net/mlx5e: Rx, Fixup skb checksum for packets with tail padding

[thirdparty/linux.git] / drivers / net / ethernet / mellanox / mlx5 / core / en_rx.c

/*
 * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/prefetch.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <net/ip6_checksum.h>
#include <net/page_pool.h>
#include <net/inet_ecn.h>
#include "en.h"
#include "en_tc.h"
#include "eswitch.h"
#include "en_rep.h"
#include "ipoib/ipoib.h"
#include "en_accel/ipsec_rxtx.h"
#include "en_accel/tls_rxtx.h"
#include "lib/clock.h"
#include "en/xdp.h"

static inline bool mlx5e_rx_hw_stamp(struct hwtstamp_config *config)
{
        return config->rx_filter == HWTSTAMP_FILTER_ALL;
}

static inline void mlx5e_read_cqe_slot(struct mlx5_cqwq *wq,
                                       u32 cqcc, void *data)
{
        u32 ci = mlx5_cqwq_ctr2ix(wq, cqcc);

        memcpy(data, mlx5_cqwq_get_wqe(wq, ci), sizeof(struct mlx5_cqe64));
}

static inline void mlx5e_read_title_slot(struct mlx5e_rq *rq,
                                         struct mlx5_cqwq *wq,
                                         u32 cqcc)
{
        struct mlx5e_cq_decomp *cqd = &rq->cqd;
        struct mlx5_cqe64 *title = &cqd->title;

        mlx5e_read_cqe_slot(wq, cqcc, title);
        cqd->left        = be32_to_cpu(title->byte_cnt);
        cqd->wqe_counter = be16_to_cpu(title->wqe_counter);
        rq->stats->cqe_compress_blks++;
}

static inline void mlx5e_read_mini_arr_slot(struct mlx5_cqwq *wq,
                                            struct mlx5e_cq_decomp *cqd,
                                            u32 cqcc)
{
        mlx5e_read_cqe_slot(wq, cqcc, cqd->mini_arr);
        cqd->mini_arr_idx = 0;
}

static inline void mlx5e_cqes_update_owner(struct mlx5_cqwq *wq, int n)
{
        u32 cqcc   = wq->cc;
        u8  op_own = mlx5_cqwq_get_ctr_wrap_cnt(wq, cqcc) & 1;
        u32 ci     = mlx5_cqwq_ctr2ix(wq, cqcc);
        u32 wq_sz  = mlx5_cqwq_get_size(wq);
        u32 ci_top = min_t(u32, wq_sz, ci + n);

        for (; ci < ci_top; ci++, n--) {
                struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);

                cqe->op_own = op_own;
        }

        if (unlikely(ci == wq_sz)) {
                op_own = !op_own;
                for (ci = 0; ci < n; ci++) {
                        struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci);

                        cqe->op_own = op_own;
                }
        }
}

static inline void mlx5e_decompress_cqe(struct mlx5e_rq *rq,
                                        struct mlx5_cqwq *wq,
                                        u32 cqcc)
{
        struct mlx5e_cq_decomp *cqd = &rq->cqd;
        struct mlx5_mini_cqe8 *mini_cqe = &cqd->mini_arr[cqd->mini_arr_idx];
        struct mlx5_cqe64 *title = &cqd->title;

        title->byte_cnt     = mini_cqe->byte_cnt;
        title->check_sum    = mini_cqe->checksum;
        title->op_own      &= 0xf0;
        title->op_own      |= 0x01 & (cqcc >> wq->fbc.log_sz);
        title->wqe_counter  = cpu_to_be16(cqd->wqe_counter);

        if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ)
                cqd->wqe_counter += mpwrq_get_cqe_consumed_strides(title);
        else
                cqd->wqe_counter =
                        mlx5_wq_cyc_ctr2ix(&rq->wqe.wq, cqd->wqe_counter + 1);
}

static inline void mlx5e_decompress_cqe_no_hash(struct mlx5e_rq *rq,
                                                struct mlx5_cqwq *wq,
                                                u32 cqcc)
{
        struct mlx5e_cq_decomp *cqd = &rq->cqd;

        mlx5e_decompress_cqe(rq, wq, cqcc);
        cqd->title.rss_hash_type   = 0;
        cqd->title.rss_hash_result = 0;
}

static inline u32 mlx5e_decompress_cqes_cont(struct mlx5e_rq *rq,
                                             struct mlx5_cqwq *wq,
                                             int update_owner_only,
                                             int budget_rem)
{
        struct mlx5e_cq_decomp *cqd = &rq->cqd;
        u32 cqcc = wq->cc + update_owner_only;
        u32 cqe_count;
        u32 i;

        cqe_count = min_t(u32, cqd->left, budget_rem);

        for (i = update_owner_only; i < cqe_count;
             i++, cqd->mini_arr_idx++, cqcc++) {
                if (cqd->mini_arr_idx == MLX5_MINI_CQE_ARRAY_SIZE)
                        mlx5e_read_mini_arr_slot(wq, cqd, cqcc);

                mlx5e_decompress_cqe_no_hash(rq, wq, cqcc);
                rq->handle_rx_cqe(rq, &cqd->title);
        }
        mlx5e_cqes_update_owner(wq, cqcc - wq->cc);
        wq->cc = cqcc;
        cqd->left -= cqe_count;
        rq->stats->cqe_compress_pkts += cqe_count;

        return cqe_count;
}

static inline u32 mlx5e_decompress_cqes_start(struct mlx5e_rq *rq,
                                              struct mlx5_cqwq *wq,
                                              int budget_rem)
{
        struct mlx5e_cq_decomp *cqd = &rq->cqd;
        u32 cc = wq->cc;

        mlx5e_read_title_slot(rq, wq, cc);
        mlx5e_read_mini_arr_slot(wq, cqd, cc + 1);
        mlx5e_decompress_cqe(rq, wq, cc);
        rq->handle_rx_cqe(rq, &cqd->title);
        cqd->mini_arr_idx++;

        return mlx5e_decompress_cqes_cont(rq, wq, 1, budget_rem) - 1;
}

static inline bool mlx5e_page_is_reserved(struct page *page)
{
        return page_is_pfmemalloc(page) || page_to_nid(page) != numa_mem_id();
}

static inline bool mlx5e_rx_cache_put(struct mlx5e_rq *rq,
                                      struct mlx5e_dma_info *dma_info)
{
        struct mlx5e_page_cache *cache = &rq->page_cache;
        u32 tail_next = (cache->tail + 1) & (MLX5E_CACHE_SIZE - 1);
        struct mlx5e_rq_stats *stats = rq->stats;

        if (tail_next == cache->head) {
                stats->cache_full++;
                return false;
        }

        if (unlikely(mlx5e_page_is_reserved(dma_info->page))) {
                stats->cache_waive++;
                return false;
        }

        cache->page_cache[cache->tail] = *dma_info;
        cache->tail = tail_next;
        return true;
}

static inline bool mlx5e_rx_cache_get(struct mlx5e_rq *rq,
                                      struct mlx5e_dma_info *dma_info)
{
        struct mlx5e_page_cache *cache = &rq->page_cache;
        struct mlx5e_rq_stats *stats = rq->stats;

        if (unlikely(cache->head == cache->tail)) {
                stats->cache_empty++;
                return false;
        }

        if (page_ref_count(cache->page_cache[cache->head].page) != 1) {
                stats->cache_busy++;
                return false;
        }

        *dma_info = cache->page_cache[cache->head];
        cache->head = (cache->head + 1) & (MLX5E_CACHE_SIZE - 1);
        stats->cache_reuse++;

        dma_sync_single_for_device(rq->pdev, dma_info->addr,
                                   PAGE_SIZE,
                                   DMA_FROM_DEVICE);
        return true;
}

static inline int mlx5e_page_alloc_mapped(struct mlx5e_rq *rq,
                                          struct mlx5e_dma_info *dma_info)
{
        if (mlx5e_rx_cache_get(rq, dma_info))
                return 0;

        dma_info->page = page_pool_dev_alloc_pages(rq->page_pool);
        if (unlikely(!dma_info->page))
                return -ENOMEM;

        dma_info->addr = dma_map_page(rq->pdev, dma_info->page, 0,
                                      PAGE_SIZE, rq->buff.map_dir);
        if (unlikely(dma_mapping_error(rq->pdev, dma_info->addr))) {
                put_page(dma_info->page);
                dma_info->page = NULL;
                return -ENOMEM;
        }

        return 0;
}

void mlx5e_page_dma_unmap(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info)
{
        dma_unmap_page(rq->pdev, dma_info->addr, PAGE_SIZE, rq->buff.map_dir);
}

void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info,
                        bool recycle)
{
        if (likely(recycle)) {
                if (mlx5e_rx_cache_put(rq, dma_info))
                        return;

                mlx5e_page_dma_unmap(rq, dma_info);
                page_pool_recycle_direct(rq->page_pool, dma_info->page);
        } else {
                mlx5e_page_dma_unmap(rq, dma_info);
                put_page(dma_info->page);
        }
}

static inline int mlx5e_get_rx_frag(struct mlx5e_rq *rq,
                                    struct mlx5e_wqe_frag_info *frag)
{
        int err = 0;

        if (!frag->offset)
                /* On first frag (offset == 0), replenish page (dma_info actually).
                 * Other frags that point to the same dma_info (with a different
                 * offset) should just use the new one without replenishing again
                 * by themselves.
                 */
                err = mlx5e_page_alloc_mapped(rq, frag->di);

        return err;
}

static inline void mlx5e_put_rx_frag(struct mlx5e_rq *rq,
                                     struct mlx5e_wqe_frag_info *frag,
                                     bool recycle)
{
        if (frag->last_in_page)
                mlx5e_page_release(rq, frag->di, recycle);
}

static inline struct mlx5e_wqe_frag_info *get_frag(struct mlx5e_rq *rq, u16 ix)
{
        return &rq->wqe.frags[ix << rq->wqe.info.log_num_frags];
}

static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe_cyc *wqe,
                              u16 ix)
{
        struct mlx5e_wqe_frag_info *frag = get_frag(rq, ix);
        int err;
        int i;

        for (i = 0; i < rq->wqe.info.num_frags; i++, frag++) {
                err = mlx5e_get_rx_frag(rq, frag);
                if (unlikely(err))
                        goto free_frags;

                wqe->data[i].addr = cpu_to_be64(frag->di->addr +
                                                frag->offset + rq->buff.headroom);
        }

        return 0;

free_frags:
        while (--i >= 0)
                mlx5e_put_rx_frag(rq, --frag, true);

        return err;
}

static inline void mlx5e_free_rx_wqe(struct mlx5e_rq *rq,
                                     struct mlx5e_wqe_frag_info *wi,
                                     bool recycle)
{
        int i;

        for (i = 0; i < rq->wqe.info.num_frags; i++, wi++)
                mlx5e_put_rx_frag(rq, wi, recycle);
}

void mlx5e_dealloc_rx_wqe(struct mlx5e_rq *rq, u16 ix)
{
        struct mlx5e_wqe_frag_info *wi = get_frag(rq, ix);

        mlx5e_free_rx_wqe(rq, wi, false);
}

static int mlx5e_alloc_rx_wqes(struct mlx5e_rq *rq, u16 ix, u8 wqe_bulk)
{
        struct mlx5_wq_cyc *wq = &rq->wqe.wq;
        int err;
        int i;

        for (i = 0; i < wqe_bulk; i++) {
                struct mlx5e_rx_wqe_cyc *wqe = mlx5_wq_cyc_get_wqe(wq, ix + i);

                err = mlx5e_alloc_rx_wqe(rq, wqe, ix + i);
                if (unlikely(err))
                        goto free_wqes;
        }

        return 0;

free_wqes:
        while (--i >= 0)
                mlx5e_dealloc_rx_wqe(rq, ix + i);

        return err;
}

static inline void
mlx5e_add_skb_frag(struct mlx5e_rq *rq, struct sk_buff *skb,
                   struct mlx5e_dma_info *di, u32 frag_offset, u32 len,
                   unsigned int truesize)
{
        dma_sync_single_for_cpu(rq->pdev,
                                di->addr + frag_offset,
                                len, DMA_FROM_DEVICE);
        page_ref_inc(di->page);
        skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
                        di->page, frag_offset, len, truesize);
}

static inline void
mlx5e_copy_skb_header(struct device *pdev, struct sk_buff *skb,
                      struct mlx5e_dma_info *dma_info,
                      int offset_from, u32 headlen)
{
        const void *from = page_address(dma_info->page) + offset_from;
        /* Aligning len to sizeof(long) optimizes memcpy performance */
        unsigned int len = ALIGN(headlen, sizeof(long));

        dma_sync_single_for_cpu(pdev, dma_info->addr + offset_from, len,
                                DMA_FROM_DEVICE);
        skb_copy_to_linear_data(skb, from, len);
}

static void
mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi, bool recycle)
{
        const bool no_xdp_xmit =
                bitmap_empty(wi->xdp_xmit_bitmap, MLX5_MPWRQ_PAGES_PER_WQE);
        struct mlx5e_dma_info *dma_info = wi->umr.dma_info;
        int i;

        for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++)
                if (no_xdp_xmit || !test_bit(i, wi->xdp_xmit_bitmap))
                        mlx5e_page_release(rq, &dma_info[i], recycle);
}

static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq)
{
        struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
        struct mlx5e_rx_wqe_ll *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);

        rq->mpwqe.umr_in_progress = false;

        mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index));

        /* ensure wqes are visible to device before updating doorbell record */
        dma_wmb();

        mlx5_wq_ll_update_db_record(wq);
}

static inline u16 mlx5e_icosq_wrap_cnt(struct mlx5e_icosq *sq)
{
        return sq->pc >> MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE;
}

static inline void mlx5e_fill_icosq_frag_edge(struct mlx5e_icosq *sq,
                                              struct mlx5_wq_cyc *wq,
                                              u16 pi, u16 nnops)
{
        struct mlx5e_sq_wqe_info *edge_wi, *wi = &sq->db.ico_wqe[pi];

        edge_wi = wi + nnops;

        /* fill sq frag edge with nops to avoid wqe wrapping two pages */
        for (; wi < edge_wi; wi++) {
                wi->opcode = MLX5_OPCODE_NOP;
                mlx5e_post_nop(wq, sq->sqn, &sq->pc);
        }
}

static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
{
        struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
        struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[0];
        struct mlx5e_icosq *sq = &rq->channel->icosq;
        struct mlx5_wq_cyc *wq = &sq->wq;
        struct mlx5e_umr_wqe *umr_wqe;
        u16 xlt_offset = ix << (MLX5E_LOG_ALIGNED_MPWQE_PPW - 1);
        u16 pi, contig_wqebbs_room;
        int err;
        int i;

        pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
        contig_wqebbs_room = mlx5_wq_cyc_get_contig_wqebbs(wq, pi);
        if (unlikely(contig_wqebbs_room < MLX5E_UMR_WQEBBS)) {
                mlx5e_fill_icosq_frag_edge(sq, wq, pi, contig_wqebbs_room);
                pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
        }

        umr_wqe = mlx5_wq_cyc_get_wqe(wq, pi);
        if (unlikely(mlx5e_icosq_wrap_cnt(sq) < 2))
                memcpy(umr_wqe, &rq->mpwqe.umr_wqe,
                       offsetof(struct mlx5e_umr_wqe, inline_mtts));

        for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++, dma_info++) {
                err = mlx5e_page_alloc_mapped(rq, dma_info);
                if (unlikely(err))
                        goto err_unmap;
                umr_wqe->inline_mtts[i].ptag = cpu_to_be64(dma_info->addr | MLX5_EN_WR);
        }

        bitmap_zero(wi->xdp_xmit_bitmap, MLX5_MPWRQ_PAGES_PER_WQE);
        wi->consumed_strides = 0;

        rq->mpwqe.umr_in_progress = true;

        umr_wqe->ctrl.opmod_idx_opcode =
                cpu_to_be32((sq->pc << MLX5_WQE_CTRL_WQE_INDEX_SHIFT) |
                            MLX5_OPCODE_UMR);
        umr_wqe->uctrl.xlt_offset = cpu_to_be16(xlt_offset);

        sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_UMR;
        sq->pc += MLX5E_UMR_WQEBBS;
        mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &umr_wqe->ctrl);

        return 0;

err_unmap:
        while (--i >= 0) {
                dma_info--;
                mlx5e_page_release(rq, dma_info, true);
        }
        rq->stats->buff_alloc_err++;

        return err;
}

void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
{
        struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
        /* Don't recycle, this function is called on rq/netdev close */
        mlx5e_free_rx_mpwqe(rq, wi, false);
}

bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
{
        struct mlx5_wq_cyc *wq = &rq->wqe.wq;
        u8 wqe_bulk;
        int err;

        if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
                return false;

        wqe_bulk = rq->wqe.info.wqe_bulk;

        if (mlx5_wq_cyc_missing(wq) < wqe_bulk)
                return false;

        do {
                u16 head = mlx5_wq_cyc_get_head(wq);

                err = mlx5e_alloc_rx_wqes(rq, head, wqe_bulk);
                if (unlikely(err)) {
                        rq->stats->buff_alloc_err++;
                        break;
                }

                mlx5_wq_cyc_push_n(wq, wqe_bulk);
        } while (mlx5_wq_cyc_missing(wq) >= wqe_bulk);

        /* ensure wqes are visible to device before updating doorbell record */
        dma_wmb();

        mlx5_wq_cyc_update_db_record(wq);

        return !!err;
}

static inline void mlx5e_poll_ico_single_cqe(struct mlx5e_cq *cq,
                                             struct mlx5e_icosq *sq,
                                             struct mlx5e_rq *rq,
                                             struct mlx5_cqe64 *cqe)
{
        struct mlx5_wq_cyc *wq = &sq->wq;
        u16 ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
        struct mlx5e_sq_wqe_info *icowi = &sq->db.ico_wqe[ci];

        mlx5_cqwq_pop(&cq->wq);

        if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) {
                netdev_WARN_ONCE(cq->channel->netdev,
                                 "Bad OP in ICOSQ CQE: 0x%x\n", get_cqe_opcode(cqe));
                return;
        }

        if (likely(icowi->opcode == MLX5_OPCODE_UMR)) {
                mlx5e_post_rx_mpwqe(rq);
                return;
        }

        if (unlikely(icowi->opcode != MLX5_OPCODE_NOP))
                netdev_WARN_ONCE(cq->channel->netdev,
                                 "Bad OPCODE in ICOSQ WQE info: 0x%x\n", icowi->opcode);
}

static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq)
{
        struct mlx5e_icosq *sq = container_of(cq, struct mlx5e_icosq, cq);
        struct mlx5_cqe64 *cqe;

        if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
                return;

        cqe = mlx5_cqwq_get_cqe(&cq->wq);
        if (likely(!cqe))
                return;

        /* by design, there's only a single cqe */
        mlx5e_poll_ico_single_cqe(cq, sq, rq, cqe);

        mlx5_cqwq_update_db_record(&cq->wq);
}

bool mlx5e_post_rx_mpwqes(struct mlx5e_rq *rq)
{
        struct mlx5_wq_ll *wq = &rq->mpwqe.wq;

        if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
                return false;

        mlx5e_poll_ico_cq(&rq->channel->icosq.cq, rq);

        if (mlx5_wq_ll_is_full(wq))
                return false;

        if (!rq->mpwqe.umr_in_progress)
                mlx5e_alloc_rx_mpwqe(rq, wq->head);
        else
                rq->stats->congst_umr += mlx5_wq_ll_missing(wq) > 2;

        return false;
}

static void mlx5e_lro_update_tcp_hdr(struct mlx5_cqe64 *cqe, struct tcphdr *tcp)
{
        u8 l4_hdr_type = get_cqe_l4_hdr_type(cqe);
        u8 tcp_ack     = (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA) ||
                         (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA);

        tcp->check                      = 0;
        tcp->psh                        = get_cqe_lro_tcppsh(cqe);

        if (tcp_ack) {
                tcp->ack                = 1;
                tcp->ack_seq            = cqe->lro_ack_seq_num;
                tcp->window             = cqe->lro_tcp_win;
        }
}

static void mlx5e_lro_update_hdr(struct sk_buff *skb, struct mlx5_cqe64 *cqe,
                                 u32 cqe_bcnt)
{
        struct ethhdr   *eth = (struct ethhdr *)(skb->data);
        struct tcphdr   *tcp;
        int network_depth = 0;
        __wsum check;
        __be16 proto;
        u16 tot_len;
        void *ip_p;

        proto = __vlan_get_protocol(skb, eth->h_proto, &network_depth);

        tot_len = cqe_bcnt - network_depth;
        ip_p = skb->data + network_depth;

        if (proto == htons(ETH_P_IP)) {
                struct iphdr *ipv4 = ip_p;

                tcp = ip_p + sizeof(struct iphdr);
                skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;

                ipv4->ttl               = cqe->lro_min_ttl;
                ipv4->tot_len           = cpu_to_be16(tot_len);
                ipv4->check             = 0;
                ipv4->check             = ip_fast_csum((unsigned char *)ipv4,
                                                       ipv4->ihl);

                mlx5e_lro_update_tcp_hdr(cqe, tcp);
                check = csum_partial(tcp, tcp->doff * 4,
                                     csum_unfold((__force __sum16)cqe->check_sum));
                /* Almost done, don't forget the pseudo header */
                tcp->check = csum_tcpudp_magic(ipv4->saddr, ipv4->daddr,
                                               tot_len - sizeof(struct iphdr),
                                               IPPROTO_TCP, check);
        } else {
                u16 payload_len = tot_len - sizeof(struct ipv6hdr);
                struct ipv6hdr *ipv6 = ip_p;

                tcp = ip_p + sizeof(struct ipv6hdr);
                skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;

                ipv6->hop_limit         = cqe->lro_min_ttl;
                ipv6->payload_len       = cpu_to_be16(payload_len);

                mlx5e_lro_update_tcp_hdr(cqe, tcp);
                check = csum_partial(tcp, tcp->doff * 4,
                                     csum_unfold((__force __sum16)cqe->check_sum));
                /* Almost done, don't forget the pseudo header */
                tcp->check = csum_ipv6_magic(&ipv6->saddr, &ipv6->daddr, payload_len,
                                             IPPROTO_TCP, check);
        }
}

static inline void mlx5e_skb_set_hash(struct mlx5_cqe64 *cqe,
                                      struct sk_buff *skb)
{
        u8 cht = cqe->rss_hash_type;
        int ht = (cht & CQE_RSS_HTYPE_L4) ? PKT_HASH_TYPE_L4 :
                 (cht & CQE_RSS_HTYPE_IP) ? PKT_HASH_TYPE_L3 :
                                            PKT_HASH_TYPE_NONE;
        skb_set_hash(skb, be32_to_cpu(cqe->rss_hash_result), ht);
}

static inline bool is_last_ethertype_ip(struct sk_buff *skb, int *network_depth,
                                        __be16 *proto)
{
        *proto = ((struct ethhdr *)skb->data)->h_proto;
        *proto = __vlan_get_protocol(skb, *proto, network_depth);
        return (*proto == htons(ETH_P_IP) || *proto == htons(ETH_P_IPV6));
}

static inline void mlx5e_enable_ecn(struct mlx5e_rq *rq, struct sk_buff *skb)
{
        int network_depth = 0;
        __be16 proto;
        void *ip;
        int rc;

        if (unlikely(!is_last_ethertype_ip(skb, &network_depth, &proto)))
                return;

        ip = skb->data + network_depth;
        rc = ((proto == htons(ETH_P_IP)) ? IP_ECN_set_ce((struct iphdr *)ip) :
                                         IP6_ECN_set_ce(skb, (struct ipv6hdr *)ip));

        rq->stats->ecn_mark += !!rc;
}

static u8 get_ip_proto(struct sk_buff *skb, int network_depth, __be16 proto)
{
        void *ip_p = skb->data + network_depth;

        return (proto == htons(ETH_P_IP)) ? ((struct iphdr *)ip_p)->protocol :
                                            ((struct ipv6hdr *)ip_p)->nexthdr;
}

#define short_frame(size) ((size) <= ETH_ZLEN + ETH_FCS_LEN)

#define MAX_PADDING 8

static void
tail_padding_csum_slow(struct sk_buff *skb, int offset, int len,
                       struct mlx5e_rq_stats *stats)
{
        stats->csum_complete_tail_slow++;
        skb->csum = csum_block_add(skb->csum,
                                   skb_checksum(skb, offset, len, 0),
                                   offset);
}

static void
tail_padding_csum(struct sk_buff *skb, int offset,
                  struct mlx5e_rq_stats *stats)
{
        u8 tail_padding[MAX_PADDING];
        int len = skb->len - offset;
        void *tail;

        if (unlikely(len > MAX_PADDING)) {
                tail_padding_csum_slow(skb, offset, len, stats);
                return;
        }

        tail = skb_header_pointer(skb, offset, len, tail_padding);
        if (unlikely(!tail)) {
                tail_padding_csum_slow(skb, offset, len, stats);
                return;
        }

        stats->csum_complete_tail++;
        skb->csum = csum_block_add(skb->csum, csum_partial(tail, len, 0), offset);
}

static void
mlx5e_skb_padding_csum(struct sk_buff *skb, int network_depth, __be16 proto,
                       struct mlx5e_rq_stats *stats)
{
        struct ipv6hdr *ip6;
        struct iphdr   *ip4;
        int pkt_len;

        switch (proto) {
        case htons(ETH_P_IP):
                ip4 = (struct iphdr *)(skb->data + network_depth);
                pkt_len = network_depth + ntohs(ip4->tot_len);
                break;
        case htons(ETH_P_IPV6):
                ip6 = (struct ipv6hdr *)(skb->data + network_depth);
                pkt_len = network_depth + sizeof(*ip6) + ntohs(ip6->payload_len);
                break;
        default:
                return;
        }

        if (likely(pkt_len >= skb->len))
                return;

        tail_padding_csum(skb, pkt_len, stats);
}

static inline void mlx5e_handle_csum(struct net_device *netdev,
                                     struct mlx5_cqe64 *cqe,
                                     struct mlx5e_rq *rq,
                                     struct sk_buff *skb,
                                     bool   lro)
{
        struct mlx5e_rq_stats *stats = rq->stats;
        int network_depth = 0;
        __be16 proto;

        if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
                goto csum_none;

        if (lro) {
                skb->ip_summed = CHECKSUM_UNNECESSARY;
                stats->csum_unnecessary++;
                return;
        }

        /* True when explicitly set via priv flag, or XDP prog is loaded */
        if (test_bit(MLX5E_RQ_STATE_NO_CSUM_COMPLETE, &rq->state))
                goto csum_unnecessary;

        /* CQE csum doesn't cover padding octets in short ethernet
         * frames. And the pad field is appended prior to calculating
         * and appending the FCS field.
         *
         * Detecting these padded frames requires to verify and parse
         * IP headers, so we simply force all those small frames to be
         * CHECKSUM_UNNECESSARY even if they are not padded.
         */
        if (short_frame(skb->len))
                goto csum_unnecessary;

        if (likely(is_last_ethertype_ip(skb, &network_depth, &proto))) {
                if (unlikely(get_ip_proto(skb, network_depth, proto) == IPPROTO_SCTP))
                        goto csum_unnecessary;

                skb->ip_summed = CHECKSUM_COMPLETE;
                skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
                if (network_depth > ETH_HLEN)
                        /* CQE csum is calculated from the IP header and does
                         * not cover VLAN headers (if present). This will add
                         * the checksum manually.
                         */
                        skb->csum = csum_partial(skb->data + ETH_HLEN,
                                                 network_depth - ETH_HLEN,
                                                 skb->csum);

                mlx5e_skb_padding_csum(skb, network_depth, proto, stats);
                stats->csum_complete++;
                return;
        }

csum_unnecessary:
        if (likely((cqe->hds_ip_ext & CQE_L3_OK) &&
                   ((cqe->hds_ip_ext & CQE_L4_OK) ||
                    (get_cqe_l4_hdr_type(cqe) == CQE_L4_HDR_TYPE_NONE)))) {
                skb->ip_summed = CHECKSUM_UNNECESSARY;
                if (cqe_is_tunneled(cqe)) {
                        skb->csum_level = 1;
                        skb->encapsulation = 1;
                        stats->csum_unnecessary_inner++;
                        return;
                }
                stats->csum_unnecessary++;
                return;
        }
csum_none:
        skb->ip_summed = CHECKSUM_NONE;
        stats->csum_none++;
}

#define MLX5E_CE_BIT_MASK 0x80

static inline void mlx5e_build_rx_skb(struct mlx5_cqe64 *cqe,
                                      u32 cqe_bcnt,
                                      struct mlx5e_rq *rq,
                                      struct sk_buff *skb)
{
        u8 lro_num_seg = be32_to_cpu(cqe->srqn) >> 24;
        struct mlx5e_rq_stats *stats = rq->stats;
        struct net_device *netdev = rq->netdev;

        skb->mac_len = ETH_HLEN;

#ifdef CONFIG_MLX5_EN_TLS
        mlx5e_tls_handle_rx_skb(netdev, skb, &cqe_bcnt);
#endif

        if (lro_num_seg > 1) {
                mlx5e_lro_update_hdr(skb, cqe, cqe_bcnt);
                skb_shinfo(skb)->gso_size = DIV_ROUND_UP(cqe_bcnt, lro_num_seg);
                /* Subtract one since we already counted this as one
                 * "regular" packet in mlx5e_complete_rx_cqe()
                 */
                stats->packets += lro_num_seg - 1;
                stats->lro_packets++;
                stats->lro_bytes += cqe_bcnt;
        }

        if (unlikely(mlx5e_rx_hw_stamp(rq->tstamp)))
                skb_hwtstamps(skb)->hwtstamp =
                                mlx5_timecounter_cyc2time(rq->clock, get_cqe_ts(cqe));

        skb_record_rx_queue(skb, rq->ix);

        if (likely(netdev->features & NETIF_F_RXHASH))
                mlx5e_skb_set_hash(cqe, skb);

        if (cqe_has_vlan(cqe)) {
                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
                                       be16_to_cpu(cqe->vlan_info));
                stats->removed_vlan_packets++;
        }

        skb->mark = be32_to_cpu(cqe->sop_drop_qpn) & MLX5E_TC_FLOW_ID_MASK;

        mlx5e_handle_csum(netdev, cqe, rq, skb, !!lro_num_seg);
        /* checking CE bit in cqe - MSB in ml_path field */
        if (unlikely(cqe->ml_path & MLX5E_CE_BIT_MASK))
                mlx5e_enable_ecn(rq, skb);

        skb->protocol = eth_type_trans(skb, netdev);
}

static inline void mlx5e_complete_rx_cqe(struct mlx5e_rq *rq,
                                         struct mlx5_cqe64 *cqe,
                                         u32 cqe_bcnt,
                                         struct sk_buff *skb)
{
        struct mlx5e_rq_stats *stats = rq->stats;

        stats->packets++;
        stats->bytes += cqe_bcnt;
        mlx5e_build_rx_skb(cqe, cqe_bcnt, rq, skb);
}

static inline
struct sk_buff *mlx5e_build_linear_skb(struct mlx5e_rq *rq, void *va,
                                       u32 frag_size, u16 headroom,
                                       u32 cqe_bcnt)
{
        struct sk_buff *skb = build_skb(va, frag_size);

        if (unlikely(!skb)) {
                rq->stats->buff_alloc_err++;
                return NULL;
        }

        skb_reserve(skb, headroom);
        skb_put(skb, cqe_bcnt);

        return skb;
}

struct sk_buff *
mlx5e_skb_from_cqe_linear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
                          struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt)
{
        struct mlx5e_dma_info *di = wi->di;
        u16 rx_headroom = rq->buff.headroom;
        struct sk_buff *skb;
        void *va, *data;
        bool consumed;
        u32 frag_size;

        va             = page_address(di->page) + wi->offset;
        data           = va + rx_headroom;
        frag_size      = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt);

        dma_sync_single_range_for_cpu(rq->pdev, di->addr, wi->offset,
                                      frag_size, DMA_FROM_DEVICE);
        prefetchw(va); /* xdp_frame data area */
        prefetch(data);

        if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_RESP_SEND)) {
                rq->stats->wqe_err++;
                return NULL;
        }

        rcu_read_lock();
        consumed = mlx5e_xdp_handle(rq, di, va, &rx_headroom, &cqe_bcnt);
        rcu_read_unlock();
        if (consumed)
                return NULL; /* page/packet was consumed by XDP */

        skb = mlx5e_build_linear_skb(rq, va, frag_size, rx_headroom, cqe_bcnt);
        if (unlikely(!skb))
                return NULL;

        /* queue up for recycling/reuse */
        page_ref_inc(di->page);

        return skb;
}

struct sk_buff *
mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
                             struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt)
{
        struct mlx5e_rq_frag_info *frag_info = &rq->wqe.info.arr[0];
        struct mlx5e_wqe_frag_info *head_wi = wi;
        u16 headlen      = min_t(u32, MLX5E_RX_MAX_HEAD, cqe_bcnt);
        u16 frag_headlen = headlen;
        u16 byte_cnt     = cqe_bcnt - headlen;
        struct sk_buff *skb;

        if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_RESP_SEND)) {
                rq->stats->wqe_err++;
                return NULL;
        }

        /* XDP is not supported in this configuration, as incoming packets
         * might spread among multiple pages.
         */
        skb = napi_alloc_skb(rq->cq.napi,
                             ALIGN(MLX5E_RX_MAX_HEAD, sizeof(long)));
        if (unlikely(!skb)) {
                rq->stats->buff_alloc_err++;
                return NULL;
        }

        prefetchw(skb->data);

        while (byte_cnt) {
                u16 frag_consumed_bytes =
                        min_t(u16, frag_info->frag_size - frag_headlen, byte_cnt);

                mlx5e_add_skb_frag(rq, skb, wi->di, wi->offset + frag_headlen,
                                   frag_consumed_bytes, frag_info->frag_stride);
                byte_cnt -= frag_consumed_bytes;
                frag_headlen = 0;
                frag_info++;
                wi++;
        }

        /* copy header */
        mlx5e_copy_skb_header(rq->pdev, skb, head_wi->di, head_wi->offset, headlen);
        /* skb linear part was allocated with headlen and aligned to long */
        skb->tail += headlen;
        skb->len  += headlen;

        return skb;
}

void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
        struct mlx5_wq_cyc *wq = &rq->wqe.wq;
        struct mlx5e_wqe_frag_info *wi;
        struct sk_buff *skb;
        u32 cqe_bcnt;
        u16 ci;

        ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
        wi       = get_frag(rq, ci);
        cqe_bcnt = be32_to_cpu(cqe->byte_cnt);

        skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
        if (!skb) {
                /* probably for XDP */
                if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
                        /* do not return page to cache,
                         * it will be returned on XDP_TX completion.
                         */
                        goto wq_cyc_pop;
                }
                goto free_wqe;
        }

        mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
        napi_gro_receive(rq->cq.napi, skb);

free_wqe:
        mlx5e_free_rx_wqe(rq, wi, true);
wq_cyc_pop:
        mlx5_wq_cyc_pop(wq);
}

#ifdef CONFIG_MLX5_ESWITCH
void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
        struct net_device *netdev = rq->netdev;
        struct mlx5e_priv *priv = netdev_priv(netdev);
        struct mlx5e_rep_priv *rpriv  = priv->ppriv;
        struct mlx5_eswitch_rep *rep = rpriv->rep;
        struct mlx5_wq_cyc *wq = &rq->wqe.wq;
        struct mlx5e_wqe_frag_info *wi;
        struct sk_buff *skb;
        u32 cqe_bcnt;
        u16 ci;

        ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
        wi       = get_frag(rq, ci);
        cqe_bcnt = be32_to_cpu(cqe->byte_cnt);

        skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
        if (!skb) {
                /* probably for XDP */
                if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
                        /* do not return page to cache,
                         * it will be returned on XDP_TX completion.
                         */
                        goto wq_cyc_pop;
                }
                goto free_wqe;
        }

        mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);

        if (rep->vlan && skb_vlan_tag_present(skb))
                skb_vlan_pop(skb);

        napi_gro_receive(rq->cq.napi, skb);

free_wqe:
        mlx5e_free_rx_wqe(rq, wi, true);
wq_cyc_pop:
        mlx5_wq_cyc_pop(wq);
}
#endif

struct sk_buff *
mlx5e_skb_from_cqe_mpwrq_nonlinear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
                                   u16 cqe_bcnt, u32 head_offset, u32 page_idx)
{
        u16 headlen = min_t(u16, MLX5E_RX_MAX_HEAD, cqe_bcnt);
        struct mlx5e_dma_info *di = &wi->umr.dma_info[page_idx];
        u32 frag_offset    = head_offset + headlen;
        u32 byte_cnt       = cqe_bcnt - headlen;
        struct mlx5e_dma_info *head_di = di;
        struct sk_buff *skb;

        skb = napi_alloc_skb(rq->cq.napi,
                             ALIGN(MLX5E_RX_MAX_HEAD, sizeof(long)));
        if (unlikely(!skb)) {
                rq->stats->buff_alloc_err++;
                return NULL;
        }

        prefetchw(skb->data);

        if (unlikely(frag_offset >= PAGE_SIZE)) {
                di++;
                frag_offset -= PAGE_SIZE;
        }

        while (byte_cnt) {
                u32 pg_consumed_bytes =
                        min_t(u32, PAGE_SIZE - frag_offset, byte_cnt);
                unsigned int truesize =
                        ALIGN(pg_consumed_bytes, BIT(rq->mpwqe.log_stride_sz));

                mlx5e_add_skb_frag(rq, skb, di, frag_offset,
                                   pg_consumed_bytes, truesize);
                byte_cnt -= pg_consumed_bytes;
                frag_offset = 0;
                di++;
        }
        /* copy header */
        mlx5e_copy_skb_header(rq->pdev, skb, head_di, head_offset, headlen);
        /* skb linear part was allocated with headlen and aligned to long */
        skb->tail += headlen;
        skb->len  += headlen;

        return skb;
}

struct sk_buff *
mlx5e_skb_from_cqe_mpwrq_linear(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi,
                                u16 cqe_bcnt, u32 head_offset, u32 page_idx)
{
        struct mlx5e_dma_info *di = &wi->umr.dma_info[page_idx];
        u16 rx_headroom = rq->buff.headroom;
        u32 cqe_bcnt32 = cqe_bcnt;
        struct sk_buff *skb;
        void *va, *data;
        u32 frag_size;
        bool consumed;

        /* Check packet size. Note LRO doesn't use linear SKB */
        if (unlikely(cqe_bcnt > rq->hw_mtu)) {
                rq->stats->oversize_pkts_sw_drop++;
                return NULL;
        }

        va             = page_address(di->page) + head_offset;
        data           = va + rx_headroom;
        frag_size      = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt32);

        dma_sync_single_range_for_cpu(rq->pdev, di->addr, head_offset,
                                      frag_size, DMA_FROM_DEVICE);
        prefetchw(va); /* xdp_frame data area */
        prefetch(data);

        rcu_read_lock();
        consumed = mlx5e_xdp_handle(rq, di, va, &rx_headroom, &cqe_bcnt32);
        rcu_read_unlock();
        if (consumed) {
                if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags))
                        __set_bit(page_idx, wi->xdp_xmit_bitmap); /* non-atomic */
                return NULL; /* page/packet was consumed by XDP */
        }

        skb = mlx5e_build_linear_skb(rq, va, frag_size, rx_headroom, cqe_bcnt32);
        if (unlikely(!skb))
                return NULL;

        /* queue up for recycling/reuse */
        page_ref_inc(di->page);

        return skb;
}

void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
        u16 cstrides       = mpwrq_get_cqe_consumed_strides(cqe);
        u16 wqe_id         = be16_to_cpu(cqe->wqe_id);
        struct mlx5e_mpw_info *wi = &rq->mpwqe.info[wqe_id];
        u16 stride_ix      = mpwrq_get_cqe_stride_index(cqe);
        u32 wqe_offset     = stride_ix << rq->mpwqe.log_stride_sz;
        u32 head_offset    = wqe_offset & (PAGE_SIZE - 1);
        u32 page_idx       = wqe_offset >> PAGE_SHIFT;
        struct mlx5e_rx_wqe_ll *wqe;
        struct mlx5_wq_ll *wq;
        struct sk_buff *skb;
        u16 cqe_bcnt;

        wi->consumed_strides += cstrides;

        if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_RESP_SEND)) {
                rq->stats->wqe_err++;
                goto mpwrq_cqe_out;
        }

        if (unlikely(mpwrq_is_filler_cqe(cqe))) {
                struct mlx5e_rq_stats *stats = rq->stats;

                stats->mpwqe_filler_cqes++;
                stats->mpwqe_filler_strides += cstrides;
                goto mpwrq_cqe_out;
        }

        cqe_bcnt = mpwrq_get_cqe_byte_cnt(cqe);

        skb = rq->mpwqe.skb_from_cqe_mpwrq(rq, wi, cqe_bcnt, head_offset,
                                           page_idx);
        if (!skb)
                goto mpwrq_cqe_out;

        mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
        napi_gro_receive(rq->cq.napi, skb);

mpwrq_cqe_out:
        if (likely(wi->consumed_strides < rq->mpwqe.num_strides))
                return;

        wq  = &rq->mpwqe.wq;
        wqe = mlx5_wq_ll_get_wqe(wq, wqe_id);
        mlx5e_free_rx_mpwqe(rq, wi, true);
        mlx5_wq_ll_pop(wq, cqe->wqe_id, &wqe->next.next_wqe_index);
}

int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
{
        struct mlx5e_rq *rq = container_of(cq, struct mlx5e_rq, cq);
        struct mlx5_cqwq *cqwq = &cq->wq;
        struct mlx5_cqe64 *cqe;
        int work_done = 0;

        if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
                return 0;

        if (rq->cqd.left)
                work_done += mlx5e_decompress_cqes_cont(rq, cqwq, 0, budget);

        cqe = mlx5_cqwq_get_cqe(cqwq);
        if (!cqe) {
                if (unlikely(work_done))
                        goto out;
                return 0;
        }

        do {
                if (mlx5_get_cqe_format(cqe) == MLX5_COMPRESSED) {
                        work_done +=
                                mlx5e_decompress_cqes_start(rq, cqwq,
                                                            budget - work_done);
                        continue;
                }

                mlx5_cqwq_pop(cqwq);

                rq->handle_rx_cqe(rq, cqe);
        } while ((++work_done < budget) && (cqe = mlx5_cqwq_get_cqe(cqwq)));

out:
        if (rq->xdp_prog)
                mlx5e_xdp_rx_poll_complete(rq);

        mlx5_cqwq_update_db_record(cqwq);

        /* ensure cq space is freed before enabling more cqes */
        wmb();

        return work_done;
}

#ifdef CONFIG_MLX5_CORE_IPOIB

#define MLX5_IB_GRH_DGID_OFFSET 24
#define MLX5_GID_SIZE           16

static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq,
                                         struct mlx5_cqe64 *cqe,
                                         u32 cqe_bcnt,
                                         struct sk_buff *skb)
{
        struct hwtstamp_config *tstamp;
        struct mlx5e_rq_stats *stats;
        struct net_device *netdev;
        struct mlx5e_priv *priv;
        char *pseudo_header;
        u32 qpn;
        u8 *dgid;
        u8 g;

        qpn = be32_to_cpu(cqe->sop_drop_qpn) & 0xffffff;
        netdev = mlx5i_pkey_get_netdev(rq->netdev, qpn);

        /* No mapping present, cannot process SKB. This might happen if a child
         * interface is going down while having unprocessed CQEs on parent RQ
         */
        if (unlikely(!netdev)) {
                /* TODO: add drop counters support */
                skb->dev = NULL;
                pr_warn_once("Unable to map QPN %u to dev - dropping skb\n", qpn);
                return;
        }

        priv = mlx5i_epriv(netdev);
        tstamp = &priv->tstamp;
        stats = &priv->channel_stats[rq->ix].rq;

        g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
        dgid = skb->data + MLX5_IB_GRH_DGID_OFFSET;
        if ((!g) || dgid[0] != 0xff)
                skb->pkt_type = PACKET_HOST;
        else if (memcmp(dgid, netdev->broadcast + 4, MLX5_GID_SIZE) == 0)
                skb->pkt_type = PACKET_BROADCAST;
        else
                skb->pkt_type = PACKET_MULTICAST;

        /* TODO: IB/ipoib: Allow mcast packets from other VFs
         * 68996a6e760e5c74654723eeb57bf65628ae87f4
         */

        skb_pull(skb, MLX5_IB_GRH_BYTES);

        skb->protocol = *((__be16 *)(skb->data));

        if (netdev->features & NETIF_F_RXCSUM) {
                skb->ip_summed = CHECKSUM_COMPLETE;
                skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
                stats->csum_complete++;
        } else {
                skb->ip_summed = CHECKSUM_NONE;
                stats->csum_none++;
        }

        if (unlikely(mlx5e_rx_hw_stamp(tstamp)))
                skb_hwtstamps(skb)->hwtstamp =
                                mlx5_timecounter_cyc2time(rq->clock, get_cqe_ts(cqe));

        skb_record_rx_queue(skb, rq->ix);

        if (likely(netdev->features & NETIF_F_RXHASH))
                mlx5e_skb_set_hash(cqe, skb);

        /* 20 bytes of ipoib header and 4 for encap existing */
        pseudo_header = skb_push(skb, MLX5_IPOIB_PSEUDO_LEN);
        memset(pseudo_header, 0, MLX5_IPOIB_PSEUDO_LEN);
        skb_reset_mac_header(skb);
        skb_pull(skb, MLX5_IPOIB_HARD_LEN);

        skb->dev = netdev;

        stats->packets++;
        stats->bytes += cqe_bcnt;
}

void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
        struct mlx5_wq_cyc *wq = &rq->wqe.wq;
        struct mlx5e_wqe_frag_info *wi;
        struct sk_buff *skb;
        u32 cqe_bcnt;
        u16 ci;

        ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
        wi       = get_frag(rq, ci);
        cqe_bcnt = be32_to_cpu(cqe->byte_cnt);

        skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
        if (!skb)
                goto wq_free_wqe;

        mlx5i_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
        if (unlikely(!skb->dev)) {
                dev_kfree_skb_any(skb);
                goto wq_free_wqe;
        }
        napi_gro_receive(rq->cq.napi, skb);

wq_free_wqe:
        mlx5e_free_rx_wqe(rq, wi, true);
        mlx5_wq_cyc_pop(wq);
}

#endif /* CONFIG_MLX5_CORE_IPOIB */

#ifdef CONFIG_MLX5_EN_IPSEC

void mlx5e_ipsec_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
        struct mlx5_wq_cyc *wq = &rq->wqe.wq;
        struct mlx5e_wqe_frag_info *wi;
        struct sk_buff *skb;
        u32 cqe_bcnt;
        u16 ci;

        ci       = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
        wi       = get_frag(rq, ci);
        cqe_bcnt = be32_to_cpu(cqe->byte_cnt);

        skb = rq->wqe.skb_from_cqe(rq, cqe, wi, cqe_bcnt);
        if (unlikely(!skb)) {
                /* a DROP, save the page-reuse checks */
                mlx5e_free_rx_wqe(rq, wi, true);
                goto wq_cyc_pop;
        }
        skb = mlx5e_ipsec_handle_rx_skb(rq->netdev, skb, &cqe_bcnt);
        if (unlikely(!skb)) {
                mlx5e_free_rx_wqe(rq, wi, true);
                goto wq_cyc_pop;
        }

        mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
        napi_gro_receive(rq->cq.napi, skb);

        mlx5e_free_rx_wqe(rq, wi, true);
wq_cyc_pop:
        mlx5_wq_cyc_pop(wq);
}

#endif /* CONFIG_MLX5_EN_IPSEC */