ipoib_verbs.c revision 331769
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 36int ipoib_mcast_attach(struct ipoib_dev_priv *priv, u16 mlid, union ib_gid *mgid, int set_qkey) 37{ 38 struct ib_qp_attr *qp_attr = NULL; 39 int ret; 40 u16 pkey_index; 41 42 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) { 43 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 44 ret = -ENXIO; 45 goto out; 46 } 47 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 48 49 if (set_qkey) { 50 ret = -ENOMEM; 51 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); 52 if (!qp_attr) 53 goto out; 54 55 /* set correct QKey for QP */ 56 qp_attr->qkey = priv->qkey; 57 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY); 58 if (ret) { 59 ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret); 60 goto out; 61 } 62 } 63 64 /* attach QP to multicast group */ 65 ret = ib_attach_mcast(priv->qp, mgid, mlid); 66 if (ret) 67 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret); 68 69out: 70 kfree(qp_attr); 71 return ret; 72} 73 74int ipoib_init_qp(struct ipoib_dev_priv *priv) 75{ 76 int ret; 77 struct ib_qp_attr qp_attr; 78 int attr_mask; 79 80 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 81 return -1; 82 83 qp_attr.qp_state = IB_QPS_INIT; 84 qp_attr.qkey = 0; 85 qp_attr.port_num = priv->port; 86 qp_attr.pkey_index = priv->pkey_index; 87 attr_mask = 88 IB_QP_QKEY | 89 IB_QP_PORT | 90 IB_QP_PKEY_INDEX | 91 IB_QP_STATE; 92 93 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 94 if (ret) { 95 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret); 96 goto out_fail; 97 } 98 99 qp_attr.qp_state = IB_QPS_RTR; 100 /* Can't set this in a INIT->RTR transition */ 101 attr_mask &= ~IB_QP_PORT; 102 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 103 if (ret) { 104 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret); 105 goto out_fail; 106 } 107 108 qp_attr.qp_state = IB_QPS_RTS; 109 qp_attr.sq_psn = 0; 110 attr_mask |= IB_QP_SQ_PSN; 111 attr_mask &= ~IB_QP_PKEY_INDEX; 112 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 113 if (ret) { 114 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret); 115 goto out_fail; 116 } 117 118 return 0; 119 120out_fail: 121 qp_attr.qp_state = IB_QPS_RESET; 122 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 123 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 124 125 return ret; 126} 127 128int ipoib_transport_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca) 129{ 130 struct ib_qp_init_attr init_attr = { 131 .cap = { 132 .max_send_wr = ipoib_sendq_size, 133 .max_recv_wr = ipoib_recvq_size, 134 .max_send_sge = 1, 135 .max_recv_sge = IPOIB_UD_RX_SG 136 }, 137 .sq_sig_type = IB_SIGNAL_ALL_WR, 138 .qp_type = IB_QPT_UD 139 }; 140 struct ib_cq_init_attr cq_attr = {}; 141 142 int ret, size; 143 int i; 144 /* XXX struct ethtool_coalesce *coal; */ 145 146 priv->pd = ib_alloc_pd(priv->ca, 0); 147 if (IS_ERR(priv->pd)) { 148 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name); 149 return -ENODEV; 150 } 151 152 size = ipoib_recvq_size + 1; 153 ret = ipoib_cm_dev_init(priv); 154 if (!ret) { 155 size += ipoib_sendq_size; 156 if (ipoib_cm_has_srq(priv)) 157 size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */ 158 else 159 size += ipoib_recvq_size * ipoib_max_conn_qp; 160 } 161 162 cq_attr.cqe = size; 163 priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, priv, &cq_attr); 164 if (IS_ERR(priv->recv_cq)) { 165 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name); 166 goto out_free_mr; 167 } 168 169 cq_attr.cqe = ipoib_sendq_size; 170 priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL, 171 priv, &cq_attr); 172 if (IS_ERR(priv->send_cq)) { 173 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name); 174 goto out_free_recv_cq; 175 } 176 177 if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP)) 178 goto out_free_send_cq; 179 180#if 0 181 /* XXX */ 182 coal = kzalloc(sizeof *coal, GFP_KERNEL); 183 if (coal) { 184 coal->rx_coalesce_usecs = 10; 185 coal->tx_coalesce_usecs = 10; 186 coal->rx_max_coalesced_frames = 16; 187 coal->tx_max_coalesced_frames = 16; 188 dev->ethtool_ops->set_coalesce(dev, coal); 189 kfree(coal); 190 } 191#endif 192 193 init_attr.send_cq = priv->send_cq; 194 init_attr.recv_cq = priv->recv_cq; 195 196 if (priv->hca_caps & IB_DEVICE_UD_TSO) 197 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; 198 199 if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK) 200 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; 201 202 init_attr.cap.max_send_sge = IPOIB_UD_TX_SG; 203 204 priv->qp = ib_create_qp(priv->pd, &init_attr); 205 if (IS_ERR(priv->qp)) { 206 printk(KERN_WARNING "%s: failed to create QP\n", ca->name); 207 goto out_free_send_cq; 208 } 209 210 IF_LLADDR(priv->dev)[1] = (priv->qp->qp_num >> 16) & 0xff; 211 IF_LLADDR(priv->dev)[2] = (priv->qp->qp_num >> 8) & 0xff; 212 IF_LLADDR(priv->dev)[3] = (priv->qp->qp_num ) & 0xff; 213 214 for (i = 0; i < IPOIB_MAX_TX_SG; ++i) 215 priv->tx_sge[i].lkey = priv->pd->local_dma_lkey; 216 217 priv->tx_wr.wr.opcode = IB_WR_SEND; 218 priv->tx_wr.wr.sg_list = priv->tx_sge; 219 priv->tx_wr.wr.send_flags = IB_SEND_SIGNALED; 220 221 for (i = 0; i < IPOIB_UD_RX_SG; ++i) 222 priv->rx_sge[i].lkey = priv->pd->local_dma_lkey; 223 priv->rx_wr.next = NULL; 224 priv->rx_wr.sg_list = priv->rx_sge; 225 226 return 0; 227 228out_free_send_cq: 229 ib_destroy_cq(priv->send_cq); 230 231out_free_recv_cq: 232 ib_destroy_cq(priv->recv_cq); 233 234out_free_mr: 235 ipoib_cm_dev_cleanup(priv); 236 237 ib_dealloc_pd(priv->pd); 238 return -ENODEV; 239} 240 241void ipoib_transport_dev_cleanup(struct ipoib_dev_priv *priv) 242{ 243 244 if (priv->qp) { 245 if (ib_destroy_qp(priv->qp)) 246 ipoib_warn(priv, "ib_qp_destroy failed\n"); 247 248 priv->qp = NULL; 249 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 250 } 251 252 if (ib_destroy_cq(priv->send_cq)) 253 ipoib_warn(priv, "ib_cq_destroy (send) failed\n"); 254 255 if (ib_destroy_cq(priv->recv_cq)) 256 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n"); 257 258 ipoib_cm_dev_cleanup(priv); 259 260 ib_dealloc_pd(priv->pd); 261} 262 263void ipoib_event(struct ib_event_handler *handler, 264 struct ib_event *record) 265{ 266 struct ipoib_dev_priv *priv = 267 container_of(handler, struct ipoib_dev_priv, event_handler); 268 269 if (record->element.port_num != priv->port) 270 return; 271 272 ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event, 273 record->device->name, record->element.port_num); 274 275 if (record->event == IB_EVENT_SM_CHANGE || 276 record->event == IB_EVENT_CLIENT_REREGISTER) { 277 queue_work(ipoib_workqueue, &priv->flush_light); 278 } else if (record->event == IB_EVENT_PORT_ERR || 279 record->event == IB_EVENT_PORT_ACTIVE || 280 record->event == IB_EVENT_LID_CHANGE) { 281 queue_work(ipoib_workqueue, &priv->flush_normal); 282 } else if (record->event == IB_EVENT_PKEY_CHANGE) { 283 queue_work(ipoib_workqueue, &priv->flush_heavy); 284 } 285} 286