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![Horatiu Vultur](/assets/img/avatar_default.png)
Implement functions 'port_mrp_add', 'port_mrp_del', 'port_mrp_add_ring_role' and 'port_mrp_del_ring_role' to call the mrp functions from ocelot. Also all MRP frames that arrive to CPU on queue number OCELOT_MRP_CPUQ will be forward by the SW. Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
199 lines
5.9 KiB
C
199 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright 2019 NXP Semiconductors
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*/
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#include <linux/dsa/ocelot.h>
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#include <soc/mscc/ocelot.h>
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#include "dsa_priv.h"
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static void ocelot_xmit_ptp(struct dsa_port *dp, void *injection,
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struct sk_buff *clone)
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{
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struct ocelot *ocelot = dp->ds->priv;
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struct ocelot_port *ocelot_port;
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u64 rew_op;
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ocelot_port = ocelot->ports[dp->index];
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rew_op = ocelot_port->ptp_cmd;
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/* Retrieve timestamp ID populated inside skb->cb[0] of the
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* clone by ocelot_port_add_txtstamp_skb
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*/
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if (ocelot_port->ptp_cmd == IFH_REW_OP_TWO_STEP_PTP)
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rew_op |= clone->cb[0] << 3;
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ocelot_ifh_set_rew_op(injection, rew_op);
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}
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static void ocelot_xmit_common(struct sk_buff *skb, struct net_device *netdev,
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__be32 ifh_prefix, void **ifh)
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{
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struct dsa_port *dp = dsa_slave_to_port(netdev);
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struct sk_buff *clone = DSA_SKB_CB(skb)->clone;
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struct dsa_switch *ds = dp->ds;
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void *injection;
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__be32 *prefix;
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injection = skb_push(skb, OCELOT_TAG_LEN);
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prefix = skb_push(skb, OCELOT_SHORT_PREFIX_LEN);
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*prefix = ifh_prefix;
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memset(injection, 0, OCELOT_TAG_LEN);
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ocelot_ifh_set_bypass(injection, 1);
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ocelot_ifh_set_src(injection, ds->num_ports);
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ocelot_ifh_set_qos_class(injection, skb->priority);
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/* TX timestamping was requested */
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if (clone)
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ocelot_xmit_ptp(dp, injection, clone);
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*ifh = injection;
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}
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static struct sk_buff *ocelot_xmit(struct sk_buff *skb,
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struct net_device *netdev)
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{
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struct dsa_port *dp = dsa_slave_to_port(netdev);
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void *injection;
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ocelot_xmit_common(skb, netdev, cpu_to_be32(0x8880000a), &injection);
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ocelot_ifh_set_dest(injection, BIT_ULL(dp->index));
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return skb;
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}
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static struct sk_buff *seville_xmit(struct sk_buff *skb,
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struct net_device *netdev)
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{
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struct dsa_port *dp = dsa_slave_to_port(netdev);
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void *injection;
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ocelot_xmit_common(skb, netdev, cpu_to_be32(0x88800005), &injection);
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seville_ifh_set_dest(injection, BIT_ULL(dp->index));
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return skb;
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}
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static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
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struct net_device *netdev,
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struct packet_type *pt)
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{
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u64 src_port, qos_class;
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u64 vlan_tci, tag_type;
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u8 *start = skb->data;
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struct dsa_port *dp;
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u8 *extraction;
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u16 vlan_tpid;
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u64 cpuq;
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/* Revert skb->data by the amount consumed by the DSA master,
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* so it points to the beginning of the frame.
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*/
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skb_push(skb, ETH_HLEN);
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/* We don't care about the short prefix, it is just for easy entrance
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* into the DSA master's RX filter. Discard it now by moving it into
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* the headroom.
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*/
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skb_pull(skb, OCELOT_SHORT_PREFIX_LEN);
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/* And skb->data now points to the extraction frame header.
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* Keep a pointer to it.
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*/
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extraction = skb->data;
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/* Now the EFH is part of the headroom as well */
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skb_pull(skb, OCELOT_TAG_LEN);
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/* Reset the pointer to the real MAC header */
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skb_reset_mac_header(skb);
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skb_reset_mac_len(skb);
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/* And move skb->data to the correct location again */
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skb_pull(skb, ETH_HLEN);
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/* Remove from inet csum the extraction header */
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skb_postpull_rcsum(skb, start, OCELOT_TOTAL_TAG_LEN);
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ocelot_xfh_get_src_port(extraction, &src_port);
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ocelot_xfh_get_qos_class(extraction, &qos_class);
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ocelot_xfh_get_tag_type(extraction, &tag_type);
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ocelot_xfh_get_vlan_tci(extraction, &vlan_tci);
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ocelot_xfh_get_cpuq(extraction, &cpuq);
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skb->dev = dsa_master_find_slave(netdev, 0, src_port);
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if (!skb->dev)
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/* The switch will reflect back some frames sent through
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* sockets opened on the bare DSA master. These will come back
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* with src_port equal to the index of the CPU port, for which
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* there is no slave registered. So don't print any error
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* message here (ignore and drop those frames).
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*/
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return NULL;
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skb->offload_fwd_mark = 1;
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skb->priority = qos_class;
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#if IS_ENABLED(CONFIG_BRIDGE_MRP)
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if (eth_hdr(skb)->h_proto == cpu_to_be16(ETH_P_MRP) &&
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cpuq & BIT(OCELOT_MRP_CPUQ))
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skb->offload_fwd_mark = 0;
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#endif
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/* Ocelot switches copy frames unmodified to the CPU. However, it is
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* possible for the user to request a VLAN modification through
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* VCAP_IS1_ACT_VID_REPLACE_ENA. In this case, what will happen is that
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* the VLAN ID field from the Extraction Header gets updated, but the
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* 802.1Q header does not (the classified VLAN only becomes visible on
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* egress through the "port tag" of front-panel ports).
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* So, for traffic extracted by the CPU, we want to pick up the
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* classified VLAN and manually replace the existing 802.1Q header from
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* the packet with it, so that the operating system is always up to
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* date with the result of tc-vlan actions.
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* NOTE: In VLAN-unaware mode, we don't want to do that, we want the
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* frame to remain unmodified, because the classified VLAN is always
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* equal to the pvid of the ingress port and should not be used for
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* processing.
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*/
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dp = dsa_slave_to_port(skb->dev);
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vlan_tpid = tag_type ? ETH_P_8021AD : ETH_P_8021Q;
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if (dsa_port_is_vlan_filtering(dp) &&
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eth_hdr(skb)->h_proto == htons(vlan_tpid)) {
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u16 dummy_vlan_tci;
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skb_push_rcsum(skb, ETH_HLEN);
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__skb_vlan_pop(skb, &dummy_vlan_tci);
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skb_pull_rcsum(skb, ETH_HLEN);
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__vlan_hwaccel_put_tag(skb, htons(vlan_tpid), vlan_tci);
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}
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return skb;
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}
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static const struct dsa_device_ops ocelot_netdev_ops = {
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.name = "ocelot",
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.proto = DSA_TAG_PROTO_OCELOT,
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.xmit = ocelot_xmit,
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.rcv = ocelot_rcv,
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.overhead = OCELOT_TOTAL_TAG_LEN,
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.promisc_on_master = true,
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};
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DSA_TAG_DRIVER(ocelot_netdev_ops);
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MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_OCELOT);
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static const struct dsa_device_ops seville_netdev_ops = {
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.name = "seville",
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.proto = DSA_TAG_PROTO_SEVILLE,
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.xmit = seville_xmit,
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.rcv = ocelot_rcv,
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.overhead = OCELOT_TOTAL_TAG_LEN,
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.promisc_on_master = true,
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};
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DSA_TAG_DRIVER(seville_netdev_ops);
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MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_SEVILLE);
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static struct dsa_tag_driver *ocelot_tag_driver_array[] = {
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&DSA_TAG_DRIVER_NAME(ocelot_netdev_ops),
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&DSA_TAG_DRIVER_NAME(seville_netdev_ops),
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};
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module_dsa_tag_drivers(ocelot_tag_driver_array);
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MODULE_LICENSE("GPL v2");
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