X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=blobdiff_plain;f=target%2Flinux%2Fmvebu%2Fpatches-5.4%2F008-net-mvneta-make-tx-buffer-array-agnostic.patch;fp=target%2Flinux%2Fmvebu%2Fpatches-5.4%2F008-net-mvneta-make-tx-buffer-array-agnostic.patch;h=e79aa816b88605a67e0aae3696aee7626521914f;hp=0000000000000000000000000000000000000000;hb=92b3efec54b36797614650c830a57c4f8786b5c9;hpb=bffb30603cca586ee2a5713748ed1f6e76d6754b diff --git a/target/linux/mvebu/patches-5.4/008-net-mvneta-make-tx-buffer-array-agnostic.patch b/target/linux/mvebu/patches-5.4/008-net-mvneta-make-tx-buffer-array-agnostic.patch new file mode 100644 index 0000000000..e79aa816b8 --- /dev/null +++ b/target/linux/mvebu/patches-5.4/008-net-mvneta-make-tx-buffer-array-agnostic.patch @@ -0,0 +1,210 @@ +From 9e58c8b410650b5a6eb5b8fad8474bd8425a4023 Mon Sep 17 00:00:00 2001 +From: Lorenzo Bianconi +Date: Sat, 19 Oct 2019 10:13:26 +0200 +Subject: [PATCH 6/7] net: mvneta: make tx buffer array agnostic + +Allow tx buffer array to contain both skb and xdp buffers in order to +enable xdp frame recycling adding XDP_TX verdict support + +Signed-off-by: Lorenzo Bianconi +Signed-off-by: David S. Miller +--- + drivers/net/ethernet/marvell/mvneta.c | 66 +++++++++++++++++---------- + 1 file changed, 43 insertions(+), 23 deletions(-) + +--- a/drivers/net/ethernet/marvell/mvneta.c ++++ b/drivers/net/ethernet/marvell/mvneta.c +@@ -565,6 +565,20 @@ struct mvneta_rx_desc { + }; + #endif + ++enum mvneta_tx_buf_type { ++ MVNETA_TYPE_SKB, ++ MVNETA_TYPE_XDP_TX, ++ MVNETA_TYPE_XDP_NDO, ++}; ++ ++struct mvneta_tx_buf { ++ enum mvneta_tx_buf_type type; ++ union { ++ struct xdp_frame *xdpf; ++ struct sk_buff *skb; ++ }; ++}; ++ + struct mvneta_tx_queue { + /* Number of this TX queue, in the range 0-7 */ + u8 id; +@@ -580,8 +594,8 @@ struct mvneta_tx_queue { + int tx_stop_threshold; + int tx_wake_threshold; + +- /* Array of transmitted skb */ +- struct sk_buff **tx_skb; ++ /* Array of transmitted buffers */ ++ struct mvneta_tx_buf *buf; + + /* Index of last TX DMA descriptor that was inserted */ + int txq_put_index; +@@ -1793,14 +1807,9 @@ static void mvneta_txq_bufs_free(struct + int i; + + for (i = 0; i < num; i++) { ++ struct mvneta_tx_buf *buf = &txq->buf[txq->txq_get_index]; + struct mvneta_tx_desc *tx_desc = txq->descs + + txq->txq_get_index; +- struct sk_buff *skb = txq->tx_skb[txq->txq_get_index]; +- +- if (skb) { +- bytes_compl += skb->len; +- pkts_compl++; +- } + + mvneta_txq_inc_get(txq); + +@@ -1808,9 +1817,12 @@ static void mvneta_txq_bufs_free(struct + dma_unmap_single(pp->dev->dev.parent, + tx_desc->buf_phys_addr, + tx_desc->data_size, DMA_TO_DEVICE); +- if (!skb) ++ if (!buf->skb) + continue; +- dev_kfree_skb_any(skb); ++ ++ bytes_compl += buf->skb->len; ++ pkts_compl++; ++ dev_kfree_skb_any(buf->skb); + } + + netdev_tx_completed_queue(nq, pkts_compl, bytes_compl); +@@ -2335,16 +2347,19 @@ static inline void + mvneta_tso_put_hdr(struct sk_buff *skb, + struct mvneta_port *pp, struct mvneta_tx_queue *txq) + { +- struct mvneta_tx_desc *tx_desc; + int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); ++ struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; ++ struct mvneta_tx_desc *tx_desc; + +- txq->tx_skb[txq->txq_put_index] = NULL; + tx_desc = mvneta_txq_next_desc_get(txq); + tx_desc->data_size = hdr_len; + tx_desc->command = mvneta_skb_tx_csum(pp, skb); + tx_desc->command |= MVNETA_TXD_F_DESC; + tx_desc->buf_phys_addr = txq->tso_hdrs_phys + + txq->txq_put_index * TSO_HEADER_SIZE; ++ buf->type = MVNETA_TYPE_SKB; ++ buf->skb = NULL; ++ + mvneta_txq_inc_put(txq); + } + +@@ -2353,6 +2368,7 @@ mvneta_tso_put_data(struct net_device *d + struct sk_buff *skb, char *data, int size, + bool last_tcp, bool is_last) + { ++ struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; + struct mvneta_tx_desc *tx_desc; + + tx_desc = mvneta_txq_next_desc_get(txq); +@@ -2366,7 +2382,8 @@ mvneta_tso_put_data(struct net_device *d + } + + tx_desc->command = 0; +- txq->tx_skb[txq->txq_put_index] = NULL; ++ buf->type = MVNETA_TYPE_SKB; ++ buf->skb = NULL; + + if (last_tcp) { + /* last descriptor in the TCP packet */ +@@ -2374,7 +2391,7 @@ mvneta_tso_put_data(struct net_device *d + + /* last descriptor in SKB */ + if (is_last) +- txq->tx_skb[txq->txq_put_index] = skb; ++ buf->skb = skb; + } + mvneta_txq_inc_put(txq); + return 0; +@@ -2459,6 +2476,7 @@ static int mvneta_tx_frag_process(struct + int i, nr_frags = skb_shinfo(skb)->nr_frags; + + for (i = 0; i < nr_frags; i++) { ++ struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; + skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + void *addr = skb_frag_address(frag); + +@@ -2478,12 +2496,13 @@ static int mvneta_tx_frag_process(struct + if (i == nr_frags - 1) { + /* Last descriptor */ + tx_desc->command = MVNETA_TXD_L_DESC | MVNETA_TXD_Z_PAD; +- txq->tx_skb[txq->txq_put_index] = skb; ++ buf->skb = skb; + } else { + /* Descriptor in the middle: Not First, Not Last */ + tx_desc->command = 0; +- txq->tx_skb[txq->txq_put_index] = NULL; ++ buf->skb = NULL; + } ++ buf->type = MVNETA_TYPE_SKB; + mvneta_txq_inc_put(txq); + } + +@@ -2511,6 +2530,7 @@ static netdev_tx_t mvneta_tx(struct sk_b + struct mvneta_port *pp = netdev_priv(dev); + u16 txq_id = skb_get_queue_mapping(skb); + struct mvneta_tx_queue *txq = &pp->txqs[txq_id]; ++ struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; + struct mvneta_tx_desc *tx_desc; + int len = skb->len; + int frags = 0; +@@ -2543,16 +2563,17 @@ static netdev_tx_t mvneta_tx(struct sk_b + goto out; + } + ++ buf->type = MVNETA_TYPE_SKB; + if (frags == 1) { + /* First and Last descriptor */ + tx_cmd |= MVNETA_TXD_FLZ_DESC; + tx_desc->command = tx_cmd; +- txq->tx_skb[txq->txq_put_index] = skb; ++ buf->skb = skb; + mvneta_txq_inc_put(txq); + } else { + /* First but not Last */ + tx_cmd |= MVNETA_TXD_F_DESC; +- txq->tx_skb[txq->txq_put_index] = NULL; ++ buf->skb = NULL; + mvneta_txq_inc_put(txq); + tx_desc->command = tx_cmd; + /* Continue with other skb fragments */ +@@ -3138,9 +3159,8 @@ static int mvneta_txq_sw_init(struct mvn + + txq->last_desc = txq->size - 1; + +- txq->tx_skb = kmalloc_array(txq->size, sizeof(*txq->tx_skb), +- GFP_KERNEL); +- if (!txq->tx_skb) { ++ txq->buf = kmalloc_array(txq->size, sizeof(*txq->buf), GFP_KERNEL); ++ if (!txq->buf) { + dma_free_coherent(pp->dev->dev.parent, + txq->size * MVNETA_DESC_ALIGNED_SIZE, + txq->descs, txq->descs_phys); +@@ -3152,7 +3172,7 @@ static int mvneta_txq_sw_init(struct mvn + txq->size * TSO_HEADER_SIZE, + &txq->tso_hdrs_phys, GFP_KERNEL); + if (!txq->tso_hdrs) { +- kfree(txq->tx_skb); ++ kfree(txq->buf); + dma_free_coherent(pp->dev->dev.parent, + txq->size * MVNETA_DESC_ALIGNED_SIZE, + txq->descs, txq->descs_phys); +@@ -3205,7 +3225,7 @@ static void mvneta_txq_sw_deinit(struct + { + struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id); + +- kfree(txq->tx_skb); ++ kfree(txq->buf); + + if (txq->tso_hdrs) + dma_free_coherent(pp->dev->dev.parent,