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

   1 /*
   2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <net/busy_poll.h>
  35 #include <linux/mlx4/cq.h>
  36 #include <linux/slab.h>
  37 #include <linux/mlx4/qp.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/rculist.h>
  40 #include <linux/if_ether.h>
  41 #include <linux/if_vlan.h>
  42 #include <linux/vmalloc.h>
  43
  44 #include "mlx4_en.h"
  45
  46 static int mlx4_alloc_pages(struct mlx4_en_priv *priv,
  47                             struct mlx4_en_rx_alloc *page_alloc,
  48                             const struct mlx4_en_frag_info *frag_info,
  49                             gfp_t _gfp)
  50 {
  51         int order;
  52         struct page *page;
  53         dma_addr_t dma;
  54
  55         for (order = MLX4_EN_ALLOC_PREFER_ORDER; ;) {
  56                 gfp_t gfp = _gfp;
  57
  58                 if (order)
  59                         gfp |= __GFP_COMP | __GFP_NOWARN;
  60                 page = alloc_pages(gfp, order);
  61                 if (likely(page))
  62                         break;
  63                 if (--order < 0 ||
  64                     ((PAGE_SIZE << order) < frag_info->frag_size))
  65                         return -ENOMEM;
  66         }
  67         dma = dma_map_page(priv->ddev, page, 0, PAGE_SIZE << order,
  68                            PCI_DMA_FROMDEVICE);
  69         if (dma_mapping_error(priv->ddev, dma)) {
  70                 put_page(page);
  71                 return -ENOMEM;
  72         }
  73         page_alloc->page_size = PAGE_SIZE << order;
  74         page_alloc->page = page;
  75         page_alloc->dma = dma;
  76         page_alloc->page_offset = frag_info->frag_align;
  77         /* Not doing get_page() for each frag is a big win
  78          * on asymetric workloads.
  79          */
  80         atomic_set(&page->_count,
  81                    page_alloc->page_size / frag_info->frag_stride);
  82         return 0;
  83 }
  84
  85 static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv,
  86                                struct mlx4_en_rx_desc *rx_desc,
  87                                struct mlx4_en_rx_alloc *frags,
  88                                struct mlx4_en_rx_alloc *ring_alloc,
  89                                gfp_t gfp)
  90 {
  91         struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS];
  92         const struct mlx4_en_frag_info *frag_info;
  93         struct page *page;
  94         dma_addr_t dma;
  95         int i;
  96
  97         for (i = 0; i < priv->num_frags; i++) {
  98                 frag_info = &priv->frag_info[i];
  99                 page_alloc[i] = ring_alloc[i];
 100                 page_alloc[i].page_offset += frag_info->frag_stride;
 101
 102                 if (page_alloc[i].page_offset + frag_info->frag_stride <=
 103                     ring_alloc[i].page_size)
 104                         continue;
 105
 106                 if (mlx4_alloc_pages(priv, &page_alloc[i], frag_info, gfp))
 107                         goto out;
 108         }
 109
 110         for (i = 0; i < priv->num_frags; i++) {
 111                 frags[i] = ring_alloc[i];
 112                 dma = ring_alloc[i].dma + ring_alloc[i].page_offset;
 113                 ring_alloc[i] = page_alloc[i];
 114                 rx_desc->data[i].addr = cpu_to_be64(dma);
 115         }
 116
 117         return 0;
 118
 119 out:
 120         while (i--) {
 121                 frag_info = &priv->frag_info[i];
 122                 if (page_alloc[i].page != ring_alloc[i].page) {
 123                         dma_unmap_page(priv->ddev, page_alloc[i].dma,
 124                                 page_alloc[i].page_size, PCI_DMA_FROMDEVICE);
 125                         page = page_alloc[i].page;
 126                         atomic_set(&page->_count, 1);
 127                         put_page(page);
 128                 }
 129         }
 130         return -ENOMEM;
 131 }
 132
 133 static void mlx4_en_free_frag(struct mlx4_en_priv *priv,
 134                               struct mlx4_en_rx_alloc *frags,
 135                               int i)
 136 {
 137         const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
 138         u32 next_frag_end = frags[i].page_offset + 2 * frag_info->frag_stride;
 139
 140
 141         if (next_frag_end > frags[i].page_size)
 142                 dma_unmap_page(priv->ddev, frags[i].dma, frags[i].page_size,
 143                                PCI_DMA_FROMDEVICE);
 144
 145         if (frags[i].page)
 146                 put_page(frags[i].page);
 147 }
 148
 149 static int mlx4_en_init_allocator(struct mlx4_en_priv *priv,
 150                                   struct mlx4_en_rx_ring *ring)
 151 {
 152         int i;
 153         struct mlx4_en_rx_alloc *page_alloc;
 154
 155         for (i = 0; i < priv->num_frags; i++) {
 156                 const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
 157
 158                 if (mlx4_alloc_pages(priv, &ring->page_alloc[i],
 159                                      frag_info, GFP_KERNEL))
 160                         goto out;
 161         }
 162         return 0;
 163
 164 out:
 165         while (i--) {
 166                 struct page *page;
 167
 168                 page_alloc = &ring->page_alloc[i];
 169                 dma_unmap_page(priv->ddev, page_alloc->dma,
 170                                page_alloc->page_size, PCI_DMA_FROMDEVICE);
 171                 page = page_alloc->page;
 172                 atomic_set(&page->_count, 1);
 173                 put_page(page);
 174                 page_alloc->page = NULL;
 175         }
 176         return -ENOMEM;
 177 }
 178
 179 static void mlx4_en_destroy_allocator(struct mlx4_en_priv *priv,
 180                                       struct mlx4_en_rx_ring *ring)
 181 {
 182         struct mlx4_en_rx_alloc *page_alloc;
 183         int i;
 184
 185         for (i = 0; i < priv->num_frags; i++) {
 186                 const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
 187
 188                 page_alloc = &ring->page_alloc[i];
 189                 en_dbg(DRV, priv, "Freeing allocator:%d count:%d\n",
 190                        i, page_count(page_alloc->page));
 191
 192                 dma_unmap_page(priv->ddev, page_alloc->dma,
 193                                 page_alloc->page_size, PCI_DMA_FROMDEVICE);
 194                 while (page_alloc->page_offset + frag_info->frag_stride <
 195                        page_alloc->page_size) {
 196                         put_page(page_alloc->page);
 197                         page_alloc->page_offset += frag_info->frag_stride;
 198                 }
 199                 page_alloc->page = NULL;
 200         }
 201 }
 202
 203 static void mlx4_en_init_rx_desc(struct mlx4_en_priv *priv,
 204                                  struct mlx4_en_rx_ring *ring, int index)
 205 {
 206         struct mlx4_en_rx_desc *rx_desc = ring->buf + ring->stride * index;
 207         int possible_frags;
 208         int i;
 209
 210         /* Set size and memtype fields */
 211         for (i = 0; i < priv->num_frags; i++) {
 212                 rx_desc->data[i].byte_count =
 213                         cpu_to_be32(priv->frag_info[i].frag_size);
 214                 rx_desc->data[i].lkey = cpu_to_be32(priv->mdev->mr.key);
 215         }
 216
 217         /* If the number of used fragments does not fill up the ring stride,
 218          * remaining (unused) fragments must be padded with null address/size
 219          * and a special memory key */
 220         possible_frags = (ring->stride - sizeof(struct mlx4_en_rx_desc)) / DS_SIZE;
 221         for (i = priv->num_frags; i < possible_frags; i++) {
 222                 rx_desc->data[i].byte_count = 0;
 223                 rx_desc->data[i].lkey = cpu_to_be32(MLX4_EN_MEMTYPE_PAD);
 224                 rx_desc->data[i].addr = 0;
 225         }
 226 }
 227
 228 static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv,
 229                                    struct mlx4_en_rx_ring *ring, int index,
 230                                    gfp_t gfp)
 231 {
 232         struct mlx4_en_rx_desc *rx_desc = ring->buf + (index * ring->stride);
 233         struct mlx4_en_rx_alloc *frags = ring->rx_info +
 234                                         (index << priv->log_rx_info);
 235
 236         return mlx4_en_alloc_frags(priv, rx_desc, frags, ring->page_alloc, gfp);
 237 }
 238
 239 static inline void mlx4_en_update_rx_prod_db(struct mlx4_en_rx_ring *ring)
 240 {
 241         *ring->wqres.db.db = cpu_to_be32(ring->prod & 0xffff);
 242 }
 243
 244 static void mlx4_en_free_rx_desc(struct mlx4_en_priv *priv,
 245                                  struct mlx4_en_rx_ring *ring,
 246                                  int index)
 247 {
 248         struct mlx4_en_rx_alloc *frags;
 249         int nr;
 250
 251         frags = ring->rx_info + (index << priv->log_rx_info);
 252         for (nr = 0; nr < priv->num_frags; nr++) {
 253                 en_dbg(DRV, priv, "Freeing fragment:%d\n", nr);
 254                 mlx4_en_free_frag(priv, frags, nr);
 255         }
 256 }
 257
 258 static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv)
 259 {
 260         struct mlx4_en_rx_ring *ring;
 261         int ring_ind;
 262         int buf_ind;
 263         int new_size;
 264
 265         for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) {
 266                 for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 267                         ring = priv->rx_ring[ring_ind];
 268
 269                         if (mlx4_en_prepare_rx_desc(priv, ring,
 270                                                     ring->actual_size,
 271                                                     GFP_KERNEL)) {
 272                                 if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) {
 273                                         en_err(priv, "Failed to allocate enough rx buffers\n");
 274                                         return -ENOMEM;
 275                                 } else {
 276                                         new_size = rounddown_pow_of_two(ring->actual_size);
 277                                         en_warn(priv, "Only %d buffers allocated reducing ring size to %d\n",
 278                                                 ring->actual_size, new_size);
 279                                         goto reduce_rings;
 280                                 }
 281                         }
 282                         ring->actual_size++;
 283                         ring->prod++;
 284                 }
 285         }
 286         return 0;
 287
 288 reduce_rings:
 289         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 290                 ring = priv->rx_ring[ring_ind];
 291                 while (ring->actual_size > new_size) {
 292                         ring->actual_size--;
 293                         ring->prod--;
 294                         mlx4_en_free_rx_desc(priv, ring, ring->actual_size);
 295                 }
 296         }
 297
 298         return 0;
 299 }
 300
 301 static void mlx4_en_free_rx_buf(struct mlx4_en_priv *priv,
 302                                 struct mlx4_en_rx_ring *ring)
 303 {
 304         int index;
 305
 306         en_dbg(DRV, priv, "Freeing Rx buf - cons:%d prod:%d\n",
 307                ring->cons, ring->prod);
 308
 309         /* Unmap and free Rx buffers */
 310         BUG_ON((u32) (ring->prod - ring->cons) > ring->actual_size);
 311         while (ring->cons != ring->prod) {
 312                 index = ring->cons & ring->size_mask;
 313                 en_dbg(DRV, priv, "Processing descriptor:%d\n", index);
 314                 mlx4_en_free_rx_desc(priv, ring, index);
 315                 ++ring->cons;
 316         }
 317 }
 318
 319 void mlx4_en_set_num_rx_rings(struct mlx4_en_dev *mdev)
 320 {
 321         int i;
 322         int num_of_eqs;
 323         int num_rx_rings;
 324         struct mlx4_dev *dev = mdev->dev;
 325
 326         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 327                 if (!dev->caps.comp_pool)
 328                         num_of_eqs = max_t(int, MIN_RX_RINGS,
 329                                            min_t(int,
 330                                                  dev->caps.num_comp_vectors,
 331                                                  DEF_RX_RINGS));
 332                 else
 333                         num_of_eqs = min_t(int, MAX_MSIX_P_PORT,
 334                                            dev->caps.comp_pool/
 335                                            dev->caps.num_ports) - 1;
 336
 337                 num_rx_rings = min_t(int, num_of_eqs,
 338                                      netif_get_num_default_rss_queues());
 339                 mdev->profile.prof[i].rx_ring_num =
 340                         rounddown_pow_of_two(num_rx_rings);
 341         }
 342 }
 343
 344 int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
 345                            struct mlx4_en_rx_ring **pring,
 346                            u32 size, u16 stride, int node)
 347 {
 348         struct mlx4_en_dev *mdev = priv->mdev;
 349         struct mlx4_en_rx_ring *ring;
 350         int err = -ENOMEM;
 351         int tmp;
 352
 353         ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node);
 354         if (!ring) {
 355                 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 356                 if (!ring) {
 357                         en_err(priv, "Failed to allocate RX ring structure\n");
 358                         return -ENOMEM;
 359                 }
 360         }
 361
 362         ring->prod = 0;
 363         ring->cons = 0;
 364         ring->size = size;
 365         ring->size_mask = size - 1;
 366         ring->stride = stride;
 367         ring->log_stride = ffs(ring->stride) - 1;
 368         ring->buf_size = ring->size * ring->stride + TXBB_SIZE;
 369
 370         tmp = size * roundup_pow_of_two(MLX4_EN_MAX_RX_FRAGS *
 371                                         sizeof(struct mlx4_en_rx_alloc));
 372         ring->rx_info = vmalloc_node(tmp, node);
 373         if (!ring->rx_info) {
 374                 ring->rx_info = vmalloc(tmp);
 375                 if (!ring->rx_info) {
 376                         err = -ENOMEM;
 377                         goto err_ring;
 378                 }
 379         }
 380
 381         en_dbg(DRV, priv, "Allocated rx_info ring at addr:%p size:%d\n",
 382                  ring->rx_info, tmp);
 383
 384         /* Allocate HW buffers on provided NUMA node */
 385         set_dev_node(&mdev->dev->pdev->dev, node);
 386         err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres,
 387                                  ring->buf_size, 2 * PAGE_SIZE);
 388         set_dev_node(&mdev->dev->pdev->dev, mdev->dev->numa_node);
 389         if (err)
 390                 goto err_info;
 391
 392         err = mlx4_en_map_buffer(&ring->wqres.buf);
 393         if (err) {
 394                 en_err(priv, "Failed to map RX buffer\n");
 395                 goto err_hwq;
 396         }
 397         ring->buf = ring->wqres.buf.direct.buf;
 398
 399         ring->hwtstamp_rx_filter = priv->hwtstamp_config.rx_filter;
 400
 401         *pring = ring;
 402         return 0;
 403
 404 err_hwq:
 405         mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size);
 406 err_info:
 407         vfree(ring->rx_info);
 408         ring->rx_info = NULL;
 409 err_ring:
 410         kfree(ring);
 411         *pring = NULL;
 412
 413         return err;
 414 }
 415
 416 int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
 417 {
 418         struct mlx4_en_rx_ring *ring;
 419         int i;
 420         int ring_ind;
 421         int err;
 422         int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
 423                                         DS_SIZE * priv->num_frags);
 424
 425         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 426                 ring = priv->rx_ring[ring_ind];
 427
 428                 ring->prod = 0;
 429                 ring->cons = 0;
 430                 ring->actual_size = 0;
 431                 ring->cqn = priv->rx_cq[ring_ind]->mcq.cqn;
 432
 433                 ring->stride = stride;
 434                 if (ring->stride <= TXBB_SIZE)
 435                         ring->buf += TXBB_SIZE;
 436
 437                 ring->log_stride = ffs(ring->stride) - 1;
 438                 ring->buf_size = ring->size * ring->stride;
 439
 440                 memset(ring->buf, 0, ring->buf_size);
 441                 mlx4_en_update_rx_prod_db(ring);
 442
 443                 /* Initialize all descriptors */
 444                 for (i = 0; i < ring->size; i++)
 445                         mlx4_en_init_rx_desc(priv, ring, i);
 446
 447                 /* Initialize page allocators */
 448                 err = mlx4_en_init_allocator(priv, ring);
 449                 if (err) {
 450                         en_err(priv, "Failed initializing ring allocator\n");
 451                         if (ring->stride <= TXBB_SIZE)
 452                                 ring->buf -= TXBB_SIZE;
 453                         ring_ind--;
 454                         goto err_allocator;
 455                 }
 456         }
 457         err = mlx4_en_fill_rx_buffers(priv);
 458         if (err)
 459                 goto err_buffers;
 460
 461         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 462                 ring = priv->rx_ring[ring_ind];
 463
 464                 ring->size_mask = ring->actual_size - 1;
 465                 mlx4_en_update_rx_prod_db(ring);
 466         }
 467
 468         return 0;
 469
 470 err_buffers:
 471         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++)
 472                 mlx4_en_free_rx_buf(priv, priv->rx_ring[ring_ind]);
 473
 474         ring_ind = priv->rx_ring_num - 1;
 475 err_allocator:
 476         while (ring_ind >= 0) {
 477                 if (priv->rx_ring[ring_ind]->stride <= TXBB_SIZE)
 478                         priv->rx_ring[ring_ind]->buf -= TXBB_SIZE;
 479                 mlx4_en_destroy_allocator(priv, priv->rx_ring[ring_ind]);
 480                 ring_ind--;
 481         }
 482         return err;
 483 }
 484
 485 void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv,
 486                              struct mlx4_en_rx_ring **pring,
 487                              u32 size, u16 stride)
 488 {
 489         struct mlx4_en_dev *mdev = priv->mdev;
 490         struct mlx4_en_rx_ring *ring = *pring;
 491
 492         mlx4_en_unmap_buffer(&ring->wqres.buf);
 493         mlx4_free_hwq_res(mdev->dev, &ring->wqres, size * stride + TXBB_SIZE);
 494         vfree(ring->rx_info);
 495         ring->rx_info = NULL;
 496         kfree(ring);
 497         *pring = NULL;
 498 #ifdef CONFIG_RFS_ACCEL
 499         mlx4_en_cleanup_filters(priv);
 500 #endif
 501 }
 502
 503 void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv,
 504                                 struct mlx4_en_rx_ring *ring)
 505 {
 506         mlx4_en_free_rx_buf(priv, ring);
 507         if (ring->stride <= TXBB_SIZE)
 508                 ring->buf -= TXBB_SIZE;
 509         mlx4_en_destroy_allocator(priv, ring);
 510 }
 511
 512
 513 static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv,
 514                                     struct mlx4_en_rx_desc *rx_desc,
 515                                     struct mlx4_en_rx_alloc *frags,
 516                                     struct sk_buff *skb,
 517                                     int length)
 518 {
 519         struct skb_frag_struct *skb_frags_rx = skb_shinfo(skb)->frags;
 520         struct mlx4_en_frag_info *frag_info;
 521         int nr;
 522         dma_addr_t dma;
 523
 524         /* Collect used fragments while replacing them in the HW descriptors */
 525         for (nr = 0; nr < priv->num_frags; nr++) {
 526                 frag_info = &priv->frag_info[nr];
 527                 if (length <= frag_info->frag_prefix_size)
 528                         break;
 529                 if (!frags[nr].page)
 530                         goto fail;
 531
 532                 dma = be64_to_cpu(rx_desc->data[nr].addr);
 533                 dma_sync_single_for_cpu(priv->ddev, dma, frag_info->frag_size,
 534                                         DMA_FROM_DEVICE);
 535
 536                 /* Save page reference in skb */
 537                 __skb_frag_set_page(&skb_frags_rx[nr], frags[nr].page);
 538                 skb_frag_size_set(&skb_frags_rx[nr], frag_info->frag_size);
 539                 skb_frags_rx[nr].page_offset = frags[nr].page_offset;
 540                 skb->truesize += frag_info->frag_stride;
 541                 frags[nr].page = NULL;
 542         }
 543         /* Adjust size of last fragment to match actual length */
 544         if (nr > 0)
 545                 skb_frag_size_set(&skb_frags_rx[nr - 1],
 546                         length - priv->frag_info[nr - 1].frag_prefix_size);
 547         return nr;
 548
 549 fail:
 550         while (nr > 0) {
 551                 nr--;
 552                 __skb_frag_unref(&skb_frags_rx[nr]);
 553         }
 554         return 0;
 555 }
 556
 557
 558 static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
 559                                       struct mlx4_en_rx_desc *rx_desc,
 560                                       struct mlx4_en_rx_alloc *frags,
 561                                       unsigned int length)
 562 {
 563         struct sk_buff *skb;
 564         void *va;
 565         int used_frags;
 566         dma_addr_t dma;
 567
 568         skb = netdev_alloc_skb(priv->dev, SMALL_PACKET_SIZE + NET_IP_ALIGN);
 569         if (!skb) {
 570                 en_dbg(RX_ERR, priv, "Failed allocating skb\n");
 571                 return NULL;
 572         }
 573         skb_reserve(skb, NET_IP_ALIGN);
 574         skb->len = length;
 575
 576         /* Get pointer to first fragment so we could copy the headers into the
 577          * (linear part of the) skb */
 578         va = page_address(frags[0].page) + frags[0].page_offset;
 579
 580         if (length <= SMALL_PACKET_SIZE) {
 581                 /* We are copying all relevant data to the skb - temporarily
 582                  * sync buffers for the copy */
 583                 dma = be64_to_cpu(rx_desc->data[0].addr);
 584                 dma_sync_single_for_cpu(priv->ddev, dma, length,
 585                                         DMA_FROM_DEVICE);
 586                 skb_copy_to_linear_data(skb, va, length);
 587                 skb->tail += length;
 588         } else {
 589                 /* Move relevant fragments to skb */
 590                 used_frags = mlx4_en_complete_rx_desc(priv, rx_desc, frags,
 591                                                         skb, length);
 592                 if (unlikely(!used_frags)) {
 593                         kfree_skb(skb);
 594                         return NULL;
 595                 }
 596                 skb_shinfo(skb)->nr_frags = used_frags;
 597
 598                 /* Copy headers into the skb linear buffer */
 599                 memcpy(skb->data, va, HEADER_COPY_SIZE);
 600                 skb->tail += HEADER_COPY_SIZE;
 601
 602                 /* Skip headers in first fragment */
 603                 skb_shinfo(skb)->frags[0].page_offset += HEADER_COPY_SIZE;
 604
 605                 /* Adjust size of first fragment */
 606                 skb_frag_size_sub(&skb_shinfo(skb)->frags[0], HEADER_COPY_SIZE);
 607                 skb->data_len = length - HEADER_COPY_SIZE;
 608         }
 609         return skb;
 610 }
 611
 612 static void validate_loopback(struct mlx4_en_priv *priv, struct sk_buff *skb)
 613 {
 614         int i;
 615         int offset = ETH_HLEN;
 616
 617         for (i = 0; i < MLX4_LOOPBACK_TEST_PAYLOAD; i++, offset++) {
 618                 if (*(skb->data + offset) != (unsigned char) (i & 0xff))
 619                         goto out_loopback;
 620         }
 621         /* Loopback found */
 622         priv->loopback_ok = 1;
 623
 624 out_loopback:
 625         dev_kfree_skb_any(skb);
 626 }
 627
 628 static void mlx4_en_refill_rx_buffers(struct mlx4_en_priv *priv,
 629                                      struct mlx4_en_rx_ring *ring)
 630 {
 631         int index = ring->prod & ring->size_mask;
 632
 633         while ((u32) (ring->prod - ring->cons) < ring->actual_size) {
 634                 if (mlx4_en_prepare_rx_desc(priv, ring, index, GFP_ATOMIC))
 635                         break;
 636                 ring->prod++;
 637                 index = ring->prod & ring->size_mask;
 638         }
 639 }
 640
 641 int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget)
 642 {
 643         struct mlx4_en_priv *priv = netdev_priv(dev);
 644         struct mlx4_en_dev *mdev = priv->mdev;
 645         struct mlx4_cqe *cqe;
 646         struct mlx4_en_rx_ring *ring = priv->rx_ring[cq->ring];
 647         struct mlx4_en_rx_alloc *frags;
 648         struct mlx4_en_rx_desc *rx_desc;
 649         struct sk_buff *skb;
 650         int index;
 651         int nr;
 652         unsigned int length;
 653         int polled = 0;
 654         int ip_summed;
 655         int factor = priv->cqe_factor;
 656         u64 timestamp;
 657         bool l2_tunnel;
 658
 659         if (!priv->port_up)
 660                 return 0;
 661
 662         if (budget <= 0)
 663                 return polled;
 664
 665         /* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx
 666          * descriptor offset can be deduced from the CQE index instead of
 667          * reading 'cqe->index' */
 668         index = cq->mcq.cons_index & ring->size_mask;
 669         cqe = &cq->buf[(index << factor) + factor];
 670
 671         /* Process all completed CQEs */
 672         while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK,
 673                     cq->mcq.cons_index & cq->size)) {
 674
 675                 frags = ring->rx_info + (index << priv->log_rx_info);
 676                 rx_desc = ring->buf + (index << ring->log_stride);
 677
 678                 /*
 679                  * make sure we read the CQE after we read the ownership bit
 680                  */
 681                 rmb();
 682
 683                 /* Drop packet on bad receive or bad checksum */
 684                 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
 685                                                 MLX4_CQE_OPCODE_ERROR)) {
 686                         en_err(priv, "CQE completed in error - vendor syndrom:%d syndrom:%d\n",
 687                                ((struct mlx4_err_cqe *)cqe)->vendor_err_syndrome,
 688                                ((struct mlx4_err_cqe *)cqe)->syndrome);
 689                         goto next;
 690                 }
 691                 if (unlikely(cqe->badfcs_enc & MLX4_CQE_BAD_FCS)) {
 692                         en_dbg(RX_ERR, priv, "Accepted frame with bad FCS\n");
 693                         goto next;
 694                 }
 695
 696                 /* Check if we need to drop the packet if SRIOV is not enabled
 697                  * and not performing the selftest or flb disabled
 698                  */
 699                 if (priv->flags & MLX4_EN_FLAG_RX_FILTER_NEEDED) {
 700                         struct ethhdr *ethh;
 701                         dma_addr_t dma;
 702                         /* Get pointer to first fragment since we haven't
 703                          * skb yet and cast it to ethhdr struct
 704                          */
 705                         dma = be64_to_cpu(rx_desc->data[0].addr);
 706                         dma_sync_single_for_cpu(priv->ddev, dma, sizeof(*ethh),
 707                                                 DMA_FROM_DEVICE);
 708                         ethh = (struct ethhdr *)(page_address(frags[0].page) +
 709                                                  frags[0].page_offset);
 710
 711                         if (is_multicast_ether_addr(ethh->h_dest)) {
 712                                 struct mlx4_mac_entry *entry;
 713                                 struct hlist_head *bucket;
 714                                 unsigned int mac_hash;
 715
 716                                 /* Drop the packet, since HW loopback-ed it */
 717                                 mac_hash = ethh->h_source[MLX4_EN_MAC_HASH_IDX];
 718                                 bucket = &priv->mac_hash[mac_hash];
 719                                 rcu_read_lock();
 720                                 hlist_for_each_entry_rcu(entry, bucket, hlist) {
 721                                         if (ether_addr_equal_64bits(entry->mac,
 722                                                                     ethh->h_source)) {
 723                                                 rcu_read_unlock();
 724                                                 goto next;
 725                                         }
 726                                 }
 727                                 rcu_read_unlock();
 728                         }
 729                 }
 730
 731                 /*
 732                  * Packet is OK - process it.
 733                  */
 734                 length = be32_to_cpu(cqe->byte_cnt);
 735                 length -= ring->fcs_del;
 736                 ring->bytes += length;
 737                 ring->packets++;
 738                 l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) &&
 739                         (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL));
 740
 741                 if (likely(dev->features & NETIF_F_RXCSUM)) {
 742                         if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
 743                             (cqe->checksum == cpu_to_be16(0xffff))) {
 744                                 ring->csum_ok++;
 745                                 /* This packet is eligible for GRO if it is:
 746                                  * - DIX Ethernet (type interpretation)
 747                                  * - TCP/IP (v4)
 748                                  * - without IP options
 749                                  * - not an IP fragment
 750                                  * - no LLS polling in progress
 751                                  */
 752                                 if (!mlx4_en_cq_busy_polling(cq) &&
 753                                     (dev->features & NETIF_F_GRO)) {
 754                                         struct sk_buff *gro_skb = napi_get_frags(&cq->napi);
 755                                         if (!gro_skb)
 756                                                 goto next;
 757
 758                                         nr = mlx4_en_complete_rx_desc(priv,
 759                                                 rx_desc, frags, gro_skb,
 760                                                 length);
 761                                         if (!nr)
 762                                                 goto next;
 763
 764                                         skb_shinfo(gro_skb)->nr_frags = nr;
 765                                         gro_skb->len = length;
 766                                         gro_skb->data_len = length;
 767                                         gro_skb->ip_summed = CHECKSUM_UNNECESSARY;
 768
 769                                         if (l2_tunnel)
 770                                                 gro_skb->encapsulation = 1;
 771                                         if ((cqe->vlan_my_qpn &
 772                                             cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK)) &&
 773                                             (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) {
 774                                                 u16 vid = be16_to_cpu(cqe->sl_vid);
 775
 776                                                 __vlan_hwaccel_put_tag(gro_skb, htons(ETH_P_8021Q), vid);
 777                                         }
 778
 779                                         if (dev->features & NETIF_F_RXHASH)
 780                                                 skb_set_hash(gro_skb,
 781                                                              be32_to_cpu(cqe->immed_rss_invalid),
 782                                                              PKT_HASH_TYPE_L3);
 783
 784                                         skb_record_rx_queue(gro_skb, cq->ring);
 785
 786                                         if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) {
 787                                                 timestamp = mlx4_en_get_cqe_ts(cqe);
 788                                                 mlx4_en_fill_hwtstamps(mdev,
 789                                                                        skb_hwtstamps(gro_skb),
 790                                                                        timestamp);
 791                                         }
 792
 793                                         napi_gro_frags(&cq->napi);
 794                                         goto next;
 795                                 }
 796
 797                                 /* GRO not possible, complete processing here */
 798                                 ip_summed = CHECKSUM_UNNECESSARY;
 799                         } else {
 800                                 ip_summed = CHECKSUM_NONE;
 801                                 ring->csum_none++;
 802                         }
 803                 } else {
 804                         ip_summed = CHECKSUM_NONE;
 805                         ring->csum_none++;
 806                 }
 807
 808                 skb = mlx4_en_rx_skb(priv, rx_desc, frags, length);
 809                 if (!skb) {
 810                         priv->stats.rx_dropped++;
 811                         goto next;
 812                 }
 813
 814                 if (unlikely(priv->validate_loopback)) {
 815                         validate_loopback(priv, skb);
 816                         goto next;
 817                 }
 818
 819                 skb->ip_summed = ip_summed;
 820                 skb->protocol = eth_type_trans(skb, dev);
 821                 skb_record_rx_queue(skb, cq->ring);
 822
 823                 if (l2_tunnel)
 824                         skb->encapsulation = 1;
 825
 826                 if (dev->features & NETIF_F_RXHASH)
 827                         skb_set_hash(skb,
 828                                      be32_to_cpu(cqe->immed_rss_invalid),
 829                                      PKT_HASH_TYPE_L3);
 830
 831                 if ((be32_to_cpu(cqe->vlan_my_qpn) &
 832                     MLX4_CQE_VLAN_PRESENT_MASK) &&
 833                     (dev->features & NETIF_F_HW_VLAN_CTAG_RX))
 834                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), be16_to_cpu(cqe->sl_vid));
 835
 836                 if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) {
 837                         timestamp = mlx4_en_get_cqe_ts(cqe);
 838                         mlx4_en_fill_hwtstamps(mdev, skb_hwtstamps(skb),
 839                                                timestamp);
 840                 }
 841
 842                 skb_mark_napi_id(skb, &cq->napi);
 843
 844                 if (!mlx4_en_cq_busy_polling(cq))
 845                         napi_gro_receive(&cq->napi, skb);
 846                 else
 847                         netif_receive_skb(skb);
 848
 849 next:
 850                 for (nr = 0; nr < priv->num_frags; nr++)
 851                         mlx4_en_free_frag(priv, frags, nr);
 852
 853                 ++cq->mcq.cons_index;
 854                 index = (cq->mcq.cons_index) & ring->size_mask;
 855                 cqe = &cq->buf[(index << factor) + factor];
 856                 if (++polled == budget)
 857                         goto out;
 858         }
 859
 860 out:
 861         AVG_PERF_COUNTER(priv->pstats.rx_coal_avg, polled);
 862         mlx4_cq_set_ci(&cq->mcq);
 863         wmb(); /* ensure HW sees CQ consumer before we post new buffers */
 864         ring->cons = cq->mcq.cons_index;
 865         mlx4_en_refill_rx_buffers(priv, ring);
 866         mlx4_en_update_rx_prod_db(ring);
 867         return polled;
 868 }
 869
 870
 871 void mlx4_en_rx_irq(struct mlx4_cq *mcq)
 872 {
 873         struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq);
 874         struct mlx4_en_priv *priv = netdev_priv(cq->dev);
 875
 876         if (priv->port_up)
 877                 napi_schedule(&cq->napi);
 878         else
 879                 mlx4_en_arm_cq(priv, cq);
 880 }
 881
 882 /* Rx CQ polling - called by NAPI */
 883 int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget)
 884 {
 885         struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi);
 886         struct net_device *dev = cq->dev;
 887         struct mlx4_en_priv *priv = netdev_priv(dev);
 888         int done;
 889
 890         if (!mlx4_en_cq_lock_napi(cq))
 891                 return budget;
 892
 893         done = mlx4_en_process_rx_cq(dev, cq, budget);
 894
 895         mlx4_en_cq_unlock_napi(cq);
 896
 897         /* If we used up all the quota - we're probably not done yet... */
 898         if (done == budget) {
 899                 INC_PERF_COUNTER(priv->pstats.napi_quota);
 900                 if (unlikely(cq->mcq.irq_affinity_change)) {
 901                         cq->mcq.irq_affinity_change = false;
 902                         napi_complete(napi);
 903                         mlx4_en_arm_cq(priv, cq);
 904                         return 0;
 905                 }
 906         } else {
 907                 /* Done for now */
 908                 cq->mcq.irq_affinity_change = false;
 909                 napi_complete(napi);
 910                 mlx4_en_arm_cq(priv, cq);
 911         }
 912         return done;
 913 }
 914
 915 static const int frag_sizes[] = {
 916         FRAG_SZ0,
 917         FRAG_SZ1,
 918         FRAG_SZ2,
 919         FRAG_SZ3
 920 };
 921
 922 void mlx4_en_calc_rx_buf(struct net_device *dev)
 923 {
 924         struct mlx4_en_priv *priv = netdev_priv(dev);
 925         int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN + ETH_LLC_SNAP_SIZE;
 926         int buf_size = 0;
 927         int i = 0;
 928
 929         while (buf_size < eff_mtu) {
 930                 priv->frag_info[i].frag_size =
 931                         (eff_mtu > buf_size + frag_sizes[i]) ?
 932                                 frag_sizes[i] : eff_mtu - buf_size;
 933                 priv->frag_info[i].frag_prefix_size = buf_size;
 934                 if (!i) {
 935                         priv->frag_info[i].frag_align = NET_IP_ALIGN;
 936                         priv->frag_info[i].frag_stride =
 937                                 ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES);
 938                 } else {
 939                         priv->frag_info[i].frag_align = 0;
 940                         priv->frag_info[i].frag_stride =
 941                                 ALIGN(frag_sizes[i], SMP_CACHE_BYTES);
 942                 }
 943                 buf_size += priv->frag_info[i].frag_size;
 944                 i++;
 945         }
 946
 947         priv->num_frags = i;
 948         priv->rx_skb_size = eff_mtu;
 949         priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct mlx4_en_rx_alloc));
 950
 951         en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d num_frags:%d):\n",
 952                eff_mtu, priv->num_frags);
 953         for (i = 0; i < priv->num_frags; i++) {
 954                 en_err(priv,
 955                        "  frag:%d - size:%d prefix:%d align:%d stride:%d\n",
 956                        i,
 957                        priv->frag_info[i].frag_size,
 958                        priv->frag_info[i].frag_prefix_size,
 959                        priv->frag_info[i].frag_align,
 960                        priv->frag_info[i].frag_stride);
 961         }
 962 }
 963
 964 /* RSS related functions */
 965
 966 static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn,
 967                                  struct mlx4_en_rx_ring *ring,
 968                                  enum mlx4_qp_state *state,
 969                                  struct mlx4_qp *qp)
 970 {
 971         struct mlx4_en_dev *mdev = priv->mdev;
 972         struct mlx4_qp_context *context;
 973         int err = 0;
 974
 975         context = kmalloc(sizeof(*context), GFP_KERNEL);
 976         if (!context)
 977                 return -ENOMEM;
 978
 979         err = mlx4_qp_alloc(mdev->dev, qpn, qp, GFP_KERNEL);
 980         if (err) {
 981                 en_err(priv, "Failed to allocate qp #%x\n", qpn);
 982                 goto out;
 983         }
 984         qp->event = mlx4_en_sqp_event;
 985
 986         memset(context, 0, sizeof *context);
 987         mlx4_en_fill_qp_context(priv, ring->actual_size, ring->stride, 0, 0,
 988                                 qpn, ring->cqn, -1, context);
 989         context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma);
 990
 991         /* Cancel FCS removal if FW allows */
 992         if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP) {
 993                 context->param3 |= cpu_to_be32(1 << 29);
 994                 ring->fcs_del = ETH_FCS_LEN;
 995         } else
 996                 ring->fcs_del = 0;
 997
 998         err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, context, qp, state);
 999         if (err) {
1000                 mlx4_qp_remove(mdev->dev, qp);
1001                 mlx4_qp_free(mdev->dev, qp);
1002         }
1003         mlx4_en_update_rx_prod_db(ring);
1004 out:
1005         kfree(context);
1006         return err;
1007 }
1008
1009 int mlx4_en_create_drop_qp(struct mlx4_en_priv *priv)
1010 {
1011         int err;
1012         u32 qpn;
1013
1014         err = mlx4_qp_reserve_range(priv->mdev->dev, 1, 1, &qpn);
1015         if (err) {
1016                 en_err(priv, "Failed reserving drop qpn\n");
1017                 return err;
1018         }
1019         err = mlx4_qp_alloc(priv->mdev->dev, qpn, &priv->drop_qp, GFP_KERNEL);
1020         if (err) {
1021                 en_err(priv, "Failed allocating drop qp\n");
1022                 mlx4_qp_release_range(priv->mdev->dev, qpn, 1);
1023                 return err;
1024         }
1025
1026         return 0;
1027 }
1028
1029 void mlx4_en_destroy_drop_qp(struct mlx4_en_priv *priv)
1030 {
1031         u32 qpn;
1032
1033         qpn = priv->drop_qp.qpn;
1034         mlx4_qp_remove(priv->mdev->dev, &priv->drop_qp);
1035         mlx4_qp_free(priv->mdev->dev, &priv->drop_qp);
1036         mlx4_qp_release_range(priv->mdev->dev, qpn, 1);
1037 }
1038
1039 /* Allocate rx qp's and configure them according to rss map */
1040 int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
1041 {
1042         struct mlx4_en_dev *mdev = priv->mdev;
1043         struct mlx4_en_rss_map *rss_map = &priv->rss_map;
1044         struct mlx4_qp_context context;
1045         struct mlx4_rss_context *rss_context;
1046         int rss_rings;
1047         void *ptr;
1048         u8 rss_mask = (MLX4_RSS_IPV4 | MLX4_RSS_TCP_IPV4 | MLX4_RSS_IPV6 |
1049                         MLX4_RSS_TCP_IPV6);
1050         int i, qpn;
1051         int err = 0;
1052         int good_qps = 0;
1053         static const u32 rsskey[10] = { 0xD181C62C, 0xF7F4DB5B, 0x1983A2FC,
1054                                 0x943E1ADB, 0xD9389E6B, 0xD1039C2C, 0xA74499AD,
1055                                 0x593D56D9, 0xF3253C06, 0x2ADC1FFC};
1056
1057         en_dbg(DRV, priv, "Configuring rss steering\n");
1058         err = mlx4_qp_reserve_range(mdev->dev, priv->rx_ring_num,
1059                                     priv->rx_ring_num,
1060                                     &rss_map->base_qpn);
1061         if (err) {
1062                 en_err(priv, "Failed reserving %d qps\n", priv->rx_ring_num);
1063                 return err;
1064         }
1065
1066         for (i = 0; i < priv->rx_ring_num; i++) {
1067                 qpn = rss_map->base_qpn + i;
1068                 err = mlx4_en_config_rss_qp(priv, qpn, priv->rx_ring[i],
1069                                             &rss_map->state[i],
1070                                             &rss_map->qps[i]);
1071                 if (err)
1072                         goto rss_err;
1073
1074                 ++good_qps;
1075         }
1076
1077         /* Configure RSS indirection qp */
1078         err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, &rss_map->indir_qp, GFP_KERNEL);
1079         if (err) {
1080                 en_err(priv, "Failed to allocate RSS indirection QP\n");
1081                 goto rss_err;
1082         }
1083         rss_map->indir_qp.event = mlx4_en_sqp_event;
1084         mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn,
1085                                 priv->rx_ring[0]->cqn, -1, &context);
1086
1087         if (!priv->prof->rss_rings || priv->prof->rss_rings > priv->rx_ring_num)
1088                 rss_rings = priv->rx_ring_num;
1089         else
1090                 rss_rings = priv->prof->rss_rings;
1091
1092         ptr = ((void *) &context) + offsetof(struct mlx4_qp_context, pri_path)
1093                                         + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH;
1094         rss_context = ptr;
1095         rss_context->base_qpn = cpu_to_be32(ilog2(rss_rings) << 24 |
1096                                             (rss_map->base_qpn));
1097         rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn);
1098         if (priv->mdev->profile.udp_rss) {
1099                 rss_mask |=  MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6;
1100                 rss_context->base_qpn_udp = rss_context->default_qpn;
1101         }
1102
1103         if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1104                 en_info(priv, "Setting RSS context tunnel type to RSS on inner headers\n");
1105                 rss_mask |= MLX4_RSS_BY_INNER_HEADERS;
1106         }
1107
1108         rss_context->flags = rss_mask;
1109         rss_context->hash_fn = MLX4_RSS_HASH_TOP;
1110         for (i = 0; i < 10; i++)
1111                 rss_context->rss_key[i] = cpu_to_be32(rsskey[i]);
1112
1113         err = mlx4_qp_to_ready(mdev->dev, &priv->res.mtt, &context,
1114                                &rss_map->indir_qp, &rss_map->indir_state);
1115         if (err)
1116                 goto indir_err;
1117
1118         return 0;
1119
1120 indir_err:
1121         mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
1122                        MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
1123         mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
1124         mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
1125 rss_err:
1126         for (i = 0; i < good_qps; i++) {
1127                 mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
1128                                MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
1129                 mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
1130                 mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
1131         }
1132         mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num);
1133         return err;
1134 }
1135
1136 void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv)
1137 {
1138         struct mlx4_en_dev *mdev = priv->mdev;
1139         struct mlx4_en_rss_map *rss_map = &priv->rss_map;
1140         int i;
1141
1142         mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
1143                        MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
1144         mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
1145         mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
1146
1147         for (i = 0; i < priv->rx_ring_num; i++) {
1148                 mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
1149                                MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
1150                 mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
1151                 mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
1152         }
1153         mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num);
1154 }