Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Maciej Fijalkowski | 2236 | 46.72% | 38 | 40.43% |
Krzysztof Kazimierczak | 1628 | 34.02% | 3 | 3.19% |
Anirudh Venkataramanan | 311 | 6.50% | 16 | 17.02% |
Przemyslaw Patynowski | 142 | 2.97% | 1 | 1.06% |
Magnus Karlsson | 90 | 1.88% | 7 | 7.45% |
Björn Töpel | 69 | 1.44% | 2 | 2.13% |
Alexander Lobakin | 62 | 1.30% | 2 | 2.13% |
Benjamin Mikailenko | 55 | 1.15% | 1 | 1.06% |
Larysa Zaremba | 38 | 0.79% | 5 | 5.32% |
Michal Swiatkowski | 35 | 0.73% | 1 | 1.06% |
Michal Kubiak | 31 | 0.65% | 1 | 1.06% |
David S. Miller | 17 | 0.36% | 1 | 1.06% |
Sudheer Mogilappagari | 16 | 0.33% | 1 | 1.06% |
Dave Ertman | 10 | 0.21% | 1 | 1.06% |
Akeem G. Abodunrin | 8 | 0.17% | 1 | 1.06% |
Bruce W Allan | 8 | 0.17% | 3 | 3.19% |
Brett Creeley | 7 | 0.15% | 2 | 2.13% |
Paolo Abeni | 5 | 0.10% | 1 | 1.06% |
Piotr Raczynski | 4 | 0.08% | 1 | 1.06% |
Md Fahad Iqbal Polash | 4 | 0.08% | 1 | 1.06% |
Przemek Kitszel | 4 | 0.08% | 1 | 1.06% |
Colin Ian King | 2 | 0.04% | 1 | 1.06% |
Jesse Brandeburg | 2 | 0.04% | 1 | 1.06% |
Jakub Kiciński | 1 | 0.02% | 1 | 1.06% |
Tony Nguyen | 1 | 0.02% | 1 | 1.06% |
Total | 4786 | 94 |
// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019, Intel Corporation. */ #include <linux/bpf_trace.h> #include <net/xdp_sock_drv.h> #include <net/xdp.h> #include "ice.h" #include "ice_base.h" #include "ice_type.h" #include "ice_xsk.h" #include "ice_txrx.h" #include "ice_txrx_lib.h" #include "ice_lib.h" static struct xdp_buff **ice_xdp_buf(struct ice_rx_ring *rx_ring, u32 idx) { return &rx_ring->xdp_buf[idx]; } /** * ice_qp_reset_stats - Resets all stats for rings of given index * @vsi: VSI that contains rings of interest * @q_idx: ring index in array */ static void ice_qp_reset_stats(struct ice_vsi *vsi, u16 q_idx) { struct ice_vsi_stats *vsi_stat; struct ice_pf *pf; pf = vsi->back; if (!pf->vsi_stats) return; vsi_stat = pf->vsi_stats[vsi->idx]; if (!vsi_stat) return; memset(&vsi_stat->rx_ring_stats[q_idx]->rx_stats, 0, sizeof(vsi_stat->rx_ring_stats[q_idx]->rx_stats)); memset(&vsi_stat->tx_ring_stats[q_idx]->stats, 0, sizeof(vsi_stat->tx_ring_stats[q_idx]->stats)); if (vsi->xdp_rings) memset(&vsi->xdp_rings[q_idx]->ring_stats->stats, 0, sizeof(vsi->xdp_rings[q_idx]->ring_stats->stats)); } /** * ice_qp_clean_rings - Cleans all the rings of a given index * @vsi: VSI that contains rings of interest * @q_idx: ring index in array */ static void ice_qp_clean_rings(struct ice_vsi *vsi, u16 q_idx) { ice_clean_tx_ring(vsi->tx_rings[q_idx]); if (vsi->xdp_rings) ice_clean_tx_ring(vsi->xdp_rings[q_idx]); ice_clean_rx_ring(vsi->rx_rings[q_idx]); } /** * ice_qvec_toggle_napi - Enables/disables NAPI for a given q_vector * @vsi: VSI that has netdev * @q_vector: q_vector that has NAPI context * @enable: true for enable, false for disable */ static void ice_qvec_toggle_napi(struct ice_vsi *vsi, struct ice_q_vector *q_vector, bool enable) { if (!vsi->netdev || !q_vector) return; if (enable) napi_enable(&q_vector->napi); else napi_disable(&q_vector->napi); } /** * ice_qvec_dis_irq - Mask off queue interrupt generation on given ring * @vsi: the VSI that contains queue vector being un-configured * @rx_ring: Rx ring that will have its IRQ disabled * @q_vector: queue vector */ static void ice_qvec_dis_irq(struct ice_vsi *vsi, struct ice_rx_ring *rx_ring, struct ice_q_vector *q_vector) { struct ice_pf *pf = vsi->back; struct ice_hw *hw = &pf->hw; u16 reg; u32 val; /* QINT_TQCTL is being cleared in ice_vsi_stop_tx_ring, so handle * here only QINT_RQCTL */ reg = rx_ring->reg_idx; val = rd32(hw, QINT_RQCTL(reg)); val &= ~QINT_RQCTL_CAUSE_ENA_M; wr32(hw, QINT_RQCTL(reg), val); if (q_vector) { wr32(hw, GLINT_DYN_CTL(q_vector->reg_idx), 0); ice_flush(hw); synchronize_irq(q_vector->irq.virq); } } /** * ice_qvec_cfg_msix - Enable IRQ for given queue vector * @vsi: the VSI that contains queue vector * @q_vector: queue vector * @qid: queue index */ static void ice_qvec_cfg_msix(struct ice_vsi *vsi, struct ice_q_vector *q_vector, u16 qid) { u16 reg_idx = q_vector->reg_idx; struct ice_pf *pf = vsi->back; struct ice_hw *hw = &pf->hw; int q, _qid = qid; ice_cfg_itr(hw, q_vector); for (q = 0; q < q_vector->num_ring_tx; q++) { ice_cfg_txq_interrupt(vsi, _qid, reg_idx, q_vector->tx.itr_idx); _qid++; } _qid = qid; for (q = 0; q < q_vector->num_ring_rx; q++) { ice_cfg_rxq_interrupt(vsi, _qid, reg_idx, q_vector->rx.itr_idx); _qid++; } ice_flush(hw); } /** * ice_qvec_ena_irq - Enable IRQ for given queue vector * @vsi: the VSI that contains queue vector * @q_vector: queue vector */ static void ice_qvec_ena_irq(struct ice_vsi *vsi, struct ice_q_vector *q_vector) { struct ice_pf *pf = vsi->back; struct ice_hw *hw = &pf->hw; ice_irq_dynamic_ena(hw, vsi, q_vector); ice_flush(hw); } /** * ice_qp_dis - Disables a queue pair * @vsi: VSI of interest * @q_idx: ring index in array * * Returns 0 on success, negative on failure. */ static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx) { struct ice_txq_meta txq_meta = { }; struct ice_q_vector *q_vector; struct ice_tx_ring *tx_ring; struct ice_rx_ring *rx_ring; int fail = 0; int err; if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq) return -EINVAL; tx_ring = vsi->tx_rings[q_idx]; rx_ring = vsi->rx_rings[q_idx]; q_vector = rx_ring->q_vector; synchronize_net(); netif_carrier_off(vsi->netdev); netif_tx_stop_queue(netdev_get_tx_queue(vsi->netdev, q_idx)); ice_qvec_dis_irq(vsi, rx_ring, q_vector); ice_qvec_toggle_napi(vsi, q_vector, false); ice_fill_txq_meta(vsi, tx_ring, &txq_meta); err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, tx_ring, &txq_meta); if (!fail) fail = err; if (vsi->xdp_rings) { struct ice_tx_ring *xdp_ring = vsi->xdp_rings[q_idx]; memset(&txq_meta, 0, sizeof(txq_meta)); ice_fill_txq_meta(vsi, xdp_ring, &txq_meta); err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, xdp_ring, &txq_meta); if (!fail) fail = err; } ice_vsi_ctrl_one_rx_ring(vsi, false, q_idx, false); ice_qp_clean_rings(vsi, q_idx); ice_qp_reset_stats(vsi, q_idx); return fail; } /** * ice_qp_ena - Enables a queue pair * @vsi: VSI of interest * @q_idx: ring index in array * * Returns 0 on success, negative on failure. */ static int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx) { struct ice_q_vector *q_vector; int fail = 0; bool link_up; int err; err = ice_vsi_cfg_single_txq(vsi, vsi->tx_rings, q_idx); if (!fail) fail = err; if (ice_is_xdp_ena_vsi(vsi)) { struct ice_tx_ring *xdp_ring = vsi->xdp_rings[q_idx]; err = ice_vsi_cfg_single_txq(vsi, vsi->xdp_rings, q_idx); if (!fail) fail = err; ice_set_ring_xdp(xdp_ring); ice_tx_xsk_pool(vsi, q_idx); } err = ice_vsi_cfg_single_rxq(vsi, q_idx); if (!fail) fail = err; q_vector = vsi->rx_rings[q_idx]->q_vector; ice_qvec_cfg_msix(vsi, q_vector, q_idx); err = ice_vsi_ctrl_one_rx_ring(vsi, true, q_idx, true); if (!fail) fail = err; ice_qvec_toggle_napi(vsi, q_vector, true); ice_qvec_ena_irq(vsi, q_vector); /* make sure NAPI sees updated ice_{t,x}_ring::xsk_pool */ synchronize_net(); ice_get_link_status(vsi->port_info, &link_up); if (link_up) { netif_tx_start_queue(netdev_get_tx_queue(vsi->netdev, q_idx)); netif_carrier_on(vsi->netdev); } return fail; } /** * ice_xsk_pool_disable - disable a buffer pool region * @vsi: Current VSI * @qid: queue ID * * Returns 0 on success, negative on failure */ static int ice_xsk_pool_disable(struct ice_vsi *vsi, u16 qid) { struct xsk_buff_pool *pool = xsk_get_pool_from_qid(vsi->netdev, qid); if (!pool) return -EINVAL; xsk_pool_dma_unmap(pool, ICE_RX_DMA_ATTR); return 0; } /** * ice_xsk_pool_enable - enable a buffer pool region * @vsi: Current VSI * @pool: pointer to a requested buffer pool region * @qid: queue ID * * Returns 0 on success, negative on failure */ static int ice_xsk_pool_enable(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid) { int err; if (vsi->type != ICE_VSI_PF) return -EINVAL; if (qid >= vsi->netdev->real_num_rx_queues || qid >= vsi->netdev->real_num_tx_queues) return -EINVAL; err = xsk_pool_dma_map(pool, ice_pf_to_dev(vsi->back), ICE_RX_DMA_ATTR); if (err) return err; return 0; } /** * ice_realloc_rx_xdp_bufs - reallocate for either XSK or normal buffer * @rx_ring: Rx ring * @pool_present: is pool for XSK present * * Try allocating memory and return ENOMEM, if failed to allocate. * If allocation was successful, substitute buffer with allocated one. * Returns 0 on success, negative on failure */ static int ice_realloc_rx_xdp_bufs(struct ice_rx_ring *rx_ring, bool pool_present) { size_t elem_size = pool_present ? sizeof(*rx_ring->xdp_buf) : sizeof(*rx_ring->rx_buf); void *sw_ring = kcalloc(rx_ring->count, elem_size, GFP_KERNEL); if (!sw_ring) return -ENOMEM; if (pool_present) { kfree(rx_ring->rx_buf); rx_ring->rx_buf = NULL; rx_ring->xdp_buf = sw_ring; } else { kfree(rx_ring->xdp_buf); rx_ring->xdp_buf = NULL; rx_ring->rx_buf = sw_ring; } return 0; } /** * ice_realloc_zc_buf - reallocate XDP ZC queue pairs * @vsi: Current VSI * @zc: is zero copy set * * Reallocate buffer for rx_rings that might be used by XSK. * XDP requires more memory, than rx_buf provides. * Returns 0 on success, negative on failure */ int ice_realloc_zc_buf(struct ice_vsi *vsi, bool zc) { struct ice_rx_ring *rx_ring; uint i; ice_for_each_rxq(vsi, i) { rx_ring = vsi->rx_rings[i]; if (!rx_ring->xsk_pool) continue; if (ice_realloc_rx_xdp_bufs(rx_ring, zc)) return -ENOMEM; } return 0; } /** * ice_xsk_pool_setup - enable/disable a buffer pool region depending on its state * @vsi: Current VSI * @pool: buffer pool to enable/associate to a ring, NULL to disable * @qid: queue ID * * Returns 0 on success, negative on failure */ int ice_xsk_pool_setup(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid) { bool if_running, pool_present = !!pool; int ret = 0, pool_failure = 0; if (qid >= vsi->num_rxq || qid >= vsi->num_txq) { netdev_err(vsi->netdev, "Please use queue id in scope of combined queues count\n"); pool_failure = -EINVAL; goto failure; } if_running = !test_bit(ICE_VSI_DOWN, vsi->state) && ice_is_xdp_ena_vsi(vsi); if (if_running) { struct ice_rx_ring *rx_ring = vsi->rx_rings[qid]; ret = ice_qp_dis(vsi, qid); if (ret) { netdev_err(vsi->netdev, "ice_qp_dis error = %d\n", ret); goto xsk_pool_if_up; } ret = ice_realloc_rx_xdp_bufs(rx_ring, pool_present); if (ret) goto xsk_pool_if_up; } pool_failure = pool_present ? ice_xsk_pool_enable(vsi, pool, qid) : ice_xsk_pool_disable(vsi, qid); xsk_pool_if_up: if (if_running) { ret = ice_qp_ena(vsi, qid); if (!ret && pool_present) napi_schedule(&vsi->rx_rings[qid]->xdp_ring->q_vector->napi); else if (ret) netdev_err(vsi->netdev, "ice_qp_ena error = %d\n", ret); } failure: if (pool_failure) { netdev_err(vsi->netdev, "Could not %sable buffer pool, error = %d\n", pool_present ? "en" : "dis", pool_failure); return pool_failure; } return ret; } /** * ice_fill_rx_descs - pick buffers from XSK buffer pool and use it * @pool: XSK Buffer pool to pull the buffers from * @xdp: SW ring of xdp_buff that will hold the buffers * @rx_desc: Pointer to Rx descriptors that will be filled * @count: The number of buffers to allocate * * This function allocates a number of Rx buffers from the fill ring * or the internal recycle mechanism and places them on the Rx ring. * * Note that ring wrap should be handled by caller of this function. * * Returns the amount of allocated Rx descriptors */ static u16 ice_fill_rx_descs(struct xsk_buff_pool *pool, struct xdp_buff **xdp, union ice_32b_rx_flex_desc *rx_desc, u16 count) { dma_addr_t dma; u16 buffs; int i; buffs = xsk_buff_alloc_batch(pool, xdp, count); for (i = 0; i < buffs; i++) { dma = xsk_buff_xdp_get_dma(*xdp); rx_desc->read.pkt_addr = cpu_to_le64(dma); rx_desc->wb.status_error0 = 0; /* Put private info that changes on a per-packet basis * into xdp_buff_xsk->cb. */ ice_xdp_meta_set_desc(*xdp, rx_desc); rx_desc++; xdp++; } return buffs; } /** * __ice_alloc_rx_bufs_zc - allocate a number of Rx buffers * @rx_ring: Rx ring * @xsk_pool: XSK buffer pool to pick buffers to be filled by HW * @count: The number of buffers to allocate * * Place the @count of descriptors onto Rx ring. Handle the ring wrap * for case where space from next_to_use up to the end of ring is less * than @count. Finally do a tail bump. * * Returns true if all allocations were successful, false if any fail. */ static bool __ice_alloc_rx_bufs_zc(struct ice_rx_ring *rx_ring, struct xsk_buff_pool *xsk_pool, u16 count) { u32 nb_buffs_extra = 0, nb_buffs = 0; union ice_32b_rx_flex_desc *rx_desc; u16 ntu = rx_ring->next_to_use; u16 total_count = count; struct xdp_buff **xdp; rx_desc = ICE_RX_DESC(rx_ring, ntu); xdp = ice_xdp_buf(rx_ring, ntu); if (ntu + count >= rx_ring->count) { nb_buffs_extra = ice_fill_rx_descs(xsk_pool, xdp, rx_desc, rx_ring->count - ntu); if (nb_buffs_extra != rx_ring->count - ntu) { ntu += nb_buffs_extra; goto exit; } rx_desc = ICE_RX_DESC(rx_ring, 0); xdp = ice_xdp_buf(rx_ring, 0); ntu = 0; count -= nb_buffs_extra; ice_release_rx_desc(rx_ring, 0); } nb_buffs = ice_fill_rx_descs(xsk_pool, xdp, rx_desc, count); ntu += nb_buffs; if (ntu == rx_ring->count) ntu = 0; exit: if (rx_ring->next_to_use != ntu) ice_release_rx_desc(rx_ring, ntu); return total_count == (nb_buffs_extra + nb_buffs); } /** * ice_alloc_rx_bufs_zc - allocate a number of Rx buffers * @rx_ring: Rx ring * @xsk_pool: XSK buffer pool to pick buffers to be filled by HW * @count: The number of buffers to allocate * * Wrapper for internal allocation routine; figure out how many tail * bumps should take place based on the given threshold * * Returns true if all calls to internal alloc routine succeeded */ bool ice_alloc_rx_bufs_zc(struct ice_rx_ring *rx_ring, struct xsk_buff_pool *xsk_pool, u16 count) { u16 rx_thresh = ICE_RING_QUARTER(rx_ring); u16 leftover, i, tail_bumps; tail_bumps = count / rx_thresh; leftover = count - (tail_bumps * rx_thresh); for (i = 0; i < tail_bumps; i++) if (!__ice_alloc_rx_bufs_zc(rx_ring, xsk_pool, rx_thresh)) return false; return __ice_alloc_rx_bufs_zc(rx_ring, xsk_pool, leftover); } /** * ice_construct_skb_zc - Create an sk_buff from zero-copy buffer * @rx_ring: Rx ring * @xdp: Pointer to XDP buffer * * This function allocates a new skb from a zero-copy Rx buffer. * * Returns the skb on success, NULL on failure. */ static struct sk_buff * ice_construct_skb_zc(struct ice_rx_ring *rx_ring, struct xdp_buff *xdp) { unsigned int totalsize = xdp->data_end - xdp->data_meta; unsigned int metasize = xdp->data - xdp->data_meta; struct skb_shared_info *sinfo = NULL; struct sk_buff *skb; u32 nr_frags = 0; if (unlikely(xdp_buff_has_frags(xdp))) { sinfo = xdp_get_shared_info_from_buff(xdp); nr_frags = sinfo->nr_frags; } net_prefetch(xdp->data_meta); skb = napi_alloc_skb(&rx_ring->q_vector->napi, totalsize); if (unlikely(!skb)) return NULL; memcpy(__skb_put(skb, totalsize), xdp->data_meta, ALIGN(totalsize, sizeof(long))); if (metasize) { skb_metadata_set(skb, metasize); __skb_pull(skb, metasize); } if (likely(!xdp_buff_has_frags(xdp))) goto out; for (int i = 0; i < nr_frags; i++) { struct skb_shared_info *skinfo = skb_shinfo(skb); skb_frag_t *frag = &sinfo->frags[i]; struct page *page; void *addr; page = dev_alloc_page(); if (!page) { dev_kfree_skb(skb); return NULL; } addr = page_to_virt(page); memcpy(addr, skb_frag_page(frag), skb_frag_size(frag)); __skb_fill_page_desc_noacc(skinfo, skinfo->nr_frags++, addr, 0, skb_frag_size(frag)); } out: xsk_buff_free(xdp); return skb; } /** * ice_clean_xdp_irq_zc - produce AF_XDP descriptors to CQ * @xdp_ring: XDP Tx ring * @xsk_pool: AF_XDP buffer pool pointer */ static u32 ice_clean_xdp_irq_zc(struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool) { u16 ntc = xdp_ring->next_to_clean; struct ice_tx_desc *tx_desc; u16 cnt = xdp_ring->count; struct ice_tx_buf *tx_buf; u16 completed_frames = 0; u16 xsk_frames = 0; u16 last_rs; int i; last_rs = xdp_ring->next_to_use ? xdp_ring->next_to_use - 1 : cnt - 1; tx_desc = ICE_TX_DESC(xdp_ring, last_rs); if (tx_desc->cmd_type_offset_bsz & cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)) { if (last_rs >= ntc) completed_frames = last_rs - ntc + 1; else completed_frames = last_rs + cnt - ntc + 1; } if (!completed_frames) return 0; if (likely(!xdp_ring->xdp_tx_active)) { xsk_frames = completed_frames; goto skip; } ntc = xdp_ring->next_to_clean; for (i = 0; i < completed_frames; i++) { tx_buf = &xdp_ring->tx_buf[ntc]; if (tx_buf->type == ICE_TX_BUF_XSK_TX) { tx_buf->type = ICE_TX_BUF_EMPTY; xsk_buff_free(tx_buf->xdp); xdp_ring->xdp_tx_active--; } else { xsk_frames++; } ntc++; if (ntc >= xdp_ring->count) ntc = 0; } skip: tx_desc->cmd_type_offset_bsz = 0; xdp_ring->next_to_clean += completed_frames; if (xdp_ring->next_to_clean >= cnt) xdp_ring->next_to_clean -= cnt; if (xsk_frames) xsk_tx_completed(xsk_pool, xsk_frames); return completed_frames; } /** * ice_xmit_xdp_tx_zc - AF_XDP ZC handler for XDP_TX * @xdp: XDP buffer to xmit * @xdp_ring: XDP ring to produce descriptor onto * @xsk_pool: AF_XDP buffer pool pointer * * note that this function works directly on xdp_buff, no need to convert * it to xdp_frame. xdp_buff pointer is stored to ice_tx_buf so that cleaning * side will be able to xsk_buff_free() it. * * Returns ICE_XDP_TX for successfully produced desc, ICE_XDP_CONSUMED if there * was not enough space on XDP ring */ static int ice_xmit_xdp_tx_zc(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool) { struct skb_shared_info *sinfo = NULL; u32 size = xdp->data_end - xdp->data; u32 ntu = xdp_ring->next_to_use; struct ice_tx_desc *tx_desc; struct ice_tx_buf *tx_buf; struct xdp_buff *head; u32 nr_frags = 0; u32 free_space; u32 frag = 0; free_space = ICE_DESC_UNUSED(xdp_ring); if (free_space < ICE_RING_QUARTER(xdp_ring)) free_space += ice_clean_xdp_irq_zc(xdp_ring, xsk_pool); if (unlikely(!free_space)) goto busy; if (unlikely(xdp_buff_has_frags(xdp))) { sinfo = xdp_get_shared_info_from_buff(xdp); nr_frags = sinfo->nr_frags; if (free_space < nr_frags + 1) goto busy; } tx_desc = ICE_TX_DESC(xdp_ring, ntu); tx_buf = &xdp_ring->tx_buf[ntu]; head = xdp; for (;;) { dma_addr_t dma; dma = xsk_buff_xdp_get_dma(xdp); xsk_buff_raw_dma_sync_for_device(xsk_pool, dma, size); tx_buf->xdp = xdp; tx_buf->type = ICE_TX_BUF_XSK_TX; tx_desc->buf_addr = cpu_to_le64(dma); tx_desc->cmd_type_offset_bsz = ice_build_ctob(0, 0, size, 0); /* account for each xdp_buff from xsk_buff_pool */ xdp_ring->xdp_tx_active++; if (++ntu == xdp_ring->count) ntu = 0; if (frag == nr_frags) break; tx_desc = ICE_TX_DESC(xdp_ring, ntu); tx_buf = &xdp_ring->tx_buf[ntu]; xdp = xsk_buff_get_frag(head); size = skb_frag_size(&sinfo->frags[frag]); frag++; } xdp_ring->next_to_use = ntu; /* update last descriptor from a frame with EOP */ tx_desc->cmd_type_offset_bsz |= cpu_to_le64(ICE_TX_DESC_CMD_EOP << ICE_TXD_QW1_CMD_S); return ICE_XDP_TX; busy: xdp_ring->ring_stats->tx_stats.tx_busy++; return ICE_XDP_CONSUMED; } /** * ice_run_xdp_zc - Executes an XDP program in zero-copy path * @rx_ring: Rx ring * @xdp: xdp_buff used as input to the XDP program * @xdp_prog: XDP program to run * @xdp_ring: ring to be used for XDP_TX action * @xsk_pool: AF_XDP buffer pool pointer * * Returns any of ICE_XDP_{PASS, CONSUMED, TX, REDIR} */ static int ice_run_xdp_zc(struct ice_rx_ring *rx_ring, struct xdp_buff *xdp, struct bpf_prog *xdp_prog, struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool) { int err, result = ICE_XDP_PASS; u32 act; act = bpf_prog_run_xdp(xdp_prog, xdp); if (likely(act == XDP_REDIRECT)) { err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); if (!err) return ICE_XDP_REDIR; if (xsk_uses_need_wakeup(xsk_pool) && err == -ENOBUFS) result = ICE_XDP_EXIT; else result = ICE_XDP_CONSUMED; goto out_failure; } switch (act) { case XDP_PASS: break; case XDP_TX: result = ice_xmit_xdp_tx_zc(xdp, xdp_ring, xsk_pool); if (result == ICE_XDP_CONSUMED) goto out_failure; break; case XDP_DROP: result = ICE_XDP_CONSUMED; break; default: bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act); fallthrough; case XDP_ABORTED: result = ICE_XDP_CONSUMED; out_failure: trace_xdp_exception(rx_ring->netdev, xdp_prog, act); break; } return result; } static int ice_add_xsk_frag(struct ice_rx_ring *rx_ring, struct xdp_buff *first, struct xdp_buff *xdp, const unsigned int size) { struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(first); if (!size) return 0; if (!xdp_buff_has_frags(first)) { sinfo->nr_frags = 0; sinfo->xdp_frags_size = 0; xdp_buff_set_frags_flag(first); } if (unlikely(sinfo->nr_frags == MAX_SKB_FRAGS)) { xsk_buff_free(first); return -ENOMEM; } __skb_fill_page_desc_noacc(sinfo, sinfo->nr_frags++, virt_to_page(xdp->data_hard_start), XDP_PACKET_HEADROOM, size); sinfo->xdp_frags_size += size; xsk_buff_add_frag(xdp); return 0; } /** * ice_clean_rx_irq_zc - consumes packets from the hardware ring * @rx_ring: AF_XDP Rx ring * @xsk_pool: AF_XDP buffer pool pointer * @budget: NAPI budget * * Returns number of processed packets on success, remaining budget on failure. */ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, struct xsk_buff_pool *xsk_pool, int budget) { unsigned int total_rx_bytes = 0, total_rx_packets = 0; u32 ntc = rx_ring->next_to_clean; u32 ntu = rx_ring->next_to_use; struct xdp_buff *first = NULL; struct ice_tx_ring *xdp_ring; unsigned int xdp_xmit = 0; struct bpf_prog *xdp_prog; u32 cnt = rx_ring->count; bool failure = false; int entries_to_alloc; /* ZC patch is enabled only when XDP program is set, * so here it can not be NULL */ xdp_prog = READ_ONCE(rx_ring->xdp_prog); xdp_ring = rx_ring->xdp_ring; if (ntc != rx_ring->first_desc) first = *ice_xdp_buf(rx_ring, rx_ring->first_desc); while (likely(total_rx_packets < (unsigned int)budget)) { union ice_32b_rx_flex_desc *rx_desc; unsigned int size, xdp_res = 0; struct xdp_buff *xdp; struct sk_buff *skb; u16 stat_err_bits; u16 vlan_tci; rx_desc = ICE_RX_DESC(rx_ring, ntc); stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_DD_S); if (!ice_test_staterr(rx_desc->wb.status_error0, stat_err_bits)) break; /* This memory barrier is needed to keep us from reading * any other fields out of the rx_desc until we have * verified the descriptor has been written back. */ dma_rmb(); if (unlikely(ntc == ntu)) break; xdp = *ice_xdp_buf(rx_ring, ntc); size = le16_to_cpu(rx_desc->wb.pkt_len) & ICE_RX_FLX_DESC_PKT_LEN_M; xsk_buff_set_size(xdp, size); xsk_buff_dma_sync_for_cpu(xdp); if (!first) { first = xdp; } else if (ice_add_xsk_frag(rx_ring, first, xdp, size)) { break; } if (++ntc == cnt) ntc = 0; if (ice_is_non_eop(rx_ring, rx_desc)) continue; xdp_res = ice_run_xdp_zc(rx_ring, first, xdp_prog, xdp_ring, xsk_pool); if (likely(xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR))) { xdp_xmit |= xdp_res; } else if (xdp_res == ICE_XDP_EXIT) { failure = true; first = NULL; rx_ring->first_desc = ntc; break; } else if (xdp_res == ICE_XDP_CONSUMED) { xsk_buff_free(first); } else if (xdp_res == ICE_XDP_PASS) { goto construct_skb; } total_rx_bytes += xdp_get_buff_len(first); total_rx_packets++; first = NULL; rx_ring->first_desc = ntc; continue; construct_skb: /* XDP_PASS path */ skb = ice_construct_skb_zc(rx_ring, first); if (!skb) { rx_ring->ring_stats->rx_stats.alloc_buf_failed++; break; } first = NULL; rx_ring->first_desc = ntc; if (eth_skb_pad(skb)) { skb = NULL; continue; } total_rx_bytes += skb->len; total_rx_packets++; vlan_tci = ice_get_vlan_tci(rx_desc); ice_process_skb_fields(rx_ring, rx_desc, skb); ice_receive_skb(rx_ring, skb, vlan_tci); } rx_ring->next_to_clean = ntc; entries_to_alloc = ICE_RX_DESC_UNUSED(rx_ring); if (entries_to_alloc > ICE_RING_QUARTER(rx_ring)) failure |= !ice_alloc_rx_bufs_zc(rx_ring, xsk_pool, entries_to_alloc); ice_finalize_xdp_rx(xdp_ring, xdp_xmit, 0); ice_update_rx_ring_stats(rx_ring, total_rx_packets, total_rx_bytes); if (xsk_uses_need_wakeup(xsk_pool)) { /* ntu could have changed when allocating entries above, so * use rx_ring value instead of stack based one */ if (failure || ntc == rx_ring->next_to_use) xsk_set_rx_need_wakeup(xsk_pool); else xsk_clear_rx_need_wakeup(xsk_pool); return (int)total_rx_packets; } return failure ? budget : (int)total_rx_packets; } /** * ice_xmit_pkt - produce a single HW Tx descriptor out of AF_XDP descriptor * @xdp_ring: XDP ring to produce the HW Tx descriptor on * @xsk_pool: XSK buffer pool to pick buffers to be consumed by HW * @desc: AF_XDP descriptor to pull the DMA address and length from * @total_bytes: bytes accumulator that will be used for stats update */ static void ice_xmit_pkt(struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool, struct xdp_desc *desc, unsigned int *total_bytes) { struct ice_tx_desc *tx_desc; dma_addr_t dma; dma = xsk_buff_raw_get_dma(xsk_pool, desc->addr); xsk_buff_raw_dma_sync_for_device(xsk_pool, dma, desc->len); tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_to_use++); tx_desc->buf_addr = cpu_to_le64(dma); tx_desc->cmd_type_offset_bsz = ice_build_ctob(xsk_is_eop_desc(desc), 0, desc->len, 0); *total_bytes += desc->len; } /** * ice_xmit_pkt_batch - produce a batch of HW Tx descriptors out of AF_XDP descriptors * @xdp_ring: XDP ring to produce the HW Tx descriptors on * @xsk_pool: XSK buffer pool to pick buffers to be consumed by HW * @descs: AF_XDP descriptors to pull the DMA addresses and lengths from * @total_bytes: bytes accumulator that will be used for stats update */ static void ice_xmit_pkt_batch(struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool, struct xdp_desc *descs, unsigned int *total_bytes) { u16 ntu = xdp_ring->next_to_use; struct ice_tx_desc *tx_desc; u32 i; loop_unrolled_for(i = 0; i < PKTS_PER_BATCH; i++) { dma_addr_t dma; dma = xsk_buff_raw_get_dma(xsk_pool, descs[i].addr); xsk_buff_raw_dma_sync_for_device(xsk_pool, dma, descs[i].len); tx_desc = ICE_TX_DESC(xdp_ring, ntu++); tx_desc->buf_addr = cpu_to_le64(dma); tx_desc->cmd_type_offset_bsz = ice_build_ctob(xsk_is_eop_desc(&descs[i]), 0, descs[i].len, 0); *total_bytes += descs[i].len; } xdp_ring->next_to_use = ntu; } /** * ice_fill_tx_hw_ring - produce the number of Tx descriptors onto ring * @xdp_ring: XDP ring to produce the HW Tx descriptors on * @xsk_pool: XSK buffer pool to pick buffers to be consumed by HW * @descs: AF_XDP descriptors to pull the DMA addresses and lengths from * @nb_pkts: count of packets to be send * @total_bytes: bytes accumulator that will be used for stats update */ static void ice_fill_tx_hw_ring(struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool, struct xdp_desc *descs, u32 nb_pkts, unsigned int *total_bytes) { u32 batched, leftover, i; batched = ALIGN_DOWN(nb_pkts, PKTS_PER_BATCH); leftover = nb_pkts & (PKTS_PER_BATCH - 1); for (i = 0; i < batched; i += PKTS_PER_BATCH) ice_xmit_pkt_batch(xdp_ring, xsk_pool, &descs[i], total_bytes); for (; i < batched + leftover; i++) ice_xmit_pkt(xdp_ring, xsk_pool, &descs[i], total_bytes); } /** * ice_xmit_zc - take entries from XSK Tx ring and place them onto HW Tx ring * @xdp_ring: XDP ring to produce the HW Tx descriptors on * @xsk_pool: AF_XDP buffer pool pointer * * Returns true if there is no more work that needs to be done, false otherwise */ bool ice_xmit_zc(struct ice_tx_ring *xdp_ring, struct xsk_buff_pool *xsk_pool) { struct xdp_desc *descs = xsk_pool->tx_descs; u32 nb_pkts, nb_processed = 0; unsigned int total_bytes = 0; int budget; ice_clean_xdp_irq_zc(xdp_ring, xsk_pool); if (!netif_carrier_ok(xdp_ring->vsi->netdev) || !netif_running(xdp_ring->vsi->netdev)) return true; budget = ICE_DESC_UNUSED(xdp_ring); budget = min_t(u16, budget, ICE_RING_QUARTER(xdp_ring)); nb_pkts = xsk_tx_peek_release_desc_batch(xsk_pool, budget); if (!nb_pkts) return true; if (xdp_ring->next_to_use + nb_pkts >= xdp_ring->count) { nb_processed = xdp_ring->count - xdp_ring->next_to_use; ice_fill_tx_hw_ring(xdp_ring, xsk_pool, descs, nb_processed, &total_bytes); xdp_ring->next_to_use = 0; } ice_fill_tx_hw_ring(xdp_ring, xsk_pool, &descs[nb_processed], nb_pkts - nb_processed, &total_bytes); ice_set_rs_bit(xdp_ring); ice_xdp_ring_update_tail(xdp_ring); ice_update_tx_ring_stats(xdp_ring, nb_pkts, total_bytes); if (xsk_uses_need_wakeup(xsk_pool)) xsk_set_tx_need_wakeup(xsk_pool); return nb_pkts < budget; } /** * ice_xsk_wakeup - Implements ndo_xsk_wakeup * @netdev: net_device * @queue_id: queue to wake up * @flags: ignored in our case, since we have Rx and Tx in the same NAPI * * Returns negative on error, zero otherwise. */ int ice_xsk_wakeup(struct net_device *netdev, u32 queue_id, u32 __always_unused flags) { struct ice_netdev_priv *np = netdev_priv(netdev); struct ice_q_vector *q_vector; struct ice_vsi *vsi = np->vsi; struct ice_tx_ring *ring; if (test_bit(ICE_VSI_DOWN, vsi->state) || !netif_carrier_ok(netdev)) return -ENETDOWN; if (!ice_is_xdp_ena_vsi(vsi)) return -EINVAL; if (queue_id >= vsi->num_txq || queue_id >= vsi->num_rxq) return -EINVAL; ring = vsi->rx_rings[queue_id]->xdp_ring; if (!READ_ONCE(ring->xsk_pool)) return -EINVAL; /* The idea here is that if NAPI is running, mark a miss, so * it will run again. If not, trigger an interrupt and * schedule the NAPI from interrupt context. If NAPI would be * scheduled here, the interrupt affinity would not be * honored. */ q_vector = ring->q_vector; if (!napi_if_scheduled_mark_missed(&q_vector->napi)) ice_trigger_sw_intr(&vsi->back->hw, q_vector); return 0; } /** * ice_xsk_any_rx_ring_ena - Checks if Rx rings have AF_XDP buff pool attached * @vsi: VSI to be checked * * Returns true if any of the Rx rings has an AF_XDP buff pool attached */ bool ice_xsk_any_rx_ring_ena(struct ice_vsi *vsi) { int i; ice_for_each_rxq(vsi, i) { if (xsk_get_pool_from_qid(vsi->netdev, i)) return true; } return false; } /** * ice_xsk_clean_rx_ring - clean buffer pool queues connected to a given Rx ring * @rx_ring: ring to be cleaned */ void ice_xsk_clean_rx_ring(struct ice_rx_ring *rx_ring) { u16 ntc = rx_ring->next_to_clean; u16 ntu = rx_ring->next_to_use; while (ntc != ntu) { struct xdp_buff *xdp = *ice_xdp_buf(rx_ring, ntc); xsk_buff_free(xdp); ntc++; if (ntc >= rx_ring->count) ntc = 0; } } /** * ice_xsk_clean_xdp_ring - Clean the XDP Tx ring and its buffer pool queues * @xdp_ring: XDP_Tx ring */ void ice_xsk_clean_xdp_ring(struct ice_tx_ring *xdp_ring) { u16 ntc = xdp_ring->next_to_clean, ntu = xdp_ring->next_to_use; u32 xsk_frames = 0; while (ntc != ntu) { struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[ntc]; if (tx_buf->type == ICE_TX_BUF_XSK_TX) { tx_buf->type = ICE_TX_BUF_EMPTY; xsk_buff_free(tx_buf->xdp); } else { xsk_frames++; } ntc++; if (ntc >= xdp_ring->count) ntc = 0; } if (xsk_frames) xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames); }
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