diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net_common.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 2311 |
1 files changed, 332 insertions, 1979 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 850bfdf83d0a..27f4786ace4f 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) -/* Copyright (C) 2015-2018 Netronome Systems, Inc. */ +/* Copyright (C) 2015-2019 Netronome Systems, Inc. */ /* * nfp_net_common.c @@ -13,7 +13,6 @@ #include <linux/bitfield.h> #include <linux/bpf.h> -#include <linux/bpf_trace.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> @@ -32,19 +31,24 @@ #include <linux/ethtool.h> #include <linux/log2.h> #include <linux/if_vlan.h> +#include <linux/if_bridge.h> #include <linux/random.h> #include <linux/vmalloc.h> #include <linux/ktime.h> #include <net/tls.h> #include <net/vxlan.h> +#include <net/xdp_sock_drv.h> +#include "nfpcore/nfp_dev.h" #include "nfpcore/nfp_nsp.h" #include "ccm.h" #include "nfp_app.h" #include "nfp_net_ctrl.h" #include "nfp_net.h" +#include "nfp_net_dp.h" #include "nfp_net_sriov.h" +#include "nfp_net_xsk.h" #include "nfp_port.h" #include "crypto/crypto.h" #include "crypto/fw.h" @@ -63,33 +67,10 @@ void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, put_unaligned_le32(reg, fw_ver); } -static dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag) +u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue) { - return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM, - dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, - dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); -} - -static void -nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr) -{ - dma_sync_single_for_device(dp->dev, dma_addr, - dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, - dp->rx_dma_dir); -} - -static void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr) -{ - dma_unmap_single_attrs(dp->dev, dma_addr, - dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, - dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); -} - -static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr, - unsigned int len) -{ - dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM, - len, dp->rx_dma_dir); + queue &= dev_info->qc_idx_mask; + return dev_info->qc_addr_offset + NFP_QCP_QUEUE_ADDR_SZ * queue; } /* Firmware reconfig @@ -375,19 +356,6 @@ int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd) */ /** - * nfp_net_irq_unmask() - Unmask automasked interrupt - * @nn: NFP Network structure - * @entry_nr: MSI-X table entry - * - * Clear the ICR for the IRQ entry. - */ -static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) -{ - nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); - nn_pci_flush(nn); -} - -/** * nfp_net_irqs_alloc() - allocates MSI-X irqs * @pdev: PCI device structure * @irq_entries: Array to be initialized and used to hold the irq entries @@ -506,19 +474,22 @@ static void nfp_net_read_link_status(struct nfp_net *nn) { unsigned long flags; bool link_up; - u32 sts; + u16 sts; spin_lock_irqsave(&nn->link_status_lock, flags); - sts = nn_readl(nn, NFP_NET_CFG_STS); + sts = nn_readw(nn, NFP_NET_CFG_STS); link_up = !!(sts & NFP_NET_CFG_STS_LINK); if (nn->link_up == link_up) goto out; nn->link_up = link_up; - if (nn->port) + if (nn->port) { set_bit(NFP_PORT_CHANGED, &nn->port->flags); + if (nn->port->link_cb) + nn->port->link_cb(nn->port); + } if (nn->link_up) { netif_carrier_on(nn->dp.netdev); @@ -569,49 +540,6 @@ static irqreturn_t nfp_net_irq_exn(int irq, void *data) } /** - * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring - * @tx_ring: TX ring structure - * @r_vec: IRQ vector servicing this ring - * @idx: Ring index - * @is_xdp: Is this an XDP TX ring? - */ -static void -nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, - struct nfp_net_r_vector *r_vec, unsigned int idx, - bool is_xdp) -{ - struct nfp_net *nn = r_vec->nfp_net; - - tx_ring->idx = idx; - tx_ring->r_vec = r_vec; - tx_ring->is_xdp = is_xdp; - u64_stats_init(&tx_ring->r_vec->tx_sync); - - tx_ring->qcidx = tx_ring->idx * nn->stride_tx; - tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); -} - -/** - * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring - * @rx_ring: RX ring structure - * @r_vec: IRQ vector servicing this ring - * @idx: Ring index - */ -static void -nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, - struct nfp_net_r_vector *r_vec, unsigned int idx) -{ - struct nfp_net *nn = r_vec->nfp_net; - - rx_ring->idx = idx; - rx_ring->r_vec = r_vec; - u64_stats_init(&rx_ring->r_vec->rx_sync); - - rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; - rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); -} - -/** * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) * @nn: NFP Network structure * @ctrl_offset: Control BAR offset where IRQ configuration should be written @@ -658,178 +586,7 @@ static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, free_irq(nn->irq_entries[vector_idx].vector, nn); } -/* Transmit - * - * One queue controller peripheral queue is used for transmit. The - * driver en-queues packets for transmit by advancing the write - * pointer. The device indicates that packets have transmitted by - * advancing the read pointer. The driver maintains a local copy of - * the read and write pointer in @struct nfp_net_tx_ring. The driver - * keeps @wr_p in sync with the queue controller write pointer and can - * determine how many packets have been transmitted by comparing its - * copy of the read pointer @rd_p with the read pointer maintained by - * the queue controller peripheral. - */ - -/** - * nfp_net_tx_full() - Check if the TX ring is full - * @tx_ring: TX ring to check - * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) - * - * This function checks, based on the *host copy* of read/write - * pointer if a given TX ring is full. The real TX queue may have - * some newly made available slots. - * - * Return: True if the ring is full. - */ -static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) -{ - return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); -} - -/* Wrappers for deciding when to stop and restart TX queues */ -static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) -{ - return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); -} - -static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) -{ - return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); -} - -/** - * nfp_net_tx_ring_stop() - stop tx ring - * @nd_q: netdev queue - * @tx_ring: driver tx queue structure - * - * Safely stop TX ring. Remember that while we are running .start_xmit() - * someone else may be cleaning the TX ring completions so we need to be - * extra careful here. - */ -static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, - struct nfp_net_tx_ring *tx_ring) -{ - netif_tx_stop_queue(nd_q); - - /* We can race with the TX completion out of NAPI so recheck */ - smp_mb(); - if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) - netif_tx_start_queue(nd_q); -} - -/** - * nfp_net_tx_tso() - Set up Tx descriptor for LSO - * @r_vec: per-ring structure - * @txbuf: Pointer to driver soft TX descriptor - * @txd: Pointer to HW TX descriptor - * @skb: Pointer to SKB - * @md_bytes: Prepend length - * - * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. - * Return error on packet header greater than maximum supported LSO header size. - */ -static void nfp_net_tx_tso(struct nfp_net_r_vector *r_vec, - struct nfp_net_tx_buf *txbuf, - struct nfp_net_tx_desc *txd, struct sk_buff *skb, - u32 md_bytes) -{ - u32 l3_offset, l4_offset, hdrlen; - u16 mss; - - if (!skb_is_gso(skb)) - return; - - if (!skb->encapsulation) { - l3_offset = skb_network_offset(skb); - l4_offset = skb_transport_offset(skb); - hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); - } else { - l3_offset = skb_inner_network_offset(skb); - l4_offset = skb_inner_transport_offset(skb); - hdrlen = skb_inner_transport_header(skb) - skb->data + - inner_tcp_hdrlen(skb); - } - - txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; - txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); - - mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; - txd->l3_offset = l3_offset - md_bytes; - txd->l4_offset = l4_offset - md_bytes; - txd->lso_hdrlen = hdrlen - md_bytes; - txd->mss = cpu_to_le16(mss); - txd->flags |= PCIE_DESC_TX_LSO; - - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_lso++; - u64_stats_update_end(&r_vec->tx_sync); -} - -/** - * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor - * @dp: NFP Net data path struct - * @r_vec: per-ring structure - * @txbuf: Pointer to driver soft TX descriptor - * @txd: Pointer to TX descriptor - * @skb: Pointer to SKB - * - * This function sets the TX checksum flags in the TX descriptor based - * on the configuration and the protocol of the packet to be transmitted. - */ -static void nfp_net_tx_csum(struct nfp_net_dp *dp, - struct nfp_net_r_vector *r_vec, - struct nfp_net_tx_buf *txbuf, - struct nfp_net_tx_desc *txd, struct sk_buff *skb) -{ - struct ipv6hdr *ipv6h; - struct iphdr *iph; - u8 l4_hdr; - - if (!(dp->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) - return; - - if (skb->ip_summed != CHECKSUM_PARTIAL) - return; - - txd->flags |= PCIE_DESC_TX_CSUM; - if (skb->encapsulation) - txd->flags |= PCIE_DESC_TX_ENCAP; - - iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); - ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); - - if (iph->version == 4) { - txd->flags |= PCIE_DESC_TX_IP4_CSUM; - l4_hdr = iph->protocol; - } else if (ipv6h->version == 6) { - l4_hdr = ipv6h->nexthdr; - } else { - nn_dp_warn(dp, "partial checksum but ipv=%x!\n", iph->version); - return; - } - - switch (l4_hdr) { - case IPPROTO_TCP: - txd->flags |= PCIE_DESC_TX_TCP_CSUM; - break; - case IPPROTO_UDP: - txd->flags |= PCIE_DESC_TX_UDP_CSUM; - break; - default: - nn_dp_warn(dp, "partial checksum but l4 proto=%x!\n", l4_hdr); - return; - } - - u64_stats_update_begin(&r_vec->tx_sync); - if (skb->encapsulation) - r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; - else - r_vec->hw_csum_tx += txbuf->pkt_cnt; - u64_stats_update_end(&r_vec->tx_sync); -} - -static struct sk_buff * +struct sk_buff * nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, struct sk_buff *skb, u64 *tls_handle, int *nr_frags) { @@ -844,7 +601,7 @@ nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)) return skb; - datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb)); + datalen = skb->len - skb_tcp_all_headers(skb); seq = ntohl(tcp_hdr(skb)->seq); ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX); resync_pending = tls_offload_tx_resync_pending(skb->sk); @@ -901,7 +658,7 @@ nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, return skb; } -static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle) +void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle) { #ifdef CONFIG_TLS_DEVICE struct nfp_net_tls_offload_ctx *ntls; @@ -912,7 +669,7 @@ static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle) if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))) return; - datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb)); + datalen = skb->len - skb_tcp_all_headers(skb); seq = ntohl(tcp_hdr(skb)->seq); ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX); @@ -923,411 +680,6 @@ static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle) #endif } -static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring) -{ - wmb(); - nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); - tx_ring->wr_ptr_add = 0; -} - -static int nfp_net_prep_tx_meta(struct sk_buff *skb, u64 tls_handle) -{ - struct metadata_dst *md_dst = skb_metadata_dst(skb); - unsigned char *data; - u32 meta_id = 0; - int md_bytes; - - if (likely(!md_dst && !tls_handle)) - return 0; - if (unlikely(md_dst && md_dst->type != METADATA_HW_PORT_MUX)) { - if (!tls_handle) - return 0; - md_dst = NULL; - } - - md_bytes = 4 + !!md_dst * 4 + !!tls_handle * 8; - - if (unlikely(skb_cow_head(skb, md_bytes))) - return -ENOMEM; - - meta_id = 0; - data = skb_push(skb, md_bytes) + md_bytes; - if (md_dst) { - data -= 4; - put_unaligned_be32(md_dst->u.port_info.port_id, data); - meta_id = NFP_NET_META_PORTID; - } - if (tls_handle) { - /* conn handle is opaque, we just use u64 to be able to quickly - * compare it to zero - */ - data -= 8; - memcpy(data, &tls_handle, sizeof(tls_handle)); - meta_id <<= NFP_NET_META_FIELD_SIZE; - meta_id |= NFP_NET_META_CONN_HANDLE; - } - - data -= 4; - put_unaligned_be32(meta_id, data); - - return md_bytes; -} - -/** - * nfp_net_tx() - Main transmit entry point - * @skb: SKB to transmit - * @netdev: netdev structure - * - * Return: NETDEV_TX_OK on success. - */ -static netdev_tx_t nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) -{ - struct nfp_net *nn = netdev_priv(netdev); - const skb_frag_t *frag; - int f, nr_frags, wr_idx, md_bytes; - struct nfp_net_tx_ring *tx_ring; - struct nfp_net_r_vector *r_vec; - struct nfp_net_tx_buf *txbuf; - struct nfp_net_tx_desc *txd; - struct netdev_queue *nd_q; - struct nfp_net_dp *dp; - dma_addr_t dma_addr; - unsigned int fsize; - u64 tls_handle = 0; - u16 qidx; - - dp = &nn->dp; - qidx = skb_get_queue_mapping(skb); - tx_ring = &dp->tx_rings[qidx]; - r_vec = tx_ring->r_vec; - - nr_frags = skb_shinfo(skb)->nr_frags; - - if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { - nn_dp_warn(dp, "TX ring %d busy. wrp=%u rdp=%u\n", - qidx, tx_ring->wr_p, tx_ring->rd_p); - nd_q = netdev_get_tx_queue(dp->netdev, qidx); - netif_tx_stop_queue(nd_q); - nfp_net_tx_xmit_more_flush(tx_ring); - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_busy++; - u64_stats_update_end(&r_vec->tx_sync); - return NETDEV_TX_BUSY; - } - - skb = nfp_net_tls_tx(dp, r_vec, skb, &tls_handle, &nr_frags); - if (unlikely(!skb)) { - nfp_net_tx_xmit_more_flush(tx_ring); - return NETDEV_TX_OK; - } - - md_bytes = nfp_net_prep_tx_meta(skb, tls_handle); - if (unlikely(md_bytes < 0)) - goto err_flush; - - /* Start with the head skbuf */ - dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), - DMA_TO_DEVICE); - if (dma_mapping_error(dp->dev, dma_addr)) - goto err_dma_err; - - wr_idx = D_IDX(tx_ring, tx_ring->wr_p); - - /* Stash the soft descriptor of the head then initialize it */ - txbuf = &tx_ring->txbufs[wr_idx]; - txbuf->skb = skb; - txbuf->dma_addr = dma_addr; - txbuf->fidx = -1; - txbuf->pkt_cnt = 1; - txbuf->real_len = skb->len; - - /* Build TX descriptor */ - txd = &tx_ring->txds[wr_idx]; - txd->offset_eop = (nr_frags ? 0 : PCIE_DESC_TX_EOP) | md_bytes; - txd->dma_len = cpu_to_le16(skb_headlen(skb)); - nfp_desc_set_dma_addr(txd, dma_addr); - txd->data_len = cpu_to_le16(skb->len); - - txd->flags = 0; - txd->mss = 0; - txd->lso_hdrlen = 0; - - /* Do not reorder - tso may adjust pkt cnt, vlan may override fields */ - nfp_net_tx_tso(r_vec, txbuf, txd, skb, md_bytes); - nfp_net_tx_csum(dp, r_vec, txbuf, txd, skb); - if (skb_vlan_tag_present(skb) && dp->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { - txd->flags |= PCIE_DESC_TX_VLAN; - txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); - } - - /* Gather DMA */ - if (nr_frags > 0) { - __le64 second_half; - - /* all descs must match except for in addr, length and eop */ - second_half = txd->vals8[1]; - - for (f = 0; f < nr_frags; f++) { - frag = &skb_shinfo(skb)->frags[f]; - fsize = skb_frag_size(frag); - - dma_addr = skb_frag_dma_map(dp->dev, frag, 0, - fsize, DMA_TO_DEVICE); - if (dma_mapping_error(dp->dev, dma_addr)) - goto err_unmap; - - wr_idx = D_IDX(tx_ring, wr_idx + 1); - tx_ring->txbufs[wr_idx].skb = skb; - tx_ring->txbufs[wr_idx].dma_addr = dma_addr; - tx_ring->txbufs[wr_idx].fidx = f; - - txd = &tx_ring->txds[wr_idx]; - txd->dma_len = cpu_to_le16(fsize); - nfp_desc_set_dma_addr(txd, dma_addr); - txd->offset_eop = md_bytes | - ((f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0); - txd->vals8[1] = second_half; - } - - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_gather++; - u64_stats_update_end(&r_vec->tx_sync); - } - - skb_tx_timestamp(skb); - - nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); - - tx_ring->wr_p += nr_frags + 1; - if (nfp_net_tx_ring_should_stop(tx_ring)) - nfp_net_tx_ring_stop(nd_q, tx_ring); - - tx_ring->wr_ptr_add += nr_frags + 1; - if (__netdev_tx_sent_queue(nd_q, txbuf->real_len, netdev_xmit_more())) - nfp_net_tx_xmit_more_flush(tx_ring); - - return NETDEV_TX_OK; - -err_unmap: - while (--f >= 0) { - frag = &skb_shinfo(skb)->frags[f]; - dma_unmap_page(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, - skb_frag_size(frag), DMA_TO_DEVICE); - tx_ring->txbufs[wr_idx].skb = NULL; - tx_ring->txbufs[wr_idx].dma_addr = 0; - tx_ring->txbufs[wr_idx].fidx = -2; - wr_idx = wr_idx - 1; - if (wr_idx < 0) - wr_idx += tx_ring->cnt; - } - dma_unmap_single(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, - skb_headlen(skb), DMA_TO_DEVICE); - tx_ring->txbufs[wr_idx].skb = NULL; - tx_ring->txbufs[wr_idx].dma_addr = 0; - tx_ring->txbufs[wr_idx].fidx = -2; -err_dma_err: - nn_dp_warn(dp, "Failed to map DMA TX buffer\n"); -err_flush: - nfp_net_tx_xmit_more_flush(tx_ring); - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_errors++; - u64_stats_update_end(&r_vec->tx_sync); - nfp_net_tls_tx_undo(skb, tls_handle); - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; -} - -/** - * nfp_net_tx_complete() - Handled completed TX packets - * @tx_ring: TX ring structure - * @budget: NAPI budget (only used as bool to determine if in NAPI context) - */ -static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring, int budget) -{ - struct nfp_net_r_vector *r_vec = tx_ring->r_vec; - struct nfp_net_dp *dp = &r_vec->nfp_net->dp; - struct netdev_queue *nd_q; - u32 done_pkts = 0, done_bytes = 0; - u32 qcp_rd_p; - int todo; - - if (tx_ring->wr_p == tx_ring->rd_p) - return; - - /* Work out how many descriptors have been transmitted */ - qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); - - if (qcp_rd_p == tx_ring->qcp_rd_p) - return; - - todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); - - while (todo--) { - const skb_frag_t *frag; - struct nfp_net_tx_buf *tx_buf; - struct sk_buff *skb; - int fidx, nr_frags; - int idx; - - idx = D_IDX(tx_ring, tx_ring->rd_p++); - tx_buf = &tx_ring->txbufs[idx]; - - skb = tx_buf->skb; - if (!skb) - continue; - - nr_frags = skb_shinfo(skb)->nr_frags; - fidx = tx_buf->fidx; - - if (fidx == -1) { - /* unmap head */ - dma_unmap_single(dp->dev, tx_buf->dma_addr, - skb_headlen(skb), DMA_TO_DEVICE); - - done_pkts += tx_buf->pkt_cnt; - done_bytes += tx_buf->real_len; - } else { - /* unmap fragment */ - frag = &skb_shinfo(skb)->frags[fidx]; - dma_unmap_page(dp->dev, tx_buf->dma_addr, - skb_frag_size(frag), DMA_TO_DEVICE); - } - - /* check for last gather fragment */ - if (fidx == nr_frags - 1) - napi_consume_skb(skb, budget); - - tx_buf->dma_addr = 0; - tx_buf->skb = NULL; - tx_buf->fidx = -2; - } - - tx_ring->qcp_rd_p = qcp_rd_p; - - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_bytes += done_bytes; - r_vec->tx_pkts += done_pkts; - u64_stats_update_end(&r_vec->tx_sync); - - if (!dp->netdev) - return; - - nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); - netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); - if (nfp_net_tx_ring_should_wake(tx_ring)) { - /* Make sure TX thread will see updated tx_ring->rd_p */ - smp_mb(); - - if (unlikely(netif_tx_queue_stopped(nd_q))) - netif_tx_wake_queue(nd_q); - } - - WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, - "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", - tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); -} - -static bool nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring) -{ - struct nfp_net_r_vector *r_vec = tx_ring->r_vec; - u32 done_pkts = 0, done_bytes = 0; - bool done_all; - int idx, todo; - u32 qcp_rd_p; - - /* Work out how many descriptors have been transmitted */ - qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); - - if (qcp_rd_p == tx_ring->qcp_rd_p) - return true; - - todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); - - done_all = todo <= NFP_NET_XDP_MAX_COMPLETE; - todo = min(todo, NFP_NET_XDP_MAX_COMPLETE); - - tx_ring->qcp_rd_p = D_IDX(tx_ring, tx_ring->qcp_rd_p + todo); - - done_pkts = todo; - while (todo--) { - idx = D_IDX(tx_ring, tx_ring->rd_p); - tx_ring->rd_p++; - - done_bytes += tx_ring->txbufs[idx].real_len; - } - - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_bytes += done_bytes; - r_vec->tx_pkts += done_pkts; - u64_stats_update_end(&r_vec->tx_sync); - - WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, - "XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", - tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); - - return done_all; -} - -/** - * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers - * @dp: NFP Net data path struct - * @tx_ring: TX ring structure - * - * Assumes that the device is stopped, must be idempotent. - */ -static void -nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) -{ - const skb_frag_t *frag; - struct netdev_queue *nd_q; - - while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) { - struct nfp_net_tx_buf *tx_buf; - struct sk_buff *skb; - int idx, nr_frags; - - idx = D_IDX(tx_ring, tx_ring->rd_p); - tx_buf = &tx_ring->txbufs[idx]; - - skb = tx_ring->txbufs[idx].skb; - nr_frags = skb_shinfo(skb)->nr_frags; - - if (tx_buf->fidx == -1) { - /* unmap head */ - dma_unmap_single(dp->dev, tx_buf->dma_addr, - skb_headlen(skb), DMA_TO_DEVICE); - } else { - /* unmap fragment */ - frag = &skb_shinfo(skb)->frags[tx_buf->fidx]; - dma_unmap_page(dp->dev, tx_buf->dma_addr, - skb_frag_size(frag), DMA_TO_DEVICE); - } - - /* check for last gather fragment */ - if (tx_buf->fidx == nr_frags - 1) - dev_kfree_skb_any(skb); - - tx_buf->dma_addr = 0; - tx_buf->skb = NULL; - tx_buf->fidx = -2; - - tx_ring->qcp_rd_p++; - tx_ring->rd_p++; - } - - memset(tx_ring->txds, 0, tx_ring->size); - tx_ring->wr_p = 0; - tx_ring->rd_p = 0; - tx_ring->qcp_rd_p = 0; - tx_ring->wr_ptr_add = 0; - - if (tx_ring->is_xdp || !dp->netdev) - return; - - nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); - netdev_tx_reset_queue(nd_q); -} - static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) { struct nfp_net *nn = netdev_priv(netdev); @@ -1335,1008 +687,43 @@ static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue); } -/* Receive processing - */ +/* Receive processing */ static unsigned int -nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp) +nfp_net_calc_fl_bufsz_data(struct nfp_net_dp *dp) { - unsigned int fl_bufsz; + unsigned int fl_bufsz = 0; - fl_bufsz = NFP_NET_RX_BUF_HEADROOM; - fl_bufsz += dp->rx_dma_off; if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) fl_bufsz += NFP_NET_MAX_PREPEND; else fl_bufsz += dp->rx_offset; fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu; - fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); - fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); - return fl_bufsz; } -static void -nfp_net_free_frag(void *frag, bool xdp) -{ - if (!xdp) - skb_free_frag(frag); - else - __free_page(virt_to_page(frag)); -} - -/** - * nfp_net_rx_alloc_one() - Allocate and map page frag for RX - * @dp: NFP Net data path struct - * @dma_addr: Pointer to storage for DMA address (output param) - * - * This function will allcate a new page frag, map it for DMA. - * - * Return: allocated page frag or NULL on failure. - */ -static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) -{ - void *frag; - - if (!dp->xdp_prog) { - frag = netdev_alloc_frag(dp->fl_bufsz); - } else { - struct page *page; - - page = alloc_page(GFP_KERNEL); - frag = page ? page_address(page) : NULL; - } - if (!frag) { - nn_dp_warn(dp, "Failed to alloc receive page frag\n"); - return NULL; - } - - *dma_addr = nfp_net_dma_map_rx(dp, frag); - if (dma_mapping_error(dp->dev, *dma_addr)) { - nfp_net_free_frag(frag, dp->xdp_prog); - nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); - return NULL; - } - - return frag; -} - -static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) -{ - void *frag; - - if (!dp->xdp_prog) { - frag = napi_alloc_frag(dp->fl_bufsz); - if (unlikely(!frag)) - return NULL; - } else { - struct page *page; - - page = dev_alloc_page(); - if (unlikely(!page)) - return NULL; - frag = page_address(page); - } - - *dma_addr = nfp_net_dma_map_rx(dp, frag); - if (dma_mapping_error(dp->dev, *dma_addr)) { - nfp_net_free_frag(frag, dp->xdp_prog); - nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); - return NULL; - } - - return frag; -} - -/** - * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings - * @dp: NFP Net data path struct - * @rx_ring: RX ring structure - * @frag: page fragment buffer - * @dma_addr: DMA address of skb mapping - */ -static void nfp_net_rx_give_one(const struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring, - void *frag, dma_addr_t dma_addr) -{ - unsigned int wr_idx; - - wr_idx = D_IDX(rx_ring, rx_ring->wr_p); - - nfp_net_dma_sync_dev_rx(dp, dma_addr); - - /* Stash SKB and DMA address away */ - rx_ring->rxbufs[wr_idx].frag = frag; - rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; - - /* Fill freelist descriptor */ - rx_ring->rxds[wr_idx].fld.reserved = 0; - rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; - nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, - dma_addr + dp->rx_dma_off); - - rx_ring->wr_p++; - if (!(rx_ring->wr_p % NFP_NET_FL_BATCH)) { - /* Update write pointer of the freelist queue. Make - * sure all writes are flushed before telling the hardware. - */ - wmb(); - nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, NFP_NET_FL_BATCH); - } -} - -/** - * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable - * @rx_ring: RX ring structure - * - * Assumes that the device is stopped, must be idempotent. - */ -static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) -{ - unsigned int wr_idx, last_idx; - - /* wr_p == rd_p means ring was never fed FL bufs. RX rings are always - * kept at cnt - 1 FL bufs. - */ - if (rx_ring->wr_p == 0 && rx_ring->rd_p == 0) - return; - - /* Move the empty entry to the end of the list */ - wr_idx = D_IDX(rx_ring, rx_ring->wr_p); - last_idx = rx_ring->cnt - 1; - rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; - rx_ring->rxbufs[wr_idx].frag = rx_ring->rxbufs[last_idx].frag; - rx_ring->rxbufs[last_idx].dma_addr = 0; - rx_ring->rxbufs[last_idx].frag = NULL; - - memset(rx_ring->rxds, 0, rx_ring->size); - rx_ring->wr_p = 0; - rx_ring->rd_p = 0; -} - -/** - * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring - * @dp: NFP Net data path struct - * @rx_ring: RX ring to remove buffers from - * - * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) - * entries. After device is disabled nfp_net_rx_ring_reset() must be called - * to restore required ring geometry. - */ -static void -nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring) -{ - unsigned int i; - - for (i = 0; i < rx_ring->cnt - 1; i++) { - /* NULL skb can only happen when initial filling of the ring - * fails to allocate enough buffers and calls here to free - * already allocated ones. - */ - if (!rx_ring->rxbufs[i].frag) - continue; - - nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr); - nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog); - rx_ring->rxbufs[i].dma_addr = 0; - rx_ring->rxbufs[i].frag = NULL; - } -} - -/** - * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) - * @dp: NFP Net data path struct - * @rx_ring: RX ring to remove buffers from - */ -static int -nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring) -{ - struct nfp_net_rx_buf *rxbufs; - unsigned int i; - - rxbufs = rx_ring->rxbufs; - - for (i = 0; i < rx_ring->cnt - 1; i++) { - rxbufs[i].frag = nfp_net_rx_alloc_one(dp, &rxbufs[i].dma_addr); - if (!rxbufs[i].frag) { - nfp_net_rx_ring_bufs_free(dp, rx_ring); - return -ENOMEM; - } - } - - return 0; -} - -/** - * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW - * @dp: NFP Net data path struct - * @rx_ring: RX ring to fill - */ -static void -nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp, - struct nfp_net_rx_ring *rx_ring) -{ - unsigned int i; - - for (i = 0; i < rx_ring->cnt - 1; i++) - nfp_net_rx_give_one(dp, rx_ring, rx_ring->rxbufs[i].frag, - rx_ring->rxbufs[i].dma_addr); -} - -/** - * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors - * @flags: RX descriptor flags field in CPU byte order - */ -static int nfp_net_rx_csum_has_errors(u16 flags) -{ - u16 csum_all_checked, csum_all_ok; - - csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; - csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; - - return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); -} - -/** - * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags - * @dp: NFP Net data path struct - * @r_vec: per-ring structure - * @rxd: Pointer to RX descriptor - * @meta: Parsed metadata prepend - * @skb: Pointer to SKB - */ -static void nfp_net_rx_csum(struct nfp_net_dp *dp, - struct nfp_net_r_vector *r_vec, - struct nfp_net_rx_desc *rxd, - struct nfp_meta_parsed *meta, struct sk_buff *skb) -{ - skb_checksum_none_assert(skb); - - if (!(dp->netdev->features & NETIF_F_RXCSUM)) - return; - - if (meta->csum_type) { - skb->ip_summed = meta->csum_type; - skb->csum = meta->csum; - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->hw_csum_rx_complete++; - u64_stats_update_end(&r_vec->rx_sync); - return; - } - - if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->hw_csum_rx_error++; - u64_stats_update_end(&r_vec->rx_sync); - return; - } - - /* Assume that the firmware will never report inner CSUM_OK unless outer - * L4 headers were successfully parsed. FW will always report zero UDP - * checksum as CSUM_OK. - */ - if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || - rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { - __skb_incr_checksum_unnecessary(skb); - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->hw_csum_rx_ok++; - u64_stats_update_end(&r_vec->rx_sync); - } - - if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || - rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { - __skb_incr_checksum_unnecessary(skb); - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->hw_csum_rx_inner_ok++; - u64_stats_update_end(&r_vec->rx_sync); - } -} - -static void -nfp_net_set_hash(struct net_device *netdev, struct nfp_meta_parsed *meta, - unsigned int type, __be32 *hash) -{ - if (!(netdev->features & NETIF_F_RXHASH)) - return; - - switch (type) { - case NFP_NET_RSS_IPV4: - case NFP_NET_RSS_IPV6: - case NFP_NET_RSS_IPV6_EX: - meta->hash_type = PKT_HASH_TYPE_L3; - break; - default: - meta->hash_type = PKT_HASH_TYPE_L4; - break; - } - - meta->hash = get_unaligned_be32(hash); -} - -static void -nfp_net_set_hash_desc(struct net_device *netdev, struct nfp_meta_parsed *meta, - void *data, struct nfp_net_rx_desc *rxd) -{ - struct nfp_net_rx_hash *rx_hash = data; - - if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) - return; - - nfp_net_set_hash(netdev, meta, get_unaligned_be32(&rx_hash->hash_type), - &rx_hash->hash); -} - -static bool -nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta, - void *data, void *pkt, unsigned int pkt_len, int meta_len) -{ - u32 meta_info; - - meta_info = get_unaligned_be32(data); - data += 4; - - while (meta_info) { - switch (meta_info & NFP_NET_META_FIELD_MASK) { - case NFP_NET_META_HASH: - meta_info >>= NFP_NET_META_FIELD_SIZE; - nfp_net_set_hash(netdev, meta, - meta_info & NFP_NET_META_FIELD_MASK, - (__be32 *)data); - data += 4; - break; - case NFP_NET_META_MARK: - meta->mark = get_unaligned_be32(data); - data += 4; - break; - case NFP_NET_META_PORTID: - meta->portid = get_unaligned_be32(data); - data += 4; - break; - case NFP_NET_META_CSUM: - meta->csum_type = CHECKSUM_COMPLETE; - meta->csum = - (__force __wsum)__get_unaligned_cpu32(data); - data += 4; - break; - case NFP_NET_META_RESYNC_INFO: - if (nfp_net_tls_rx_resync_req(netdev, data, pkt, - pkt_len)) - return false; - data += sizeof(struct nfp_net_tls_resync_req); - break; - default: - return true; - } - - meta_info >>= NFP_NET_META_FIELD_SIZE; - } - - return data != pkt; -} - -static void -nfp_net_rx_drop(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, - struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf, - struct sk_buff *skb) -{ - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->rx_drops++; - /* If we have both skb and rxbuf the replacement buffer allocation - * must have failed, count this as an alloc failure. - */ - if (skb && rxbuf) - r_vec->rx_replace_buf_alloc_fail++; - u64_stats_update_end(&r_vec->rx_sync); - - /* skb is build based on the frag, free_skb() would free the frag - * so to be able to reuse it we need an extra ref. - */ - if (skb && rxbuf && skb->head == rxbuf->frag) - page_ref_inc(virt_to_head_page(rxbuf->frag)); - if (rxbuf) - nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, rxbuf->dma_addr); - if (skb) - dev_kfree_skb_any(skb); -} - -static bool -nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, - struct nfp_net_tx_ring *tx_ring, - struct nfp_net_rx_buf *rxbuf, unsigned int dma_off, - unsigned int pkt_len, bool *completed) -{ - unsigned int dma_map_sz = dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA; - struct nfp_net_tx_buf *txbuf; - struct nfp_net_tx_desc *txd; - int wr_idx; - - /* Reject if xdp_adjust_tail grow packet beyond DMA area */ - if (pkt_len + dma_off > dma_map_sz) - return false; - - if (unlikely(nfp_net_tx_full(tx_ring, 1))) { - if (!*completed) { - nfp_net_xdp_complete(tx_ring); - *completed = true; - } - - if (unlikely(nfp_net_tx_full(tx_ring, 1))) { - nfp_net_rx_drop(dp, rx_ring->r_vec, rx_ring, rxbuf, - NULL); - return false; - } - } - - wr_idx = D_IDX(tx_ring, tx_ring->wr_p); - - /* Stash the soft descriptor of the head then initialize it */ - txbuf = &tx_ring->txbufs[wr_idx]; - - nfp_net_rx_give_one(dp, rx_ring, txbuf->frag, txbuf->dma_addr); - - txbuf->frag = rxbuf->frag; - txbuf->dma_addr = rxbuf->dma_addr; - txbuf->fidx = -1; - txbuf->pkt_cnt = 1; - txbuf->real_len = pkt_len; - - dma_sync_single_for_device(dp->dev, rxbuf->dma_addr + dma_off, - pkt_len, DMA_BIDIRECTIONAL); - - /* Build TX descriptor */ - txd = &tx_ring->txds[wr_idx]; - txd->offset_eop = PCIE_DESC_TX_EOP; - txd->dma_len = cpu_to_le16(pkt_len); - nfp_desc_set_dma_addr(txd, rxbuf->dma_addr + dma_off); - txd->data_len = cpu_to_le16(pkt_len); - - txd->flags = 0; - txd->mss = 0; - txd->lso_hdrlen = 0; - - tx_ring->wr_p++; - tx_ring->wr_ptr_add++; - return true; -} - -/** - * nfp_net_rx() - receive up to @budget packets on @rx_ring - * @rx_ring: RX ring to receive from - * @budget: NAPI budget - * - * Note, this function is separated out from the napi poll function to - * more cleanly separate packet receive code from other bookkeeping - * functions performed in the napi poll function. - * - * Return: Number of packets received. - */ -static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) -{ - struct nfp_net_r_vector *r_vec = rx_ring->r_vec; - struct nfp_net_dp *dp = &r_vec->nfp_net->dp; - struct nfp_net_tx_ring *tx_ring; - struct bpf_prog *xdp_prog; - bool xdp_tx_cmpl = false; - unsigned int true_bufsz; - struct sk_buff *skb; - int pkts_polled = 0; - struct xdp_buff xdp; - int idx; - - xdp_prog = READ_ONCE(dp->xdp_prog); - true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; - xdp_init_buff(&xdp, PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM, - &rx_ring->xdp_rxq); - tx_ring = r_vec->xdp_ring; - - while (pkts_polled < budget) { - unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; - struct nfp_net_rx_buf *rxbuf; - struct nfp_net_rx_desc *rxd; - struct nfp_meta_parsed meta; - bool redir_egress = false; - struct net_device *netdev; - dma_addr_t new_dma_addr; - u32 meta_len_xdp = 0; - void *new_frag; - - idx = D_IDX(rx_ring, rx_ring->rd_p); - - rxd = &rx_ring->rxds[idx]; - if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) - break; - - /* Memory barrier to ensure that we won't do other reads - * before the DD bit. - */ - dma_rmb(); - - memset(&meta, 0, sizeof(meta)); - - rx_ring->rd_p++; - pkts_polled++; - - rxbuf = &rx_ring->rxbufs[idx]; - /* < meta_len > - * <-- [rx_offset] --> - * --------------------------------------------------------- - * | [XX] | metadata | packet | XXXX | - * --------------------------------------------------------- - * <---------------- data_len ---------------> - * - * The rx_offset is fixed for all packets, the meta_len can vary - * on a packet by packet basis. If rx_offset is set to zero - * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the - * buffer and is immediately followed by the packet (no [XX]). - */ - meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; - data_len = le16_to_cpu(rxd->rxd.data_len); - pkt_len = data_len - meta_len; - - pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; - if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) - pkt_off += meta_len; - else - pkt_off += dp->rx_offset; - meta_off = pkt_off - meta_len; - - /* Stats update */ - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->rx_pkts++; - r_vec->rx_bytes += pkt_len; - u64_stats_update_end(&r_vec->rx_sync); - - if (unlikely(meta_len > NFP_NET_MAX_PREPEND || - (dp->rx_offset && meta_len > dp->rx_offset))) { - nn_dp_warn(dp, "oversized RX packet metadata %u\n", - meta_len); - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); - continue; - } - - nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, - data_len); - - if (!dp->chained_metadata_format) { - nfp_net_set_hash_desc(dp->netdev, &meta, - rxbuf->frag + meta_off, rxd); - } else if (meta_len) { - if (unlikely(nfp_net_parse_meta(dp->netdev, &meta, - rxbuf->frag + meta_off, - rxbuf->frag + pkt_off, - pkt_len, meta_len))) { - nn_dp_warn(dp, "invalid RX packet metadata\n"); - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, - NULL); - continue; - } - } - - if (xdp_prog && !meta.portid) { - void *orig_data = rxbuf->frag + pkt_off; - unsigned int dma_off; - int act; - - xdp_prepare_buff(&xdp, - rxbuf->frag + NFP_NET_RX_BUF_HEADROOM, - pkt_off - NFP_NET_RX_BUF_HEADROOM, - pkt_len, true); - - act = bpf_prog_run_xdp(xdp_prog, &xdp); - - pkt_len = xdp.data_end - xdp.data; - pkt_off += xdp.data - orig_data; - - switch (act) { - case XDP_PASS: - meta_len_xdp = xdp.data - xdp.data_meta; - break; - case XDP_TX: - dma_off = pkt_off - NFP_NET_RX_BUF_HEADROOM; - if (unlikely(!nfp_net_tx_xdp_buf(dp, rx_ring, - tx_ring, rxbuf, - dma_off, - pkt_len, - &xdp_tx_cmpl))) - trace_xdp_exception(dp->netdev, - xdp_prog, act); - continue; - default: - bpf_warn_invalid_xdp_action(act); - fallthrough; - case XDP_ABORTED: - trace_xdp_exception(dp->netdev, xdp_prog, act); - fallthrough; - case XDP_DROP: - nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, - rxbuf->dma_addr); - continue; - } - } - - if (likely(!meta.portid)) { - netdev = dp->netdev; - } else if (meta.portid == NFP_META_PORT_ID_CTRL) { - struct nfp_net *nn = netdev_priv(dp->netdev); - - nfp_app_ctrl_rx_raw(nn->app, rxbuf->frag + pkt_off, - pkt_len); - nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, - rxbuf->dma_addr); - continue; - } else { - struct nfp_net *nn; - - nn = netdev_priv(dp->netdev); - netdev = nfp_app_dev_get(nn->app, meta.portid, - &redir_egress); - if (unlikely(!netdev)) { - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, - NULL); - continue; - } - - if (nfp_netdev_is_nfp_repr(netdev)) - nfp_repr_inc_rx_stats(netdev, pkt_len); - } - - skb = build_skb(rxbuf->frag, true_bufsz); - if (unlikely(!skb)) { - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); - continue; - } - new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); - if (unlikely(!new_frag)) { - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); - continue; - } - - nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); - - nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); - - skb_reserve(skb, pkt_off); - skb_put(skb, pkt_len); - - skb->mark = meta.mark; - skb_set_hash(skb, meta.hash, meta.hash_type); - - skb_record_rx_queue(skb, rx_ring->idx); - skb->protocol = eth_type_trans(skb, netdev); - - nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb); - -#ifdef CONFIG_TLS_DEVICE - if (rxd->rxd.flags & PCIE_DESC_RX_DECRYPTED) { - skb->decrypted = true; - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->hw_tls_rx++; - u64_stats_update_end(&r_vec->rx_sync); - } -#endif - - if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) - __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), - le16_to_cpu(rxd->rxd.vlan)); - if (meta_len_xdp) - skb_metadata_set(skb, meta_len_xdp); - - if (likely(!redir_egress)) { - napi_gro_receive(&rx_ring->r_vec->napi, skb); - } else { - skb->dev = netdev; - skb_reset_network_header(skb); - __skb_push(skb, ETH_HLEN); - dev_queue_xmit(skb); - } - } - - if (xdp_prog) { - if (tx_ring->wr_ptr_add) - nfp_net_tx_xmit_more_flush(tx_ring); - else if (unlikely(tx_ring->wr_p != tx_ring->rd_p) && - !xdp_tx_cmpl) - if (!nfp_net_xdp_complete(tx_ring)) - pkts_polled = budget; - } - - return pkts_polled; -} - -/** - * nfp_net_poll() - napi poll function - * @napi: NAPI structure - * @budget: NAPI budget - * - * Return: number of packets polled. - */ -static int nfp_net_poll(struct napi_struct *napi, int budget) -{ - struct nfp_net_r_vector *r_vec = - container_of(napi, struct nfp_net_r_vector, napi); - unsigned int pkts_polled = 0; - - if (r_vec->tx_ring) - nfp_net_tx_complete(r_vec->tx_ring, budget); - if (r_vec->rx_ring) - pkts_polled = nfp_net_rx(r_vec->rx_ring, budget); - - if (pkts_polled < budget) - if (napi_complete_done(napi, pkts_polled)) - nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); - - if (r_vec->nfp_net->rx_coalesce_adapt_on && r_vec->rx_ring) { - struct dim_sample dim_sample = {}; - unsigned int start; - u64 pkts, bytes; - - do { - start = u64_stats_fetch_begin(&r_vec->rx_sync); - pkts = r_vec->rx_pkts; - bytes = r_vec->rx_bytes; - } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); - - dim_update_sample(r_vec->event_ctr, pkts, bytes, &dim_sample); - net_dim(&r_vec->rx_dim, dim_sample); - } - - if (r_vec->nfp_net->tx_coalesce_adapt_on && r_vec->tx_ring) { - struct dim_sample dim_sample = {}; - unsigned int start; - u64 pkts, bytes; - - do { - start = u64_stats_fetch_begin(&r_vec->tx_sync); - pkts = r_vec->tx_pkts; - bytes = r_vec->tx_bytes; - } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); - - dim_update_sample(r_vec->event_ctr, pkts, bytes, &dim_sample); - net_dim(&r_vec->tx_dim, dim_sample); - } - - return pkts_polled; -} - -/* Control device data path - */ - -static bool -nfp_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, - struct sk_buff *skb, bool old) -{ - unsigned int real_len = skb->len, meta_len = 0; - struct nfp_net_tx_ring *tx_ring; - struct nfp_net_tx_buf *txbuf; - struct nfp_net_tx_desc *txd; - struct nfp_net_dp *dp; - dma_addr_t dma_addr; - int wr_idx; - - dp = &r_vec->nfp_net->dp; - tx_ring = r_vec->tx_ring; - - if (WARN_ON_ONCE(skb_shinfo(skb)->nr_frags)) { - nn_dp_warn(dp, "Driver's CTRL TX does not implement gather\n"); - goto err_free; - } - - if (unlikely(nfp_net_tx_full(tx_ring, 1))) { - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_busy++; - u64_stats_update_end(&r_vec->tx_sync); - if (!old) - __skb_queue_tail(&r_vec->queue, skb); - else - __skb_queue_head(&r_vec->queue, skb); - return true; - } - - if (nfp_app_ctrl_has_meta(nn->app)) { - if (unlikely(skb_headroom(skb) < 8)) { - nn_dp_warn(dp, "CTRL TX on skb without headroom\n"); - goto err_free; - } - meta_len = 8; - put_unaligned_be32(NFP_META_PORT_ID_CTRL, skb_push(skb, 4)); - put_unaligned_be32(NFP_NET_META_PORTID, skb_push(skb, 4)); - } - - /* Start with the head skbuf */ - dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), - DMA_TO_DEVICE); - if (dma_mapping_error(dp->dev, dma_addr)) - goto err_dma_warn; - - wr_idx = D_IDX(tx_ring, tx_ring->wr_p); - - /* Stash the soft descriptor of the head then initialize it */ - txbuf = &tx_ring->txbufs[wr_idx]; - txbuf->skb = skb; - txbuf->dma_addr = dma_addr; - txbuf->fidx = -1; - txbuf->pkt_cnt = 1; - txbuf->real_len = real_len; - - /* Build TX descriptor */ - txd = &tx_ring->txds[wr_idx]; - txd->offset_eop = meta_len | PCIE_DESC_TX_EOP; - txd->dma_len = cpu_to_le16(skb_headlen(skb)); - nfp_desc_set_dma_addr(txd, dma_addr); - txd->data_len = cpu_to_le16(skb->len); - - txd->flags = 0; - txd->mss = 0; - txd->lso_hdrlen = 0; - - tx_ring->wr_p++; - tx_ring->wr_ptr_add++; - nfp_net_tx_xmit_more_flush(tx_ring); - - return false; - -err_dma_warn: - nn_dp_warn(dp, "Failed to DMA map TX CTRL buffer\n"); -err_free: - u64_stats_update_begin(&r_vec->tx_sync); - r_vec->tx_errors++; - u64_stats_update_end(&r_vec->tx_sync); - dev_kfree_skb_any(skb); - return false; -} - -bool __nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb) -{ - struct nfp_net_r_vector *r_vec = &nn->r_vecs[0]; - - return nfp_ctrl_tx_one(nn, r_vec, skb, false); -} - -bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb) -{ - struct nfp_net_r_vector *r_vec = &nn->r_vecs[0]; - bool ret; - - spin_lock_bh(&r_vec->lock); - ret = nfp_ctrl_tx_one(nn, r_vec, skb, false); - spin_unlock_bh(&r_vec->lock); - - return ret; -} - -static void __nfp_ctrl_tx_queued(struct nfp_net_r_vector *r_vec) +static unsigned int nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp) { - struct sk_buff *skb; - - while ((skb = __skb_dequeue(&r_vec->queue))) - if (nfp_ctrl_tx_one(r_vec->nfp_net, r_vec, skb, true)) - return; -} - -static bool -nfp_ctrl_meta_ok(struct nfp_net *nn, void *data, unsigned int meta_len) -{ - u32 meta_type, meta_tag; - - if (!nfp_app_ctrl_has_meta(nn->app)) - return !meta_len; - - if (meta_len != 8) - return false; - - meta_type = get_unaligned_be32(data); - meta_tag = get_unaligned_be32(data + 4); - - return (meta_type == NFP_NET_META_PORTID && - meta_tag == NFP_META_PORT_ID_CTRL); -} - -static bool -nfp_ctrl_rx_one(struct nfp_net *nn, struct nfp_net_dp *dp, - struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring) -{ - unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; - struct nfp_net_rx_buf *rxbuf; - struct nfp_net_rx_desc *rxd; - dma_addr_t new_dma_addr; - struct sk_buff *skb; - void *new_frag; - int idx; - - idx = D_IDX(rx_ring, rx_ring->rd_p); - - rxd = &rx_ring->rxds[idx]; - if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) - return false; - - /* Memory barrier to ensure that we won't do other reads - * before the DD bit. - */ - dma_rmb(); - - rx_ring->rd_p++; - - rxbuf = &rx_ring->rxbufs[idx]; - meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; - data_len = le16_to_cpu(rxd->rxd.data_len); - pkt_len = data_len - meta_len; - - pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; - if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) - pkt_off += meta_len; - else - pkt_off += dp->rx_offset; - meta_off = pkt_off - meta_len; - - /* Stats update */ - u64_stats_update_begin(&r_vec->rx_sync); - r_vec->rx_pkts++; - r_vec->rx_bytes += pkt_len; - u64_stats_update_end(&r_vec->rx_sync); - - nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, data_len); - - if (unlikely(!nfp_ctrl_meta_ok(nn, rxbuf->frag + meta_off, meta_len))) { - nn_dp_warn(dp, "incorrect metadata for ctrl packet (%d)\n", - meta_len); - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); - return true; - } - - skb = build_skb(rxbuf->frag, dp->fl_bufsz); - if (unlikely(!skb)) { - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); - return true; - } - new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); - if (unlikely(!new_frag)) { - nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); - return true; - } - - nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); - - nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); - - skb_reserve(skb, pkt_off); - skb_put(skb, pkt_len); - - nfp_app_ctrl_rx(nn->app, skb); - - return true; -} + unsigned int fl_bufsz; -static bool nfp_ctrl_rx(struct nfp_net_r_vector *r_vec) -{ - struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; - struct nfp_net *nn = r_vec->nfp_net; - struct nfp_net_dp *dp = &nn->dp; - unsigned int budget = 512; + fl_bufsz = NFP_NET_RX_BUF_HEADROOM; + fl_bufsz += dp->rx_dma_off; + fl_bufsz += nfp_net_calc_fl_bufsz_data(dp); - while (nfp_ctrl_rx_one(nn, dp, r_vec, rx_ring) && budget--) - continue; + fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); + fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); - return budget; + return fl_bufsz; } -static void nfp_ctrl_poll(struct tasklet_struct *t) +static unsigned int nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp *dp) { - struct nfp_net_r_vector *r_vec = from_tasklet(r_vec, t, tasklet); + unsigned int fl_bufsz; - spin_lock(&r_vec->lock); - nfp_net_tx_complete(r_vec->tx_ring, 0); - __nfp_ctrl_tx_queued(r_vec); - spin_unlock(&r_vec->lock); + fl_bufsz = XDP_PACKET_HEADROOM; + fl_bufsz += nfp_net_calc_fl_bufsz_data(dp); - if (nfp_ctrl_rx(r_vec)) { - nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); - } else { - tasklet_schedule(&r_vec->tasklet); - nn_dp_warn(&r_vec->nfp_net->dp, - "control message budget exceeded!\n"); - } + return fl_bufsz; } /* Setup and Configuration @@ -2371,7 +758,7 @@ static void nfp_net_vecs_init(struct nfp_net *nn) __skb_queue_head_init(&r_vec->queue); spin_lock_init(&r_vec->lock); - tasklet_setup(&r_vec->tasklet, nfp_ctrl_poll); + tasklet_setup(&r_vec->tasklet, nn->dp.ops->ctrl_poll); tasklet_disable(&r_vec->tasklet); } @@ -2379,263 +766,23 @@ static void nfp_net_vecs_init(struct nfp_net *nn) } } -/** - * nfp_net_tx_ring_free() - Free resources allocated to a TX ring - * @tx_ring: TX ring to free - */ -static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) -{ - struct nfp_net_r_vector *r_vec = tx_ring->r_vec; - struct nfp_net_dp *dp = &r_vec->nfp_net->dp; - - kvfree(tx_ring->txbufs); - - if (tx_ring->txds) - dma_free_coherent(dp->dev, tx_ring->size, - tx_ring->txds, tx_ring->dma); - - tx_ring->cnt = 0; - tx_ring->txbufs = NULL; - tx_ring->txds = NULL; - tx_ring->dma = 0; - tx_ring->size = 0; -} - -/** - * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring - * @dp: NFP Net data path struct - * @tx_ring: TX Ring structure to allocate - * - * Return: 0 on success, negative errno otherwise. - */ -static int -nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) -{ - struct nfp_net_r_vector *r_vec = tx_ring->r_vec; - - tx_ring->cnt = dp->txd_cnt; - - tx_ring->size = array_size(tx_ring->cnt, sizeof(*tx_ring->txds)); - tx_ring->txds = dma_alloc_coherent(dp->dev, tx_ring->size, - &tx_ring->dma, - GFP_KERNEL | __GFP_NOWARN); - if (!tx_ring->txds) { - netdev_warn(dp->netdev, "failed to allocate TX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n", - tx_ring->cnt); - goto err_alloc; - } - - tx_ring->txbufs = kvcalloc(tx_ring->cnt, sizeof(*tx_ring->txbufs), - GFP_KERNEL); - if (!tx_ring->txbufs) - goto err_alloc; - - if (!tx_ring->is_xdp && dp->netdev) - netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask, - tx_ring->idx); - - return 0; - -err_alloc: - nfp_net_tx_ring_free(tx_ring); - return -ENOMEM; -} - static void -nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp, - struct nfp_net_tx_ring *tx_ring) -{ - unsigned int i; - - if (!tx_ring->is_xdp) - return; - - for (i = 0; i < tx_ring->cnt; i++) { - if (!tx_ring->txbufs[i].frag) - return; - - nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[i].dma_addr); - __free_page(virt_to_page(tx_ring->txbufs[i].frag)); - } -} - -static int -nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp, - struct nfp_net_tx_ring *tx_ring) -{ - struct nfp_net_tx_buf *txbufs = tx_ring->txbufs; - unsigned int i; - - if (!tx_ring->is_xdp) - return 0; - - for (i = 0; i < tx_ring->cnt; i++) { - txbufs[i].frag = nfp_net_rx_alloc_one(dp, &txbufs[i].dma_addr); - if (!txbufs[i].frag) { - nfp_net_tx_ring_bufs_free(dp, tx_ring); - return -ENOMEM; - } - } - - return 0; -} - -static int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) -{ - unsigned int r; - - dp->tx_rings = kcalloc(dp->num_tx_rings, sizeof(*dp->tx_rings), - GFP_KERNEL); - if (!dp->tx_rings) - return -ENOMEM; - - for (r = 0; r < dp->num_tx_rings; r++) { - int bias = 0; - - if (r >= dp->num_stack_tx_rings) - bias = dp->num_stack_tx_rings; - - nfp_net_tx_ring_init(&dp->tx_rings[r], &nn->r_vecs[r - bias], - r, bias); - - if (nfp_net_tx_ring_alloc(dp, &dp->tx_rings[r])) - goto err_free_prev; - - if (nfp_net_tx_ring_bufs_alloc(dp, &dp->tx_rings[r])) - goto err_free_ring; - } - - return 0; - -err_free_prev: - while (r--) { - nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); -err_free_ring: - nfp_net_tx_ring_free(&dp->tx_rings[r]); - } - kfree(dp->tx_rings); - return -ENOMEM; -} - -static void nfp_net_tx_rings_free(struct nfp_net_dp *dp) +nfp_net_napi_add(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, int idx) { - unsigned int r; - - for (r = 0; r < dp->num_tx_rings; r++) { - nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); - nfp_net_tx_ring_free(&dp->tx_rings[r]); - } - - kfree(dp->tx_rings); -} - -/** - * nfp_net_rx_ring_free() - Free resources allocated to a RX ring - * @rx_ring: RX ring to free - */ -static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) -{ - struct nfp_net_r_vector *r_vec = rx_ring->r_vec; - struct nfp_net_dp *dp = &r_vec->nfp_net->dp; - if (dp->netdev) - xdp_rxq_info_unreg(&rx_ring->xdp_rxq); - kvfree(rx_ring->rxbufs); - - if (rx_ring->rxds) - dma_free_coherent(dp->dev, rx_ring->size, - rx_ring->rxds, rx_ring->dma); - - rx_ring->cnt = 0; - rx_ring->rxbufs = NULL; - rx_ring->rxds = NULL; - rx_ring->dma = 0; - rx_ring->size = 0; -} - -/** - * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring - * @dp: NFP Net data path struct - * @rx_ring: RX ring to allocate - * - * Return: 0 on success, negative errno otherwise. - */ -static int -nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring) -{ - int err; - - if (dp->netdev) { - err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev, - rx_ring->idx, rx_ring->r_vec->napi.napi_id); - if (err < 0) - return err; - } - - rx_ring->cnt = dp->rxd_cnt; - rx_ring->size = array_size(rx_ring->cnt, sizeof(*rx_ring->rxds)); - rx_ring->rxds = dma_alloc_coherent(dp->dev, rx_ring->size, - &rx_ring->dma, - GFP_KERNEL | __GFP_NOWARN); - if (!rx_ring->rxds) { - netdev_warn(dp->netdev, "failed to allocate RX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n", - rx_ring->cnt); - goto err_alloc; - } - - rx_ring->rxbufs = kvcalloc(rx_ring->cnt, sizeof(*rx_ring->rxbufs), - GFP_KERNEL); - if (!rx_ring->rxbufs) - goto err_alloc; - - return 0; - -err_alloc: - nfp_net_rx_ring_free(rx_ring); - return -ENOMEM; -} - -static int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) -{ - unsigned int r; - - dp->rx_rings = kcalloc(dp->num_rx_rings, sizeof(*dp->rx_rings), - GFP_KERNEL); - if (!dp->rx_rings) - return -ENOMEM; - - for (r = 0; r < dp->num_rx_rings; r++) { - nfp_net_rx_ring_init(&dp->rx_rings[r], &nn->r_vecs[r], r); - - if (nfp_net_rx_ring_alloc(dp, &dp->rx_rings[r])) - goto err_free_prev; - - if (nfp_net_rx_ring_bufs_alloc(dp, &dp->rx_rings[r])) - goto err_free_ring; - } - - return 0; - -err_free_prev: - while (r--) { - nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); -err_free_ring: - nfp_net_rx_ring_free(&dp->rx_rings[r]); - } - kfree(dp->rx_rings); - return -ENOMEM; + netif_napi_add(dp->netdev, &r_vec->napi, + nfp_net_has_xsk_pool_slow(dp, idx) ? dp->ops->xsk_poll : dp->ops->poll); + else + tasklet_enable(&r_vec->tasklet); } -static void nfp_net_rx_rings_free(struct nfp_net_dp *dp) +static void +nfp_net_napi_del(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec) { - unsigned int r; - - for (r = 0; r < dp->num_rx_rings; r++) { - nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); - nfp_net_rx_ring_free(&dp->rx_rings[r]); - } - - kfree(dp->rx_rings); + if (dp->netdev) + netif_napi_del(&r_vec->napi); + else + tasklet_disable(&r_vec->tasklet); } static void @@ -2648,6 +795,17 @@ nfp_net_vector_assign_rings(struct nfp_net_dp *dp, r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ? &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL; + + if (nfp_net_has_xsk_pool_slow(dp, idx) || r_vec->xsk_pool) { + r_vec->xsk_pool = dp->xdp_prog ? dp->xsk_pools[idx] : NULL; + + if (r_vec->xsk_pool) + xsk_pool_set_rxq_info(r_vec->xsk_pool, + &r_vec->rx_ring->xdp_rxq); + + nfp_net_napi_del(dp, r_vec); + nfp_net_napi_add(dp, r_vec, idx); + } } static int @@ -2656,23 +814,14 @@ nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, { int err; - /* Setup NAPI */ - if (nn->dp.netdev) - netif_napi_add(nn->dp.netdev, &r_vec->napi, - nfp_net_poll, NAPI_POLL_WEIGHT); - else - tasklet_enable(&r_vec->tasklet); + nfp_net_napi_add(&nn->dp, r_vec, idx); snprintf(r_vec->name, sizeof(r_vec->name), "%s-rxtx-%d", nfp_net_name(nn), idx); err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name, r_vec); if (err) { - if (nn->dp.netdev) - netif_napi_del(&r_vec->napi); - else - tasklet_disable(&r_vec->tasklet); - + nfp_net_napi_del(&nn->dp, r_vec); nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector); return err; } @@ -2690,11 +839,7 @@ static void nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) { irq_set_affinity_hint(r_vec->irq_vector, NULL); - if (nn->dp.netdev) - netif_napi_del(&r_vec->napi); - else - tasklet_disable(&r_vec->tasklet); - + nfp_net_napi_del(&nn->dp, r_vec); free_irq(r_vec->irq_vector, r_vec); } @@ -2768,17 +913,6 @@ static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr) nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4)); } -static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) -{ - nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); - nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); - nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); - - nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); - nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); - nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); -} - /** * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP * @nn: NFP Net device to reconfigure @@ -2808,8 +942,11 @@ static void nfp_net_clear_config_and_disable(struct nfp_net *nn) if (err) nn_err(nn, "Could not disable device: %d\n", err); - for (r = 0; r < nn->dp.num_rx_rings; r++) + for (r = 0; r < nn->dp.num_rx_rings; r++) { nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]); + if (nfp_net_has_xsk_pool_slow(&nn->dp, nn->dp.rx_rings[r].idx)) + nfp_net_xsk_rx_bufs_free(&nn->dp.rx_rings[r]); + } for (r = 0; r < nn->dp.num_tx_rings; r++) nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]); for (r = 0; r < nn->dp.num_r_vecs; r++) @@ -2818,25 +955,6 @@ static void nfp_net_clear_config_and_disable(struct nfp_net *nn) nn->dp.ctrl = new_ctrl; } -static void -nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn, - struct nfp_net_rx_ring *rx_ring, unsigned int idx) -{ - /* Write the DMA address, size and MSI-X info to the device */ - nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma); - nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt)); - nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry); -} - -static void -nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, - struct nfp_net_tx_ring *tx_ring, unsigned int idx) -{ - nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma); - nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt)); - nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry); -} - /** * nfp_net_set_config_and_enable() - Write control BAR and enable NFP * @nn: NFP Net device to reconfigure @@ -2866,11 +984,11 @@ static int nfp_net_set_config_and_enable(struct nfp_net *nn) for (r = 0; r < nn->dp.num_rx_rings; r++) nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r); - nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->dp.num_tx_rings == 64 ? - 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_tx_rings) - 1); + nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, + U64_MAX >> (64 - nn->dp.num_tx_rings)); - nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->dp.num_rx_rings == 64 ? - 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_rx_rings) - 1); + nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, + U64_MAX >> (64 - nn->dp.num_rx_rings)); if (nn->dp.netdev) nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); @@ -3296,20 +1414,39 @@ struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) *new = nn->dp; + new->xsk_pools = kmemdup(new->xsk_pools, + array_size(nn->max_r_vecs, + sizeof(new->xsk_pools)), + GFP_KERNEL); + if (!new->xsk_pools) { + kfree(new); + return NULL; + } + /* Clear things which need to be recomputed */ new->fl_bufsz = 0; new->tx_rings = NULL; new->rx_rings = NULL; new->num_r_vecs = 0; new->num_stack_tx_rings = 0; + new->txrwb = NULL; + new->txrwb_dma = 0; return new; } +static void nfp_net_free_dp(struct nfp_net_dp *dp) +{ + kfree(dp->xsk_pools); + kfree(dp); +} + static int nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, struct netlink_ext_ack *extack) { + unsigned int r, xsk_min_fl_bufsz; + /* XDP-enabled tests */ if (!dp->xdp_prog) return 0; @@ -3322,6 +1459,18 @@ nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, return -EINVAL; } + xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp); + for (r = 0; r < nn->max_r_vecs; r++) { + if (!dp->xsk_pools[r]) + continue; + + if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) { + NL_SET_ERR_MSG_MOD(extack, + "XSK buffer pool chunk size too small"); + return -EINVAL; + } + } + return 0; } @@ -3389,7 +1538,7 @@ int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, nfp_net_open_stack(nn); exit_free_dp: - kfree(dp); + nfp_net_free_dp(dp); return err; @@ -3398,7 +1547,7 @@ err_free_rx: err_cleanup_vecs: for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); - kfree(dp); + nfp_net_free_dp(dp); return err; } @@ -3482,21 +1631,21 @@ static void nfp_net_stat64(struct net_device *netdev, unsigned int start; do { - start = u64_stats_fetch_begin(&r_vec->rx_sync); + start = u64_stats_fetch_begin_irq(&r_vec->rx_sync); data[0] = r_vec->rx_pkts; data[1] = r_vec->rx_bytes; data[2] = r_vec->rx_drops; - } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); + } while (u64_stats_fetch_retry_irq(&r_vec->rx_sync, start)); stats->rx_packets += data[0]; stats->rx_bytes += data[1]; stats->rx_dropped += data[2]; do { - start = u64_stats_fetch_begin(&r_vec->tx_sync); + start = u64_stats_fetch_begin_irq(&r_vec->tx_sync); data[0] = r_vec->tx_pkts; data[1] = r_vec->tx_bytes; data[2] = r_vec->tx_errors; - } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); + } while (u64_stats_fetch_retry_irq(&r_vec->tx_sync, start)); stats->tx_packets += data[0]; stats->tx_bytes += data[1]; stats->tx_errors += data[2]; @@ -3547,16 +1696,18 @@ static int nfp_net_set_features(struct net_device *netdev, if (changed & NETIF_F_HW_VLAN_CTAG_RX) { if (features & NETIF_F_HW_VLAN_CTAG_RX) - new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?: + NFP_NET_CFG_CTRL_RXVLAN; else - new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; + new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY; } if (changed & NETIF_F_HW_VLAN_CTAG_TX) { if (features & NETIF_F_HW_VLAN_CTAG_TX) - new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?: + NFP_NET_CFG_CTRL_TXVLAN; else - new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; + new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY; } if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { @@ -3566,6 +1717,13 @@ static int nfp_net_set_features(struct net_device *netdev, new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER; } + if (changed & NETIF_F_HW_VLAN_STAG_RX) { + if (features & NETIF_F_HW_VLAN_STAG_RX) + new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ; + else + new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ; + } + if (changed & NETIF_F_SG) { if (features & NETIF_F_SG) new_ctrl |= NFP_NET_CFG_CTRL_GATHER; @@ -3595,6 +1753,27 @@ static int nfp_net_set_features(struct net_device *netdev, } static netdev_features_t +nfp_net_fix_features(struct net_device *netdev, + netdev_features_t features) +{ + if ((features & NETIF_F_HW_VLAN_CTAG_RX) && + (features & NETIF_F_HW_VLAN_STAG_RX)) { + if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) { + features &= ~NETIF_F_HW_VLAN_CTAG_RX; + netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX; + netdev_warn(netdev, + "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n"); + } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) { + features &= ~NETIF_F_HW_VLAN_STAG_RX; + netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX; + netdev_warn(netdev, + "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n"); + } + } + return features; +} + +static netdev_features_t nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features) { @@ -3610,8 +1789,7 @@ nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, if (skb_is_gso(skb)) { u32 hdrlen; - hdrlen = skb_inner_transport_header(skb) - skb->data + - inner_tcp_hdrlen(skb); + hdrlen = skb_inner_tcp_all_headers(skb); /* Assume worst case scenario of having longest possible * metadata prepend - 8B @@ -3716,6 +1894,9 @@ static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp) return nfp_net_xdp_setup_drv(nn, xdp); case XDP_SETUP_PROG_HW: return nfp_net_xdp_setup_hw(nn, xdp); + case XDP_SETUP_XSK_POOL: + return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool, + xdp->xsk.queue_id); default: return nfp_app_bpf(nn->app, nn, xdp); } @@ -3742,7 +1923,70 @@ static int nfp_net_set_mac_address(struct net_device *netdev, void *addr) return 0; } -const struct net_device_ops nfp_net_netdev_ops = { +static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, + struct net_device *dev, u32 filter_mask, + int nlflags) +{ + struct nfp_net *nn = netdev_priv(dev); + u16 mode; + + if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA)) + return -EOPNOTSUPP; + + mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ? + BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB; + + return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, + nlflags, filter_mask, NULL); +} + +static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh, + u16 flags, struct netlink_ext_ack *extack) +{ + struct nfp_net *nn = netdev_priv(dev); + struct nlattr *attr, *br_spec; + int rem, err; + u32 new_ctrl; + u16 mode; + + if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA)) + return -EOPNOTSUPP; + + br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); + if (!br_spec) + return -EINVAL; + + nla_for_each_nested(attr, br_spec, rem) { + if (nla_type(attr) != IFLA_BRIDGE_MODE) + continue; + + if (nla_len(attr) < sizeof(mode)) + return -EINVAL; + + new_ctrl = nn->dp.ctrl; + mode = nla_get_u16(attr); + if (mode == BRIDGE_MODE_VEPA) + new_ctrl |= NFP_NET_CFG_CTRL_VEPA; + else if (mode == BRIDGE_MODE_VEB) + new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA; + else + return -EOPNOTSUPP; + + if (new_ctrl == nn->dp.ctrl) + return 0; + + nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); + err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); + if (!err) + nn->dp.ctrl = new_ctrl; + + return err; + } + + return -EINVAL; +} + +const struct net_device_ops nfp_nfd3_netdev_ops = { .ndo_init = nfp_app_ndo_init, .ndo_uninit = nfp_app_ndo_uninit, .ndo_open = nfp_net_netdev_open, @@ -3753,6 +1997,7 @@ const struct net_device_ops nfp_net_netdev_ops = { .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, .ndo_set_vf_mac = nfp_app_set_vf_mac, .ndo_set_vf_vlan = nfp_app_set_vf_vlan, + .ndo_set_vf_rate = nfp_app_set_vf_rate, .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, .ndo_set_vf_trust = nfp_app_set_vf_trust, .ndo_get_vf_config = nfp_app_get_vf_config, @@ -3763,10 +2008,45 @@ const struct net_device_ops nfp_net_netdev_ops = { .ndo_change_mtu = nfp_net_change_mtu, .ndo_set_mac_address = nfp_net_set_mac_address, .ndo_set_features = nfp_net_set_features, + .ndo_fix_features = nfp_net_fix_features, .ndo_features_check = nfp_net_features_check, .ndo_get_phys_port_name = nfp_net_get_phys_port_name, .ndo_bpf = nfp_net_xdp, + .ndo_xsk_wakeup = nfp_net_xsk_wakeup, .ndo_get_devlink_port = nfp_devlink_get_devlink_port, + .ndo_bridge_getlink = nfp_net_bridge_getlink, + .ndo_bridge_setlink = nfp_net_bridge_setlink, +}; + +const struct net_device_ops nfp_nfdk_netdev_ops = { + .ndo_init = nfp_app_ndo_init, + .ndo_uninit = nfp_app_ndo_uninit, + .ndo_open = nfp_net_netdev_open, + .ndo_stop = nfp_net_netdev_close, + .ndo_start_xmit = nfp_net_tx, + .ndo_get_stats64 = nfp_net_stat64, + .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, + .ndo_set_vf_mac = nfp_app_set_vf_mac, + .ndo_set_vf_vlan = nfp_app_set_vf_vlan, + .ndo_set_vf_rate = nfp_app_set_vf_rate, + .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, + .ndo_set_vf_trust = nfp_app_set_vf_trust, + .ndo_get_vf_config = nfp_app_get_vf_config, + .ndo_set_vf_link_state = nfp_app_set_vf_link_state, + .ndo_setup_tc = nfp_port_setup_tc, + .ndo_tx_timeout = nfp_net_tx_timeout, + .ndo_set_rx_mode = nfp_net_set_rx_mode, + .ndo_change_mtu = nfp_net_change_mtu, + .ndo_set_mac_address = nfp_net_set_mac_address, + .ndo_set_features = nfp_net_set_features, + .ndo_fix_features = nfp_net_fix_features, + .ndo_features_check = nfp_net_features_check, + .ndo_get_phys_port_name = nfp_net_get_phys_port_name, + .ndo_bpf = nfp_net_xdp, + .ndo_get_devlink_port = nfp_devlink_get_devlink_port, + .ndo_bridge_getlink = nfp_net_bridge_getlink, + .ndo_bridge_setlink = nfp_net_bridge_setlink, }; static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table) @@ -3806,15 +2086,15 @@ static const struct udp_tunnel_nic_info nfp_udp_tunnels = { */ void nfp_net_info(struct nfp_net *nn) { - nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", + nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", nn->dp.is_vf ? "VF " : "", nn->dp.num_tx_rings, nn->max_tx_rings, nn->dp.num_rx_rings, nn->max_rx_rings); nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", - nn->fw_ver.resv, nn->fw_ver.class, + nn->fw_ver.extend, nn->fw_ver.class, nn->fw_ver.major, nn->fw_ver.minor, nn->max_mtu); - nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", nn->cap, nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", @@ -3823,6 +2103,9 @@ void nfp_net_info(struct nfp_net *nn) nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", + nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "", + nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "", + nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "", nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "", @@ -3832,6 +2115,8 @@ void nfp_net_info(struct nfp_net *nn) nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "", nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", + nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "", + nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "", nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ? @@ -3843,6 +2128,7 @@ void nfp_net_info(struct nfp_net *nn) /** * nfp_net_alloc() - Allocate netdev and related structure * @pdev: PCI device + * @dev_info: NFP ASIC params * @ctrl_bar: PCI IOMEM with vNIC config memory * @needs_netdev: Whether to allocate a netdev for this vNIC * @max_tx_rings: Maximum number of TX rings supported by device @@ -3855,9 +2141,11 @@ void nfp_net_info(struct nfp_net *nn) * Return: NFP Net device structure, or ERR_PTR on error. */ struct nfp_net * -nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev, +nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info, + void __iomem *ctrl_bar, bool needs_netdev, unsigned int max_tx_rings, unsigned int max_rx_rings) { + u64 dma_mask = dma_get_mask(&pdev->dev); struct nfp_net *nn; int err; @@ -3880,7 +2168,36 @@ nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev, nn->dp.dev = &pdev->dev; nn->dp.ctrl_bar = ctrl_bar; + nn->dev_info = dev_info; nn->pdev = pdev; + nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar); + + switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) { + case NFP_NET_CFG_VERSION_DP_NFD3: + nn->dp.ops = &nfp_nfd3_ops; + break; + case NFP_NET_CFG_VERSION_DP_NFDK: + if (nn->fw_ver.major < 5) { + dev_err(&pdev->dev, + "NFDK must use ABI 5 or newer, found: %d\n", + nn->fw_ver.major); + err = -EINVAL; + goto err_free_nn; + } + nn->dp.ops = &nfp_nfdk_ops; + break; + default: + err = -EINVAL; + goto err_free_nn; + } + + if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) { + dev_err(&pdev->dev, + "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n", + nn->dp.ops->dma_mask, dma_mask); + err = -EINVAL; + goto err_free_nn; + } nn->max_tx_rings = max_tx_rings; nn->max_rx_rings = max_rx_rings; @@ -3893,6 +2210,14 @@ nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev, nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings); nn->dp.num_r_vecs = min_t(unsigned int, nn->dp.num_r_vecs, num_online_cpus()); + nn->max_r_vecs = nn->dp.num_r_vecs; + + nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(nn->dp.xsk_pools), + GFP_KERNEL); + if (!nn->dp.xsk_pools) { + err = -ENOMEM; + goto err_free_nn; + } nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT; nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; @@ -3932,6 +2257,7 @@ void nfp_net_free(struct nfp_net *nn) WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted); nfp_ccm_mbox_free(nn); + kfree(nn->dp.xsk_pools); if (nn->dp.netdev) free_netdev(nn->dp.netdev); else @@ -4048,8 +2374,12 @@ static void nfp_net_netdev_init(struct nfp_net *nn) if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) netdev->hw_features |= NETIF_F_RXHASH; if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) { - if (nn->cap & NFP_NET_CFG_CTRL_LSO) - netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL; + if (nn->cap & NFP_NET_CFG_CTRL_LSO) { + netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL | + NETIF_F_GSO_UDP_TUNNEL_CSUM | + NETIF_F_GSO_PARTIAL; + netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM; + } netdev->udp_tunnel_nic_info = &nfp_udp_tunnels; nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN; } @@ -4063,41 +2393,57 @@ static void nfp_net_netdev_init(struct nfp_net *nn) netdev->vlan_features = netdev->hw_features; - if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { + if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) { netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; - nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN; + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?: + NFP_NET_CFG_CTRL_RXVLAN; } - if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { + if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) { if (nn->cap & NFP_NET_CFG_CTRL_LSO2) { nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); } else { netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; - nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXVLAN; + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?: + NFP_NET_CFG_CTRL_TXVLAN; } } if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) { netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; } + if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) { + netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX; + nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ; + } netdev->features = netdev->hw_features; if (nfp_app_has_tc(nn->app) && nn->port) netdev->hw_features |= NETIF_F_HW_TC; - /* Advertise but disable TSO by default. */ - netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); - nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; + /* C-Tag strip and S-Tag strip can't be supported simultaneously, + * so enable C-Tag strip and disable S-Tag strip by default. + */ + netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX; + nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ; /* Finalise the netdev setup */ - netdev->netdev_ops = &nfp_net_netdev_ops; + switch (nn->dp.ops->version) { + case NFP_NFD_VER_NFD3: + netdev->netdev_ops = &nfp_nfd3_netdev_ops; + break; + case NFP_NFD_VER_NFDK: + netdev->netdev_ops = &nfp_nfdk_netdev_ops; + break; + } + netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); /* MTU range: 68 - hw-specific max */ netdev->min_mtu = ETH_MIN_MTU; netdev->max_mtu = nn->max_mtu; - netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS; + netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS); netif_carrier_off(netdev); @@ -4138,6 +2484,9 @@ static int nfp_net_read_caps(struct nfp_net *nn) nn->dp.rx_offset = NFP_NET_RX_OFFSET; } + /* Mask out NFD-version-specific features */ + nn->cap &= nn->dp.ops->cap_mask; + /* For control vNICs mask out the capabilities app doesn't want. */ if (!nn->dp.netdev) nn->cap &= nn->app->type->ctrl_cap_mask; @@ -4190,6 +2539,10 @@ int nfp_net_init(struct nfp_net *nn) nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD; } + /* Enable TX pointer writeback, if supported */ + if (nn->cap & NFP_NET_CFG_CTRL_TXRWB) + nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB; + /* Stash the re-configuration queue away. First odd queue in TX Bar */ nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; |