1159d2131STariq Toukan /* 2159d2131STariq Toukan * Copyright (c) 2018, Mellanox Technologies. All rights reserved. 3159d2131STariq Toukan * 4159d2131STariq Toukan * This software is available to you under a choice of one of two 5159d2131STariq Toukan * licenses. You may choose to be licensed under the terms of the GNU 6159d2131STariq Toukan * General Public License (GPL) Version 2, available from the file 7159d2131STariq Toukan * COPYING in the main directory of this source tree, or the 8159d2131STariq Toukan * OpenIB.org BSD license below: 9159d2131STariq Toukan * 10159d2131STariq Toukan * Redistribution and use in source and binary forms, with or 11159d2131STariq Toukan * without modification, are permitted provided that the following 12159d2131STariq Toukan * conditions are met: 13159d2131STariq Toukan * 14159d2131STariq Toukan * - Redistributions of source code must retain the above 15159d2131STariq Toukan * copyright notice, this list of conditions and the following 16159d2131STariq Toukan * disclaimer. 17159d2131STariq Toukan * 18159d2131STariq Toukan * - Redistributions in binary form must reproduce the above 19159d2131STariq Toukan * copyright notice, this list of conditions and the following 20159d2131STariq Toukan * disclaimer in the documentation and/or other materials 21159d2131STariq Toukan * provided with the distribution. 22159d2131STariq Toukan * 23159d2131STariq Toukan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24159d2131STariq Toukan * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25159d2131STariq Toukan * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26159d2131STariq Toukan * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27159d2131STariq Toukan * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28159d2131STariq Toukan * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29159d2131STariq Toukan * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30159d2131STariq Toukan * SOFTWARE. 31159d2131STariq Toukan */ 32159d2131STariq Toukan 33159d2131STariq Toukan #include <linux/bpf_trace.h> 34a71506a4SMagnus Karlsson #include <net/xdp_sock_drv.h> 35159d2131STariq Toukan #include "en/xdp.h" 36a011b49fSMaxim Mikityanskiy #include "en/params.h" 37159d2131STariq Toukan 38a011b49fSMaxim Mikityanskiy int mlx5e_xdp_max_mtu(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk) 39d460c271SMaxim Mikityanskiy { 40a011b49fSMaxim Mikityanskiy int hr = mlx5e_get_linear_rq_headroom(params, xsk); 41d460c271SMaxim Mikityanskiy 42d460c271SMaxim Mikityanskiy /* Let S := SKB_DATA_ALIGN(sizeof(struct skb_shared_info)). 43d460c271SMaxim Mikityanskiy * The condition checked in mlx5e_rx_is_linear_skb is: 44d460c271SMaxim Mikityanskiy * SKB_DATA_ALIGN(sw_mtu + hard_mtu + hr) + S <= PAGE_SIZE (1) 45d460c271SMaxim Mikityanskiy * (Note that hw_mtu == sw_mtu + hard_mtu.) 46d460c271SMaxim Mikityanskiy * What is returned from this function is: 47d460c271SMaxim Mikityanskiy * max_mtu = PAGE_SIZE - S - hr - hard_mtu (2) 48d460c271SMaxim Mikityanskiy * After assigning sw_mtu := max_mtu, the left side of (1) turns to 49d460c271SMaxim Mikityanskiy * SKB_DATA_ALIGN(PAGE_SIZE - S) + S, which is equal to PAGE_SIZE, 50d460c271SMaxim Mikityanskiy * because both PAGE_SIZE and S are already aligned. Any number greater 51d460c271SMaxim Mikityanskiy * than max_mtu would make the left side of (1) greater than PAGE_SIZE, 52d460c271SMaxim Mikityanskiy * so max_mtu is the maximum MTU allowed. 53d460c271SMaxim Mikityanskiy */ 54d460c271SMaxim Mikityanskiy 55d460c271SMaxim Mikityanskiy return MLX5E_HW2SW_MTU(params, SKB_MAX_HEAD(hr)); 56d460c271SMaxim Mikityanskiy } 57d460c271SMaxim Mikityanskiy 58c94e4f11STariq Toukan static inline bool 59b9673cf5SMaxim Mikityanskiy mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq, 60*bfc63c97STariq Toukan struct xdp_buff *xdp) 61c94e4f11STariq Toukan { 62*bfc63c97STariq Toukan struct page *page = virt_to_page(xdp->data); 63a48ad58cSMaxim Mikityanskiy struct skb_shared_info *sinfo = NULL; 64b39fe61eSMaxim Mikityanskiy struct mlx5e_xmit_data xdptxd; 65c94e4f11STariq Toukan struct mlx5e_xdp_info xdpi; 66d963fa15SMaxim Mikityanskiy struct xdp_frame *xdpf; 67d963fa15SMaxim Mikityanskiy dma_addr_t dma_addr; 68a48ad58cSMaxim Mikityanskiy int i; 69c94e4f11STariq Toukan 701b698fa5SLorenzo Bianconi xdpf = xdp_convert_buff_to_frame(xdp); 71d963fa15SMaxim Mikityanskiy if (unlikely(!xdpf)) 72c94e4f11STariq Toukan return false; 73c94e4f11STariq Toukan 74d963fa15SMaxim Mikityanskiy xdptxd.data = xdpf->data; 75d963fa15SMaxim Mikityanskiy xdptxd.len = xdpf->len; 76d963fa15SMaxim Mikityanskiy 7739d6443cSBjörn Töpel if (xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL) { 7884a0a231SMaxim Mikityanskiy /* The xdp_buff was in the UMEM and was copied into a newly 7984a0a231SMaxim Mikityanskiy * allocated page. The UMEM page was returned via the ZCA, and 8084a0a231SMaxim Mikityanskiy * this new page has to be mapped at this point and has to be 8184a0a231SMaxim Mikityanskiy * unmapped and returned via xdp_return_frame on completion. 8284a0a231SMaxim Mikityanskiy */ 8384a0a231SMaxim Mikityanskiy 8484a0a231SMaxim Mikityanskiy /* Prevent double recycling of the UMEM page. Even in case this 8584a0a231SMaxim Mikityanskiy * function returns false, the xdp_buff shouldn't be recycled, 8684a0a231SMaxim Mikityanskiy * as it was already done in xdp_convert_zc_to_xdp_frame. 8784a0a231SMaxim Mikityanskiy */ 8884a0a231SMaxim Mikityanskiy __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); /* non-atomic */ 8984a0a231SMaxim Mikityanskiy 9084a0a231SMaxim Mikityanskiy xdpi.mode = MLX5E_XDP_XMIT_MODE_FRAME; 9184a0a231SMaxim Mikityanskiy 9284a0a231SMaxim Mikityanskiy dma_addr = dma_map_single(sq->pdev, xdptxd.data, xdptxd.len, 9384a0a231SMaxim Mikityanskiy DMA_TO_DEVICE); 9484a0a231SMaxim Mikityanskiy if (dma_mapping_error(sq->pdev, dma_addr)) { 9584a0a231SMaxim Mikityanskiy xdp_return_frame(xdpf); 9684a0a231SMaxim Mikityanskiy return false; 9784a0a231SMaxim Mikityanskiy } 9884a0a231SMaxim Mikityanskiy 9984a0a231SMaxim Mikityanskiy xdptxd.dma_addr = dma_addr; 10084a0a231SMaxim Mikityanskiy xdpi.frame.xdpf = xdpf; 10184a0a231SMaxim Mikityanskiy xdpi.frame.dma_addr = dma_addr; 102fbeed25bSMaxim Mikityanskiy 103fbeed25bSMaxim Mikityanskiy if (unlikely(!INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe, 104fbeed25bSMaxim Mikityanskiy mlx5e_xmit_xdp_frame, sq, &xdptxd, NULL, 0))) 105fbeed25bSMaxim Mikityanskiy return false; 106fbeed25bSMaxim Mikityanskiy 107fbeed25bSMaxim Mikityanskiy mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, &xdpi); 108fbeed25bSMaxim Mikityanskiy return true; 109fbeed25bSMaxim Mikityanskiy } 110fbeed25bSMaxim Mikityanskiy 111fbeed25bSMaxim Mikityanskiy /* Driver assumes that xdp_convert_buff_to_frame returns an xdp_frame 112fbeed25bSMaxim Mikityanskiy * that points to the same memory region as the original xdp_buff. It 113fbeed25bSMaxim Mikityanskiy * allows to map the memory only once and to use the DMA_BIDIRECTIONAL 114fbeed25bSMaxim Mikityanskiy * mode. 11584a0a231SMaxim Mikityanskiy */ 11684a0a231SMaxim Mikityanskiy 117d963fa15SMaxim Mikityanskiy xdpi.mode = MLX5E_XDP_XMIT_MODE_PAGE; 118a48ad58cSMaxim Mikityanskiy xdpi.page.rq = rq; 119d963fa15SMaxim Mikityanskiy 120ddc87e7dSMaxim Mikityanskiy dma_addr = page_pool_get_dma_addr(page) + (xdpf->data - (void *)xdpf); 1218d4b475eSMaxim Mikityanskiy dma_sync_single_for_device(sq->pdev, dma_addr, xdptxd.len, DMA_BIDIRECTIONAL); 122d963fa15SMaxim Mikityanskiy 123a48ad58cSMaxim Mikityanskiy if (unlikely(xdp_frame_has_frags(xdpf))) { 124a48ad58cSMaxim Mikityanskiy sinfo = xdp_get_shared_info_from_frame(xdpf); 125a48ad58cSMaxim Mikityanskiy 126a48ad58cSMaxim Mikityanskiy for (i = 0; i < sinfo->nr_frags; i++) { 127a48ad58cSMaxim Mikityanskiy skb_frag_t *frag = &sinfo->frags[i]; 128a48ad58cSMaxim Mikityanskiy dma_addr_t addr; 129a48ad58cSMaxim Mikityanskiy u32 len; 130a48ad58cSMaxim Mikityanskiy 131a48ad58cSMaxim Mikityanskiy addr = page_pool_get_dma_addr(skb_frag_page(frag)) + 132a48ad58cSMaxim Mikityanskiy skb_frag_off(frag); 133a48ad58cSMaxim Mikityanskiy len = skb_frag_size(frag); 134a48ad58cSMaxim Mikityanskiy dma_sync_single_for_device(sq->pdev, addr, len, 1358d4b475eSMaxim Mikityanskiy DMA_BIDIRECTIONAL); 136a48ad58cSMaxim Mikityanskiy } 137a48ad58cSMaxim Mikityanskiy } 138a48ad58cSMaxim Mikityanskiy 139d963fa15SMaxim Mikityanskiy xdptxd.dma_addr = dma_addr; 140d963fa15SMaxim Mikityanskiy 14149529a17SMaxim Mikityanskiy if (unlikely(!INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe, 142a48ad58cSMaxim Mikityanskiy mlx5e_xmit_xdp_frame, sq, &xdptxd, sinfo, 0))) 14349529a17SMaxim Mikityanskiy return false; 14449529a17SMaxim Mikityanskiy 145a48ad58cSMaxim Mikityanskiy xdpi.page.page = page; 14649529a17SMaxim Mikityanskiy mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, &xdpi); 147a48ad58cSMaxim Mikityanskiy 148a48ad58cSMaxim Mikityanskiy if (unlikely(xdp_frame_has_frags(xdpf))) { 149a48ad58cSMaxim Mikityanskiy for (i = 0; i < sinfo->nr_frags; i++) { 150a48ad58cSMaxim Mikityanskiy skb_frag_t *frag = &sinfo->frags[i]; 151a48ad58cSMaxim Mikityanskiy 152a48ad58cSMaxim Mikityanskiy xdpi.page.page = skb_frag_page(frag); 153a48ad58cSMaxim Mikityanskiy mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, &xdpi); 154a48ad58cSMaxim Mikityanskiy } 155a48ad58cSMaxim Mikityanskiy } 156a48ad58cSMaxim Mikityanskiy 15749529a17SMaxim Mikityanskiy return true; 158c94e4f11STariq Toukan } 159c94e4f11STariq Toukan 160bc8d405bSToke Høiland-Jørgensen static int mlx5e_xdp_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp) 161bc8d405bSToke Høiland-Jørgensen { 162bc8d405bSToke Høiland-Jørgensen const struct mlx5e_xdp_buff *_ctx = (void *)ctx; 163bc8d405bSToke Høiland-Jørgensen 164bc8d405bSToke Høiland-Jørgensen if (unlikely(!mlx5e_rx_hw_stamp(_ctx->rq->tstamp))) 165bc8d405bSToke Høiland-Jørgensen return -EOPNOTSUPP; 166bc8d405bSToke Høiland-Jørgensen 167bc8d405bSToke Høiland-Jørgensen *timestamp = mlx5e_cqe_ts_to_ns(_ctx->rq->ptp_cyc2time, 168bc8d405bSToke Høiland-Jørgensen _ctx->rq->clock, get_cqe_ts(_ctx->cqe)); 169bc8d405bSToke Høiland-Jørgensen return 0; 170bc8d405bSToke Høiland-Jørgensen } 171bc8d405bSToke Høiland-Jørgensen 172bc8d405bSToke Høiland-Jørgensen static int mlx5e_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash) 173bc8d405bSToke Høiland-Jørgensen { 174bc8d405bSToke Høiland-Jørgensen const struct mlx5e_xdp_buff *_ctx = (void *)ctx; 175bc8d405bSToke Høiland-Jørgensen 176bc8d405bSToke Høiland-Jørgensen if (unlikely(!(_ctx->xdp.rxq->dev->features & NETIF_F_RXHASH))) 177bc8d405bSToke Høiland-Jørgensen return -EOPNOTSUPP; 178bc8d405bSToke Høiland-Jørgensen 179bc8d405bSToke Høiland-Jørgensen *hash = be32_to_cpu(_ctx->cqe->rss_hash_result); 180bc8d405bSToke Høiland-Jørgensen return 0; 181bc8d405bSToke Høiland-Jørgensen } 182bc8d405bSToke Høiland-Jørgensen 183bc8d405bSToke Høiland-Jørgensen const struct xdp_metadata_ops mlx5e_xdp_metadata_ops = { 184bc8d405bSToke Høiland-Jørgensen .xmo_rx_timestamp = mlx5e_xdp_rx_timestamp, 185bc8d405bSToke Høiland-Jørgensen .xmo_rx_hash = mlx5e_xdp_rx_hash, 186bc8d405bSToke Høiland-Jørgensen }; 187bc8d405bSToke Høiland-Jørgensen 188159d2131STariq Toukan /* returns true if packet was consumed by xdp */ 189ddc87e7dSMaxim Mikityanskiy bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct page *page, 190384a13caSToke Høiland-Jørgensen struct bpf_prog *prog, struct mlx5e_xdp_buff *mxbuf) 191159d2131STariq Toukan { 192384a13caSToke Høiland-Jørgensen struct xdp_buff *xdp = &mxbuf->xdp; 193159d2131STariq Toukan u32 act; 194159d2131STariq Toukan int err; 195159d2131STariq Toukan 19639d6443cSBjörn Töpel act = bpf_prog_run_xdp(prog, xdp); 197159d2131STariq Toukan switch (act) { 198159d2131STariq Toukan case XDP_PASS: 199159d2131STariq Toukan return false; 200159d2131STariq Toukan case XDP_TX: 201*bfc63c97STariq Toukan if (unlikely(!mlx5e_xmit_xdp_buff(rq->xdpsq, rq, xdp))) 202c94e4f11STariq Toukan goto xdp_abort; 203c94e4f11STariq Toukan __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); /* non-atomic */ 204159d2131STariq Toukan return true; 205159d2131STariq Toukan case XDP_REDIRECT: 206159d2131STariq Toukan /* When XDP enabled then page-refcnt==1 here */ 20739d6443cSBjörn Töpel err = xdp_do_redirect(rq->netdev, xdp, prog); 208c94e4f11STariq Toukan if (unlikely(err)) 209c94e4f11STariq Toukan goto xdp_abort; 210159d2131STariq Toukan __set_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags); 21115143bf5STariq Toukan __set_bit(MLX5E_RQ_FLAG_XDP_REDIRECT, rq->flags); 21239d6443cSBjörn Töpel if (xdp->rxq->mem.type != MEM_TYPE_XSK_BUFF_POOL) 213ddc87e7dSMaxim Mikityanskiy mlx5e_page_dma_unmap(rq, page); 21486690b4bSTariq Toukan rq->stats->xdp_redirect++; 215159d2131STariq Toukan return true; 216159d2131STariq Toukan default: 217c8064e5bSPaolo Abeni bpf_warn_invalid_xdp_action(rq->netdev, prog, act); 218c8b838d1SGustavo A. R. Silva fallthrough; 219159d2131STariq Toukan case XDP_ABORTED: 220c94e4f11STariq Toukan xdp_abort: 221159d2131STariq Toukan trace_xdp_exception(rq->netdev, prog, act); 222c8b838d1SGustavo A. R. Silva fallthrough; 223159d2131STariq Toukan case XDP_DROP: 224159d2131STariq Toukan rq->stats->xdp_drop++; 225159d2131STariq Toukan return true; 226159d2131STariq Toukan } 227159d2131STariq Toukan } 228159d2131STariq Toukan 229ec9cdca0SMaxim Mikityanskiy static u16 mlx5e_xdpsq_get_next_pi(struct mlx5e_xdpsq *sq, u16 size) 2305e0d2eefSTariq Toukan { 2315e0d2eefSTariq Toukan struct mlx5_wq_cyc *wq = &sq->wq; 2326c085a8aSShay Agroskin u16 pi, contig_wqebbs; 2336c085a8aSShay Agroskin 2346c085a8aSShay Agroskin pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); 2356c085a8aSShay Agroskin contig_wqebbs = mlx5_wq_cyc_get_contig_wqebbs(wq, pi); 236ec9cdca0SMaxim Mikityanskiy if (unlikely(contig_wqebbs < size)) { 237ec9cdca0SMaxim Mikityanskiy struct mlx5e_xdp_wqe_info *wi, *edge_wi; 2386c085a8aSShay Agroskin 239ec9cdca0SMaxim Mikityanskiy wi = &sq->db.wqe_info[pi]; 240ec9cdca0SMaxim Mikityanskiy edge_wi = wi + contig_wqebbs; 241ec9cdca0SMaxim Mikityanskiy 242ec9cdca0SMaxim Mikityanskiy /* Fill SQ frag edge with NOPs to avoid WQE wrapping two pages. */ 243ec9cdca0SMaxim Mikityanskiy for (; wi < edge_wi; wi++) { 244ec9cdca0SMaxim Mikityanskiy *wi = (struct mlx5e_xdp_wqe_info) { 245ec9cdca0SMaxim Mikityanskiy .num_wqebbs = 1, 246ec9cdca0SMaxim Mikityanskiy .num_pkts = 0, 247ec9cdca0SMaxim Mikityanskiy }; 248ec9cdca0SMaxim Mikityanskiy mlx5e_post_nop(wq, sq->sqn, &sq->pc); 249ec9cdca0SMaxim Mikityanskiy } 250ec9cdca0SMaxim Mikityanskiy sq->stats->nops += contig_wqebbs; 251ec9cdca0SMaxim Mikityanskiy 252fed0c6cfSMaxim Mikityanskiy pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); 253fed0c6cfSMaxim Mikityanskiy } 2545e0d2eefSTariq Toukan 255ec9cdca0SMaxim Mikityanskiy return pi; 256ec9cdca0SMaxim Mikityanskiy } 257ec9cdca0SMaxim Mikityanskiy 258ec9cdca0SMaxim Mikityanskiy static void mlx5e_xdp_mpwqe_session_start(struct mlx5e_xdpsq *sq) 259ec9cdca0SMaxim Mikityanskiy { 260b39fe61eSMaxim Mikityanskiy struct mlx5e_tx_mpwqe *session = &sq->mpwqe; 261ec9cdca0SMaxim Mikityanskiy struct mlx5e_xdpsq_stats *stats = sq->stats; 26297e3afd6SMaxim Mikityanskiy struct mlx5e_tx_wqe *wqe; 263ec9cdca0SMaxim Mikityanskiy u16 pi; 264ec9cdca0SMaxim Mikityanskiy 26576c31e5fSAya Levin pi = mlx5e_xdpsq_get_next_pi(sq, sq->max_sq_mpw_wqebbs); 26697e3afd6SMaxim Mikityanskiy wqe = MLX5E_TX_FETCH_WQE(sq, pi); 26797e3afd6SMaxim Mikityanskiy net_prefetchw(wqe->data); 2685e0d2eefSTariq Toukan 269b39fe61eSMaxim Mikityanskiy *session = (struct mlx5e_tx_mpwqe) { 27097e3afd6SMaxim Mikityanskiy .wqe = wqe, 2715af75c74SMaxim Mikityanskiy .bytes_count = 0, 27297e3afd6SMaxim Mikityanskiy .ds_count = MLX5E_TX_WQE_EMPTY_DS_COUNT, 27397e3afd6SMaxim Mikityanskiy .pkt_count = 0, 27497e3afd6SMaxim Mikityanskiy .inline_on = mlx5e_xdp_get_inline_state(sq, session->inline_on), 27597e3afd6SMaxim Mikityanskiy }; 276c2273219SShay Agroskin 27773cab880SShay Agroskin stats->mpwqe++; 2785e0d2eefSTariq Toukan } 2795e0d2eefSTariq Toukan 280db05815bSMaxim Mikityanskiy void mlx5e_xdp_mpwqe_complete(struct mlx5e_xdpsq *sq) 2815e0d2eefSTariq Toukan { 2825e0d2eefSTariq Toukan struct mlx5_wq_cyc *wq = &sq->wq; 283b39fe61eSMaxim Mikityanskiy struct mlx5e_tx_mpwqe *session = &sq->mpwqe; 2845e0d2eefSTariq Toukan struct mlx5_wqe_ctrl_seg *cseg = &session->wqe->ctrl; 2855e0d2eefSTariq Toukan u16 ds_count = session->ds_count; 2865e0d2eefSTariq Toukan u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); 2875e0d2eefSTariq Toukan struct mlx5e_xdp_wqe_info *wi = &sq->db.wqe_info[pi]; 2885e0d2eefSTariq Toukan 2895e0d2eefSTariq Toukan cseg->opmod_idx_opcode = 2905e0d2eefSTariq Toukan cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_ENHANCED_MPSW); 2915e0d2eefSTariq Toukan cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_count); 2925e0d2eefSTariq Toukan 2935e0d2eefSTariq Toukan wi->num_wqebbs = DIV_ROUND_UP(ds_count, MLX5_SEND_WQEBB_NUM_DS); 294c2273219SShay Agroskin wi->num_pkts = session->pkt_count; 2955e0d2eefSTariq Toukan 2965e0d2eefSTariq Toukan sq->pc += wi->num_wqebbs; 2975e0d2eefSTariq Toukan 2985e0d2eefSTariq Toukan sq->doorbell_cseg = cseg; 2995e0d2eefSTariq Toukan 3005e0d2eefSTariq Toukan session->wqe = NULL; /* Close session */ 3015e0d2eefSTariq Toukan } 3025e0d2eefSTariq Toukan 303db05815bSMaxim Mikityanskiy enum { 304db05815bSMaxim Mikityanskiy MLX5E_XDP_CHECK_OK = 1, 305db05815bSMaxim Mikityanskiy MLX5E_XDP_CHECK_START_MPWQE = 2, 306db05815bSMaxim Mikityanskiy }; 307db05815bSMaxim Mikityanskiy 30893761ca1STariq Toukan INDIRECT_CALLABLE_SCOPE int mlx5e_xmit_xdp_frame_check_mpwqe(struct mlx5e_xdpsq *sq) 309db05815bSMaxim Mikityanskiy { 310db05815bSMaxim Mikityanskiy if (unlikely(!sq->mpwqe.wqe)) { 311db05815bSMaxim Mikityanskiy if (unlikely(!mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, 312c27bd171SAya Levin sq->stop_room))) { 313db05815bSMaxim Mikityanskiy /* SQ is full, ring doorbell */ 314db05815bSMaxim Mikityanskiy mlx5e_xmit_xdp_doorbell(sq); 315db05815bSMaxim Mikityanskiy sq->stats->full++; 316db05815bSMaxim Mikityanskiy return -EBUSY; 317db05815bSMaxim Mikityanskiy } 318db05815bSMaxim Mikityanskiy 319db05815bSMaxim Mikityanskiy return MLX5E_XDP_CHECK_START_MPWQE; 320db05815bSMaxim Mikityanskiy } 321db05815bSMaxim Mikityanskiy 322db05815bSMaxim Mikityanskiy return MLX5E_XDP_CHECK_OK; 323db05815bSMaxim Mikityanskiy } 324db05815bSMaxim Mikityanskiy 32593761ca1STariq Toukan INDIRECT_CALLABLE_SCOPE bool 32639a1665dSMaxim Mikityanskiy mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd, 32739a1665dSMaxim Mikityanskiy struct skb_shared_info *sinfo, int check_result); 32839a1665dSMaxim Mikityanskiy 32939a1665dSMaxim Mikityanskiy INDIRECT_CALLABLE_SCOPE bool 330b39fe61eSMaxim Mikityanskiy mlx5e_xmit_xdp_frame_mpwqe(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd, 33139a1665dSMaxim Mikityanskiy struct skb_shared_info *sinfo, int check_result) 3325e0d2eefSTariq Toukan { 333b39fe61eSMaxim Mikityanskiy struct mlx5e_tx_mpwqe *session = &sq->mpwqe; 3345e0d2eefSTariq Toukan struct mlx5e_xdpsq_stats *stats = sq->stats; 3355e0d2eefSTariq Toukan 33639a1665dSMaxim Mikityanskiy if (unlikely(sinfo)) { 33739a1665dSMaxim Mikityanskiy /* MPWQE is enabled, but a multi-buffer packet is queued for 33839a1665dSMaxim Mikityanskiy * transmission. MPWQE can't send fragmented packets, so close 33939a1665dSMaxim Mikityanskiy * the current session and fall back to a regular WQE. 34039a1665dSMaxim Mikityanskiy */ 34139a1665dSMaxim Mikityanskiy if (unlikely(sq->mpwqe.wqe)) 34239a1665dSMaxim Mikityanskiy mlx5e_xdp_mpwqe_complete(sq); 34339a1665dSMaxim Mikityanskiy return mlx5e_xmit_xdp_frame(sq, xdptxd, sinfo, 0); 34439a1665dSMaxim Mikityanskiy } 34539a1665dSMaxim Mikityanskiy 346d963fa15SMaxim Mikityanskiy if (unlikely(xdptxd->len > sq->hw_mtu)) { 3475e0d2eefSTariq Toukan stats->err++; 3485e0d2eefSTariq Toukan return false; 3495e0d2eefSTariq Toukan } 3505e0d2eefSTariq Toukan 351db05815bSMaxim Mikityanskiy if (!check_result) 352db05815bSMaxim Mikityanskiy check_result = mlx5e_xmit_xdp_frame_check_mpwqe(sq); 353db05815bSMaxim Mikityanskiy if (unlikely(check_result < 0)) 3545e0d2eefSTariq Toukan return false; 3555e0d2eefSTariq Toukan 356db05815bSMaxim Mikityanskiy if (check_result == MLX5E_XDP_CHECK_START_MPWQE) { 357db05815bSMaxim Mikityanskiy /* Start the session when nothing can fail, so it's guaranteed 358db05815bSMaxim Mikityanskiy * that if there is an active session, it has at least one dseg, 359db05815bSMaxim Mikityanskiy * and it's safe to complete it at any time. 360db05815bSMaxim Mikityanskiy */ 3615e0d2eefSTariq Toukan mlx5e_xdp_mpwqe_session_start(sq); 3625e0d2eefSTariq Toukan } 3635e0d2eefSTariq Toukan 364d963fa15SMaxim Mikityanskiy mlx5e_xdp_mpwqe_add_dseg(sq, xdptxd, stats); 3655e0d2eefSTariq Toukan 366e3c4c496SMaxim Mikityanskiy if (unlikely(mlx5e_xdp_mpwqe_is_full(session, sq->max_sq_mpw_wqebbs))) 3675e0d2eefSTariq Toukan mlx5e_xdp_mpwqe_complete(sq); 3685e0d2eefSTariq Toukan 3695e0d2eefSTariq Toukan stats->xmit++; 3705e0d2eefSTariq Toukan return true; 3715e0d2eefSTariq Toukan } 3725e0d2eefSTariq Toukan 37339a1665dSMaxim Mikityanskiy static int mlx5e_xmit_xdp_frame_check_stop_room(struct mlx5e_xdpsq *sq, int stop_room) 374db05815bSMaxim Mikityanskiy { 37539a1665dSMaxim Mikityanskiy if (unlikely(!mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, stop_room))) { 376db05815bSMaxim Mikityanskiy /* SQ is full, ring doorbell */ 377db05815bSMaxim Mikityanskiy mlx5e_xmit_xdp_doorbell(sq); 378db05815bSMaxim Mikityanskiy sq->stats->full++; 379db05815bSMaxim Mikityanskiy return -EBUSY; 380db05815bSMaxim Mikityanskiy } 381db05815bSMaxim Mikityanskiy 382db05815bSMaxim Mikityanskiy return MLX5E_XDP_CHECK_OK; 383db05815bSMaxim Mikityanskiy } 384db05815bSMaxim Mikityanskiy 38539a1665dSMaxim Mikityanskiy INDIRECT_CALLABLE_SCOPE int mlx5e_xmit_xdp_frame_check(struct mlx5e_xdpsq *sq) 38639a1665dSMaxim Mikityanskiy { 38739a1665dSMaxim Mikityanskiy return mlx5e_xmit_xdp_frame_check_stop_room(sq, 1); 38839a1665dSMaxim Mikityanskiy } 38939a1665dSMaxim Mikityanskiy 39093761ca1STariq Toukan INDIRECT_CALLABLE_SCOPE bool 391b39fe61eSMaxim Mikityanskiy mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xmit_data *xdptxd, 39239a1665dSMaxim Mikityanskiy struct skb_shared_info *sinfo, int check_result) 393159d2131STariq Toukan { 394159d2131STariq Toukan struct mlx5_wq_cyc *wq = &sq->wq; 39539a1665dSMaxim Mikityanskiy struct mlx5_wqe_ctrl_seg *cseg; 39639a1665dSMaxim Mikityanskiy struct mlx5_wqe_data_seg *dseg; 39739a1665dSMaxim Mikityanskiy struct mlx5_wqe_eth_seg *eseg; 39839a1665dSMaxim Mikityanskiy struct mlx5e_tx_wqe *wqe; 399159d2131STariq Toukan 400d963fa15SMaxim Mikityanskiy dma_addr_t dma_addr = xdptxd->dma_addr; 401d963fa15SMaxim Mikityanskiy u32 dma_len = xdptxd->len; 4029ded70faSMaxim Mikityanskiy u16 ds_cnt, inline_hdr_sz; 40339a1665dSMaxim Mikityanskiy u8 num_wqebbs = 1; 40439a1665dSMaxim Mikityanskiy int num_frags = 0; 40539a1665dSMaxim Mikityanskiy u16 pi; 406159d2131STariq Toukan 407890388adSTariq Toukan struct mlx5e_xdpsq_stats *stats = sq->stats; 408159d2131STariq Toukan 409c94e4f11STariq Toukan if (unlikely(dma_len < MLX5E_XDP_MIN_INLINE || sq->hw_mtu < dma_len)) { 410890388adSTariq Toukan stats->err++; 411159d2131STariq Toukan return false; 412159d2131STariq Toukan } 413159d2131STariq Toukan 41439a1665dSMaxim Mikityanskiy ds_cnt = MLX5E_TX_WQE_EMPTY_DS_COUNT + 1; 41539a1665dSMaxim Mikityanskiy if (sq->min_inline_mode != MLX5_INLINE_MODE_NONE) 41639a1665dSMaxim Mikityanskiy ds_cnt++; 41739a1665dSMaxim Mikityanskiy 41839a1665dSMaxim Mikityanskiy /* check_result must be 0 if sinfo is passed. */ 41939a1665dSMaxim Mikityanskiy if (!check_result) { 42039a1665dSMaxim Mikityanskiy int stop_room = 1; 42139a1665dSMaxim Mikityanskiy 42239a1665dSMaxim Mikityanskiy if (unlikely(sinfo)) { 42339a1665dSMaxim Mikityanskiy ds_cnt += sinfo->nr_frags; 42439a1665dSMaxim Mikityanskiy num_frags = sinfo->nr_frags; 42539a1665dSMaxim Mikityanskiy num_wqebbs = DIV_ROUND_UP(ds_cnt, MLX5_SEND_WQEBB_NUM_DS); 42639a1665dSMaxim Mikityanskiy /* Assuming MLX5_CAP_GEN(mdev, max_wqe_sz_sq) is big 42739a1665dSMaxim Mikityanskiy * enough to hold all fragments. 42839a1665dSMaxim Mikityanskiy */ 42939a1665dSMaxim Mikityanskiy stop_room = MLX5E_STOP_ROOM(num_wqebbs); 43039a1665dSMaxim Mikityanskiy } 43139a1665dSMaxim Mikityanskiy 43239a1665dSMaxim Mikityanskiy check_result = mlx5e_xmit_xdp_frame_check_stop_room(sq, stop_room); 43339a1665dSMaxim Mikityanskiy } 434db05815bSMaxim Mikityanskiy if (unlikely(check_result < 0)) 435159d2131STariq Toukan return false; 436159d2131STariq Toukan 43739a1665dSMaxim Mikityanskiy pi = mlx5e_xdpsq_get_next_pi(sq, num_wqebbs); 43839a1665dSMaxim Mikityanskiy wqe = mlx5_wq_cyc_get_wqe(wq, pi); 43939a1665dSMaxim Mikityanskiy net_prefetchw(wqe); 44039a1665dSMaxim Mikityanskiy 44139a1665dSMaxim Mikityanskiy cseg = &wqe->ctrl; 44239a1665dSMaxim Mikityanskiy eseg = &wqe->eth; 44339a1665dSMaxim Mikityanskiy dseg = wqe->data; 44439a1665dSMaxim Mikityanskiy 4459ded70faSMaxim Mikityanskiy inline_hdr_sz = 0; 446159d2131STariq Toukan 447159d2131STariq Toukan /* copy the inline part if required */ 448159d2131STariq Toukan if (sq->min_inline_mode != MLX5_INLINE_MODE_NONE) { 449ad518573SKees Cook memcpy(eseg->inline_hdr.start, xdptxd->data, sizeof(eseg->inline_hdr.start)); 450ad518573SKees Cook memcpy(dseg, xdptxd->data + sizeof(eseg->inline_hdr.start), 451ad518573SKees Cook MLX5E_XDP_MIN_INLINE - sizeof(eseg->inline_hdr.start)); 452159d2131STariq Toukan dma_len -= MLX5E_XDP_MIN_INLINE; 453159d2131STariq Toukan dma_addr += MLX5E_XDP_MIN_INLINE; 4549ded70faSMaxim Mikityanskiy inline_hdr_sz = MLX5E_XDP_MIN_INLINE; 455159d2131STariq Toukan dseg++; 456159d2131STariq Toukan } 457159d2131STariq Toukan 458159d2131STariq Toukan /* write the dma part */ 459159d2131STariq Toukan dseg->addr = cpu_to_be64(dma_addr); 460159d2131STariq Toukan dseg->byte_count = cpu_to_be32(dma_len); 461159d2131STariq Toukan 462159d2131STariq Toukan cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_SEND); 463159d2131STariq Toukan 4649ded70faSMaxim Mikityanskiy if (unlikely(test_bit(MLX5E_SQ_STATE_XDP_MULTIBUF, &sq->state))) { 46539a1665dSMaxim Mikityanskiy u8 num_pkts = 1 + num_frags; 46639a1665dSMaxim Mikityanskiy int i; 4679ded70faSMaxim Mikityanskiy 4682af7e566SSaeed Mahameed memset(&cseg->trailer, 0, sizeof(cseg->trailer)); 4699ded70faSMaxim Mikityanskiy memset(eseg, 0, sizeof(*eseg) - sizeof(eseg->trailer)); 4709ded70faSMaxim Mikityanskiy 4719ded70faSMaxim Mikityanskiy eseg->inline_hdr.sz = cpu_to_be16(inline_hdr_sz); 4729ded70faSMaxim Mikityanskiy dseg->lkey = sq->mkey_be; 4739ded70faSMaxim Mikityanskiy 47439a1665dSMaxim Mikityanskiy for (i = 0; i < num_frags; i++) { 47539a1665dSMaxim Mikityanskiy skb_frag_t *frag = &sinfo->frags[i]; 47639a1665dSMaxim Mikityanskiy dma_addr_t addr; 47739a1665dSMaxim Mikityanskiy 47839a1665dSMaxim Mikityanskiy addr = page_pool_get_dma_addr(skb_frag_page(frag)) + 47939a1665dSMaxim Mikityanskiy skb_frag_off(frag); 48039a1665dSMaxim Mikityanskiy 48139a1665dSMaxim Mikityanskiy dseg++; 48239a1665dSMaxim Mikityanskiy dseg->addr = cpu_to_be64(addr); 48339a1665dSMaxim Mikityanskiy dseg->byte_count = cpu_to_be32(skb_frag_size(frag)); 48439a1665dSMaxim Mikityanskiy dseg->lkey = sq->mkey_be; 48539a1665dSMaxim Mikityanskiy } 48639a1665dSMaxim Mikityanskiy 4879ded70faSMaxim Mikityanskiy cseg->qpn_ds = cpu_to_be32((sq->sqn << 8) | ds_cnt); 4889ded70faSMaxim Mikityanskiy 4899ded70faSMaxim Mikityanskiy sq->db.wqe_info[pi] = (struct mlx5e_xdp_wqe_info) { 4909ded70faSMaxim Mikityanskiy .num_wqebbs = num_wqebbs, 4919ded70faSMaxim Mikityanskiy .num_pkts = num_pkts, 4929ded70faSMaxim Mikityanskiy }; 4939ded70faSMaxim Mikityanskiy 4949ded70faSMaxim Mikityanskiy sq->pc += num_wqebbs; 4959ded70faSMaxim Mikityanskiy } else { 4969ded70faSMaxim Mikityanskiy cseg->fm_ce_se = 0; 4979ded70faSMaxim Mikityanskiy 498159d2131STariq Toukan sq->pc++; 4999ded70faSMaxim Mikityanskiy } 500159d2131STariq Toukan 501b8180392STariq Toukan sq->doorbell_cseg = cseg; 502159d2131STariq Toukan 503890388adSTariq Toukan stats->xmit++; 504159d2131STariq Toukan return true; 505159d2131STariq Toukan } 506159d2131STariq Toukan 50733e10924SMaxim Mikityanskiy static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq, 50833e10924SMaxim Mikityanskiy struct mlx5e_xdp_wqe_info *wi, 509db05815bSMaxim Mikityanskiy u32 *xsk_frames, 510b87c57aeSLorenzo Bianconi bool recycle, 511b87c57aeSLorenzo Bianconi struct xdp_frame_bulk *bq) 51233e10924SMaxim Mikityanskiy { 51333e10924SMaxim Mikityanskiy struct mlx5e_xdp_info_fifo *xdpi_fifo = &sq->db.xdpi_fifo; 51433e10924SMaxim Mikityanskiy u16 i; 51533e10924SMaxim Mikityanskiy 51633e10924SMaxim Mikityanskiy for (i = 0; i < wi->num_pkts; i++) { 51733e10924SMaxim Mikityanskiy struct mlx5e_xdp_info xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo); 51833e10924SMaxim Mikityanskiy 519d963fa15SMaxim Mikityanskiy switch (xdpi.mode) { 520d963fa15SMaxim Mikityanskiy case MLX5E_XDP_XMIT_MODE_FRAME: 52184a0a231SMaxim Mikityanskiy /* XDP_TX from the XSK RQ and XDP_REDIRECT */ 522d963fa15SMaxim Mikityanskiy dma_unmap_single(sq->pdev, xdpi.frame.dma_addr, 523d963fa15SMaxim Mikityanskiy xdpi.frame.xdpf->len, DMA_TO_DEVICE); 524b87c57aeSLorenzo Bianconi xdp_return_frame_bulk(xdpi.frame.xdpf, bq); 525d963fa15SMaxim Mikityanskiy break; 526d963fa15SMaxim Mikityanskiy case MLX5E_XDP_XMIT_MODE_PAGE: 52784a0a231SMaxim Mikityanskiy /* XDP_TX from the regular RQ */ 528ddc87e7dSMaxim Mikityanskiy mlx5e_page_release_dynamic(xdpi.page.rq, xdpi.page.page, recycle); 529db05815bSMaxim Mikityanskiy break; 530db05815bSMaxim Mikityanskiy case MLX5E_XDP_XMIT_MODE_XSK: 531db05815bSMaxim Mikityanskiy /* AF_XDP send */ 532db05815bSMaxim Mikityanskiy (*xsk_frames)++; 533d963fa15SMaxim Mikityanskiy break; 534d963fa15SMaxim Mikityanskiy default: 535d963fa15SMaxim Mikityanskiy WARN_ON_ONCE(true); 53633e10924SMaxim Mikityanskiy } 53733e10924SMaxim Mikityanskiy } 53833e10924SMaxim Mikityanskiy } 53933e10924SMaxim Mikityanskiy 540b9673cf5SMaxim Mikityanskiy bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq) 541159d2131STariq Toukan { 542b87c57aeSLorenzo Bianconi struct xdp_frame_bulk bq; 543159d2131STariq Toukan struct mlx5e_xdpsq *sq; 544159d2131STariq Toukan struct mlx5_cqe64 *cqe; 545db05815bSMaxim Mikityanskiy u32 xsk_frames = 0; 546159d2131STariq Toukan u16 sqcc; 547159d2131STariq Toukan int i; 548159d2131STariq Toukan 549b87c57aeSLorenzo Bianconi xdp_frame_bulk_init(&bq); 550b87c57aeSLorenzo Bianconi 551159d2131STariq Toukan sq = container_of(cq, struct mlx5e_xdpsq, cq); 552159d2131STariq Toukan 553159d2131STariq Toukan if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state))) 554159d2131STariq Toukan return false; 555159d2131STariq Toukan 556159d2131STariq Toukan cqe = mlx5_cqwq_get_cqe(&cq->wq); 557159d2131STariq Toukan if (!cqe) 558159d2131STariq Toukan return false; 559159d2131STariq Toukan 560159d2131STariq Toukan /* sq->cc must be updated only after mlx5_cqwq_update_db_record(), 561159d2131STariq Toukan * otherwise a cq overrun may occur 562159d2131STariq Toukan */ 563159d2131STariq Toukan sqcc = sq->cc; 564159d2131STariq Toukan 565159d2131STariq Toukan i = 0; 566159d2131STariq Toukan do { 567e2e11dbfSTariq Toukan struct mlx5e_xdp_wqe_info *wi; 568e2e11dbfSTariq Toukan u16 wqe_counter, ci; 569159d2131STariq Toukan bool last_wqe; 570159d2131STariq Toukan 571159d2131STariq Toukan mlx5_cqwq_pop(&cq->wq); 572159d2131STariq Toukan 573159d2131STariq Toukan wqe_counter = be16_to_cpu(cqe->wqe_counter); 574159d2131STariq Toukan 575159d2131STariq Toukan do { 576159d2131STariq Toukan last_wqe = (sqcc == wqe_counter); 5771feeab80STariq Toukan ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc); 5781feeab80STariq Toukan wi = &sq->db.wqe_info[ci]; 5791feeab80STariq Toukan 5801feeab80STariq Toukan sqcc += wi->num_wqebbs; 5811feeab80STariq Toukan 582b87c57aeSLorenzo Bianconi mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, true, &bq); 583159d2131STariq Toukan } while (!last_wqe); 584f1b95753STariq Toukan 585f1b95753STariq Toukan if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) { 586f1b95753STariq Toukan netdev_WARN_ONCE(sq->channel->netdev, 587f1b95753STariq Toukan "Bad OP in XDPSQ CQE: 0x%x\n", 588f1b95753STariq Toukan get_cqe_opcode(cqe)); 589f1b95753STariq Toukan mlx5e_dump_error_cqe(&sq->cq, sq->sqn, 590f1b95753STariq Toukan (struct mlx5_err_cqe *)cqe); 591e2e11dbfSTariq Toukan mlx5_wq_cyc_wqe_dump(&sq->wq, ci, wi->num_wqebbs); 592f1b95753STariq Toukan } 593159d2131STariq Toukan } while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq))); 594159d2131STariq Toukan 595b87c57aeSLorenzo Bianconi xdp_flush_frame_bulk(&bq); 596b87c57aeSLorenzo Bianconi 597db05815bSMaxim Mikityanskiy if (xsk_frames) 598c4655761SMagnus Karlsson xsk_tx_completed(sq->xsk_pool, xsk_frames); 599db05815bSMaxim Mikityanskiy 600890388adSTariq Toukan sq->stats->cqes += i; 601159d2131STariq Toukan 602159d2131STariq Toukan mlx5_cqwq_update_db_record(&cq->wq); 603159d2131STariq Toukan 604159d2131STariq Toukan /* ensure cq space is freed before enabling more cqes */ 605159d2131STariq Toukan wmb(); 606159d2131STariq Toukan 607159d2131STariq Toukan sq->cc = sqcc; 608159d2131STariq Toukan return (i == MLX5E_TX_CQ_POLL_BUDGET); 609159d2131STariq Toukan } 610159d2131STariq Toukan 611b9673cf5SMaxim Mikityanskiy void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq) 612159d2131STariq Toukan { 613b87c57aeSLorenzo Bianconi struct xdp_frame_bulk bq; 614db05815bSMaxim Mikityanskiy u32 xsk_frames = 0; 615db05815bSMaxim Mikityanskiy 616b87c57aeSLorenzo Bianconi xdp_frame_bulk_init(&bq); 617b87c57aeSLorenzo Bianconi 618b87c57aeSLorenzo Bianconi rcu_read_lock(); /* need for xdp_return_frame_bulk */ 619b87c57aeSLorenzo Bianconi 620159d2131STariq Toukan while (sq->cc != sq->pc) { 6211feeab80STariq Toukan struct mlx5e_xdp_wqe_info *wi; 62233e10924SMaxim Mikityanskiy u16 ci; 6231feeab80STariq Toukan 6241feeab80STariq Toukan ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sq->cc); 6251feeab80STariq Toukan wi = &sq->db.wqe_info[ci]; 6261feeab80STariq Toukan 6271feeab80STariq Toukan sq->cc += wi->num_wqebbs; 6281feeab80STariq Toukan 629b87c57aeSLorenzo Bianconi mlx5e_free_xdpsq_desc(sq, wi, &xsk_frames, false, &bq); 63058b99ee3STariq Toukan } 631db05815bSMaxim Mikityanskiy 632b87c57aeSLorenzo Bianconi xdp_flush_frame_bulk(&bq); 633b87c57aeSLorenzo Bianconi rcu_read_unlock(); 634b87c57aeSLorenzo Bianconi 635db05815bSMaxim Mikityanskiy if (xsk_frames) 636c4655761SMagnus Karlsson xsk_tx_completed(sq->xsk_pool, xsk_frames); 6371feeab80STariq Toukan } 638159d2131STariq Toukan 63958b99ee3STariq Toukan int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, 64058b99ee3STariq Toukan u32 flags) 64158b99ee3STariq Toukan { 64258b99ee3STariq Toukan struct mlx5e_priv *priv = netdev_priv(dev); 64358b99ee3STariq Toukan struct mlx5e_xdpsq *sq; 644fdc13979SLorenzo Bianconi int nxmit = 0; 64558b99ee3STariq Toukan int sq_num; 64658b99ee3STariq Toukan int i; 64758b99ee3STariq Toukan 648407e17b1SSaeed Mahameed /* this flag is sufficient, no need to test internal sq state */ 649407e17b1SSaeed Mahameed if (unlikely(!mlx5e_xdp_tx_is_enabled(priv))) 65058b99ee3STariq Toukan return -ENETDOWN; 65158b99ee3STariq Toukan 65258b99ee3STariq Toukan if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 65358b99ee3STariq Toukan return -EINVAL; 65458b99ee3STariq Toukan 65558b99ee3STariq Toukan sq_num = smp_processor_id(); 65658b99ee3STariq Toukan 65758b99ee3STariq Toukan if (unlikely(sq_num >= priv->channels.num)) 65858b99ee3STariq Toukan return -ENXIO; 65958b99ee3STariq Toukan 66058b99ee3STariq Toukan sq = &priv->channels.c[sq_num]->xdpsq; 66158b99ee3STariq Toukan 66258b99ee3STariq Toukan for (i = 0; i < n; i++) { 66358b99ee3STariq Toukan struct xdp_frame *xdpf = frames[i]; 664b39fe61eSMaxim Mikityanskiy struct mlx5e_xmit_data xdptxd; 66558b99ee3STariq Toukan struct mlx5e_xdp_info xdpi; 66693761ca1STariq Toukan bool ret; 66758b99ee3STariq Toukan 668d963fa15SMaxim Mikityanskiy xdptxd.data = xdpf->data; 669d963fa15SMaxim Mikityanskiy xdptxd.len = xdpf->len; 670d963fa15SMaxim Mikityanskiy xdptxd.dma_addr = dma_map_single(sq->pdev, xdptxd.data, 671d963fa15SMaxim Mikityanskiy xdptxd.len, DMA_TO_DEVICE); 672d963fa15SMaxim Mikityanskiy 673fdc13979SLorenzo Bianconi if (unlikely(dma_mapping_error(sq->pdev, xdptxd.dma_addr))) 674fdc13979SLorenzo Bianconi break; 67558b99ee3STariq Toukan 676d963fa15SMaxim Mikityanskiy xdpi.mode = MLX5E_XDP_XMIT_MODE_FRAME; 677d963fa15SMaxim Mikityanskiy xdpi.frame.xdpf = xdpf; 678d963fa15SMaxim Mikityanskiy xdpi.frame.dma_addr = xdptxd.dma_addr; 67958b99ee3STariq Toukan 68093761ca1STariq Toukan ret = INDIRECT_CALL_2(sq->xmit_xdp_frame, mlx5e_xmit_xdp_frame_mpwqe, 68139a1665dSMaxim Mikityanskiy mlx5e_xmit_xdp_frame, sq, &xdptxd, NULL, 0); 68293761ca1STariq Toukan if (unlikely(!ret)) { 683d963fa15SMaxim Mikityanskiy dma_unmap_single(sq->pdev, xdptxd.dma_addr, 684d963fa15SMaxim Mikityanskiy xdptxd.len, DMA_TO_DEVICE); 685fdc13979SLorenzo Bianconi break; 68658b99ee3STariq Toukan } 68749529a17SMaxim Mikityanskiy mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, &xdpi); 688fdc13979SLorenzo Bianconi nxmit++; 68958b99ee3STariq Toukan } 69058b99ee3STariq Toukan 6915e0d2eefSTariq Toukan if (flags & XDP_XMIT_FLUSH) { 6925e0d2eefSTariq Toukan if (sq->mpwqe.wqe) 6935e0d2eefSTariq Toukan mlx5e_xdp_mpwqe_complete(sq); 69458b99ee3STariq Toukan mlx5e_xmit_xdp_doorbell(sq); 6955e0d2eefSTariq Toukan } 69658b99ee3STariq Toukan 697fdc13979SLorenzo Bianconi return nxmit; 69858b99ee3STariq Toukan } 6994fb2f516STariq Toukan 7004fb2f516STariq Toukan void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq) 7014fb2f516STariq Toukan { 702b9673cf5SMaxim Mikityanskiy struct mlx5e_xdpsq *xdpsq = rq->xdpsq; 7034fb2f516STariq Toukan 7045e0d2eefSTariq Toukan if (xdpsq->mpwqe.wqe) 7055e0d2eefSTariq Toukan mlx5e_xdp_mpwqe_complete(xdpsq); 7065e0d2eefSTariq Toukan 7074fb2f516STariq Toukan mlx5e_xmit_xdp_doorbell(xdpsq); 7084fb2f516STariq Toukan 70915143bf5STariq Toukan if (test_bit(MLX5E_RQ_FLAG_XDP_REDIRECT, rq->flags)) { 7104fb2f516STariq Toukan xdp_do_flush_map(); 71115143bf5STariq Toukan __clear_bit(MLX5E_RQ_FLAG_XDP_REDIRECT, rq->flags); 7124fb2f516STariq Toukan } 7134fb2f516STariq Toukan } 7145e0d2eefSTariq Toukan 7155e0d2eefSTariq Toukan void mlx5e_set_xmit_fp(struct mlx5e_xdpsq *sq, bool is_mpw) 7165e0d2eefSTariq Toukan { 717db05815bSMaxim Mikityanskiy sq->xmit_xdp_frame_check = is_mpw ? 718db05815bSMaxim Mikityanskiy mlx5e_xmit_xdp_frame_check_mpwqe : mlx5e_xmit_xdp_frame_check; 7195e0d2eefSTariq Toukan sq->xmit_xdp_frame = is_mpw ? 7205e0d2eefSTariq Toukan mlx5e_xmit_xdp_frame_mpwqe : mlx5e_xmit_xdp_frame; 7215e0d2eefSTariq Toukan } 722