root/drivers/net/ethernet/mellanox/mlx4/qp.c

DEFINITIONS

1. mlx4_qp_event
2. is_master_qp0
3. __mlx4_qp_modify
4. mlx4_qp_modify
5. __mlx4_qp_reserve_range
6. mlx4_qp_reserve_range
7. __mlx4_qp_release_range
8. mlx4_qp_release_range
9. __mlx4_qp_alloc_icm
10. mlx4_qp_alloc_icm
11. __mlx4_qp_free_icm
12. mlx4_qp_free_icm
13. mlx4_qp_lookup
14. mlx4_qp_alloc
15. mlx4_update_qp
16. mlx4_qp_remove
17. mlx4_qp_free
18. mlx4_CONF_SPECIAL_QP
19. mlx4_create_zones
20. mlx4_cleanup_qp_zones
21. mlx4_init_qp_table
22. mlx4_cleanup_qp_table
23. mlx4_qp_query
24. mlx4_qp_to_ready
25. mlx4_qp_roce_entropy

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
   4  * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
   5  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35 
  36 #include <linux/gfp.h>
  37 #include <linux/export.h>
  38 
  39 #include <linux/mlx4/cmd.h>
  40 #include <linux/mlx4/qp.h>
  41 
  42 #include "mlx4.h"
  43 #include "icm.h"
  44 
  45 /* QP to support BF should have bits 6,7 cleared */
  46 #define MLX4_BF_QP_SKIP_MASK    0xc0
  47 #define MLX4_MAX_BF_QP_RANGE    0x40
  48 
  49 void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
  50 {
  51         struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
  52         struct mlx4_qp *qp;
  53 
  54         spin_lock(&qp_table->lock);
  55 
  56         qp = __mlx4_qp_lookup(dev, qpn);
  57         if (qp)
  58                 refcount_inc(&qp->refcount);
  59 
  60         spin_unlock(&qp_table->lock);
  61 
  62         if (!qp) {
  63                 mlx4_dbg(dev, "Async event for none existent QP %08x\n", qpn);
  64                 return;
  65         }
  66 
  67         qp->event(qp, event_type);
  68 
  69         if (refcount_dec_and_test(&qp->refcount))
  70                 complete(&qp->free);
  71 }
  72 
  73 /* used for INIT/CLOSE port logic */
  74 static int is_master_qp0(struct mlx4_dev *dev, struct mlx4_qp *qp, int *real_qp0, int *proxy_qp0)
  75 {
  76         /* this procedure is called after we already know we are on the master */
  77         /* qp0 is either the proxy qp0, or the real qp0 */
  78         u32 pf_proxy_offset = dev->phys_caps.base_proxy_sqpn + 8 * mlx4_master_func_num(dev);
  79         *proxy_qp0 = qp->qpn >= pf_proxy_offset && qp->qpn <= pf_proxy_offset + 1;
  80 
  81         *real_qp0 = qp->qpn >= dev->phys_caps.base_sqpn &&
  82                 qp->qpn <= dev->phys_caps.base_sqpn + 1;
  83 
  84         return *real_qp0 || *proxy_qp0;
  85 }
  86 
  87 static int __mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
  88                      enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
  89                      struct mlx4_qp_context *context,
  90                      enum mlx4_qp_optpar optpar,
  91                      int sqd_event, struct mlx4_qp *qp, int native)
  92 {
  93         static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
  94                 [MLX4_QP_STATE_RST] = {
  95                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
  96                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
  97                         [MLX4_QP_STATE_INIT]    = MLX4_CMD_RST2INIT_QP,
  98                 },
  99                 [MLX4_QP_STATE_INIT]  = {
 100                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
 101                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
 102                         [MLX4_QP_STATE_INIT]    = MLX4_CMD_INIT2INIT_QP,
 103                         [MLX4_QP_STATE_RTR]     = MLX4_CMD_INIT2RTR_QP,
 104                 },
 105                 [MLX4_QP_STATE_RTR]   = {
 106                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
 107                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
 108                         [MLX4_QP_STATE_RTS]     = MLX4_CMD_RTR2RTS_QP,
 109                 },
 110                 [MLX4_QP_STATE_RTS]   = {
 111                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
 112                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
 113                         [MLX4_QP_STATE_RTS]     = MLX4_CMD_RTS2RTS_QP,
 114                         [MLX4_QP_STATE_SQD]     = MLX4_CMD_RTS2SQD_QP,
 115                 },
 116                 [MLX4_QP_STATE_SQD] = {
 117                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
 118                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
 119                         [MLX4_QP_STATE_RTS]     = MLX4_CMD_SQD2RTS_QP,
 120                         [MLX4_QP_STATE_SQD]     = MLX4_CMD_SQD2SQD_QP,
 121                 },
 122                 [MLX4_QP_STATE_SQER] = {
 123                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
 124                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
 125                         [MLX4_QP_STATE_RTS]     = MLX4_CMD_SQERR2RTS_QP,
 126                 },
 127                 [MLX4_QP_STATE_ERR] = {
 128                         [MLX4_QP_STATE_RST]     = MLX4_CMD_2RST_QP,
 129                         [MLX4_QP_STATE_ERR]     = MLX4_CMD_2ERR_QP,
 130                 }
 131         };
 132 
 133         struct mlx4_priv *priv = mlx4_priv(dev);
 134         struct mlx4_cmd_mailbox *mailbox;
 135         int ret = 0;
 136         int real_qp0 = 0;
 137         int proxy_qp0 = 0;
 138         u8 port;
 139 
 140         if (cur_state >= MLX4_QP_NUM_STATE || new_state >= MLX4_QP_NUM_STATE ||
 141             !op[cur_state][new_state])
 142                 return -EINVAL;
 143 
 144         if (op[cur_state][new_state] == MLX4_CMD_2RST_QP) {
 145                 ret = mlx4_cmd(dev, 0, qp->qpn, 2,
 146                         MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A, native);
 147                 if (mlx4_is_master(dev) && cur_state != MLX4_QP_STATE_ERR &&
 148                     cur_state != MLX4_QP_STATE_RST &&
 149                     is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) {
 150                         port = (qp->qpn & 1) + 1;
 151                         if (proxy_qp0)
 152                                 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
 153                         else
 154                                 priv->mfunc.master.qp0_state[port].qp0_active = 0;
 155                 }
 156                 return ret;
 157         }
 158 
 159         mailbox = mlx4_alloc_cmd_mailbox(dev);
 160         if (IS_ERR(mailbox))
 161                 return PTR_ERR(mailbox);
 162 
 163         if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
 164                 u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
 165                 context->mtt_base_addr_h = mtt_addr >> 32;
 166                 context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
 167                 context->log_page_size   = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
 168         }
 169 
 170         if ((cur_state == MLX4_QP_STATE_RTR) &&
 171             (new_state == MLX4_QP_STATE_RTS) &&
 172             dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2)
 173                 context->roce_entropy =
 174                         cpu_to_be16(mlx4_qp_roce_entropy(dev, qp->qpn));
 175 
 176         *(__be32 *) mailbox->buf = cpu_to_be32(optpar);
 177         memcpy(mailbox->buf + 8, context, sizeof(*context));
 178 
 179         ((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
 180                 cpu_to_be32(qp->qpn);
 181 
 182         ret = mlx4_cmd(dev, mailbox->dma,
 183                        qp->qpn | (!!sqd_event << 31),
 184                        new_state == MLX4_QP_STATE_RST ? 2 : 0,
 185                        op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C, native);
 186 
 187         if (mlx4_is_master(dev) && is_master_qp0(dev, qp, &real_qp0, &proxy_qp0)) {
 188                 port = (qp->qpn & 1) + 1;
 189                 if (cur_state != MLX4_QP_STATE_ERR &&
 190                     cur_state != MLX4_QP_STATE_RST &&
 191                     new_state == MLX4_QP_STATE_ERR) {
 192                         if (proxy_qp0)
 193                                 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 0;
 194                         else
 195                                 priv->mfunc.master.qp0_state[port].qp0_active = 0;
 196                 } else if (new_state == MLX4_QP_STATE_RTR) {
 197                         if (proxy_qp0)
 198                                 priv->mfunc.master.qp0_state[port].proxy_qp0_active = 1;
 199                         else
 200                                 priv->mfunc.master.qp0_state[port].qp0_active = 1;
 201                 }
 202         }
 203 
 204         mlx4_free_cmd_mailbox(dev, mailbox);
 205         return ret;
 206 }
 207 
 208 int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
 209                    enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
 210                    struct mlx4_qp_context *context,
 211                    enum mlx4_qp_optpar optpar,
 212                    int sqd_event, struct mlx4_qp *qp)
 213 {
 214         return __mlx4_qp_modify(dev, mtt, cur_state, new_state, context,
 215                                 optpar, sqd_event, qp, 0);
 216 }
 217 EXPORT_SYMBOL_GPL(mlx4_qp_modify);
 218 
 219 int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
 220                             int *base, u8 flags)
 221 {
 222         u32 uid;
 223         int bf_qp = !!(flags & (u8)MLX4_RESERVE_ETH_BF_QP);
 224 
 225         struct mlx4_priv *priv = mlx4_priv(dev);
 226         struct mlx4_qp_table *qp_table = &priv->qp_table;
 227 
 228         if (cnt > MLX4_MAX_BF_QP_RANGE && bf_qp)
 229                 return -ENOMEM;
 230 
 231         uid = MLX4_QP_TABLE_ZONE_GENERAL;
 232         if (flags & (u8)MLX4_RESERVE_A0_QP) {
 233                 if (bf_qp)
 234                         uid = MLX4_QP_TABLE_ZONE_RAW_ETH;
 235                 else
 236                         uid = MLX4_QP_TABLE_ZONE_RSS;
 237         }
 238 
 239         *base = mlx4_zone_alloc_entries(qp_table->zones, uid, cnt, align,
 240                                         bf_qp ? MLX4_BF_QP_SKIP_MASK : 0, NULL);
 241         if (*base == -1)
 242                 return -ENOMEM;
 243 
 244         return 0;
 245 }
 246 
 247 int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
 248                           int *base, u8 flags, u8 usage)
 249 {
 250         u32 in_modifier = RES_QP | (((u32)usage & 3) << 30);
 251         u64 in_param = 0;
 252         u64 out_param;
 253         int err;
 254 
 255         /* Turn off all unsupported QP allocation flags */
 256         flags &= dev->caps.alloc_res_qp_mask;
 257 
 258         if (mlx4_is_mfunc(dev)) {
 259                 set_param_l(&in_param, (((u32)flags) << 24) | (u32)cnt);
 260                 set_param_h(&in_param, align);
 261                 err = mlx4_cmd_imm(dev, in_param, &out_param,
 262                                    in_modifier, RES_OP_RESERVE,
 263                                    MLX4_CMD_ALLOC_RES,
 264                                    MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
 265                 if (err)
 266                         return err;
 267 
 268                 *base = get_param_l(&out_param);
 269                 return 0;
 270         }
 271         return __mlx4_qp_reserve_range(dev, cnt, align, base, flags);
 272 }
 273 EXPORT_SYMBOL_GPL(mlx4_qp_reserve_range);
 274 
 275 void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
 276 {
 277         struct mlx4_priv *priv = mlx4_priv(dev);
 278         struct mlx4_qp_table *qp_table = &priv->qp_table;
 279 
 280         if (mlx4_is_qp_reserved(dev, (u32) base_qpn))
 281                 return;
 282         mlx4_zone_free_entries_unique(qp_table->zones, base_qpn, cnt);
 283 }
 284 
 285 void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
 286 {
 287         u64 in_param = 0;
 288         int err;
 289 
 290         if (!cnt)
 291                 return;
 292 
 293         if (mlx4_is_mfunc(dev)) {
 294                 set_param_l(&in_param, base_qpn);
 295                 set_param_h(&in_param, cnt);
 296                 err = mlx4_cmd(dev, in_param, RES_QP, RES_OP_RESERVE,
 297                                MLX4_CMD_FREE_RES,
 298                                MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
 299                 if (err) {
 300                         mlx4_warn(dev, "Failed to release qp range base:%d cnt:%d\n",
 301                                   base_qpn, cnt);
 302                 }
 303         } else
 304                  __mlx4_qp_release_range(dev, base_qpn, cnt);
 305 }
 306 EXPORT_SYMBOL_GPL(mlx4_qp_release_range);
 307 
 308 int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
 309 {
 310         struct mlx4_priv *priv = mlx4_priv(dev);
 311         struct mlx4_qp_table *qp_table = &priv->qp_table;
 312         int err;
 313 
 314         err = mlx4_table_get(dev, &qp_table->qp_table, qpn);
 315         if (err)
 316                 goto err_out;
 317 
 318         err = mlx4_table_get(dev, &qp_table->auxc_table, qpn);
 319         if (err)
 320                 goto err_put_qp;
 321 
 322         err = mlx4_table_get(dev, &qp_table->altc_table, qpn);
 323         if (err)
 324                 goto err_put_auxc;
 325 
 326         err = mlx4_table_get(dev, &qp_table->rdmarc_table, qpn);
 327         if (err)
 328                 goto err_put_altc;
 329 
 330         err = mlx4_table_get(dev, &qp_table->cmpt_table, qpn);
 331         if (err)
 332                 goto err_put_rdmarc;
 333 
 334         return 0;
 335 
 336 err_put_rdmarc:
 337         mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
 338 
 339 err_put_altc:
 340         mlx4_table_put(dev, &qp_table->altc_table, qpn);
 341 
 342 err_put_auxc:
 343         mlx4_table_put(dev, &qp_table->auxc_table, qpn);
 344 
 345 err_put_qp:
 346         mlx4_table_put(dev, &qp_table->qp_table, qpn);
 347 
 348 err_out:
 349         return err;
 350 }
 351 
 352 static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
 353 {
 354         u64 param = 0;
 355 
 356         if (mlx4_is_mfunc(dev)) {
 357                 set_param_l(&param, qpn);
 358                 return mlx4_cmd_imm(dev, param, &param, RES_QP, RES_OP_MAP_ICM,
 359                                     MLX4_CMD_ALLOC_RES, MLX4_CMD_TIME_CLASS_A,
 360                                     MLX4_CMD_WRAPPED);
 361         }
 362         return __mlx4_qp_alloc_icm(dev, qpn);
 363 }
 364 
 365 void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
 366 {
 367         struct mlx4_priv *priv = mlx4_priv(dev);
 368         struct mlx4_qp_table *qp_table = &priv->qp_table;
 369 
 370         mlx4_table_put(dev, &qp_table->cmpt_table, qpn);
 371         mlx4_table_put(dev, &qp_table->rdmarc_table, qpn);
 372         mlx4_table_put(dev, &qp_table->altc_table, qpn);
 373         mlx4_table_put(dev, &qp_table->auxc_table, qpn);
 374         mlx4_table_put(dev, &qp_table->qp_table, qpn);
 375 }
 376 
 377 static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
 378 {
 379         u64 in_param = 0;
 380 
 381         if (mlx4_is_mfunc(dev)) {
 382                 set_param_l(&in_param, qpn);
 383                 if (mlx4_cmd(dev, in_param, RES_QP, RES_OP_MAP_ICM,
 384                              MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
 385                              MLX4_CMD_WRAPPED))
 386                         mlx4_warn(dev, "Failed to free icm of qp:%d\n", qpn);
 387         } else
 388                 __mlx4_qp_free_icm(dev, qpn);
 389 }
 390 
 391 struct mlx4_qp *mlx4_qp_lookup(struct mlx4_dev *dev, u32 qpn)
 392 {
 393         struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
 394         struct mlx4_qp *qp;
 395 
 396         spin_lock_irq(&qp_table->lock);
 397 
 398         qp = __mlx4_qp_lookup(dev, qpn);
 399 
 400         spin_unlock_irq(&qp_table->lock);
 401         return qp;
 402 }
 403 
 404 int mlx4_qp_alloc(struct mlx4_dev *dev, int qpn, struct mlx4_qp *qp)
 405 {
 406         struct mlx4_priv *priv = mlx4_priv(dev);
 407         struct mlx4_qp_table *qp_table = &priv->qp_table;
 408         int err;
 409 
 410         if (!qpn)
 411                 return -EINVAL;
 412 
 413         qp->qpn = qpn;
 414 
 415         err = mlx4_qp_alloc_icm(dev, qpn);
 416         if (err)
 417                 return err;
 418 
 419         spin_lock_irq(&qp_table->lock);
 420         err = radix_tree_insert(&dev->qp_table_tree, qp->qpn &
 421                                 (dev->caps.num_qps - 1), qp);
 422         spin_unlock_irq(&qp_table->lock);
 423         if (err)
 424                 goto err_icm;
 425 
 426         refcount_set(&qp->refcount, 1);
 427         init_completion(&qp->free);
 428 
 429         return 0;
 430 
 431 err_icm:
 432         mlx4_qp_free_icm(dev, qpn);
 433         return err;
 434 }
 435 
 436 EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
 437 
 438 int mlx4_update_qp(struct mlx4_dev *dev, u32 qpn,
 439                    enum mlx4_update_qp_attr attr,
 440                    struct mlx4_update_qp_params *params)
 441 {
 442         struct mlx4_cmd_mailbox *mailbox;
 443         struct mlx4_update_qp_context *cmd;
 444         u64 pri_addr_path_mask = 0;
 445         u64 qp_mask = 0;
 446         int err = 0;
 447 
 448         if (!attr || (attr & ~MLX4_UPDATE_QP_SUPPORTED_ATTRS))
 449                 return -EINVAL;
 450 
 451         mailbox = mlx4_alloc_cmd_mailbox(dev);
 452         if (IS_ERR(mailbox))
 453                 return PTR_ERR(mailbox);
 454 
 455         cmd = (struct mlx4_update_qp_context *)mailbox->buf;
 456 
 457         if (attr & MLX4_UPDATE_QP_SMAC) {
 458                 pri_addr_path_mask |= 1ULL << MLX4_UPD_QP_PATH_MASK_MAC_INDEX;
 459                 cmd->qp_context.pri_path.grh_mylmc = params->smac_index;
 460         }
 461 
 462         if (attr & MLX4_UPDATE_QP_ETH_SRC_CHECK_MC_LB) {
 463                 if (!(dev->caps.flags2
 464                       & MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB)) {
 465                         mlx4_warn(dev,
 466                                   "Trying to set src check LB, but it isn't supported\n");
 467                         err = -EOPNOTSUPP;
 468                         goto out;
 469                 }
 470                 pri_addr_path_mask |=
 471                         1ULL << MLX4_UPD_QP_PATH_MASK_ETH_SRC_CHECK_MC_LB;
 472                 if (params->flags &
 473                     MLX4_UPDATE_QP_PARAMS_FLAGS_ETH_CHECK_MC_LB) {
 474                         cmd->qp_context.pri_path.fl |=
 475                                 MLX4_FL_ETH_SRC_CHECK_MC_LB;
 476                 }
 477         }
 478 
 479         if (attr & MLX4_UPDATE_QP_VSD) {
 480                 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_VSD;
 481                 if (params->flags & MLX4_UPDATE_QP_PARAMS_FLAGS_VSD_ENABLE)
 482                         cmd->qp_context.param3 |= cpu_to_be32(MLX4_STRIP_VLAN);
 483         }
 484 
 485         if (attr & MLX4_UPDATE_QP_RATE_LIMIT) {
 486                 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_RATE_LIMIT;
 487                 cmd->qp_context.rate_limit_params = cpu_to_be16((params->rate_unit << 14) | params->rate_val);
 488         }
 489 
 490         if (attr & MLX4_UPDATE_QP_QOS_VPORT) {
 491                 if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QOS_VPP)) {
 492                         mlx4_warn(dev, "Granular QoS per VF is not enabled\n");
 493                         err = -EOPNOTSUPP;
 494                         goto out;
 495                 }
 496 
 497                 qp_mask |= 1ULL << MLX4_UPD_QP_MASK_QOS_VPP;
 498                 cmd->qp_context.qos_vport = params->qos_vport;
 499         }
 500 
 501         cmd->primary_addr_path_mask = cpu_to_be64(pri_addr_path_mask);
 502         cmd->qp_mask = cpu_to_be64(qp_mask);
 503 
 504         err = mlx4_cmd(dev, mailbox->dma, qpn & 0xffffff, 0,
 505                        MLX4_CMD_UPDATE_QP, MLX4_CMD_TIME_CLASS_A,
 506                        MLX4_CMD_NATIVE);
 507 out:
 508         mlx4_free_cmd_mailbox(dev, mailbox);
 509         return err;
 510 }
 511 EXPORT_SYMBOL_GPL(mlx4_update_qp);
 512 
 513 void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
 514 {
 515         struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
 516         unsigned long flags;
 517 
 518         spin_lock_irqsave(&qp_table->lock, flags);
 519         radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
 520         spin_unlock_irqrestore(&qp_table->lock, flags);
 521 }
 522 EXPORT_SYMBOL_GPL(mlx4_qp_remove);
 523 
 524 void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
 525 {
 526         if (refcount_dec_and_test(&qp->refcount))
 527                 complete(&qp->free);
 528         wait_for_completion(&qp->free);
 529 
 530         mlx4_qp_free_icm(dev, qp->qpn);
 531 }
 532 EXPORT_SYMBOL_GPL(mlx4_qp_free);
 533 
 534 static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
 535 {
 536         return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
 537                         MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
 538 }
 539 
 540 #define MLX4_QP_TABLE_RSS_ETH_PRIORITY 2
 541 #define MLX4_QP_TABLE_RAW_ETH_PRIORITY 1
 542 #define MLX4_QP_TABLE_RAW_ETH_SIZE     256
 543 
 544 static int mlx4_create_zones(struct mlx4_dev *dev,
 545                              u32 reserved_bottom_general,
 546                              u32 reserved_top_general,
 547                              u32 reserved_bottom_rss,
 548                              u32 start_offset_rss,
 549                              u32 max_table_offset)
 550 {
 551         struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
 552         struct mlx4_bitmap (*bitmap)[MLX4_QP_TABLE_ZONE_NUM] = NULL;
 553         int bitmap_initialized = 0;
 554         u32 last_offset;
 555         int k;
 556         int err;
 557 
 558         qp_table->zones = mlx4_zone_allocator_create(MLX4_ZONE_ALLOC_FLAGS_NO_OVERLAP);
 559 
 560         if (NULL == qp_table->zones)
 561                 return -ENOMEM;
 562 
 563         bitmap = kmalloc(sizeof(*bitmap), GFP_KERNEL);
 564 
 565         if (NULL == bitmap) {
 566                 err = -ENOMEM;
 567                 goto free_zone;
 568         }
 569 
 570         err = mlx4_bitmap_init(*bitmap + MLX4_QP_TABLE_ZONE_GENERAL, dev->caps.num_qps,
 571                                (1 << 23) - 1, reserved_bottom_general,
 572                                reserved_top_general);
 573 
 574         if (err)
 575                 goto free_bitmap;
 576 
 577         ++bitmap_initialized;
 578 
 579         err = mlx4_zone_add_one(qp_table->zones, *bitmap + MLX4_QP_TABLE_ZONE_GENERAL,
 580                                 MLX4_ZONE_FALLBACK_TO_HIGHER_PRIO |
 581                                 MLX4_ZONE_USE_RR, 0,
 582                                 0, qp_table->zones_uids + MLX4_QP_TABLE_ZONE_GENERAL);
 583 
 584         if (err)
 585                 goto free_bitmap;
 586 
 587         err = mlx4_bitmap_init(*bitmap + MLX4_QP_TABLE_ZONE_RSS,
 588                                reserved_bottom_rss,
 589                                reserved_bottom_rss - 1,
 590                                dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
 591                                reserved_bottom_rss - start_offset_rss);
 592 
 593         if (err)
 594                 goto free_bitmap;
 595 
 596         ++bitmap_initialized;
 597 
 598         err = mlx4_zone_add_one(qp_table->zones, *bitmap + MLX4_QP_TABLE_ZONE_RSS,
 599                                 MLX4_ZONE_ALLOW_ALLOC_FROM_LOWER_PRIO |
 600                                 MLX4_ZONE_ALLOW_ALLOC_FROM_EQ_PRIO |
 601                                 MLX4_ZONE_USE_RR, MLX4_QP_TABLE_RSS_ETH_PRIORITY,
 602                                 0, qp_table->zones_uids + MLX4_QP_TABLE_ZONE_RSS);
 603 
 604         if (err)
 605                 goto free_bitmap;
 606 
 607         last_offset = dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
 608         /*  We have a single zone for the A0 steering QPs area of the FW. This area
 609          *  needs to be split into subareas. One set of subareas is for RSS QPs
 610          *  (in which qp number bits 6 and/or 7 are set); the other set of subareas
 611          *  is for RAW_ETH QPs, which require that both bits 6 and 7 are zero.
 612          *  Currently, the values returned by the FW (A0 steering area starting qp number
 613          *  and A0 steering area size) are such that there are only two subareas -- one
 614          *  for RSS and one for RAW_ETH.
 615          */
 616         for (k = MLX4_QP_TABLE_ZONE_RSS + 1; k < sizeof(*bitmap)/sizeof((*bitmap)[0]);
 617              k++) {
 618                 int size;
 619                 u32 offset = start_offset_rss;
 620                 u32 bf_mask;
 621                 u32 requested_size;
 622 
 623                 /* Assuming MLX4_BF_QP_SKIP_MASK is consecutive ones, this calculates
 624                  * a mask of all LSB bits set until (and not including) the first
 625                  * set bit of  MLX4_BF_QP_SKIP_MASK. For example, if MLX4_BF_QP_SKIP_MASK
 626                  * is 0xc0, bf_mask will be 0x3f.
 627                  */
 628                 bf_mask = (MLX4_BF_QP_SKIP_MASK & ~(MLX4_BF_QP_SKIP_MASK - 1)) - 1;
 629                 requested_size = min((u32)MLX4_QP_TABLE_RAW_ETH_SIZE, bf_mask + 1);
 630 
 631                 if (((last_offset & MLX4_BF_QP_SKIP_MASK) &&
 632                      ((int)(max_table_offset - last_offset)) >=
 633                      roundup_pow_of_two(MLX4_BF_QP_SKIP_MASK)) ||
 634                     (!(last_offset & MLX4_BF_QP_SKIP_MASK) &&
 635                      !((last_offset + requested_size - 1) &
 636                        MLX4_BF_QP_SKIP_MASK)))
 637                         size = requested_size;
 638                 else {
 639                         u32 candidate_offset =
 640                                 (last_offset | MLX4_BF_QP_SKIP_MASK | bf_mask) + 1;
 641 
 642                         if (last_offset & MLX4_BF_QP_SKIP_MASK)
 643                                 last_offset = candidate_offset;
 644 
 645                         /* From this point, the BF bits are 0 */
 646 
 647                         if (last_offset > max_table_offset) {
 648                                 /* need to skip */
 649                                 size = -1;
 650                         } else {
 651                                 size = min3(max_table_offset - last_offset,
 652                                             bf_mask - (last_offset & bf_mask),
 653                                             requested_size);
 654                                 if (size < requested_size) {
 655                                         int candidate_size;
 656 
 657                                         candidate_size = min3(
 658                                                 max_table_offset - candidate_offset,
 659                                                 bf_mask - (last_offset & bf_mask),
 660                                                 requested_size);
 661 
 662                                         /*  We will not take this path if last_offset was
 663                                          *  already set above to candidate_offset
 664                                          */
 665                                         if (candidate_size > size) {
 666                                                 last_offset = candidate_offset;
 667                                                 size = candidate_size;
 668                                         }
 669                                 }
 670                         }
 671                 }
 672 
 673                 if (size > 0) {
 674                         /* mlx4_bitmap_alloc_range will find a contiguous range of "size"
 675                          * QPs in which both bits 6 and 7 are zero, because we pass it the
 676                          * MLX4_BF_SKIP_MASK).
 677                          */
 678                         offset = mlx4_bitmap_alloc_range(
 679                                         *bitmap + MLX4_QP_TABLE_ZONE_RSS,
 680                                         size, 1,
 681                                         MLX4_BF_QP_SKIP_MASK);
 682 
 683                         if (offset == (u32)-1) {
 684                                 err = -ENOMEM;
 685                                 break;
 686                         }
 687 
 688                         last_offset = offset + size;
 689 
 690                         err = mlx4_bitmap_init(*bitmap + k, roundup_pow_of_two(size),
 691                                                roundup_pow_of_two(size) - 1, 0,
 692                                                roundup_pow_of_two(size) - size);
 693                 } else {
 694                         /* Add an empty bitmap, we'll allocate from different zones (since
 695                          * at least one is reserved)
 696                          */
 697                         err = mlx4_bitmap_init(*bitmap + k, 1,
 698                                                MLX4_QP_TABLE_RAW_ETH_SIZE - 1, 0,
 699                                                0);
 700                         mlx4_bitmap_alloc_range(*bitmap + k, 1, 1, 0);
 701                 }
 702 
 703                 if (err)
 704                         break;
 705 
 706                 ++bitmap_initialized;
 707 
 708                 err = mlx4_zone_add_one(qp_table->zones, *bitmap + k,
 709                                         MLX4_ZONE_ALLOW_ALLOC_FROM_LOWER_PRIO |
 710                                         MLX4_ZONE_ALLOW_ALLOC_FROM_EQ_PRIO |
 711                                         MLX4_ZONE_USE_RR, MLX4_QP_TABLE_RAW_ETH_PRIORITY,
 712                                         offset, qp_table->zones_uids + k);
 713 
 714                 if (err)
 715                         break;
 716         }
 717 
 718         if (err)
 719                 goto free_bitmap;
 720 
 721         qp_table->bitmap_gen = *bitmap;
 722 
 723         return err;
 724 
 725 free_bitmap:
 726         for (k = 0; k < bitmap_initialized; k++)
 727                 mlx4_bitmap_cleanup(*bitmap + k);
 728         kfree(bitmap);
 729 free_zone:
 730         mlx4_zone_allocator_destroy(qp_table->zones);
 731         return err;
 732 }
 733 
 734 static void mlx4_cleanup_qp_zones(struct mlx4_dev *dev)
 735 {
 736         struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
 737 
 738         if (qp_table->zones) {
 739                 int i;
 740 
 741                 for (i = 0;
 742                      i < sizeof(qp_table->zones_uids)/sizeof(qp_table->zones_uids[0]);
 743                      i++) {
 744                         struct mlx4_bitmap *bitmap =
 745                                 mlx4_zone_get_bitmap(qp_table->zones,
 746                                                      qp_table->zones_uids[i]);
 747 
 748                         mlx4_zone_remove_one(qp_table->zones, qp_table->zones_uids[i]);
 749                         if (NULL == bitmap)
 750                                 continue;
 751 
 752                         mlx4_bitmap_cleanup(bitmap);
 753                 }
 754                 mlx4_zone_allocator_destroy(qp_table->zones);
 755                 kfree(qp_table->bitmap_gen);
 756                 qp_table->bitmap_gen = NULL;
 757                 qp_table->zones = NULL;
 758         }
 759 }
 760 
 761 int mlx4_init_qp_table(struct mlx4_dev *dev)
 762 {
 763         struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
 764         int err;
 765         int reserved_from_top = 0;
 766         int reserved_from_bot;
 767         int k;
 768         int fixed_reserved_from_bot_rv = 0;
 769         int bottom_reserved_for_rss_bitmap;
 770         u32 max_table_offset = dev->caps.dmfs_high_rate_qpn_base +
 771                         dev->caps.dmfs_high_rate_qpn_range;
 772 
 773         spin_lock_init(&qp_table->lock);
 774         INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
 775         if (mlx4_is_slave(dev))
 776                 return 0;
 777 
 778         /* We reserve 2 extra QPs per port for the special QPs.  The
 779          * block of special QPs must be aligned to a multiple of 8, so
 780          * round up.
 781          *
 782          * We also reserve the MSB of the 24-bit QP number to indicate
 783          * that a QP is an XRC QP.
 784          */
 785         for (k = 0; k <= MLX4_QP_REGION_BOTTOM; k++)
 786                 fixed_reserved_from_bot_rv += dev->caps.reserved_qps_cnt[k];
 787 
 788         if (fixed_reserved_from_bot_rv < max_table_offset)
 789                 fixed_reserved_from_bot_rv = max_table_offset;
 790 
 791         /* We reserve at least 1 extra for bitmaps that we don't have enough space for*/
 792         bottom_reserved_for_rss_bitmap =
 793                 roundup_pow_of_two(fixed_reserved_from_bot_rv + 1);
 794         dev->phys_caps.base_sqpn = ALIGN(bottom_reserved_for_rss_bitmap, 8);
 795 
 796         {
 797                 int sort[MLX4_NUM_QP_REGION];
 798                 int i, j;
 799                 int last_base = dev->caps.num_qps;
 800 
 801                 for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
 802                         sort[i] = i;
 803 
 804                 for (i = MLX4_NUM_QP_REGION; i > MLX4_QP_REGION_BOTTOM; --i) {
 805                         for (j = MLX4_QP_REGION_BOTTOM + 2; j < i; ++j) {
 806                                 if (dev->caps.reserved_qps_cnt[sort[j]] >
 807                                     dev->caps.reserved_qps_cnt[sort[j - 1]])
 808                                         swap(sort[j], sort[j - 1]);
 809                         }
 810                 }
 811 
 812                 for (i = MLX4_QP_REGION_BOTTOM + 1; i < MLX4_NUM_QP_REGION; ++i) {
 813                         last_base -= dev->caps.reserved_qps_cnt[sort[i]];
 814                         dev->caps.reserved_qps_base[sort[i]] = last_base;
 815                         reserved_from_top +=
 816                                 dev->caps.reserved_qps_cnt[sort[i]];
 817                 }
 818         }
 819 
 820        /* Reserve 8 real SQPs in both native and SRIOV modes.
 821         * In addition, in SRIOV mode, reserve 8 proxy SQPs per function
 822         * (for all PFs and VFs), and 8 corresponding tunnel QPs.
 823         * Each proxy SQP works opposite its own tunnel QP.
 824         *
 825         * The QPs are arranged as follows:
 826         * a. 8 real SQPs
 827         * b. All the proxy SQPs (8 per function)
 828         * c. All the tunnel QPs (8 per function)
 829         */
 830         reserved_from_bot = mlx4_num_reserved_sqps(dev);
 831         if (reserved_from_bot + reserved_from_top > dev->caps.num_qps) {
 832                 mlx4_err(dev, "Number of reserved QPs is higher than number of QPs\n");
 833                 return -EINVAL;
 834         }
 835 
 836         err = mlx4_create_zones(dev, reserved_from_bot, reserved_from_bot,
 837                                 bottom_reserved_for_rss_bitmap,
 838                                 fixed_reserved_from_bot_rv,
 839                                 max_table_offset);
 840 
 841         if (err)
 842                 return err;
 843 
 844         if (mlx4_is_mfunc(dev)) {
 845                 /* for PPF use */
 846                 dev->phys_caps.base_proxy_sqpn = dev->phys_caps.base_sqpn + 8;
 847                 dev->phys_caps.base_tunnel_sqpn = dev->phys_caps.base_sqpn + 8 + 8 * MLX4_MFUNC_MAX;
 848 
 849                 /* In mfunc, calculate proxy and tunnel qp offsets for the PF here,
 850                  * since the PF does not call mlx4_slave_caps */
 851                 dev->caps.spec_qps = kcalloc(dev->caps.num_ports,
 852                                              sizeof(*dev->caps.spec_qps),
 853                                              GFP_KERNEL);
 854                 if (!dev->caps.spec_qps) {
 855                         err = -ENOMEM;
 856                         goto err_mem;
 857                 }
 858 
 859                 for (k = 0; k < dev->caps.num_ports; k++) {
 860                         dev->caps.spec_qps[k].qp0_proxy = dev->phys_caps.base_proxy_sqpn +
 861                                 8 * mlx4_master_func_num(dev) + k;
 862                         dev->caps.spec_qps[k].qp0_tunnel = dev->caps.spec_qps[k].qp0_proxy + 8 * MLX4_MFUNC_MAX;
 863                         dev->caps.spec_qps[k].qp1_proxy = dev->phys_caps.base_proxy_sqpn +
 864                                 8 * mlx4_master_func_num(dev) + MLX4_MAX_PORTS + k;
 865                         dev->caps.spec_qps[k].qp1_tunnel = dev->caps.spec_qps[k].qp1_proxy + 8 * MLX4_MFUNC_MAX;
 866                 }
 867         }
 868 
 869 
 870         err = mlx4_CONF_SPECIAL_QP(dev, dev->phys_caps.base_sqpn);
 871         if (err)
 872                 goto err_mem;
 873 
 874         return err;
 875 
 876 err_mem:
 877         kfree(dev->caps.spec_qps);
 878         dev->caps.spec_qps = NULL;
 879         mlx4_cleanup_qp_zones(dev);
 880         return err;
 881 }
 882 
 883 void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
 884 {
 885         if (mlx4_is_slave(dev))
 886                 return;
 887 
 888         mlx4_CONF_SPECIAL_QP(dev, 0);
 889 
 890         mlx4_cleanup_qp_zones(dev);
 891 }
 892 
 893 int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
 894                   struct mlx4_qp_context *context)
 895 {
 896         struct mlx4_cmd_mailbox *mailbox;
 897         int err;
 898 
 899         mailbox = mlx4_alloc_cmd_mailbox(dev);
 900         if (IS_ERR(mailbox))
 901                 return PTR_ERR(mailbox);
 902 
 903         err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0,
 904                            MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A,
 905                            MLX4_CMD_WRAPPED);
 906         if (!err)
 907                 memcpy(context, mailbox->buf + 8, sizeof(*context));
 908 
 909         mlx4_free_cmd_mailbox(dev, mailbox);
 910         return err;
 911 }
 912 EXPORT_SYMBOL_GPL(mlx4_qp_query);
 913 
 914 int mlx4_qp_to_ready(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
 915                      struct mlx4_qp_context *context,
 916                      struct mlx4_qp *qp, enum mlx4_qp_state *qp_state)
 917 {
 918         int err;
 919         int i;
 920         enum mlx4_qp_state states[] = {
 921                 MLX4_QP_STATE_RST,
 922                 MLX4_QP_STATE_INIT,
 923                 MLX4_QP_STATE_RTR,
 924                 MLX4_QP_STATE_RTS
 925         };
 926 
 927         for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
 928                 context->flags &= cpu_to_be32(~(0xf << 28));
 929                 context->flags |= cpu_to_be32(states[i + 1] << 28);
 930                 if (states[i + 1] != MLX4_QP_STATE_RTR)
 931                         context->params2 &= ~cpu_to_be32(MLX4_QP_BIT_FPP);
 932                 err = mlx4_qp_modify(dev, mtt, states[i], states[i + 1],
 933                                      context, 0, 0, qp);
 934                 if (err) {
 935                         mlx4_err(dev, "Failed to bring QP to state: %d with error: %d\n",
 936                                  states[i + 1], err);
 937                         return err;
 938                 }
 939 
 940                 *qp_state = states[i + 1];
 941         }
 942 
 943         return 0;
 944 }
 945 EXPORT_SYMBOL_GPL(mlx4_qp_to_ready);
 946 
 947 u16 mlx4_qp_roce_entropy(struct mlx4_dev *dev, u32 qpn)
 948 {
 949         struct mlx4_qp_context context;
 950         struct mlx4_qp qp;
 951         int err;
 952 
 953         qp.qpn = qpn;
 954         err = mlx4_qp_query(dev, &qp, &context);
 955         if (!err) {
 956                 u32 dest_qpn = be32_to_cpu(context.remote_qpn) & 0xffffff;
 957                 u16 folded_dst = folded_qp(dest_qpn);
 958                 u16 folded_src = folded_qp(qpn);
 959 
 960                 return (dest_qpn != qpn) ?
 961                         ((folded_dst ^ folded_src) | 0xC000) :
 962                         folded_src | 0xC000;
 963         }
 964         return 0xdead;
 965 }