_device *dev) 228 { 229 struct ipoib_dev_priv *priv = netdev_priv(dev); 230 231 if (priv->qp) { 232 if (ib_destroy_qp(priv->qp)) 233 ipoib_warn(priv, "ib_qp_destroy failed\n"); 234 235 priv->qp = NULL; 236 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 237 } 238 239 if (ib_dereg_mr(priv->mr)) 240 ipoib_warn(priv, "ib_dereg_mr failed\n"); 241 242 if (ib_destroy_cq(priv->cq)) 243 ipoib_warn(priv, "ib_cq_destroy failed\n"); 244 245 if (ib_dealloc_pd(priv->pd)) 246 ipoib_warn(priv, "ib_dealloc_pd failed\n"); 247 } 248 249 void ipoib_event(struct ib_event_handler *handler, 250 struct ib_event *record) 251 { 252 struct ipoib_dev_priv *priv = 253 container_of(handler, struct ipoib_dev_priv, event_handler); 254 255 if (record->event == IB_EVENT_PORT_ACTIVE || 256 record->event == IB_EVENT_LID_CHANGE || 257 record->event == IB_EVENT_SM_CHANGE) { 258 ipoib_dbg(priv, "Port active event\n"); 259 schedule_work(&priv->flush_task); 260 } 261 } 262