| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tariq Toukan | 2175 | 47.33% | 31 | 29.25% |
| Maxim Mikityanskiy | 1095 | 23.83% | 25 | 23.58% |
| Jesper Dangaard Brouer | 375 | 8.16% | 5 | 4.72% |
| Stanislav Fomichev | 260 | 5.66% | 1 | 0.94% |
| Toke Höiland-Jörgensen | 176 | 3.83% | 2 | 1.89% |
| Saeed Mahameed | 87 | 1.89% | 8 | 7.55% |
| Larysa Zaremba | 80 | 1.74% | 1 | 0.94% |
| Amir Vadai | 68 | 1.48% | 1 | 0.94% |
| Shay Agroskin | 66 | 1.44% | 3 | 2.83% |
| Lorenzo Bianconi | 57 | 1.24% | 3 | 2.83% |
| Kees Cook | 30 | 0.65% | 1 | 0.94% |
| Ilya Lesokhin | 30 | 0.65% | 1 | 0.94% |
| Carolina Jubran | 21 | 0.46% | 2 | 1.89% |
| Achiad Shochat | 13 | 0.28% | 2 | 1.89% |
| Aya Levin | 9 | 0.20% | 2 | 1.89% |
| Ilan Tayari | 7 | 0.15% | 1 | 0.94% |
| Tal Gilboa | 6 | 0.13% | 1 | 0.94% |
| Magnus Karlsson | 5 | 0.11% | 3 | 2.83% |
| Hadar Hen Zion | 5 | 0.11% | 2 | 1.89% |
| Feras Daoud | 4 | 0.09% | 1 | 0.94% |
| Gustavo A. R. Silva | 4 | 0.09% | 1 | 0.94% |
| Daniel Jurgens | 4 | 0.09% | 1 | 0.94% |
| Gal Pressman | 3 | 0.07% | 1 | 0.94% |
| Lin Yun Sheng | 3 | 0.07% | 1 | 0.94% |
| Björn Töpel | 3 | 0.07% | 1 | 0.94% |
| Daniel Borkmann | 3 | 0.07% | 1 | 0.94% |
| Mohamad Haj Yahia | 2 | 0.04% | 1 | 0.94% |
| Kevin Laatz | 2 | 0.04% | 1 | 0.94% |
| Sebastian Andrzej Siewior | 1 | 0.02% | 1 | 0.94% |
| Dragos Tatulea | 1 | 0.02% | 1 | 0.94% |
| Total | 4595 | 106 |
/* * Copyright (c) 2018, 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/bpf_trace.h> #include <net/xdp_sock_drv.h> #include "en/xdp.h" #include "en/params.h" #include <linux/bitfield.h> #include <net/page_pool/helpers.h> int mlx5e_xdp_max_mtu(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk) { int hr = mlx5e_get_linear_rq_headroom(params, xsk); /* Let S := SKB_DATA_ALIGN(sizeof(struct skb_shared_info)). * The condition checked in mlx5e_rx_is_linear_skb is: * SKB_DATA_ALIGN(sw_mtu + hard_mtu + hr) + S <= PAGE_SIZE (1) * (Note that hw_mtu == sw_mtu + hard_mtu.) * What is returned from this function is: * max_mtu = PAGE_SIZE - S - hr - hard_mtu (2) * After assigning sw_mtu := max_mtu, the left side of (1) turns to * SKB_DATA_ALIGN(PAGE_SIZE - S) + S, which is equal to PAGE_SIZE, * because both PAGE_SIZE and S are already aligned. Any number greater * than max_mtu would make the left side of (1) greater than PAGE_SIZE, * so max_mtu is the maximum MTU allowed. */ return MLX5E_HW2SW_MTU(params, SKB_MAX_HEAD(hr)); } static inline bool mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq, struct xdp_buff *xdp) { struct page *page = virt_to_page(xdp->data); struct mlx5e_xmit_data_frags xdptxdf = {}; struct mlx5e_xmit_data *xdptxd; struct xdp_frame *xdpf; dma_addr_t dma_addr; int i; xdpf = xdp_convert_buff_to_frame(xdp); if (unlikely(!xdpf)) return false; xdptxd = &xdptxdf.xd; xdptxd->data = xdpf->data; xdptxd->len = xdpf->len; xdptxd->has_frags = xdp_frame_has_frags(xdpf); if (xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL) { /* The xdp_buff was in the UMEM and was copied into a newly * allocated page. The UMEM page was returned via the ZCA, and * this new page has to be mapped at this point and has to be * unmapped and returned via xdp_return_frame on completion. */ /* Prevent double recycling of the UMEM page. Even in case this * function returns false, the xdp_buff shouldn't be recycled, * as it was already done in xdp_convert_zc_to_xdp_frame. */ __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); /* non-atomic */ if (unlikely(xdptxd->has_frags)) return false; dma_addr = dma_map_single(sq->pdev, xdptxd->data, xdptxd->len, DMA_TO_DEVICE); if (dma_mapping_error(sq->pdev, dma_addr)) { xdp_return_frame(xdpf); return false; } xdptxd->dma_addr = dma_addr; if (unlikely(!INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe, mlx5e_xmit_xdp_frame, sq, xdptxd, 0, NULL))) return false; /* xmit_mode == MLX5E_XDP_XMIT_MODE_FRAME */ mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .mode = MLX5E_XDP_XMIT_MODE_FRAME }); mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .frame.xdpf = xdpf }); mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .frame.dma_addr = dma_addr }); return true; } /* Driver assumes that xdp_convert_buff_to_frame returns an xdp_frame * that points to the same memory region as the original xdp_buff. It * allows to map the memory only once and to use the DMA_BIDIRECTIONAL * mode. */ dma_addr = page_pool_get_dma_addr(page) + (xdpf->data - (void *)xdpf); dma_sync_single_for_device(sq->pdev, dma_addr, xdptxd->len, DMA_BIDIRECTIONAL); if (xdptxd->has_frags) { xdptxdf.sinfo = xdp_get_shared_info_from_frame(xdpf); xdptxdf.dma_arr = NULL; for (i = 0; i < xdptxdf.sinfo->nr_frags; i++) { skb_frag_t *frag = &xdptxdf.sinfo->frags[i]; dma_addr_t addr; u32 len; addr = page_pool_get_dma_addr(skb_frag_page(frag)) + skb_frag_off(frag); len = skb_frag_size(frag); dma_sync_single_for_device(sq->pdev, addr, len, DMA_BIDIRECTIONAL); } } xdptxd->dma_addr = dma_addr; if (unlikely(!INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe, mlx5e_xmit_xdp_frame, sq, xdptxd, 0, NULL))) return false; /* xmit_mode == MLX5E_XDP_XMIT_MODE_PAGE */ mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .mode = MLX5E_XDP_XMIT_MODE_PAGE }); if (xdptxd->has_frags) { mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .page.num = 1 + xdptxdf.sinfo->nr_frags }); mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .page.page = page }); for (i = 0; i < xdptxdf.sinfo->nr_frags; i++) { skb_frag_t *frag = &xdptxdf.sinfo->frags[i]; mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .page.page = skb_frag_page(frag) }); } } else { mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .page.num = 1 }); mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .page.page = page }); } return true; } static int mlx5e_xdp_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp) { const struct mlx5e_xdp_buff *_ctx = (void *)ctx; if (unlikely(!mlx5e_rx_hw_stamp(_ctx->rq->tstamp))) return -ENODATA; *timestamp = mlx5e_cqe_ts_to_ns(_ctx->rq->ptp_cyc2time, _ctx->rq->clock, get_cqe_ts(_ctx->cqe)); return 0; } /* Mapping HW RSS Type bits CQE_RSS_HTYPE_IP + CQE_RSS_HTYPE_L4 into 4-bits*/ #define RSS_TYPE_MAX_TABLE 16 /* 4-bits max 16 entries */ #define RSS_L4 GENMASK(1, 0) #define RSS_L3 GENMASK(3, 2) /* Same as CQE_RSS_HTYPE_IP */ /* Valid combinations of CQE_RSS_HTYPE_IP + CQE_RSS_HTYPE_L4 sorted numerical */ enum mlx5_rss_hash_type { RSS_TYPE_NO_HASH = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IP_NONE) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_NONE)), RSS_TYPE_L3_IPV4 = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV4) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_NONE)), RSS_TYPE_L4_IPV4_TCP = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV4) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_TCP)), RSS_TYPE_L4_IPV4_UDP = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV4) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_UDP)), RSS_TYPE_L4_IPV4_IPSEC = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV4) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_IPSEC)), RSS_TYPE_L3_IPV6 = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV6) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_NONE)), RSS_TYPE_L4_IPV6_TCP = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV6) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_TCP)), RSS_TYPE_L4_IPV6_UDP = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV6) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_UDP)), RSS_TYPE_L4_IPV6_IPSEC = (FIELD_PREP_CONST(RSS_L3, CQE_RSS_IPV6) | FIELD_PREP_CONST(RSS_L4, CQE_RSS_L4_IPSEC)), }; /* Invalid combinations will simply return zero, allows no boundary checks */ static const enum xdp_rss_hash_type mlx5_xdp_rss_type[RSS_TYPE_MAX_TABLE] = { [RSS_TYPE_NO_HASH] = XDP_RSS_TYPE_NONE, [1] = XDP_RSS_TYPE_NONE, /* Implicit zero */ [2] = XDP_RSS_TYPE_NONE, /* Implicit zero */ [3] = XDP_RSS_TYPE_NONE, /* Implicit zero */ [RSS_TYPE_L3_IPV4] = XDP_RSS_TYPE_L3_IPV4, [RSS_TYPE_L4_IPV4_TCP] = XDP_RSS_TYPE_L4_IPV4_TCP, [RSS_TYPE_L4_IPV4_UDP] = XDP_RSS_TYPE_L4_IPV4_UDP, [RSS_TYPE_L4_IPV4_IPSEC] = XDP_RSS_TYPE_L4_IPV4_IPSEC, [RSS_TYPE_L3_IPV6] = XDP_RSS_TYPE_L3_IPV6, [RSS_TYPE_L4_IPV6_TCP] = XDP_RSS_TYPE_L4_IPV6_TCP, [RSS_TYPE_L4_IPV6_UDP] = XDP_RSS_TYPE_L4_IPV6_UDP, [RSS_TYPE_L4_IPV6_IPSEC] = XDP_RSS_TYPE_L4_IPV6_IPSEC, [12] = XDP_RSS_TYPE_NONE, /* Implicit zero */ [13] = XDP_RSS_TYPE_NONE, /* Implicit zero */ [14] = XDP_RSS_TYPE_NONE, /* Implicit zero */ [15] = XDP_RSS_TYPE_NONE, /* Implicit zero */ }; static int mlx5e_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash, enum xdp_rss_hash_type *rss_type) { const struct mlx5e_xdp_buff *_ctx = (void *)ctx; const struct mlx5_cqe64 *cqe = _ctx->cqe; u32 hash_type, l4_type, ip_type, lookup; if (unlikely(!(_ctx->xdp.rxq->dev->features & NETIF_F_RXHASH))) return -ENODATA; *hash = be32_to_cpu(cqe->rss_hash_result); hash_type = cqe->rss_hash_type; BUILD_BUG_ON(CQE_RSS_HTYPE_IP != RSS_L3); /* same mask */ ip_type = hash_type & CQE_RSS_HTYPE_IP; l4_type = FIELD_GET(CQE_RSS_HTYPE_L4, hash_type); lookup = ip_type | l4_type; *rss_type = mlx5_xdp_rss_type[lookup]; return 0; } static int mlx5e_xdp_rx_vlan_tag(const struct xdp_md *ctx, __be16 *vlan_proto, u16 *vlan_tci) { const struct mlx5e_xdp_buff *_ctx = (void *)ctx; const struct mlx5_cqe64 *cqe = _ctx->cqe; if (!cqe_has_vlan(cqe)) return -ENODATA; *vlan_proto = htons(ETH_P_8021Q); *vlan_tci = be16_to_cpu(cqe->vlan_info); return 0; } const struct xdp_metadata_ops mlx5e_xdp_metadata_ops = { .xmo_rx_timestamp = mlx5e_xdp_rx_timestamp, .xmo_rx_hash = mlx5e_xdp_rx_hash, .xmo_rx_vlan_tag = mlx5e_xdp_rx_vlan_tag, }; struct mlx5e_xsk_tx_complete { struct mlx5_cqe64 *cqe; struct mlx5e_cq *cq; }; static u64 mlx5e_xsk_fill_timestamp(void *_priv) { struct mlx5e_xsk_tx_complete *priv = _priv; u64 ts; ts = get_cqe_ts(priv->cqe); if (mlx5_is_real_time_rq(priv->cq->mdev) || mlx5_is_real_time_sq(priv->cq->mdev)) return mlx5_real_time_cyc2time(&priv->cq->mdev->clock, ts); return mlx5_timecounter_cyc2time(&priv->cq->mdev->clock, ts); } static void mlx5e_xsk_request_checksum(u16 csum_start, u16 csum_offset, void *priv) { struct mlx5_wqe_eth_seg *eseg = priv; /* HW/FW is doing parsing, so offsets are largely ignored. */ eseg->cs_flags |= MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM; } const struct xsk_tx_metadata_ops mlx5e_xsk_tx_metadata_ops = { .tmo_fill_timestamp = mlx5e_xsk_fill_timestamp, .tmo_request_checksum = mlx5e_xsk_request_checksum, }; /* returns true if packet was consumed by xdp */ bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct bpf_prog *prog, struct mlx5e_xdp_buff *mxbuf) { struct xdp_buff *xdp = &mxbuf->xdp; u32 act; int err; act = bpf_prog_run_xdp(prog, xdp); switch (act) { case XDP_PASS: return false; case XDP_TX: if (unlikely(!mlx5e_xmit_xdp_buff(rq->xdpsq, rq, xdp))) goto xdp_abort; __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); /* non-atomic */ return true; case XDP_REDIRECT: /* When XDP enabled then page-refcnt==1 here */ err = xdp_do_redirect(rq->netdev, xdp, prog); if (unlikely(err)) goto xdp_abort; __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); __set_bit(MLX5E_RQ_FLAG_XDP_REDIRECT, rq->flags); rq->stats->xdp_redirect++; return true; default: bpf_warn_invalid_xdp_action(rq->netdev, prog, act); fallthrough; case XDP_ABORTED: xdp_abort: trace_xdp_exception(rq->netdev, prog, act); fallthrough; case XDP_DROP: rq->stats->xdp_drop++; return true; } } static u16 mlx5e_xdpsq_get_next_pi(struct mlx5e_xdpsq *sq, u16 size) { struct mlx5_wq_cyc *wq = &sq->wq; u16 pi, contig_wqebbs; pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); contig_wqebbs = mlx5_wq_cyc_get_contig_wqebbs(wq, pi); if (unlikely(contig_wqebbs < size)) { struct mlx5e_xdp_wqe_info *wi, *edge_wi; wi = &sq->db.wqe_info[pi]; edge_wi = wi + contig_wqebbs; /* Fill SQ frag edge with NOPs to avoid WQE wrapping two pages. */ for (; wi < edge_wi; wi++) { *wi = (struct mlx5e_xdp_wqe_info) { .num_wqebbs = 1, .num_pkts = 0, }; mlx5e_post_nop(wq, sq->sqn, &sq->pc); } sq->stats->nops += contig_wqebbs; pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); } return pi; } static void mlx5e_xdp_mpwqe_session_start(struct mlx5e_xdpsq *sq) { struct mlx5e_tx_mpwqe *session = &sq->mpwqe; struct mlx5e_xdpsq_stats *stats = sq->stats; struct mlx5e_tx_wqe *wqe; u16 pi; pi = mlx5e_xdpsq_get_next_pi(sq, sq->max_sq_mpw_wqebbs); wqe = MLX5E_TX_FETCH_WQE(sq, pi); net_prefetchw(wqe->data); *session = (struct mlx5e_tx_mpwqe) { .wqe = wqe, .bytes_count = 0, .ds_count = MLX5E_TX_WQE_EMPTY_DS_COUNT, .pkt_count = 0, .inline_on = mlx5e_xdp_get_inline_state(sq, session->inline_on), }; stats->mpwqe++; } void mlx5e_xdp_mpwqe_complete(struct mlx5e_xdpsq *sq) { struct mlx5_wq_cyc *wq = &sq->wq; struct mlx5e_tx_mpwqe *session = &sq->mpwqe; struct mlx5_wqe_ctrl_seg *cseg = &session->wqe->ctrl; u16 ds_count = session->ds_count; u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); struct mlx5e_xdp_wqe_info *wi = &sq->db.wqe_info[pi]; cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_ENHANCED_MPSW); cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_count); wi->num_wqebbs = DIV_ROUND_UP(ds_count, MLX5_SEND_WQEBB_NUM_DS); wi->num_pkts = session->pkt_count; sq->pc += wi->num_wqebbs; sq->doorbell_cseg = cseg; session->wqe = NULL; /* Close session */ } enum { MLX5E_XDP_CHECK_OK = 1, MLX5E_XDP_CHECK_START_MPWQE = 2, }; INDIRECT_CALLABLE_SCOPE int mlx5e_xmit_xdp_frame_check_mpwqe(struct mlx5e_xdpsq *sq) { if (unlikely(!sq->mpwqe.wqe)) { if (unlikely(!mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, sq->stop_room))) { /* SQ is full, ring doorbell */ mlx5e_xmit_xdp_doorbell(sq); sq->stats->full++; return -EBUSY; } return MLX5E_XDP_CHECK_START_MPWQE; } return MLX5E_XDP_CHECK_OK; } INDIRECT_CALLABLE_SCOPE bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd, int check_result, struct xsk_tx_metadata *meta); INDIRECT_CALLABLE_SCOPE bool mlx5e_xmit_xdp_frame_mpwqe(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd, int check_result, struct xsk_tx_metadata *meta) { struct mlx5e_tx_mpwqe *session = &sq->mpwqe; struct mlx5e_xdpsq_stats *stats = sq->stats; struct mlx5e_xmit_data *p = xdptxd; struct mlx5e_xmit_data tmp; if (xdptxd->has_frags) { struct mlx5e_xmit_data_frags *xdptxdf = container_of(xdptxd, struct mlx5e_xmit_data_frags, xd); if (!!xdptxd->len + xdptxdf->sinfo->nr_frags > 1) { /* MPWQE is enabled, but a multi-buffer packet is queued for * transmission. MPWQE can't send fragmented packets, so close * the current session and fall back to a regular WQE. */ if (unlikely(sq->mpwqe.wqe)) mlx5e_xdp_mpwqe_complete(sq); return mlx5e_xmit_xdp_frame(sq, xdptxd, 0, meta); } if (!xdptxd->len) { skb_frag_t *frag = &xdptxdf->sinfo->frags[0]; tmp.data = skb_frag_address(frag); tmp.len = skb_frag_size(frag); tmp.dma_addr = xdptxdf->dma_arr ? xdptxdf->dma_arr[0] : page_pool_get_dma_addr(skb_frag_page(frag)) + skb_frag_off(frag); p = &tmp; } } if (unlikely(p->len > sq->hw_mtu)) { stats->err++; return false; } if (!check_result) check_result = mlx5e_xmit_xdp_frame_check_mpwqe(sq); if (unlikely(check_result < 0)) return false; if (check_result == MLX5E_XDP_CHECK_START_MPWQE) { /* Start the session when nothing can fail, so it's guaranteed * that if there is an active session, it has at least one dseg, * and it's safe to complete it at any time. */ mlx5e_xdp_mpwqe_session_start(sq); xsk_tx_metadata_request(meta, &mlx5e_xsk_tx_metadata_ops, &session->wqe->eth); } mlx5e_xdp_mpwqe_add_dseg(sq, p, stats); if (unlikely(mlx5e_xdp_mpwqe_is_full(session, sq->max_sq_mpw_wqebbs))) mlx5e_xdp_mpwqe_complete(sq); stats->xmit++; return true; } static int mlx5e_xmit_xdp_frame_check_stop_room(struct mlx5e_xdpsq *sq, int stop_room) { if (unlikely(!mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, stop_room))) { /* SQ is full, ring doorbell */ mlx5e_xmit_xdp_doorbell(sq); sq->stats->full++; return -EBUSY; } return MLX5E_XDP_CHECK_OK; } INDIRECT_CALLABLE_SCOPE int mlx5e_xmit_xdp_frame_check(struct mlx5e_xdpsq *sq) { return mlx5e_xmit_xdp_frame_check_stop_room(sq, 1); } INDIRECT_CALLABLE_SCOPE bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd, int check_result, struct xsk_tx_metadata *meta) { struct mlx5e_xmit_data_frags *xdptxdf = container_of(xdptxd, struct mlx5e_xmit_data_frags, xd); struct mlx5_wq_cyc *wq = &sq->wq; struct mlx5_wqe_ctrl_seg *cseg; struct mlx5_wqe_data_seg *dseg; struct mlx5_wqe_eth_seg *eseg; struct mlx5e_tx_wqe *wqe; dma_addr_t dma_addr = xdptxd->dma_addr; u32 dma_len = xdptxd->len; u16 ds_cnt, inline_hdr_sz; unsigned int frags_size; u8 num_wqebbs = 1; int num_frags = 0; bool inline_ok; bool linear; u16 pi; struct mlx5e_xdpsq_stats *stats = sq->stats; inline_ok = sq->min_inline_mode == MLX5_INLINE_MODE_NONE || dma_len >= MLX5E_XDP_MIN_INLINE; frags_size = xdptxd->has_frags ? xdptxdf->sinfo->xdp_frags_size : 0; if (unlikely(!inline_ok || sq->hw_mtu < dma_len + frags_size)) { stats->err++; return false; } inline_hdr_sz = 0; if (sq->min_inline_mode != MLX5_INLINE_MODE_NONE) inline_hdr_sz = MLX5E_XDP_MIN_INLINE; linear = !!(dma_len - inline_hdr_sz); ds_cnt = MLX5E_TX_WQE_EMPTY_DS_COUNT + linear + !!inline_hdr_sz; /* check_result must be 0 if xdptxd->has_frags is true. */ if (!check_result) { int stop_room = 1; if (xdptxd->has_frags) { ds_cnt += xdptxdf->sinfo->nr_frags; num_frags = xdptxdf->sinfo->nr_frags; num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS); /* Assuming MLX5_CAP_GEN(mdev, max_wqe_sz_sq) is big * enough to hold all fragments. */ stop_room = MLX5E_STOP_ROOM(num_wqebbs); } check_result = mlx5e_xmit_xdp_frame_check_stop_room(sq, stop_room); } if (unlikely(check_result < 0)) return false; pi = mlx5e_xdpsq_get_next_pi(sq, num_wqebbs); wqe = mlx5_wq_cyc_get_wqe(wq, pi); net_prefetchw(wqe); cseg = &wqe->ctrl; eseg = &wqe->eth; dseg = wqe->data; /* copy the inline part if required */ if (inline_hdr_sz) { memcpy(eseg->inline_hdr.start, xdptxd->data, sizeof(eseg->inline_hdr.start)); memcpy(dseg, xdptxd->data + sizeof(eseg->inline_hdr.start), inline_hdr_sz - sizeof(eseg->inline_hdr.start)); dma_len -= inline_hdr_sz; dma_addr += inline_hdr_sz; dseg++; } /* write the dma part */ if (linear) { dseg->addr = cpu_to_be64(dma_addr); dseg->byte_count = cpu_to_be32(dma_len); dseg->lkey = sq->mkey_be; dseg++; } cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_SEND); if (test_bit(MLX5E_SQ_STATE_XDP_MULTIBUF, &sq->state)) { int i; memset(&cseg->trailer, 0, sizeof(cseg->trailer)); memset(eseg, 0, sizeof(*eseg) - sizeof(eseg->trailer)); eseg->inline_hdr.sz = cpu_to_be16(inline_hdr_sz); for (i = 0; i < num_frags; i++) { skb_frag_t *frag = &xdptxdf->sinfo->frags[i]; dma_addr_t addr; addr = xdptxdf->dma_arr ? xdptxdf->dma_arr[i] : page_pool_get_dma_addr(skb_frag_page(frag)) + skb_frag_off(frag); dseg->addr = cpu_to_be64(addr); dseg->byte_count = cpu_to_be32(skb_frag_size(frag)); dseg->lkey = sq->mkey_be; dseg++; } cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt); sq->db.wqe_info[pi] = (struct mlx5e_xdp_wqe_info) { .num_wqebbs = num_wqebbs, .num_pkts = 1, }; sq->pc += num_wqebbs; } else { cseg->fm_ce_se = 0; sq->pc++; } xsk_tx_metadata_request(meta, &mlx5e_xsk_tx_metadata_ops, eseg); sq->doorbell_cseg = cseg; stats->xmit++; return true; } static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_wqe_info *wi, u32 *xsk_frames, struct xdp_frame_bulk *bq, struct mlx5e_cq *cq, struct mlx5_cqe64 *cqe) { struct mlx5e_xdp_info_fifo *xdpi_fifo = &sq->db.xdpi_fifo; u16 i; for (i = 0; i < wi->num_pkts; i++) { union mlx5e_xdp_info xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); switch (xdpi.mode) { case MLX5E_XDP_XMIT_MODE_FRAME: { /* XDP_TX from the XSK RQ and XDP_REDIRECT */ struct xdp_frame *xdpf; dma_addr_t dma_addr; xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); xdpf = xdpi.frame.xdpf; xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); dma_addr = xdpi.frame.dma_addr; dma_unmap_single(sq->pdev, dma_addr, xdpf->len, DMA_TO_DEVICE); if (xdp_frame_has_frags(xdpf)) { struct skb_shared_info *sinfo; int j; sinfo = xdp_get_shared_info_from_frame(xdpf); for (j = 0; j < sinfo->nr_frags; j++) { skb_frag_t *frag = &sinfo->frags[j]; xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); dma_addr = xdpi.frame.dma_addr; dma_unmap_single(sq->pdev, dma_addr, skb_frag_size(frag), DMA_TO_DEVICE); } } xdp_return_frame_bulk(xdpf, bq); break; } case MLX5E_XDP_XMIT_MODE_PAGE: { /* XDP_TX from the regular RQ */ u8 num, n = 0; xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); num = xdpi.page.num; do { struct page *page; xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); page = xdpi.page.page; /* No need to check ((page->pp_magic & ~0x3UL) == PP_SIGNATURE) * as we know this is a page_pool page. */ page_pool_recycle_direct(page->pp, page); } while (++n < num); break; } case MLX5E_XDP_XMIT_MODE_XSK: { /* AF_XDP send */ struct xsk_tx_metadata_compl *compl = NULL; struct mlx5e_xsk_tx_complete priv = { .cqe = cqe, .cq = cq, }; if (xp_tx_metadata_enabled(sq->xsk_pool)) { xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); compl = &xdpi.xsk_meta; xsk_tx_metadata_complete(compl, &mlx5e_xsk_tx_metadata_ops, &priv); } (*xsk_frames)++; break; } default: WARN_ON_ONCE(true); } } } bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq) { struct xdp_frame_bulk bq; struct mlx5e_xdpsq *sq; struct mlx5_cqe64 *cqe; u32 xsk_frames = 0; u16 sqcc; int i; xdp_frame_bulk_init(&bq); sq = container_of(cq, struct mlx5e_xdpsq, cq); if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state))) return false; cqe = mlx5_cqwq_get_cqe(&cq->wq); if (!cqe) return false; /* sq->cc must be updated only after mlx5_cqwq_update_db_record(), * otherwise a cq overrun may occur */ sqcc = sq->cc; i = 0; do { struct mlx5e_xdp_wqe_info *wi; u16 wqe_counter, ci; bool last_wqe; mlx5_cqwq_pop(&cq->wq); wqe_counter = be16_to_cpu(cqe->wqe_counter); do { last_wqe = (sqcc == wqe_counter); ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc); wi = &sq->db.wqe_info[ci]; sqcc += wi->num_wqebbs; mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, &bq, cq, cqe); } while (!last_wqe); if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) { netdev_WARN_ONCE(sq->channel->netdev, "Bad OP in XDPSQ CQE: 0x%x\n", get_cqe_opcode(cqe)); mlx5e_dump_error_cqe(&sq->cq, sq->sqn, (struct mlx5_err_cqe *)cqe); mlx5_wq_cyc_wqe_dump(&sq->wq, ci, wi->num_wqebbs); } } while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq))); xdp_flush_frame_bulk(&bq); if (xsk_frames) xsk_tx_completed(sq->xsk_pool, xsk_frames); sq->stats->cqes += i; mlx5_cqwq_update_db_record(&cq->wq); /* ensure cq space is freed before enabling more cqes */ wmb(); sq->cc = sqcc; return (i == MLX5E_TX_CQ_POLL_BUDGET); } void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq) { struct xdp_frame_bulk bq; u32 xsk_frames = 0; xdp_frame_bulk_init(&bq); rcu_read_lock(); /* need for xdp_return_frame_bulk */ while (sq->cc != sq->pc) { struct mlx5e_xdp_wqe_info *wi; u16 ci; ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->cc); wi = &sq->db.wqe_info[ci]; sq->cc += wi->num_wqebbs; mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, &bq, NULL, NULL); } xdp_flush_frame_bulk(&bq); rcu_read_unlock(); if (xsk_frames) xsk_tx_completed(sq->xsk_pool, xsk_frames); } int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, u32 flags) { struct mlx5e_priv *priv = netdev_priv(dev); struct mlx5e_xdpsq *sq; int nxmit = 0; int sq_num; int i; /* this flag is sufficient, no need to test internal sq state */ if (unlikely(!mlx5e_xdp_tx_is_enabled(priv))) return -ENETDOWN; if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) return -EINVAL; sq_num = smp_processor_id(); if (unlikely(sq_num >= priv->channels.num)) return -ENXIO; sq = &priv->channels.c[sq_num]->xdpsq; for (i = 0; i < n; i++) { struct mlx5e_xmit_data_frags xdptxdf = {}; struct xdp_frame *xdpf = frames[i]; dma_addr_t dma_arr[MAX_SKB_FRAGS]; struct mlx5e_xmit_data *xdptxd; bool ret; xdptxd = &xdptxdf.xd; xdptxd->data = xdpf->data; xdptxd->len = xdpf->len; xdptxd->has_frags = xdp_frame_has_frags(xdpf); xdptxd->dma_addr = dma_map_single(sq->pdev, xdptxd->data, xdptxd->len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(sq->pdev, xdptxd->dma_addr))) break; if (xdptxd->has_frags) { int j; xdptxdf.sinfo = xdp_get_shared_info_from_frame(xdpf); xdptxdf.dma_arr = dma_arr; for (j = 0; j < xdptxdf.sinfo->nr_frags; j++) { skb_frag_t *frag = &xdptxdf.sinfo->frags[j]; dma_arr[j] = dma_map_single(sq->pdev, skb_frag_address(frag), skb_frag_size(frag), DMA_TO_DEVICE); if (!dma_mapping_error(sq->pdev, dma_arr[j])) continue; /* mapping error */ while (--j >= 0) dma_unmap_single(sq->pdev, dma_arr[j], skb_frag_size(&xdptxdf.sinfo->frags[j]), DMA_TO_DEVICE); goto out; } } ret = INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe, mlx5e_xmit_xdp_frame, sq, xdptxd, 0, NULL); if (unlikely(!ret)) { int j; dma_unmap_single(sq->pdev, xdptxd->dma_addr, xdptxd->len, DMA_TO_DEVICE); if (!xdptxd->has_frags) break; for (j = 0; j < xdptxdf.sinfo->nr_frags; j++) dma_unmap_single(sq->pdev, dma_arr[j], skb_frag_size(&xdptxdf.sinfo->frags[j]), DMA_TO_DEVICE); break; } /* xmit_mode == MLX5E_XDP_XMIT_MODE_FRAME */ mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .mode = MLX5E_XDP_XMIT_MODE_FRAME }); mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .frame.xdpf = xdpf }); mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .frame.dma_addr = xdptxd->dma_addr }); if (xdptxd->has_frags) { int j; for (j = 0; j < xdptxdf.sinfo->nr_frags; j++) mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, (union mlx5e_xdp_info) { .frame.dma_addr = dma_arr[j] }); } nxmit++; } out: if (sq->mpwqe.wqe) mlx5e_xdp_mpwqe_complete(sq); if (flags & XDP_XMIT_FLUSH) mlx5e_xmit_xdp_doorbell(sq); return nxmit; } void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq) { struct mlx5e_xdpsq *xdpsq = rq->xdpsq; if (xdpsq->mpwqe.wqe) mlx5e_xdp_mpwqe_complete(xdpsq); mlx5e_xmit_xdp_doorbell(xdpsq); if (test_bit(MLX5E_RQ_FLAG_XDP_REDIRECT, rq->flags)) { xdp_do_flush(); __clear_bit(MLX5E_RQ_FLAG_XDP_REDIRECT, rq->flags); } } void mlx5e_set_xmit_fp(struct mlx5e_xdpsq *sq, bool is_mpw) { sq->xmit_xdp_frame_check = is_mpw ? mlx5e_xmit_xdp_frame_check_mpwqe : mlx5e_xmit_xdp_frame_check; sq->xmit_xdp_frame = is_mpw ? mlx5e_xmit_xdp_frame_mpwqe : mlx5e_xmit_xdp_frame; }
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