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-rw-r--r--target/linux/mvebu/patches-5.4/006-net-mvneta-add-basic-XDP-support.patch311
1 files changed, 0 insertions, 311 deletions
diff --git a/target/linux/mvebu/patches-5.4/006-net-mvneta-add-basic-XDP-support.patch b/target/linux/mvebu/patches-5.4/006-net-mvneta-add-basic-XDP-support.patch
deleted file mode 100644
index 33a7a27f43..0000000000
--- a/target/linux/mvebu/patches-5.4/006-net-mvneta-add-basic-XDP-support.patch
+++ /dev/null
@@ -1,311 +0,0 @@
-From 0db51da7a8e99f0803ec3a8e25c1a66234a219cb Mon Sep 17 00:00:00 2001
-From: Lorenzo Bianconi <lorenzo@kernel.org>
-Date: Sat, 19 Oct 2019 10:13:24 +0200
-Subject: [PATCH 4/7] net: mvneta: add basic XDP support
-
-Add basic XDP support to mvneta driver for devices that rely on software
-buffer management. Currently supported verdicts are:
-- XDP_DROP
-- XDP_PASS
-- XDP_REDIRECT
-- XDP_ABORTED
-
-- iptables drop:
-$iptables -t raw -I PREROUTING -p udp --dport 9 -j DROP
-$nstat -n && sleep 1 && nstat
-IpInReceives 151169 0.0
-IpExtInOctets 6953544 0.0
-IpExtInNoECTPkts 151165 0.0
-
-- XDP_DROP via xdp1
-$./samples/bpf/xdp1 3
-proto 0: 421419 pkt/s
-proto 0: 421444 pkt/s
-proto 0: 421393 pkt/s
-proto 0: 421440 pkt/s
-proto 0: 421184 pkt/s
-
-Tested-by: Matteo Croce <mcroce@redhat.com>
-Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- drivers/net/ethernet/marvell/mvneta.c | 148 ++++++++++++++++++++++++--
- 1 file changed, 139 insertions(+), 9 deletions(-)
-
---- a/drivers/net/ethernet/marvell/mvneta.c
-+++ b/drivers/net/ethernet/marvell/mvneta.c
-@@ -38,6 +38,7 @@
- #include <net/ipv6.h>
- #include <net/tso.h>
- #include <net/page_pool.h>
-+#include <linux/bpf_trace.h>
-
- /* Registers */
- #define MVNETA_RXQ_CONFIG_REG(q) (0x1400 + ((q) << 2))
-@@ -325,8 +326,10 @@
- ETH_HLEN + ETH_FCS_LEN, \
- cache_line_size())
-
-+#define MVNETA_SKB_HEADROOM (max(XDP_PACKET_HEADROOM, NET_SKB_PAD) + \
-+ NET_IP_ALIGN)
- #define MVNETA_SKB_PAD (SKB_DATA_ALIGN(sizeof(struct skb_shared_info) + \
-- NET_SKB_PAD))
-+ MVNETA_SKB_HEADROOM))
- #define MVNETA_SKB_SIZE(len) (SKB_DATA_ALIGN(len) + MVNETA_SKB_PAD)
- #define MVNETA_MAX_RX_BUF_SIZE (PAGE_SIZE - MVNETA_SKB_PAD)
-
-@@ -354,6 +357,11 @@ struct mvneta_statistic {
- #define T_REG_64 64
- #define T_SW 1
-
-+#define MVNETA_XDP_PASS BIT(0)
-+#define MVNETA_XDP_DROPPED BIT(1)
-+#define MVNETA_XDP_TX BIT(2)
-+#define MVNETA_XDP_REDIR BIT(3)
-+
- static const struct mvneta_statistic mvneta_statistics[] = {
- { 0x3000, T_REG_64, "good_octets_received", },
- { 0x3010, T_REG_32, "good_frames_received", },
-@@ -435,6 +443,8 @@ struct mvneta_port {
- u32 cause_rx_tx;
- struct napi_struct napi;
-
-+ struct bpf_prog *xdp_prog;
-+
- /* Core clock */
- struct clk *clk;
- /* AXI clock */
-@@ -1965,10 +1975,50 @@ int mvneta_rx_refill_queue(struct mvneta
- }
-
- static int
-+mvneta_run_xdp(struct mvneta_port *pp, struct mvneta_rx_queue *rxq,
-+ struct bpf_prog *prog, struct xdp_buff *xdp)
-+{
-+ u32 ret, act = bpf_prog_run_xdp(prog, xdp);
-+
-+ switch (act) {
-+ case XDP_PASS:
-+ ret = MVNETA_XDP_PASS;
-+ break;
-+ case XDP_REDIRECT: {
-+ int err;
-+
-+ err = xdp_do_redirect(pp->dev, xdp, prog);
-+ if (err) {
-+ ret = MVNETA_XDP_DROPPED;
-+ xdp_return_buff(xdp);
-+ } else {
-+ ret = MVNETA_XDP_REDIR;
-+ }
-+ break;
-+ }
-+ default:
-+ bpf_warn_invalid_xdp_action(act);
-+ /* fall through */
-+ case XDP_ABORTED:
-+ trace_xdp_exception(pp->dev, prog, act);
-+ /* fall through */
-+ case XDP_DROP:
-+ page_pool_recycle_direct(rxq->page_pool,
-+ virt_to_head_page(xdp->data));
-+ ret = MVNETA_XDP_DROPPED;
-+ break;
-+ }
-+
-+ return ret;
-+}
-+
-+static int
- mvneta_swbm_rx_frame(struct mvneta_port *pp,
- struct mvneta_rx_desc *rx_desc,
- struct mvneta_rx_queue *rxq,
-- struct page *page)
-+ struct xdp_buff *xdp,
-+ struct bpf_prog *xdp_prog,
-+ struct page *page, u32 *xdp_ret)
- {
- unsigned char *data = page_address(page);
- int data_len = -MVNETA_MH_SIZE, len;
-@@ -1988,7 +2038,26 @@ mvneta_swbm_rx_frame(struct mvneta_port
- rx_desc->buf_phys_addr,
- len, dma_dir);
-
-- rxq->skb = build_skb(data, PAGE_SIZE);
-+ xdp->data_hard_start = data;
-+ xdp->data = data + MVNETA_SKB_HEADROOM + MVNETA_MH_SIZE;
-+ xdp->data_end = xdp->data + data_len;
-+ xdp_set_data_meta_invalid(xdp);
-+
-+ if (xdp_prog) {
-+ u32 ret;
-+
-+ ret = mvneta_run_xdp(pp, rxq, xdp_prog, xdp);
-+ if (ret != MVNETA_XDP_PASS) {
-+ mvneta_update_stats(pp, 1,
-+ xdp->data_end - xdp->data,
-+ false);
-+ rx_desc->buf_phys_addr = 0;
-+ *xdp_ret |= ret;
-+ return ret;
-+ }
-+ }
-+
-+ rxq->skb = build_skb(xdp->data_hard_start, PAGE_SIZE);
- if (unlikely(!rxq->skb)) {
- netdev_err(dev,
- "Can't allocate skb on queue %d\n",
-@@ -1999,8 +2068,9 @@ mvneta_swbm_rx_frame(struct mvneta_port
- }
- page_pool_release_page(rxq->page_pool, page);
-
-- skb_reserve(rxq->skb, MVNETA_MH_SIZE + NET_SKB_PAD);
-- skb_put(rxq->skb, data_len);
-+ skb_reserve(rxq->skb,
-+ xdp->data - xdp->data_hard_start);
-+ skb_put(rxq->skb, xdp->data_end - xdp->data);
- mvneta_rx_csum(pp, rx_desc->status, rxq->skb);
-
- rxq->left_size = rx_desc->data_size - len;
-@@ -2034,7 +2104,7 @@ mvneta_swbm_add_rx_fragment(struct mvnet
- /* refill descriptor with new buffer later */
- skb_add_rx_frag(rxq->skb,
- skb_shinfo(rxq->skb)->nr_frags,
-- page, NET_SKB_PAD, data_len,
-+ page, MVNETA_SKB_HEADROOM, data_len,
- PAGE_SIZE);
- }
- page_pool_release_page(rxq->page_pool, page);
-@@ -2049,11 +2119,18 @@ static int mvneta_rx_swbm(struct napi_st
- {
- int rcvd_pkts = 0, rcvd_bytes = 0, rx_proc = 0;
- struct net_device *dev = pp->dev;
-+ struct bpf_prog *xdp_prog;
-+ struct xdp_buff xdp_buf;
- int rx_todo, refill;
-+ u32 xdp_ret = 0;
-
- /* Get number of received packets */
- rx_todo = mvneta_rxq_busy_desc_num_get(pp, rxq);
-
-+ rcu_read_lock();
-+ xdp_prog = READ_ONCE(pp->xdp_prog);
-+ xdp_buf.rxq = &rxq->xdp_rxq;
-+
- /* Fairness NAPI loop */
- while (rx_proc < budget && rx_proc < rx_todo) {
- struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq);
-@@ -2081,7 +2158,8 @@ static int mvneta_rx_swbm(struct napi_st
- continue;
- }
-
-- err = mvneta_swbm_rx_frame(pp, rx_desc, rxq, page);
-+ err = mvneta_swbm_rx_frame(pp, rx_desc, rxq, &xdp_buf,
-+ xdp_prog, page, &xdp_ret);
- if (err)
- continue;
- } else {
-@@ -2116,6 +2194,10 @@ static int mvneta_rx_swbm(struct napi_st
- /* clean uncomplete skb pointer in queue */
- rxq->skb = NULL;
- }
-+ rcu_read_unlock();
-+
-+ if (xdp_ret & MVNETA_XDP_REDIR)
-+ xdp_do_flush_map();
-
- if (rcvd_pkts)
- mvneta_update_stats(pp, rcvd_pkts, rcvd_bytes, false);
-@@ -2857,13 +2939,14 @@ static int mvneta_poll(struct napi_struc
- static int mvneta_create_page_pool(struct mvneta_port *pp,
- struct mvneta_rx_queue *rxq, int size)
- {
-+ struct bpf_prog *xdp_prog = READ_ONCE(pp->xdp_prog);
- struct page_pool_params pp_params = {
- .order = 0,
- .flags = PP_FLAG_DMA_MAP,
- .pool_size = size,
- .nid = cpu_to_node(0),
- .dev = pp->dev->dev.parent,
-- .dma_dir = DMA_FROM_DEVICE,
-+ .dma_dir = xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE,
- };
- int err;
-
-@@ -3366,6 +3449,11 @@ static int mvneta_change_mtu(struct net_
- mtu = ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8);
- }
-
-+ if (pp->xdp_prog && mtu > MVNETA_MAX_RX_BUF_SIZE) {
-+ netdev_info(dev, "Illegal MTU value %d for XDP mode\n", mtu);
-+ return -EINVAL;
-+ }
-+
- dev->mtu = mtu;
-
- if (!netif_running(dev)) {
-@@ -4036,6 +4124,47 @@ static int mvneta_ioctl(struct net_devic
- return phylink_mii_ioctl(pp->phylink, ifr, cmd);
- }
-
-+static int mvneta_xdp_setup(struct net_device *dev, struct bpf_prog *prog,
-+ struct netlink_ext_ack *extack)
-+{
-+ bool need_update, running = netif_running(dev);
-+ struct mvneta_port *pp = netdev_priv(dev);
-+ struct bpf_prog *old_prog;
-+
-+ if (prog && dev->mtu > MVNETA_MAX_RX_BUF_SIZE) {
-+ NL_SET_ERR_MSG_MOD(extack, "Jumbo frames not supported on XDP");
-+ return -EOPNOTSUPP;
-+ }
-+
-+ need_update = !!pp->xdp_prog != !!prog;
-+ if (running && need_update)
-+ mvneta_stop(dev);
-+
-+ old_prog = xchg(&pp->xdp_prog, prog);
-+ if (old_prog)
-+ bpf_prog_put(old_prog);
-+
-+ if (running && need_update)
-+ return mvneta_open(dev);
-+
-+ return 0;
-+}
-+
-+static int mvneta_xdp(struct net_device *dev, struct netdev_bpf *xdp)
-+{
-+ struct mvneta_port *pp = netdev_priv(dev);
-+
-+ switch (xdp->command) {
-+ case XDP_SETUP_PROG:
-+ return mvneta_xdp_setup(dev, xdp->prog, xdp->extack);
-+ case XDP_QUERY_PROG:
-+ xdp->prog_id = pp->xdp_prog ? pp->xdp_prog->aux->id : 0;
-+ return 0;
-+ default:
-+ return -EINVAL;
-+ }
-+}
-+
- /* Ethtool methods */
-
- /* Set link ksettings (phy address, speed) for ethtools */
-@@ -4432,6 +4561,7 @@ static const struct net_device_ops mvnet
- .ndo_fix_features = mvneta_fix_features,
- .ndo_get_stats64 = mvneta_get_stats64,
- .ndo_do_ioctl = mvneta_ioctl,
-+ .ndo_bpf = mvneta_xdp,
- };
-
- static const struct ethtool_ops mvneta_eth_tool_ops = {
-@@ -4718,7 +4848,7 @@ static int mvneta_probe(struct platform_
- SET_NETDEV_DEV(dev, &pdev->dev);
-
- pp->id = global_port_id++;
-- pp->rx_offset_correction = NET_SKB_PAD;
-+ pp->rx_offset_correction = MVNETA_SKB_HEADROOM;
-
- /* Obtain access to BM resources if enabled and already initialized */
- bm_node = of_parse_phandle(dn, "buffer-manager", 0);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-28 14:09:28 +0000