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 == pqp->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 /* I a steering entry contains only promisc QPs, it can be removed. */
 328 static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
 329                                       enum mlx4_steer_type steer,
 330                                       unsigned int index, u32 tqpn)
 331 {
 332         struct mlx4_steer *s_steer;
 333         struct mlx4_cmd_mailbox *mailbox;
 334         struct mlx4_mgm *mgm;
 335         struct mlx4_steer_index *entry = NULL, *tmp_entry;
 336         u32 qpn;
 337         u32 members_count;
 338         bool ret = false;
 339         int i;
 340
 341         if (port < 1 || port > dev->caps.num_ports)
 342                 return NULL;
 343
 344         s_steer = &mlx4_priv(dev)->steer[port - 1];
 345
 346         mailbox = mlx4_alloc_cmd_mailbox(dev);
 347         if (IS_ERR(mailbox))
 348                 return false;
 349         mgm = mailbox->buf;
 350
 351         if (mlx4_READ_ENTRY(dev, index, mailbox))
 352                 goto out;
 353         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 354         for (i = 0;  i < members_count; i++) {
 355                 qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK;
 356                 if (!get_promisc_qp(dev, port, steer, qpn) && qpn != tqpn) {
 357                         /* the qp is not promisc, the entry can't be removed */
 358                         goto out;
 359                 }
 360         }
 361          /* All the qps currently registered for this entry are promiscuous,
 362           * Checking for duplicates */
 363         ret = true;
 364         list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) {
 365                 if (entry->index == index) {
 366                         if (list_empty(&entry->duplicates)) {
 367                                 list_del(&entry->list);
 368                                 kfree(entry);
 369                         } else {
 370                                 /* This entry contains duplicates so it shouldn't be removed */
 371                                 ret = false;
 372                                 goto out;
 373                         }
 374                 }
 375         }
 376
 377 out:
 378         mlx4_free_cmd_mailbox(dev, mailbox);
 379         return ret;
 380 }
 381
 382 static int add_promisc_qp(struct mlx4_dev *dev, u8 port,
 383                           enum mlx4_steer_type steer, u32 qpn)
 384 {
 385         struct mlx4_steer *s_steer;
 386         struct mlx4_cmd_mailbox *mailbox;
 387         struct mlx4_mgm *mgm;
 388         struct mlx4_steer_index *entry;
 389         struct mlx4_promisc_qp *pqp;
 390         struct mlx4_promisc_qp *dqp;
 391         u32 members_count;
 392         u32 prot;
 393         int i;
 394         bool found;
 395         int err;
 396         struct mlx4_priv *priv = mlx4_priv(dev);
 397
 398         if (port < 1 || port > dev->caps.num_ports)
 399                 return -EINVAL;
 400
 401         s_steer = &mlx4_priv(dev)->steer[port - 1];
 402
 403         mutex_lock(&priv->mcg_table.mutex);
 404
 405         if (get_promisc_qp(dev, port, steer, qpn)) {
 406                 err = 0;  /* Noting to do, already exists */
 407                 goto out_mutex;
 408         }
 409
 410         pqp = kmalloc(sizeof *pqp, GFP_KERNEL);
 411         if (!pqp) {
 412                 err = -ENOMEM;
 413                 goto out_mutex;
 414         }
 415         pqp->qpn = qpn;
 416
 417         mailbox = mlx4_alloc_cmd_mailbox(dev);
 418         if (IS_ERR(mailbox)) {
 419                 err = -ENOMEM;
 420                 goto out_alloc;
 421         }
 422         mgm = mailbox->buf;
 423
 424         /* the promisc qp needs to be added for each one of the steering
 425          * entries, if it already exists, needs to be added as a duplicate
 426          * for this entry */
 427         list_for_each_entry(entry, &s_steer->steer_entries[steer], list) {
 428                 err = mlx4_READ_ENTRY(dev, entry->index, mailbox);
 429                 if (err)
 430                         goto out_mailbox;
 431
 432                 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 433                 prot = be32_to_cpu(mgm->members_count) >> 30;
 434                 found = false;
 435                 for (i = 0; i < members_count; i++) {
 436                         if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn) {
 437                                 /* Entry already exists, add to duplicates */
 438                                 dqp = kmalloc(sizeof *dqp, GFP_KERNEL);
 439                                 if (!dqp) {
 440                                         err = -ENOMEM;
 441                                         goto out_mailbox;
 442                                 }
 443                                 dqp->qpn = qpn;
 444                                 list_add_tail(&dqp->list, &entry->duplicates);
 445                                 found = true;
 446                         }
 447                 }
 448                 if (!found) {
 449                         /* Need to add the qpn to mgm */
 450                         if (members_count == dev->caps.num_qp_per_mgm) {
 451                                 /* entry is full */
 452                                 err = -ENOMEM;
 453                                 goto out_mailbox;
 454                         }
 455                         mgm->qp[members_count++] = cpu_to_be32(qpn & MGM_QPN_MASK);
 456                         mgm->members_count = cpu_to_be32(members_count | (prot << 30));
 457                         err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox);
 458                         if (err)
 459                                 goto out_mailbox;
 460                 }
 461         }
 462
 463         /* add the new qpn to list of promisc qps */
 464         list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
 465         /* now need to add all the promisc qps to default entry */
 466         memset(mgm, 0, sizeof *mgm);
 467         members_count = 0;
 468         list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)
 469                 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
 470         mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
 471
 472         err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);
 473         if (err)
 474                 goto out_list;
 475
 476         mlx4_free_cmd_mailbox(dev, mailbox);
 477         mutex_unlock(&priv->mcg_table.mutex);
 478         return 0;
 479
 480 out_list:
 481         list_del(&pqp->list);
 482 out_mailbox:
 483         mlx4_free_cmd_mailbox(dev, mailbox);
 484 out_alloc:
 485         kfree(pqp);
 486 out_mutex:
 487         mutex_unlock(&priv->mcg_table.mutex);
 488         return err;
 489 }
 490
 491 static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
 492                              enum mlx4_steer_type steer, u32 qpn)
 493 {
 494         struct mlx4_priv *priv = mlx4_priv(dev);
 495         struct mlx4_steer *s_steer;
 496         struct mlx4_cmd_mailbox *mailbox;
 497         struct mlx4_mgm *mgm;
 498         struct mlx4_steer_index *entry;
 499         struct mlx4_promisc_qp *pqp;
 500         struct mlx4_promisc_qp *dqp;
 501         u32 members_count;
 502         bool found;
 503         bool back_to_list = false;
 504         int loc, i;
 505         int err;
 506
 507         if (port < 1 || port > dev->caps.num_ports)
 508                 return -EINVAL;
 509
 510         s_steer = &mlx4_priv(dev)->steer[port - 1];
 511         mutex_lock(&priv->mcg_table.mutex);
 512
 513         pqp = get_promisc_qp(dev, port, steer, qpn);
 514         if (unlikely(!pqp)) {
 515                 mlx4_warn(dev, "QP %x is not promiscuous QP\n", qpn);
 516                 /* nothing to do */
 517                 err = 0;
 518                 goto out_mutex;
 519         }
 520
 521         /*remove from list of promisc qps */
 522         list_del(&pqp->list);
 523
 524         /* set the default entry not to include the removed one */
 525         mailbox = mlx4_alloc_cmd_mailbox(dev);
 526         if (IS_ERR(mailbox)) {
 527                 err = -ENOMEM;
 528                 back_to_list = true;
 529                 goto out_list;
 530         }
 531         mgm = mailbox->buf;
 532         members_count = 0;
 533         list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)
 534                 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
 535         mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
 536
 537         err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);
 538         if (err)
 539                 goto out_mailbox;
 540
 541         /* remove the qp from all the steering entries*/
 542         list_for_each_entry(entry, &s_steer->steer_entries[steer], list) {
 543                 found = false;
 544                 list_for_each_entry(dqp, &entry->duplicates, list) {
 545                         if (dqp->qpn == qpn) {
 546                                 found = true;
 547                                 break;
 548                         }
 549                 }
 550                 if (found) {
 551                         /* a duplicate, no need to change the mgm,
 552                          * only update the duplicates list */
 553                         list_del(&dqp->list);
 554                         kfree(dqp);
 555                 } else {
 556                         err = mlx4_READ_ENTRY(dev, entry->index, mailbox);
 557                                 if (err)
 558                                         goto out_mailbox;
 559                         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 560                         for (loc = -1, i = 0; i < members_count; ++i)
 561                                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn)
 562                                         loc = i;
 563
 564                         mgm->members_count = cpu_to_be32(--members_count |
 565                                                          (MLX4_PROT_ETH << 30));
 566                         mgm->qp[loc] = mgm->qp[i - 1];
 567                         mgm->qp[i - 1] = 0;
 568
 569                         err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox);
 570                                 if (err)
 571                                         goto out_mailbox;
 572                 }
 573
 574         }
 575
 576 out_mailbox:
 577         mlx4_free_cmd_mailbox(dev, mailbox);
 578 out_list:
 579         if (back_to_list)
 580                 list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
 581         else
 582                 kfree(pqp);
 583 out_mutex:
 584         mutex_unlock(&priv->mcg_table.mutex);
 585         return err;
 586 }
 587
 588 /*
 589  * Caller must hold MCG table semaphore.  gid and mgm parameters must
 590  * be properly aligned for command interface.
 591  *
 592  *  Returns 0 unless a firmware command error occurs.
 593  *
 594  * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
 595  * and *mgm holds MGM entry.
 596  *
 597  * if GID is found in AMGM, *index = index in AMGM, *prev = index of
 598  * previous entry in hash chain and *mgm holds AMGM entry.
 599  *
 600  * If no AMGM exists for given gid, *index = -1, *prev = index of last
 601  * entry in hash chain and *mgm holds end of hash chain.
 602  */
 603 static int find_entry(struct mlx4_dev *dev, u8 port,
 604                       u8 *gid, enum mlx4_protocol prot,
 605                       struct mlx4_cmd_mailbox *mgm_mailbox,
 606                       int *prev, int *index)
 607 {
 608         struct mlx4_cmd_mailbox *mailbox;
 609         struct mlx4_mgm *mgm = mgm_mailbox->buf;
 610         u8 *mgid;
 611         int err;
 612         u16 hash;
 613         u8 op_mod = (prot == MLX4_PROT_ETH) ?
 614                 !!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) : 0;
 615
 616         mailbox = mlx4_alloc_cmd_mailbox(dev);
 617         if (IS_ERR(mailbox))
 618                 return -ENOMEM;
 619         mgid = mailbox->buf;
 620
 621         memcpy(mgid, gid, 16);
 622
 623         err = mlx4_GID_HASH(dev, mailbox, &hash, op_mod);
 624         mlx4_free_cmd_mailbox(dev, mailbox);
 625         if (err)
 626                 return err;
 627
 628         if (0)
 629                 mlx4_dbg(dev, "Hash for %pI6 is %04x\n", gid, hash);
 630
 631         *index = hash;
 632         *prev  = -1;
 633
 634         do {
 635                 err = mlx4_READ_ENTRY(dev, *index, mgm_mailbox);
 636                 if (err)
 637                         return err;
 638
 639                 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
 640                         if (*index != hash) {
 641                                 mlx4_err(dev, "Found zero MGID in AMGM.\n");
 642                                 err = -EINVAL;
 643                         }
 644                         return err;
 645                 }
 646
 647                 if (!memcmp(mgm->gid, gid, 16) &&
 648                     be32_to_cpu(mgm->members_count) >> 30 == prot)
 649                         return err;
 650
 651                 *prev = *index;
 652                 *index = be32_to_cpu(mgm->next_gid_index) >> 6;
 653         } while (*index);
 654
 655         *index = -1;
 656         return err;
 657 }
 658
 659 static const u8 __promisc_mode[] = {
 660         [MLX4_FS_REGULAR]   = 0x0,
 661         [MLX4_FS_ALL_DEFAULT] = 0x1,
 662         [MLX4_FS_MC_DEFAULT] = 0x3,
 663         [MLX4_FS_UC_SNIFFER] = 0x4,
 664         [MLX4_FS_MC_SNIFFER] = 0x5,
 665 };
 666
 667 int mlx4_map_sw_to_hw_steering_mode(struct mlx4_dev *dev,
 668                                     enum mlx4_net_trans_promisc_mode flow_type)
 669 {
 670         if (flow_type >= MLX4_FS_MODE_NUM) {
 671                 mlx4_err(dev, "Invalid flow type. type = %d\n", flow_type);
 672                 return -EINVAL;
 673         }
 674         return __promisc_mode[flow_type];
 675 }
 676 EXPORT_SYMBOL_GPL(mlx4_map_sw_to_hw_steering_mode);
 677
 678 static void trans_rule_ctrl_to_hw(struct mlx4_net_trans_rule *ctrl,
 679                                   struct mlx4_net_trans_rule_hw_ctrl *hw)
 680 {
 681         u8 flags = 0;
 682
 683         flags = ctrl->queue_mode == MLX4_NET_TRANS_Q_LIFO ? 1 : 0;
 684         flags |= ctrl->exclusive ? (1 << 2) : 0;
 685         flags |= ctrl->allow_loopback ? (1 << 3) : 0;
 686
 687         hw->flags = flags;
 688         hw->type = __promisc_mode[ctrl->promisc_mode];
 689         hw->prio = cpu_to_be16(ctrl->priority);
 690         hw->port = ctrl->port;
 691         hw->qpn = cpu_to_be32(ctrl->qpn);
 692 }
 693
 694 const u16 __sw_id_hw[] = {
 695         [MLX4_NET_TRANS_RULE_ID_ETH]     = 0xE001,
 696         [MLX4_NET_TRANS_RULE_ID_IB]      = 0xE005,
 697         [MLX4_NET_TRANS_RULE_ID_IPV6]    = 0xE003,
 698         [MLX4_NET_TRANS_RULE_ID_IPV4]    = 0xE002,
 699         [MLX4_NET_TRANS_RULE_ID_TCP]     = 0xE004,
 700         [MLX4_NET_TRANS_RULE_ID_UDP]     = 0xE006,
 701         [MLX4_NET_TRANS_RULE_ID_VXLAN]   = 0xE008
 702 };
 703
 704 int mlx4_map_sw_to_hw_steering_id(struct mlx4_dev *dev,
 705                                   enum mlx4_net_trans_rule_id id)
 706 {
 707         if (id >= MLX4_NET_TRANS_RULE_NUM) {
 708                 mlx4_err(dev, "Invalid network rule id. id = %d\n", id);
 709                 return -EINVAL;
 710         }
 711         return __sw_id_hw[id];
 712 }
 713 EXPORT_SYMBOL_GPL(mlx4_map_sw_to_hw_steering_id);
 714
 715 static const int __rule_hw_sz[] = {
 716         [MLX4_NET_TRANS_RULE_ID_ETH] =
 717                 sizeof(struct mlx4_net_trans_rule_hw_eth),
 718         [MLX4_NET_TRANS_RULE_ID_IB] =
 719                 sizeof(struct mlx4_net_trans_rule_hw_ib),
 720         [MLX4_NET_TRANS_RULE_ID_IPV6] = 0,
 721         [MLX4_NET_TRANS_RULE_ID_IPV4] =
 722                 sizeof(struct mlx4_net_trans_rule_hw_ipv4),
 723         [MLX4_NET_TRANS_RULE_ID_TCP] =
 724                 sizeof(struct mlx4_net_trans_rule_hw_tcp_udp),
 725         [MLX4_NET_TRANS_RULE_ID_UDP] =
 726                 sizeof(struct mlx4_net_trans_rule_hw_tcp_udp),
 727         [MLX4_NET_TRANS_RULE_ID_VXLAN] =
 728                 sizeof(struct mlx4_net_trans_rule_hw_vxlan)
 729 };
 730
 731 int mlx4_hw_rule_sz(struct mlx4_dev *dev,
 732                enum mlx4_net_trans_rule_id id)
 733 {
 734         if (id >= MLX4_NET_TRANS_RULE_NUM) {
 735                 mlx4_err(dev, "Invalid network rule id. id = %d\n", id);
 736                 return -EINVAL;
 737         }
 738
 739         return __rule_hw_sz[id];
 740 }
 741 EXPORT_SYMBOL_GPL(mlx4_hw_rule_sz);
 742
 743 static int parse_trans_rule(struct mlx4_dev *dev, struct mlx4_spec_list *spec,
 744                             struct _rule_hw *rule_hw)
 745 {
 746         if (mlx4_hw_rule_sz(dev, spec->id) < 0)
 747                 return -EINVAL;
 748         memset(rule_hw, 0, mlx4_hw_rule_sz(dev, spec->id));
 749         rule_hw->id = cpu_to_be16(__sw_id_hw[spec->id]);
 750         rule_hw->size = mlx4_hw_rule_sz(dev, spec->id) >> 2;
 751
 752         switch (spec->id) {
 753         case MLX4_NET_TRANS_RULE_ID_ETH:
 754                 memcpy(rule_hw->eth.dst_mac, spec->eth.dst_mac, ETH_ALEN);
 755                 memcpy(rule_hw->eth.dst_mac_msk, spec->eth.dst_mac_msk,
 756                        ETH_ALEN);
 757                 memcpy(rule_hw->eth.src_mac, spec->eth.src_mac, ETH_ALEN);
 758                 memcpy(rule_hw->eth.src_mac_msk, spec->eth.src_mac_msk,
 759                        ETH_ALEN);
 760                 if (spec->eth.ether_type_enable) {
 761                         rule_hw->eth.ether_type_enable = 1;
 762                         rule_hw->eth.ether_type = spec->eth.ether_type;
 763                 }
 764                 rule_hw->eth.vlan_tag = spec->eth.vlan_id;
 765                 rule_hw->eth.vlan_tag_msk = spec->eth.vlan_id_msk;
 766                 break;
 767
 768         case MLX4_NET_TRANS_RULE_ID_IB:
 769                 rule_hw->ib.l3_qpn = spec->ib.l3_qpn;
 770                 rule_hw->ib.qpn_mask = spec->ib.qpn_msk;
 771                 memcpy(&rule_hw->ib.dst_gid, &spec->ib.dst_gid, 16);
 772                 memcpy(&rule_hw->ib.dst_gid_msk, &spec->ib.dst_gid_msk, 16);
 773                 break;
 774
 775         case MLX4_NET_TRANS_RULE_ID_IPV6:
 776                 return -EOPNOTSUPP;
 777
 778         case MLX4_NET_TRANS_RULE_ID_IPV4:
 779                 rule_hw->ipv4.src_ip = spec->ipv4.src_ip;
 780                 rule_hw->ipv4.src_ip_msk = spec->ipv4.src_ip_msk;
 781                 rule_hw->ipv4.dst_ip = spec->ipv4.dst_ip;
 782                 rule_hw->ipv4.dst_ip_msk = spec->ipv4.dst_ip_msk;
 783                 break;
 784
 785         case MLX4_NET_TRANS_RULE_ID_TCP:
 786         case MLX4_NET_TRANS_RULE_ID_UDP:
 787                 rule_hw->tcp_udp.dst_port = spec->tcp_udp.dst_port;
 788                 rule_hw->tcp_udp.dst_port_msk = spec->tcp_udp.dst_port_msk;
 789                 rule_hw->tcp_udp.src_port = spec->tcp_udp.src_port;
 790                 rule_hw->tcp_udp.src_port_msk = spec->tcp_udp.src_port_msk;
 791                 break;
 792
 793         case MLX4_NET_TRANS_RULE_ID_VXLAN:
 794                 rule_hw->vxlan.vni =
 795                         cpu_to_be32(be32_to_cpu(spec->vxlan.vni) << 8);
 796                 rule_hw->vxlan.vni_mask =
 797                         cpu_to_be32(be32_to_cpu(spec->vxlan.vni_mask) << 8);
 798                 break;
 799
 800         default:
 801                 return -EINVAL;
 802         }
 803
 804         return __rule_hw_sz[spec->id];
 805 }
 806
 807 static void mlx4_err_rule(struct mlx4_dev *dev, char *str,
 808                           struct mlx4_net_trans_rule *rule)
 809 {
 810 #define BUF_SIZE 256
 811         struct mlx4_spec_list *cur;
 812         char buf[BUF_SIZE];
 813         int len = 0;
 814
 815         mlx4_err(dev, "%s", str);
 816         len += snprintf(buf + len, BUF_SIZE - len,
 817                         "port = %d prio = 0x%x qp = 0x%x ",
 818                         rule->port, rule->priority, rule->qpn);
 819
 820         list_for_each_entry(cur, &rule->list, list) {
 821                 switch (cur->id) {
 822                 case MLX4_NET_TRANS_RULE_ID_ETH:
 823                         len += snprintf(buf + len, BUF_SIZE - len,
 824                                         "dmac = %pM ", &cur->eth.dst_mac);
 825                         if (cur->eth.ether_type)
 826                                 len += snprintf(buf + len, BUF_SIZE - len,
 827                                                 "ethertype = 0x%x ",
 828                                                 be16_to_cpu(cur->eth.ether_type));
 829                         if (cur->eth.vlan_id)
 830                                 len += snprintf(buf + len, BUF_SIZE - len,
 831                                                 "vlan-id = %d ",
 832                                                 be16_to_cpu(cur->eth.vlan_id));
 833                         break;
 834
 835                 case MLX4_NET_TRANS_RULE_ID_IPV4:
 836                         if (cur->ipv4.src_ip)
 837                                 len += snprintf(buf + len, BUF_SIZE - len,
 838                                                 "src-ip = %pI4 ",
 839                                                 &cur->ipv4.src_ip);
 840                         if (cur->ipv4.dst_ip)
 841                                 len += snprintf(buf + len, BUF_SIZE - len,
 842                                                 "dst-ip = %pI4 ",
 843                                                 &cur->ipv4.dst_ip);
 844                         break;
 845
 846                 case MLX4_NET_TRANS_RULE_ID_TCP:
 847                 case MLX4_NET_TRANS_RULE_ID_UDP:
 848                         if (cur->tcp_udp.src_port)
 849                                 len += snprintf(buf + len, BUF_SIZE - len,
 850                                                 "src-port = %d ",
 851                                                 be16_to_cpu(cur->tcp_udp.src_port));
 852                         if (cur->tcp_udp.dst_port)
 853                                 len += snprintf(buf + len, BUF_SIZE - len,
 854                                                 "dst-port = %d ",
 855                                                 be16_to_cpu(cur->tcp_udp.dst_port));
 856                         break;
 857
 858                 case MLX4_NET_TRANS_RULE_ID_IB:
 859                         len += snprintf(buf + len, BUF_SIZE - len,
 860                                         "dst-gid = %pI6\n", cur->ib.dst_gid);
 861                         len += snprintf(buf + len, BUF_SIZE - len,
 862                                         "dst-gid-mask = %pI6\n",
 863                                         cur->ib.dst_gid_msk);
 864                         break;
 865
 866                 case MLX4_NET_TRANS_RULE_ID_IPV6:
 867                         break;
 868
 869                 default:
 870                         break;
 871                 }
 872         }
 873         len += snprintf(buf + len, BUF_SIZE - len, "\n");
 874         mlx4_err(dev, "%s", buf);
 875
 876         if (len >= BUF_SIZE)
 877                 mlx4_err(dev, "Network rule error message was truncated, print buffer is too small.\n");
 878 }
 879
 880 int mlx4_flow_attach(struct mlx4_dev *dev,
 881                      struct mlx4_net_trans_rule *rule, u64 *reg_id)
 882 {
 883         struct mlx4_cmd_mailbox *mailbox;
 884         struct mlx4_spec_list *cur;
 885         u32 size = 0;
 886         int ret;
 887
 888         mailbox = mlx4_alloc_cmd_mailbox(dev);
 889         if (IS_ERR(mailbox))
 890                 return PTR_ERR(mailbox);
 891
 892         trans_rule_ctrl_to_hw(rule, mailbox->buf);
 893
 894         size += sizeof(struct mlx4_net_trans_rule_hw_ctrl);
 895
 896         list_for_each_entry(cur, &rule->list, list) {
 897                 ret = parse_trans_rule(dev, cur, mailbox->buf + size);
 898                 if (ret < 0) {
 899                         mlx4_free_cmd_mailbox(dev, mailbox);
 900                         return -EINVAL;
 901                 }
 902                 size += ret;
 903         }
 904
 905         ret = mlx4_QP_FLOW_STEERING_ATTACH(dev, mailbox, size >> 2, reg_id);
 906         if (ret == -ENOMEM)
 907                 mlx4_err_rule(dev,
 908                               "mcg table is full. Fail to register network rule.\n",
 909                               rule);
 910         else if (ret)
 911                 mlx4_err_rule(dev, "Fail to register network rule.\n", rule);
 912
 913         mlx4_free_cmd_mailbox(dev, mailbox);
 914
 915         return ret;
 916 }
 917 EXPORT_SYMBOL_GPL(mlx4_flow_attach);
 918
 919 int mlx4_flow_detach(struct mlx4_dev *dev, u64 reg_id)
 920 {
 921         int err;
 922
 923         err = mlx4_QP_FLOW_STEERING_DETACH(dev, reg_id);
 924         if (err)
 925                 mlx4_err(dev, "Fail to detach network rule. registration id = 0x%llx\n",
 926                          reg_id);
 927         return err;
 928 }
 929 EXPORT_SYMBOL_GPL(mlx4_flow_detach);
 930
 931 int mlx4_FLOW_STEERING_IB_UC_QP_RANGE(struct mlx4_dev *dev, u32 min_range_qpn,
 932                                       u32 max_range_qpn)
 933 {
 934         int err;
 935         u64 in_param;
 936
 937         in_param = ((u64) min_range_qpn) << 32;
 938         in_param |= ((u64) max_range_qpn) & 0xFFFFFFFF;
 939
 940         err = mlx4_cmd(dev, in_param, 0, 0,
 941                         MLX4_FLOW_STEERING_IB_UC_QP_RANGE,
 942                         MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
 943
 944         return err;
 945 }
 946 EXPORT_SYMBOL_GPL(mlx4_FLOW_STEERING_IB_UC_QP_RANGE);
 947
 948 int mlx4_qp_attach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
 949                           int block_mcast_loopback, enum mlx4_protocol prot,
 950                           enum mlx4_steer_type steer)
 951 {
 952         struct mlx4_priv *priv = mlx4_priv(dev);
 953         struct mlx4_cmd_mailbox *mailbox;
 954         struct mlx4_mgm *mgm;
 955         u32 members_count;
 956         int index, prev;
 957         int link = 0;
 958         int i;
 959         int err;
 960         u8 port = gid[5];
 961         u8 new_entry = 0;
 962
 963         mailbox = mlx4_alloc_cmd_mailbox(dev);
 964         if (IS_ERR(mailbox))
 965                 return PTR_ERR(mailbox);
 966         mgm = mailbox->buf;
 967
 968         mutex_lock(&priv->mcg_table.mutex);
 969         err = find_entry(dev, port, gid, prot,
 970                          mailbox, &prev, &index);
 971         if (err)
 972                 goto out;
 973
 974         if (index != -1) {
 975                 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
 976                         new_entry = 1;
 977                         memcpy(mgm->gid, gid, 16);
 978                 }
 979         } else {
 980                 link = 1;
 981
 982                 index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);
 983                 if (index == -1) {
 984                         mlx4_err(dev, "No AMGM entries left\n");
 985                         err = -ENOMEM;
 986                         goto out;
 987                 }
 988                 index += dev->caps.num_mgms;
 989
 990                 new_entry = 1;
 991                 memset(mgm, 0, sizeof *mgm);
 992                 memcpy(mgm->gid, gid, 16);
 993         }
 994
 995         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 996         if (members_count == dev->caps.num_qp_per_mgm) {
 997                 mlx4_err(dev, "MGM at index %x is full.\n", index);
 998                 err = -ENOMEM;
 999                 goto out;
1000         }
1001
1002         for (i = 0; i < members_count; ++i)
1003                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {
1004                         mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);
1005                         err = 0;
1006                         goto out;
1007                 }
1008
1009         if (block_mcast_loopback)
1010                 mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |
1011                                                        (1U << MGM_BLCK_LB_BIT));
1012         else
1013                 mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK);
1014
1015         mgm->members_count = cpu_to_be32(members_count | (u32) prot << 30);
1016
1017         err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1018         if (err)
1019                 goto out;
1020
1021         if (!link)
1022                 goto out;
1023
1024         err = mlx4_READ_ENTRY(dev, prev, mailbox);
1025         if (err)
1026                 goto out;
1027
1028         mgm->next_gid_index = cpu_to_be32(index << 6);
1029
1030         err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
1031         if (err)
1032                 goto out;
1033
1034 out:
1035         if (prot == MLX4_PROT_ETH) {
1036                 /* manage the steering entry for promisc mode */
1037                 if (new_entry)
1038                         new_steering_entry(dev, port, steer, index, qp->qpn);
1039                 else
1040                         existing_steering_entry(dev, port, steer,
1041                                                 index, qp->qpn);
1042         }
1043         if (err && link && index != -1) {
1044                 if (index < dev->caps.num_mgms)
1045                         mlx4_warn(dev, "Got AMGM index %d < %d",
1046                                   index, dev->caps.num_mgms);
1047                 else
1048                         mlx4_bitmap_free(&priv->mcg_table.bitmap,
1049                                          index - dev->caps.num_mgms, MLX4_USE_RR);
1050         }
1051         mutex_unlock(&priv->mcg_table.mutex);
1052
1053         mlx4_free_cmd_mailbox(dev, mailbox);
1054         return err;
1055 }
1056
1057 int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1058                           enum mlx4_protocol prot, enum mlx4_steer_type steer)
1059 {
1060         struct mlx4_priv *priv = mlx4_priv(dev);
1061         struct mlx4_cmd_mailbox *mailbox;
1062         struct mlx4_mgm *mgm;
1063         u32 members_count;
1064         int prev, index;
1065         int i, loc;
1066         int err;
1067         u8 port = gid[5];
1068         bool removed_entry = false;
1069
1070         mailbox = mlx4_alloc_cmd_mailbox(dev);
1071         if (IS_ERR(mailbox))
1072                 return PTR_ERR(mailbox);
1073         mgm = mailbox->buf;
1074
1075         mutex_lock(&priv->mcg_table.mutex);
1076
1077         err = find_entry(dev, port, gid, prot,
1078                          mailbox, &prev, &index);
1079         if (err)
1080                 goto out;
1081
1082         if (index == -1) {
1083                 mlx4_err(dev, "MGID %pI6 not found\n", gid);
1084                 err = -EINVAL;
1085                 goto out;
1086         }
1087
1088         /* if this pq is also a promisc qp, it shouldn't be removed */
1089         if (prot == MLX4_PROT_ETH &&
1090             check_duplicate_entry(dev, port, steer, index, qp->qpn))
1091                 goto out;
1092
1093         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
1094         for (loc = -1, i = 0; i < members_count; ++i)
1095                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn)
1096                         loc = i;
1097
1098         if (loc == -1) {
1099                 mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);
1100                 err = -EINVAL;
1101                 goto out;
1102         }
1103
1104
1105         mgm->members_count = cpu_to_be32(--members_count | (u32) prot << 30);
1106         mgm->qp[loc]       = mgm->qp[i - 1];
1107         mgm->qp[i - 1]     = 0;
1108
1109         if (prot == MLX4_PROT_ETH)
1110                 removed_entry = can_remove_steering_entry(dev, port, steer,
1111                                                                 index, qp->qpn);
1112         if (i != 1 && (prot != MLX4_PROT_ETH || !removed_entry)) {
1113                 err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1114                 goto out;
1115         }
1116
1117         /* We are going to delete the entry, members count should be 0 */
1118         mgm->members_count = cpu_to_be32((u32) prot << 30);
1119
1120         if (prev == -1) {
1121                 /* Remove entry from MGM */
1122                 int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;
1123                 if (amgm_index) {
1124                         err = mlx4_READ_ENTRY(dev, amgm_index, mailbox);
1125                         if (err)
1126                                 goto out;
1127                 } else
1128                         memset(mgm->gid, 0, 16);
1129
1130                 err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1131                 if (err)
1132                         goto out;
1133
1134                 if (amgm_index) {
1135                         if (amgm_index < dev->caps.num_mgms)
1136                                 mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d",
1137                                           index, amgm_index, dev->caps.num_mgms);
1138                         else
1139                                 mlx4_bitmap_free(&priv->mcg_table.bitmap,
1140                                                  amgm_index - dev->caps.num_mgms, MLX4_USE_RR);
1141                 }
1142         } else {
1143                 /* Remove entry from AMGM */
1144                 int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;
1145                 err = mlx4_READ_ENTRY(dev, prev, mailbox);
1146                 if (err)
1147                         goto out;
1148
1149                 mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);
1150
1151                 err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
1152                 if (err)
1153                         goto out;
1154
1155                 if (index < dev->caps.num_mgms)
1156                         mlx4_warn(dev, "entry %d had next AMGM index %d < %d",
1157                                   prev, index, dev->caps.num_mgms);
1158                 else
1159                         mlx4_bitmap_free(&priv->mcg_table.bitmap,
1160                                          index - dev->caps.num_mgms, MLX4_USE_RR);
1161         }
1162
1163 out:
1164         mutex_unlock(&priv->mcg_table.mutex);
1165
1166         mlx4_free_cmd_mailbox(dev, mailbox);
1167         return err;
1168 }
1169
1170 static int mlx4_QP_ATTACH(struct mlx4_dev *dev, struct mlx4_qp *qp,
1171                           u8 gid[16], u8 attach, u8 block_loopback,
1172                           enum mlx4_protocol prot)
1173 {
1174         struct mlx4_cmd_mailbox *mailbox;
1175         int err = 0;
1176         int qpn;
1177
1178         if (!mlx4_is_mfunc(dev))
1179                 return -EBADF;
1180
1181         mailbox = mlx4_alloc_cmd_mailbox(dev);
1182         if (IS_ERR(mailbox))
1183                 return PTR_ERR(mailbox);
1184
1185         memcpy(mailbox->buf, gid, 16);
1186         qpn = qp->qpn;
1187         qpn |= (prot << 28);
1188         if (attach && block_loopback)
1189                 qpn |= (1 << 31);
1190
1191         err = mlx4_cmd(dev, mailbox->dma, qpn, attach,
1192                        MLX4_CMD_QP_ATTACH, MLX4_CMD_TIME_CLASS_A,
1193                        MLX4_CMD_WRAPPED);
1194
1195         mlx4_free_cmd_mailbox(dev, mailbox);
1196         return err;
1197 }
1198
1199 int mlx4_trans_to_dmfs_attach(struct mlx4_dev *dev, struct mlx4_qp *qp,
1200                               u8 gid[16], u8 port,
1201                               int block_mcast_loopback,
1202                               enum mlx4_protocol prot, u64 *reg_id)
1203 {
1204                 struct mlx4_spec_list spec = { {NULL} };
1205                 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
1206
1207                 struct mlx4_net_trans_rule rule = {
1208                         .queue_mode = MLX4_NET_TRANS_Q_FIFO,
1209                         .exclusive = 0,
1210                         .promisc_mode = MLX4_FS_REGULAR,
1211                         .priority = MLX4_DOMAIN_NIC,
1212                 };
1213
1214                 rule.allow_loopback = !block_mcast_loopback;
1215                 rule.port = port;
1216                 rule.qpn = qp->qpn;
1217                 INIT_LIST_HEAD(&rule.list);
1218
1219                 switch (prot) {
1220                 case MLX4_PROT_ETH:
1221                         spec.id = MLX4_NET_TRANS_RULE_ID_ETH;
1222                         memcpy(spec.eth.dst_mac, &gid[10], ETH_ALEN);
1223                         memcpy(spec.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
1224                         break;
1225
1226                 case MLX4_PROT_IB_IPV6:
1227                         spec.id = MLX4_NET_TRANS_RULE_ID_IB;
1228                         memcpy(spec.ib.dst_gid, gid, 16);
1229                         memset(&spec.ib.dst_gid_msk, 0xff, 16);
1230                         break;
1231                 default:
1232                         return -EINVAL;
1233                 }
1234                 list_add_tail(&spec.list, &rule.list);
1235
1236                 return mlx4_flow_attach(dev, &rule, reg_id);
1237 }
1238
1239 int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1240                           u8 port, int block_mcast_loopback,
1241                           enum mlx4_protocol prot, u64 *reg_id)
1242 {
1243         switch (dev->caps.steering_mode) {
1244         case MLX4_STEERING_MODE_A0:
1245                 if (prot == MLX4_PROT_ETH)
1246                         return 0;
1247
1248         case MLX4_STEERING_MODE_B0:
1249                 if (prot == MLX4_PROT_ETH)
1250                         gid[7] |= (MLX4_MC_STEER << 1);
1251
1252                 if (mlx4_is_mfunc(dev))
1253                         return mlx4_QP_ATTACH(dev, qp, gid, 1,
1254                                               block_mcast_loopback, prot);
1255                 return mlx4_qp_attach_common(dev, qp, gid,
1256                                              block_mcast_loopback, prot,
1257                                              MLX4_MC_STEER);
1258
1259         case MLX4_STEERING_MODE_DEVICE_MANAGED:
1260                 return mlx4_trans_to_dmfs_attach(dev, qp, gid, port,
1261                                                  block_mcast_loopback,
1262                                                  prot, reg_id);
1263         default:
1264                 return -EINVAL;
1265         }
1266 }
1267 EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
1268
1269 int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1270                           enum mlx4_protocol prot, u64 reg_id)
1271 {
1272         switch (dev->caps.steering_mode) {
1273         case MLX4_STEERING_MODE_A0:
1274                 if (prot == MLX4_PROT_ETH)
1275                         return 0;
1276
1277         case MLX4_STEERING_MODE_B0:
1278                 if (prot == MLX4_PROT_ETH)
1279                         gid[7] |= (MLX4_MC_STEER << 1);
1280
1281                 if (mlx4_is_mfunc(dev))
1282                         return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);
1283
1284                 return mlx4_qp_detach_common(dev, qp, gid, prot,
1285                                              MLX4_MC_STEER);
1286
1287         case MLX4_STEERING_MODE_DEVICE_MANAGED:
1288                 return mlx4_flow_detach(dev, reg_id);
1289
1290         default:
1291                 return -EINVAL;
1292         }
1293 }
1294 EXPORT_SYMBOL_GPL(mlx4_multicast_detach);
1295
1296 int mlx4_flow_steer_promisc_add(struct mlx4_dev *dev, u8 port,
1297                                 u32 qpn, enum mlx4_net_trans_promisc_mode mode)
1298 {
1299         struct mlx4_net_trans_rule rule;
1300         u64 *regid_p;
1301
1302         switch (mode) {
1303         case MLX4_FS_ALL_DEFAULT:
1304                 regid_p = &dev->regid_promisc_array[port];
1305                 break;
1306         case MLX4_FS_MC_DEFAULT:
1307                 regid_p = &dev->regid_allmulti_array[port];
1308                 break;
1309         default:
1310                 return -1;
1311         }
1312
1313         if (*regid_p != 0)
1314                 return -1;
1315
1316         rule.promisc_mode = mode;
1317         rule.port = port;
1318         rule.qpn = qpn;
1319         INIT_LIST_HEAD(&rule.list);
1320         mlx4_err(dev, "going promisc on %x\n", port);
1321
1322         return  mlx4_flow_attach(dev, &rule, regid_p);
1323 }
1324 EXPORT_SYMBOL_GPL(mlx4_flow_steer_promisc_add);
1325
1326 int mlx4_flow_steer_promisc_remove(struct mlx4_dev *dev, u8 port,
1327                                    enum mlx4_net_trans_promisc_mode mode)
1328 {
1329         int ret;
1330         u64 *regid_p;
1331
1332         switch (mode) {
1333         case MLX4_FS_ALL_DEFAULT:
1334                 regid_p = &dev->regid_promisc_array[port];
1335                 break;
1336         case MLX4_FS_MC_DEFAULT:
1337                 regid_p = &dev->regid_allmulti_array[port];
1338                 break;
1339         default:
1340                 return -1;
1341         }
1342
1343         if (*regid_p == 0)
1344                 return -1;
1345
1346         ret =  mlx4_flow_detach(dev, *regid_p);
1347         if (ret == 0)
1348                 *regid_p = 0;
1349
1350         return ret;
1351 }
1352 EXPORT_SYMBOL_GPL(mlx4_flow_steer_promisc_remove);
1353
1354 int mlx4_unicast_attach(struct mlx4_dev *dev,
1355                         struct mlx4_qp *qp, u8 gid[16],
1356                         int block_mcast_loopback, enum mlx4_protocol prot)
1357 {
1358         if (prot == MLX4_PROT_ETH)
1359                 gid[7] |= (MLX4_UC_STEER << 1);
1360
1361         if (mlx4_is_mfunc(dev))
1362                 return mlx4_QP_ATTACH(dev, qp, gid, 1,
1363                                         block_mcast_loopback, prot);
1364
1365         return mlx4_qp_attach_common(dev, qp, gid, block_mcast_loopback,
1366                                         prot, MLX4_UC_STEER);
1367 }
1368 EXPORT_SYMBOL_GPL(mlx4_unicast_attach);
1369
1370 int mlx4_unicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp,
1371                                u8 gid[16], enum mlx4_protocol prot)
1372 {
1373         if (prot == MLX4_PROT_ETH)
1374                 gid[7] |= (MLX4_UC_STEER << 1);
1375
1376         if (mlx4_is_mfunc(dev))
1377                 return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);
1378
1379         return mlx4_qp_detach_common(dev, qp, gid, prot, MLX4_UC_STEER);
1380 }
1381 EXPORT_SYMBOL_GPL(mlx4_unicast_detach);
1382
1383 int mlx4_PROMISC_wrapper(struct mlx4_dev *dev, int slave,
1384                          struct mlx4_vhcr *vhcr,
1385                          struct mlx4_cmd_mailbox *inbox,
1386                          struct mlx4_cmd_mailbox *outbox,
1387                          struct mlx4_cmd_info *cmd)
1388 {
1389         u32 qpn = (u32) vhcr->in_param & 0xffffffff;
1390         u8 port = vhcr->in_param >> 62;
1391         enum mlx4_steer_type steer = vhcr->in_modifier;
1392
1393         /* Promiscuous unicast is not allowed in mfunc */
1394         if (mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)
1395                 return 0;
1396
1397         if (vhcr->op_modifier)
1398                 return add_promisc_qp(dev, port, steer, qpn);
1399         else
1400                 return remove_promisc_qp(dev, port, steer, qpn);
1401 }
1402
1403 static int mlx4_PROMISC(struct mlx4_dev *dev, u32 qpn,
1404                         enum mlx4_steer_type steer, u8 add, u8 port)
1405 {
1406         return mlx4_cmd(dev, (u64) qpn | (u64) port << 62, (u32) steer, add,
1407                         MLX4_CMD_PROMISC, MLX4_CMD_TIME_CLASS_A,
1408                         MLX4_CMD_WRAPPED);
1409 }
1410
1411 int mlx4_multicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
1412 {
1413         if (mlx4_is_mfunc(dev))
1414                 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 1, port);
1415
1416         return add_promisc_qp(dev, port, MLX4_MC_STEER, qpn);
1417 }
1418 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_add);
1419
1420 int mlx4_multicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
1421 {
1422         if (mlx4_is_mfunc(dev))
1423                 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 0, port);
1424
1425         return remove_promisc_qp(dev, port, MLX4_MC_STEER, qpn);
1426 }
1427 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_remove);
1428
1429 int mlx4_unicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
1430 {
1431         if (mlx4_is_mfunc(dev))
1432                 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 1, port);
1433
1434         return add_promisc_qp(dev, port, MLX4_UC_STEER, qpn);
1435 }
1436 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_add);
1437
1438 int mlx4_unicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
1439 {
1440         if (mlx4_is_mfunc(dev))
1441                 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 0, port);
1442
1443         return remove_promisc_qp(dev, port, MLX4_UC_STEER, qpn);
1444 }
1445 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_remove);
1446
1447 int mlx4_init_mcg_table(struct mlx4_dev *dev)
1448 {
1449         struct mlx4_priv *priv = mlx4_priv(dev);
1450         int err;
1451
1452         /* No need for mcg_table when fw managed the mcg table*/
1453         if (dev->caps.steering_mode ==
1454             MLX4_STEERING_MODE_DEVICE_MANAGED)
1455                 return 0;
1456         err = mlx4_bitmap_init(&priv->mcg_table.bitmap, dev->caps.num_amgms,
1457                                dev->caps.num_amgms - 1, 0, 0);
1458         if (err)
1459                 return err;
1460
1461         mutex_init(&priv->mcg_table.mutex);
1462
1463         return 0;
1464 }
1465
1466 void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)
1467 {
1468         if (dev->caps.steering_mode !=
1469             MLX4_STEERING_MODE_DEVICE_MANAGED)
1470                 mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);
1471 }