drivers/net/ethernet/mellanox/mlx5/core/en_rx.c

   1 /*
   2  * Copyright (c) 2015, 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 #include <linux/prefetch.h>
  34 #include <linux/ip.h>
  35 #include <linux/ipv6.h>
  36 #include <linux/tcp.h>
  37 #include <linux/bpf_trace.h>
  38 #include <net/busy_poll.h>
  39 #include <net/ip6_checksum.h>
  40 #include <net/page_pool.h>
  41 #include "en.h"
  42 #include "en_tc.h"
  43 #include "eswitch.h"
  44 #include "en_rep.h"
  45 #include "ipoib/ipoib.h"
  46 #include "en_accel/ipsec_rxtx.h"
  47 #include "lib/clock.h"
  48
  49 static inline bool mlx5e_rx_hw_stamp(struct hwtstamp_config *config)
  50 {
  51         return config->rx_filter == HWTSTAMP_FILTER_ALL;
  52 }
  53
  54 static inline void mlx5e_read_cqe_slot(struct mlx5e_cq *cq, u32 cqcc,
  55                                        void *data)
  56 {
  57         u32 ci = mlx5_cqwq_ctr2ix(&cq->wq, cqcc);
  58
  59         memcpy(data, mlx5_cqwq_get_wqe(&cq->wq, ci), sizeof(struct mlx5_cqe64));
  60 }
  61
  62 static inline void mlx5e_read_title_slot(struct mlx5e_rq *rq,
  63                                          struct mlx5e_cq *cq, u32 cqcc)
  64 {
  65         mlx5e_read_cqe_slot(cq, cqcc, &cq->title);
  66         cq->decmprs_left        = be32_to_cpu(cq->title.byte_cnt);
  67         cq->decmprs_wqe_counter = be16_to_cpu(cq->title.wqe_counter);
  68         rq->stats->cqe_compress_blks++;
  69 }
  70
  71 static inline void mlx5e_read_mini_arr_slot(struct mlx5e_cq *cq, u32 cqcc)
  72 {
  73         mlx5e_read_cqe_slot(cq, cqcc, cq->mini_arr);
  74         cq->mini_arr_idx = 0;
  75 }
  76
  77 static inline void mlx5e_cqes_update_owner(struct mlx5e_cq *cq, u32 cqcc, int n)
  78 {
  79         struct mlx5_cqwq *wq = &cq->wq;
  80
  81         u8  op_own = mlx5_cqwq_get_ctr_wrap_cnt(wq, cqcc) & 1;
  82         u32 ci     = mlx5_cqwq_ctr2ix(wq, cqcc);
  83         u32 wq_sz  = mlx5_cqwq_get_size(wq);
  84         u32 ci_top = min_t(u32, wq_sz, ci + n);
  85
  86         for (; ci < ci_top; ci++, n--) {
  87                 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->wq, ci);
  88
  89                 cqe->op_own = op_own;
  90         }
  91
  92         if (unlikely(ci == wq_sz)) {
  93                 op_own = !op_own;
  94                 for (ci = 0; ci < n; ci++) {
  95                         struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->wq, ci);
  96
  97                         cqe->op_own = op_own;
  98                 }
  99         }
 100 }
 101
 102 static inline void mlx5e_decompress_cqe(struct mlx5e_rq *rq,
 103                                         struct mlx5e_cq *cq, u32 cqcc)
 104 {
 105         cq->title.byte_cnt     = cq->mini_arr[cq->mini_arr_idx].byte_cnt;
 106         cq->title.check_sum    = cq->mini_arr[cq->mini_arr_idx].checksum;
 107         cq->title.op_own      &= 0xf0;
 108         cq->title.op_own      |= 0x01 & (cqcc >> cq->wq.fbc.log_sz);
 109         cq->title.wqe_counter  = cpu_to_be16(cq->decmprs_wqe_counter);
 110
 111         if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ)
 112                 cq->decmprs_wqe_counter +=
 113                         mpwrq_get_cqe_consumed_strides(&cq->title);
 114         else
 115                 cq->decmprs_wqe_counter =
 116                         mlx5_wq_cyc_ctr2ix(&rq->wqe.wq, cq->decmprs_wqe_counter + 1);
 117 }
 118
 119 static inline void mlx5e_decompress_cqe_no_hash(struct mlx5e_rq *rq,
 120                                                 struct mlx5e_cq *cq, u32 cqcc)
 121 {
 122         mlx5e_decompress_cqe(rq, cq, cqcc);
 123         cq->title.rss_hash_type   = 0;
 124         cq->title.rss_hash_result = 0;
 125 }
 126
 127 static inline u32 mlx5e_decompress_cqes_cont(struct mlx5e_rq *rq,
 128                                              struct mlx5e_cq *cq,
 129                                              int update_owner_only,
 130                                              int budget_rem)
 131 {
 132         u32 cqcc = cq->wq.cc + update_owner_only;
 133         u32 cqe_count;
 134         u32 i;
 135
 136         cqe_count = min_t(u32, cq->decmprs_left, budget_rem);
 137
 138         for (i = update_owner_only; i < cqe_count;
 139              i++, cq->mini_arr_idx++, cqcc++) {
 140                 if (cq->mini_arr_idx == MLX5_MINI_CQE_ARRAY_SIZE)
 141                         mlx5e_read_mini_arr_slot(cq, cqcc);
 142
 143                 mlx5e_decompress_cqe_no_hash(rq, cq, cqcc);
 144                 rq->handle_rx_cqe(rq, &cq->title);
 145         }
 146         mlx5e_cqes_update_owner(cq, cq->wq.cc, cqcc - cq->wq.cc);
 147         cq->wq.cc = cqcc;
 148         cq->decmprs_left -= cqe_count;
 149         rq->stats->cqe_compress_pkts += cqe_count;
 150
 151         return cqe_count;
 152 }
 153
 154 static inline u32 mlx5e_decompress_cqes_start(struct mlx5e_rq *rq,
 155                                               struct mlx5e_cq *cq,
 156                                               int budget_rem)
 157 {
 158         mlx5e_read_title_slot(rq, cq, cq->wq.cc);
 159         mlx5e_read_mini_arr_slot(cq, cq->wq.cc + 1);
 160         mlx5e_decompress_cqe(rq, cq, cq->wq.cc);
 161         rq->handle_rx_cqe(rq, &cq->title);
 162         cq->mini_arr_idx++;
 163
 164         return mlx5e_decompress_cqes_cont(rq, cq, 1, budget_rem) - 1;
 165 }
 166
 167 static inline bool mlx5e_page_is_reserved(struct page *page)
 168 {
 169         return page_is_pfmemalloc(page) || page_to_nid(page) != numa_mem_id();
 170 }
 171
 172 static inline bool mlx5e_rx_cache_put(struct mlx5e_rq *rq,
 173                                       struct mlx5e_dma_info *dma_info)
 174 {
 175         struct mlx5e_page_cache *cache = &rq->page_cache;
 176         u32 tail_next = (cache->tail + 1) & (MLX5E_CACHE_SIZE - 1);
 177         struct mlx5e_rq_stats *stats = rq->stats;
 178
 179         if (tail_next == cache->head) {
 180                 stats->cache_full++;
 181                 return false;
 182         }
 183
 184         if (unlikely(mlx5e_page_is_reserved(dma_info->page))) {
 185                 stats->cache_waive++;
 186                 return false;
 187         }
 188
 189         cache->page_cache[cache->tail] = *dma_info;
 190         cache->tail = tail_next;
 191         return true;
 192 }
 193
 194 static inline bool mlx5e_rx_cache_get(struct mlx5e_rq *rq,
 195                                       struct mlx5e_dma_info *dma_info)
 196 {
 197         struct mlx5e_page_cache *cache = &rq->page_cache;
 198         struct mlx5e_rq_stats *stats = rq->stats;
 199
 200         if (unlikely(cache->head == cache->tail)) {
 201                 stats->cache_empty++;
 202                 return false;
 203         }
 204
 205         if (page_ref_count(cache->page_cache[cache->head].page) != 1) {
 206                 stats->cache_busy++;
 207                 return false;
 208         }
 209
 210         *dma_info = cache->page_cache[cache->head];
 211         cache->head = (cache->head + 1) & (MLX5E_CACHE_SIZE - 1);
 212         stats->cache_reuse++;
 213
 214         dma_sync_single_for_device(rq->pdev, dma_info->addr,
 215                                    PAGE_SIZE,
 216                                    DMA_FROM_DEVICE);
 217         return true;
 218 }
 219
 220 static inline int mlx5e_page_alloc_mapped(struct mlx5e_rq *rq,
 221                                           struct mlx5e_dma_info *dma_info)
 222 {
 223         if (mlx5e_rx_cache_get(rq, dma_info))
 224                 return 0;
 225
 226         dma_info->page = page_pool_dev_alloc_pages(rq->page_pool);
 227         if (unlikely(!dma_info->page))
 228                 return -ENOMEM;
 229
 230         dma_info->addr = dma_map_page(rq->pdev, dma_info->page, 0,
 231                                       PAGE_SIZE, rq->buff.map_dir);
 232         if (unlikely(dma_mapping_error(rq->pdev, dma_info->addr))) {
 233                 put_page(dma_info->page);
 234                 dma_info->page = NULL;
 235                 return -ENOMEM;
 236         }
 237
 238         return 0;
 239 }
 240
 241 static void mlx5e_page_dma_unmap(struct mlx5e_rq *rq,
 242                                         struct mlx5e_dma_info *dma_info)
 243 {
 244         dma_unmap_page(rq->pdev, dma_info->addr, PAGE_SIZE, rq->buff.map_dir);
 245 }
 246
 247 void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info,
 248                         bool recycle)
 249 {
 250         if (likely(recycle)) {
 251                 if (mlx5e_rx_cache_put(rq, dma_info))
 252                         return;
 253
 254                 mlx5e_page_dma_unmap(rq, dma_info);
 255                 page_pool_recycle_direct(rq->page_pool, dma_info->page);
 256         } else {
 257                 mlx5e_page_dma_unmap(rq, dma_info);
 258                 put_page(dma_info->page);
 259         }
 260 }
 261
 262 static inline int mlx5e_get_rx_frag(struct mlx5e_rq *rq,
 263                                     struct mlx5e_wqe_frag_info *frag)
 264 {
 265         int err = 0;
 266
 267         if (!frag->offset)
 268                 /* On first frag (offset == 0), replenish page (dma_info actually).
 269                  * Other frags that point to the same dma_info (with a different
 270                  * offset) should just use the new one without replenishing again
 271                  * by themselves.
 272                  */
 273                 err = mlx5e_page_alloc_mapped(rq, frag->di);
 274
 275         return err;
 276 }
 277
 278 static inline void mlx5e_put_rx_frag(struct mlx5e_rq *rq,
 279                                      struct mlx5e_wqe_frag_info *frag)
 280 {
 281         if (frag->last_in_page)
 282                 mlx5e_page_release(rq, frag->di, true);
 283 }
 284
 285 static inline struct mlx5e_wqe_frag_info *get_frag(struct mlx5e_rq *rq, u16 ix)
 286 {
 287         return &rq->wqe.frags[ix << rq->wqe.info.log_num_frags];
 288 }
 289
 290 static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe_cyc *wqe,
 291                               u16 ix)
 292 {
 293         struct mlx5e_wqe_frag_info *frag = get_frag(rq, ix);
 294         int err;
 295         int i;
 296
 297         for (i = 0; i < rq->wqe.info.num_frags; i++, frag++) {
 298                 err = mlx5e_get_rx_frag(rq, frag);
 299                 if (unlikely(err))
 300                         goto free_frags;
 301
 302                 wqe->data[i].addr = cpu_to_be64(frag->di->addr +
 303                                                 frag->offset + rq->buff.headroom);
 304         }
 305
 306         return 0;
 307
 308 free_frags:
 309         while (--i >= 0)
 310                 mlx5e_put_rx_frag(rq, --frag);
 311
 312         return err;
 313 }
 314
 315 static inline void mlx5e_free_rx_wqe(struct mlx5e_rq *rq,
 316                                      struct mlx5e_wqe_frag_info *wi)
 317 {
 318         int i;
 319
 320         for (i = 0; i < rq->wqe.info.num_frags; i++, wi++)
 321                 mlx5e_put_rx_frag(rq, wi);
 322 }
 323
 324 void mlx5e_dealloc_rx_wqe(struct mlx5e_rq *rq, u16 ix)
 325 {
 326         struct mlx5e_wqe_frag_info *wi = get_frag(rq, ix);
 327
 328         mlx5e_free_rx_wqe(rq, wi);
 329 }
 330
 331 static int mlx5e_alloc_rx_wqes(struct mlx5e_rq *rq, u16 ix, u8 wqe_bulk)
 332 {
 333         struct mlx5_wq_cyc *wq = &rq->wqe.wq;
 334         int err;
 335         int i;
 336
 337         for (i = 0; i < wqe_bulk; i++) {
 338                 struct mlx5e_rx_wqe_cyc *wqe = mlx5_wq_cyc_get_wqe(wq, ix + i);
 339
 340                 err = mlx5e_alloc_rx_wqe(rq, wqe, ix + i);
 341                 if (unlikely(err))
 342                         goto free_wqes;
 343         }
 344
 345         return 0;
 346
 347 free_wqes:
 348         while (--i >= 0)
 349                 mlx5e_dealloc_rx_wqe(rq, ix + i);
 350
 351         return err;
 352 }
 353
 354 static inline void
 355 mlx5e_add_skb_frag(struct mlx5e_rq *rq, struct sk_buff *skb,
 356                    struct mlx5e_dma_info *di, u32 frag_offset, u32 len,
 357                    unsigned int truesize)
 358 {
 359         dma_sync_single_for_cpu(rq->pdev,
 360                                 di->addr + frag_offset,
 361                                 len, DMA_FROM_DEVICE);
 362         page_ref_inc(di->page);
 363         skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
 364                         di->page, frag_offset, len, truesize);
 365 }
 366
 367 static inline void
 368 mlx5e_copy_skb_header(struct device *pdev, struct sk_buff *skb,
 369                       struct mlx5e_dma_info *dma_info,
 370                       int offset_from, int offset_to, u32 headlen)
 371 {
 372         const void *from = page_address(dma_info->page) + offset_from;
 373         /* Aligning len to sizeof(long) optimizes memcpy performance */
 374         unsigned int len = ALIGN(headlen, sizeof(long));
 375
 376         dma_sync_single_for_cpu(pdev, dma_info->addr + offset_from, len,
 377                                 DMA_FROM_DEVICE);
 378         skb_copy_to_linear_data_offset(skb, offset_to, from, len);
 379 }
 380
 381 static inline void
 382 mlx5e_copy_skb_header_mpwqe(struct device *pdev,
 383                             struct sk_buff *skb,
 384                             struct mlx5e_dma_info *dma_info,
 385                             u32 offset, u32 headlen)
 386 {
 387         u16 headlen_pg = min_t(u32, headlen, PAGE_SIZE - offset);
 388
 389         mlx5e_copy_skb_header(pdev, skb, dma_info, offset, 0, headlen_pg);
 390
 391         if (unlikely(offset + headlen > PAGE_SIZE)) {
 392                 dma_info++;
 393                 mlx5e_copy_skb_header(pdev, skb, dma_info, 0, headlen_pg,
 394                                       headlen - headlen_pg);
 395         }
 396 }
 397
 398 void mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi)
 399 {
 400         const bool no_xdp_xmit =
 401                 bitmap_empty(wi->xdp_xmit_bitmap, MLX5_MPWRQ_PAGES_PER_WQE);
 402         struct mlx5e_dma_info *dma_info = wi->umr.dma_info;
 403         int i;
 404
 405         for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++)
 406                 if (no_xdp_xmit || !test_bit(i, wi->xdp_xmit_bitmap))
 407                         mlx5e_page_release(rq, &dma_info[i], true);
 408 }
 409
 410 static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq)
 411 {
 412         struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
 413         struct mlx5e_rx_wqe_ll *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
 414
 415         rq->mpwqe.umr_in_progress = false;
 416
 417         mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index));
 418
 419         /* ensure wqes are visible to device before updating doorbell record */
 420         dma_wmb();
 421
 422         mlx5_wq_ll_update_db_record(wq);
 423 }
 424
 425 static inline u16 mlx5e_icosq_wrap_cnt(struct mlx5e_icosq *sq)
 426 {
 427         return sq->pc >> MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE;
 428 }
 429
 430 static inline void mlx5e_fill_icosq_frag_edge(struct mlx5e_icosq *sq,
 431                                               struct mlx5_wq_cyc *wq,
 432                                               u16 pi, u16 frag_pi)
 433 {
 434         struct mlx5e_sq_wqe_info *edge_wi, *wi = &sq->db.ico_wqe[pi];
 435         u8 nnops = mlx5_wq_cyc_get_frag_size(wq) - frag_pi;
 436
 437         edge_wi = wi + nnops;
 438
 439         /* fill sq frag edge with nops to avoid wqe wrapping two pages */
 440         for (; wi < edge_wi; wi++) {
 441                 wi->opcode = MLX5_OPCODE_NOP;
 442                 mlx5e_post_nop(wq, sq->sqn, &sq->pc);
 443         }
 444 }
 445
 446 static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 447 {
 448         struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
 449         struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[0];
 450         struct mlx5e_icosq *sq = &rq->channel->icosq;
 451         struct mlx5_wq_cyc *wq = &sq->wq;
 452         struct mlx5e_umr_wqe *umr_wqe;
 453         u16 xlt_offset = ix << (MLX5E_LOG_ALIGNED_MPWQE_PPW - 1);
 454         u16 pi, frag_pi;
 455         int err;
 456         int i;
 457
 458         pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
 459         frag_pi = mlx5_wq_cyc_ctr2fragix(wq, sq->pc);
 460
 461         if (unlikely(frag_pi + MLX5E_UMR_WQEBBS > mlx5_wq_cyc_get_frag_size(wq))) {
 462                 mlx5e_fill_icosq_frag_edge(sq, wq, pi, frag_pi);
 463                 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
 464         }
 465
 466         umr_wqe = mlx5_wq_cyc_get_wqe(wq, pi);
 467         if (unlikely(mlx5e_icosq_wrap_cnt(sq) < 2))
 468                 memcpy(umr_wqe, &rq->mpwqe.umr_wqe,
 469                        offsetof(struct mlx5e_umr_wqe, inline_mtts));
 470
 471         for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++, dma_info++) {
 472                 err = mlx5e_page_alloc_mapped(rq, dma_info);
 473                 if (unlikely(err))
 474                         goto err_unmap;
 475                 umr_wqe->inline_mtts[i].ptag = cpu_to_be64(dma_info->addr | MLX5_EN_WR);
 476         }
 477
 478         bitmap_zero(wi->xdp_xmit_bitmap, MLX5_MPWRQ_PAGES_PER_WQE);
 479         wi->consumed_strides = 0;
 480
 481         rq->mpwqe.umr_in_progress = true;
 482
 483         umr_wqe->ctrl.opmod_idx_opcode =
 484                 cpu_to_be32((sq->pc << MLX5_WQE_CTRL_WQE_INDEX_SHIFT) |
 485                             MLX5_OPCODE_UMR);
 486         umr_wqe->uctrl.xlt_offset = cpu_to_be16(xlt_offset);
 487
 488         sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_UMR;
 489         sq->pc += MLX5E_UMR_WQEBBS;
 490         mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &umr_wqe->ctrl);
 491
 492         return 0;
 493
 494 err_unmap:
 495         while (--i >= 0) {
 496                 dma_info--;
 497                 mlx5e_page_release(rq, dma_info, true);
 498         }
 499         rq->stats->buff_alloc_err++;
 500
 501         return err;
 502 }
 503
 504 void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 505 {
 506         struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
 507
 508         mlx5e_free_rx_mpwqe(rq, wi);
 509 }
 510
 511 bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
 512 {
 513         struct mlx5_wq_cyc *wq = &rq->wqe.wq;
 514         u8 wqe_bulk;
 515         int err;
 516
 517         if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
 518                 return false;
 519
 520         wqe_bulk = rq->wqe.info.wqe_bulk;
 521
 522         if (mlx5_wq_cyc_missing(wq) < wqe_bulk)
 523                 return false;
 524
 525         do {
 526                 u16 head = mlx5_wq_cyc_get_head(wq);
 527
 528                 err = mlx5e_alloc_rx_wqes(rq, head, wqe_bulk);
 529                 if (unlikely(err)) {
 530                         rq->stats->buff_alloc_err++;
 531                         break;
 532                 }
 533
 534                 mlx5_wq_cyc_push_n(wq, wqe_bulk);
 535         } while (mlx5_wq_cyc_missing(wq) >= wqe_bulk);
 536
 537         /* ensure wqes are visible to device before updating doorbell record */
 538         dma_wmb();
 539
 540         mlx5_wq_cyc_update_db_record(wq);
 541
 542         return !!err;
 543 }
 544
 545 static inline void mlx5e_poll_ico_single_cqe(struct mlx5e_cq *cq,
 546                                              struct mlx5e_icosq *sq,
 547                                              struct mlx5e_rq *rq,
 548                                              struct mlx5_cqe64 *cqe)
 549 {
 550         struct mlx5_wq_cyc *wq = &sq->wq;
 551         u16 ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
 552         struct mlx5e_sq_wqe_info *icowi = &sq->db.ico_wqe[ci];
 553
 554         mlx5_cqwq_pop(&cq->wq);
 555
 556         if (unlikely((cqe->op_own >> 4) != MLX5_CQE_REQ)) {
 557                 netdev_WARN_ONCE(cq->channel->netdev,
 558                                  "Bad OP in ICOSQ CQE: 0x%x\n", cqe->op_own);
 559                 return;
 560         }
 561
 562         if (likely(icowi->opcode == MLX5_OPCODE_UMR)) {
 563                 mlx5e_post_rx_mpwqe(rq);
 564                 return;
 565         }
 566
 567         if (unlikely(icowi->opcode != MLX5_OPCODE_NOP))
 568                 netdev_WARN_ONCE(cq->channel->netdev,
 569                                  "Bad OPCODE in ICOSQ WQE info: 0x%x\n", icowi->opcode);
 570 }
 571
 572 static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq)
 573 {
 574         struct mlx5e_icosq *sq = container_of(cq, struct mlx5e_icosq, cq);
 575         struct mlx5_cqe64 *cqe;
 576
 577         if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
 578                 return;
 579
 580         cqe = mlx5_cqwq_get_cqe(&cq->wq);
 581         if (likely(!cqe))
 582                 return;
 583
 584         /* by design, there's only a single cqe */
 585         mlx5e_poll_ico_single_cqe(cq, sq, rq, cqe);
 586
 587         mlx5_cqwq_update_db_record(&cq->wq);
 588 }
 589
 590 bool mlx5e_post_rx_mpwqes(struct mlx5e_rq *rq)
 591 {
 592         struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
 593
 594         if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
 595                 return false;
 596
 597         mlx5e_poll_ico_cq(&rq->channel->icosq.cq, rq);
 598
 599         if (mlx5_wq_ll_is_full(wq))
 600                 return false;
 601
 602         if (!rq->mpwqe.umr_in_progress)
 603                 mlx5e_alloc_rx_mpwqe(rq, wq->head);
 604         else
 605                 rq->stats->congst_umr += mlx5_wq_ll_missing(wq) > 2;
 606
 607         return false;
 608 }
 609
 610 static void mlx5e_lro_update_tcp_hdr(struct mlx5_cqe64 *cqe, struct tcphdr *tcp)
 611 {
 612         u8 l4_hdr_type = get_cqe_l4_hdr_type(cqe);
 613         u8 tcp_ack     = (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA) ||
 614                          (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA);
 615
 616         tcp->check                      = 0;
 617         tcp->psh                        = get_cqe_lro_tcppsh(cqe);
 618
 619         if (tcp_ack) {
 620                 tcp->ack                = 1;
 621                 tcp->ack_seq            = cqe->lro_ack_seq_num;
 622                 tcp->window             = cqe->lro_tcp_win;
 623         }
 624 }
 625
 626 static void mlx5e_lro_update_hdr(struct sk_buff *skb, struct mlx5_cqe64 *cqe,
 627                                  u32 cqe_bcnt)
 628 {
 629         struct ethhdr   *eth = (struct ethhdr *)(skb->data);
 630         struct tcphdr   *tcp;
 631         int network_depth = 0;
 632         __wsum check;
 633         __be16 proto;
 634         u16 tot_len;
 635         void *ip_p;
 636
 637         proto = __vlan_get_protocol(skb, eth->h_proto, &network_depth);
 638
 639         tot_len = cqe_bcnt - network_depth;
 640         ip_p = skb->data + network_depth;
 641
 642         if (proto == htons(ETH_P_IP)) {
 643                 struct iphdr *ipv4 = ip_p;
 644
 645                 tcp = ip_p + sizeof(struct iphdr);
 646                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
 647
 648                 ipv4->ttl               = cqe->lro_min_ttl;
 649                 ipv4->tot_len           = cpu_to_be16(tot_len);
 650                 ipv4->check             = 0;
 651                 ipv4->check             = ip_fast_csum((unsigned char *)ipv4,
 652                                                        ipv4->ihl);
 653
 654                 mlx5e_lro_update_tcp_hdr(cqe, tcp);
 655                 check = csum_partial(tcp, tcp->doff * 4,
 656                                      csum_unfold((__force __sum16)cqe->check_sum));
 657                 /* Almost done, don't forget the pseudo header */
 658                 tcp->check = csum_tcpudp_magic(ipv4->saddr, ipv4->daddr,
 659                                                tot_len - sizeof(struct iphdr),
 660                                                IPPROTO_TCP, check);
 661         } else {
 662                 u16 payload_len = tot_len - sizeof(struct ipv6hdr);
 663                 struct ipv6hdr *ipv6 = ip_p;
 664
 665                 tcp = ip_p + sizeof(struct ipv6hdr);
 666                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
 667
 668                 ipv6->hop_limit         = cqe->lro_min_ttl;
 669                 ipv6->payload_len       = cpu_to_be16(payload_len);
 670
 671                 mlx5e_lro_update_tcp_hdr(cqe, tcp);
 672                 check = csum_partial(tcp, tcp->doff * 4,
 673                                      csum_unfold((__force __sum16)cqe->check_sum));
 674                 /* Almost done, don't forget the pseudo header */
 675                 tcp->check = csum_ipv6_magic(&ipv6->saddr, &ipv6->daddr, payload_len,
 676                                              IPPROTO_TCP, check);
 677         }
 678 }
 679
 680 static inline void mlx5e_skb_set_hash(struct mlx5_cqe64 *cqe,
 681                                       struct sk_buff *skb)
 682 {
 683         u8 cht = cqe->rss_hash_type;
 684         int ht = (cht & CQE_RSS_HTYPE_L4) ? PKT_HASH_TYPE_L4 :
 685                  (cht & CQE_RSS_HTYPE_IP) ? PKT_HASH_TYPE_L3 :
 686                                             PKT_HASH_TYPE_NONE;
 687         skb_set_hash(skb, be32_to_cpu(cqe->rss_hash_result), ht);
 688 }
 689
 690 static inline bool is_last_ethertype_ip(struct sk_buff *skb, int *network_depth)
 691 {
 692         __be16 ethertype = ((struct ethhdr *)skb->data)->h_proto;
 693
 694         ethertype = __vlan_get_protocol(skb, ethertype, network_depth);
 695         return (ethertype == htons(ETH_P_IP) || ethertype == htons(ETH_P_IPV6));
 696 }
 697
 698 static __be32 mlx5e_get_fcs(struct sk_buff *skb)
 699 {
 700         int last_frag_sz, bytes_in_prev, nr_frags;
 701         u8 *fcs_p1, *fcs_p2;
 702         skb_frag_t *last_frag;
 703         __be32 fcs_bytes;
 704
 705         if (!skb_is_nonlinear(skb))
 706                 return *(__be32 *)(skb->data + skb->len - ETH_FCS_LEN);
 707
 708         nr_frags = skb_shinfo(skb)->nr_frags;
 709         last_frag = &skb_shinfo(skb)->frags[nr_frags - 1];
 710         last_frag_sz = skb_frag_size(last_frag);
 711
 712         /* If all FCS data is in last frag */
 713         if (last_frag_sz >= ETH_FCS_LEN)
 714                 return *(__be32 *)(skb_frag_address(last_frag) +
 715                                    last_frag_sz - ETH_FCS_LEN);
 716
 717         fcs_p2 = (u8 *)skb_frag_address(last_frag);
 718         bytes_in_prev = ETH_FCS_LEN - last_frag_sz;
 719
 720         /* Find where the other part of the FCS is - Linear or another frag */
 721         if (nr_frags == 1) {
 722                 fcs_p1 = skb_tail_pointer(skb);
 723         } else {
 724                 skb_frag_t *prev_frag = &skb_shinfo(skb)->frags[nr_frags - 2];
 725
 726                 fcs_p1 = skb_frag_address(prev_frag) +
 727                             skb_frag_size(prev_frag);
 728         }
 729         fcs_p1 -= bytes_in_prev;
 730
 731         memcpy(&fcs_bytes, fcs_p1, bytes_in_prev);
 732         memcpy(((u8 *)&fcs_bytes) + bytes_in_prev, fcs_p2, last_frag_sz);
 733
 734         return fcs_bytes;
 735 }
 736
 737 static inline void mlx5e_handle_csum(struct net_device *netdev,
 738                                      struct mlx5_cqe64 *cqe,
 739                                      struct mlx5e_rq *rq,
 740                                      struct sk_buff *skb,
 741                                      bool   lro)
 742 {
 743         struct mlx5e_rq_stats *stats = rq->stats;
 744         int network_depth = 0;
 745
 746         if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
 747                 goto csum_none;
 748
 749         if (lro) {
 750                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 751                 stats->csum_unnecessary++;
 752                 return;
 753         }
 754
 755         if (likely(is_last_ethertype_ip(skb, &network_depth))) {
 756                 skb->ip_summed = CHECKSUM_COMPLETE;
 757                 skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
 758                 if (network_depth > ETH_HLEN)
 759                         /* CQE csum is calculated from the IP header and does
 760                          * not cover VLAN headers (if present). This will add
 761                          * the checksum manually.
 762                          */
 763                         skb->csum = csum_partial(skb->data + ETH_HLEN,
 764                                                  network_depth - ETH_HLEN,
 765                                                  skb->csum);
 766                 if (unlikely(netdev->features & NETIF_F_RXFCS))
 767                         skb->csum = csum_add(skb->csum,
 768                                              (__force __wsum)mlx5e_get_fcs(skb));
 769                 stats->csum_complete++;
 770                 return;
 771         }
 772
 773         if (likely((cqe->hds_ip_ext & CQE_L3_OK) &&
 774                    (cqe->hds_ip_ext & CQE_L4_OK))) {
 775                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 776                 if (cqe_is_tunneled(cqe)) {
 777                         skb->csum_level = 1;
 778                         skb->encapsulation = 1;
 779                         stats->csum_unnecessary_inner++;
 780                         return;
 781                 }
 782                 stats->csum_unnecessary++;
 783                 return;
 784         }
 785 csum_none:
 786         skb->ip_summed = CHECKSUM_NONE;
 787         stats->csum_none++;
 788 }
 789
 790 static inline void mlx5e_build_rx_skb(struct mlx5_cqe64 *cqe,
 791                                       u32 cqe_bcnt,
 792                                       struct mlx5e_rq *rq,
 793                                       struct sk_buff *skb)
 794 {
 795         u8 lro_num_seg = be32_to_cpu(cqe->srqn) >> 24;
 796         struct mlx5e_rq_stats *stats = rq->stats;
 797         struct net_device *netdev = rq->netdev;
 798
 799         skb->mac_len = ETH_HLEN;
 800         if (lro_num_seg > 1) {
 801                 mlx5e_lro_update_hdr(skb, cqe, cqe_bcnt);
 802                 skb_shinfo(skb)->gso_size = DIV_ROUND_UP(cqe_bcnt, lro_num_seg);
 803                 /* Subtract one since we already counted this as one
 804                  * "regular" packet in mlx5e_complete_rx_cqe()
 805                  */
 806                 stats->packets += lro_num_seg - 1;
 807                 stats->lro_packets++;
 808                 stats->lro_bytes += cqe_bcnt;
 809         }
 810
 811         if (unlikely(mlx5e_rx_hw_stamp(rq->tstamp)))
 812                 skb_hwtstamps(skb)->hwtstamp =
 813                                 mlx5_timecounter_cyc2time(rq->clock, get_cqe_ts(cqe));
 814
 815         skb_record_rx_queue(skb, rq->ix);
 816
 817         if (likely(netdev->features & NETIF_F_RXHASH))
 818                 mlx5e_skb_set_hash(cqe, skb);
 819
 820         if (cqe_has_vlan(cqe)) {
 821                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 822                                        be16_to_cpu(cqe->vlan_info));
 823                 stats->removed_vlan_packets++;
 824         }
 825
 826         skb->mark = be32_to_cpu(cqe->sop_drop_qpn) & MLX5E_TC_FLOW_ID_MASK;
 827
 828         mlx5e_handle_csum(netdev, cqe, rq, skb, !!lro_num_seg);
 829         skb->protocol = eth_type_trans(skb, netdev);
 830 }
 831
 832 static inline void mlx5e_complete_rx_cqe(struct mlx5e_rq *rq,
 833                                          struct mlx5_cqe64 *cqe,
 834                                          u32 cqe_bcnt,
 835                                          struct sk_buff *skb)
 836 {
 837         struct mlx5e_rq_stats *stats = rq->stats;
 838
 839         stats->packets++;
 840         stats->bytes += cqe_bcnt;
 841         mlx5e_build_rx_skb(cqe, cqe_bcnt, rq, skb);
 842 }
 843
 844 static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq)
 845 {
 846         struct mlx5_wq_cyc *wq = &sq->wq;
 847         struct mlx5e_tx_wqe *wqe;
 848         u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc - 1); /* last pi */
 849
 850         wqe  = mlx5_wq_cyc_get_wqe(wq, pi);
 851
 852         mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &wqe->ctrl);
 853 }
 854
 855 static inline bool mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq,
 856                                         struct mlx5e_dma_info *di,
 857                                         const struct xdp_buff *xdp)
 858 {
 859         struct mlx5e_xdpsq       *sq   = &rq->xdpsq;
 860         struct mlx5_wq_cyc       *wq   = &sq->wq;
 861         u16                       pi   = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
 862         struct mlx5e_tx_wqe      *wqe  = mlx5_wq_cyc_get_wqe(wq, pi);
 863
 864         struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl;
 865         struct mlx5_wqe_eth_seg  *eseg = &wqe->eth;
 866         struct mlx5_wqe_data_seg *dseg;
 867
 868         ptrdiff_t data_offset = xdp->data - xdp->data_hard_start;
 869         dma_addr_t dma_addr  = di->addr + data_offset;
 870         unsigned int dma_len = xdp->data_end - xdp->data;
 871
 872         struct mlx5e_rq_stats *stats = rq->stats;
 873
 874         prefetchw(wqe);
 875
 876         if (unlikely(dma_len < MLX5E_XDP_MIN_INLINE || rq->hw_mtu < dma_len)) {
 877                 stats->xdp_drop++;
 878                 return false;
 879         }
 880
 881         if (unlikely(!mlx5e_wqc_has_room_for(wq, sq->cc, sq->pc, 1))) {
 882                 if (sq->db.doorbell) {
 883                         /* SQ is full, ring doorbell */
 884                         mlx5e_xmit_xdp_doorbell(sq);
 885                         sq->db.doorbell = false;
 886                 }
 887                 stats->xdp_tx_full++;
 888                 return false;
 889         }
 890
 891         dma_sync_single_for_device(sq->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE);
 892
 893         cseg->fm_ce_se = 0;
 894
 895         dseg = (struct mlx5_wqe_data_seg *)eseg + 1;
 896
 897         /* copy the inline part if required */
 898         if (sq->min_inline_mode != MLX5_INLINE_MODE_NONE) {
 899                 memcpy(eseg->inline_hdr.start, xdp->data, MLX5E_XDP_MIN_INLINE);
 900                 eseg->inline_hdr.sz = cpu_to_be16(MLX5E_XDP_MIN_INLINE);
 901                 dma_len  -= MLX5E_XDP_MIN_INLINE;
 902                 dma_addr += MLX5E_XDP_MIN_INLINE;
 903                 dseg++;
 904         }
 905
 906         /* write the dma part */
 907         dseg->addr       = cpu_to_be64(dma_addr);
 908         dseg->byte_count = cpu_to_be32(dma_len);
 909
 910         cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_SEND);
 911
 912         /* move page to reference to sq responsibility,
 913          * and mark so it's not put back in page-cache.
 914          */
 915         __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); /* non-atomic */
 916         sq->db.di[pi] = *di;
 917         sq->pc++;
 918
 919         sq->db.doorbell = true;
 920
 921         stats->xdp_tx++;
 922         return true;
 923 }
 924
 925 /* returns true if packet was consumed by xdp */
 926 static inline bool mlx5e_xdp_handle(struct mlx5e_rq *rq,
 927                                     struct mlx5e_dma_info *di,
 928                                     void *va, u16 *rx_headroom, u32 *len)
 929 {
 930         struct bpf_prog *prog = READ_ONCE(rq->xdp_prog);
 931         struct xdp_buff xdp;
 932         u32 act;
 933         int err;
 934
 935         if (!prog)
 936                 return false;
 937
 938         xdp.data = va + *rx_headroom;
 939         xdp_set_data_meta_invalid(&xdp);
 940         xdp.data_end = xdp.data + *len;
 941         xdp.data_hard_start = va;
 942         xdp.rxq = &rq->xdp_rxq;
 943
 944         act = bpf_prog_run_xdp(prog, &xdp);
 945         switch (act) {
 946         case XDP_PASS:
 947                 *rx_headroom = xdp.data - xdp.data_hard_start;
 948                 *len = xdp.data_end - xdp.data;
 949                 return false;
 950         case XDP_TX:
 951                 if (unlikely(!mlx5e_xmit_xdp_frame(rq, di, &xdp)))
 952                         trace_xdp_exception(rq->netdev, prog, act);
 953                 return true;
 954         case XDP_REDIRECT:
 955                 /* When XDP enabled then page-refcnt==1 here */
 956                 err = xdp_do_redirect(rq->netdev, &xdp, prog);
 957                 if (!err) {
 958                         __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags);
 959                         rq->xdpsq.db.redirect_flush = true;
 960                         mlx5e_page_dma_unmap(rq, di);
 961                 }
 962                 return true;
 963         default:
 964                 bpf_warn_invalid_xdp_action(act);
 965         case XDP_ABORTED:
 966                 trace_xdp_exception(rq->netdev, prog, act);
 967         case XDP_DROP:
 968                 rq->stats->xdp_drop++;
 969                 return true;
 970         }
 971 }
 972
 973 static inline
 974 struct sk_buff *mlx5e_build_linear_skb(struct mlx5e_rq *rq, void *va,
 975                                        u32 frag_size, u16 headroom,
 976                                        u32 cqe_bcnt)
 977 {
 978         struct sk_buff *skb = build_skb(va, frag_size);
 979
 980         if (unlikely(!skb)) {
 981                 rq->stats->buff_alloc_err++;
 982                 return NULL;
 983         }
 984
 985         skb_reserve(skb, headroom);
 986         skb_put(skb, cqe_bcnt);
 987
 988         return skb;
 989 }
 990
 991 struct sk_buff *
 992 mlx5e_skb_from_cqe_linear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
 993                           struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt)
 994 {
 995         struct mlx5e_dma_info *di = wi->di;
 996         u16 rx_headroom = rq->buff.headroom;
 997         struct sk_buff *skb;
 998         void *va, *data;
 999         bool consumed;
1000         u32 frag_size;
1001
1002         va             = page_address(di->page) + wi->offset;
1003         data           = va + rx_headroom;
1004         frag_size      = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt);
1005
1006         dma_sync_single_range_for_cpu(rq->pdev, di->addr, wi->offset,
1007                                       frag_size, DMA_FROM_DEVICE);
1008         prefetchw(va); /* xdp_frame data area */
1009         prefetch(data);
1010
1011         if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) {
1012                 rq->stats->wqe_err++;
1013                 return NULL;
1014         }
1015
1016         rcu_read_lock();
1017         consumed = mlx5e_xdp_handle(rq, di, va, &rx_headroom, &cqe_bcnt);
1018         rcu_read_unlock();
1019         if (consumed)
1020                 return NULL; /* page/packet was consumed by XDP */
1021
1022         skb = mlx5e_build_linear_skb(rq, va, frag_size, rx_headroom, cqe_bcnt);
1023         if (unlikely(!skb))
1024                 return NULL;
1025
1026         /* queue up for recycling/reuse */
1027         page_ref_inc(di->page);
1028
1029         return skb;
1030 }
1031
1032 struct sk_buff *
1033 mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
1034                              struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt)
1035 {
1036         struct mlx5e_rq_frag_info *frag_info = &rq->wqe.info.arr[0];
1037         struct mlx5e_wqe_frag_info *head_wi = wi;
1038         u16 headlen      = min_t(u32, MLX5E_RX_MAX_HEAD, cqe_bcnt);
1039         u16 frag_headlen = headlen;
1040         u16 byte_cnt     = cqe_bcnt - headlen;
1041         struct sk_buff *skb;
1042
1043         if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) {
1044                 rq->stats->wqe_err++;
1045                 return NULL;
1046         }
1047
1048         /* XDP is not supported in this configuration, as incoming packets
1049          * might spread among multiple pages.
1050          */
1051         skb = napi_alloc_skb(rq->cq.napi,
1052                              ALIGN(MLX5E_RX_MAX_HEAD, sizeof(long)));
1053         if (unlikely(!skb)) {
1054                 rq->stats->buff_alloc_err++;
1055                 return NULL;
1056         }
1057
1058         prefetchw(skb->data);
1059
1060         while (byte_cnt) {
1061                 u16 frag_consumed_bytes =
1062                         min_t(u16, frag_info->frag_size - frag_headlen, byte_cnt);
1063
1064                 mlx5e_add_skb_frag(rq, skb, wi->di, wi->offset + frag_headlen,
1065                                    frag_consumed_bytes, frag_info->frag_stride);
1066                 byte_cnt -= frag_consumed_bytes;
1067                 frag_headlen = 0;
1068                 frag_info++;
1069                 wi++;
1070         }
1071
1072         /* copy header */
1073         mlx5e_copy_skb_header(rq->pdev, skb, head_wi->di, head_wi->offset,
1074                               0, headlen);
1075         /* skb linear part was allocated with headlen and aligned to long */
1076         skb->tail += headlen;
1077         skb->len  += headlen;
1078
1079         return skb;
1080 }
1081
1082 void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1083 {
1084         struct mlx5_wq_cyc *wq = &rq->wqe.wq;
1085         struct mlx5e_wqe_frag_info *wi;
1086         struct sk_buff *skb;
1087         u32 cqe_bcnt;
1088         u16 ci;
1089
1090         ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
1091         wi       = get_frag(rq, ci);
1092         cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
1093
1094         skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
1095         if (!skb) {
1096                 /* probably for XDP */
1097                 if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
1098                         /* do not return page to cache,
1099                          * it will be returned on XDP_TX completion.
1100                          */
1101                         goto wq_cyc_pop;
1102                 }
1103                 goto free_wqe;
1104         }
1105
1106         mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1107         napi_gro_receive(rq->cq.napi, skb);
1108
1109 free_wqe:
1110         mlx5e_free_rx_wqe(rq, wi);
1111 wq_cyc_pop:
1112         mlx5_wq_cyc_pop(wq);
1113 }
1114
1115 #ifdef CONFIG_MLX5_ESWITCH
1116 void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1117 {
1118         struct net_device *netdev = rq->netdev;
1119         struct mlx5e_priv *priv = netdev_priv(netdev);
1120         struct mlx5e_rep_priv *rpriv  = priv->ppriv;
1121         struct mlx5_eswitch_rep *rep = rpriv->rep;
1122         struct mlx5_wq_cyc *wq = &rq->wqe.wq;
1123         struct mlx5e_wqe_frag_info *wi;
1124         struct sk_buff *skb;
1125         u32 cqe_bcnt;
1126         u16 ci;
1127
1128         ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
1129         wi       = get_frag(rq, ci);
1130         cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
1131
1132         skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
1133         if (!skb) {
1134                 /* probably for XDP */
1135                 if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
1136                         /* do not return page to cache,
1137                          * it will be returned on XDP_TX completion.
1138                          */
1139                         goto wq_cyc_pop;
1140                 }
1141                 goto free_wqe;
1142         }
1143
1144         mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1145
1146         if (rep->vlan && skb_vlan_tag_present(skb))
1147                 skb_vlan_pop(skb);
1148
1149         napi_gro_receive(rq->cq.napi, skb);
1150
1151 free_wqe:
1152         mlx5e_free_rx_wqe(rq, wi);
1153 wq_cyc_pop:
1154         mlx5_wq_cyc_pop(wq);
1155 }
1156 #endif
1157
1158 struct sk_buff *
1159 mlx5e_skb_from_cqe_mpwrq_nonlinear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
1160                                    u16 cqe_bcnt, u32 head_offset, u32 page_idx)
1161 {
1162         u16 headlen = min_t(u16, MLX5E_RX_MAX_HEAD, cqe_bcnt);
1163         struct mlx5e_dma_info *di = &wi->umr.dma_info[page_idx];
1164         u32 frag_offset    = head_offset + headlen;
1165         u32 byte_cnt       = cqe_bcnt - headlen;
1166         struct mlx5e_dma_info *head_di = di;
1167         struct sk_buff *skb;
1168
1169         skb = napi_alloc_skb(rq->cq.napi,
1170                              ALIGN(MLX5E_RX_MAX_HEAD, sizeof(long)));
1171         if (unlikely(!skb)) {
1172                 rq->stats->buff_alloc_err++;
1173                 return NULL;
1174         }
1175
1176         prefetchw(skb->data);
1177
1178         if (unlikely(frag_offset >= PAGE_SIZE)) {
1179                 di++;
1180                 frag_offset -= PAGE_SIZE;
1181         }
1182
1183         while (byte_cnt) {
1184                 u32 pg_consumed_bytes =
1185                         min_t(u32, PAGE_SIZE - frag_offset, byte_cnt);
1186                 unsigned int truesize =
1187                         ALIGN(pg_consumed_bytes, BIT(rq->mpwqe.log_stride_sz));
1188
1189                 mlx5e_add_skb_frag(rq, skb, di, frag_offset,
1190                                    pg_consumed_bytes, truesize);
1191                 byte_cnt -= pg_consumed_bytes;
1192                 frag_offset = 0;
1193                 di++;
1194         }
1195         /* copy header */
1196         mlx5e_copy_skb_header_mpwqe(rq->pdev, skb, head_di,
1197                                     head_offset, headlen);
1198         /* skb linear part was allocated with headlen and aligned to long */
1199         skb->tail += headlen;
1200         skb->len  += headlen;
1201
1202         return skb;
1203 }
1204
1205 struct sk_buff *
1206 mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
1207                                 u16 cqe_bcnt, u32 head_offset, u32 page_idx)
1208 {
1209         struct mlx5e_dma_info *di = &wi->umr.dma_info[page_idx];
1210         u16 rx_headroom = rq->buff.headroom;
1211         u32 cqe_bcnt32 = cqe_bcnt;
1212         struct sk_buff *skb;
1213         void *va, *data;
1214         u32 frag_size;
1215         bool consumed;
1216
1217         va             = page_address(di->page) + head_offset;
1218         data           = va + rx_headroom;
1219         frag_size      = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt32);
1220
1221         dma_sync_single_range_for_cpu(rq->pdev, di->addr, head_offset,
1222                                       frag_size, DMA_FROM_DEVICE);
1223         prefetch(data);
1224
1225         rcu_read_lock();
1226         consumed = mlx5e_xdp_handle(rq, di, va, &rx_headroom, &cqe_bcnt32);
1227         rcu_read_unlock();
1228         if (consumed) {
1229                 if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags))
1230                         __set_bit(page_idx, wi->xdp_xmit_bitmap); /* non-atomic */
1231                 return NULL; /* page/packet was consumed by XDP */
1232         }
1233
1234         skb = mlx5e_build_linear_skb(rq, va, frag_size, rx_headroom, cqe_bcnt32);
1235         if (unlikely(!skb))
1236                 return NULL;
1237
1238         /* queue up for recycling/reuse */
1239         page_ref_inc(di->page);
1240
1241         return skb;
1242 }
1243
1244 void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1245 {
1246         u16 cstrides       = mpwrq_get_cqe_consumed_strides(cqe);
1247         u16 wqe_id         = be16_to_cpu(cqe->wqe_id);
1248         struct mlx5e_mpw_info *wi = &rq->mpwqe.info[wqe_id];
1249         u16 stride_ix      = mpwrq_get_cqe_stride_index(cqe);
1250         u32 wqe_offset     = stride_ix << rq->mpwqe.log_stride_sz;
1251         u32 head_offset    = wqe_offset & (PAGE_SIZE - 1);
1252         u32 page_idx       = wqe_offset >> PAGE_SHIFT;
1253         struct mlx5e_rx_wqe_ll *wqe;
1254         struct mlx5_wq_ll *wq;
1255         struct sk_buff *skb;
1256         u16 cqe_bcnt;
1257
1258         wi->consumed_strides += cstrides;
1259
1260         if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) {
1261                 rq->stats->wqe_err++;
1262                 goto mpwrq_cqe_out;
1263         }
1264
1265         if (unlikely(mpwrq_is_filler_cqe(cqe))) {
1266                 struct mlx5e_rq_stats *stats = rq->stats;
1267
1268                 stats->mpwqe_filler_cqes++;
1269                 stats->mpwqe_filler_strides += cstrides;
1270                 goto mpwrq_cqe_out;
1271         }
1272
1273         cqe_bcnt = mpwrq_get_cqe_byte_cnt(cqe);
1274
1275         skb = rq->mpwqe.skb_from_cqe_mpwrq(rq, wi, cqe_bcnt, head_offset,
1276                                            page_idx);
1277         if (!skb)
1278                 goto mpwrq_cqe_out;
1279
1280         mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1281         napi_gro_receive(rq->cq.napi, skb);
1282
1283 mpwrq_cqe_out:
1284         if (likely(wi->consumed_strides < rq->mpwqe.num_strides))
1285                 return;
1286
1287         wq  = &rq->mpwqe.wq;
1288         wqe = mlx5_wq_ll_get_wqe(wq, wqe_id);
1289         mlx5e_free_rx_mpwqe(rq, wi);
1290         mlx5_wq_ll_pop(wq, cqe->wqe_id, &wqe->next.next_wqe_index);
1291 }
1292
1293 int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
1294 {
1295         struct mlx5e_rq *rq = container_of(cq, struct mlx5e_rq, cq);
1296         struct mlx5e_xdpsq *xdpsq;
1297         struct mlx5_cqe64 *cqe;
1298         int work_done = 0;
1299
1300         if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
1301                 return 0;
1302
1303         if (cq->decmprs_left)
1304                 work_done += mlx5e_decompress_cqes_cont(rq, cq, 0, budget);
1305
1306         cqe = mlx5_cqwq_get_cqe(&cq->wq);
1307         if (!cqe)
1308                 return 0;
1309
1310         xdpsq = &rq->xdpsq;
1311
1312         do {
1313                 if (mlx5_get_cqe_format(cqe) == MLX5_COMPRESSED) {
1314                         work_done +=
1315                                 mlx5e_decompress_cqes_start(rq, cq,
1316                                                             budget - work_done);
1317                         continue;
1318                 }
1319
1320                 mlx5_cqwq_pop(&cq->wq);
1321
1322                 rq->handle_rx_cqe(rq, cqe);
1323         } while ((++work_done < budget) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
1324
1325         if (xdpsq->db.doorbell) {
1326                 mlx5e_xmit_xdp_doorbell(xdpsq);
1327                 xdpsq->db.doorbell = false;
1328         }
1329
1330         if (xdpsq->db.redirect_flush) {
1331                 xdp_do_flush_map();
1332                 xdpsq->db.redirect_flush = false;
1333         }
1334
1335         mlx5_cqwq_update_db_record(&cq->wq);
1336
1337         /* ensure cq space is freed before enabling more cqes */
1338         wmb();
1339
1340         return work_done;
1341 }
1342
1343 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
1344 {
1345         struct mlx5e_xdpsq *sq;
1346         struct mlx5_cqe64 *cqe;
1347         struct mlx5e_rq *rq;
1348         u16 sqcc;
1349         int i;
1350
1351         sq = container_of(cq, struct mlx5e_xdpsq, cq);
1352
1353         if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
1354                 return false;
1355
1356         cqe = mlx5_cqwq_get_cqe(&cq->wq);
1357         if (!cqe)
1358                 return false;
1359
1360         rq = container_of(sq, struct mlx5e_rq, xdpsq);
1361
1362         /* sq->cc must be updated only after mlx5_cqwq_update_db_record(),
1363          * otherwise a cq overrun may occur
1364          */
1365         sqcc = sq->cc;
1366
1367         i = 0;
1368         do {
1369                 u16 wqe_counter;
1370                 bool last_wqe;
1371
1372                 mlx5_cqwq_pop(&cq->wq);
1373
1374                 wqe_counter = be16_to_cpu(cqe->wqe_counter);
1375
1376                 do {
1377                         struct mlx5e_dma_info *di;
1378                         u16 ci;
1379
1380                         last_wqe = (sqcc == wqe_counter);
1381
1382                         ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc);
1383                         di = &sq->db.di[ci];
1384
1385                         sqcc++;
1386                         /* Recycle RX page */
1387                         mlx5e_page_release(rq, di, true);
1388                 } while (!last_wqe);
1389         } while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
1390
1391         rq->stats->xdp_tx_cqe += i;
1392
1393         mlx5_cqwq_update_db_record(&cq->wq);
1394
1395         /* ensure cq space is freed before enabling more cqes */
1396         wmb();
1397
1398         sq->cc = sqcc;
1399         return (i == MLX5E_TX_CQ_POLL_BUDGET);
1400 }
1401
1402 void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
1403 {
1404         struct mlx5e_rq *rq = container_of(sq, struct mlx5e_rq, xdpsq);
1405         struct mlx5e_dma_info *di;
1406         u16 ci;
1407
1408         while (sq->cc != sq->pc) {
1409                 ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->cc);
1410                 di = &sq->db.di[ci];
1411                 sq->cc++;
1412
1413                 mlx5e_page_release(rq, di, false);
1414         }
1415 }
1416
1417 #ifdef CONFIG_MLX5_CORE_IPOIB
1418
1419 #define MLX5_IB_GRH_DGID_OFFSET 24
1420 #define MLX5_GID_SIZE           16
1421
1422 static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq,
1423                                          struct mlx5_cqe64 *cqe,
1424                                          u32 cqe_bcnt,
1425                                          struct sk_buff *skb)
1426 {
1427         struct mlx5e_rq_stats *stats = rq->stats;
1428         struct hwtstamp_config *tstamp;
1429         struct net_device *netdev;
1430         struct mlx5e_priv *priv;
1431         char *pseudo_header;
1432         u32 qpn;
1433         u8 *dgid;
1434         u8 g;
1435
1436         qpn = be32_to_cpu(cqe->sop_drop_qpn) & 0xffffff;
1437         netdev = mlx5i_pkey_get_netdev(rq->netdev, qpn);
1438
1439         /* No mapping present, cannot process SKB. This might happen if a child
1440          * interface is going down while having unprocessed CQEs on parent RQ
1441          */
1442         if (unlikely(!netdev)) {
1443                 /* TODO: add drop counters support */
1444                 skb->dev = NULL;
1445                 pr_warn_once("Unable to map QPN %u to dev - dropping skb\n", qpn);
1446                 return;
1447         }
1448
1449         priv = mlx5i_epriv(netdev);
1450         tstamp = &priv->tstamp;
1451
1452         g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
1453         dgid = skb->data + MLX5_IB_GRH_DGID_OFFSET;
1454         if ((!g) || dgid[0] != 0xff)
1455                 skb->pkt_type = PACKET_HOST;
1456         else if (memcmp(dgid, netdev->broadcast + 4, MLX5_GID_SIZE) == 0)
1457                 skb->pkt_type = PACKET_BROADCAST;
1458         else
1459                 skb->pkt_type = PACKET_MULTICAST;
1460
1461         /* TODO: IB/ipoib: Allow mcast packets from other VFs
1462          * 68996a6e760e5c74654723eeb57bf65628ae87f4
1463          */
1464
1465         skb_pull(skb, MLX5_IB_GRH_BYTES);
1466
1467         skb->protocol = *((__be16 *)(skb->data));
1468
1469         skb->ip_summed = CHECKSUM_COMPLETE;
1470         skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
1471
1472         if (unlikely(mlx5e_rx_hw_stamp(tstamp)))
1473                 skb_hwtstamps(skb)->hwtstamp =
1474                                 mlx5_timecounter_cyc2time(rq->clock, get_cqe_ts(cqe));
1475
1476         skb_record_rx_queue(skb, rq->ix);
1477
1478         if (likely(netdev->features & NETIF_F_RXHASH))
1479                 mlx5e_skb_set_hash(cqe, skb);
1480
1481         /* 20 bytes of ipoib header and 4 for encap existing */
1482         pseudo_header = skb_push(skb, MLX5_IPOIB_PSEUDO_LEN);
1483         memset(pseudo_header, 0, MLX5_IPOIB_PSEUDO_LEN);
1484         skb_reset_mac_header(skb);
1485         skb_pull(skb, MLX5_IPOIB_HARD_LEN);
1486
1487         skb->dev = netdev;
1488
1489         stats->csum_complete++;
1490         stats->packets++;
1491         stats->bytes += cqe_bcnt;
1492 }
1493
1494 void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1495 {
1496         struct mlx5_wq_cyc *wq = &rq->wqe.wq;
1497         struct mlx5e_wqe_frag_info *wi;
1498         struct sk_buff *skb;
1499         u32 cqe_bcnt;
1500         u16 ci;
1501
1502         ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
1503         wi       = get_frag(rq, ci);
1504         cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
1505
1506         skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
1507         if (!skb)
1508                 goto wq_free_wqe;
1509
1510         mlx5i_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1511         if (unlikely(!skb->dev)) {
1512                 dev_kfree_skb_any(skb);
1513                 goto wq_free_wqe;
1514         }
1515         napi_gro_receive(rq->cq.napi, skb);
1516
1517 wq_free_wqe:
1518         mlx5e_free_rx_wqe(rq, wi);
1519         mlx5_wq_cyc_pop(wq);
1520 }
1521
1522 #endif /* CONFIG_MLX5_CORE_IPOIB */
1523
1524 #ifdef CONFIG_MLX5_EN_IPSEC
1525
1526 void mlx5e_ipsec_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1527 {
1528         struct mlx5_wq_cyc *wq = &rq->wqe.wq;
1529         struct mlx5e_wqe_frag_info *wi;
1530         struct sk_buff *skb;
1531         u32 cqe_bcnt;
1532         u16 ci;
1533
1534         ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
1535         wi       = get_frag(rq, ci);
1536         cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
1537
1538         skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
1539         if (unlikely(!skb)) {
1540                 /* a DROP, save the page-reuse checks */
1541                 mlx5e_free_rx_wqe(rq, wi);
1542                 goto wq_cyc_pop;
1543         }
1544         skb = mlx5e_ipsec_handle_rx_skb(rq->netdev, skb);
1545         if (unlikely(!skb)) {
1546                 mlx5e_free_rx_wqe(rq, wi);
1547                 goto wq_cyc_pop;
1548         }
1549
1550         mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1551         napi_gro_receive(rq->cq.napi, skb);
1552
1553         mlx5e_free_rx_wqe(rq, wi);
1554 wq_cyc_pop:
1555         mlx5_wq_cyc_pop(wq);
1556 }
1557
1558 #endif /* CONFIG_MLX5_EN_IPSEC */