drivers/net/ethernet/mellanox/mlx4/mcg.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/string.h>
  35 #include <linux/etherdevice.h>
  36
  37 #include <linux/mlx4/cmd.h>
  38 #include <linux/export.h>
  39
  40 #include "mlx4.h"
  41
  42 static const u8 zero_gid[16];   /* automatically initialized to 0 */
  43
  44 int mlx4_get_mgm_entry_size(struct mlx4_dev *dev)
  45 {
  46         return 1 << dev->oper_log_mgm_entry_size;
  47 }
  48
  49 int mlx4_get_qp_per_mgm(struct mlx4_dev *dev)
  50 {
  51         return 4 * (mlx4_get_mgm_entry_size(dev) / 16 - 2);
  52 }
  53
  54 static int mlx4_QP_FLOW_STEERING_ATTACH(struct mlx4_dev *dev,
  55                                         struct mlx4_cmd_mailbox *mailbox,
  56                                         u32 size,
  57                                         u64 *reg_id)
  58 {
  59         u64 imm;
  60         int err = 0;
  61
  62         err = mlx4_cmd_imm(dev, mailbox->dma, &imm, size, 0,
  63                            MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
  64                            MLX4_CMD_NATIVE);
  65         if (err)
  66                 return err;
  67         *reg_id = imm;
  68
  69         return err;
  70 }
  71
  72 static int mlx4_QP_FLOW_STEERING_DETACH(struct mlx4_dev *dev, u64 regid)
  73 {
  74         int err = 0;
  75
  76         err = mlx4_cmd(dev, regid, 0, 0,
  77                        MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
  78                        MLX4_CMD_NATIVE);
  79
  80         return err;
  81 }
  82
  83 static int mlx4_READ_ENTRY(struct mlx4_dev *dev, int index,
  84                            struct mlx4_cmd_mailbox *mailbox)
  85 {
  86         return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG,
  87                             MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
  88 }
  89
  90 static int mlx4_WRITE_ENTRY(struct mlx4_dev *dev, int index,
  91                             struct mlx4_cmd_mailbox *mailbox)
  92 {
  93         return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG,
  94                         MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
  95 }
  96
  97 static int mlx4_WRITE_PROMISC(struct mlx4_dev *dev, u8 port, u8 steer,
  98                               struct mlx4_cmd_mailbox *mailbox)
  99 {
 100         u32 in_mod;
 101
 102         in_mod = (u32) port << 16 | steer << 1;
 103         return mlx4_cmd(dev, mailbox->dma, in_mod, 0x1,
 104                         MLX4_CMD_WRITE_MCG, MLX4_CMD_TIME_CLASS_A,
 105                         MLX4_CMD_NATIVE);
 106 }
 107
 108 static int mlx4_GID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 109                          u16 *hash, u8 op_mod)
 110 {
 111         u64 imm;
 112         int err;
 113
 114         err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, op_mod,
 115                            MLX4_CMD_MGID_HASH, MLX4_CMD_TIME_CLASS_A,
 116                            MLX4_CMD_NATIVE);
 117
 118         if (!err)
 119                 *hash = imm;
 120
 121         return err;
 122 }
 123
 124 static struct mlx4_promisc_qp *get_promisc_qp(struct mlx4_dev *dev, u8 port,
 125                                               enum mlx4_steer_type steer,
 126                                               u32 qpn)
 127 {
 128         struct mlx4_steer *s_steer;
 129         struct mlx4_promisc_qp *pqp;
 130
 131         if (port < 1 || port > dev->caps.num_ports)
 132                 return NULL;
 133
 134         s_steer = &mlx4_priv(dev)->steer[port - 1];
 135
 136         list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {
 137                 if (pqp->qpn == qpn)
 138                         return pqp;
 139         }
 140         /* not found */
 141         return NULL;
 142 }
 143
 144 /*
 145  * Add new entry to steering data structure.
 146  * All promisc QPs should be added as well
 147  */
 148 static int new_steering_entry(struct mlx4_dev *dev, u8 port,
 149                               enum mlx4_steer_type steer,
 150                               unsigned int index, u32 qpn)
 151 {
 152         struct mlx4_steer *s_steer;
 153         struct mlx4_cmd_mailbox *mailbox;
 154         struct mlx4_mgm *mgm;
 155         u32 members_count;
 156         struct mlx4_steer_index *new_entry;
 157         struct mlx4_promisc_qp *pqp;
 158         struct mlx4_promisc_qp *dqp = NULL;
 159         u32 prot;
 160         int err;
 161
 162         if (port < 1 || port > dev->caps.num_ports)
 163                 return -EINVAL;
 164
 165         s_steer = &mlx4_priv(dev)->steer[port - 1];
 166         new_entry = kzalloc(sizeof *new_entry, GFP_KERNEL);
 167         if (!new_entry)
 168                 return -ENOMEM;
 169
 170         INIT_LIST_HEAD(&new_entry->duplicates);
 171         new_entry->index = index;
 172         list_add_tail(&new_entry->list, &s_steer->steer_entries[steer]);
 173
 174         /* If the given qpn is also a promisc qp,
 175          * it should be inserted to duplicates list
 176          */
 177         pqp = get_promisc_qp(dev, port, steer, qpn);
 178         if (pqp) {
 179                 dqp = kmalloc(sizeof *dqp, GFP_KERNEL);
 180                 if (!dqp) {
 181                         err = -ENOMEM;
 182                         goto out_alloc;
 183                 }
 184                 dqp->qpn = qpn;
 185                 list_add_tail(&dqp->list, &new_entry->duplicates);
 186         }
 187
 188         /* if no promisc qps for this vep, we are done */
 189         if (list_empty(&s_steer->promisc_qps[steer]))
 190                 return 0;
 191
 192         /* now need to add all the promisc qps to the new
 193          * steering entry, as they should also receive the packets
 194          * destined to this address */
 195         mailbox = mlx4_alloc_cmd_mailbox(dev);
 196         if (IS_ERR(mailbox)) {
 197                 err = -ENOMEM;
 198                 goto out_alloc;
 199         }
 200         mgm = mailbox->buf;
 201
 202         err = mlx4_READ_ENTRY(dev, index, mailbox);
 203         if (err)
 204                 goto out_mailbox;
 205
 206         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 207         prot = be32_to_cpu(mgm->members_count) >> 30;
 208         list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {
 209                 /* don't add already existing qpn */
 210                 if (pqp->qpn == qpn)
 211                         continue;
 212                 if (members_count == dev->caps.num_qp_per_mgm) {
 213                         /* out of space */
 214                         err = -ENOMEM;
 215                         goto out_mailbox;
 216                 }
 217
 218                 /* add the qpn */
 219                 mgm->qp[members_count++] = cpu_to_be32(pqp->qpn & MGM_QPN_MASK);
 220         }
 221         /* update the qps count and update the entry with all the promisc qps*/
 222         mgm->members_count = cpu_to_be32(members_count | (prot << 30));
 223         err = mlx4_WRITE_ENTRY(dev, index, mailbox);
 224
 225 out_mailbox:
 226         mlx4_free_cmd_mailbox(dev, mailbox);
 227         if (!err)
 228                 return 0;
 229 out_alloc:
 230         if (dqp) {
 231                 list_del(&dqp->list);
 232                 kfree(dqp);
 233         }
 234         list_del(&new_entry->list);
 235         kfree(new_entry);
 236         return err;
 237 }
 238
 239 /* update the data structures with existing steering entry */
 240 static int existing_steering_entry(struct mlx4_dev *dev, u8 port,
 241                                    enum mlx4_steer_type steer,
 242                                    unsigned int index, u32 qpn)
 243 {
 244         struct mlx4_steer *s_steer;
 245         struct mlx4_steer_index *tmp_entry, *entry = NULL;
 246         struct mlx4_promisc_qp *pqp;
 247         struct mlx4_promisc_qp *dqp;
 248
 249         if (port < 1 || port > dev->caps.num_ports)
 250                 return -EINVAL;
 251
 252         s_steer = &mlx4_priv(dev)->steer[port - 1];
 253
 254         pqp = get_promisc_qp(dev, port, steer, qpn);
 255         if (!pqp)
 256                 return 0; /* nothing to do */
 257
 258         list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {
 259                 if (tmp_entry->index == index) {
 260                         entry = tmp_entry;
 261                         break;
 262                 }
 263         }
 264         if (unlikely(!entry)) {
 265                 mlx4_warn(dev, "Steering entry at index %x is not registered\n", index);
 266                 return -EINVAL;
 267         }
 268
 269         /* the given qpn is listed as a promisc qpn
 270          * we need to add it as a duplicate to this entry
 271          * for future references */
 272         list_for_each_entry(dqp, &entry->duplicates, list) {
 273                 if (qpn == dqp->qpn)
 274                         return 0; /* qp is already duplicated */
 275         }
 276
 277         /* add the qp as a duplicate on this index */
 278         dqp = kmalloc(sizeof *dqp, GFP_KERNEL);
 279         if (!dqp)
 280                 return -ENOMEM;
 281         dqp->qpn = qpn;
 282         list_add_tail(&dqp->list, &entry->duplicates);
 283
 284         return 0;
 285 }
 286
 287 /* Check whether a qpn is a duplicate on steering entry
 288  * If so, it should not be removed from mgm */
 289 static bool check_duplicate_entry(struct mlx4_dev *dev, u8 port,
 290                                   enum mlx4_steer_type steer,
 291                                   unsigned int index, u32 qpn)
 292 {
 293         struct mlx4_steer *s_steer;
 294         struct mlx4_steer_index *tmp_entry, *entry = NULL;
 295         struct mlx4_promisc_qp *dqp, *tmp_dqp;
 296
 297         if (port < 1 || port > dev->caps.num_ports)
 298                 return NULL;
 299
 300         s_steer = &mlx4_priv(dev)->steer[port - 1];
 301
 302         /* if qp is not promisc, it cannot be duplicated */
 303         if (!get_promisc_qp(dev, port, steer, qpn))
 304                 return false;
 305
 306         /* The qp is promisc qp so it is a duplicate on this index
 307          * Find the index entry, and remove the duplicate */
 308         list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {
 309                 if (tmp_entry->index == index) {
 310                         entry = tmp_entry;
 311                         break;
 312                 }
 313         }
 314         if (unlikely(!entry)) {
 315                 mlx4_warn(dev, "Steering entry for index %x is not registered\n", index);
 316                 return false;
 317         }
 318         list_for_each_entry_safe(dqp, tmp_dqp, &entry->duplicates, list) {
 319                 if (dqp->qpn == qpn) {
 320                         list_del(&dqp->list);
 321                         kfree(dqp);
 322                 }
 323         }
 324         return true;
 325 }
 326
 327 /* Returns true if all the QPs != tqpn contained in this entry
 328  * are Promisc QPs. Returns false otherwise.
 329  */
 330 static bool promisc_steering_entry(struct mlx4_dev *dev, u8 port,
 331                                    enum mlx4_steer_type steer,
 332                                    unsigned int index, u32 tqpn,
 333                                    u32 *members_count)
 334 {
 335         struct mlx4_cmd_mailbox *mailbox;
 336         struct mlx4_mgm *mgm;
 337         u32 m_count;
 338         bool ret = false;
 339         int i;
 340
 341         if (port < 1 || port > dev->caps.num_ports)
 342                 return false;
 343
 344         mailbox = mlx4_alloc_cmd_mailbox(dev);
 345         if (IS_ERR(mailbox))
 346                 return false;
 347         mgm = mailbox->buf;
 348
 349         if (mlx4_READ_ENTRY(dev, index, mailbox))
 350                 goto out;
 351         m_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 352         if (members_count)
 353                 *members_count = m_count;
 354
 355         for (i = 0;  i < m_count; i++) {
 356                 u32 qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK;
 357                 if (!get_promisc_qp(dev, port, steer, qpn) && qpn != tqpn) {
 358                         /* the qp is not promisc, the entry can't be removed */
 359                         goto out;
 360                 }
 361         }
 362         ret = true;
 363 out:
 364         mlx4_free_cmd_mailbox(dev, mailbox);
 365         return ret;
 366 }
 367
 368 /* IF a steering entry contains only promisc QPs, it can be removed. */
 369 static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
 370                                       enum mlx4_steer_type steer,
 371                                       unsigned int index, u32 tqpn)
 372 {
 373         struct mlx4_steer *s_steer;
 374         struct mlx4_steer_index *entry = NULL, *tmp_entry;
 375         u32 members_count;
 376         bool ret = false;
 377
 378         if (port < 1 || port > dev->caps.num_ports)
 379                 return NULL;
 380
 381         s_steer = &mlx4_priv(dev)->steer[port - 1];
 382
 383         if (!promisc_steering_entry(dev, port, steer, index,
 384                                     tqpn, &members_count))
 385                 goto out;
 386
 387         /* All the qps currently registered for this entry are promiscuous,
 388           * Checking for duplicates */
 389         ret = true;
 390         list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) {
 391                 if (entry->index == index) {
 392                         if (list_empty(&entry->duplicates) ||
 393                             members_count == 1) {
 394                                 struct mlx4_promisc_qp *pqp, *tmp_pqp;
 395                                 /* If there is only 1 entry in duplicates then
 396                                  * this is the QP we want to delete, going over
 397                                  * the list and deleting the entry.
 398                                  */
 399                                 list_del(&entry->list);
 400                                 list_for_each_entry_safe(pqp, tmp_pqp,
 401                                                          &entry->duplicates,
 402                                                          list) {
 403                                         list_del(&pqp->list);
 404                                         kfree(pqp);
 405                                 }
 406                                 kfree(entry);
 407                         } else {
 408                                 /* This entry contains duplicates so it shouldn't be removed */
 409                                 ret = false;
 410                                 goto out;
 411                         }
 412                 }
 413         }
 414
 415 out:
 416         return ret;
 417 }
 418
 419 static int add_promisc_qp(struct mlx4_dev *dev, u8 port,
 420                           enum mlx4_steer_type steer, u32 qpn)
 421 {
 422         struct mlx4_steer *s_steer;
 423         struct mlx4_cmd_mailbox *mailbox;
 424         struct mlx4_mgm *mgm;
 425         struct mlx4_steer_index *entry;
 426         struct mlx4_promisc_qp *pqp;
 427         struct mlx4_promisc_qp *dqp;
 428         u32 members_count;
 429         u32 prot;
 430         int i;
 431         bool found;
 432         int err;
 433         struct mlx4_priv *priv = mlx4_priv(dev);
 434
 435         if (port < 1 || port > dev->caps.num_ports)
 436                 return -EINVAL;
 437
 438         s_steer = &mlx4_priv(dev)->steer[port - 1];
 439
 440         mutex_lock(&priv->mcg_table.mutex);
 441
 442         if (get_promisc_qp(dev, port, steer, qpn)) {
 443                 err = 0;  /* Noting to do, already exists */
 444                 goto out_mutex;
 445         }
 446
 447         pqp = kmalloc(sizeof *pqp, GFP_KERNEL);
 448         if (!pqp) {
 449                 err = -ENOMEM;
 450                 goto out_mutex;
 451         }
 452         pqp->qpn = qpn;
 453
 454         mailbox = mlx4_alloc_cmd_mailbox(dev);
 455         if (IS_ERR(mailbox)) {
 456                 err = -ENOMEM;
 457                 goto out_alloc;
 458         }
 459         mgm = mailbox->buf;
 460
 461         if (!(mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)) {
 462                 /* The promisc QP needs to be added for each one of the steering
 463                  * entries. If it already exists, needs to be added as
 464                  * a duplicate for this entry.
 465                  */
 466                 list_for_each_entry(entry,
 467                                     &s_steer->steer_entries[steer],
 468                                     list) {
 469                         err = mlx4_READ_ENTRY(dev, entry->index, mailbox);
 470                         if (err)
 471                                 goto out_mailbox;
 472
 473                         members_count = be32_to_cpu(mgm->members_count) &
 474                                         0xffffff;
 475                         prot = be32_to_cpu(mgm->members_count) >> 30;
 476                         found = false;
 477                         for (i = 0; i < members_count; i++) {
 478                                 if ((be32_to_cpu(mgm->qp[i]) &
 479                                      MGM_QPN_MASK) == qpn) {
 480                                         /* Entry already exists.
 481                                          * Add to duplicates.
 482                                          */
 483                                         dqp = kmalloc(sizeof(*dqp), GFP_KERNEL);
 484                                         if (!dqp) {
 485                                                 err = -ENOMEM;
 486                                                 goto out_mailbox;
 487                                         }
 488                                         dqp->qpn = qpn;
 489                                         list_add_tail(&dqp->list,
 490                                                       &entry->duplicates);
 491                                         found = true;
 492                                 }
 493                         }
 494                         if (!found) {
 495                                 /* Need to add the qpn to mgm */
 496                                 if (members_count ==
 497                                     dev->caps.num_qp_per_mgm) {
 498                                         /* entry is full */
 499                                         err = -ENOMEM;
 500                                         goto out_mailbox;
 501                                 }
 502                                 mgm->qp[members_count++] =
 503                                         cpu_to_be32(qpn & MGM_QPN_MASK);
 504                                 mgm->members_count =
 505                                         cpu_to_be32(members_count |
 506                                                     (prot << 30));
 507                                 err = mlx4_WRITE_ENTRY(dev, entry->index,
 508                                                        mailbox);
 509                                 if (err)
 510                                         goto out_mailbox;
 511                         }
 512                 }
 513         }
 514
 515         /* add the new qpn to list of promisc qps */
 516         list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
 517         /* now need to add all the promisc qps to default entry */
 518         memset(mgm, 0, sizeof *mgm);
 519         members_count = 0;
 520         list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list) {
 521                 if (members_count == dev->caps.num_qp_per_mgm) {
 522                         /* entry is full */
 523                         err = -ENOMEM;
 524                         goto out_list;
 525                 }
 526                 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
 527         }
 528         mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
 529
 530         err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);
 531         if (err)
 532                 goto out_list;
 533
 534         mlx4_free_cmd_mailbox(dev, mailbox);
 535         mutex_unlock(&priv->mcg_table.mutex);
 536         return 0;
 537
 538 out_list:
 539         list_del(&pqp->list);
 540 out_mailbox:
 541         mlx4_free_cmd_mailbox(dev, mailbox);
 542 out_alloc:
 543         kfree(pqp);
 544 out_mutex:
 545         mutex_unlock(&priv->mcg_table.mutex);
 546         return err;
 547 }
 548
 549 static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
 550                              enum mlx4_steer_type steer, u32 qpn)
 551 {
 552         struct mlx4_priv *priv = mlx4_priv(dev);
 553         struct mlx4_steer *s_steer;
 554         struct mlx4_cmd_mailbox *mailbox;
 555         struct mlx4_mgm *mgm;
 556         struct mlx4_steer_index *entry, *tmp_entry;
 557         struct mlx4_promisc_qp *pqp;
 558         struct mlx4_promisc_qp *dqp;
 559         u32 members_count;
 560         bool found;
 561         bool back_to_list = false;
 562         int i;
 563         int err;
 564
 565         if (port < 1 || port > dev->caps.num_ports)
 566                 return -EINVAL;
 567
 568         s_steer = &mlx4_priv(dev)->steer[port - 1];
 569         mutex_lock(&priv->mcg_table.mutex);
 570
 571         pqp = get_promisc_qp(dev, port, steer, qpn);
 572         if (unlikely(!pqp)) {
 573                 mlx4_warn(dev, "QP %x is not promiscuous QP\n", qpn);
 574                 /* nothing to do */
 575                 err = 0;
 576                 goto out_mutex;
 577         }
 578
 579         /*remove from list of promisc qps */
 580         list_del(&pqp->list);
 581
 582         /* set the default entry not to include the removed one */
 583         mailbox = mlx4_alloc_cmd_mailbox(dev);
 584         if (IS_ERR(mailbox)) {
 585                 err = -ENOMEM;
 586                 back_to_list = true;
 587                 goto out_list;
 588         }
 589         mgm = mailbox->buf;
 590         members_count = 0;
 591         list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)
 592                 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
 593         mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
 594
 595         err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);
 596         if (err)
 597                 goto out_mailbox;
 598
 599         if (!(mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)) {
 600                 /* Remove the QP from all the steering entries */
 601                 list_for_each_entry_safe(entry, tmp_entry,
 602                                          &s_steer->steer_entries[steer],
 603                                          list) {
 604                         found = false;
 605                         list_for_each_entry(dqp, &entry->duplicates, list) {
 606                                 if (dqp->qpn == qpn) {
 607                                         found = true;
 608                                         break;
 609                                 }
 610                         }
 611                         if (found) {
 612                                 /* A duplicate, no need to change the MGM,
 613                                  * only update the duplicates list
 614                                  */
 615                                 list_del(&dqp->list);
 616                                 kfree(dqp);
 617                         } else {
 618                                 int loc = -1;
 619
 620                                 err = mlx4_READ_ENTRY(dev,
 621                                                       entry->index,
 622                                                       mailbox);
 623                                         if (err)
 624                                                 goto out_mailbox;
 625                                 members_count =
 626                                         be32_to_cpu(mgm->members_count) &
 627                                         0xffffff;
 628                                 if (!members_count) {
 629                                         mlx4_warn(dev, "QP %06x wasn't found in entry %x mcount=0. deleting entry...\n",
 630                                                   qpn, entry->index);
 631                                         list_del(&entry->list);
 632                                         kfree(entry);
 633                                         continue;
 634                                 }
 635
 636                                 for (i = 0; i < members_count; ++i)
 637                                         if ((be32_to_cpu(mgm->qp[i]) &
 638                                              MGM_QPN_MASK) == qpn) {
 639                                                 loc = i;
 640                                                 break;
 641                                         }
 642
 643                                 if (loc < 0) {
 644                                         mlx4_err(dev, "QP %06x wasn't found in entry %d\n",
 645                                                  qpn, entry->index);
 646                                         err = -EINVAL;
 647                                         goto out_mailbox;
 648                                 }
 649
 650                                 /* Copy the last QP in this MGM
 651                                  * over removed QP
 652                                  */
 653                                 mgm->qp[loc] = mgm->qp[members_count - 1];
 654                                 mgm->qp[members_count - 1] = 0;
 655                                 mgm->members_count =
 656                                         cpu_to_be32(--members_count |
 657                                                     (MLX4_PROT_ETH << 30));
 658
 659                                 err = mlx4_WRITE_ENTRY(dev,
 660                                                        entry->index,
 661                                                        mailbox);
 662                                         if (err)
 663                                                 goto out_mailbox;
 664                         }
 665                 }
 666         }
 667
 668 out_mailbox:
 669         mlx4_free_cmd_mailbox(dev, mailbox);
 670 out_list:
 671         if (back_to_list)
 672                 list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
 673         else
 674                 kfree(pqp);
 675 out_mutex:
 676         mutex_unlock(&priv->mcg_table.mutex);
 677         return err;
 678 }
 679
 680 /*
 681  * Caller must hold MCG table semaphore.  gid and mgm parameters must
 682  * be properly aligned for command interface.
 683  *
 684  *  Returns 0 unless a firmware command error occurs.
 685  *
 686  * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
 687  * and *mgm holds MGM entry.
 688  *
 689  * if GID is found in AMGM, *index = index in AMGM, *prev = index of
 690  * previous entry in hash chain and *mgm holds AMGM entry.
 691  *
 692  * If no AMGM exists for given gid, *index = -1, *prev = index of last
 693  * entry in hash chain and *mgm holds end of hash chain.
 694  */
 695 static int find_entry(struct mlx4_dev *dev, u8 port,
 696                       u8 *gid, enum mlx4_protocol prot,
 697                       struct mlx4_cmd_mailbox *mgm_mailbox,
 698                       int *prev, int *index)
 699 {
 700         struct mlx4_cmd_mailbox *mailbox;
 701         struct mlx4_mgm *mgm = mgm_mailbox->buf;
 702         u8 *mgid;
 703         int err;
 704         u16 hash;
 705         u8 op_mod = (prot == MLX4_PROT_ETH) ?
 706                 !!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) : 0;
 707
 708         mailbox = mlx4_alloc_cmd_mailbox(dev);
 709         if (IS_ERR(mailbox))
 710                 return -ENOMEM;
 711         mgid = mailbox->buf;
 712
 713         memcpy(mgid, gid, 16);
 714
 715         err = mlx4_GID_HASH(dev, mailbox, &hash, op_mod);
 716         mlx4_free_cmd_mailbox(dev, mailbox);
 717         if (err)
 718                 return err;
 719
 720         if (0)
 721                 mlx4_dbg(dev, "Hash for %pI6 is %04x\n", gid, hash);
 722
 723         *index = hash;
 724         *prev  = -1;
 725
 726         do {
 727                 err = mlx4_READ_ENTRY(dev, *index, mgm_mailbox);
 728                 if (err)
 729                         return err;
 730
 731                 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
 732                         if (*index != hash) {
 733                                 mlx4_err(dev, "Found zero MGID in AMGM\n");
 734                                 err = -EINVAL;
 735                         }
 736                         return err;
 737                 }
 738
 739                 if (!memcmp(mgm->gid, gid, 16) &&
 740                     be32_to_cpu(mgm->members_count) >> 30 == prot)
 741                         return err;
 742
 743                 *prev = *index;
 744                 *index = be32_to_cpu(mgm->next_gid_index) >> 6;
 745         } while (*index);
 746
 747         *index = -1;
 748         return err;
 749 }
 750
 751 static const u8 __promisc_mode[] = {
 752         [MLX4_FS_REGULAR]   = 0x0,
 753         [MLX4_FS_ALL_DEFAULT] = 0x1,
 754         [MLX4_FS_MC_DEFAULT] = 0x3,
 755         [MLX4_FS_UC_SNIFFER] = 0x4,
 756         [MLX4_FS_MC_SNIFFER] = 0x5,
 757 };
 758
 759 int mlx4_map_sw_to_hw_steering_mode(struct mlx4_dev *dev,
 760                                     enum mlx4_net_trans_promisc_mode flow_type)
 761 {
 762         if (flow_type >= MLX4_FS_MODE_NUM) {
 763                 mlx4_err(dev, "Invalid flow type. type = %d\n", flow_type);
 764                 return -EINVAL;
 765         }
 766         return __promisc_mode[flow_type];
 767 }
 768 EXPORT_SYMBOL_GPL(mlx4_map_sw_to_hw_steering_mode);
 769
 770 static void trans_rule_ctrl_to_hw(struct mlx4_net_trans_rule *ctrl,
 771                                   struct mlx4_net_trans_rule_hw_ctrl *hw)
 772 {
 773         u8 flags = 0;
 774
 775         flags = ctrl->queue_mode == MLX4_NET_TRANS_Q_LIFO ? 1 : 0;
 776         flags |= ctrl->exclusive ? (1 << 2) : 0;
 777         flags |= ctrl->allow_loopback ? (1 << 3) : 0;
 778
 779         hw->flags = flags;
 780         hw->type = __promisc_mode[ctrl->promisc_mode];
 781         hw->prio = cpu_to_be16(ctrl->priority);
 782         hw->port = ctrl->port;
 783         hw->qpn = cpu_to_be32(ctrl->qpn);
 784 }
 785
 786 const u16 __sw_id_hw[] = {
 787         [MLX4_NET_TRANS_RULE_ID_ETH]     = 0xE001,
 788         [MLX4_NET_TRANS_RULE_ID_IB]      = 0xE005,
 789         [MLX4_NET_TRANS_RULE_ID_IPV6]    = 0xE003,
 790         [MLX4_NET_TRANS_RULE_ID_IPV4]    = 0xE002,
 791         [MLX4_NET_TRANS_RULE_ID_TCP]     = 0xE004,
 792         [MLX4_NET_TRANS_RULE_ID_UDP]     = 0xE006,
 793         [MLX4_NET_TRANS_RULE_ID_VXLAN]   = 0xE008
 794 };
 795
 796 int mlx4_map_sw_to_hw_steering_id(struct mlx4_dev *dev,
 797                                   enum mlx4_net_trans_rule_id id)
 798 {
 799         if (id >= MLX4_NET_TRANS_RULE_NUM) {
 800                 mlx4_err(dev, "Invalid network rule id. id = %d\n", id);
 801                 return -EINVAL;
 802         }
 803         return __sw_id_hw[id];
 804 }
 805 EXPORT_SYMBOL_GPL(mlx4_map_sw_to_hw_steering_id);
 806
 807 static const int __rule_hw_sz[] = {
 808         [MLX4_NET_TRANS_RULE_ID_ETH] =
 809                 sizeof(struct mlx4_net_trans_rule_hw_eth),
 810         [MLX4_NET_TRANS_RULE_ID_IB] =
 811                 sizeof(struct mlx4_net_trans_rule_hw_ib),
 812         [MLX4_NET_TRANS_RULE_ID_IPV6] = 0,
 813         [MLX4_NET_TRANS_RULE_ID_IPV4] =
 814                 sizeof(struct mlx4_net_trans_rule_hw_ipv4),
 815         [MLX4_NET_TRANS_RULE_ID_TCP] =
 816                 sizeof(struct mlx4_net_trans_rule_hw_tcp_udp),
 817         [MLX4_NET_TRANS_RULE_ID_UDP] =
 818                 sizeof(struct mlx4_net_trans_rule_hw_tcp_udp),
 819         [MLX4_NET_TRANS_RULE_ID_VXLAN] =
 820                 sizeof(struct mlx4_net_trans_rule_hw_vxlan)
 821 };
 822
 823 int mlx4_hw_rule_sz(struct mlx4_dev *dev,
 824                enum mlx4_net_trans_rule_id id)
 825 {
 826         if (id >= MLX4_NET_TRANS_RULE_NUM) {
 827                 mlx4_err(dev, "Invalid network rule id. id = %d\n", id);
 828                 return -EINVAL;
 829         }
 830
 831         return __rule_hw_sz[id];
 832 }
 833 EXPORT_SYMBOL_GPL(mlx4_hw_rule_sz);
 834
 835 static int parse_trans_rule(struct mlx4_dev *dev, struct mlx4_spec_list *spec,
 836                             struct _rule_hw *rule_hw)
 837 {
 838         if (mlx4_hw_rule_sz(dev, spec->id) < 0)
 839                 return -EINVAL;
 840         memset(rule_hw, 0, mlx4_hw_rule_sz(dev, spec->id));
 841         rule_hw->id = cpu_to_be16(__sw_id_hw[spec->id]);
 842         rule_hw->size = mlx4_hw_rule_sz(dev, spec->id) >> 2;
 843
 844         switch (spec->id) {
 845         case MLX4_NET_TRANS_RULE_ID_ETH:
 846                 memcpy(rule_hw->eth.dst_mac, spec->eth.dst_mac, ETH_ALEN);
 847                 memcpy(rule_hw->eth.dst_mac_msk, spec->eth.dst_mac_msk,
 848                        ETH_ALEN);
 849                 memcpy(rule_hw->eth.src_mac, spec->eth.src_mac, ETH_ALEN);
 850                 memcpy(rule_hw->eth.src_mac_msk, spec->eth.src_mac_msk,
 851                        ETH_ALEN);
 852                 if (spec->eth.ether_type_enable) {
 853                         rule_hw->eth.ether_type_enable = 1;
 854                         rule_hw->eth.ether_type = spec->eth.ether_type;
 855                 }
 856                 rule_hw->eth.vlan_tag = spec->eth.vlan_id;
 857                 rule_hw->eth.vlan_tag_msk = spec->eth.vlan_id_msk;
 858                 break;
 859
 860         case MLX4_NET_TRANS_RULE_ID_IB:
 861                 rule_hw->ib.l3_qpn = spec->ib.l3_qpn;
 862                 rule_hw->ib.qpn_mask = spec->ib.qpn_msk;
 863                 memcpy(&rule_hw->ib.dst_gid, &spec->ib.dst_gid, 16);
 864                 memcpy(&rule_hw->ib.dst_gid_msk, &spec->ib.dst_gid_msk, 16);
 865                 break;
 866
 867         case MLX4_NET_TRANS_RULE_ID_IPV6:
 868                 return -EOPNOTSUPP;
 869
 870         case MLX4_NET_TRANS_RULE_ID_IPV4:
 871                 rule_hw->ipv4.src_ip = spec->ipv4.src_ip;
 872                 rule_hw->ipv4.src_ip_msk = spec->ipv4.src_ip_msk;
 873                 rule_hw->ipv4.dst_ip = spec->ipv4.dst_ip;
 874                 rule_hw->ipv4.dst_ip_msk = spec->ipv4.dst_ip_msk;
 875                 break;
 876
 877         case MLX4_NET_TRANS_RULE_ID_TCP:
 878         case MLX4_NET_TRANS_RULE_ID_UDP:
 879                 rule_hw->tcp_udp.dst_port = spec->tcp_udp.dst_port;
 880                 rule_hw->tcp_udp.dst_port_msk = spec->tcp_udp.dst_port_msk;
 881                 rule_hw->tcp_udp.src_port = spec->tcp_udp.src_port;
 882                 rule_hw->tcp_udp.src_port_msk = spec->tcp_udp.src_port_msk;
 883                 break;
 884
 885         case MLX4_NET_TRANS_RULE_ID_VXLAN:
 886                 rule_hw->vxlan.vni =
 887                         cpu_to_be32(be32_to_cpu(spec->vxlan.vni) << 8);
 888                 rule_hw->vxlan.vni_mask =
 889                         cpu_to_be32(be32_to_cpu(spec->vxlan.vni_mask) << 8);
 890                 break;
 891
 892         default:
 893                 return -EINVAL;
 894         }
 895
 896         return __rule_hw_sz[spec->id];
 897 }
 898
 899 static void mlx4_err_rule(struct mlx4_dev *dev, char *str,
 900                           struct mlx4_net_trans_rule *rule)
 901 {
 902 #define BUF_SIZE 256
 903         struct mlx4_spec_list *cur;
 904         char buf[BUF_SIZE];
 905         int len = 0;
 906
 907         mlx4_err(dev, "%s", str);
 908         len += snprintf(buf + len, BUF_SIZE - len,
 909                         "port = %d prio = 0x%x qp = 0x%x ",
 910                         rule->port, rule->priority, rule->qpn);
 911
 912         list_for_each_entry(cur, &rule->list, list) {
 913                 switch (cur->id) {
 914                 case MLX4_NET_TRANS_RULE_ID_ETH:
 915                         len += snprintf(buf + len, BUF_SIZE - len,
 916                                         "dmac = %pM ", &cur->eth.dst_mac);
 917                         if (cur->eth.ether_type)
 918                                 len += snprintf(buf + len, BUF_SIZE - len,
 919                                                 "ethertype = 0x%x ",
 920                                                 be16_to_cpu(cur->eth.ether_type));
 921                         if (cur->eth.vlan_id)
 922                                 len += snprintf(buf + len, BUF_SIZE - len,
 923                                                 "vlan-id = %d ",
 924                                                 be16_to_cpu(cur->eth.vlan_id));
 925                         break;
 926
 927                 case MLX4_NET_TRANS_RULE_ID_IPV4:
 928                         if (cur->ipv4.src_ip)
 929                                 len += snprintf(buf + len, BUF_SIZE - len,
 930                                                 "src-ip = %pI4 ",
 931                                                 &cur->ipv4.src_ip);
 932                         if (cur->ipv4.dst_ip)
 933                                 len += snprintf(buf + len, BUF_SIZE - len,
 934                                                 "dst-ip = %pI4 ",
 935                                                 &cur->ipv4.dst_ip);
 936                         break;
 937
 938                 case MLX4_NET_TRANS_RULE_ID_TCP:
 939                 case MLX4_NET_TRANS_RULE_ID_UDP:
 940                         if (cur->tcp_udp.src_port)
 941                                 len += snprintf(buf + len, BUF_SIZE - len,
 942                                                 "src-port = %d ",
 943                                                 be16_to_cpu(cur->tcp_udp.src_port));
 944                         if (cur->tcp_udp.dst_port)
 945                                 len += snprintf(buf + len, BUF_SIZE - len,
 946                                                 "dst-port = %d ",
 947                                                 be16_to_cpu(cur->tcp_udp.dst_port));
 948                         break;
 949
 950                 case MLX4_NET_TRANS_RULE_ID_IB:
 951                         len += snprintf(buf + len, BUF_SIZE - len,
 952                                         "dst-gid = %pI6\n", cur->ib.dst_gid);
 953                         len += snprintf(buf + len, BUF_SIZE - len,
 954                                         "dst-gid-mask = %pI6\n",
 955                                         cur->ib.dst_gid_msk);
 956                         break;
 957
 958                 case MLX4_NET_TRANS_RULE_ID_IPV6:
 959                         break;
 960
 961                 default:
 962                         break;
 963                 }
 964         }
 965         len += snprintf(buf + len, BUF_SIZE - len, "\n");
 966         mlx4_err(dev, "%s", buf);
 967
 968         if (len >= BUF_SIZE)
 969                 mlx4_err(dev, "Network rule error message was truncated, print buffer is too small\n");
 970 }
 971
 972 int mlx4_flow_attach(struct mlx4_dev *dev,
 973                      struct mlx4_net_trans_rule *rule, u64 *reg_id)
 974 {
 975         struct mlx4_cmd_mailbox *mailbox;
 976         struct mlx4_spec_list *cur;
 977         u32 size = 0;
 978         int ret;
 979
 980         mailbox = mlx4_alloc_cmd_mailbox(dev);
 981         if (IS_ERR(mailbox))
 982                 return PTR_ERR(mailbox);
 983
 984         trans_rule_ctrl_to_hw(rule, mailbox->buf);
 985
 986         size += sizeof(struct mlx4_net_trans_rule_hw_ctrl);
 987
 988         list_for_each_entry(cur, &rule->list, list) {
 989                 ret = parse_trans_rule(dev, cur, mailbox->buf + size);
 990                 if (ret < 0) {
 991                         mlx4_free_cmd_mailbox(dev, mailbox);
 992                         return ret;
 993                 }
 994                 size += ret;
 995         }
 996
 997         ret = mlx4_QP_FLOW_STEERING_ATTACH(dev, mailbox, size >> 2, reg_id);
 998         if (ret == -ENOMEM)
 999                 mlx4_err_rule(dev,
1000                               "mcg table is full. Fail to register network rule\n",
1001                               rule);
1002         else if (ret)
1003                 mlx4_err_rule(dev, "Fail to register network rule\n", rule);
1004
1005         mlx4_free_cmd_mailbox(dev, mailbox);
1006
1007         return ret;
1008 }
1009 EXPORT_SYMBOL_GPL(mlx4_flow_attach);
1010
1011 int mlx4_flow_detach(struct mlx4_dev *dev, u64 reg_id)
1012 {
1013         int err;
1014
1015         err = mlx4_QP_FLOW_STEERING_DETACH(dev, reg_id);
1016         if (err)
1017                 mlx4_err(dev, "Fail to detach network rule. registration id = 0x%llx\n",
1018                          reg_id);
1019         return err;
1020 }
1021 EXPORT_SYMBOL_GPL(mlx4_flow_detach);
1022
1023 int mlx4_tunnel_steer_add(struct mlx4_dev *dev, unsigned char *addr,
1024                           int port, int qpn, u16 prio, u64 *reg_id)
1025 {
1026         int err;
1027         struct mlx4_spec_list spec_eth_outer = { {NULL} };
1028         struct mlx4_spec_list spec_vxlan     = { {NULL} };
1029         struct mlx4_spec_list spec_eth_inner = { {NULL} };
1030
1031         struct mlx4_net_trans_rule rule = {
1032                 .queue_mode = MLX4_NET_TRANS_Q_FIFO,
1033                 .exclusive = 0,
1034                 .allow_loopback = 1,
1035                 .promisc_mode = MLX4_FS_REGULAR,
1036         };
1037
1038         __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
1039
1040         rule.port = port;
1041         rule.qpn = qpn;
1042         rule.priority = prio;
1043         INIT_LIST_HEAD(&rule.list);
1044
1045         spec_eth_outer.id = MLX4_NET_TRANS_RULE_ID_ETH;
1046         memcpy(spec_eth_outer.eth.dst_mac, addr, ETH_ALEN);
1047         memcpy(spec_eth_outer.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
1048
1049         spec_vxlan.id = MLX4_NET_TRANS_RULE_ID_VXLAN;    /* any vxlan header */
1050         spec_eth_inner.id = MLX4_NET_TRANS_RULE_ID_ETH;  /* any inner eth header */
1051
1052         list_add_tail(&spec_eth_outer.list, &rule.list);
1053         list_add_tail(&spec_vxlan.list,     &rule.list);
1054         list_add_tail(&spec_eth_inner.list, &rule.list);
1055
1056         err = mlx4_flow_attach(dev, &rule, reg_id);
1057         return err;
1058 }
1059 EXPORT_SYMBOL(mlx4_tunnel_steer_add);
1060
1061 int mlx4_FLOW_STEERING_IB_UC_QP_RANGE(struct mlx4_dev *dev, u32 min_range_qpn,
1062                                       u32 max_range_qpn)
1063 {
1064         int err;
1065         u64 in_param;
1066
1067         in_param = ((u64) min_range_qpn) << 32;
1068         in_param |= ((u64) max_range_qpn) & 0xFFFFFFFF;
1069
1070         err = mlx4_cmd(dev, in_param, 0, 0,
1071                         MLX4_FLOW_STEERING_IB_UC_QP_RANGE,
1072                         MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
1073
1074         return err;
1075 }
1076 EXPORT_SYMBOL_GPL(mlx4_FLOW_STEERING_IB_UC_QP_RANGE);
1077
1078 int mlx4_qp_attach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1079                           int block_mcast_loopback, enum mlx4_protocol prot,
1080                           enum mlx4_steer_type steer)
1081 {
1082         struct mlx4_priv *priv = mlx4_priv(dev);
1083         struct mlx4_cmd_mailbox *mailbox;
1084         struct mlx4_mgm *mgm;
1085         u32 members_count;
1086         int index, prev;
1087         int link = 0;
1088         int i;
1089         int err;
1090         u8 port = gid[5];
1091         u8 new_entry = 0;
1092
1093         mailbox = mlx4_alloc_cmd_mailbox(dev);
1094         if (IS_ERR(mailbox))
1095                 return PTR_ERR(mailbox);
1096         mgm = mailbox->buf;
1097
1098         mutex_lock(&priv->mcg_table.mutex);
1099         err = find_entry(dev, port, gid, prot,
1100                          mailbox, &prev, &index);
1101         if (err)
1102                 goto out;
1103
1104         if (index != -1) {
1105                 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
1106                         new_entry = 1;
1107                         memcpy(mgm->gid, gid, 16);
1108                 }
1109         } else {
1110                 link = 1;
1111
1112                 index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);
1113                 if (index == -1) {
1114                         mlx4_err(dev, "No AMGM entries left\n");
1115                         err = -ENOMEM;
1116                         goto out;
1117                 }
1118                 index += dev->caps.num_mgms;
1119
1120                 new_entry = 1;
1121                 memset(mgm, 0, sizeof *mgm);
1122                 memcpy(mgm->gid, gid, 16);
1123         }
1124
1125         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
1126         if (members_count == dev->caps.num_qp_per_mgm) {
1127                 mlx4_err(dev, "MGM at index %x is full\n", index);
1128                 err = -ENOMEM;
1129                 goto out;
1130         }
1131
1132         for (i = 0; i < members_count; ++i)
1133                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {
1134                         mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);
1135                         err = 0;
1136                         goto out;
1137                 }
1138
1139         if (block_mcast_loopback)
1140                 mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |
1141                                                        (1U << MGM_BLCK_LB_BIT));
1142         else
1143                 mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK);
1144
1145         mgm->members_count = cpu_to_be32(members_count | (u32) prot << 30);
1146
1147         err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1148         if (err)
1149                 goto out;
1150
1151         if (!link)
1152                 goto out;
1153
1154         err = mlx4_READ_ENTRY(dev, prev, mailbox);
1155         if (err)
1156                 goto out;
1157
1158         mgm->next_gid_index = cpu_to_be32(index << 6);
1159
1160         err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
1161         if (err)
1162                 goto out;
1163
1164 out:
1165         if (prot == MLX4_PROT_ETH) {
1166                 /* manage the steering entry for promisc mode */
1167                 if (new_entry)
1168                         new_steering_entry(dev, port, steer, index, qp->qpn);
1169                 else
1170                         existing_steering_entry(dev, port, steer,
1171                                                 index, qp->qpn);
1172         }
1173         if (err && link && index != -1) {
1174                 if (index < dev->caps.num_mgms)
1175                         mlx4_warn(dev, "Got AMGM index %d < %d\n",
1176                                   index, dev->caps.num_mgms);
1177                 else
1178                         mlx4_bitmap_free(&priv->mcg_table.bitmap,
1179                                          index - dev->caps.num_mgms, MLX4_USE_RR);
1180         }
1181         mutex_unlock(&priv->mcg_table.mutex);
1182
1183         mlx4_free_cmd_mailbox(dev, mailbox);
1184         return err;
1185 }
1186
1187 int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1188                           enum mlx4_protocol prot, enum mlx4_steer_type steer)
1189 {
1190         struct mlx4_priv *priv = mlx4_priv(dev);
1191         struct mlx4_cmd_mailbox *mailbox;
1192         struct mlx4_mgm *mgm;
1193         u32 members_count;
1194         int prev, index;
1195         int i, loc = -1;
1196         int err;
1197         u8 port = gid[5];
1198         bool removed_entry = false;
1199
1200         mailbox = mlx4_alloc_cmd_mailbox(dev);
1201         if (IS_ERR(mailbox))
1202                 return PTR_ERR(mailbox);
1203         mgm = mailbox->buf;
1204
1205         mutex_lock(&priv->mcg_table.mutex);
1206
1207         err = find_entry(dev, port, gid, prot,
1208                          mailbox, &prev, &index);
1209         if (err)
1210                 goto out;
1211
1212         if (index == -1) {
1213                 mlx4_err(dev, "MGID %pI6 not found\n", gid);
1214                 err = -EINVAL;
1215                 goto out;
1216         }
1217
1218         /* If this QP is also a promisc QP, it shouldn't be removed only if
1219          * at least one none promisc QP is also attached to this MCG
1220          */
1221         if (prot == MLX4_PROT_ETH &&
1222             check_duplicate_entry(dev, port, steer, index, qp->qpn) &&
1223             !promisc_steering_entry(dev, port, steer, index, qp->qpn, NULL))
1224                         goto out;
1225
1226         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
1227         for (i = 0; i < members_count; ++i)
1228                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {
1229                         loc = i;
1230                         break;
1231                 }
1232
1233         if (loc == -1) {
1234                 mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);
1235                 err = -EINVAL;
1236                 goto out;
1237         }
1238
1239         /* copy the last QP in this MGM over removed QP */
1240         mgm->qp[loc] = mgm->qp[members_count - 1];
1241         mgm->qp[members_count - 1] = 0;
1242         mgm->members_count = cpu_to_be32(--members_count | (u32) prot << 30);
1243
1244         if (prot == MLX4_PROT_ETH)
1245                 removed_entry = can_remove_steering_entry(dev, port, steer,
1246                                                                 index, qp->qpn);
1247         if (members_count && (prot != MLX4_PROT_ETH || !removed_entry)) {
1248                 err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1249                 goto out;
1250         }
1251
1252         /* We are going to delete the entry, members count should be 0 */
1253         mgm->members_count = cpu_to_be32((u32) prot << 30);
1254
1255         if (prev == -1) {
1256                 /* Remove entry from MGM */
1257                 int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;
1258                 if (amgm_index) {
1259                         err = mlx4_READ_ENTRY(dev, amgm_index, mailbox);
1260                         if (err)
1261                                 goto out;
1262                 } else
1263                         memset(mgm->gid, 0, 16);
1264
1265                 err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1266                 if (err)
1267                         goto out;
1268
1269                 if (amgm_index) {
1270                         if (amgm_index < dev->caps.num_mgms)
1271                                 mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d\n",
1272                                           index, amgm_index, dev->caps.num_mgms);
1273                         else
1274                                 mlx4_bitmap_free(&priv->mcg_table.bitmap,
1275                                                  amgm_index - dev->caps.num_mgms, MLX4_USE_RR);
1276                 }
1277         } else {
1278                 /* Remove entry from AMGM */
1279                 int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;
1280                 err = mlx4_READ_ENTRY(dev, prev, mailbox);
1281                 if (err)
1282                         goto out;
1283
1284                 mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);
1285
1286                 err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
1287                 if (err)
1288                         goto out;
1289
1290                 if (index < dev->caps.num_mgms)
1291                         mlx4_warn(dev, "entry %d had next AMGM index %d < %d\n",
1292                                   prev, index, dev->caps.num_mgms);
1293                 else
1294                         mlx4_bitmap_free(&priv->mcg_table.bitmap,
1295                                          index - dev->caps.num_mgms, MLX4_USE_RR);
1296         }
1297
1298 out:
1299         mutex_unlock(&priv->mcg_table.mutex);
1300
1301         mlx4_free_cmd_mailbox(dev, mailbox);
1302         return err;
1303 }
1304
1305 static int mlx4_QP_ATTACH(struct mlx4_dev *dev, struct mlx4_qp *qp,
1306                           u8 gid[16], u8 attach, u8 block_loopback,
1307                           enum mlx4_protocol prot)
1308 {
1309         struct mlx4_cmd_mailbox *mailbox;
1310         int err = 0;
1311         int qpn;
1312
1313         if (!mlx4_is_mfunc(dev))
1314                 return -EBADF;
1315
1316         mailbox = mlx4_alloc_cmd_mailbox(dev);
1317         if (IS_ERR(mailbox))
1318                 return PTR_ERR(mailbox);
1319
1320         memcpy(mailbox->buf, gid, 16);
1321         qpn = qp->qpn;
1322         qpn |= (prot << 28);
1323         if (attach && block_loopback)
1324                 qpn |= (1 << 31);
1325
1326         err = mlx4_cmd(dev, mailbox->dma, qpn, attach,
1327                        MLX4_CMD_QP_ATTACH, MLX4_CMD_TIME_CLASS_A,
1328                        MLX4_CMD_WRAPPED);
1329
1330         mlx4_free_cmd_mailbox(dev, mailbox);
1331         return err;
1332 }
1333
1334 int mlx4_trans_to_dmfs_attach(struct mlx4_dev *dev, struct mlx4_qp *qp,
1335                               u8 gid[16], u8 port,
1336                               int block_mcast_loopback,
1337                               enum mlx4_protocol prot, u64 *reg_id)
1338 {
1339                 struct mlx4_spec_list spec = { {NULL} };
1340                 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
1341
1342                 struct mlx4_net_trans_rule rule = {
1343                         .queue_mode = MLX4_NET_TRANS_Q_FIFO,
1344                         .exclusive = 0,
1345                         .promisc_mode = MLX4_FS_REGULAR,
1346                         .priority = MLX4_DOMAIN_NIC,
1347                 };
1348
1349                 rule.allow_loopback = !block_mcast_loopback;
1350                 rule.port = port;
1351                 rule.qpn = qp->qpn;
1352                 INIT_LIST_HEAD(&rule.list);
1353
1354                 switch (prot) {
1355                 case MLX4_PROT_ETH:
1356                         spec.id = MLX4_NET_TRANS_RULE_ID_ETH;
1357                         memcpy(spec.eth.dst_mac, &gid[10], ETH_ALEN);
1358                         memcpy(spec.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
1359                         break;
1360
1361                 case MLX4_PROT_IB_IPV6:
1362                         spec.id = MLX4_NET_TRANS_RULE_ID_IB;
1363                         memcpy(spec.ib.dst_gid, gid, 16);
1364                         memset(&spec.ib.dst_gid_msk, 0xff, 16);
1365                         break;
1366                 default:
1367                         return -EINVAL;
1368                 }
1369                 list_add_tail(&spec.list, &rule.list);
1370
1371                 return mlx4_flow_attach(dev, &rule, reg_id);
1372 }
1373
1374 int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1375                           u8 port, int block_mcast_loopback,
1376                           enum mlx4_protocol prot, u64 *reg_id)
1377 {
1378         switch (dev->caps.steering_mode) {
1379         case MLX4_STEERING_MODE_A0:
1380                 if (prot == MLX4_PROT_ETH)
1381                         return 0;
1382
1383         case MLX4_STEERING_MODE_B0:
1384                 if (prot == MLX4_PROT_ETH)
1385                         gid[7] |= (MLX4_MC_STEER << 1);
1386
1387                 if (mlx4_is_mfunc(dev))
1388                         return mlx4_QP_ATTACH(dev, qp, gid, 1,
1389                                               block_mcast_loopback, prot);
1390                 return mlx4_qp_attach_common(dev, qp, gid,
1391                                              block_mcast_loopback, prot,
1392                                              MLX4_MC_STEER);
1393
1394         case MLX4_STEERING_MODE_DEVICE_MANAGED:
1395                 return mlx4_trans_to_dmfs_attach(dev, qp, gid, port,
1396                                                  block_mcast_loopback,
1397                                                  prot, reg_id);
1398         default:
1399                 return -EINVAL;
1400         }
1401 }
1402 EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
1403
1404 int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1405                           enum mlx4_protocol prot, u64 reg_id)
1406 {
1407         switch (dev->caps.steering_mode) {
1408         case MLX4_STEERING_MODE_A0:
1409                 if (prot == MLX4_PROT_ETH)
1410                         return 0;
1411
1412         case MLX4_STEERING_MODE_B0:
1413                 if (prot == MLX4_PROT_ETH)
1414                         gid[7] |= (MLX4_MC_STEER << 1);
1415
1416                 if (mlx4_is_mfunc(dev))
1417                         return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);
1418
1419                 return mlx4_qp_detach_common(dev, qp, gid, prot,
1420                                              MLX4_MC_STEER);
1421
1422         case MLX4_STEERING_MODE_DEVICE_MANAGED:
1423                 return mlx4_flow_detach(dev, reg_id);
1424
1425         default:
1426                 return -EINVAL;
1427         }
1428 }
1429 EXPORT_SYMBOL_GPL(mlx4_multicast_detach);
1430
1431 int mlx4_flow_steer_promisc_add(struct mlx4_dev *dev, u8 port,
1432                                 u32 qpn, enum mlx4_net_trans_promisc_mode mode)
1433 {
1434         struct mlx4_net_trans_rule rule;
1435         u64 *regid_p;
1436
1437         switch (mode) {
1438         case MLX4_FS_ALL_DEFAULT:
1439                 regid_p = &dev->regid_promisc_array[port];
1440                 break;
1441         case MLX4_FS_MC_DEFAULT:
1442                 regid_p = &dev->regid_allmulti_array[port];
1443                 break;
1444         default:
1445                 return -1;
1446         }
1447
1448         if (*regid_p != 0)
1449                 return -1;
1450
1451         rule.promisc_mode = mode;
1452         rule.port = port;
1453         rule.qpn = qpn;
1454         INIT_LIST_HEAD(&rule.list);
1455         mlx4_err(dev, "going promisc on %x\n", port);
1456
1457         return  mlx4_flow_attach(dev, &rule, regid_p);
1458 }
1459 EXPORT_SYMBOL_GPL(mlx4_flow_steer_promisc_add);
1460
1461 int mlx4_flow_steer_promisc_remove(struct mlx4_dev *dev, u8 port,
1462                                    enum mlx4_net_trans_promisc_mode mode)
1463 {
1464         int ret;
1465         u64 *regid_p;
1466
1467         switch (mode) {
1468         case MLX4_FS_ALL_DEFAULT:
1469                 regid_p = &dev->regid_promisc_array[port];
1470                 break;
1471         case MLX4_FS_MC_DEFAULT:
1472                 regid_p = &dev->regid_allmulti_array[port];
1473                 break;
1474         default:
1475                 return -1;
1476         }
1477
1478         if (*regid_p == 0)
1479                 return -1;
1480
1481         ret =  mlx4_flow_detach(dev, *regid_p);
1482         if (ret == 0)
1483                 *regid_p = 0;
1484
1485         return ret;
1486 }
1487 EXPORT_SYMBOL_GPL(mlx4_flow_steer_promisc_remove);
1488
1489 int mlx4_unicast_attach(struct mlx4_dev *dev,
1490                         struct mlx4_qp *qp, u8 gid[16],
1491                         int block_mcast_loopback, enum mlx4_protocol prot)
1492 {
1493         if (prot == MLX4_PROT_ETH)
1494                 gid[7] |= (MLX4_UC_STEER << 1);
1495
1496         if (mlx4_is_mfunc(dev))
1497                 return mlx4_QP_ATTACH(dev, qp, gid, 1,
1498                                         block_mcast_loopback, prot);
1499
1500         return mlx4_qp_attach_common(dev, qp, gid, block_mcast_loopback,
1501                                         prot, MLX4_UC_STEER);
1502 }
1503 EXPORT_SYMBOL_GPL(mlx4_unicast_attach);
1504
1505 int mlx4_unicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp,
1506                                u8 gid[16], enum mlx4_protocol prot)
1507 {
1508         if (prot == MLX4_PROT_ETH)
1509                 gid[7] |= (MLX4_UC_STEER << 1);
1510
1511         if (mlx4_is_mfunc(dev))
1512                 return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);
1513
1514         return mlx4_qp_detach_common(dev, qp, gid, prot, MLX4_UC_STEER);
1515 }
1516 EXPORT_SYMBOL_GPL(mlx4_unicast_detach);
1517
1518 int mlx4_PROMISC_wrapper(struct mlx4_dev *dev, int slave,
1519                          struct mlx4_vhcr *vhcr,
1520                          struct mlx4_cmd_mailbox *inbox,
1521                          struct mlx4_cmd_mailbox *outbox,
1522                          struct mlx4_cmd_info *cmd)
1523 {
1524         u32 qpn = (u32) vhcr->in_param & 0xffffffff;
1525         int port = mlx4_slave_convert_port(dev, slave, vhcr->in_param >> 62);
1526         enum mlx4_steer_type steer = vhcr->in_modifier;
1527
1528         if (port < 0)
1529                 return -EINVAL;
1530
1531         /* Promiscuous unicast is not allowed in mfunc */
1532         if (mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)
1533                 return 0;
1534
1535         if (vhcr->op_modifier)
1536                 return add_promisc_qp(dev, port, steer, qpn);
1537         else
1538                 return remove_promisc_qp(dev, port, steer, qpn);
1539 }
1540
1541 static int mlx4_PROMISC(struct mlx4_dev *dev, u32 qpn,
1542                         enum mlx4_steer_type steer, u8 add, u8 port)
1543 {
1544         return mlx4_cmd(dev, (u64) qpn | (u64) port << 62, (u32) steer, add,
1545                         MLX4_CMD_PROMISC, MLX4_CMD_TIME_CLASS_A,
1546                         MLX4_CMD_WRAPPED);
1547 }
1548
1549 int mlx4_multicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
1550 {
1551         if (mlx4_is_mfunc(dev))
1552                 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 1, port);
1553
1554         return add_promisc_qp(dev, port, MLX4_MC_STEER, qpn);
1555 }
1556 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_add);
1557
1558 int mlx4_multicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
1559 {
1560         if (mlx4_is_mfunc(dev))
1561                 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 0, port);
1562
1563         return remove_promisc_qp(dev, port, MLX4_MC_STEER, qpn);
1564 }
1565 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_remove);
1566
1567 int mlx4_unicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
1568 {
1569         if (mlx4_is_mfunc(dev))
1570                 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 1, port);
1571
1572         return add_promisc_qp(dev, port, MLX4_UC_STEER, qpn);
1573 }
1574 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_add);
1575
1576 int mlx4_unicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
1577 {
1578         if (mlx4_is_mfunc(dev))
1579                 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 0, port);
1580
1581         return remove_promisc_qp(dev, port, MLX4_UC_STEER, qpn);
1582 }
1583 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_remove);
1584
1585 int mlx4_init_mcg_table(struct mlx4_dev *dev)
1586 {
1587         struct mlx4_priv *priv = mlx4_priv(dev);
1588         int err;
1589
1590         /* No need for mcg_table when fw managed the mcg table*/
1591         if (dev->caps.steering_mode ==
1592             MLX4_STEERING_MODE_DEVICE_MANAGED)
1593                 return 0;
1594         err = mlx4_bitmap_init(&priv->mcg_table.bitmap, dev->caps.num_amgms,
1595                                dev->caps.num_amgms - 1, 0, 0);
1596         if (err)
1597                 return err;
1598
1599         mutex_init(&priv->mcg_table.mutex);
1600
1601         return 0;
1602 }
1603
1604 void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)
1605 {
1606         if (dev->caps.steering_mode !=
1607             MLX4_STEERING_MODE_DEVICE_MANAGED)
1608                 mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);
1609 }