drivers/net/ethernet/mellanox/mlx4/mcg.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
mlx4_get_mgm_entry_size
mlx4_get_qp_per_mgm
mlx4_QP_FLOW_STEERING_ATTACH
mlx4_QP_FLOW_STEERING_DETACH
mlx4_READ_ENTRY
mlx4_WRITE_ENTRY
mlx4_WRITE_PROMISC
mlx4_GID_HASH
get_promisc_qp
new_steering_entry
existing_steering_entry
check_duplicate_entry
promisc_steering_entry
can_remove_steering_entry
add_promisc_qp
remove_promisc_qp
find_entry
mlx4_map_sw_to_hw_steering_mode
trans_rule_ctrl_to_hw
mlx4_map_sw_to_hw_steering_id
mlx4_hw_rule_sz
parse_trans_rule
mlx4_err_rule
mlx4_flow_attach
mlx4_flow_detach
mlx4_tunnel_steer_add
mlx4_FLOW_STEERING_IB_UC_QP_RANGE
mlx4_qp_attach_common
mlx4_qp_detach_common
mlx4_QP_ATTACH
mlx4_trans_to_dmfs_attach
mlx4_multicast_attach
mlx4_multicast_detach
mlx4_flow_steer_promisc_add
mlx4_flow_steer_promisc_remove
mlx4_unicast_attach
mlx4_unicast_detach
mlx4_PROMISC_wrapper
mlx4_PROMISC
mlx4_multicast_promisc_add
mlx4_multicast_promisc_remove
mlx4_unicast_promisc_add
mlx4_unicast_promisc_remove
mlx4_init_mcg_table
mlx4_cleanup_mcg_table
   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/mlx4/qp.h>
  39 #include <linux/export.h>
  40 
  41 #include "mlx4.h"
  42 
  43 int mlx4_get_mgm_entry_size(struct mlx4_dev *dev)
  44 {
  45         return 1 << dev->oper_log_mgm_entry_size;
  46 }
  47 
  48 int mlx4_get_qp_per_mgm(struct mlx4_dev *dev)
  49 {
  50         return 4 * (mlx4_get_mgm_entry_size(dev) / 16 - 2);
  51 }
  52 
  53 static int mlx4_QP_FLOW_STEERING_ATTACH(struct mlx4_dev *dev,
  54                                         struct mlx4_cmd_mailbox *mailbox,
  55                                         u32 size,
  56                                         u64 *reg_id)
  57 {
  58         u64 imm;
  59         int err = 0;
  60 
  61         err = mlx4_cmd_imm(dev, mailbox->dma, &imm, size, 0,
  62                            MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
  63                            MLX4_CMD_NATIVE);
  64         if (err)
  65                 return err;
  66         *reg_id = imm;
  67 
  68         return err;
  69 }
  70 
  71 static int mlx4_QP_FLOW_STEERING_DETACH(struct mlx4_dev *dev, u64 regid)
  72 {
  73         int err = 0;
  74 
  75         err = mlx4_cmd(dev, regid, 0, 0,
  76                        MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
  77                        MLX4_CMD_NATIVE);
  78 
  79         return err;
  80 }
  81 
  82 static int mlx4_READ_ENTRY(struct mlx4_dev *dev, int index,
  83                            struct mlx4_cmd_mailbox *mailbox)
  84 {
  85         return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG,
  86                             MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
  87 }
  88 
  89 static int mlx4_WRITE_ENTRY(struct mlx4_dev *dev, int index,
  90                             struct mlx4_cmd_mailbox *mailbox)
  91 {
  92         return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG,
  93                         MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
  94 }
  95 
  96 static int mlx4_WRITE_PROMISC(struct mlx4_dev *dev, u8 port, u8 steer,
  97                               struct mlx4_cmd_mailbox *mailbox)
  98 {
  99         u32 in_mod;
 100 
 101         in_mod = (u32) port << 16 | steer << 1;
 102         return mlx4_cmd(dev, mailbox->dma, in_mod, 0x1,
 103                         MLX4_CMD_WRITE_MCG, MLX4_CMD_TIME_CLASS_A,
 104                         MLX4_CMD_NATIVE);
 105 }
 106 
 107 static int mlx4_GID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
 108                          u16 *hash, u8 op_mod)
 109 {
 110         u64 imm;
 111         int err;
 112 
 113         err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, op_mod,
 114                            MLX4_CMD_MGID_HASH, MLX4_CMD_TIME_CLASS_A,
 115                            MLX4_CMD_NATIVE);
 116 
 117         if (!err)
 118                 *hash = imm;
 119 
 120         return err;
 121 }
 122 
 123 static struct mlx4_promisc_qp *get_promisc_qp(struct mlx4_dev *dev, u8 port,
 124                                               enum mlx4_steer_type steer,
 125                                               u32 qpn)
 126 {
 127         struct mlx4_steer *s_steer;
 128         struct mlx4_promisc_qp *pqp;
 129 
 130         if (port < 1 || port > dev->caps.num_ports)
 131                 return NULL;
 132 
 133         s_steer = &mlx4_priv(dev)->steer[port - 1];
 134 
 135         list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {
 136                 if (pqp->qpn == qpn)
 137                         return pqp;
 138         }
 139         /* not found */
 140         return NULL;
 141 }
 142 
 143 /*
 144  * Add new entry to steering data structure.
 145  * All promisc QPs should be added as well
 146  */
 147 static int new_steering_entry(struct mlx4_dev *dev, u8 port,
 148                               enum mlx4_steer_type steer,
 149                               unsigned int index, u32 qpn)
 150 {
 151         struct mlx4_steer *s_steer;
 152         struct mlx4_cmd_mailbox *mailbox;
 153         struct mlx4_mgm *mgm;
 154         u32 members_count;
 155         struct mlx4_steer_index *new_entry;
 156         struct mlx4_promisc_qp *pqp;
 157         struct mlx4_promisc_qp *dqp = NULL;
 158         u32 prot;
 159         int err;
 160 
 161         if (port < 1 || port > dev->caps.num_ports)
 162                 return -EINVAL;
 163 
 164         s_steer = &mlx4_priv(dev)->steer[port - 1];
 165         new_entry = kzalloc(sizeof(*new_entry), GFP_KERNEL);
 166         if (!new_entry)
 167                 return -ENOMEM;
 168 
 169         INIT_LIST_HEAD(&new_entry->duplicates);
 170         new_entry->index = index;
 171         list_add_tail(&new_entry->list, &s_steer->steer_entries[steer]);
 172 
 173         /* If the given qpn is also a promisc qp,
 174          * it should be inserted to duplicates list
 175          */
 176         pqp = get_promisc_qp(dev, port, steer, qpn);
 177         if (pqp) {
 178                 dqp = kmalloc(sizeof(*dqp), GFP_KERNEL);
 179                 if (!dqp) {
 180                         err = -ENOMEM;
 181                         goto out_alloc;
 182                 }
 183                 dqp->qpn = qpn;
 184                 list_add_tail(&dqp->list, &new_entry->duplicates);
 185         }
 186 
 187         /* if no promisc qps for this vep, we are done */
 188         if (list_empty(&s_steer->promisc_qps[steer]))
 189                 return 0;
 190 
 191         /* now need to add all the promisc qps to the new
 192          * steering entry, as they should also receive the packets
 193          * destined to this address */
 194         mailbox = mlx4_alloc_cmd_mailbox(dev);
 195         if (IS_ERR(mailbox)) {
 196                 err = -ENOMEM;
 197                 goto out_alloc;
 198         }
 199         mgm = mailbox->buf;
 200 
 201         err = mlx4_READ_ENTRY(dev, index, mailbox);
 202         if (err)
 203                 goto out_mailbox;
 204 
 205         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 206         prot = be32_to_cpu(mgm->members_count) >> 30;
 207         list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {
 208                 /* don't add already existing qpn */
 209                 if (pqp->qpn == qpn)
 210                         continue;
 211                 if (members_count == dev->caps.num_qp_per_mgm) {
 212                         /* out of space */
 213                         err = -ENOMEM;
 214                         goto out_mailbox;
 215                 }
 216 
 217                 /* add the qpn */
 218                 mgm->qp[members_count++] = cpu_to_be32(pqp->qpn & MGM_QPN_MASK);
 219         }
 220         /* update the qps count and update the entry with all the promisc qps*/
 221         mgm->members_count = cpu_to_be32(members_count | (prot << 30));
 222         err = mlx4_WRITE_ENTRY(dev, index, mailbox);
 223 
 224 out_mailbox:
 225         mlx4_free_cmd_mailbox(dev, mailbox);
 226         if (!err)
 227                 return 0;
 228 out_alloc:
 229         if (dqp) {
 230                 list_del(&dqp->list);
 231                 kfree(dqp);
 232         }
 233         list_del(&new_entry->list);
 234         kfree(new_entry);
 235         return err;
 236 }
 237 
 238 /* update the data structures with existing steering entry */
 239 static int existing_steering_entry(struct mlx4_dev *dev, u8 port,
 240                                    enum mlx4_steer_type steer,
 241                                    unsigned int index, u32 qpn)
 242 {
 243         struct mlx4_steer *s_steer;
 244         struct mlx4_steer_index *tmp_entry, *entry = NULL;
 245         struct mlx4_promisc_qp *pqp;
 246         struct mlx4_promisc_qp *dqp;
 247 
 248         if (port < 1 || port > dev->caps.num_ports)
 249                 return -EINVAL;
 250 
 251         s_steer = &mlx4_priv(dev)->steer[port - 1];
 252 
 253         pqp = get_promisc_qp(dev, port, steer, qpn);
 254         if (!pqp)
 255                 return 0; /* nothing to do */
 256 
 257         list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {
 258                 if (tmp_entry->index == index) {
 259                         entry = tmp_entry;
 260                         break;
 261                 }
 262         }
 263         if (unlikely(!entry)) {
 264                 mlx4_warn(dev, "Steering entry at index %x is not registered\n", index);
 265                 return -EINVAL;
 266         }
 267 
 268         /* the given qpn is listed as a promisc qpn
 269          * we need to add it as a duplicate to this entry
 270          * for future references */
 271         list_for_each_entry(dqp, &entry->duplicates, list) {
 272                 if (qpn == dqp->qpn)
 273                         return 0; /* qp is already duplicated */
 274         }
 275 
 276         /* add the qp as a duplicate on this index */
 277         dqp = kmalloc(sizeof(*dqp), GFP_KERNEL);
 278         if (!dqp)
 279                 return -ENOMEM;
 280         dqp->qpn = qpn;
 281         list_add_tail(&dqp->list, &entry->duplicates);
 282 
 283         return 0;
 284 }
 285 
 286 /* Check whether a qpn is a duplicate on steering entry
 287  * If so, it should not be removed from mgm */
 288 static bool check_duplicate_entry(struct mlx4_dev *dev, u8 port,
 289                                   enum mlx4_steer_type steer,
 290                                   unsigned int index, u32 qpn)
 291 {
 292         struct mlx4_steer *s_steer;
 293         struct mlx4_steer_index *tmp_entry, *entry = NULL;
 294         struct mlx4_promisc_qp *dqp, *tmp_dqp;
 295 
 296         if (port < 1 || port > dev->caps.num_ports)
 297                 return NULL;
 298 
 299         s_steer = &mlx4_priv(dev)->steer[port - 1];
 300 
 301         /* if qp is not promisc, it cannot be duplicated */
 302         if (!get_promisc_qp(dev, port, steer, qpn))
 303                 return false;
 304 
 305         /* The qp is promisc qp so it is a duplicate on this index
 306          * Find the index entry, and remove the duplicate */
 307         list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {
 308                 if (tmp_entry->index == index) {
 309                         entry = tmp_entry;
 310                         break;
 311                 }
 312         }
 313         if (unlikely(!entry)) {
 314                 mlx4_warn(dev, "Steering entry for index %x is not registered\n", index);
 315                 return false;
 316         }
 317         list_for_each_entry_safe(dqp, tmp_dqp, &entry->duplicates, list) {
 318                 if (dqp->qpn == qpn) {
 319                         list_del(&dqp->list);
 320                         kfree(dqp);
 321                 }
 322         }
 323         return true;
 324 }
 325 
 326 /* Returns true if all the QPs != tqpn contained in this entry
 327  * are Promisc QPs. Returns false otherwise.
 328  */
 329 static bool promisc_steering_entry(struct mlx4_dev *dev, u8 port,
 330                                    enum mlx4_steer_type steer,
 331                                    unsigned int index, u32 tqpn,
 332                                    u32 *members_count)
 333 {
 334         struct mlx4_cmd_mailbox *mailbox;
 335         struct mlx4_mgm *mgm;
 336         u32 m_count;
 337         bool ret = false;
 338         int i;
 339 
 340         if (port < 1 || port > dev->caps.num_ports)
 341                 return false;
 342 
 343         mailbox = mlx4_alloc_cmd_mailbox(dev);
 344         if (IS_ERR(mailbox))
 345                 return false;
 346         mgm = mailbox->buf;
 347 
 348         if (mlx4_READ_ENTRY(dev, index, mailbox))
 349                 goto out;
 350         m_count = be32_to_cpu(mgm->members_count) & 0xffffff;
 351         if (members_count)
 352                 *members_count = m_count;
 353 
 354         for (i = 0;  i < m_count; i++) {
 355                 u32 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         ret = true;
 362 out:
 363         mlx4_free_cmd_mailbox(dev, mailbox);
 364         return ret;
 365 }
 366 
 367 /* IF a steering entry contains only promisc QPs, it can be removed. */
 368 static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,
 369                                       enum mlx4_steer_type steer,
 370                                       unsigned int index, u32 tqpn)
 371 {
 372         struct mlx4_steer *s_steer;
 373         struct mlx4_steer_index *entry = NULL, *tmp_entry;
 374         u32 members_count;
 375         bool ret = false;
 376 
 377         if (port < 1 || port > dev->caps.num_ports)
 378                 return NULL;
 379 
 380         s_steer = &mlx4_priv(dev)->steer[port - 1];
 381 
 382         if (!promisc_steering_entry(dev, port, steer, index,
 383                                     tqpn, &members_count))
 384                 goto out;
 385 
 386         /* All the qps currently registered for this entry are promiscuous,
 387           * Checking for duplicates */
 388         ret = true;
 389         list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) {
 390                 if (entry->index == index) {
 391                         if (list_empty(&entry->duplicates) ||
 392                             members_count == 1) {
 393                                 struct mlx4_promisc_qp *pqp, *tmp_pqp;
 394                                 /* If there is only 1 entry in duplicates then
 395                                  * this is the QP we want to delete, going over
 396                                  * the list and deleting the entry.
 397                                  */
 398                                 list_del(&entry->list);
 399                                 list_for_each_entry_safe(pqp, tmp_pqp,
 400                                                          &entry->duplicates,
 401                                                          list) {
 402                                         list_del(&pqp->list);
 403                                         kfree(pqp);
 404                                 }
 405                                 kfree(entry);
 406                         } else {
 407                                 /* This entry contains duplicates so it shouldn't be removed */
 408                                 ret = false;
 409                                 goto out;
 410                         }
 411                 }
 412         }
 413 
 414 out:
 415         return ret;
 416 }
 417 
 418 static int add_promisc_qp(struct mlx4_dev *dev, u8 port,
 419                           enum mlx4_steer_type steer, u32 qpn)
 420 {
 421         struct mlx4_steer *s_steer;
 422         struct mlx4_cmd_mailbox *mailbox;
 423         struct mlx4_mgm *mgm;
 424         struct mlx4_steer_index *entry;
 425         struct mlx4_promisc_qp *pqp;
 426         struct mlx4_promisc_qp *dqp;
 427         u32 members_count;
 428         u32 prot;
 429         int i;
 430         bool found;
 431         int err;
 432         struct mlx4_priv *priv = mlx4_priv(dev);
 433 
 434         if (port < 1 || port > dev->caps.num_ports)
 435                 return -EINVAL;
 436 
 437         s_steer = &mlx4_priv(dev)->steer[port - 1];
 438 
 439         mutex_lock(&priv->mcg_table.mutex);
 440 
 441         if (get_promisc_qp(dev, port, steer, qpn)) {
 442                 err = 0;  /* Noting to do, already exists */
 443                 goto out_mutex;
 444         }
 445 
 446         pqp = kmalloc(sizeof(*pqp), GFP_KERNEL);
 447         if (!pqp) {
 448                 err = -ENOMEM;
 449                 goto out_mutex;
 450         }
 451         pqp->qpn = qpn;
 452 
 453         mailbox = mlx4_alloc_cmd_mailbox(dev);
 454         if (IS_ERR(mailbox)) {
 455                 err = -ENOMEM;
 456                 goto out_alloc;
 457         }
 458         mgm = mailbox->buf;
 459 
 460         if (!(mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)) {
 461                 /* The promisc QP needs to be added for each one of the steering
 462                  * entries. If it already exists, needs to be added as
 463                  * a duplicate for this entry.
 464                  */
 465                 list_for_each_entry(entry,
 466                                     &s_steer->steer_entries[steer],
 467                                     list) {
 468                         err = mlx4_READ_ENTRY(dev, entry->index, mailbox);
 469                         if (err)
 470                                 goto out_mailbox;
 471 
 472                         members_count = be32_to_cpu(mgm->members_count) &
 473                                         0xffffff;
 474                         prot = be32_to_cpu(mgm->members_count) >> 30;
 475                         found = false;
 476                         for (i = 0; i < members_count; i++) {
 477                                 if ((be32_to_cpu(mgm->qp[i]) &
 478                                      MGM_QPN_MASK) == qpn) {
 479                                         /* Entry already exists.
 480                                          * Add to duplicates.
 481                                          */
 482                                         dqp = kmalloc(sizeof(*dqp), GFP_KERNEL);
 483                                         if (!dqp) {
 484                                                 err = -ENOMEM;
 485                                                 goto out_mailbox;
 486                                         }
 487                                         dqp->qpn = qpn;
 488                                         list_add_tail(&dqp->list,
 489                                                       &entry->duplicates);
 490                                         found = true;
 491                                 }
 492                         }
 493                         if (!found) {
 494                                 /* Need to add the qpn to mgm */
 495                                 if (members_count ==
 496                                     dev->caps.num_qp_per_mgm) {
 497                                         /* entry is full */
 498                                         err = -ENOMEM;
 499                                         goto out_mailbox;
 500                                 }
 501                                 mgm->qp[members_count++] =
 502                                         cpu_to_be32(qpn & MGM_QPN_MASK);
 503                                 mgm->members_count =
 504                                         cpu_to_be32(members_count |
 505                                                     (prot << 30));
 506                                 err = mlx4_WRITE_ENTRY(dev, entry->index,
 507                                                        mailbox);
 508                                 if (err)
 509                                         goto out_mailbox;
 510                         }
 511                 }
 512         }
 513 
 514         /* add the new qpn to list of promisc qps */
 515         list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
 516         /* now need to add all the promisc qps to default entry */
 517         memset(mgm, 0, sizeof(*mgm));
 518         members_count = 0;
 519         list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list) {
 520                 if (members_count == dev->caps.num_qp_per_mgm) {
 521                         /* entry is full */
 522                         err = -ENOMEM;
 523                         goto out_list;
 524                 }
 525                 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
 526         }
 527         mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
 528 
 529         err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);
 530         if (err)
 531                 goto out_list;
 532 
 533         mlx4_free_cmd_mailbox(dev, mailbox);
 534         mutex_unlock(&priv->mcg_table.mutex);
 535         return 0;
 536 
 537 out_list:
 538         list_del(&pqp->list);
 539 out_mailbox:
 540         mlx4_free_cmd_mailbox(dev, mailbox);
 541 out_alloc:
 542         kfree(pqp);
 543 out_mutex:
 544         mutex_unlock(&priv->mcg_table.mutex);
 545         return err;
 546 }
 547 
 548 static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,
 549                              enum mlx4_steer_type steer, u32 qpn)
 550 {
 551         struct mlx4_priv *priv = mlx4_priv(dev);
 552         struct mlx4_steer *s_steer;
 553         struct mlx4_cmd_mailbox *mailbox;
 554         struct mlx4_mgm *mgm;
 555         struct mlx4_steer_index *entry, *tmp_entry;
 556         struct mlx4_promisc_qp *pqp;
 557         struct mlx4_promisc_qp *dqp;
 558         u32 members_count;
 559         bool found;
 560         bool back_to_list = false;
 561         int i;
 562         int err;
 563 
 564         if (port < 1 || port > dev->caps.num_ports)
 565                 return -EINVAL;
 566 
 567         s_steer = &mlx4_priv(dev)->steer[port - 1];
 568         mutex_lock(&priv->mcg_table.mutex);
 569 
 570         pqp = get_promisc_qp(dev, port, steer, qpn);
 571         if (unlikely(!pqp)) {
 572                 mlx4_warn(dev, "QP %x is not promiscuous QP\n", qpn);
 573                 /* nothing to do */
 574                 err = 0;
 575                 goto out_mutex;
 576         }
 577 
 578         /*remove from list of promisc qps */
 579         list_del(&pqp->list);
 580 
 581         /* set the default entry not to include the removed one */
 582         mailbox = mlx4_alloc_cmd_mailbox(dev);
 583         if (IS_ERR(mailbox)) {
 584                 err = -ENOMEM;
 585                 back_to_list = true;
 586                 goto out_list;
 587         }
 588         mgm = mailbox->buf;
 589         members_count = 0;
 590         list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)
 591                 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
 592         mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
 593 
 594         err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);
 595         if (err)
 596                 goto out_mailbox;
 597 
 598         if (!(mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)) {
 599                 /* Remove the QP from all the steering entries */
 600                 list_for_each_entry_safe(entry, tmp_entry,
 601                                          &s_steer->steer_entries[steer],
 602                                          list) {
 603                         found = false;
 604                         list_for_each_entry(dqp, &entry->duplicates, list) {
 605                                 if (dqp->qpn == qpn) {
 606                                         found = true;
 607                                         break;
 608                                 }
 609                         }
 610                         if (found) {
 611                                 /* A duplicate, no need to change the MGM,
 612                                  * only update the duplicates list
 613                                  */
 614                                 list_del(&dqp->list);
 615                                 kfree(dqp);
 616                         } else {
 617                                 int loc = -1;
 618 
 619                                 err = mlx4_READ_ENTRY(dev,
 620                                                       entry->index,
 621                                                       mailbox);
 622                                 if (err)
 623                                         goto out_mailbox;
 624                                 members_count =
 625                                         be32_to_cpu(mgm->members_count) &
 626                                         0xffffff;
 627                                 if (!members_count) {
 628                                         mlx4_warn(dev, "QP %06x wasn't found in entry %x mcount=0. deleting entry...\n",
 629                                                   qpn, entry->index);
 630                                         list_del(&entry->list);
 631                                         kfree(entry);
 632                                         continue;
 633                                 }
 634 
 635                                 for (i = 0; i < members_count; ++i)
 636                                         if ((be32_to_cpu(mgm->qp[i]) &
 637                                              MGM_QPN_MASK) == qpn) {
 638                                                 loc = i;
 639                                                 break;
 640                                         }
 641 
 642                                 if (loc < 0) {
 643                                         mlx4_err(dev, "QP %06x wasn't found in entry %d\n",
 644                                                  qpn, entry->index);
 645                                         err = -EINVAL;
 646                                         goto out_mailbox;
 647                                 }
 648 
 649                                 /* Copy the last QP in this MGM
 650                                  * over removed QP
 651                                  */
 652                                 mgm->qp[loc] = mgm->qp[members_count - 1];
 653                                 mgm->qp[members_count - 1] = 0;
 654                                 mgm->members_count =
 655                                         cpu_to_be32(--members_count |
 656                                                     (MLX4_PROT_ETH << 30));
 657 
 658                                 err = mlx4_WRITE_ENTRY(dev,
 659                                                        entry->index,
 660                                                        mailbox);
 661                                 if (err)
 662                                         goto out_mailbox;
 663                         }
 664                 }
 665         }
 666 
 667 out_mailbox:
 668         mlx4_free_cmd_mailbox(dev, mailbox);
 669 out_list:
 670         if (back_to_list)
 671                 list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
 672         else
 673                 kfree(pqp);
 674 out_mutex:
 675         mutex_unlock(&priv->mcg_table.mutex);
 676         return err;
 677 }
 678 
 679 /*
 680  * Caller must hold MCG table semaphore.  gid and mgm parameters must
 681  * be properly aligned for command interface.
 682  *
 683  *  Returns 0 unless a firmware command error occurs.
 684  *
 685  * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
 686  * and *mgm holds MGM entry.
 687  *
 688  * if GID is found in AMGM, *index = index in AMGM, *prev = index of
 689  * previous entry in hash chain and *mgm holds AMGM entry.
 690  *
 691  * If no AMGM exists for given gid, *index = -1, *prev = index of last
 692  * entry in hash chain and *mgm holds end of hash chain.
 693  */
 694 static int find_entry(struct mlx4_dev *dev, u8 port,
 695                       u8 *gid, enum mlx4_protocol prot,
 696                       struct mlx4_cmd_mailbox *mgm_mailbox,
 697                       int *prev, int *index)
 698 {
 699         struct mlx4_cmd_mailbox *mailbox;
 700         struct mlx4_mgm *mgm = mgm_mailbox->buf;
 701         u8 *mgid;
 702         int err;
 703         u16 hash;
 704         u8 op_mod = (prot == MLX4_PROT_ETH) ?
 705                 !!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) : 0;
 706 
 707         mailbox = mlx4_alloc_cmd_mailbox(dev);
 708         if (IS_ERR(mailbox))
 709                 return -ENOMEM;
 710         mgid = mailbox->buf;
 711 
 712         memcpy(mgid, gid, 16);
 713 
 714         err = mlx4_GID_HASH(dev, mailbox, &hash, op_mod);
 715         mlx4_free_cmd_mailbox(dev, mailbox);
 716         if (err)
 717                 return err;
 718 
 719         if (0)
 720                 mlx4_dbg(dev, "Hash for %pI6 is %04x\n", gid, hash);
 721 
 722         *index = hash;
 723         *prev  = -1;
 724 
 725         do {
 726                 err = mlx4_READ_ENTRY(dev, *index, mgm_mailbox);
 727                 if (err)
 728                         return err;
 729 
 730                 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
 731                         if (*index != hash) {
 732                                 mlx4_err(dev, "Found zero MGID in AMGM\n");
 733                                 err = -EINVAL;
 734                         }
 735                         return err;
 736                 }
 737 
 738                 if (!memcmp(mgm->gid, gid, 16) &&
 739                     be32_to_cpu(mgm->members_count) >> 30 == prot)
 740                         return err;
 741 
 742                 *prev = *index;
 743                 *index = be32_to_cpu(mgm->next_gid_index) >> 6;
 744         } while (*index);
 745 
 746         *index = -1;
 747         return err;
 748 }
 749 
 750 static const u8 __promisc_mode[] = {
 751         [MLX4_FS_REGULAR]   = 0x0,
 752         [MLX4_FS_ALL_DEFAULT] = 0x1,
 753         [MLX4_FS_MC_DEFAULT] = 0x3,
 754         [MLX4_FS_MIRROR_RX_PORT] = 0x4,
 755         [MLX4_FS_MIRROR_SX_PORT] = 0x5,
 756         [MLX4_FS_UC_SNIFFER] = 0x6,
 757         [MLX4_FS_MC_SNIFFER] = 0x7,
 758 };
 759 
 760 int mlx4_map_sw_to_hw_steering_mode(struct mlx4_dev *dev,
 761                                     enum mlx4_net_trans_promisc_mode flow_type)
 762 {
 763         if (flow_type >= MLX4_FS_MODE_NUM) {
 764                 mlx4_err(dev, "Invalid flow type. type = %d\n", flow_type);
 765                 return -EINVAL;
 766         }
 767         return __promisc_mode[flow_type];
 768 }
 769 EXPORT_SYMBOL_GPL(mlx4_map_sw_to_hw_steering_mode);
 770 
 771 static void trans_rule_ctrl_to_hw(struct mlx4_net_trans_rule *ctrl,
 772                                   struct mlx4_net_trans_rule_hw_ctrl *hw)
 773 {
 774         u8 flags = 0;
 775 
 776         flags = ctrl->queue_mode == MLX4_NET_TRANS_Q_LIFO ? 1 : 0;
 777         flags |= ctrl->exclusive ? (1 << 2) : 0;
 778         flags |= ctrl->allow_loopback ? (1 << 3) : 0;
 779 
 780         hw->flags = flags;
 781         hw->type = __promisc_mode[ctrl->promisc_mode];
 782         hw->prio = cpu_to_be16(ctrl->priority);
 783         hw->port = ctrl->port;
 784         hw->qpn = cpu_to_be32(ctrl->qpn);
 785 }
 786 
 787 const u16 __sw_id_hw[] = {
 788         [MLX4_NET_TRANS_RULE_ID_ETH]     = 0xE001,
 789         [MLX4_NET_TRANS_RULE_ID_IB]      = 0xE005,
 790         [MLX4_NET_TRANS_RULE_ID_IPV6]    = 0xE003,
 791         [MLX4_NET_TRANS_RULE_ID_IPV4]    = 0xE002,
 792         [MLX4_NET_TRANS_RULE_ID_TCP]     = 0xE004,
 793         [MLX4_NET_TRANS_RULE_ID_UDP]     = 0xE006,
 794         [MLX4_NET_TRANS_RULE_ID_VXLAN]   = 0xE008
 795 };
 796 
 797 int mlx4_map_sw_to_hw_steering_id(struct mlx4_dev *dev,
 798                                   enum mlx4_net_trans_rule_id id)
 799 {
 800         if (id >= MLX4_NET_TRANS_RULE_NUM) {
 801                 mlx4_err(dev, "Invalid network rule id. id = %d\n", id);
 802                 return -EINVAL;
 803         }
 804         return __sw_id_hw[id];
 805 }
 806 EXPORT_SYMBOL_GPL(mlx4_map_sw_to_hw_steering_id);
 807 
 808 static const int __rule_hw_sz[] = {
 809         [MLX4_NET_TRANS_RULE_ID_ETH] =
 810                 sizeof(struct mlx4_net_trans_rule_hw_eth),
 811         [MLX4_NET_TRANS_RULE_ID_IB] =
 812                 sizeof(struct mlx4_net_trans_rule_hw_ib),
 813         [MLX4_NET_TRANS_RULE_ID_IPV6] = 0,
 814         [MLX4_NET_TRANS_RULE_ID_IPV4] =
 815                 sizeof(struct mlx4_net_trans_rule_hw_ipv4),
 816         [MLX4_NET_TRANS_RULE_ID_TCP] =
 817                 sizeof(struct mlx4_net_trans_rule_hw_tcp_udp),
 818         [MLX4_NET_TRANS_RULE_ID_UDP] =
 819                 sizeof(struct mlx4_net_trans_rule_hw_tcp_udp),
 820         [MLX4_NET_TRANS_RULE_ID_VXLAN] =
 821                 sizeof(struct mlx4_net_trans_rule_hw_vxlan)
 822 };
 823 
 824 int mlx4_hw_rule_sz(struct mlx4_dev *dev,
 825                enum mlx4_net_trans_rule_id id)
 826 {
 827         if (id >= MLX4_NET_TRANS_RULE_NUM) {
 828                 mlx4_err(dev, "Invalid network rule id. id = %d\n", id);
 829                 return -EINVAL;
 830         }
 831 
 832         return __rule_hw_sz[id];
 833 }
 834 EXPORT_SYMBOL_GPL(mlx4_hw_rule_sz);
 835 
 836 static int parse_trans_rule(struct mlx4_dev *dev, struct mlx4_spec_list *spec,
 837                             struct _rule_hw *rule_hw)
 838 {
 839         if (mlx4_hw_rule_sz(dev, spec->id) < 0)
 840                 return -EINVAL;
 841         memset(rule_hw, 0, mlx4_hw_rule_sz(dev, spec->id));
 842         rule_hw->id = cpu_to_be16(__sw_id_hw[spec->id]);
 843         rule_hw->size = mlx4_hw_rule_sz(dev, spec->id) >> 2;
 844 
 845         switch (spec->id) {
 846         case MLX4_NET_TRANS_RULE_ID_ETH:
 847                 memcpy(rule_hw->eth.dst_mac, spec->eth.dst_mac, ETH_ALEN);
 848                 memcpy(rule_hw->eth.dst_mac_msk, spec->eth.dst_mac_msk,
 849                        ETH_ALEN);
 850                 memcpy(rule_hw->eth.src_mac, spec->eth.src_mac, ETH_ALEN);
 851                 memcpy(rule_hw->eth.src_mac_msk, spec->eth.src_mac_msk,
 852                        ETH_ALEN);
 853                 if (spec->eth.ether_type_enable) {
 854                         rule_hw->eth.ether_type_enable = 1;
 855                         rule_hw->eth.ether_type = spec->eth.ether_type;
 856                 }
 857                 rule_hw->eth.vlan_tag = spec->eth.vlan_id;
 858                 rule_hw->eth.vlan_tag_msk = spec->eth.vlan_id_msk;
 859                 break;
 860 
 861         case MLX4_NET_TRANS_RULE_ID_IB:
 862                 rule_hw->ib.l3_qpn = spec->ib.l3_qpn;
 863                 rule_hw->ib.qpn_mask = spec->ib.qpn_msk;
 864                 memcpy(&rule_hw->ib.dst_gid, &spec->ib.dst_gid, 16);
 865                 memcpy(&rule_hw->ib.dst_gid_msk, &spec->ib.dst_gid_msk, 16);
 866                 break;
 867 
 868         case MLX4_NET_TRANS_RULE_ID_IPV6:
 869                 return -EOPNOTSUPP;
 870 
 871         case MLX4_NET_TRANS_RULE_ID_IPV4:
 872                 rule_hw->ipv4.src_ip = spec->ipv4.src_ip;
 873                 rule_hw->ipv4.src_ip_msk = spec->ipv4.src_ip_msk;
 874                 rule_hw->ipv4.dst_ip = spec->ipv4.dst_ip;
 875                 rule_hw->ipv4.dst_ip_msk = spec->ipv4.dst_ip_msk;
 876                 break;
 877 
 878         case MLX4_NET_TRANS_RULE_ID_TCP:
 879         case MLX4_NET_TRANS_RULE_ID_UDP:
 880                 rule_hw->tcp_udp.dst_port = spec->tcp_udp.dst_port;
 881                 rule_hw->tcp_udp.dst_port_msk = spec->tcp_udp.dst_port_msk;
 882                 rule_hw->tcp_udp.src_port = spec->tcp_udp.src_port;
 883                 rule_hw->tcp_udp.src_port_msk = spec->tcp_udp.src_port_msk;
 884                 break;
 885 
 886         case MLX4_NET_TRANS_RULE_ID_VXLAN:
 887                 rule_hw->vxlan.vni =
 888                         cpu_to_be32(be32_to_cpu(spec->vxlan.vni) << 8);
 889                 rule_hw->vxlan.vni_mask =
 890                         cpu_to_be32(be32_to_cpu(spec->vxlan.vni_mask) << 8);
 891                 break;
 892 
 893         default:
 894                 return -EINVAL;
 895         }
 896 
 897         return __rule_hw_sz[spec->id];
 898 }
 899 
 900 static void mlx4_err_rule(struct mlx4_dev *dev, char *str,
 901                           struct mlx4_net_trans_rule *rule)
 902 {
 903 #define BUF_SIZE 256
 904         struct mlx4_spec_list *cur;
 905         char buf[BUF_SIZE];
 906         int len = 0;
 907 
 908         mlx4_err(dev, "%s", str);
 909         len += snprintf(buf + len, BUF_SIZE - len,
 910                         "port = %d prio = 0x%x qp = 0x%x ",
 911                         rule->port, rule->priority, rule->qpn);
 912 
 913         list_for_each_entry(cur, &rule->list, list) {
 914                 switch (cur->id) {
 915                 case MLX4_NET_TRANS_RULE_ID_ETH:
 916                         len += snprintf(buf + len, BUF_SIZE - len,
 917                                         "dmac = %pM ", &cur->eth.dst_mac);
 918                         if (cur->eth.ether_type)
 919                                 len += snprintf(buf + len, BUF_SIZE - len,
 920                                                 "ethertype = 0x%x ",
 921                                                 be16_to_cpu(cur->eth.ether_type));
 922                         if (cur->eth.vlan_id)
 923                                 len += snprintf(buf + len, BUF_SIZE - len,
 924                                                 "vlan-id = %d ",
 925                                                 be16_to_cpu(cur->eth.vlan_id));
 926                         break;
 927 
 928                 case MLX4_NET_TRANS_RULE_ID_IPV4:
 929                         if (cur->ipv4.src_ip)
 930                                 len += snprintf(buf + len, BUF_SIZE - len,
 931                                                 "src-ip = %pI4 ",
 932                                                 &cur->ipv4.src_ip);
 933                         if (cur->ipv4.dst_ip)
 934                                 len += snprintf(buf + len, BUF_SIZE - len,
 935                                                 "dst-ip = %pI4 ",
 936                                                 &cur->ipv4.dst_ip);
 937                         break;
 938 
 939                 case MLX4_NET_TRANS_RULE_ID_TCP:
 940                 case MLX4_NET_TRANS_RULE_ID_UDP:
 941                         if (cur->tcp_udp.src_port)
 942                                 len += snprintf(buf + len, BUF_SIZE - len,
 943                                                 "src-port = %d ",
 944                                                 be16_to_cpu(cur->tcp_udp.src_port));
 945                         if (cur->tcp_udp.dst_port)
 946                                 len += snprintf(buf + len, BUF_SIZE - len,
 947                                                 "dst-port = %d ",
 948                                                 be16_to_cpu(cur->tcp_udp.dst_port));
 949                         break;
 950 
 951                 case MLX4_NET_TRANS_RULE_ID_IB:
 952                         len += snprintf(buf + len, BUF_SIZE - len,
 953                                         "dst-gid = %pI6\n", cur->ib.dst_gid);
 954                         len += snprintf(buf + len, BUF_SIZE - len,
 955                                         "dst-gid-mask = %pI6\n",
 956                                         cur->ib.dst_gid_msk);
 957                         break;
 958 
 959                 case MLX4_NET_TRANS_RULE_ID_VXLAN:
 960                         len += snprintf(buf + len, BUF_SIZE - len,
 961                                         "VNID = %d ", be32_to_cpu(cur->vxlan.vni));
 962                         break;
 963                 case MLX4_NET_TRANS_RULE_ID_IPV6:
 964                         break;
 965 
 966                 default:
 967                         break;
 968                 }
 969         }
 970         len += snprintf(buf + len, BUF_SIZE - len, "\n");
 971         mlx4_err(dev, "%s", buf);
 972 
 973         if (len >= BUF_SIZE)
 974                 mlx4_err(dev, "Network rule error message was truncated, print buffer is too small\n");
 975 }
 976 
 977 int mlx4_flow_attach(struct mlx4_dev *dev,
 978                      struct mlx4_net_trans_rule *rule, u64 *reg_id)
 979 {
 980         struct mlx4_cmd_mailbox *mailbox;
 981         struct mlx4_spec_list *cur;
 982         u32 size = 0;
 983         int ret;
 984 
 985         mailbox = mlx4_alloc_cmd_mailbox(dev);
 986         if (IS_ERR(mailbox))
 987                 return PTR_ERR(mailbox);
 988 
 989         if (!mlx4_qp_lookup(dev, rule->qpn)) {
 990                 mlx4_err_rule(dev, "QP doesn't exist\n", rule);
 991                 ret = -EINVAL;
 992                 goto out;
 993         }
 994 
 995         trans_rule_ctrl_to_hw(rule, mailbox->buf);
 996 
 997         size += sizeof(struct mlx4_net_trans_rule_hw_ctrl);
 998 
 999         list_for_each_entry(cur, &rule->list, list) {
1000                 ret = parse_trans_rule(dev, cur, mailbox->buf + size);
1001                 if (ret < 0)
1002                         goto out;
1003 
1004                 size += ret;
1005         }
1006 
1007         ret = mlx4_QP_FLOW_STEERING_ATTACH(dev, mailbox, size >> 2, reg_id);
1008         if (ret == -ENOMEM) {
1009                 mlx4_err_rule(dev,
1010                               "mcg table is full. Fail to register network rule\n",
1011                               rule);
1012         } else if (ret) {
1013                 if (ret == -ENXIO) {
1014                         if (dev->caps.steering_mode != MLX4_STEERING_MODE_DEVICE_MANAGED)
1015                                 mlx4_err_rule(dev,
1016                                               "DMFS is not enabled, "
1017                                               "failed to register network rule.\n",
1018                                               rule);
1019                         else
1020                                 mlx4_err_rule(dev,
1021                                               "Rule exceeds the dmfs_high_rate_mode limitations, "
1022                                               "failed to register network rule.\n",
1023                                               rule);
1024 
1025                 } else {
1026                         mlx4_err_rule(dev, "Fail to register network rule.\n", rule);
1027                 }
1028         }
1029 
1030 out:
1031         mlx4_free_cmd_mailbox(dev, mailbox);
1032 
1033         return ret;
1034 }
1035 EXPORT_SYMBOL_GPL(mlx4_flow_attach);
1036 
1037 int mlx4_flow_detach(struct mlx4_dev *dev, u64 reg_id)
1038 {
1039         int err;
1040 
1041         err = mlx4_QP_FLOW_STEERING_DETACH(dev, reg_id);
1042         if (err)
1043                 mlx4_err(dev, "Fail to detach network rule. registration id = 0x%llx\n",
1044                          reg_id);
1045         return err;
1046 }
1047 EXPORT_SYMBOL_GPL(mlx4_flow_detach);
1048 
1049 int mlx4_tunnel_steer_add(struct mlx4_dev *dev, unsigned char *addr,
1050                           int port, int qpn, u16 prio, u64 *reg_id)
1051 {
1052         int err;
1053         struct mlx4_spec_list spec_eth_outer = { {NULL} };
1054         struct mlx4_spec_list spec_vxlan     = { {NULL} };
1055         struct mlx4_spec_list spec_eth_inner = { {NULL} };
1056 
1057         struct mlx4_net_trans_rule rule = {
1058                 .queue_mode = MLX4_NET_TRANS_Q_FIFO,
1059                 .exclusive = 0,
1060                 .allow_loopback = 1,
1061                 .promisc_mode = MLX4_FS_REGULAR,
1062         };
1063 
1064         __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
1065 
1066         rule.port = port;
1067         rule.qpn = qpn;
1068         rule.priority = prio;
1069         INIT_LIST_HEAD(&rule.list);
1070 
1071         spec_eth_outer.id = MLX4_NET_TRANS_RULE_ID_ETH;
1072         memcpy(spec_eth_outer.eth.dst_mac, addr, ETH_ALEN);
1073         memcpy(spec_eth_outer.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
1074 
1075         spec_vxlan.id = MLX4_NET_TRANS_RULE_ID_VXLAN;    /* any vxlan header */
1076         spec_eth_inner.id = MLX4_NET_TRANS_RULE_ID_ETH;  /* any inner eth header */
1077 
1078         list_add_tail(&spec_eth_outer.list, &rule.list);
1079         list_add_tail(&spec_vxlan.list,     &rule.list);
1080         list_add_tail(&spec_eth_inner.list, &rule.list);
1081 
1082         err = mlx4_flow_attach(dev, &rule, reg_id);
1083         return err;
1084 }
1085 EXPORT_SYMBOL(mlx4_tunnel_steer_add);
1086 
1087 int mlx4_FLOW_STEERING_IB_UC_QP_RANGE(struct mlx4_dev *dev, u32 min_range_qpn,
1088                                       u32 max_range_qpn)
1089 {
1090         int err;
1091         u64 in_param;
1092 
1093         in_param = ((u64) min_range_qpn) << 32;
1094         in_param |= ((u64) max_range_qpn) & 0xFFFFFFFF;
1095 
1096         err = mlx4_cmd(dev, in_param, 0, 0,
1097                         MLX4_FLOW_STEERING_IB_UC_QP_RANGE,
1098                         MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
1099 
1100         return err;
1101 }
1102 EXPORT_SYMBOL_GPL(mlx4_FLOW_STEERING_IB_UC_QP_RANGE);
1103 
1104 int mlx4_qp_attach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1105                           int block_mcast_loopback, enum mlx4_protocol prot,
1106                           enum mlx4_steer_type steer)
1107 {
1108         struct mlx4_priv *priv = mlx4_priv(dev);
1109         struct mlx4_cmd_mailbox *mailbox;
1110         struct mlx4_mgm *mgm;
1111         u32 members_count;
1112         int index = -1, prev;
1113         int link = 0;
1114         int i;
1115         int err;
1116         u8 port = gid[5];
1117         u8 new_entry = 0;
1118 
1119         mailbox = mlx4_alloc_cmd_mailbox(dev);
1120         if (IS_ERR(mailbox))
1121                 return PTR_ERR(mailbox);
1122         mgm = mailbox->buf;
1123 
1124         mutex_lock(&priv->mcg_table.mutex);
1125         err = find_entry(dev, port, gid, prot,
1126                          mailbox, &prev, &index);
1127         if (err)
1128                 goto out;
1129 
1130         if (index != -1) {
1131                 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
1132                         new_entry = 1;
1133                         memcpy(mgm->gid, gid, 16);
1134                 }
1135         } else {
1136                 link = 1;
1137 
1138                 index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);
1139                 if (index == -1) {
1140                         mlx4_err(dev, "No AMGM entries left\n");
1141                         err = -ENOMEM;
1142                         goto out;
1143                 }
1144                 index += dev->caps.num_mgms;
1145 
1146                 new_entry = 1;
1147                 memset(mgm, 0, sizeof(*mgm));
1148                 memcpy(mgm->gid, gid, 16);
1149         }
1150 
1151         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
1152         if (members_count == dev->caps.num_qp_per_mgm) {
1153                 mlx4_err(dev, "MGM at index %x is full\n", index);
1154                 err = -ENOMEM;
1155                 goto out;
1156         }
1157 
1158         for (i = 0; i < members_count; ++i)
1159                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {
1160                         mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);
1161                         err = 0;
1162                         goto out;
1163                 }
1164 
1165         if (block_mcast_loopback)
1166                 mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |
1167                                                        (1U << MGM_BLCK_LB_BIT));
1168         else
1169                 mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK);
1170 
1171         mgm->members_count = cpu_to_be32(members_count | (u32) prot << 30);
1172 
1173         err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1174         if (err)
1175                 goto out;
1176 
1177         if (!link)
1178                 goto out;
1179 
1180         err = mlx4_READ_ENTRY(dev, prev, mailbox);
1181         if (err)
1182                 goto out;
1183 
1184         mgm->next_gid_index = cpu_to_be32(index << 6);
1185 
1186         err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
1187         if (err)
1188                 goto out;
1189 
1190 out:
1191         if (prot == MLX4_PROT_ETH && index != -1) {
1192                 /* manage the steering entry for promisc mode */
1193                 if (new_entry)
1194                         err = new_steering_entry(dev, port, steer,
1195                                                  index, qp->qpn);
1196                 else
1197                         err = existing_steering_entry(dev, port, steer,
1198                                                       index, qp->qpn);
1199         }
1200         if (err && link && index != -1) {
1201                 if (index < dev->caps.num_mgms)
1202                         mlx4_warn(dev, "Got AMGM index %d < %d\n",
1203                                   index, dev->caps.num_mgms);
1204                 else
1205                         mlx4_bitmap_free(&priv->mcg_table.bitmap,
1206                                          index - dev->caps.num_mgms, MLX4_USE_RR);
1207         }
1208         mutex_unlock(&priv->mcg_table.mutex);
1209 
1210         mlx4_free_cmd_mailbox(dev, mailbox);
1211         return err;
1212 }
1213 
1214 int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1215                           enum mlx4_protocol prot, enum mlx4_steer_type steer)
1216 {
1217         struct mlx4_priv *priv = mlx4_priv(dev);
1218         struct mlx4_cmd_mailbox *mailbox;
1219         struct mlx4_mgm *mgm;
1220         u32 members_count;
1221         int prev, index;
1222         int i, loc = -1;
1223         int err;
1224         u8 port = gid[5];
1225         bool removed_entry = false;
1226 
1227         mailbox = mlx4_alloc_cmd_mailbox(dev);
1228         if (IS_ERR(mailbox))
1229                 return PTR_ERR(mailbox);
1230         mgm = mailbox->buf;
1231 
1232         mutex_lock(&priv->mcg_table.mutex);
1233 
1234         err = find_entry(dev, port, gid, prot,
1235                          mailbox, &prev, &index);
1236         if (err)
1237                 goto out;
1238 
1239         if (index == -1) {
1240                 mlx4_err(dev, "MGID %pI6 not found\n", gid);
1241                 err = -EINVAL;
1242                 goto out;
1243         }
1244 
1245         /* If this QP is also a promisc QP, it shouldn't be removed only if
1246          * at least one none promisc QP is also attached to this MCG
1247          */
1248         if (prot == MLX4_PROT_ETH &&
1249             check_duplicate_entry(dev, port, steer, index, qp->qpn) &&
1250             !promisc_steering_entry(dev, port, steer, index, qp->qpn, NULL))
1251                         goto out;
1252 
1253         members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
1254         for (i = 0; i < members_count; ++i)
1255                 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {
1256                         loc = i;
1257                         break;
1258                 }
1259 
1260         if (loc == -1) {
1261                 mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);
1262                 err = -EINVAL;
1263                 goto out;
1264         }
1265 
1266         /* copy the last QP in this MGM over removed QP */
1267         mgm->qp[loc] = mgm->qp[members_count - 1];
1268         mgm->qp[members_count - 1] = 0;
1269         mgm->members_count = cpu_to_be32(--members_count | (u32) prot << 30);
1270 
1271         if (prot == MLX4_PROT_ETH)
1272                 removed_entry = can_remove_steering_entry(dev, port, steer,
1273                                                                 index, qp->qpn);
1274         if (members_count && (prot != MLX4_PROT_ETH || !removed_entry)) {
1275                 err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1276                 goto out;
1277         }
1278 
1279         /* We are going to delete the entry, members count should be 0 */
1280         mgm->members_count = cpu_to_be32((u32) prot << 30);
1281 
1282         if (prev == -1) {
1283                 /* Remove entry from MGM */
1284                 int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;
1285                 if (amgm_index) {
1286                         err = mlx4_READ_ENTRY(dev, amgm_index, mailbox);
1287                         if (err)
1288                                 goto out;
1289                 } else
1290                         memset(mgm->gid, 0, 16);
1291 
1292                 err = mlx4_WRITE_ENTRY(dev, index, mailbox);
1293                 if (err)
1294                         goto out;
1295 
1296                 if (amgm_index) {
1297                         if (amgm_index < dev->caps.num_mgms)
1298                                 mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d\n",
1299                                           index, amgm_index, dev->caps.num_mgms);
1300                         else
1301                                 mlx4_bitmap_free(&priv->mcg_table.bitmap,
1302                                                  amgm_index - dev->caps.num_mgms, MLX4_USE_RR);
1303                 }
1304         } else {
1305                 /* Remove entry from AMGM */
1306                 int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;
1307                 err = mlx4_READ_ENTRY(dev, prev, mailbox);
1308                 if (err)
1309                         goto out;
1310 
1311                 mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);
1312 
1313                 err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
1314                 if (err)
1315                         goto out;
1316 
1317                 if (index < dev->caps.num_mgms)
1318                         mlx4_warn(dev, "entry %d had next AMGM index %d < %d\n",
1319                                   prev, index, dev->caps.num_mgms);
1320                 else
1321                         mlx4_bitmap_free(&priv->mcg_table.bitmap,
1322                                          index - dev->caps.num_mgms, MLX4_USE_RR);
1323         }
1324 
1325 out:
1326         mutex_unlock(&priv->mcg_table.mutex);
1327 
1328         mlx4_free_cmd_mailbox(dev, mailbox);
1329         if (err && dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
1330                 /* In case device is under an error, return success as a closing command */
1331                 err = 0;
1332         return err;
1333 }
1334 
1335 static int mlx4_QP_ATTACH(struct mlx4_dev *dev, struct mlx4_qp *qp,
1336                           u8 gid[16], u8 attach, u8 block_loopback,
1337                           enum mlx4_protocol prot)
1338 {
1339         struct mlx4_cmd_mailbox *mailbox;
1340         int err = 0;
1341         int qpn;
1342 
1343         if (!mlx4_is_mfunc(dev))
1344                 return -EBADF;
1345 
1346         mailbox = mlx4_alloc_cmd_mailbox(dev);
1347         if (IS_ERR(mailbox))
1348                 return PTR_ERR(mailbox);
1349 
1350         memcpy(mailbox->buf, gid, 16);
1351         qpn = qp->qpn;
1352         qpn |= (prot << 28);
1353         if (attach && block_loopback)
1354                 qpn |= (1 << 31);
1355 
1356         err = mlx4_cmd(dev, mailbox->dma, qpn, attach,
1357                        MLX4_CMD_QP_ATTACH, MLX4_CMD_TIME_CLASS_A,
1358                        MLX4_CMD_WRAPPED);
1359 
1360         mlx4_free_cmd_mailbox(dev, mailbox);
1361         if (err && !attach &&
1362             dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
1363                 err = 0;
1364         return err;
1365 }
1366 
1367 int mlx4_trans_to_dmfs_attach(struct mlx4_dev *dev, struct mlx4_qp *qp,
1368                               u8 gid[16], u8 port,
1369                               int block_mcast_loopback,
1370                               enum mlx4_protocol prot, u64 *reg_id)
1371 {
1372                 struct mlx4_spec_list spec = { {NULL} };
1373                 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
1374 
1375                 struct mlx4_net_trans_rule rule = {
1376                         .queue_mode = MLX4_NET_TRANS_Q_FIFO,
1377                         .exclusive = 0,
1378                         .promisc_mode = MLX4_FS_REGULAR,
1379                         .priority = MLX4_DOMAIN_NIC,
1380                 };
1381 
1382                 rule.allow_loopback = !block_mcast_loopback;
1383                 rule.port = port;
1384                 rule.qpn = qp->qpn;
1385                 INIT_LIST_HEAD(&rule.list);
1386 
1387                 switch (prot) {
1388                 case MLX4_PROT_ETH:
1389                         spec.id = MLX4_NET_TRANS_RULE_ID_ETH;
1390                         memcpy(spec.eth.dst_mac, &gid[10], ETH_ALEN);
1391                         memcpy(spec.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
1392                         break;
1393 
1394                 case MLX4_PROT_IB_IPV6:
1395                         spec.id = MLX4_NET_TRANS_RULE_ID_IB;
1396                         memcpy(spec.ib.dst_gid, gid, 16);
1397                         memset(&spec.ib.dst_gid_msk, 0xff, 16);
1398                         break;
1399                 default:
1400                         return -EINVAL;
1401                 }
1402                 list_add_tail(&spec.list, &rule.list);
1403 
1404                 return mlx4_flow_attach(dev, &rule, reg_id);
1405 }
1406 
1407 int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1408                           u8 port, int block_mcast_loopback,
1409                           enum mlx4_protocol prot, u64 *reg_id)
1410 {
1411         switch (dev->caps.steering_mode) {
1412         case MLX4_STEERING_MODE_A0:
1413                 if (prot == MLX4_PROT_ETH)
1414                         return 0;
1415                 /* fall through */
1416 
1417         case MLX4_STEERING_MODE_B0:
1418                 if (prot == MLX4_PROT_ETH)
1419                         gid[7] |= (MLX4_MC_STEER << 1);
1420 
1421                 if (mlx4_is_mfunc(dev))
1422                         return mlx4_QP_ATTACH(dev, qp, gid, 1,
1423                                               block_mcast_loopback, prot);
1424                 return mlx4_qp_attach_common(dev, qp, gid,
1425                                              block_mcast_loopback, prot,
1426                                              MLX4_MC_STEER);
1427 
1428         case MLX4_STEERING_MODE_DEVICE_MANAGED:
1429                 return mlx4_trans_to_dmfs_attach(dev, qp, gid, port,
1430                                                  block_mcast_loopback,
1431                                                  prot, reg_id);
1432         default:
1433                 return -EINVAL;
1434         }
1435 }
1436 EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
1437 
1438 int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
1439                           enum mlx4_protocol prot, u64 reg_id)
1440 {
1441         switch (dev->caps.steering_mode) {
1442         case MLX4_STEERING_MODE_A0:
1443                 if (prot == MLX4_PROT_ETH)
1444                         return 0;
1445                 /* fall through */
1446 
1447         case MLX4_STEERING_MODE_B0:
1448                 if (prot == MLX4_PROT_ETH)
1449                         gid[7] |= (MLX4_MC_STEER << 1);
1450 
1451                 if (mlx4_is_mfunc(dev))
1452                         return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);
1453 
1454                 return mlx4_qp_detach_common(dev, qp, gid, prot,
1455                                              MLX4_MC_STEER);
1456 
1457         case MLX4_STEERING_MODE_DEVICE_MANAGED:
1458                 return mlx4_flow_detach(dev, reg_id);
1459 
1460         default:
1461                 return -EINVAL;
1462         }
1463 }
1464 EXPORT_SYMBOL_GPL(mlx4_multicast_detach);
1465 
1466 int mlx4_flow_steer_promisc_add(struct mlx4_dev *dev, u8 port,
1467                                 u32 qpn, enum mlx4_net_trans_promisc_mode mode)
1468 {
1469         struct mlx4_net_trans_rule rule = {
1470                 .queue_mode = MLX4_NET_TRANS_Q_FIFO,
1471                 .exclusive = 0,
1472                 .allow_loopback = 1,
1473         };
1474 
1475         u64 *regid_p;
1476 
1477         switch (mode) {
1478         case MLX4_FS_ALL_DEFAULT:
1479                 regid_p = &dev->regid_promisc_array[port];
1480                 break;
1481         case MLX4_FS_MC_DEFAULT:
1482                 regid_p = &dev->regid_allmulti_array[port];
1483                 break;
1484         default:
1485                 return -1;
1486         }
1487 
1488         if (*regid_p != 0)
1489                 return -1;
1490 
1491         rule.promisc_mode = mode;
1492         rule.port = port;
1493         rule.qpn = qpn;
1494         INIT_LIST_HEAD(&rule.list);
1495         mlx4_info(dev, "going promisc on %x\n", port);
1496 
1497         return  mlx4_flow_attach(dev, &rule, regid_p);
1498 }
1499 EXPORT_SYMBOL_GPL(mlx4_flow_steer_promisc_add);
1500 
1501 int mlx4_flow_steer_promisc_remove(struct mlx4_dev *dev, u8 port,
1502                                    enum mlx4_net_trans_promisc_mode mode)
1503 {
1504         int ret;
1505         u64 *regid_p;
1506 
1507         switch (mode) {
1508         case MLX4_FS_ALL_DEFAULT:
1509                 regid_p = &dev->regid_promisc_array[port];
1510                 break;
1511         case MLX4_FS_MC_DEFAULT:
1512                 regid_p = &dev->regid_allmulti_array[port];
1513                 break;
1514         default:
1515                 return -1;
1516         }
1517 
1518         if (*regid_p == 0)
1519                 return -1;
1520 
1521         ret =  mlx4_flow_detach(dev, *regid_p);
1522         if (ret == 0)
1523                 *regid_p = 0;
1524 
1525         return ret;
1526 }
1527 EXPORT_SYMBOL_GPL(mlx4_flow_steer_promisc_remove);
1528 
1529 int mlx4_unicast_attach(struct mlx4_dev *dev,
1530                         struct mlx4_qp *qp, u8 gid[16],
1531                         int block_mcast_loopback, enum mlx4_protocol prot)
1532 {
1533         if (prot == MLX4_PROT_ETH)
1534                 gid[7] |= (MLX4_UC_STEER << 1);
1535 
1536         if (mlx4_is_mfunc(dev))
1537                 return mlx4_QP_ATTACH(dev, qp, gid, 1,
1538                                         block_mcast_loopback, prot);
1539 
1540         return mlx4_qp_attach_common(dev, qp, gid, block_mcast_loopback,
1541                                         prot, MLX4_UC_STEER);
1542 }
1543 EXPORT_SYMBOL_GPL(mlx4_unicast_attach);
1544 
1545 int mlx4_unicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp,
1546                                u8 gid[16], enum mlx4_protocol prot)
1547 {
1548         if (prot == MLX4_PROT_ETH)
1549                 gid[7] |= (MLX4_UC_STEER << 1);
1550 
1551         if (mlx4_is_mfunc(dev))
1552                 return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);
1553 
1554         return mlx4_qp_detach_common(dev, qp, gid, prot, MLX4_UC_STEER);
1555 }
1556 EXPORT_SYMBOL_GPL(mlx4_unicast_detach);
1557 
1558 int mlx4_PROMISC_wrapper(struct mlx4_dev *dev, int slave,
1559                          struct mlx4_vhcr *vhcr,
1560                          struct mlx4_cmd_mailbox *inbox,
1561                          struct mlx4_cmd_mailbox *outbox,
1562                          struct mlx4_cmd_info *cmd)
1563 {
1564         u32 qpn = (u32) vhcr->in_param & 0xffffffff;
1565         int port = mlx4_slave_convert_port(dev, slave, vhcr->in_param >> 62);
1566         enum mlx4_steer_type steer = vhcr->in_modifier;
1567 
1568         if (port < 0)
1569                 return -EINVAL;
1570 
1571         /* Promiscuous unicast is not allowed in mfunc */
1572         if (mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)
1573                 return 0;
1574 
1575         if (vhcr->op_modifier)
1576                 return add_promisc_qp(dev, port, steer, qpn);
1577         else
1578                 return remove_promisc_qp(dev, port, steer, qpn);
1579 }
1580 
1581 static int mlx4_PROMISC(struct mlx4_dev *dev, u32 qpn,
1582                         enum mlx4_steer_type steer, u8 add, u8 port)
1583 {
1584         return mlx4_cmd(dev, (u64) qpn | (u64) port << 62, (u32) steer, add,
1585                         MLX4_CMD_PROMISC, MLX4_CMD_TIME_CLASS_A,
1586                         MLX4_CMD_WRAPPED);
1587 }
1588 
1589 int mlx4_multicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
1590 {
1591         if (mlx4_is_mfunc(dev))
1592                 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 1, port);
1593 
1594         return add_promisc_qp(dev, port, MLX4_MC_STEER, qpn);
1595 }
1596 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_add);
1597 
1598 int mlx4_multicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
1599 {
1600         if (mlx4_is_mfunc(dev))
1601                 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 0, port);
1602 
1603         return remove_promisc_qp(dev, port, MLX4_MC_STEER, qpn);
1604 }
1605 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_remove);
1606 
1607 int mlx4_unicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
1608 {
1609         if (mlx4_is_mfunc(dev))
1610                 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 1, port);
1611 
1612         return add_promisc_qp(dev, port, MLX4_UC_STEER, qpn);
1613 }
1614 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_add);
1615 
1616 int mlx4_unicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
1617 {
1618         if (mlx4_is_mfunc(dev))
1619                 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 0, port);
1620 
1621         return remove_promisc_qp(dev, port, MLX4_UC_STEER, qpn);
1622 }
1623 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_remove);
1624 
1625 int mlx4_init_mcg_table(struct mlx4_dev *dev)
1626 {
1627         struct mlx4_priv *priv = mlx4_priv(dev);
1628         int err;
1629 
1630         /* No need for mcg_table when fw managed the mcg table*/
1631         if (dev->caps.steering_mode ==
1632             MLX4_STEERING_MODE_DEVICE_MANAGED)
1633                 return 0;
1634         err = mlx4_bitmap_init(&priv->mcg_table.bitmap, dev->caps.num_amgms,
1635                                dev->caps.num_amgms - 1, 0, 0);
1636         if (err)
1637                 return err;
1638 
1639         mutex_init(&priv->mcg_table.mutex);
1640 
1641         return 0;
1642 }
1643 
1644 void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)
1645 {
1646         if (dev->caps.steering_mode !=
1647             MLX4_STEERING_MODE_DEVICE_MANAGED)
1648                 mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);
1649 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/mellanox/mlx4/mcg.c

DEFINITIONS
