cregit-Linux how code gets into the kernel

Release 4.11 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 <linux/bpf_trace.h>
#include <net/busy_poll.h>
#include "en.h"
#include "en_tc.h"
#include "eswitch.h"


static inline bool mlx5e_rx_hw_stamp(struct mlx5e_tstamp *tstamp) { return tstamp->hwtstamp_config.rx_filter == HWTSTAMP_FILTER_ALL; }

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static inline void mlx5e_read_cqe_slot(struct mlx5e_cq *cq, u32 cqcc, void *data) { u32 ci = cqcc & cq->wq.sz_m1; memcpy(data, mlx5_cqwq_get_wqe(&cq->wq, ci), sizeof(struct mlx5_cqe64)); }

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static inline void mlx5e_read_title_slot(struct mlx5e_rq *rq, struct mlx5e_cq *cq, u32 cqcc) { mlx5e_read_cqe_slot(cq, cqcc, &cq->title); cq->decmprs_left = be32_to_cpu(cq->title.byte_cnt); cq->decmprs_wqe_counter = be16_to_cpu(cq->title.wqe_counter); rq->stats.cqe_compress_blks++; }

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static inline void mlx5e_read_mini_arr_slot(struct mlx5e_cq *cq, u32 cqcc) { mlx5e_read_cqe_slot(cq, cqcc, cq->mini_arr); cq->mini_arr_idx = 0; }

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static inline void mlx5e_cqes_update_owner(struct mlx5e_cq *cq, u32 cqcc, int n) { u8 op_own = (cqcc >> cq->wq.log_sz) & 1; u32 wq_sz = 1 << cq->wq.log_sz; u32 ci = cqcc & cq->wq.sz_m1; u32 ci_top = min_t(u32, wq_sz, ci + n); for (; ci < ci_top; ci++, n--) { struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->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(&cq->wq, ci); cqe->op_own = op_own; } } }

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static inline void mlx5e_decompress_cqe(struct mlx5e_rq *rq, struct mlx5e_cq *cq, u32 cqcc) { cq->title.byte_cnt = cq->mini_arr[cq->mini_arr_idx].byte_cnt; cq->title.check_sum = cq->mini_arr[cq->mini_arr_idx].checksum; cq->title.op_own &= 0xf0; cq->title.op_own |= 0x01 & (cqcc >> cq->wq.log_sz); cq->title.wqe_counter = cpu_to_be16(cq->decmprs_wqe_counter); if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) cq->decmprs_wqe_counter += mpwrq_get_cqe_consumed_strides(&cq->title); else cq->decmprs_wqe_counter = (cq->decmprs_wqe_counter + 1) & rq->wq.sz_m1; }

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static inline void mlx5e_decompress_cqe_no_hash(struct mlx5e_rq *rq, struct mlx5e_cq *cq, u32 cqcc) { mlx5e_decompress_cqe(rq, cq, cqcc); cq->title.rss_hash_type = 0; cq->title.rss_hash_result = 0; }

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Tariq Toukan45100.00%1100.00%
Total45100.00%1100.00%


static inline u32 mlx5e_decompress_cqes_cont(struct mlx5e_rq *rq, struct mlx5e_cq *cq, int update_owner_only, int budget_rem) { u32 cqcc = cq->wq.cc + update_owner_only; u32 cqe_count; u32 i; cqe_count = min_t(u32, cq->decmprs_left, budget_rem); for (i = update_owner_only; i < cqe_count; i++, cq->mini_arr_idx++, cqcc++) { if (cq->mini_arr_idx == MLX5_MINI_CQE_ARRAY_SIZE) mlx5e_read_mini_arr_slot(cq, cqcc); mlx5e_decompress_cqe_no_hash(rq, cq, cqcc); rq->handle_rx_cqe(rq, &cq->title); } mlx5e_cqes_update_owner(cq, cq->wq.cc, cqcc - cq->wq.cc); cq->wq.cc = cqcc; cq->decmprs_left -= cqe_count; rq->stats.cqe_compress_pkts += cqe_count; return cqe_count; }

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Tariq Toukan156100.00%1100.00%
Total156100.00%1100.00%


static inline u32 mlx5e_decompress_cqes_start(struct mlx5e_rq *rq, struct mlx5e_cq *cq, int budget_rem) { mlx5e_read_title_slot(rq, cq, cq->wq.cc); mlx5e_read_mini_arr_slot(cq, cq->wq.cc + 1); mlx5e_decompress_cqe(rq, cq, cq->wq.cc); rq->handle_rx_cqe(rq, &cq->title); cq->mini_arr_idx++; return mlx5e_decompress_cqes_cont(rq, cq, 1, budget_rem) - 1; }

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Tariq Toukan90100.00%1100.00%
Total90100.00%1100.00%


void mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool val) { bool was_opened; if (!MLX5_CAP_GEN(priv->mdev, cqe_compression)) return; if (MLX5E_GET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_COMPRESS) == val) return; was_opened = test_bit(MLX5E_STATE_OPENED, &priv->state); if (was_opened) mlx5e_close_locked(priv->netdev); MLX5E_SET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_COMPRESS, val); mlx5e_set_rq_type_params(priv, priv->params.rq_wq_type); if (was_opened) mlx5e_open_locked(priv->netdev); }

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Tariq Toukan7174.74%125.00%
Shaker Daibes1313.68%250.00%
Saeed Mahameed1111.58%125.00%
Total95100.00%4100.00%

#define RQ_PAGE_SIZE(rq) ((1 << rq->buff.page_order) << PAGE_SHIFT)
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); if (tail_next == cache->head) { rq->stats.cache_full++; return false; } if (unlikely(page_is_pfmemalloc(dma_info->page))) return false; cache->page_cache[cache->tail] = *dma_info; cache->tail = tail_next; return true; }

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Saeed Mahameed5353.00%125.00%
Amir Vadai2323.00%125.00%
Eric Dumazet1515.00%125.00%
Tariq Toukan99.00%125.00%
Total100100.00%4100.00%


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; if (unlikely(cache->head == cache->tail)) { rq->stats.cache_empty++; return false; } if (page_ref_count(cache->page_cache[cache->head].page) != 1) { rq->stats.cache_busy++; return false; } *dma_info = cache->page_cache[cache->head]; cache->head = (cache->head + 1) & (MLX5E_CACHE_SIZE - 1); rq->stats.cache_reuse++; dma_sync_single_for_device(rq->pdev, dma_info->addr, RQ_PAGE_SIZE(rq), DMA_FROM_DEVICE); return true; }

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PersonTokensPropCommitsCommitProp
Saeed Mahameed11078.57%133.33%
Daniel Jurgens2517.86%133.33%
Tariq Toukan53.57%133.33%
Total140100.00%3100.00%


static inline int mlx5e_page_alloc_mapped(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info) { struct page *page; if (mlx5e_rx_cache_get(rq, dma_info)) return 0; page = dev_alloc_pages(rq->buff.page_order); if (unlikely(!page)) return -ENOMEM; dma_info->page = page; dma_info->addr = dma_map_page(rq->pdev, page, 0, RQ_PAGE_SIZE(rq), rq->buff.map_dir); if (unlikely(dma_mapping_error(rq->pdev, dma_info->addr))) { put_page(page); return -ENOMEM; } return 0; }

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Saeed Mahameed8470.59%250.00%
Tariq Toukan3529.41%250.00%
Total119100.00%4100.00%


void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info, bool recycle) { if (likely(recycle) && mlx5e_rx_cache_put(rq, dma_info)) return; dma_unmap_page(rq->pdev, dma_info->addr, RQ_PAGE_SIZE(rq), rq->buff.map_dir); put_page(dma_info->page); }

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Tariq Toukan3150.00%133.33%
Saeed Mahameed3150.00%266.67%
Total62100.00%3100.00%


int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix) { struct mlx5e_dma_info *di = &rq->dma_info[ix]; if (unlikely(mlx5e_page_alloc_mapped(rq, di))) return -ENOMEM; wqe->data.addr = cpu_to_be64(di->addr + rq->rx_headroom); return 0; }

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PersonTokensPropCommitsCommitProp
Saeed Mahameed4973.13%133.33%
Tariq Toukan1522.39%133.33%
Martin KaFai Lau34.48%133.33%
Total67100.00%3100.00%


void mlx5e_dealloc_rx_wqe(struct mlx5e_rq *rq, u16 ix) { struct mlx5e_dma_info *di = &rq->dma_info[ix]; mlx5e_page_release(rq, di, true); }

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PersonTokensPropCommitsCommitProp
Saeed Mahameed1851.43%250.00%
Tariq Toukan1748.57%250.00%
Total35100.00%4100.00%


static inline int mlx5e_mpwqe_strides_per_page(struct mlx5e_rq *rq) { return rq->mpwqe_num_strides >> MLX5_MPWRQ_WQE_PAGE_ORDER; }

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Saeed Mahameed1578.95%150.00%
Tariq Toukan421.05%150.00%
Total19100.00%2100.00%


static inline void mlx5e_add_skb_frag_mpwqe(struct mlx5e_rq *rq, struct sk_buff *skb, struct mlx5e_mpw_info *wi, u32 page_idx, u32 frag_offset, u32 len) { unsigned int truesize = ALIGN(len, rq->mpwqe_stride_sz); dma_sync_single_for_cpu(rq->pdev, wi->umr.dma_info[page_idx].addr + frag_offset, len, DMA_FROM_DEVICE); wi->skbs_frags[page_idx]++; skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, wi->umr.dma_info[page_idx].page, frag_offset, len, truesize); }

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Saeed Mahameed6965.71%133.33%
Tariq Toukan3634.29%266.67%
Total105100.00%3100.00%


static inline void mlx5e_copy_skb_header_mpwqe(struct device *pdev, struct sk_buff *skb, struct mlx5e_mpw_info *wi, u32 page_idx, u32 offset, u32 headlen) { u16 headlen_pg = min_t(u32, headlen, PAGE_SIZE - offset); struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[page_idx]; unsigned int len; /* Aligning len to sizeof(long) optimizes memcpy performance */ len = ALIGN(headlen_pg, sizeof(long)); dma_sync_single_for_cpu(pdev, dma_info->addr + offset, len, DMA_FROM_DEVICE); skb_copy_to_linear_data_offset(skb, 0, page_address(dma_info->page) + offset, len); if (unlikely(offset + headlen > PAGE_SIZE)) { dma_info++; headlen_pg = len; len = ALIGN(headlen - headlen_pg, sizeof(long)); dma_sync_single_for_cpu(pdev, dma_info->addr, len, DMA_FROM_DEVICE); skb_copy_to_linear_data_offset(skb, headlen_pg, page_address(dma_info->page), len); } }

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Saeed Mahameed12169.94%150.00%
Tariq Toukan5230.06%150.00%
Total173100.00%2100.00%


static inline void mlx5e_post_umr_wqe(struct mlx5e_rq *rq, u16 ix) { struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix]; struct mlx5e_sq *sq = &rq->channel->icosq; struct mlx5_wq_cyc *wq = &sq->wq; struct mlx5e_umr_wqe *wqe; u8 num_wqebbs = DIV_ROUND_UP(sizeof(*wqe), MLX5_SEND_WQE_BB); u16 pi; /* fill sq edge with nops to avoid wqe wrap around */ while ((pi = (sq->pc & wq->sz_m1)) > sq->edge) { sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_NOP; sq->db.ico_wqe[pi].num_wqebbs = 1; mlx5e_send_nop(sq, false); } wqe = mlx5_wq_cyc_get_wqe(wq, pi); memcpy(wqe, &wi->umr.wqe, sizeof(*wqe)); wqe->ctrl.opmod_idx_opcode = cpu_to_be32((sq->pc << MLX5_WQE_CTRL_WQE_INDEX_SHIFT) | MLX5_OPCODE_UMR); sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_UMR; sq->db.ico_wqe[pi].num_wqebbs = num_wqebbs; sq->pc += num_wqebbs; mlx5e_tx_notify_hw(sq, &wqe->ctrl, 0); }

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Saeed Mahameed17780.45%450.00%
Tariq Toukan4319.55%450.00%
Total220100.00%8100.00%


static int mlx5e_alloc_rx_umr_mpwqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix) { struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix]; u64 dma_offset = (u64)mlx5e_get_wqe_mtt_offset(rq, ix) << PAGE_SHIFT; int pg_strides = mlx5e_mpwqe_strides_per_page(rq); int err; int i; for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++) { struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[i]; err = mlx5e_page_alloc_mapped(rq, dma_info); if (unlikely(err)) goto err_unmap; wi->umr.mtt[i] = cpu_to_be64(dma_info->addr | MLX5_EN_WR); page_ref_add(dma_info->page, pg_strides); wi->skbs_frags[i] = 0; } wi->consumed_strides = 0; wqe->data.addr = cpu_to_be64(dma_offset); return 0; err_unmap: while (--i >= 0) { struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[i]; page_ref_sub(dma_info->page, pg_strides); mlx5e_page_release(rq, dma_info, true); } return err; }

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Tariq Toukan20695.81%562.50%
Saeed Mahameed73.26%225.00%
JoonSoo Kim20.93%112.50%
Total215100.00%8100.00%


void mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi) { int pg_strides = mlx5e_mpwqe_strides_per_page(rq); int i; for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++) { struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[i]; page_ref_sub(dma_info->page, pg_strides - wi->skbs_frags[i]); mlx5e_page_release(rq, dma_info, true); } }

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Tariq Toukan7896.30%583.33%
JoonSoo Kim33.70%116.67%
Total81100.00%6100.00%


void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq) { struct mlx5_wq_ll *wq = &rq->wq; struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head); clear_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state); if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state))) { mlx5e_free_rx_mpwqe(rq, &rq->mpwqe.info[wq->head]); return; } 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); }

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Tariq Toukan9895.15%250.00%
Saeed Mahameed32.91%125.00%
Mohamad Haj Yahia21.94%125.00%
Total103100.00%4100.00%


int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix) { int err; err = mlx5e_alloc_rx_umr_mpwqe(rq, wqe, ix); if (unlikely(err)) return err; set_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state); mlx5e_post_umr_wqe(rq, ix); return -EBUSY; }

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Tariq Toukan63100.00%2100.00%
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void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix) { struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix]; mlx5e_free_rx_mpwqe(rq, wi); }

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Daniel Jurgens3188.57%133.33%
Saeed Mahameed38.57%133.33%
Tariq Toukan12.86%133.33%
Total35100.00%3100.00%

#define RQ_CANNOT_POST(rq) \ (!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state) || \ test_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state))
bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq) { struct mlx5_wq_ll *wq = &rq->wq; if (unlikely(RQ_CANNOT_POST(rq))) return false; while (!mlx5_wq_ll_is_full(wq)) { struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head); int err; err = rq->alloc_wqe(rq, wqe, wq->head); if (err == -EBUSY) return true; if (unlikely(err)) { rq->stats.buff_alloc_err++; break; } 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); return !mlx5_wq_ll_is_full(wq); }

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PersonTokensPropCommitsCommitProp
Amir Vadai9773.48%120.00%
Tariq Toukan3526.52%480.00%
Total132100.00%5100.00%


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 iphdr *ipv4; struct ipv6hdr *ipv6; struct tcphdr *tcp; int network_depth = 0; __be16 proto; u16 tot_len; u8 l4_hdr_type = get_cqe_l4_hdr_type(cqe); int tcp_ack = ((CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA == l4_hdr_type) || (CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA == l4_hdr_type)); skb->mac_len = ETH_HLEN; proto = __vlan_get_protocol(skb, eth->h_proto, &network_depth); ipv4 = (struct iphdr *)(skb->data + network_depth); ipv6 = (struct ipv6hdr *)(skb->data + network_depth); tot_len = cqe_bcnt - network_depth; if (proto == htons(ETH_P_IP)) { tcp = (struct tcphdr *)(skb->data + network_depth + sizeof(struct iphdr)); ipv6 = NULL; skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; } else { tcp = (struct tcphdr *)(skb->data + network_depth + sizeof(struct ipv6hdr)); ipv4 = NULL; skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; } if (get_cqe_lro_tcppsh(cqe)) tcp->psh = 1; if (tcp_ack) { tcp->ack = 1; tcp->ack_seq = cqe->lro_ack_seq_num; tcp->window = cqe->lro_tcp_win; } if (ipv4) { 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); } else { ipv6->hop_limit = cqe->lro_min_ttl; ipv6->payload_len = cpu_to_be16(tot_len - sizeof(struct ipv6hdr)); } }

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Amir Vadai24973.67%125.00%
Gal Pressman6719.82%125.00%
Achiad Shochat185.33%125.00%
Tariq Toukan41.18%125.00%
Total338100.00%4100.00%


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); }

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PersonTokensPropCommitsCommitProp
Amir Vadai59100.00%1100.00%
Total59100.00%1100.00%


static inline bool is_first_ethertype_ip(struct sk_buff *skb) { __be16 ethertype = ((struct ethhdr *)skb->data)->h_proto; return (ethertype == htons(ETH_P_IP) || ethertype == htons(ETH_P_IPV6)); }

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Achiad Shochat45100.00%1100.00%
Total45100.00%1100.00%


static inline void mlx5e_handle_csum(struct net_device *netdev, struct mlx5_cqe64 *cqe, struct mlx5e_rq *rq, struct sk_buff *skb, bool lro) { if (unlikely(!(netdev->features & NETIF_F_RXCSUM))) goto csum_none; if (lro) { skb->ip_summed = CHECKSUM_UNNECESSARY; return; } if (is_first_ethertype_ip(skb)) { skb->ip_summed = CHECKSUM_COMPLETE; skb->csum = csum_unfold((__force __sum16)cqe->check_sum); rq->stats.csum_complete++; return; } if (likely((cqe->hds_ip_ext & CQE_L3_OK) && (cqe->hds_ip_ext & CQE_L4_OK))) { skb->ip_summed = CHECKSUM_UNNECESSARY; if (cqe_is_tunneled(cqe)) { skb->csum_level = 1; skb->encapsulation = 1; rq->stats.csum_unnecessary_inner++; } return; } csum_none: skb->ip_summed = CHECKSUM_NONE; rq->stats.csum_none++; }

Contributors

PersonTokensPropCommitsCommitProp
Achiad Shochat10561.40%120.00%
Saeed Mahameed5632.75%120.00%
Matthew Finlay42.34%120.00%
David S. Miller42.34%120.00%
Gal Pressman21.17%120.00%
Total171100.00%5100.00%


static inline void mlx5e_build_rx_skb(struct mlx5_cqe64 *cqe, u32 cqe_bcnt, struct mlx5e_rq *rq, struct sk_buff *skb) { struct net_device *netdev = rq->netdev; struct mlx5e_tstamp *tstamp = rq->tstamp; int lro_num_seg; lro_num_seg = be32_to_cpu(cqe->srqn) >> 24; 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() */ rq->stats.packets += lro_num_seg - 1; rq->stats.lro_packets++; rq->stats.lro_bytes += cqe_bcnt; } if (unlikely(mlx5e_rx_hw_stamp(tstamp))) mlx5e_fill_hwstamp(tstamp, get_cqe_ts(cqe), skb_hwtstamps(skb)); 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)); skb->mark = be32_to_cpu(cqe->sop_drop_qpn) & MLX5E_TC_FLOW_ID_MASK; mlx5e_handle_csum(netdev, cqe, rq, skb, !!lro_num_seg); skb->protocol = eth_type_trans(skb, netdev); }

Contributors

PersonTokensPropCommitsCommitProp
Amir Vadai14764.19%228.57%
Eran Ben Elisha3414.85%114.29%
Saeed Mahameed2611.35%114.29%
Gal Pressman114.80%114.29%
Achiad Shochat62.62%114.29%
Tariq Toukan52.18%114.29%
Total229100.00%7100.00%


static inline void mlx5e_complete_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe, u32 cqe_bcnt, struct sk_buff *skb) { rq->stats.packets++; rq->stats.bytes += cqe_bcnt; mlx5e_build_rx_skb(cqe, cqe_bcnt, rq, skb); }

Contributors

PersonTokensPropCommitsCommitProp
Tariq Toukan51100.00%1100.00%
Total51100.00%1100.00%


static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_sq *sq) { struct mlx5_wq_cyc *wq = &sq->wq; struct mlx5e_tx_wqe *wqe; u16 pi = (sq->pc - MLX5E_XDP_TX_WQEBBS) & wq->sz_m1; /* last pi */ wqe = mlx5_wq_cyc_get_wqe(wq, pi); wqe->ctrl.fm_ce_se = MLX5_WQE_CTRL_CQ_UPDATE; mlx5e_tx_notify_hw(sq, &wqe->ctrl, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Saeed Mahameed72100.00%1100.00%
Total72100.00%1100.00%


static inline bool mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq, struct mlx5e_dma_info *di, const struct xdp_buff *xdp) { struct mlx5e_sq *sq = &rq->channel->xdp_sq; struct mlx5_wq_cyc *wq = &sq->wq; u16 pi = sq->pc & wq->sz_m1; struct mlx5e_tx_wqe *wqe = mlx5_wq_cyc_get_wqe(wq, pi); struct mlx5e_sq_wqe_info *wi = &sq->db.xdp.wqe_info[pi]; struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl; struct mlx5_wqe_eth_seg *eseg = &wqe->eth; struct mlx5_wqe_data_seg *dseg; u8 ds_cnt = MLX5E_XDP_TX_DS_COUNT; ptrdiff_t data_offset = xdp->data - xdp->data_hard_start; dma_addr_t dma_addr = di->addr + data_offset; unsigned int dma_len = xdp->data_end - xdp->data; if (unlikely(dma_len < MLX5E_XDP_MIN_INLINE || MLX5E_SW2HW_MTU(rq->netdev->mtu) < dma_len)) { rq->stats.xdp_drop++; mlx5e_page_release(rq, di, true); return false; } if (unlikely(!mlx5e_sq_has_room_for(sq, MLX5E_XDP_TX_WQEBBS))) { if (sq->db.xdp.doorbell) { /* SQ is full, ring doorbell */ mlx5e_xmit_xdp_doorbell(sq); sq->db.xdp.doorbell = false; } rq->stats.xdp_tx_full++; mlx5e_page_release(rq, di, true); return false; } dma_sync_single_for_device(sq->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE); memset(wqe, 0, sizeof(*wqe)); dseg = (struct mlx5_wqe_data_seg *)eseg + 1; /* copy the inline part if required */ if (sq->min_inline_mode != MLX5_INLINE_MODE_NONE) { memcpy(eseg->inline_hdr.start, xdp->data, MLX5E_XDP_MIN_INLINE); eseg->inline_hdr.sz = cpu_to_be16(MLX5E_XDP_MIN_INLINE); dma_len -= MLX5E_XDP_MIN_INLINE; dma_addr += MLX5E_XDP_MIN_INLINE; ds_cnt += MLX5E_XDP_IHS_DS_COUNT; dseg++; } /* write the dma part */ dseg->addr = cpu_to_be64(dma_addr); dseg->byte_count = cpu_to_be32(dma_len); dseg->lkey = sq->mkey_be; cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_SEND); cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt); sq->db.xdp.di[pi] = *di; wi->opcode = MLX5_OPCODE_SEND; wi->num_wqebbs = MLX5E_XDP_TX_WQEBBS; sq->pc += MLX5E_XDP_TX_WQEBBS; sq->db.xdp.doorbell = true; rq->stats.xdp_tx++; return true; }

Contributors

PersonTokensPropCommitsCommitProp
Saeed Mahameed38384.73%466.67%
Martin KaFai Lau5913.05%116.67%
Daniel Borkmann102.21%116.67%
Total452100.00%6100.00%

/* returns true if packet was consumed by xdp */
static inline int mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di, void *va, u16 *rx_headroom, u32 *len) { const struct bpf_prog *prog = READ_ONCE(rq->xdp_prog); struct xdp_buff xdp; u32 act; if (!prog) return false; xdp.data = va + *rx_headroom; xdp.data_end = xdp.data + *len; xdp.data_hard_start = va; act = bpf_prog_run_xdp(prog, &xdp); switch (act) { case XDP_PASS: *rx_headroom = xdp.data - xdp.data_hard_start; *len = xdp.data_end - xdp.data; return false; case XDP_TX: if (unlikely(!mlx5e_xmit_xdp_frame(rq, di, &xdp))) trace_xdp_exception(rq->netdev, prog, act); return true; default: bpf_warn_invalid_xdp_action(act); case XDP_ABORTED: trace_xdp_exception(rq->netdev, prog, act); case XDP_DROP: rq->stats.xdp_drop++; mlx5e_page_release(rq, di, true); return true; } }

Contributors

PersonTokensPropCommitsCommitProp
Saeed Mahameed7637.62%125.00%
Martin KaFai Lau5527.23%125.00%
Rana Shahout4321.29%125.00%
Daniel Borkmann2813.86%125.00%
Total202100.00%4100.00%


static inline struct sk_buff *skb_from_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe, u16 wqe_counter, u32 cqe_bcnt) { struct mlx5e_dma_info *di; struct sk_buff *skb; void *va, *data; u16 rx_headroom = rq->rx_headroom; bool consumed; di = &rq->dma_info[wqe_counter]; va = page_address(di->page); data = va + rx_headroom; dma_sync_single_range_for_cpu(rq->pdev, di->addr, rx_headroom, rq->buff.wqe_sz, DMA_FROM_DEVICE); prefetch(data); if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) { rq->stats.wqe_err++; mlx5e_page_release(rq, di, true); 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 = build_skb(va, RQ_PAGE_SIZE(rq)); if (unlikely(!skb)) { rq->stats.buff_alloc_err++; mlx5e_page_release(rq, di, true); return NULL; } /* queue up for recycling ..*/ page_ref_inc(di->page); mlx5e_page_release(rq, di, true); skb_reserve(skb, rx_headroom); skb_put(skb, cqe_bcnt); return skb; }

Contributors

PersonTokensPropCommitsCommitProp
Saeed Mahameed11245.71%436.36%
Amir Vadai5823.67%19.09%
Or Gerlitz2510.20%19.09%
Martin KaFai Lau156.12%19.09%
Daniel Borkmann156.12%19.09%
Tariq Toukan124.90%218.18%
Rana Shahout83.27%19.09%
Total245100.00%11100.00%


void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe) { struct mlx5e_rx_wqe *wqe; __be16 wqe_counter_be; struct sk_buff *skb; u16 wqe_counter; u32 cqe_bcnt; wqe_counter_be = cqe->wqe_counter; wqe_counter = be16_to_cpu(wqe_counter_be); wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter); cqe_bcnt = be32_to_cpu(cqe->byte_cnt); skb = skb_from_cqe(rq, cqe, wqe_counter, cqe_bcnt); if (!skb) goto wq_ll_pop; mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb); napi_gro_receive(rq->cq.napi, skb); wq_ll_pop: mlx5_wq_ll_pop(&rq->wq, wqe_counter_be, &wqe->next.next_wqe_index); }

Contributors

PersonTokensPropCommitsCommitProp
Or Gerlitz9976.15%150.00%
Tariq Toukan3123.85%150.00%
Total130100.00%2100.00%


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 mlx5_eswitch_rep *rep = priv->ppriv; struct mlx5e_rx_wqe *wqe; struct sk_buff *skb; __be16 wqe_counter_be; u16 wqe_counter; u32 cqe_bcnt; wqe_counter_be = cqe->wqe_counter; wqe_counter = be16_to_cpu(wqe_counter_be); wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter); cqe_bcnt = be32_to_cpu(cqe->byte_cnt); skb = skb_from_cqe(rq, cqe, wqe_counter, cqe_bcnt); if (!skb) goto wq_ll_pop; 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); wq_ll_pop: mlx5_wq_ll_pop(&rq->wq, wqe_counter_be, &wqe->next.next_wqe_index); }

Contributors

PersonTokensPropCommitsCommitProp
Or Gerlitz174100.00%1100.00%
Total174100.00%1100.00%


static inline void mlx5e_mpwqe_fill_rx_skb(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe, struct mlx5e_mpw_info *wi, u32 cqe_bcnt, struct sk_buff *skb) { u16 stride_ix = mpwrq_get_cqe_stride_index(cqe); u32 wqe_offset = stride_ix * rq->mpwqe_stride_sz; u32 head_offset = wqe_offset & (PAGE_SIZE - 1); u32 page_idx = wqe_offset >> PAGE_SHIFT; u32 head_page_idx = page_idx; u16 headlen = min_t(u16, MLX5_MPWRQ_SMALL_PACKET_THRESHOLD, cqe_bcnt); u32 frag_offset = head_offset + headlen; u16 byte_cnt = cqe_bcnt - headlen; if (unlikely(frag_offset >= PAGE_SIZE)) { page_idx++; frag_offset -= PAGE_SIZE; } while (byte_cnt) { u32 pg_consumed_bytes = min_t(u32, PAGE_SIZE - frag_offset, byte_cnt); mlx5e_add_skb_frag_mpwqe(rq, skb, wi, page_idx, frag_offset, pg_consumed_bytes); byte_cnt -= pg_consumed_bytes; frag_offset = 0; page_idx++; } /* copy header */ mlx5e_copy_skb_header_mpwqe(rq->pdev, skb, wi, head_page_idx, head_offset, headlen); /* skb linear part was allocated with headlen and aligned to long */ skb->tail += headlen; skb->len += headlen; }

Contributors

PersonTokensPropCommitsCommitProp
Tariq Toukan191100.00%4100.00%
Total191100.00%4100.00%


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]; struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_id); struct sk_buff *skb; u16 cqe_bcnt; wi->consumed_strides += cstrides; if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) { rq->stats.wqe_err++; goto mpwrq_cqe_out; } if (unlikely(mpwrq_is_filler_cqe(cqe))) { rq->stats.mpwqe_filler++; goto mpwrq_cqe_out; } skb = napi_alloc_skb(rq->cq.napi, ALIGN(MLX5_MPWRQ_SMALL_PACKET_THRESHOLD, sizeof(long))); if (unlikely(!skb)) { rq->stats.buff_alloc_err++; goto mpwrq_cqe_out; } prefetch(skb->data); cqe_bcnt = mpwrq_get_cqe_byte_cnt(cqe); mlx5e_mpwqe_fill_rx_skb(rq, cqe, wi, cqe_bcnt, skb); 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; mlx5e_free_rx_mpwqe(rq, wi); mlx5_wq_ll_pop(&rq->wq, cqe->wqe_id, &wqe->next.next_wqe_index); }

Contributors

PersonTokensPropCommitsCommitProp
Tariq Toukan21282.17%660.00%
Amir Vadai249.30%110.00%
Or Gerlitz114.26%110.00%
Gal Pressman83.10%110.00%
Saeed Mahameed31.16%110.00%
Total258100.00%10100.00%


int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget) { struct mlx5e_rq *rq = container_of(cq, struct mlx5e_rq, cq); struct mlx5e_sq *xdp_sq = &rq->channel->xdp_sq; int work_done = 0; if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state))) return 0; if (cq->decmprs_left) work_done += mlx5e_decompress_cqes_cont(rq, cq, 0, budget); for (; work_done < budget; work_done++) { struct mlx5_cqe64 *cqe = mlx5e_get_cqe(cq); if (!cqe) break; if (mlx5_get_cqe_format(cqe) == MLX5_COMPRESSED) { work_done += mlx5e_decompress_cqes_start(rq, cq, budget - work_done); continue; } mlx5_cqwq_pop(&cq->wq); rq->handle_rx_cqe(rq, cqe); } if (xdp_sq->db.xdp.doorbell) { mlx5e_xmit_xdp_doorbell(xdp_sq); xdp_sq->db.xdp.doorbell = false; } mlx5_cqwq_update_db_record(&cq->wq); /* ensure cq space is freed before enabling more cqes */ wmb(); return work_done; }

Contributors

PersonTokensPropCommitsCommitProp
Tariq Toukan12162.05%228.57%
Saeed Mahameed3920.00%114.29%
Daniel Jurgens178.72%114.29%
Amir Vadai157.69%114.29%
Mohamad Haj Yahia21.03%114.29%
Eric Dumazet10.51%114.29%
Total195100.00%7100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Tariq Toukan216140.25%1121.57%
Saeed Mahameed152628.42%1427.45%
Amir Vadai68812.81%23.92%
Or Gerlitz3125.81%23.92%
Achiad Shochat1743.24%23.92%
Martin KaFai Lau1322.46%11.96%
Gal Pressman881.64%47.84%
Daniel Jurgens731.36%11.96%
Daniel Borkmann561.04%23.92%
Eran Ben Elisha551.02%11.96%
Rana Shahout510.95%11.96%
Eric Dumazet190.35%35.88%
Shaker Daibes130.24%23.92%
Mohamad Haj Yahia80.15%23.92%
JoonSoo Kim50.09%11.96%
Matthew Finlay40.07%11.96%
David S. Miller40.07%11.96%
Total5369100.00%51100.00%
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