diff options
Diffstat (limited to 'drivers/net/ethernet/intel/i40e')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_main.c | 22 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.c | 40 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 57 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_xsk.c | 126 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_xsk.h | 16 |
7 files changed, 192 insertions, 71 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index 537300e762f0..d231a2cdd98f 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -140,6 +140,7 @@ enum i40e_state_t { __I40E_CLIENT_RESET, __I40E_VIRTCHNL_OP_PENDING, __I40E_RECOVERY_MODE, + __I40E_VF_RESETS_DISABLED, /* disable resets during i40e_remove */ /* This must be last as it determines the size of the BITMAP */ __I40E_STATE_SIZE__, }; diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 4f8a2154b93f..1337686bd099 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -4010,8 +4010,16 @@ static irqreturn_t i40e_intr(int irq, void *data) } if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) { - ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK; - set_bit(__I40E_VFLR_EVENT_PENDING, pf->state); + /* disable any further VFLR event notifications */ + if (test_bit(__I40E_VF_RESETS_DISABLED, pf->state)) { + u32 reg = rd32(hw, I40E_PFINT_ICR0_ENA); + + reg &= ~I40E_PFINT_ICR0_VFLR_MASK; + wr32(hw, I40E_PFINT_ICR0_ENA, reg); + } else { + ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK; + set_bit(__I40E_VFLR_EVENT_PENDING, pf->state); + } } if (icr0 & I40E_PFINT_ICR0_GRST_MASK) { @@ -15311,6 +15319,11 @@ static void i40e_remove(struct pci_dev *pdev) while (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state)) usleep_range(1000, 2000); + if (pf->flags & I40E_FLAG_SRIOV_ENABLED) { + set_bit(__I40E_VF_RESETS_DISABLED, pf->state); + i40e_free_vfs(pf); + pf->flags &= ~I40E_FLAG_SRIOV_ENABLED; + } /* no more scheduling of any task */ set_bit(__I40E_SUSPENDED, pf->state); set_bit(__I40E_DOWN, pf->state); @@ -15337,11 +15350,6 @@ static void i40e_remove(struct pci_dev *pdev) */ i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], false); - if (pf->flags & I40E_FLAG_SRIOV_ENABLED) { - i40e_free_vfs(pf); - pf->flags &= ~I40E_FLAG_SRIOV_ENABLED; - } - i40e_fdir_teardown(pf); /* If there is a switch structure or any orphans, remove them. diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index d43ce13a93c9..4aca637d4a23 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -676,6 +676,8 @@ void i40e_free_tx_resources(struct i40e_ring *tx_ring) i40e_clean_tx_ring(tx_ring); kfree(tx_ring->tx_bi); tx_ring->tx_bi = NULL; + kfree(tx_ring->xsk_descs); + tx_ring->xsk_descs = NULL; if (tx_ring->desc) { dma_free_coherent(tx_ring->dev, tx_ring->size, @@ -1277,6 +1279,13 @@ int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring) if (!tx_ring->tx_bi) goto err; + if (ring_is_xdp(tx_ring)) { + tx_ring->xsk_descs = kcalloc(I40E_MAX_NUM_DESCRIPTORS, sizeof(*tx_ring->xsk_descs), + GFP_KERNEL); + if (!tx_ring->xsk_descs) + goto err; + } + u64_stats_init(&tx_ring->syncp); /* round up to nearest 4K */ @@ -1300,6 +1309,8 @@ int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring) return 0; err: + kfree(tx_ring->xsk_descs); + tx_ring->xsk_descs = NULL; kfree(tx_ring->tx_bi); tx_ring->tx_bi = NULL; return -ENOMEM; @@ -1436,7 +1447,7 @@ int i40e_setup_rx_descriptors(struct i40e_ring *rx_ring) /* XDP RX-queue info only needed for RX rings exposed to XDP */ if (rx_ring->vsi->type == I40E_VSI_MAIN) { err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, rx_ring->netdev, - rx_ring->queue_index); + rx_ring->queue_index, rx_ring->q_vector->napi.napi_id); if (err < 0) return err; } @@ -1850,6 +1861,7 @@ static inline bool i40e_page_is_reusable(struct page *page) * the adapter for another receive * * @rx_buffer: buffer containing the page + * @rx_buffer_pgcnt: buffer page refcount pre xdp_do_redirect() call * * If page is reusable, rx_buffer->page_offset is adjusted to point to * an unused region in the page. @@ -1872,7 +1884,8 @@ static inline bool i40e_page_is_reusable(struct page *page) * * In either case, if the page is reusable its refcount is increased. **/ -static bool i40e_can_reuse_rx_page(struct i40e_rx_buffer *rx_buffer) +static bool i40e_can_reuse_rx_page(struct i40e_rx_buffer *rx_buffer, + int rx_buffer_pgcnt) { unsigned int pagecnt_bias = rx_buffer->pagecnt_bias; struct page *page = rx_buffer->page; @@ -1883,7 +1896,7 @@ static bool i40e_can_reuse_rx_page(struct i40e_rx_buffer *rx_buffer) #if (PAGE_SIZE < 8192) /* if we are only owner of page we can reuse it */ - if (unlikely((page_count(page) - pagecnt_bias) > 1)) + if (unlikely((rx_buffer_pgcnt - pagecnt_bias) > 1)) return false; #else #define I40E_LAST_OFFSET \ @@ -1942,16 +1955,24 @@ static void i40e_add_rx_frag(struct i40e_ring *rx_ring, * i40e_get_rx_buffer - Fetch Rx buffer and synchronize data for use * @rx_ring: rx descriptor ring to transact packets on * @size: size of buffer to add to skb + * @rx_buffer_pgcnt: buffer page refcount * * This function will pull an Rx buffer from the ring and synchronize it * for use by the CPU. */ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring, - const unsigned int size) + const unsigned int size, + int *rx_buffer_pgcnt) { struct i40e_rx_buffer *rx_buffer; rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean); + *rx_buffer_pgcnt = +#if (PAGE_SIZE < 8192) + page_count(rx_buffer->page); +#else + 0; +#endif prefetch_page_address(rx_buffer->page); /* we are reusing so sync this buffer for CPU use */ @@ -2102,14 +2123,16 @@ static struct sk_buff *i40e_build_skb(struct i40e_ring *rx_ring, * i40e_put_rx_buffer - Clean up used buffer and either recycle or free * @rx_ring: rx descriptor ring to transact packets on * @rx_buffer: rx buffer to pull data from + * @rx_buffer_pgcnt: rx buffer page refcount pre xdp_do_redirect() call * * This function will clean up the contents of the rx_buffer. It will * either recycle the buffer or unmap it and free the associated resources. */ static void i40e_put_rx_buffer(struct i40e_ring *rx_ring, - struct i40e_rx_buffer *rx_buffer) + struct i40e_rx_buffer *rx_buffer, + int rx_buffer_pgcnt) { - if (i40e_can_reuse_rx_page(rx_buffer)) { + if (i40e_can_reuse_rx_page(rx_buffer, rx_buffer_pgcnt)) { /* hand second half of page back to the ring */ i40e_reuse_rx_page(rx_ring, rx_buffer); } else { @@ -2336,6 +2359,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) while (likely(total_rx_packets < (unsigned int)budget)) { struct i40e_rx_buffer *rx_buffer; union i40e_rx_desc *rx_desc; + int rx_buffer_pgcnt; unsigned int size; u64 qword; @@ -2378,7 +2402,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) break; i40e_trace(clean_rx_irq, rx_ring, rx_desc, skb); - rx_buffer = i40e_get_rx_buffer(rx_ring, size); + rx_buffer = i40e_get_rx_buffer(rx_ring, size, &rx_buffer_pgcnt); /* retrieve a buffer from the ring */ if (!skb) { @@ -2421,7 +2445,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) break; } - i40e_put_rx_buffer(rx_ring, rx_buffer); + i40e_put_rx_buffer(rx_ring, rx_buffer, rx_buffer_pgcnt); cleaned_count++; if (i40e_is_non_eop(rx_ring, rx_desc, skb)) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index 2feed920ef8a..5f531b195959 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -389,6 +389,7 @@ struct i40e_ring { struct i40e_channel *ch; struct xdp_rxq_info xdp_rxq; struct xsk_buff_pool *xsk_pool; + struct xdp_desc *xsk_descs; /* For storing descriptors in the AF_XDP ZC path */ } ____cacheline_internodealigned_in_smp; static inline bool ring_uses_build_skb(struct i40e_ring *ring) diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index c96e2f2d4cba..729c4f0d5ac5 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -63,7 +63,7 @@ static void i40e_vc_notify_vf_link_state(struct i40e_vf *vf) } else if (vf->link_forced) { pfe.event_data.link_event.link_status = vf->link_up; pfe.event_data.link_event.link_speed = - (vf->link_up ? VIRTCHNL_LINK_SPEED_40GB : 0); + (vf->link_up ? i40e_virtchnl_link_speed(ls->link_speed) : 0); } else { pfe.event_data.link_event.link_status = ls->link_info & I40E_AQ_LINK_UP; @@ -1403,7 +1403,8 @@ static void i40e_cleanup_reset_vf(struct i40e_vf *vf) * @vf: pointer to the VF structure * @flr: VFLR was issued or not * - * Returns true if the VF is reset, false otherwise. + * Returns true if the VF is in reset, resets successfully, or resets + * are disabled and false otherwise. **/ bool i40e_reset_vf(struct i40e_vf *vf, bool flr) { @@ -1413,11 +1414,14 @@ bool i40e_reset_vf(struct i40e_vf *vf, bool flr) u32 reg; int i; + if (test_bit(__I40E_VF_RESETS_DISABLED, pf->state)) + return true; + /* If the VFs have been disabled, this means something else is * resetting the VF, so we shouldn't continue. */ if (test_and_set_bit(__I40E_VF_DISABLE, pf->state)) - return false; + return true; i40e_trigger_vf_reset(vf, flr); @@ -1581,6 +1585,15 @@ void i40e_free_vfs(struct i40e_pf *pf) i40e_notify_client_of_vf_enable(pf, 0); + /* Disable IOV before freeing resources. This lets any VF drivers + * running in the host get themselves cleaned up before we yank + * the carpet out from underneath their feet. + */ + if (!pci_vfs_assigned(pf->pdev)) + pci_disable_sriov(pf->pdev); + else + dev_warn(&pf->pdev->dev, "VFs are assigned - not disabling SR-IOV\n"); + /* Amortize wait time by stopping all VFs at the same time */ for (i = 0; i < pf->num_alloc_vfs; i++) { if (test_bit(I40E_VF_STATE_INIT, &pf->vf[i].vf_states)) @@ -1596,15 +1609,6 @@ void i40e_free_vfs(struct i40e_pf *pf) i40e_vsi_wait_queues_disabled(pf->vsi[pf->vf[i].lan_vsi_idx]); } - /* Disable IOV before freeing resources. This lets any VF drivers - * running in the host get themselves cleaned up before we yank - * the carpet out from underneath their feet. - */ - if (!pci_vfs_assigned(pf->pdev)) - pci_disable_sriov(pf->pdev); - else - dev_warn(&pf->pdev->dev, "VFs are assigned - not disabling SR-IOV\n"); - /* free up VF resources */ tmp = pf->num_alloc_vfs; pf->num_alloc_vfs = 0; @@ -2713,6 +2717,10 @@ static int i40e_vc_add_mac_addr_msg(struct i40e_vf *vf, u8 *msg) spin_unlock_bh(&vsi->mac_filter_hash_lock); goto error_param; } + if (is_valid_ether_addr(al->list[i].addr) && + is_zero_ether_addr(vf->default_lan_addr.addr)) + ether_addr_copy(vf->default_lan_addr.addr, + al->list[i].addr); } } spin_unlock_bh(&vsi->mac_filter_hash_lock); @@ -2740,6 +2748,7 @@ static int i40e_vc_del_mac_addr_msg(struct i40e_vf *vf, u8 *msg) { struct virtchnl_ether_addr_list *al = (struct virtchnl_ether_addr_list *)msg; + bool was_unimac_deleted = false; struct i40e_pf *pf = vf->pf; struct i40e_vsi *vsi = NULL; i40e_status ret = 0; @@ -2759,6 +2768,8 @@ static int i40e_vc_del_mac_addr_msg(struct i40e_vf *vf, u8 *msg) ret = I40E_ERR_INVALID_MAC_ADDR; goto error_param; } + if (ether_addr_equal(al->list[i].addr, vf->default_lan_addr.addr)) + was_unimac_deleted = true; } vsi = pf->vsi[vf->lan_vsi_idx]; @@ -2779,10 +2790,25 @@ static int i40e_vc_del_mac_addr_msg(struct i40e_vf *vf, u8 *msg) dev_err(&pf->pdev->dev, "Unable to program VF %d MAC filters, error %d\n", vf->vf_id, ret); + if (vf->trusted && was_unimac_deleted) { + struct i40e_mac_filter *f; + struct hlist_node *h; + u8 *macaddr = NULL; + int bkt; + + /* set last unicast mac address as default */ + spin_lock_bh(&vsi->mac_filter_hash_lock); + hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) { + if (is_valid_ether_addr(f->macaddr)) + macaddr = f->macaddr; + } + if (macaddr) + ether_addr_copy(vf->default_lan_addr.addr, macaddr); + spin_unlock_bh(&vsi->mac_filter_hash_lock); + } error_param: /* send the response to the VF */ - return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_DEL_ETH_ADDR, - ret); + return i40e_vc_send_resp_to_vf(vf, VIRTCHNL_OP_DEL_ETH_ADDR, ret); } /** @@ -4415,6 +4441,7 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link) { struct i40e_netdev_priv *np = netdev_priv(netdev); struct i40e_pf *pf = np->vsi->back; + struct i40e_link_status *ls = &pf->hw.phy.link_info; struct virtchnl_pf_event pfe; struct i40e_hw *hw = &pf->hw; struct i40e_vf *vf; @@ -4452,7 +4479,7 @@ int i40e_ndo_set_vf_link_state(struct net_device *netdev, int vf_id, int link) vf->link_forced = true; vf->link_up = true; pfe.event_data.link_event.link_status = true; - pfe.event_data.link_event.link_speed = VIRTCHNL_LINK_SPEED_40GB; + pfe.event_data.link_event.link_speed = i40e_virtchnl_link_speed(ls->link_speed); break; case IFLA_VF_LINK_STATE_DISABLE: vf->link_forced = true; diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index 6acede0acdca..bfa84bfb0488 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -2,6 +2,7 @@ /* Copyright(c) 2018 Intel Corporation. */ #include <linux/bpf_trace.h> +#include <linux/stringify.h> #include <net/xdp_sock_drv.h> #include <net/xdp.h> @@ -281,8 +282,8 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget) unsigned int total_rx_bytes = 0, total_rx_packets = 0; u16 cleaned_count = I40E_DESC_UNUSED(rx_ring); unsigned int xdp_res, xdp_xmit = 0; + bool failure = false; struct sk_buff *skb; - bool failure; while (likely(total_rx_packets < (unsigned int)budget)) { union i40e_rx_desc *rx_desc; @@ -311,7 +312,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget) continue; } - bi = i40e_rx_bi(rx_ring, rx_ring->next_to_clean); size = (qword & I40E_RXD_QW1_LENGTH_PBUF_MASK) >> I40E_RXD_QW1_LENGTH_PBUF_SHIFT; if (!size) @@ -381,58 +381,102 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget) return failure ? budget : (int)total_rx_packets; } -/** - * i40e_xmit_zc - Performs zero-copy Tx AF_XDP - * @xdp_ring: XDP Tx ring - * @budget: NAPI budget - * - * Returns true if the work is finished. - **/ -static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget) +static void i40e_xmit_pkt(struct i40e_ring *xdp_ring, struct xdp_desc *desc, + unsigned int *total_bytes) { - unsigned int sent_frames = 0, total_bytes = 0; - struct i40e_tx_desc *tx_desc = NULL; - struct i40e_tx_buffer *tx_bi; - struct xdp_desc desc; + struct i40e_tx_desc *tx_desc; dma_addr_t dma; - while (budget-- > 0) { - if (!xsk_tx_peek_desc(xdp_ring->xsk_pool, &desc)) - break; + dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc->addr); + xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, desc->len); - dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc.addr); - xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, - desc.len); + tx_desc = I40E_TX_DESC(xdp_ring, xdp_ring->next_to_use++); + tx_desc->buffer_addr = cpu_to_le64(dma); + tx_desc->cmd_type_offset_bsz = build_ctob(I40E_TX_DESC_CMD_ICRC | I40E_TX_DESC_CMD_EOP, + 0, desc->len, 0); - tx_bi = &xdp_ring->tx_bi[xdp_ring->next_to_use]; - tx_bi->bytecount = desc.len; + *total_bytes += desc->len; +} - tx_desc = I40E_TX_DESC(xdp_ring, xdp_ring->next_to_use); - tx_desc->buffer_addr = cpu_to_le64(dma); - tx_desc->cmd_type_offset_bsz = - build_ctob(I40E_TX_DESC_CMD_ICRC - | I40E_TX_DESC_CMD_EOP, - 0, desc.len, 0); +static void i40e_xmit_pkt_batch(struct i40e_ring *xdp_ring, struct xdp_desc *desc, + unsigned int *total_bytes) +{ + u16 ntu = xdp_ring->next_to_use; + struct i40e_tx_desc *tx_desc; + dma_addr_t dma; + u32 i; - sent_frames++; - total_bytes += tx_bi->bytecount; + loop_unrolled_for(i = 0; i < PKTS_PER_BATCH; i++) { + dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc[i].addr); + xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, desc[i].len); - xdp_ring->next_to_use++; - if (xdp_ring->next_to_use == xdp_ring->count) - xdp_ring->next_to_use = 0; + tx_desc = I40E_TX_DESC(xdp_ring, ntu++); + tx_desc->buffer_addr = cpu_to_le64(dma); + tx_desc->cmd_type_offset_bsz = build_ctob(I40E_TX_DESC_CMD_ICRC | + I40E_TX_DESC_CMD_EOP, + 0, desc[i].len, 0); + + *total_bytes += desc[i].len; } - if (tx_desc) { - /* Request an interrupt for the last frame and bump tail ptr. */ - tx_desc->cmd_type_offset_bsz |= (I40E_TX_DESC_CMD_RS << - I40E_TXD_QW1_CMD_SHIFT); - i40e_xdp_ring_update_tail(xdp_ring); + xdp_ring->next_to_use = ntu; +} - xsk_tx_release(xdp_ring->xsk_pool); - i40e_update_tx_stats(xdp_ring, sent_frames, total_bytes); +static void i40e_fill_tx_hw_ring(struct i40e_ring *xdp_ring, struct xdp_desc *descs, u32 nb_pkts, + unsigned int *total_bytes) +{ + u32 batched, leftover, i; + + batched = nb_pkts & ~(PKTS_PER_BATCH - 1); + leftover = nb_pkts & (PKTS_PER_BATCH - 1); + for (i = 0; i < batched; i += PKTS_PER_BATCH) + i40e_xmit_pkt_batch(xdp_ring, &descs[i], total_bytes); + for (i = batched; i < batched + leftover; i++) + i40e_xmit_pkt(xdp_ring, &descs[i], total_bytes); +} + +static void i40e_set_rs_bit(struct i40e_ring *xdp_ring) +{ + u16 ntu = xdp_ring->next_to_use ? xdp_ring->next_to_use - 1 : xdp_ring->count - 1; + struct i40e_tx_desc *tx_desc; + + tx_desc = I40E_TX_DESC(xdp_ring, ntu); + tx_desc->cmd_type_offset_bsz |= (I40E_TX_DESC_CMD_RS << I40E_TXD_QW1_CMD_SHIFT); +} + +/** + * i40e_xmit_zc - Performs zero-copy Tx AF_XDP + * @xdp_ring: XDP Tx ring + * @budget: NAPI budget + * + * Returns true if the work is finished. + **/ +static bool i40e_xmit_zc(struct i40e_ring *xdp_ring, unsigned int budget) +{ + struct xdp_desc *descs = xdp_ring->xsk_descs; + u32 nb_pkts, nb_processed = 0; + unsigned int total_bytes = 0; + + nb_pkts = xsk_tx_peek_release_desc_batch(xdp_ring->xsk_pool, descs, budget); + if (!nb_pkts) + return false; + + if (xdp_ring->next_to_use + nb_pkts >= xdp_ring->count) { + nb_processed = xdp_ring->count - xdp_ring->next_to_use; + i40e_fill_tx_hw_ring(xdp_ring, descs, nb_processed, &total_bytes); + xdp_ring->next_to_use = 0; } - return !!budget; + i40e_fill_tx_hw_ring(xdp_ring, &descs[nb_processed], nb_pkts - nb_processed, + &total_bytes); + + /* Request an interrupt for the last frame and bump tail ptr. */ + i40e_set_rs_bit(xdp_ring); + i40e_xdp_ring_update_tail(xdp_ring); + + i40e_update_tx_stats(xdp_ring, nb_pkts, total_bytes); + + return true; } /** diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.h b/drivers/net/ethernet/intel/i40e/i40e_xsk.h index 7adfd8539247..ea88f4597a07 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.h +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.h @@ -4,6 +4,22 @@ #ifndef _I40E_XSK_H_ #define _I40E_XSK_H_ +/* This value should match the pragma in the loop_unrolled_for + * macro. Why 4? It is strictly empirical. It seems to be a good + * compromise between the advantage of having simultaneous outstanding + * reads to the DMA array that can hide each others latency and the + * disadvantage of having a larger code path. + */ +#define PKTS_PER_BATCH 4 + +#ifdef __clang__ +#define loop_unrolled_for _Pragma("clang loop unroll_count(4)") for +#elif __GNUC__ >= 8 +#define loop_unrolled_for _Pragma("GCC unroll 4") for +#else +#define loop_unrolled_for for +#endif + struct i40e_vsi; struct xsk_buff_pool; struct zero_copy_allocator; |