lan966x_ptp.o lan966x_fdma.o lan966x_lag.o \
lan966x_tc.o lan966x_mqprio.o lan966x_taprio.o \
lan966x_tbf.o lan966x_cbs.o lan966x_ets.o \
- lan966x_tc_matchall.o lan966x_police.o lan966x_mirror.o
+ lan966x_tc_matchall.o lan966x_police.o lan966x_mirror.o \
+ lan966x_xdp.o
static int lan966x_fdma_rx_check_frame(struct lan966x_rx *rx, u64 *src_port)
{
struct lan966x *lan966x = rx->lan966x;
+ struct lan966x_port *port;
struct lan966x_db *db;
struct page *page;
if (WARN_ON(*src_port >= lan966x->num_phys_ports))
return FDMA_ERROR;
- return FDMA_PASS;
+ port = lan966x->ports[*src_port];
+ if (!lan966x_xdp_port_present(port))
+ return FDMA_PASS;
+
+ return lan966x_xdp_run(port, page, FDMA_DCB_STATUS_BLOCKL(db->status));
}
static struct sk_buff *lan966x_fdma_rx_get_frame(struct lan966x_rx *rx,
lan966x_fdma_rx_free_page(rx);
lan966x_fdma_rx_advance_dcb(rx);
goto allocate_new;
+ case FDMA_DROP:
+ lan966x_fdma_rx_free_page(rx);
+ lan966x_fdma_rx_advance_dcb(rx);
+ continue;
}
skb = lan966x_fdma_rx_get_frame(rx, src_port);
.ndo_get_port_parent_id = lan966x_port_get_parent_id,
.ndo_eth_ioctl = lan966x_port_ioctl,
.ndo_setup_tc = lan966x_tc_setup,
+ .ndo_bpf = lan966x_xdp,
};
bool lan966x_netdevice_check(const struct net_device *dev)
if (port->dev)
unregister_netdev(port->dev);
+ lan966x_xdp_port_deinit(port);
if (lan966x->fdma && lan966x->fdma_ndev == port->dev)
lan966x_fdma_netdev_deinit(lan966x, port->dev);
lan966x->ports[p]->serdes = serdes;
lan966x_port_init(lan966x->ports[p]);
+ err = lan966x_xdp_port_init(lan966x->ports[p]);
+ if (err)
+ goto cleanup_ports;
}
lan966x_mdb_init(lan966x);
/* FDMA return action codes for checking if the frame is valid
* FDMA_PASS, frame is valid and can be used
* FDMA_ERROR, something went wrong, stop getting more frames
+ * FDMA_DROP, frame is dropped, but continue to get more frames
*/
enum lan966x_fdma_action {
FDMA_PASS = 0,
FDMA_ERROR,
+ FDMA_DROP,
};
struct lan966x_port;
enum netdev_lag_hash hash_type;
struct lan966x_port_tc tc;
+
+ struct bpf_prog *xdp_prog;
+ struct xdp_rxq_info xdp_rxq;
};
extern const struct phylink_mac_ops lan966x_phylink_mac_ops;
struct flow_stats *stats,
bool ingress);
+int lan966x_xdp_port_init(struct lan966x_port *port);
+void lan966x_xdp_port_deinit(struct lan966x_port *port);
+int lan966x_xdp(struct net_device *dev, struct netdev_bpf *xdp);
+int lan966x_xdp_run(struct lan966x_port *port,
+ struct page *page,
+ u32 data_len);
+static inline bool lan966x_xdp_port_present(struct lan966x_port *port)
+{
+ return !!port->xdp_prog;
+}
+
static inline void __iomem *lan_addr(void __iomem *base[],
int id, int tinst, int tcnt,
int gbase, int ginst,
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/bpf.h>
+#include <linux/bpf_trace.h>
+#include <linux/filter.h>
+
+#include "lan966x_main.h"
+
+static int lan966x_xdp_setup(struct net_device *dev, struct netdev_bpf *xdp)
+{
+ struct lan966x_port *port = netdev_priv(dev);
+ struct lan966x *lan966x = port->lan966x;
+ struct bpf_prog *old_prog;
+
+ if (!lan966x->fdma) {
+ NL_SET_ERR_MSG_MOD(xdp->extack,
+ "Allow to set xdp only when using fdma");
+ return -EOPNOTSUPP;
+ }
+
+ old_prog = xchg(&port->xdp_prog, xdp->prog);
+ if (old_prog)
+ bpf_prog_put(old_prog);
+
+ return 0;
+}
+
+int lan966x_xdp(struct net_device *dev, struct netdev_bpf *xdp)
+{
+ switch (xdp->command) {
+ case XDP_SETUP_PROG:
+ return lan966x_xdp_setup(dev, xdp);
+ default:
+ return -EINVAL;
+ }
+}
+
+int lan966x_xdp_run(struct lan966x_port *port, struct page *page, u32 data_len)
+{
+ struct bpf_prog *xdp_prog = port->xdp_prog;
+ struct lan966x *lan966x = port->lan966x;
+ struct xdp_buff xdp;
+ u32 act;
+
+ xdp_init_buff(&xdp, PAGE_SIZE << lan966x->rx.page_order,
+ &port->xdp_rxq);
+ xdp_prepare_buff(&xdp, page_address(page), IFH_LEN_BYTES,
+ data_len - IFH_LEN_BYTES, false);
+ act = bpf_prog_run_xdp(xdp_prog, &xdp);
+ switch (act) {
+ case XDP_PASS:
+ return FDMA_PASS;
+ default:
+ bpf_warn_invalid_xdp_action(port->dev, xdp_prog, act);
+ fallthrough;
+ case XDP_ABORTED:
+ trace_xdp_exception(port->dev, xdp_prog, act);
+ fallthrough;
+ case XDP_DROP:
+ return FDMA_DROP;
+ }
+}
+
+int lan966x_xdp_port_init(struct lan966x_port *port)
+{
+ struct lan966x *lan966x = port->lan966x;
+
+ return xdp_rxq_info_reg(&port->xdp_rxq, port->dev, 0,
+ lan966x->napi.napi_id);
+}
+
+void lan966x_xdp_port_deinit(struct lan966x_port *port)
+{
+ if (xdp_rxq_info_is_reg(&port->xdp_rxq))
+ xdp_rxq_info_unreg(&port->xdp_rxq);
+}