1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <sys/cdefs.h> 37 #include "ipoib.h" 38 39 int ipoib_mcast_attach(struct ipoib_dev_priv *priv, u16 mlid, union ib_gid *mgid, int set_qkey) 40 { 41 struct ib_qp_attr *qp_attr = NULL; 42 int ret; 43 u16 pkey_index; 44 45 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) { 46 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 47 ret = -ENXIO; 48 goto out; 49 } 50 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 51 52 if (set_qkey) { 53 ret = -ENOMEM; 54 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); 55 if (!qp_attr) 56 goto out; 57 58 /* set correct QKey for QP */ 59 qp_attr->qkey = priv->qkey; 60 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY); 61 if (ret) { 62 ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret); 63 goto out; 64 } 65 } 66 67 /* attach QP to multicast group */ 68 ret = ib_attach_mcast(priv->qp, mgid, mlid); 69 if (ret) 70 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret); 71 72 out: 73 kfree(qp_attr); 74 return ret; 75 } 76 77 int ipoib_init_qp(struct ipoib_dev_priv *priv) 78 { 79 int ret; 80 struct ib_qp_attr qp_attr; 81 int attr_mask; 82 83 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 84 return -1; 85 86 qp_attr.qp_state = IB_QPS_INIT; 87 qp_attr.qkey = 0; 88 qp_attr.port_num = priv->port; 89 qp_attr.pkey_index = priv->pkey_index; 90 attr_mask = 91 IB_QP_QKEY | 92 IB_QP_PORT | 93 IB_QP_PKEY_INDEX | 94 IB_QP_STATE; 95 96 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 97 if (ret) { 98 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret); 99 goto out_fail; 100 } 101 102 qp_attr.qp_state = IB_QPS_RTR; 103 /* Can't set this in a INIT->RTR transition */ 104 attr_mask &= ~IB_QP_PORT; 105 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 106 if (ret) { 107 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret); 108 goto out_fail; 109 } 110 111 qp_attr.qp_state = IB_QPS_RTS; 112 qp_attr.sq_psn = 0; 113 attr_mask |= IB_QP_SQ_PSN; 114 attr_mask &= ~IB_QP_PKEY_INDEX; 115 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask); 116 if (ret) { 117 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret); 118 goto out_fail; 119 } 120 121 return 0; 122 123 out_fail: 124 qp_attr.qp_state = IB_QPS_RESET; 125 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 126 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 127 128 return ret; 129 } 130 131 int ipoib_transport_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca) 132 { 133 struct ib_qp_init_attr init_attr = { 134 .cap = { 135 .max_send_wr = ipoib_sendq_size, 136 .max_recv_wr = ipoib_recvq_size, 137 .max_send_sge = 1, 138 .max_recv_sge = IPOIB_UD_RX_SG 139 }, 140 .sq_sig_type = IB_SIGNAL_ALL_WR, 141 .qp_type = IB_QPT_UD 142 }; 143 struct ib_cq_init_attr cq_attr = {}; 144 caddr_t lla; 145 146 int ret, size; 147 int i; 148 /* XXX struct ethtool_coalesce *coal; */ 149 150 priv->pd = ib_alloc_pd(priv->ca, 0); 151 if (IS_ERR(priv->pd)) { 152 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name); 153 return -ENODEV; 154 } 155 156 size = ipoib_recvq_size + 1; 157 ret = ipoib_cm_dev_init(priv); 158 if (!ret) { 159 size += ipoib_sendq_size; 160 if (ipoib_cm_has_srq(priv)) 161 size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */ 162 else 163 size += ipoib_recvq_size * ipoib_max_conn_qp; 164 } 165 166 cq_attr.cqe = size; 167 priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, priv, &cq_attr); 168 if (IS_ERR(priv->recv_cq)) { 169 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name); 170 goto out_free_mr; 171 } 172 173 cq_attr.cqe = ipoib_sendq_size; 174 priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL, 175 priv, &cq_attr); 176 if (IS_ERR(priv->send_cq)) { 177 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name); 178 goto out_free_recv_cq; 179 } 180 181 if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP)) 182 goto out_free_send_cq; 183 184 #if 0 185 /* XXX */ 186 coal = kzalloc(sizeof *coal, GFP_KERNEL); 187 if (coal) { 188 coal->rx_coalesce_usecs = 10; 189 coal->tx_coalesce_usecs = 10; 190 coal->rx_max_coalesced_frames = 16; 191 coal->tx_max_coalesced_frames = 16; 192 dev->ethtool_ops->set_coalesce(dev, coal); 193 kfree(coal); 194 } 195 #endif 196 197 init_attr.send_cq = priv->send_cq; 198 init_attr.recv_cq = priv->recv_cq; 199 200 if (priv->hca_caps & IB_DEVICE_UD_TSO) 201 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; 202 203 if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK) 204 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; 205 206 init_attr.cap.max_send_sge = IPOIB_UD_TX_SG; 207 208 priv->qp = ib_create_qp(priv->pd, &init_attr); 209 if (IS_ERR(priv->qp)) { 210 printk(KERN_WARNING "%s: failed to create QP\n", ca->name); 211 goto out_free_send_cq; 212 } 213 214 lla = if_getlladdr(priv->dev); 215 lla[1] = (priv->qp->qp_num >> 16) & 0xff; 216 lla[2] = (priv->qp->qp_num >> 8) & 0xff; 217 lla[3] = (priv->qp->qp_num ) & 0xff; 218 219 for (i = 0; i < IPOIB_MAX_TX_SG; ++i) 220 priv->tx_sge[i].lkey = priv->pd->local_dma_lkey; 221 222 priv->tx_wr.wr.opcode = IB_WR_SEND; 223 priv->tx_wr.wr.sg_list = priv->tx_sge; 224 priv->tx_wr.wr.send_flags = IB_SEND_SIGNALED; 225 226 for (i = 0; i < IPOIB_UD_RX_SG; ++i) 227 priv->rx_sge[i].lkey = priv->pd->local_dma_lkey; 228 priv->rx_wr.next = NULL; 229 priv->rx_wr.sg_list = priv->rx_sge; 230 231 return 0; 232 233 out_free_send_cq: 234 ib_destroy_cq(priv->send_cq); 235 236 out_free_recv_cq: 237 ib_destroy_cq(priv->recv_cq); 238 239 out_free_mr: 240 ipoib_cm_dev_cleanup(priv); 241 242 ib_dealloc_pd(priv->pd); 243 return -ENODEV; 244 } 245 246 void ipoib_transport_dev_cleanup(struct ipoib_dev_priv *priv) 247 { 248 249 if (priv->qp) { 250 if (ib_destroy_qp(priv->qp)) 251 ipoib_warn(priv, "ib_qp_destroy failed\n"); 252 253 priv->qp = NULL; 254 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 255 } 256 257 ib_destroy_cq(priv->send_cq); 258 259 ib_destroy_cq(priv->recv_cq); 260 261 ipoib_cm_dev_cleanup(priv); 262 263 ib_dealloc_pd(priv->pd); 264 } 265 266 void ipoib_event(struct ib_event_handler *handler, 267 struct ib_event *record) 268 { 269 struct ipoib_dev_priv *priv = 270 container_of(handler, struct ipoib_dev_priv, event_handler); 271 272 if (record->element.port_num != priv->port) 273 return; 274 275 ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event, 276 record->device->name, record->element.port_num); 277 278 if (record->event == IB_EVENT_SM_CHANGE || 279 record->event == IB_EVENT_CLIENT_REREGISTER) { 280 queue_work(ipoib_workqueue, &priv->flush_light); 281 } else if (record->event == IB_EVENT_PORT_ERR || 282 record->event == IB_EVENT_PORT_ACTIVE || 283 record->event == IB_EVENT_LID_CHANGE || 284 record->event == IB_EVENT_DEVICE_FATAL) { 285 queue_work(ipoib_workqueue, &priv->flush_normal); 286 } else if (record->event == IB_EVENT_PKEY_CHANGE) { 287 queue_work(ipoib_workqueue, &priv->flush_heavy); 288 } 289 } 290