drivers/infiniband/hw/mlx4/cq.c

   1 /*
   2  * Copyright (c) 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/mlx4/cq.h>
  35 #include <linux/mlx4/qp.h>
  36 #include <linux/mlx4/srq.h>
  37 #include <linux/slab.h>
  38
  39 #include "mlx4_ib.h"
  40 #include <rdma/mlx4-abi.h>
  41
  42 static void mlx4_ib_cq_comp(struct mlx4_cq *cq)
  43 {
  44         struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
  45         ibcq->comp_handler(ibcq, ibcq->cq_context);
  46 }
  47
  48 static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
  49 {
  50         struct ib_event event;
  51         struct ib_cq *ibcq;
  52
  53         if (type != MLX4_EVENT_TYPE_CQ_ERROR) {
  54                 pr_warn("Unexpected event type %d "
  55                        "on CQ %06x\n", type, cq->cqn);
  56                 return;
  57         }
  58
  59         ibcq = &to_mibcq(cq)->ibcq;
  60         if (ibcq->event_handler) {
  61                 event.device     = ibcq->device;
  62                 event.event      = IB_EVENT_CQ_ERR;
  63                 event.element.cq = ibcq;
  64                 ibcq->event_handler(&event, ibcq->cq_context);
  65         }
  66 }
  67
  68 static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
  69 {
  70         return mlx4_buf_offset(&buf->buf, n * buf->entry_size);
  71 }
  72
  73 static void *get_cqe(struct mlx4_ib_cq *cq, int n)
  74 {
  75         return get_cqe_from_buf(&cq->buf, n);
  76 }
  77
  78 static void *get_sw_cqe(struct mlx4_ib_cq *cq, int n)
  79 {
  80         struct mlx4_cqe *cqe = get_cqe(cq, n & cq->ibcq.cqe);
  81         struct mlx4_cqe *tcqe = ((cq->buf.entry_size == 64) ? (cqe + 1) : cqe);
  82
  83         return (!!(tcqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK) ^
  84                 !!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe;
  85 }
  86
  87 static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq)
  88 {
  89         return get_sw_cqe(cq, cq->mcq.cons_index);
  90 }
  91
  92 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
  93 {
  94         struct mlx4_ib_cq *mcq = to_mcq(cq);
  95         struct mlx4_ib_dev *dev = to_mdev(cq->device);
  96
  97         return mlx4_cq_modify(dev->dev, &mcq->mcq, cq_count, cq_period);
  98 }
  99
 100 static int mlx4_ib_alloc_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int nent)
 101 {
 102         int err;
 103
 104         err = mlx4_buf_alloc(dev->dev, nent * dev->dev->caps.cqe_size,
 105                              PAGE_SIZE * 2, &buf->buf);
 106
 107         if (err)
 108                 goto out;
 109
 110         buf->entry_size = dev->dev->caps.cqe_size;
 111         err = mlx4_mtt_init(dev->dev, buf->buf.npages, buf->buf.page_shift,
 112                                     &buf->mtt);
 113         if (err)
 114                 goto err_buf;
 115
 116         err = mlx4_buf_write_mtt(dev->dev, &buf->mtt, &buf->buf);
 117         if (err)
 118                 goto err_mtt;
 119
 120         return 0;
 121
 122 err_mtt:
 123         mlx4_mtt_cleanup(dev->dev, &buf->mtt);
 124
 125 err_buf:
 126         mlx4_buf_free(dev->dev, nent * buf->entry_size, &buf->buf);
 127
 128 out:
 129         return err;
 130 }
 131
 132 static void mlx4_ib_free_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int cqe)
 133 {
 134         mlx4_buf_free(dev->dev, (cqe + 1) * buf->entry_size, &buf->buf);
 135 }
 136
 137 static int mlx4_ib_get_cq_umem(struct mlx4_ib_dev *dev, struct ib_ucontext *context,
 138                                struct mlx4_ib_cq_buf *buf, struct ib_umem **umem,
 139                                u64 buf_addr, int cqe)
 140 {
 141         int err;
 142         int cqe_size = dev->dev->caps.cqe_size;
 143         int shift;
 144         int n;
 145
 146         *umem = ib_umem_get(context, buf_addr, cqe * cqe_size,
 147                             IB_ACCESS_LOCAL_WRITE, 1);
 148         if (IS_ERR(*umem))
 149                 return PTR_ERR(*umem);
 150
 151         n = ib_umem_page_count(*umem);
 152         shift = mlx4_ib_umem_calc_optimal_mtt_size(*umem, 0, &n);
 153         err = mlx4_mtt_init(dev->dev, n, shift, &buf->mtt);
 154
 155         if (err)
 156                 goto err_buf;
 157
 158         err = mlx4_ib_umem_write_mtt(dev, &buf->mtt, *umem);
 159         if (err)
 160                 goto err_mtt;
 161
 162         return 0;
 163
 164 err_mtt:
 165         mlx4_mtt_cleanup(dev->dev, &buf->mtt);
 166
 167 err_buf:
 168         ib_umem_release(*umem);
 169
 170         return err;
 171 }
 172
 173 #define CQ_CREATE_FLAGS_SUPPORTED IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION
 174 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev,
 175                                 const struct ib_cq_init_attr *attr,
 176                                 struct ib_ucontext *context,
 177                                 struct ib_udata *udata)
 178 {
 179         int entries = attr->cqe;
 180         int vector = attr->comp_vector;
 181         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 182         struct mlx4_ib_cq *cq;
 183         struct mlx4_uar *uar;
 184         int err;
 185
 186         if (entries < 1 || entries > dev->dev->caps.max_cqes)
 187                 return ERR_PTR(-EINVAL);
 188
 189         if (attr->flags & ~CQ_CREATE_FLAGS_SUPPORTED)
 190                 return ERR_PTR(-EINVAL);
 191
 192         cq = kmalloc(sizeof *cq, GFP_KERNEL);
 193         if (!cq)
 194                 return ERR_PTR(-ENOMEM);
 195
 196         entries      = roundup_pow_of_two(entries + 1);
 197         cq->ibcq.cqe = entries - 1;
 198         mutex_init(&cq->resize_mutex);
 199         spin_lock_init(&cq->lock);
 200         cq->resize_buf = NULL;
 201         cq->resize_umem = NULL;
 202         cq->create_flags = attr->flags;
 203         INIT_LIST_HEAD(&cq->send_qp_list);
 204         INIT_LIST_HEAD(&cq->recv_qp_list);
 205
 206         if (context) {
 207                 struct mlx4_ib_create_cq ucmd;
 208
 209                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 210                         err = -EFAULT;
 211                         goto err_cq;
 212                 }
 213
 214                 err = mlx4_ib_get_cq_umem(dev, context, &cq->buf, &cq->umem,
 215                                           ucmd.buf_addr, entries);
 216                 if (err)
 217                         goto err_cq;
 218
 219                 err = mlx4_ib_db_map_user(to_mucontext(context), ucmd.db_addr,
 220                                           &cq->db);
 221                 if (err)
 222                         goto err_mtt;
 223
 224                 uar = &to_mucontext(context)->uar;
 225                 cq->mcq.usage = MLX4_RES_USAGE_USER_VERBS;
 226         } else {
 227                 err = mlx4_db_alloc(dev->dev, &cq->db, 1);
 228                 if (err)
 229                         goto err_cq;
 230
 231                 cq->mcq.set_ci_db  = cq->db.db;
 232                 cq->mcq.arm_db     = cq->db.db + 1;
 233                 *cq->mcq.set_ci_db = 0;
 234                 *cq->mcq.arm_db    = 0;
 235
 236                 err = mlx4_ib_alloc_cq_buf(dev, &cq->buf, entries);
 237                 if (err)
 238                         goto err_db;
 239
 240                 uar = &dev->priv_uar;
 241                 cq->mcq.usage = MLX4_RES_USAGE_DRIVER;
 242         }
 243
 244         if (dev->eq_table)
 245                 vector = dev->eq_table[vector % ibdev->num_comp_vectors];
 246
 247         err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar,
 248                             cq->db.dma, &cq->mcq, vector, 0,
 249                             !!(cq->create_flags & IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION));
 250         if (err)
 251                 goto err_dbmap;
 252
 253         if (context)
 254                 cq->mcq.tasklet_ctx.comp = mlx4_ib_cq_comp;
 255         else
 256                 cq->mcq.comp = mlx4_ib_cq_comp;
 257         cq->mcq.event = mlx4_ib_cq_event;
 258
 259         if (context)
 260                 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) {
 261                         err = -EFAULT;
 262                         goto err_cq_free;
 263                 }
 264
 265         return &cq->ibcq;
 266
 267 err_cq_free:
 268         mlx4_cq_free(dev->dev, &cq->mcq);
 269
 270 err_dbmap:
 271         if (context)
 272                 mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db);
 273
 274 err_mtt:
 275         mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
 276
 277         if (context)
 278                 ib_umem_release(cq->umem);
 279         else
 280                 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
 281
 282 err_db:
 283         if (!context)
 284                 mlx4_db_free(dev->dev, &cq->db);
 285
 286 err_cq:
 287         kfree(cq);
 288
 289         return ERR_PTR(err);
 290 }
 291
 292 static int mlx4_alloc_resize_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
 293                                   int entries)
 294 {
 295         int err;
 296
 297         if (cq->resize_buf)
 298                 return -EBUSY;
 299
 300         cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_KERNEL);
 301         if (!cq->resize_buf)
 302                 return -ENOMEM;
 303
 304         err = mlx4_ib_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
 305         if (err) {
 306                 kfree(cq->resize_buf);
 307                 cq->resize_buf = NULL;
 308                 return err;
 309         }
 310
 311         cq->resize_buf->cqe = entries - 1;
 312
 313         return 0;
 314 }
 315
 316 static int mlx4_alloc_resize_umem(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
 317                                    int entries, struct ib_udata *udata)
 318 {
 319         struct mlx4_ib_resize_cq ucmd;
 320         int err;
 321
 322         if (cq->resize_umem)
 323                 return -EBUSY;
 324
 325         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 326                 return -EFAULT;
 327
 328         cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_KERNEL);
 329         if (!cq->resize_buf)
 330                 return -ENOMEM;
 331
 332         err = mlx4_ib_get_cq_umem(dev, cq->umem->context, &cq->resize_buf->buf,
 333                                   &cq->resize_umem, ucmd.buf_addr, entries);
 334         if (err) {
 335                 kfree(cq->resize_buf);
 336                 cq->resize_buf = NULL;
 337                 return err;
 338         }
 339
 340         cq->resize_buf->cqe = entries - 1;
 341
 342         return 0;
 343 }
 344
 345 static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq)
 346 {
 347         u32 i;
 348
 349         i = cq->mcq.cons_index;
 350         while (get_sw_cqe(cq, i))
 351                 ++i;
 352
 353         return i - cq->mcq.cons_index;
 354 }
 355
 356 static void mlx4_ib_cq_resize_copy_cqes(struct mlx4_ib_cq *cq)
 357 {
 358         struct mlx4_cqe *cqe, *new_cqe;
 359         int i;
 360         int cqe_size = cq->buf.entry_size;
 361         int cqe_inc = cqe_size == 64 ? 1 : 0;
 362
 363         i = cq->mcq.cons_index;
 364         cqe = get_cqe(cq, i & cq->ibcq.cqe);
 365         cqe += cqe_inc;
 366
 367         while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) {
 368                 new_cqe = get_cqe_from_buf(&cq->resize_buf->buf,
 369                                            (i + 1) & cq->resize_buf->cqe);
 370                 memcpy(new_cqe, get_cqe(cq, i & cq->ibcq.cqe), cqe_size);
 371                 new_cqe += cqe_inc;
 372
 373                 new_cqe->owner_sr_opcode = (cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK) |
 374                         (((i + 1) & (cq->resize_buf->cqe + 1)) ? MLX4_CQE_OWNER_MASK : 0);
 375                 cqe = get_cqe(cq, ++i & cq->ibcq.cqe);
 376                 cqe += cqe_inc;
 377         }
 378         ++cq->mcq.cons_index;
 379 }
 380
 381 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 382 {
 383         struct mlx4_ib_dev *dev = to_mdev(ibcq->device);
 384         struct mlx4_ib_cq *cq = to_mcq(ibcq);
 385         struct mlx4_mtt mtt;
 386         int outst_cqe;
 387         int err;
 388
 389         mutex_lock(&cq->resize_mutex);
 390         if (entries < 1 || entries > dev->dev->caps.max_cqes) {
 391                 err = -EINVAL;
 392                 goto out;
 393         }
 394
 395         entries = roundup_pow_of_two(entries + 1);
 396         if (entries == ibcq->cqe + 1) {
 397                 err = 0;
 398                 goto out;
 399         }
 400
 401         if (entries > dev->dev->caps.max_cqes + 1) {
 402                 err = -EINVAL;
 403                 goto out;
 404         }
 405
 406         if (ibcq->uobject) {
 407                 err = mlx4_alloc_resize_umem(dev, cq, entries, udata);
 408                 if (err)
 409                         goto out;
 410         } else {
 411                 /* Can't be smaller than the number of outstanding CQEs */
 412                 outst_cqe = mlx4_ib_get_outstanding_cqes(cq);
 413                 if (entries < outst_cqe + 1) {
 414                         err = -EINVAL;
 415                         goto out;
 416                 }
 417
 418                 err = mlx4_alloc_resize_buf(dev, cq, entries);
 419                 if (err)
 420                         goto out;
 421         }
 422
 423         mtt = cq->buf.mtt;
 424
 425         err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt);
 426         if (err)
 427                 goto err_buf;
 428
 429         mlx4_mtt_cleanup(dev->dev, &mtt);
 430         if (ibcq->uobject) {
 431                 cq->buf      = cq->resize_buf->buf;
 432                 cq->ibcq.cqe = cq->resize_buf->cqe;
 433                 ib_umem_release(cq->umem);
 434                 cq->umem     = cq->resize_umem;
 435
 436                 kfree(cq->resize_buf);
 437                 cq->resize_buf = NULL;
 438                 cq->resize_umem = NULL;
 439         } else {
 440                 struct mlx4_ib_cq_buf tmp_buf;
 441                 int tmp_cqe = 0;
 442
 443                 spin_lock_irq(&cq->lock);
 444                 if (cq->resize_buf) {
 445                         mlx4_ib_cq_resize_copy_cqes(cq);
 446                         tmp_buf = cq->buf;
 447                         tmp_cqe = cq->ibcq.cqe;
 448                         cq->buf      = cq->resize_buf->buf;
 449                         cq->ibcq.cqe = cq->resize_buf->cqe;
 450
 451                         kfree(cq->resize_buf);
 452                         cq->resize_buf = NULL;
 453                 }
 454                 spin_unlock_irq(&cq->lock);
 455
 456                 if (tmp_cqe)
 457                         mlx4_ib_free_cq_buf(dev, &tmp_buf, tmp_cqe);
 458         }
 459
 460         goto out;
 461
 462 err_buf:
 463         mlx4_mtt_cleanup(dev->dev, &cq->resize_buf->buf.mtt);
 464         if (!ibcq->uobject)
 465                 mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf,
 466                                     cq->resize_buf->cqe);
 467
 468         kfree(cq->resize_buf);
 469         cq->resize_buf = NULL;
 470
 471         if (cq->resize_umem) {
 472                 ib_umem_release(cq->resize_umem);
 473                 cq->resize_umem = NULL;
 474         }
 475
 476 out:
 477         mutex_unlock(&cq->resize_mutex);
 478
 479         return err;
 480 }
 481
 482 int mlx4_ib_destroy_cq(struct ib_cq *cq)
 483 {
 484         struct mlx4_ib_dev *dev = to_mdev(cq->device);
 485         struct mlx4_ib_cq *mcq = to_mcq(cq);
 486
 487         mlx4_cq_free(dev->dev, &mcq->mcq);
 488         mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt);
 489
 490         if (cq->uobject) {
 491                 mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db);
 492                 ib_umem_release(mcq->umem);
 493         } else {
 494                 mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe);
 495                 mlx4_db_free(dev->dev, &mcq->db);
 496         }
 497
 498         kfree(mcq);
 499
 500         return 0;
 501 }
 502
 503 static void dump_cqe(void *cqe)
 504 {
 505         __be32 *buf = cqe;
 506
 507         pr_debug("CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
 508                be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]),
 509                be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]),
 510                be32_to_cpu(buf[6]), be32_to_cpu(buf[7]));
 511 }
 512
 513 static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
 514                                      struct ib_wc *wc)
 515 {
 516         if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) {
 517                 pr_debug("local QP operation err "
 518                        "(QPN %06x, WQE index %x, vendor syndrome %02x, "
 519                        "opcode = %02x)\n",
 520                        be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index),
 521                        cqe->vendor_err_syndrome,
 522                        cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
 523                 dump_cqe(cqe);
 524         }
 525
 526         switch (cqe->syndrome) {
 527         case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR:
 528                 wc->status = IB_WC_LOC_LEN_ERR;
 529                 break;
 530         case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR:
 531                 wc->status = IB_WC_LOC_QP_OP_ERR;
 532                 break;
 533         case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR:
 534                 wc->status = IB_WC_LOC_PROT_ERR;
 535                 break;
 536         case MLX4_CQE_SYNDROME_WR_FLUSH_ERR:
 537                 wc->status = IB_WC_WR_FLUSH_ERR;
 538                 break;
 539         case MLX4_CQE_SYNDROME_MW_BIND_ERR:
 540                 wc->status = IB_WC_MW_BIND_ERR;
 541                 break;
 542         case MLX4_CQE_SYNDROME_BAD_RESP_ERR:
 543                 wc->status = IB_WC_BAD_RESP_ERR;
 544                 break;
 545         case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR:
 546                 wc->status = IB_WC_LOC_ACCESS_ERR;
 547                 break;
 548         case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
 549                 wc->status = IB_WC_REM_INV_REQ_ERR;
 550                 break;
 551         case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR:
 552                 wc->status = IB_WC_REM_ACCESS_ERR;
 553                 break;
 554         case MLX4_CQE_SYNDROME_REMOTE_OP_ERR:
 555                 wc->status = IB_WC_REM_OP_ERR;
 556                 break;
 557         case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
 558                 wc->status = IB_WC_RETRY_EXC_ERR;
 559                 break;
 560         case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
 561                 wc->status = IB_WC_RNR_RETRY_EXC_ERR;
 562                 break;
 563         case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR:
 564                 wc->status = IB_WC_REM_ABORT_ERR;
 565                 break;
 566         default:
 567                 wc->status = IB_WC_GENERAL_ERR;
 568                 break;
 569         }
 570
 571         wc->vendor_err = cqe->vendor_err_syndrome;
 572 }
 573
 574 static int mlx4_ib_ipoib_csum_ok(__be16 status, __be16 checksum)
 575 {
 576         return ((status & cpu_to_be16(MLX4_CQE_STATUS_IPV4      |
 577                                       MLX4_CQE_STATUS_IPV4F     |
 578                                       MLX4_CQE_STATUS_IPV4OPT   |
 579                                       MLX4_CQE_STATUS_IPV6      |
 580                                       MLX4_CQE_STATUS_IPOK)) ==
 581                 cpu_to_be16(MLX4_CQE_STATUS_IPV4        |
 582                             MLX4_CQE_STATUS_IPOK))              &&
 583                 (status & cpu_to_be16(MLX4_CQE_STATUS_UDP       |
 584                                       MLX4_CQE_STATUS_TCP))     &&
 585                 checksum == cpu_to_be16(0xffff);
 586 }
 587
 588 static void use_tunnel_data(struct mlx4_ib_qp *qp, struct mlx4_ib_cq *cq, struct ib_wc *wc,
 589                             unsigned tail, struct mlx4_cqe *cqe, int is_eth)
 590 {
 591         struct mlx4_ib_proxy_sqp_hdr *hdr;
 592
 593         ib_dma_sync_single_for_cpu(qp->ibqp.device,
 594                                    qp->sqp_proxy_rcv[tail].map,
 595                                    sizeof (struct mlx4_ib_proxy_sqp_hdr),
 596                                    DMA_FROM_DEVICE);
 597         hdr = (struct mlx4_ib_proxy_sqp_hdr *) (qp->sqp_proxy_rcv[tail].addr);
 598         wc->pkey_index  = be16_to_cpu(hdr->tun.pkey_index);
 599         wc->src_qp      = be32_to_cpu(hdr->tun.flags_src_qp) & 0xFFFFFF;
 600         wc->wc_flags   |= (hdr->tun.g_ml_path & 0x80) ? (IB_WC_GRH) : 0;
 601         wc->dlid_path_bits = 0;
 602
 603         if (is_eth) {
 604                 wc->vlan_id = be16_to_cpu(hdr->tun.sl_vid);
 605                 memcpy(&(wc->smac[0]), (char *)&hdr->tun.mac_31_0, 4);
 606                 memcpy(&(wc->smac[4]), (char *)&hdr->tun.slid_mac_47_32, 2);
 607                 wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
 608         } else {
 609                 wc->slid        = be16_to_cpu(hdr->tun.slid_mac_47_32);
 610                 wc->sl          = (u8) (be16_to_cpu(hdr->tun.sl_vid) >> 12);
 611         }
 612 }
 613
 614 static void mlx4_ib_qp_sw_comp(struct mlx4_ib_qp *qp, int num_entries,
 615                                struct ib_wc *wc, int *npolled, int is_send)
 616 {
 617         struct mlx4_ib_wq *wq;
 618         unsigned cur;
 619         int i;
 620
 621         wq = is_send ? &qp->sq : &qp->rq;
 622         cur = wq->head - wq->tail;
 623
 624         if (cur == 0)
 625                 return;
 626
 627         for (i = 0;  i < cur && *npolled < num_entries; i++) {
 628                 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
 629                 wc->status = IB_WC_WR_FLUSH_ERR;
 630                 wc->vendor_err = MLX4_CQE_SYNDROME_WR_FLUSH_ERR;
 631                 wq->tail++;
 632                 (*npolled)++;
 633                 wc->qp = &qp->ibqp;
 634                 wc++;
 635         }
 636 }
 637
 638 static void mlx4_ib_poll_sw_comp(struct mlx4_ib_cq *cq, int num_entries,
 639                                  struct ib_wc *wc, int *npolled)
 640 {
 641         struct mlx4_ib_qp *qp;
 642
 643         *npolled = 0;
 644         /* Find uncompleted WQEs belonging to that cq and return
 645          * simulated FLUSH_ERR completions
 646          */
 647         list_for_each_entry(qp, &cq->send_qp_list, cq_send_list) {
 648                 mlx4_ib_qp_sw_comp(qp, num_entries, wc + *npolled, npolled, 1);
 649                 if (*npolled >= num_entries)
 650                         goto out;
 651         }
 652
 653         list_for_each_entry(qp, &cq->recv_qp_list, cq_recv_list) {
 654                 mlx4_ib_qp_sw_comp(qp, num_entries, wc + *npolled, npolled, 0);
 655                 if (*npolled >= num_entries)
 656                         goto out;
 657         }
 658
 659 out:
 660         return;
 661 }
 662
 663 static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
 664                             struct mlx4_ib_qp **cur_qp,
 665                             struct ib_wc *wc)
 666 {
 667         struct mlx4_cqe *cqe;
 668         struct mlx4_qp *mqp;
 669         struct mlx4_ib_wq *wq;
 670         struct mlx4_ib_srq *srq;
 671         struct mlx4_srq *msrq = NULL;
 672         int is_send;
 673         int is_error;
 674         int is_eth;
 675         u32 g_mlpath_rqpn;
 676         u16 wqe_ctr;
 677         unsigned tail = 0;
 678
 679 repoll:
 680         cqe = next_cqe_sw(cq);
 681         if (!cqe)
 682                 return -EAGAIN;
 683
 684         if (cq->buf.entry_size == 64)
 685                 cqe++;
 686
 687         ++cq->mcq.cons_index;
 688
 689         /*
 690          * Make sure we read CQ entry contents after we've checked the
 691          * ownership bit.
 692          */
 693         rmb();
 694
 695         is_send  = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
 696         is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
 697                 MLX4_CQE_OPCODE_ERROR;
 698
 699         /* Resize CQ in progress */
 700         if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) {
 701                 if (cq->resize_buf) {
 702                         struct mlx4_ib_dev *dev = to_mdev(cq->ibcq.device);
 703
 704                         mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
 705                         cq->buf      = cq->resize_buf->buf;
 706                         cq->ibcq.cqe = cq->resize_buf->cqe;
 707
 708                         kfree(cq->resize_buf);
 709                         cq->resize_buf = NULL;
 710                 }
 711
 712                 goto repoll;
 713         }
 714
 715         if (!*cur_qp ||
 716             (be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) != (*cur_qp)->mqp.qpn) {
 717                 /*
 718                  * We do not have to take the QP table lock here,
 719                  * because CQs will be locked while QPs are removed
 720                  * from the table.
 721                  */
 722                 mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
 723                                        be32_to_cpu(cqe->vlan_my_qpn));
 724                 *cur_qp = to_mibqp(mqp);
 725         }
 726
 727         wc->qp = &(*cur_qp)->ibqp;
 728
 729         if (wc->qp->qp_type == IB_QPT_XRC_TGT) {
 730                 u32 srq_num;
 731                 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
 732                 srq_num       = g_mlpath_rqpn & 0xffffff;
 733                 /* SRQ is also in the radix tree */
 734                 msrq = mlx4_srq_lookup(to_mdev(cq->ibcq.device)->dev,
 735                                        srq_num);
 736         }
 737
 738         if (is_send) {
 739                 wq = &(*cur_qp)->sq;
 740                 if (!(*cur_qp)->sq_signal_bits) {
 741                         wqe_ctr = be16_to_cpu(cqe->wqe_index);
 742                         wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
 743                 }
 744                 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
 745                 ++wq->tail;
 746         } else if ((*cur_qp)->ibqp.srq) {
 747                 srq = to_msrq((*cur_qp)->ibqp.srq);
 748                 wqe_ctr = be16_to_cpu(cqe->wqe_index);
 749                 wc->wr_id = srq->wrid[wqe_ctr];
 750                 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
 751         } else if (msrq) {
 752                 srq = to_mibsrq(msrq);
 753                 wqe_ctr = be16_to_cpu(cqe->wqe_index);
 754                 wc->wr_id = srq->wrid[wqe_ctr];
 755                 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
 756         } else {
 757                 wq        = &(*cur_qp)->rq;
 758                 tail      = wq->tail & (wq->wqe_cnt - 1);
 759                 wc->wr_id = wq->wrid[tail];
 760                 ++wq->tail;
 761         }
 762
 763         if (unlikely(is_error)) {
 764                 mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
 765                 return 0;
 766         }
 767
 768         wc->status = IB_WC_SUCCESS;
 769
 770         if (is_send) {
 771                 wc->wc_flags = 0;
 772                 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
 773                 case MLX4_OPCODE_RDMA_WRITE_IMM:
 774                         wc->wc_flags |= IB_WC_WITH_IMM;
 775                         /* fall through */
 776                 case MLX4_OPCODE_RDMA_WRITE:
 777                         wc->opcode    = IB_WC_RDMA_WRITE;
 778                         break;
 779                 case MLX4_OPCODE_SEND_IMM:
 780                         wc->wc_flags |= IB_WC_WITH_IMM;
 781                         /* fall through */
 782                 case MLX4_OPCODE_SEND:
 783                 case MLX4_OPCODE_SEND_INVAL:
 784                         wc->opcode    = IB_WC_SEND;
 785                         break;
 786                 case MLX4_OPCODE_RDMA_READ:
 787                         wc->opcode    = IB_WC_RDMA_READ;
 788                         wc->byte_len  = be32_to_cpu(cqe->byte_cnt);
 789                         break;
 790                 case MLX4_OPCODE_ATOMIC_CS:
 791                         wc->opcode    = IB_WC_COMP_SWAP;
 792                         wc->byte_len  = 8;
 793                         break;
 794                 case MLX4_OPCODE_ATOMIC_FA:
 795                         wc->opcode    = IB_WC_FETCH_ADD;
 796                         wc->byte_len  = 8;
 797                         break;
 798                 case MLX4_OPCODE_MASKED_ATOMIC_CS:
 799                         wc->opcode    = IB_WC_MASKED_COMP_SWAP;
 800                         wc->byte_len  = 8;
 801                         break;
 802                 case MLX4_OPCODE_MASKED_ATOMIC_FA:
 803                         wc->opcode    = IB_WC_MASKED_FETCH_ADD;
 804                         wc->byte_len  = 8;
 805                         break;
 806                 case MLX4_OPCODE_LSO:
 807                         wc->opcode    = IB_WC_LSO;
 808                         break;
 809                 case MLX4_OPCODE_FMR:
 810                         wc->opcode    = IB_WC_REG_MR;
 811                         break;
 812                 case MLX4_OPCODE_LOCAL_INVAL:
 813                         wc->opcode    = IB_WC_LOCAL_INV;
 814                         break;
 815                 }
 816         } else {
 817                 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
 818
 819                 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
 820                 case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
 821                         wc->opcode      = IB_WC_RECV_RDMA_WITH_IMM;
 822                         wc->wc_flags    = IB_WC_WITH_IMM;
 823                         wc->ex.imm_data = cqe->immed_rss_invalid;
 824                         break;
 825                 case MLX4_RECV_OPCODE_SEND_INVAL:
 826                         wc->opcode      = IB_WC_RECV;
 827                         wc->wc_flags    = IB_WC_WITH_INVALIDATE;
 828                         wc->ex.invalidate_rkey = be32_to_cpu(cqe->immed_rss_invalid);
 829                         break;
 830                 case MLX4_RECV_OPCODE_SEND:
 831                         wc->opcode   = IB_WC_RECV;
 832                         wc->wc_flags = 0;
 833                         break;
 834                 case MLX4_RECV_OPCODE_SEND_IMM:
 835                         wc->opcode      = IB_WC_RECV;
 836                         wc->wc_flags    = IB_WC_WITH_IMM;
 837                         wc->ex.imm_data = cqe->immed_rss_invalid;
 838                         break;
 839                 }
 840
 841                 is_eth = (rdma_port_get_link_layer(wc->qp->device,
 842                                                   (*cur_qp)->port) ==
 843                           IB_LINK_LAYER_ETHERNET);
 844                 if (mlx4_is_mfunc(to_mdev(cq->ibcq.device)->dev)) {
 845                         if ((*cur_qp)->mlx4_ib_qp_type &
 846                             (MLX4_IB_QPT_PROXY_SMI_OWNER |
 847                              MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
 848                                 use_tunnel_data(*cur_qp, cq, wc, tail, cqe,
 849                                                 is_eth);
 850                                 return 0;
 851                         }
 852                 }
 853
 854                 wc->slid           = be16_to_cpu(cqe->rlid);
 855                 g_mlpath_rqpn      = be32_to_cpu(cqe->g_mlpath_rqpn);
 856                 wc->src_qp         = g_mlpath_rqpn & 0xffffff;
 857                 wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
 858                 wc->wc_flags      |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0;
 859                 wc->pkey_index     = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
 860                 wc->wc_flags      |= mlx4_ib_ipoib_csum_ok(cqe->status,
 861                                         cqe->checksum) ? IB_WC_IP_CSUM_OK : 0;
 862                 if (is_eth) {
 863                         wc->sl  = be16_to_cpu(cqe->sl_vid) >> 13;
 864                         if (be32_to_cpu(cqe->vlan_my_qpn) &
 865                                         MLX4_CQE_CVLAN_PRESENT_MASK) {
 866                                 wc->vlan_id = be16_to_cpu(cqe->sl_vid) &
 867                                         MLX4_CQE_VID_MASK;
 868                         } else {
 869                                 wc->vlan_id = 0xffff;
 870                         }
 871                         memcpy(wc->smac, cqe->smac, ETH_ALEN);
 872                         wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
 873                 } else {
 874                         wc->sl  = be16_to_cpu(cqe->sl_vid) >> 12;
 875                         wc->vlan_id = 0xffff;
 876                 }
 877         }
 878
 879         return 0;
 880 }
 881
 882 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 883 {
 884         struct mlx4_ib_cq *cq = to_mcq(ibcq);
 885         struct mlx4_ib_qp *cur_qp = NULL;
 886         unsigned long flags;
 887         int npolled;
 888         struct mlx4_ib_dev *mdev = to_mdev(cq->ibcq.device);
 889
 890         spin_lock_irqsave(&cq->lock, flags);
 891         if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
 892                 mlx4_ib_poll_sw_comp(cq, num_entries, wc, &npolled);
 893                 goto out;
 894         }
 895
 896         for (npolled = 0; npolled < num_entries; ++npolled) {
 897                 if (mlx4_ib_poll_one(cq, &cur_qp, wc + npolled))
 898                         break;
 899         }
 900
 901         mlx4_cq_set_ci(&cq->mcq);
 902
 903 out:
 904         spin_unlock_irqrestore(&cq->lock, flags);
 905
 906         return npolled;
 907 }
 908
 909 int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
 910 {
 911         mlx4_cq_arm(&to_mcq(ibcq)->mcq,
 912                     (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
 913                     MLX4_CQ_DB_REQ_NOT_SOL : MLX4_CQ_DB_REQ_NOT,
 914                     to_mdev(ibcq->device)->uar_map,
 915                     MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock));
 916
 917         return 0;
 918 }
 919
 920 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
 921 {
 922         u32 prod_index;
 923         int nfreed = 0;
 924         struct mlx4_cqe *cqe, *dest;
 925         u8 owner_bit;
 926         int cqe_inc = cq->buf.entry_size == 64 ? 1 : 0;
 927
 928         /*
 929          * First we need to find the current producer index, so we
 930          * know where to start cleaning from.  It doesn't matter if HW
 931          * adds new entries after this loop -- the QP we're worried
 932          * about is already in RESET, so the new entries won't come
 933          * from our QP and therefore don't need to be checked.
 934          */
 935         for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index)
 936                 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
 937                         break;
 938
 939         /*
 940          * Now sweep backwards through the CQ, removing CQ entries
 941          * that match our QP by copying older entries on top of them.
 942          */
 943         while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
 944                 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
 945                 cqe += cqe_inc;
 946
 947                 if ((be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) == qpn) {
 948                         if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK))
 949                                 mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index));
 950                         ++nfreed;
 951                 } else if (nfreed) {
 952                         dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe);
 953                         dest += cqe_inc;
 954
 955                         owner_bit = dest->owner_sr_opcode & MLX4_CQE_OWNER_MASK;
 956                         memcpy(dest, cqe, sizeof *cqe);
 957                         dest->owner_sr_opcode = owner_bit |
 958                                 (dest->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
 959                 }
 960         }
 961
 962         if (nfreed) {
 963                 cq->mcq.cons_index += nfreed;
 964                 /*
 965                  * Make sure update of buffer contents is done before
 966                  * updating consumer index.
 967                  */
 968                 wmb();
 969                 mlx4_cq_set_ci(&cq->mcq);
 970         }
 971 }
 972
 973 void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
 974 {
 975         spin_lock_irq(&cq->lock);
 976         __mlx4_ib_cq_clean(cq, qpn, srq);
 977         spin_unlock_irq(&cq->lock);
 978 }