drivers/infiniband/hw/mlx4/main.c

   1 /*
   2  * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2007, 2008 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 <linux/module.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/errno.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/inetdevice.h>
  40 #include <linux/rtnetlink.h>
  41 #include <linux/if_vlan.h>
  42
  43 #include <rdma/ib_smi.h>
  44 #include <rdma/ib_user_verbs.h>
  45 #include <rdma/ib_addr.h>
  46
  47 #include <linux/mlx4/driver.h>
  48 #include <linux/mlx4/cmd.h>
  49
  50 #include "mlx4_ib.h"
  51 #include "user.h"
  52
  53 #define DRV_NAME        MLX4_IB_DRV_NAME
  54 #define DRV_VERSION     "1.0"
  55 #define DRV_RELDATE     "April 4, 2008"
  56
  57 MODULE_AUTHOR("Roland Dreier");
  58 MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
  59 MODULE_LICENSE("Dual BSD/GPL");
  60 MODULE_VERSION(DRV_VERSION);
  61
  62 int mlx4_ib_sm_guid_assign = 1;
  63 module_param_named(sm_guid_assign, mlx4_ib_sm_guid_assign, int, 0444);
  64 MODULE_PARM_DESC(sm_guid_assign, "Enable SM alias_GUID assignment if sm_guid_assign > 0 (Default: 1)");
  65
  66 static const char mlx4_ib_version[] =
  67         DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
  68         DRV_VERSION " (" DRV_RELDATE ")\n";
  69
  70 struct update_gid_work {
  71         struct work_struct      work;
  72         union ib_gid            gids[128];
  73         struct mlx4_ib_dev     *dev;
  74         int                     port;
  75 };
  76
  77 static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init);
  78
  79 static struct workqueue_struct *wq;
  80
  81 static void init_query_mad(struct ib_smp *mad)
  82 {
  83         mad->base_version  = 1;
  84         mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  85         mad->class_version = 1;
  86         mad->method        = IB_MGMT_METHOD_GET;
  87 }
  88
  89 static union ib_gid zgid;
  90
  91 static int mlx4_ib_query_device(struct ib_device *ibdev,
  92                                 struct ib_device_attr *props)
  93 {
  94         struct mlx4_ib_dev *dev = to_mdev(ibdev);
  95         struct ib_smp *in_mad  = NULL;
  96         struct ib_smp *out_mad = NULL;
  97         int err = -ENOMEM;
  98
  99         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 100         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 101         if (!in_mad || !out_mad)
 102                 goto out;
 103
 104         init_query_mad(in_mad);
 105         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
 106
 107         err = mlx4_MAD_IFC(to_mdev(ibdev), MLX4_MAD_IFC_IGNORE_KEYS,
 108                            1, NULL, NULL, in_mad, out_mad);
 109         if (err)
 110                 goto out;
 111
 112         memset(props, 0, sizeof *props);
 113
 114         props->fw_ver = dev->dev->caps.fw_ver;
 115         props->device_cap_flags    = IB_DEVICE_CHANGE_PHY_PORT |
 116                 IB_DEVICE_PORT_ACTIVE_EVENT             |
 117                 IB_DEVICE_SYS_IMAGE_GUID                |
 118                 IB_DEVICE_RC_RNR_NAK_GEN                |
 119                 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
 120         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR)
 121                 props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
 122         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR)
 123                 props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
 124         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_APM)
 125                 props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
 126         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
 127                 props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
 128         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
 129                 props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
 130         if (dev->dev->caps.max_gso_sz && dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BLH)
 131                 props->device_cap_flags |= IB_DEVICE_UD_TSO;
 132         if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_RESERVED_LKEY)
 133                 props->device_cap_flags |= IB_DEVICE_LOCAL_DMA_LKEY;
 134         if ((dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_LOCAL_INV) &&
 135             (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_REMOTE_INV) &&
 136             (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_FAST_REG_WR))
 137                 props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
 138         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)
 139                 props->device_cap_flags |= IB_DEVICE_XRC;
 140
 141         props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
 142                 0xffffff;
 143         props->vendor_part_id      = dev->dev->pdev->device;
 144         props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
 145         memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
 146
 147         props->max_mr_size         = ~0ull;
 148         props->page_size_cap       = dev->dev->caps.page_size_cap;
 149         props->max_qp              = dev->dev->caps.num_qps - dev->dev->caps.reserved_qps;
 150         props->max_qp_wr           = dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE;
 151         props->max_sge             = min(dev->dev->caps.max_sq_sg,
 152                                          dev->dev->caps.max_rq_sg);
 153         props->max_cq              = dev->dev->caps.num_cqs - dev->dev->caps.reserved_cqs;
 154         props->max_cqe             = dev->dev->caps.max_cqes;
 155         props->max_mr              = dev->dev->caps.num_mpts - dev->dev->caps.reserved_mrws;
 156         props->max_pd              = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
 157         props->max_qp_rd_atom      = dev->dev->caps.max_qp_dest_rdma;
 158         props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
 159         props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 160         props->max_srq             = dev->dev->caps.num_srqs - dev->dev->caps.reserved_srqs;
 161         props->max_srq_wr          = dev->dev->caps.max_srq_wqes - 1;
 162         props->max_srq_sge         = dev->dev->caps.max_srq_sge;
 163         props->max_fast_reg_page_list_len = MLX4_MAX_FAST_REG_PAGES;
 164         props->local_ca_ack_delay  = dev->dev->caps.local_ca_ack_delay;
 165         props->atomic_cap          = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
 166                 IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 167         props->masked_atomic_cap   = props->atomic_cap;
 168         props->max_pkeys           = dev->dev->caps.pkey_table_len[1];
 169         props->max_mcast_grp       = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
 170         props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
 171         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 172                                            props->max_mcast_grp;
 173         props->max_map_per_fmr = dev->dev->caps.max_fmr_maps;
 174
 175 out:
 176         kfree(in_mad);
 177         kfree(out_mad);
 178
 179         return err;
 180 }
 181
 182 static enum rdma_link_layer
 183 mlx4_ib_port_link_layer(struct ib_device *device, u8 port_num)
 184 {
 185         struct mlx4_dev *dev = to_mdev(device)->dev;
 186
 187         return dev->caps.port_mask[port_num] == MLX4_PORT_TYPE_IB ?
 188                 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
 189 }
 190
 191 static int ib_link_query_port(struct ib_device *ibdev, u8 port,
 192                               struct ib_port_attr *props, int netw_view)
 193 {
 194         struct ib_smp *in_mad  = NULL;
 195         struct ib_smp *out_mad = NULL;
 196         int ext_active_speed;
 197         int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
 198         int err = -ENOMEM;
 199
 200         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 201         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 202         if (!in_mad || !out_mad)
 203                 goto out;
 204
 205         init_query_mad(in_mad);
 206         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 207         in_mad->attr_mod = cpu_to_be32(port);
 208
 209         if (mlx4_is_mfunc(to_mdev(ibdev)->dev) && netw_view)
 210                 mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
 211
 212         err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
 213                                 in_mad, out_mad);
 214         if (err)
 215                 goto out;
 216
 217
 218         props->lid              = be16_to_cpup((__be16 *) (out_mad->data + 16));
 219         props->lmc              = out_mad->data[34] & 0x7;
 220         props->sm_lid           = be16_to_cpup((__be16 *) (out_mad->data + 18));
 221         props->sm_sl            = out_mad->data[36] & 0xf;
 222         props->state            = out_mad->data[32] & 0xf;
 223         props->phys_state       = out_mad->data[33] >> 4;
 224         props->port_cap_flags   = be32_to_cpup((__be32 *) (out_mad->data + 20));
 225         if (netw_view)
 226                 props->gid_tbl_len = out_mad->data[50];
 227         else
 228                 props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
 229         props->max_msg_sz       = to_mdev(ibdev)->dev->caps.max_msg_sz;
 230         props->pkey_tbl_len     = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
 231         props->bad_pkey_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 46));
 232         props->qkey_viol_cntr   = be16_to_cpup((__be16 *) (out_mad->data + 48));
 233         props->active_width     = out_mad->data[31] & 0xf;
 234         props->active_speed     = out_mad->data[35] >> 4;
 235         props->max_mtu          = out_mad->data[41] & 0xf;
 236         props->active_mtu       = out_mad->data[36] >> 4;
 237         props->subnet_timeout   = out_mad->data[51] & 0x1f;
 238         props->max_vl_num       = out_mad->data[37] >> 4;
 239         props->init_type_reply  = out_mad->data[41] >> 4;
 240
 241         /* Check if extended speeds (EDR/FDR/...) are supported */
 242         if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
 243                 ext_active_speed = out_mad->data[62] >> 4;
 244
 245                 switch (ext_active_speed) {
 246                 case 1:
 247                         props->active_speed = IB_SPEED_FDR;
 248                         break;
 249                 case 2:
 250                         props->active_speed = IB_SPEED_EDR;
 251                         break;
 252                 }
 253         }
 254
 255         /* If reported active speed is QDR, check if is FDR-10 */
 256         if (props->active_speed == IB_SPEED_QDR) {
 257                 init_query_mad(in_mad);
 258                 in_mad->attr_id = MLX4_ATTR_EXTENDED_PORT_INFO;
 259                 in_mad->attr_mod = cpu_to_be32(port);
 260
 261                 err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port,
 262                                    NULL, NULL, in_mad, out_mad);
 263                 if (err)
 264                         goto out;
 265
 266                 /* Checking LinkSpeedActive for FDR-10 */
 267                 if (out_mad->data[15] & 0x1)
 268                         props->active_speed = IB_SPEED_FDR10;
 269         }
 270
 271         /* Avoid wrong speed value returned by FW if the IB link is down. */
 272         if (props->state == IB_PORT_DOWN)
 273                  props->active_speed = IB_SPEED_SDR;
 274
 275 out:
 276         kfree(in_mad);
 277         kfree(out_mad);
 278         return err;
 279 }
 280
 281 static u8 state_to_phys_state(enum ib_port_state state)
 282 {
 283         return state == IB_PORT_ACTIVE ? 5 : 3;
 284 }
 285
 286 static int eth_link_query_port(struct ib_device *ibdev, u8 port,
 287                                struct ib_port_attr *props, int netw_view)
 288 {
 289
 290         struct mlx4_ib_dev *mdev = to_mdev(ibdev);
 291         struct mlx4_ib_iboe *iboe = &mdev->iboe;
 292         struct net_device *ndev;
 293         enum ib_mtu tmp;
 294         struct mlx4_cmd_mailbox *mailbox;
 295         int err = 0;
 296
 297         mailbox = mlx4_alloc_cmd_mailbox(mdev->dev);
 298         if (IS_ERR(mailbox))
 299                 return PTR_ERR(mailbox);
 300
 301         err = mlx4_cmd_box(mdev->dev, 0, mailbox->dma, port, 0,
 302                            MLX4_CMD_QUERY_PORT, MLX4_CMD_TIME_CLASS_B,
 303                            MLX4_CMD_WRAPPED);
 304         if (err)
 305                 goto out;
 306
 307         props->active_width     =  (((u8 *)mailbox->buf)[5] == 0x40) ?
 308                                                 IB_WIDTH_4X : IB_WIDTH_1X;
 309         props->active_speed     = IB_SPEED_QDR;
 310         props->port_cap_flags   = IB_PORT_CM_SUP;
 311         props->gid_tbl_len      = mdev->dev->caps.gid_table_len[port];
 312         props->max_msg_sz       = mdev->dev->caps.max_msg_sz;
 313         props->pkey_tbl_len     = 1;
 314         props->max_mtu          = IB_MTU_4096;
 315         props->max_vl_num       = 2;
 316         props->state            = IB_PORT_DOWN;
 317         props->phys_state       = state_to_phys_state(props->state);
 318         props->active_mtu       = IB_MTU_256;
 319         spin_lock(&iboe->lock);
 320         ndev = iboe->netdevs[port - 1];
 321         if (!ndev)
 322                 goto out_unlock;
 323
 324         tmp = iboe_get_mtu(ndev->mtu);
 325         props->active_mtu = tmp ? min(props->max_mtu, tmp) : IB_MTU_256;
 326
 327         props->state            = (netif_running(ndev) && netif_carrier_ok(ndev)) ?
 328                                         IB_PORT_ACTIVE : IB_PORT_DOWN;
 329         props->phys_state       = state_to_phys_state(props->state);
 330 out_unlock:
 331         spin_unlock(&iboe->lock);
 332 out:
 333         mlx4_free_cmd_mailbox(mdev->dev, mailbox);
 334         return err;
 335 }
 336
 337 int __mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
 338                          struct ib_port_attr *props, int netw_view)
 339 {
 340         int err;
 341
 342         memset(props, 0, sizeof *props);
 343
 344         err = mlx4_ib_port_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND ?
 345                 ib_link_query_port(ibdev, port, props, netw_view) :
 346                                 eth_link_query_port(ibdev, port, props, netw_view);
 347
 348         return err;
 349 }
 350
 351 static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
 352                               struct ib_port_attr *props)
 353 {
 354         /* returns host view */
 355         return __mlx4_ib_query_port(ibdev, port, props, 0);
 356 }
 357
 358 int __mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 359                         union ib_gid *gid, int netw_view)
 360 {
 361         struct ib_smp *in_mad  = NULL;
 362         struct ib_smp *out_mad = NULL;
 363         int err = -ENOMEM;
 364         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 365         int clear = 0;
 366         int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
 367
 368         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 369         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 370         if (!in_mad || !out_mad)
 371                 goto out;
 372
 373         init_query_mad(in_mad);
 374         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 375         in_mad->attr_mod = cpu_to_be32(port);
 376
 377         if (mlx4_is_mfunc(dev->dev) && netw_view)
 378                 mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
 379
 380         err = mlx4_MAD_IFC(dev, mad_ifc_flags, port, NULL, NULL, in_mad, out_mad);
 381         if (err)
 382                 goto out;
 383
 384         memcpy(gid->raw, out_mad->data + 8, 8);
 385
 386         if (mlx4_is_mfunc(dev->dev) && !netw_view) {
 387                 if (index) {
 388                         /* For any index > 0, return the null guid */
 389                         err = 0;
 390                         clear = 1;
 391                         goto out;
 392                 }
 393         }
 394
 395         init_query_mad(in_mad);
 396         in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 397         in_mad->attr_mod = cpu_to_be32(index / 8);
 398
 399         err = mlx4_MAD_IFC(dev, mad_ifc_flags, port,
 400                            NULL, NULL, in_mad, out_mad);
 401         if (err)
 402                 goto out;
 403
 404         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
 405
 406 out:
 407         if (clear)
 408                 memset(gid->raw + 8, 0, 8);
 409         kfree(in_mad);
 410         kfree(out_mad);
 411         return err;
 412 }
 413
 414 static int iboe_query_gid(struct ib_device *ibdev, u8 port, int index,
 415                           union ib_gid *gid)
 416 {
 417         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 418
 419         *gid = dev->iboe.gid_table[port - 1][index];
 420
 421         return 0;
 422 }
 423
 424 static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 425                              union ib_gid *gid)
 426 {
 427         if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
 428                 return __mlx4_ib_query_gid(ibdev, port, index, gid, 0);
 429         else
 430                 return iboe_query_gid(ibdev, port, index, gid);
 431 }
 432
 433 int __mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 434                          u16 *pkey, int netw_view)
 435 {
 436         struct ib_smp *in_mad  = NULL;
 437         struct ib_smp *out_mad = NULL;
 438         int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
 439         int err = -ENOMEM;
 440
 441         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 442         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 443         if (!in_mad || !out_mad)
 444                 goto out;
 445
 446         init_query_mad(in_mad);
 447         in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 448         in_mad->attr_mod = cpu_to_be32(index / 32);
 449
 450         if (mlx4_is_mfunc(to_mdev(ibdev)->dev) && netw_view)
 451                 mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
 452
 453         err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
 454                            in_mad, out_mad);
 455         if (err)
 456                 goto out;
 457
 458         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 459
 460 out:
 461         kfree(in_mad);
 462         kfree(out_mad);
 463         return err;
 464 }
 465
 466 static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 467 {
 468         return __mlx4_ib_query_pkey(ibdev, port, index, pkey, 0);
 469 }
 470
 471 static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
 472                                  struct ib_device_modify *props)
 473 {
 474         struct mlx4_cmd_mailbox *mailbox;
 475         unsigned long flags;
 476
 477         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
 478                 return -EOPNOTSUPP;
 479
 480         if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
 481                 return 0;
 482
 483         if (mlx4_is_slave(to_mdev(ibdev)->dev))
 484                 return -EOPNOTSUPP;
 485
 486         spin_lock_irqsave(&to_mdev(ibdev)->sm_lock, flags);
 487         memcpy(ibdev->node_desc, props->node_desc, 64);
 488         spin_unlock_irqrestore(&to_mdev(ibdev)->sm_lock, flags);
 489
 490         /*
 491          * If possible, pass node desc to FW, so it can generate
 492          * a 144 trap.  If cmd fails, just ignore.
 493          */
 494         mailbox = mlx4_alloc_cmd_mailbox(to_mdev(ibdev)->dev);
 495         if (IS_ERR(mailbox))
 496                 return 0;
 497
 498         memset(mailbox->buf, 0, 256);
 499         memcpy(mailbox->buf, props->node_desc, 64);
 500         mlx4_cmd(to_mdev(ibdev)->dev, mailbox->dma, 1, 0,
 501                  MLX4_CMD_SET_NODE, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
 502
 503         mlx4_free_cmd_mailbox(to_mdev(ibdev)->dev, mailbox);
 504
 505         return 0;
 506 }
 507
 508 static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
 509                          u32 cap_mask)
 510 {
 511         struct mlx4_cmd_mailbox *mailbox;
 512         int err;
 513         u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
 514
 515         mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 516         if (IS_ERR(mailbox))
 517                 return PTR_ERR(mailbox);
 518
 519         memset(mailbox->buf, 0, 256);
 520
 521         if (dev->dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
 522                 *(u8 *) mailbox->buf         = !!reset_qkey_viols << 6;
 523                 ((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
 524         } else {
 525                 ((u8 *) mailbox->buf)[3]     = !!reset_qkey_viols;
 526                 ((__be32 *) mailbox->buf)[1] = cpu_to_be32(cap_mask);
 527         }
 528
 529         err = mlx4_cmd(dev->dev, mailbox->dma, port, is_eth, MLX4_CMD_SET_PORT,
 530                        MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
 531
 532         mlx4_free_cmd_mailbox(dev->dev, mailbox);
 533         return err;
 534 }
 535
 536 static int mlx4_ib_modify_port(struct ib_device *ibdev, u8 port, int mask,
 537                                struct ib_port_modify *props)
 538 {
 539         struct ib_port_attr attr;
 540         u32 cap_mask;
 541         int err;
 542
 543         mutex_lock(&to_mdev(ibdev)->cap_mask_mutex);
 544
 545         err = mlx4_ib_query_port(ibdev, port, &attr);
 546         if (err)
 547                 goto out;
 548
 549         cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 550                 ~props->clr_port_cap_mask;
 551
 552         err = mlx4_SET_PORT(to_mdev(ibdev), port,
 553                             !!(mask & IB_PORT_RESET_QKEY_CNTR),
 554                             cap_mask);
 555
 556 out:
 557         mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 558         return err;
 559 }
 560
 561 static struct ib_ucontext *mlx4_ib_alloc_ucontext(struct ib_device *ibdev,
 562                                                   struct ib_udata *udata)
 563 {
 564         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 565         struct mlx4_ib_ucontext *context;
 566         struct mlx4_ib_alloc_ucontext_resp resp;
 567         int err;
 568
 569         if (!dev->ib_active)
 570                 return ERR_PTR(-EAGAIN);
 571
 572         resp.qp_tab_size      = dev->dev->caps.num_qps;
 573         resp.bf_reg_size      = dev->dev->caps.bf_reg_size;
 574         resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
 575
 576         context = kmalloc(sizeof *context, GFP_KERNEL);
 577         if (!context)
 578                 return ERR_PTR(-ENOMEM);
 579
 580         err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
 581         if (err) {
 582                 kfree(context);
 583                 return ERR_PTR(err);
 584         }
 585
 586         INIT_LIST_HEAD(&context->db_page_list);
 587         mutex_init(&context->db_page_mutex);
 588
 589         err = ib_copy_to_udata(udata, &resp, sizeof resp);
 590         if (err) {
 591                 mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
 592                 kfree(context);
 593                 return ERR_PTR(-EFAULT);
 594         }
 595
 596         return &context->ibucontext;
 597 }
 598
 599 static int mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
 600 {
 601         struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
 602
 603         mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
 604         kfree(context);
 605
 606         return 0;
 607 }
 608
 609 static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 610 {
 611         struct mlx4_ib_dev *dev = to_mdev(context->device);
 612
 613         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 614                 return -EINVAL;
 615
 616         if (vma->vm_pgoff == 0) {
 617                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 618
 619                 if (io_remap_pfn_range(vma, vma->vm_start,
 620                                        to_mucontext(context)->uar.pfn,
 621                                        PAGE_SIZE, vma->vm_page_prot))
 622                         return -EAGAIN;
 623         } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) {
 624                 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
 625
 626                 if (io_remap_pfn_range(vma, vma->vm_start,
 627                                        to_mucontext(context)->uar.pfn +
 628                                        dev->dev->caps.num_uars,
 629                                        PAGE_SIZE, vma->vm_page_prot))
 630                         return -EAGAIN;
 631         } else
 632                 return -EINVAL;
 633
 634         return 0;
 635 }
 636
 637 static struct ib_pd *mlx4_ib_alloc_pd(struct ib_device *ibdev,
 638                                       struct ib_ucontext *context,
 639                                       struct ib_udata *udata)
 640 {
 641         struct mlx4_ib_pd *pd;
 642         int err;
 643
 644         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 645         if (!pd)
 646                 return ERR_PTR(-ENOMEM);
 647
 648         err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
 649         if (err) {
 650                 kfree(pd);
 651                 return ERR_PTR(err);
 652         }
 653
 654         if (context)
 655                 if (ib_copy_to_udata(udata, &pd->pdn, sizeof (__u32))) {
 656                         mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
 657                         kfree(pd);
 658                         return ERR_PTR(-EFAULT);
 659                 }
 660
 661         return &pd->ibpd;
 662 }
 663
 664 static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
 665 {
 666         mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
 667         kfree(pd);
 668
 669         return 0;
 670 }
 671
 672 static struct ib_xrcd *mlx4_ib_alloc_xrcd(struct ib_device *ibdev,
 673                                           struct ib_ucontext *context,
 674                                           struct ib_udata *udata)
 675 {
 676         struct mlx4_ib_xrcd *xrcd;
 677         int err;
 678
 679         if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
 680                 return ERR_PTR(-ENOSYS);
 681
 682         xrcd = kmalloc(sizeof *xrcd, GFP_KERNEL);
 683         if (!xrcd)
 684                 return ERR_PTR(-ENOMEM);
 685
 686         err = mlx4_xrcd_alloc(to_mdev(ibdev)->dev, &xrcd->xrcdn);
 687         if (err)
 688                 goto err1;
 689
 690         xrcd->pd = ib_alloc_pd(ibdev);
 691         if (IS_ERR(xrcd->pd)) {
 692                 err = PTR_ERR(xrcd->pd);
 693                 goto err2;
 694         }
 695
 696         xrcd->cq = ib_create_cq(ibdev, NULL, NULL, xrcd, 1, 0);
 697         if (IS_ERR(xrcd->cq)) {
 698                 err = PTR_ERR(xrcd->cq);
 699                 goto err3;
 700         }
 701
 702         return &xrcd->ibxrcd;
 703
 704 err3:
 705         ib_dealloc_pd(xrcd->pd);
 706 err2:
 707         mlx4_xrcd_free(to_mdev(ibdev)->dev, xrcd->xrcdn);
 708 err1:
 709         kfree(xrcd);
 710         return ERR_PTR(err);
 711 }
 712
 713 static int mlx4_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
 714 {
 715         ib_destroy_cq(to_mxrcd(xrcd)->cq);
 716         ib_dealloc_pd(to_mxrcd(xrcd)->pd);
 717         mlx4_xrcd_free(to_mdev(xrcd->device)->dev, to_mxrcd(xrcd)->xrcdn);
 718         kfree(xrcd);
 719
 720         return 0;
 721 }
 722
 723 static int add_gid_entry(struct ib_qp *ibqp, union ib_gid *gid)
 724 {
 725         struct mlx4_ib_qp *mqp = to_mqp(ibqp);
 726         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
 727         struct mlx4_ib_gid_entry *ge;
 728
 729         ge = kzalloc(sizeof *ge, GFP_KERNEL);
 730         if (!ge)
 731                 return -ENOMEM;
 732
 733         ge->gid = *gid;
 734         if (mlx4_ib_add_mc(mdev, mqp, gid)) {
 735                 ge->port = mqp->port;
 736                 ge->added = 1;
 737         }
 738
 739         mutex_lock(&mqp->mutex);
 740         list_add_tail(&ge->list, &mqp->gid_list);
 741         mutex_unlock(&mqp->mutex);
 742
 743         return 0;
 744 }
 745
 746 int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
 747                    union ib_gid *gid)
 748 {
 749         u8 mac[6];
 750         struct net_device *ndev;
 751         int ret = 0;
 752
 753         if (!mqp->port)
 754                 return 0;
 755
 756         spin_lock(&mdev->iboe.lock);
 757         ndev = mdev->iboe.netdevs[mqp->port - 1];
 758         if (ndev)
 759                 dev_hold(ndev);
 760         spin_unlock(&mdev->iboe.lock);
 761
 762         if (ndev) {
 763                 rdma_get_mcast_mac((struct in6_addr *)gid, mac);
 764                 rtnl_lock();
 765                 dev_mc_add(mdev->iboe.netdevs[mqp->port - 1], mac);
 766                 ret = 1;
 767                 rtnl_unlock();
 768                 dev_put(ndev);
 769         }
 770
 771         return ret;
 772 }
 773
 774 struct mlx4_ib_steering {
 775         struct list_head list;
 776         u64 reg_id;
 777         union ib_gid gid;
 778 };
 779
 780 static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
 781 {
 782         int err;
 783         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
 784         struct mlx4_ib_qp *mqp = to_mqp(ibqp);
 785         u64 reg_id;
 786         struct mlx4_ib_steering *ib_steering = NULL;
 787
 788         if (mdev->dev->caps.steering_mode ==
 789             MLX4_STEERING_MODE_DEVICE_MANAGED) {
 790                 ib_steering = kmalloc(sizeof(*ib_steering), GFP_KERNEL);
 791                 if (!ib_steering)
 792                         return -ENOMEM;
 793         }
 794
 795         err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw, mqp->port,
 796                                     !!(mqp->flags &
 797                                        MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
 798                                     MLX4_PROT_IB_IPV6, &reg_id);
 799         if (err)
 800                 goto err_malloc;
 801
 802         err = add_gid_entry(ibqp, gid);
 803         if (err)
 804                 goto err_add;
 805
 806         if (ib_steering) {
 807                 memcpy(ib_steering->gid.raw, gid->raw, 16);
 808                 ib_steering->reg_id = reg_id;
 809                 mutex_lock(&mqp->mutex);
 810                 list_add(&ib_steering->list, &mqp->steering_rules);
 811                 mutex_unlock(&mqp->mutex);
 812         }
 813         return 0;
 814
 815 err_add:
 816         mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
 817                               MLX4_PROT_IB_IPV6, reg_id);
 818 err_malloc:
 819         kfree(ib_steering);
 820
 821         return err;
 822 }
 823
 824 static struct mlx4_ib_gid_entry *find_gid_entry(struct mlx4_ib_qp *qp, u8 *raw)
 825 {
 826         struct mlx4_ib_gid_entry *ge;
 827         struct mlx4_ib_gid_entry *tmp;
 828         struct mlx4_ib_gid_entry *ret = NULL;
 829
 830         list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
 831                 if (!memcmp(raw, ge->gid.raw, 16)) {
 832                         ret = ge;
 833                         break;
 834                 }
 835         }
 836
 837         return ret;
 838 }
 839
 840 static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
 841 {
 842         int err;
 843         struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
 844         struct mlx4_ib_qp *mqp = to_mqp(ibqp);
 845         u8 mac[6];
 846         struct net_device *ndev;
 847         struct mlx4_ib_gid_entry *ge;
 848         u64 reg_id = 0;
 849
 850         if (mdev->dev->caps.steering_mode ==
 851             MLX4_STEERING_MODE_DEVICE_MANAGED) {
 852                 struct mlx4_ib_steering *ib_steering;
 853
 854                 mutex_lock(&mqp->mutex);
 855                 list_for_each_entry(ib_steering, &mqp->steering_rules, list) {
 856                         if (!memcmp(ib_steering->gid.raw, gid->raw, 16)) {
 857                                 list_del(&ib_steering->list);
 858                                 break;
 859                         }
 860                 }
 861                 mutex_unlock(&mqp->mutex);
 862                 if (&ib_steering->list == &mqp->steering_rules) {
 863                         pr_err("Couldn't find reg_id for mgid. Steering rule is left attached\n");
 864                         return -EINVAL;
 865                 }
 866                 reg_id = ib_steering->reg_id;
 867                 kfree(ib_steering);
 868         }
 869
 870         err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
 871                                     MLX4_PROT_IB_IPV6, reg_id);
 872         if (err)
 873                 return err;
 874
 875         mutex_lock(&mqp->mutex);
 876         ge = find_gid_entry(mqp, gid->raw);
 877         if (ge) {
 878                 spin_lock(&mdev->iboe.lock);
 879                 ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
 880                 if (ndev)
 881                         dev_hold(ndev);
 882                 spin_unlock(&mdev->iboe.lock);
 883                 rdma_get_mcast_mac((struct in6_addr *)gid, mac);
 884                 if (ndev) {
 885                         rtnl_lock();
 886                         dev_mc_del(mdev->iboe.netdevs[ge->port - 1], mac);
 887                         rtnl_unlock();
 888                         dev_put(ndev);
 889                 }
 890                 list_del(&ge->list);
 891                 kfree(ge);
 892         } else
 893                 pr_warn("could not find mgid entry\n");
 894
 895         mutex_unlock(&mqp->mutex);
 896
 897         return 0;
 898 }
 899
 900 static int init_node_data(struct mlx4_ib_dev *dev)
 901 {
 902         struct ib_smp *in_mad  = NULL;
 903         struct ib_smp *out_mad = NULL;
 904         int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
 905         int err = -ENOMEM;
 906
 907         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 908         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 909         if (!in_mad || !out_mad)
 910                 goto out;
 911
 912         init_query_mad(in_mad);
 913         in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
 914         if (mlx4_is_master(dev->dev))
 915                 mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
 916
 917         err = mlx4_MAD_IFC(dev, mad_ifc_flags, 1, NULL, NULL, in_mad, out_mad);
 918         if (err)
 919                 goto out;
 920
 921         memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
 922
 923         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
 924
 925         err = mlx4_MAD_IFC(dev, mad_ifc_flags, 1, NULL, NULL, in_mad, out_mad);
 926         if (err)
 927                 goto out;
 928
 929         dev->dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
 930         memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
 931
 932 out:
 933         kfree(in_mad);
 934         kfree(out_mad);
 935         return err;
 936 }
 937
 938 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 939                         char *buf)
 940 {
 941         struct mlx4_ib_dev *dev =
 942                 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
 943         return sprintf(buf, "MT%d\n", dev->dev->pdev->device);
 944 }
 945
 946 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
 947                            char *buf)
 948 {
 949         struct mlx4_ib_dev *dev =
 950                 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
 951         return sprintf(buf, "%d.%d.%d\n", (int) (dev->dev->caps.fw_ver >> 32),
 952                        (int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
 953                        (int) dev->dev->caps.fw_ver & 0xffff);
 954 }
 955
 956 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 957                         char *buf)
 958 {
 959         struct mlx4_ib_dev *dev =
 960                 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
 961         return sprintf(buf, "%x\n", dev->dev->rev_id);
 962 }
 963
 964 static ssize_t show_board(struct device *device, struct device_attribute *attr,
 965                           char *buf)
 966 {
 967         struct mlx4_ib_dev *dev =
 968                 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
 969         return sprintf(buf, "%.*s\n", MLX4_BOARD_ID_LEN,
 970                        dev->dev->board_id);
 971 }
 972
 973 static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
 974 static DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
 975 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
 976 static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
 977
 978 static struct device_attribute *mlx4_class_attributes[] = {
 979         &dev_attr_hw_rev,
 980         &dev_attr_fw_ver,
 981         &dev_attr_hca_type,
 982         &dev_attr_board_id
 983 };
 984
 985 static void mlx4_addrconf_ifid_eui48(u8 *eui, u16 vlan_id, struct net_device *dev)
 986 {
 987         memcpy(eui, dev->dev_addr, 3);
 988         memcpy(eui + 5, dev->dev_addr + 3, 3);
 989         if (vlan_id < 0x1000) {
 990                 eui[3] = vlan_id >> 8;
 991                 eui[4] = vlan_id & 0xff;
 992         } else {
 993                 eui[3] = 0xff;
 994                 eui[4] = 0xfe;
 995         }
 996         eui[0] ^= 2;
 997 }
 998
 999 static void update_gids_task(struct work_struct *work)
1000 {
1001         struct update_gid_work *gw = container_of(work, struct update_gid_work, work);
1002         struct mlx4_cmd_mailbox *mailbox;
1003         union ib_gid *gids;
1004         int err;
1005         struct mlx4_dev *dev = gw->dev->dev;
1006
1007         mailbox = mlx4_alloc_cmd_mailbox(dev);
1008         if (IS_ERR(mailbox)) {
1009                 pr_warn("update gid table failed %ld\n", PTR_ERR(mailbox));
1010                 return;
1011         }
1012
1013         gids = mailbox->buf;
1014         memcpy(gids, gw->gids, sizeof gw->gids);
1015
1016         err = mlx4_cmd(dev, mailbox->dma, MLX4_SET_PORT_GID_TABLE << 8 | gw->port,
1017                        1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
1018                        MLX4_CMD_WRAPPED);
1019         if (err)
1020                 pr_warn("set port command failed\n");
1021         else {
1022                 memcpy(gw->dev->iboe.gid_table[gw->port - 1], gw->gids, sizeof gw->gids);
1023                 mlx4_ib_dispatch_event(gw->dev, gw->port, IB_EVENT_GID_CHANGE);
1024         }
1025
1026         mlx4_free_cmd_mailbox(dev, mailbox);
1027         kfree(gw);
1028 }
1029
1030 static int update_ipv6_gids(struct mlx4_ib_dev *dev, int port, int clear)
1031 {
1032         struct net_device *ndev = dev->iboe.netdevs[port - 1];
1033         struct update_gid_work *work;
1034         struct net_device *tmp;
1035         int i;
1036         u8 *hits;
1037         int ret;
1038         union ib_gid gid;
1039         int free;
1040         int found;
1041         int need_update = 0;
1042         u16 vid;
1043
1044         work = kzalloc(sizeof *work, GFP_ATOMIC);
1045         if (!work)
1046                 return -ENOMEM;
1047
1048         hits = kzalloc(128, GFP_ATOMIC);
1049         if (!hits) {
1050                 ret = -ENOMEM;
1051                 goto out;
1052         }
1053
1054         rcu_read_lock();
1055         for_each_netdev_rcu(&init_net, tmp) {
1056                 if (ndev && (tmp == ndev || rdma_vlan_dev_real_dev(tmp) == ndev)) {
1057                         gid.global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
1058                         vid = rdma_vlan_dev_vlan_id(tmp);
1059                         mlx4_addrconf_ifid_eui48(&gid.raw[8], vid, ndev);
1060                         found = 0;
1061                         free = -1;
1062                         for (i = 0; i < 128; ++i) {
1063                                 if (free < 0 &&
1064                                     !memcmp(&dev->iboe.gid_table[port - 1][i], &zgid, sizeof zgid))
1065                                         free = i;
1066                                 if (!memcmp(&dev->iboe.gid_table[port - 1][i], &gid, sizeof gid)) {
1067                                         hits[i] = 1;
1068                                         found = 1;
1069                                         break;
1070                                 }
1071                         }
1072
1073                         if (!found) {
1074                                 if (tmp == ndev &&
1075                                     (memcmp(&dev->iboe.gid_table[port - 1][0],
1076                                             &gid, sizeof gid) ||
1077                                      !memcmp(&dev->iboe.gid_table[port - 1][0],
1078                                              &zgid, sizeof gid))) {
1079                                         dev->iboe.gid_table[port - 1][0] = gid;
1080                                         ++need_update;
1081                                         hits[0] = 1;
1082                                 } else if (free >= 0) {
1083                                         dev->iboe.gid_table[port - 1][free] = gid;
1084                                         hits[free] = 1;
1085                                         ++need_update;
1086                                 }
1087                         }
1088                 }
1089         }
1090         rcu_read_unlock();
1091
1092         for (i = 0; i < 128; ++i)
1093                 if (!hits[i]) {
1094                         if (memcmp(&dev->iboe.gid_table[port - 1][i], &zgid, sizeof zgid))
1095                                 ++need_update;
1096                         dev->iboe.gid_table[port - 1][i] = zgid;
1097                 }
1098
1099         if (need_update) {
1100                 memcpy(work->gids, dev->iboe.gid_table[port - 1], sizeof work->gids);
1101                 INIT_WORK(&work->work, update_gids_task);
1102                 work->port = port;
1103                 work->dev = dev;
1104                 queue_work(wq, &work->work);
1105         } else
1106                 kfree(work);
1107
1108         kfree(hits);
1109         return 0;
1110
1111 out:
1112         kfree(work);
1113         return ret;
1114 }
1115
1116 static void handle_en_event(struct mlx4_ib_dev *dev, int port, unsigned long event)
1117 {
1118         switch (event) {
1119         case NETDEV_UP:
1120         case NETDEV_CHANGEADDR:
1121                 update_ipv6_gids(dev, port, 0);
1122                 break;
1123
1124         case NETDEV_DOWN:
1125                 update_ipv6_gids(dev, port, 1);
1126                 dev->iboe.netdevs[port - 1] = NULL;
1127         }
1128 }
1129
1130 static void netdev_added(struct mlx4_ib_dev *dev, int port)
1131 {
1132         update_ipv6_gids(dev, port, 0);
1133 }
1134
1135 static void netdev_removed(struct mlx4_ib_dev *dev, int port)
1136 {
1137         update_ipv6_gids(dev, port, 1);
1138 }
1139
1140 static int mlx4_ib_netdev_event(struct notifier_block *this, unsigned long event,
1141                                 void *ptr)
1142 {
1143         struct net_device *dev = ptr;
1144         struct mlx4_ib_dev *ibdev;
1145         struct net_device *oldnd;
1146         struct mlx4_ib_iboe *iboe;
1147         int port;
1148
1149         if (!net_eq(dev_net(dev), &init_net))
1150                 return NOTIFY_DONE;
1151
1152         ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb);
1153         iboe = &ibdev->iboe;
1154
1155         spin_lock(&iboe->lock);
1156         mlx4_foreach_ib_transport_port(port, ibdev->dev) {
1157                 oldnd = iboe->netdevs[port - 1];
1158                 iboe->netdevs[port - 1] =
1159                         mlx4_get_protocol_dev(ibdev->dev, MLX4_PROT_ETH, port);
1160                 if (oldnd != iboe->netdevs[port - 1]) {
1161                         if (iboe->netdevs[port - 1])
1162                                 netdev_added(ibdev, port);
1163                         else
1164                                 netdev_removed(ibdev, port);
1165                 }
1166         }
1167
1168         if (dev == iboe->netdevs[0] ||
1169             (iboe->netdevs[0] && rdma_vlan_dev_real_dev(dev) == iboe->netdevs[0]))
1170                 handle_en_event(ibdev, 1, event);
1171         else if (dev == iboe->netdevs[1]
1172                  || (iboe->netdevs[1] && rdma_vlan_dev_real_dev(dev) == iboe->netdevs[1]))
1173                 handle_en_event(ibdev, 2, event);
1174
1175         spin_unlock(&iboe->lock);
1176
1177         return NOTIFY_DONE;
1178 }
1179
1180 static void init_pkeys(struct mlx4_ib_dev *ibdev)
1181 {
1182         int port;
1183         int slave;
1184         int i;
1185
1186         if (mlx4_is_master(ibdev->dev)) {
1187                 for (slave = 0; slave <= ibdev->dev->num_vfs; ++slave) {
1188                         for (port = 1; port <= ibdev->dev->caps.num_ports; ++port) {
1189                                 for (i = 0;
1190                                      i < ibdev->dev->phys_caps.pkey_phys_table_len[port];
1191                                      ++i) {
1192                                         ibdev->pkeys.virt2phys_pkey[slave][port - 1][i] =
1193                                         /* master has the identity virt2phys pkey mapping */
1194                                                 (slave == mlx4_master_func_num(ibdev->dev) || !i) ? i :
1195                                                         ibdev->dev->phys_caps.pkey_phys_table_len[port] - 1;
1196                                         mlx4_sync_pkey_table(ibdev->dev, slave, port, i,
1197                                                              ibdev->pkeys.virt2phys_pkey[slave][port - 1][i]);
1198                                 }
1199                         }
1200                 }
1201                 /* initialize pkey cache */
1202                 for (port = 1; port <= ibdev->dev->caps.num_ports; ++port) {
1203                         for (i = 0;
1204                              i < ibdev->dev->phys_caps.pkey_phys_table_len[port];
1205                              ++i)
1206                                 ibdev->pkeys.phys_pkey_cache[port-1][i] =
1207                                         (i) ? 0 : 0xFFFF;
1208                 }
1209         }
1210 }
1211
1212 static void mlx4_ib_alloc_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
1213 {
1214         char name[32];
1215         int eq_per_port = 0;
1216         int added_eqs = 0;
1217         int total_eqs = 0;
1218         int i, j, eq;
1219
1220         /* Legacy mode or comp_pool is not large enough */
1221         if (dev->caps.comp_pool == 0 ||
1222             dev->caps.num_ports > dev->caps.comp_pool)
1223                 return;
1224
1225         eq_per_port = rounddown_pow_of_two(dev->caps.comp_pool/
1226                                         dev->caps.num_ports);
1227
1228         /* Init eq table */
1229         added_eqs = 0;
1230         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
1231                 added_eqs += eq_per_port;
1232
1233         total_eqs = dev->caps.num_comp_vectors + added_eqs;
1234
1235         ibdev->eq_table = kzalloc(total_eqs * sizeof(int), GFP_KERNEL);
1236         if (!ibdev->eq_table)
1237                 return;
1238
1239         ibdev->eq_added = added_eqs;
1240
1241         eq = 0;
1242         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB) {
1243                 for (j = 0; j < eq_per_port; j++) {
1244                         sprintf(name, "mlx4-ib-%d-%d@%s",
1245                                 i, j, dev->pdev->bus->name);
1246                         /* Set IRQ for specific name (per ring) */
1247                         if (mlx4_assign_eq(dev, name, NULL,
1248                                            &ibdev->eq_table[eq])) {
1249                                 /* Use legacy (same as mlx4_en driver) */
1250                                 pr_warn("Can't allocate EQ %d; reverting to legacy\n", eq);
1251                                 ibdev->eq_table[eq] =
1252                                         (eq % dev->caps.num_comp_vectors);
1253                         }
1254                         eq++;
1255                 }
1256         }
1257
1258         /* Fill the reset of the vector with legacy EQ */
1259         for (i = 0, eq = added_eqs; i < dev->caps.num_comp_vectors; i++)
1260                 ibdev->eq_table[eq++] = i;
1261
1262         /* Advertise the new number of EQs to clients */
1263         ibdev->ib_dev.num_comp_vectors = total_eqs;
1264 }
1265
1266 static void mlx4_ib_free_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
1267 {
1268         int i;
1269
1270         /* no additional eqs were added */
1271         if (!ibdev->eq_table)
1272                 return;
1273
1274         /* Reset the advertised EQ number */
1275         ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;
1276
1277         /* Free only the added eqs */
1278         for (i = 0; i < ibdev->eq_added; i++) {
1279                 /* Don't free legacy eqs if used */
1280                 if (ibdev->eq_table[i] <= dev->caps.num_comp_vectors)
1281                         continue;
1282                 mlx4_release_eq(dev, ibdev->eq_table[i]);
1283         }
1284
1285         kfree(ibdev->eq_table);
1286 }
1287
1288 static void *mlx4_ib_add(struct mlx4_dev *dev)
1289 {
1290         struct mlx4_ib_dev *ibdev;
1291         int num_ports = 0;
1292         int i, j;
1293         int err;
1294         struct mlx4_ib_iboe *iboe;
1295
1296         pr_info_once("%s", mlx4_ib_version);
1297
1298         mlx4_foreach_non_ib_transport_port(i, dev)
1299                 num_ports++;
1300
1301         if (mlx4_is_mfunc(dev) && num_ports) {
1302                 dev_err(&dev->pdev->dev, "RoCE is not supported over SRIOV as yet\n");
1303                 return NULL;
1304         }
1305
1306         num_ports = 0;
1307         mlx4_foreach_ib_transport_port(i, dev)
1308                 num_ports++;
1309
1310         /* No point in registering a device with no ports... */
1311         if (num_ports == 0)
1312                 return NULL;
1313
1314         ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
1315         if (!ibdev) {
1316                 dev_err(&dev->pdev->dev, "Device struct alloc failed\n");
1317                 return NULL;
1318         }
1319
1320         iboe = &ibdev->iboe;
1321
1322         if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
1323                 goto err_dealloc;
1324
1325         if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
1326                 goto err_pd;
1327
1328         ibdev->uar_map = ioremap((phys_addr_t) ibdev->priv_uar.pfn << PAGE_SHIFT,
1329                                  PAGE_SIZE);
1330         if (!ibdev->uar_map)
1331                 goto err_uar;
1332         MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);
1333
1334         ibdev->dev = dev;
1335
1336         strlcpy(ibdev->ib_dev.name, "mlx4_%d", IB_DEVICE_NAME_MAX);
1337         ibdev->ib_dev.owner             = THIS_MODULE;
1338         ibdev->ib_dev.node_type         = RDMA_NODE_IB_CA;
1339         ibdev->ib_dev.local_dma_lkey    = dev->caps.reserved_lkey;
1340         ibdev->num_ports                = num_ports;
1341         ibdev->ib_dev.phys_port_cnt     = ibdev->num_ports;
1342         ibdev->ib_dev.num_comp_vectors  = dev->caps.num_comp_vectors;
1343         ibdev->ib_dev.dma_device        = &dev->pdev->dev;
1344
1345         ibdev->ib_dev.uverbs_abi_ver    = MLX4_IB_UVERBS_ABI_VERSION;
1346         ibdev->ib_dev.uverbs_cmd_mask   =
1347                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1348                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1349                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1350                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1351                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1352                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1353                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1354                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1355                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1356                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
1357                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1358                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1359                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1360                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
1361                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1362                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1363                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
1364                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1365                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1366                 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
1367                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
1368                 (1ull << IB_USER_VERBS_CMD_CREATE_XSRQ)         |
1369                 (1ull << IB_USER_VERBS_CMD_OPEN_QP);
1370
1371         ibdev->ib_dev.query_device      = mlx4_ib_query_device;
1372         ibdev->ib_dev.query_port        = mlx4_ib_query_port;
1373         ibdev->ib_dev.get_link_layer    = mlx4_ib_port_link_layer;
1374         ibdev->ib_dev.query_gid         = mlx4_ib_query_gid;
1375         ibdev->ib_dev.query_pkey        = mlx4_ib_query_pkey;
1376         ibdev->ib_dev.modify_device     = mlx4_ib_modify_device;
1377         ibdev->ib_dev.modify_port       = mlx4_ib_modify_port;
1378         ibdev->ib_dev.alloc_ucontext    = mlx4_ib_alloc_ucontext;
1379         ibdev->ib_dev.dealloc_ucontext  = mlx4_ib_dealloc_ucontext;
1380         ibdev->ib_dev.mmap              = mlx4_ib_mmap;
1381         ibdev->ib_dev.alloc_pd          = mlx4_ib_alloc_pd;
1382         ibdev->ib_dev.dealloc_pd        = mlx4_ib_dealloc_pd;
1383         ibdev->ib_dev.create_ah         = mlx4_ib_create_ah;
1384         ibdev->ib_dev.query_ah          = mlx4_ib_query_ah;
1385         ibdev->ib_dev.destroy_ah        = mlx4_ib_destroy_ah;
1386         ibdev->ib_dev.create_srq        = mlx4_ib_create_srq;
1387         ibdev->ib_dev.modify_srq        = mlx4_ib_modify_srq;
1388         ibdev->ib_dev.query_srq         = mlx4_ib_query_srq;
1389         ibdev->ib_dev.destroy_srq       = mlx4_ib_destroy_srq;
1390         ibdev->ib_dev.post_srq_recv     = mlx4_ib_post_srq_recv;
1391         ibdev->ib_dev.create_qp         = mlx4_ib_create_qp;
1392         ibdev->ib_dev.modify_qp         = mlx4_ib_modify_qp;
1393         ibdev->ib_dev.query_qp          = mlx4_ib_query_qp;
1394         ibdev->ib_dev.destroy_qp        = mlx4_ib_destroy_qp;
1395         ibdev->ib_dev.post_send         = mlx4_ib_post_send;
1396         ibdev->ib_dev.post_recv         = mlx4_ib_post_recv;
1397         ibdev->ib_dev.create_cq         = mlx4_ib_create_cq;
1398         ibdev->ib_dev.modify_cq         = mlx4_ib_modify_cq;
1399         ibdev->ib_dev.resize_cq         = mlx4_ib_resize_cq;
1400         ibdev->ib_dev.destroy_cq        = mlx4_ib_destroy_cq;
1401         ibdev->ib_dev.poll_cq           = mlx4_ib_poll_cq;
1402         ibdev->ib_dev.req_notify_cq     = mlx4_ib_arm_cq;
1403         ibdev->ib_dev.get_dma_mr        = mlx4_ib_get_dma_mr;
1404         ibdev->ib_dev.reg_user_mr       = mlx4_ib_reg_user_mr;
1405         ibdev->ib_dev.dereg_mr          = mlx4_ib_dereg_mr;
1406         ibdev->ib_dev.alloc_fast_reg_mr = mlx4_ib_alloc_fast_reg_mr;
1407         ibdev->ib_dev.alloc_fast_reg_page_list = mlx4_ib_alloc_fast_reg_page_list;
1408         ibdev->ib_dev.free_fast_reg_page_list  = mlx4_ib_free_fast_reg_page_list;
1409         ibdev->ib_dev.attach_mcast      = mlx4_ib_mcg_attach;
1410         ibdev->ib_dev.detach_mcast      = mlx4_ib_mcg_detach;
1411         ibdev->ib_dev.process_mad       = mlx4_ib_process_mad;
1412
1413         if (!mlx4_is_slave(ibdev->dev)) {
1414                 ibdev->ib_dev.alloc_fmr         = mlx4_ib_fmr_alloc;
1415                 ibdev->ib_dev.map_phys_fmr      = mlx4_ib_map_phys_fmr;
1416                 ibdev->ib_dev.unmap_fmr         = mlx4_ib_unmap_fmr;
1417                 ibdev->ib_dev.dealloc_fmr       = mlx4_ib_fmr_dealloc;
1418         }
1419
1420         if (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) {
1421                 ibdev->ib_dev.alloc_xrcd = mlx4_ib_alloc_xrcd;
1422                 ibdev->ib_dev.dealloc_xrcd = mlx4_ib_dealloc_xrcd;
1423                 ibdev->ib_dev.uverbs_cmd_mask |=
1424                         (1ull << IB_USER_VERBS_CMD_OPEN_XRCD) |
1425                         (1ull << IB_USER_VERBS_CMD_CLOSE_XRCD);
1426         }
1427
1428         mlx4_ib_alloc_eqs(dev, ibdev);
1429
1430         spin_lock_init(&iboe->lock);
1431
1432         if (init_node_data(ibdev))
1433                 goto err_map;
1434
1435         for (i = 0; i < ibdev->num_ports; ++i) {
1436                 if (mlx4_ib_port_link_layer(&ibdev->ib_dev, i + 1) ==
1437                                                 IB_LINK_LAYER_ETHERNET) {
1438                         err = mlx4_counter_alloc(ibdev->dev, &ibdev->counters[i]);
1439                         if (err)
1440                                 ibdev->counters[i] = -1;
1441                 } else
1442                                 ibdev->counters[i] = -1;
1443         }
1444
1445         spin_lock_init(&ibdev->sm_lock);
1446         mutex_init(&ibdev->cap_mask_mutex);
1447
1448         if (ib_register_device(&ibdev->ib_dev, NULL))
1449                 goto err_counter;
1450
1451         if (mlx4_ib_mad_init(ibdev))
1452                 goto err_reg;
1453
1454         if (mlx4_ib_init_sriov(ibdev))
1455                 goto err_mad;
1456
1457         if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE && !iboe->nb.notifier_call) {
1458                 iboe->nb.notifier_call = mlx4_ib_netdev_event;
1459                 err = register_netdevice_notifier(&iboe->nb);
1460                 if (err)
1461                         goto err_sriov;
1462         }
1463
1464         for (j = 0; j < ARRAY_SIZE(mlx4_class_attributes); ++j) {
1465                 if (device_create_file(&ibdev->ib_dev.dev,
1466                                        mlx4_class_attributes[j]))
1467                         goto err_notif;
1468         }
1469
1470         ibdev->ib_active = true;
1471
1472         if (mlx4_is_mfunc(ibdev->dev))
1473                 init_pkeys(ibdev);
1474
1475         /* create paravirt contexts for any VFs which are active */
1476         if (mlx4_is_master(ibdev->dev)) {
1477                 for (j = 0; j < MLX4_MFUNC_MAX; j++) {
1478                         if (j == mlx4_master_func_num(ibdev->dev))
1479                                 continue;
1480                         if (mlx4_is_slave_active(ibdev->dev, j))
1481                                 do_slave_init(ibdev, j, 1);
1482                 }
1483         }
1484         return ibdev;
1485
1486 err_notif:
1487         if (unregister_netdevice_notifier(&ibdev->iboe.nb))
1488                 pr_warn("failure unregistering notifier\n");
1489         flush_workqueue(wq);
1490
1491 err_sriov:
1492         mlx4_ib_close_sriov(ibdev);
1493
1494 err_mad:
1495         mlx4_ib_mad_cleanup(ibdev);
1496
1497 err_reg:
1498         ib_unregister_device(&ibdev->ib_dev);
1499
1500 err_counter:
1501         for (; i; --i)
1502                 if (ibdev->counters[i - 1] != -1)
1503                         mlx4_counter_free(ibdev->dev, ibdev->counters[i - 1]);
1504
1505 err_map:
1506         iounmap(ibdev->uar_map);
1507
1508 err_uar:
1509         mlx4_uar_free(dev, &ibdev->priv_uar);
1510
1511 err_pd:
1512         mlx4_pd_free(dev, ibdev->priv_pdn);
1513
1514 err_dealloc:
1515         ib_dealloc_device(&ibdev->ib_dev);
1516
1517         return NULL;
1518 }
1519
1520 static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
1521 {
1522         struct mlx4_ib_dev *ibdev = ibdev_ptr;
1523         int p;
1524
1525         mlx4_ib_close_sriov(ibdev);
1526         mlx4_ib_mad_cleanup(ibdev);
1527         ib_unregister_device(&ibdev->ib_dev);
1528         if (ibdev->iboe.nb.notifier_call) {
1529                 if (unregister_netdevice_notifier(&ibdev->iboe.nb))
1530                         pr_warn("failure unregistering notifier\n");
1531                 ibdev->iboe.nb.notifier_call = NULL;
1532         }
1533         iounmap(ibdev->uar_map);
1534         for (p = 0; p < ibdev->num_ports; ++p)
1535                 if (ibdev->counters[p] != -1)
1536                         mlx4_counter_free(ibdev->dev, ibdev->counters[p]);
1537         mlx4_foreach_port(p, dev, MLX4_PORT_TYPE_IB)
1538                 mlx4_CLOSE_PORT(dev, p);
1539
1540         mlx4_ib_free_eqs(dev, ibdev);
1541
1542         mlx4_uar_free(dev, &ibdev->priv_uar);
1543         mlx4_pd_free(dev, ibdev->priv_pdn);
1544         ib_dealloc_device(&ibdev->ib_dev);
1545 }
1546
1547 static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init)
1548 {
1549         struct mlx4_ib_demux_work **dm = NULL;
1550         struct mlx4_dev *dev = ibdev->dev;
1551         int i;
1552         unsigned long flags;
1553
1554         if (!mlx4_is_master(dev))
1555                 return;
1556
1557         dm = kcalloc(dev->caps.num_ports, sizeof *dm, GFP_ATOMIC);
1558         if (!dm) {
1559                 pr_err("failed to allocate memory for tunneling qp update\n");
1560                 goto out;
1561         }
1562
1563         for (i = 0; i < dev->caps.num_ports; i++) {
1564                 dm[i] = kmalloc(sizeof (struct mlx4_ib_demux_work), GFP_ATOMIC);
1565                 if (!dm[i]) {
1566                         pr_err("failed to allocate memory for tunneling qp update work struct\n");
1567                         for (i = 0; i < dev->caps.num_ports; i++) {
1568                                 if (dm[i])
1569                                         kfree(dm[i]);
1570                         }
1571                         goto out;
1572                 }
1573         }
1574         /* initialize or tear down tunnel QPs for the slave */
1575         for (i = 0; i < dev->caps.num_ports; i++) {
1576                 INIT_WORK(&dm[i]->work, mlx4_ib_tunnels_update_work);
1577                 dm[i]->port = i + 1;
1578                 dm[i]->slave = slave;
1579                 dm[i]->do_init = do_init;
1580                 dm[i]->dev = ibdev;
1581                 spin_lock_irqsave(&ibdev->sriov.going_down_lock, flags);
1582                 if (!ibdev->sriov.is_going_down)
1583                         queue_work(ibdev->sriov.demux[i].ud_wq, &dm[i]->work);
1584                 spin_unlock_irqrestore(&ibdev->sriov.going_down_lock, flags);
1585         }
1586 out:
1587         if (dm)
1588                 kfree(dm);
1589         return;
1590 }
1591
1592 static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
1593                           enum mlx4_dev_event event, unsigned long param)
1594 {
1595         struct ib_event ibev;
1596         struct mlx4_ib_dev *ibdev = to_mdev((struct ib_device *) ibdev_ptr);
1597         struct mlx4_eqe *eqe = NULL;
1598         struct ib_event_work *ew;
1599         int p = 0;
1600
1601         if (event == MLX4_DEV_EVENT_PORT_MGMT_CHANGE)
1602                 eqe = (struct mlx4_eqe *)param;
1603         else
1604                 p = (int) param;
1605
1606         switch (event) {
1607         case MLX4_DEV_EVENT_PORT_UP:
1608                 if (p > ibdev->num_ports)
1609                         return;
1610                 if (mlx4_is_master(dev) &&
1611                     rdma_port_get_link_layer(&ibdev->ib_dev, p) ==
1612                         IB_LINK_LAYER_INFINIBAND) {
1613                         mlx4_ib_invalidate_all_guid_record(ibdev, p);
1614                 }
1615                 ibev.event = IB_EVENT_PORT_ACTIVE;
1616                 break;
1617
1618         case MLX4_DEV_EVENT_PORT_DOWN:
1619                 if (p > ibdev->num_ports)
1620                         return;
1621                 ibev.event = IB_EVENT_PORT_ERR;
1622                 break;
1623
1624         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
1625                 ibdev->ib_active = false;
1626                 ibev.event = IB_EVENT_DEVICE_FATAL;
1627                 break;
1628
1629         case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
1630                 ew = kmalloc(sizeof *ew, GFP_ATOMIC);
1631                 if (!ew) {
1632                         pr_err("failed to allocate memory for events work\n");
1633                         break;
1634                 }
1635
1636                 INIT_WORK(&ew->work, handle_port_mgmt_change_event);
1637                 memcpy(&ew->ib_eqe, eqe, sizeof *eqe);
1638                 ew->ib_dev = ibdev;
1639                 /* need to queue only for port owner, which uses GEN_EQE */
1640                 if (mlx4_is_master(dev))
1641                         queue_work(wq, &ew->work);
1642                 else
1643                         handle_port_mgmt_change_event(&ew->work);
1644                 return;
1645
1646         case MLX4_DEV_EVENT_SLAVE_INIT:
1647                 /* here, p is the slave id */
1648                 do_slave_init(ibdev, p, 1);
1649                 return;
1650
1651         case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
1652                 /* here, p is the slave id */
1653                 do_slave_init(ibdev, p, 0);
1654                 return;
1655
1656         default:
1657                 return;
1658         }
1659
1660         ibev.device           = ibdev_ptr;
1661         ibev.element.port_num = (u8) p;
1662
1663         ib_dispatch_event(&ibev);
1664 }
1665
1666 static struct mlx4_interface mlx4_ib_interface = {
1667         .add            = mlx4_ib_add,
1668         .remove         = mlx4_ib_remove,
1669         .event          = mlx4_ib_event,
1670         .protocol       = MLX4_PROT_IB_IPV6
1671 };
1672
1673 static int __init mlx4_ib_init(void)
1674 {
1675         int err;
1676
1677         wq = create_singlethread_workqueue("mlx4_ib");
1678         if (!wq)
1679                 return -ENOMEM;
1680
1681         err = mlx4_ib_mcg_init();
1682         if (err)
1683                 goto clean_wq;
1684
1685         err = mlx4_register_interface(&mlx4_ib_interface);
1686         if (err)
1687                 goto clean_mcg;
1688
1689         return 0;
1690
1691 clean_mcg:
1692         mlx4_ib_mcg_destroy();
1693
1694 clean_wq:
1695         destroy_workqueue(wq);
1696         return err;
1697 }
1698
1699 static void __exit mlx4_ib_cleanup(void)
1700 {
1701         mlx4_unregister_interface(&mlx4_ib_interface);
1702         mlx4_ib_mcg_destroy();
1703         destroy_workqueue(wq);
1704 }
1705
1706 module_init(mlx4_ib_init);
1707 module_exit(mlx4_ib_cleanup);