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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9403c158b8
The current procedure for installing a multicast address is hardcoded for IPv4. But, in the ocelot hardware, there are 3 different procedures for IPv4, IPv6 and for regular L2 multicast. For IPv6 (33-33-xx-xx-xx-xx), it's the same as for IPv4 (01-00-5e-xx-xx-xx), except that the destination port mask is stuffed into first 2 bytes of the MAC address except into first 3 bytes. For plain Ethernet multicast, there's no port-in-address stuffing going on, instead the DEST_IDX (pointer to PGID) is used there, just as for unicast. So we have to use one of the nonreserved multicast PGIDs that the hardware has allocated for this purpose. This patch classifies the type of multicast address based on its first bytes, then redirects to one of the 3 different hardware procedures. Note that this gives us a really better way of redirecting PTP frames sent at 01-1b-19-00-00-00 to the CPU. Previously, Yangbo Lu tried to add a trapping rule for PTP EtherType but got a lot of pushback: https://patchwork.ozlabs.org/project/netdev/patch/20190813025214.18601-5-yangbo.lu@nxp.com/ But right now, that isn't needed at all. The application stack (ptp4l) does this for the PTP multicast addresses it's interested in (which are configurable, and include 01-1b-19-00-00-00): memset(&mreq, 0, sizeof(mreq)); mreq.mr_ifindex = index; mreq.mr_type = PACKET_MR_MULTICAST; mreq.mr_alen = MAC_LEN; memcpy(mreq.mr_address, addr1, MAC_LEN); err1 = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq)); Into the kernel, this translates into a dev_mc_add on the switch network interfaces, and our drivers know that it means they should translate it into a host MDB address (make the CPU port be the destination). Previously, this was broken because all mdb addresses were treated as IPv4 (which 01-1b-19-00-00-00 obviously is not). Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
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/*
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* Microsemi Ocelot Switch driver
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*
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* Copyright (c) 2017 Microsemi Corporation
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*/
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#ifndef _MSCC_OCELOT_H_
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#define _MSCC_OCELOT_H_
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#include <linux/bitops.h>
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#include <linux/etherdevice.h>
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#include <linux/if_vlan.h>
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#include <linux/net_tstamp.h>
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#include <linux/phy.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <soc/mscc/ocelot_qsys.h>
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#include <soc/mscc/ocelot_sys.h>
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#include <soc/mscc/ocelot_dev.h>
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#include <soc/mscc/ocelot_ana.h>
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#include <soc/mscc/ocelot_ptp.h>
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#include <soc/mscc/ocelot.h>
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#include "ocelot_rew.h"
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#include "ocelot_qs.h"
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#define OCELOT_BUFFER_CELL_SZ 60
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#define OCELOT_STATS_CHECK_DELAY (2 * HZ)
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#define OCELOT_PTP_QUEUE_SZ 128
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struct frame_info {
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u32 len;
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u16 port;
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u16 vid;
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u8 tag_type;
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u16 rew_op;
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u32 timestamp; /* rew_val */
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};
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struct ocelot_multicast {
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struct list_head list;
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unsigned char addr[ETH_ALEN];
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u16 vid;
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u16 ports;
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int pgid;
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};
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struct ocelot_port_tc {
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bool block_shared;
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unsigned long offload_cnt;
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unsigned long police_id;
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};
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struct ocelot_port_private {
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struct ocelot_port port;
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struct net_device *dev;
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struct phy_device *phy;
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u8 chip_port;
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struct phy *serdes;
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struct ocelot_port_tc tc;
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};
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struct ocelot_dump_ctx {
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struct net_device *dev;
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struct sk_buff *skb;
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struct netlink_callback *cb;
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int idx;
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};
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/* MAC table entry types.
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* ENTRYTYPE_NORMAL is subject to aging.
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* ENTRYTYPE_LOCKED is not subject to aging.
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* ENTRYTYPE_MACv4 is not subject to aging. For IPv4 multicast.
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* ENTRYTYPE_MACv6 is not subject to aging. For IPv6 multicast.
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*/
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enum macaccess_entry_type {
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ENTRYTYPE_NORMAL = 0,
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ENTRYTYPE_LOCKED,
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ENTRYTYPE_MACv4,
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ENTRYTYPE_MACv6,
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};
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int ocelot_port_fdb_do_dump(const unsigned char *addr, u16 vid,
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bool is_static, void *data);
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int ocelot_mact_learn(struct ocelot *ocelot, int port,
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const unsigned char mac[ETH_ALEN],
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unsigned int vid, enum macaccess_entry_type type);
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int ocelot_mact_forget(struct ocelot *ocelot,
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const unsigned char mac[ETH_ALEN], unsigned int vid);
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int ocelot_port_lag_join(struct ocelot *ocelot, int port,
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struct net_device *bond);
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void ocelot_port_lag_leave(struct ocelot *ocelot, int port,
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struct net_device *bond);
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u32 ocelot_port_readl(struct ocelot_port *port, u32 reg);
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void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg);
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#define ocelot_field_write(ocelot, reg, val) regmap_field_write((ocelot)->regfields[(reg)], (val))
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#define ocelot_field_read(ocelot, reg, val) regmap_field_read((ocelot)->regfields[(reg)], (val))
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int ocelot_probe_port(struct ocelot *ocelot, u8 port,
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void __iomem *regs,
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struct phy_device *phy);
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void ocelot_set_cpu_port(struct ocelot *ocelot, int cpu,
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enum ocelot_tag_prefix injection,
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enum ocelot_tag_prefix extraction);
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extern struct notifier_block ocelot_netdevice_nb;
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extern struct notifier_block ocelot_switchdev_nb;
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extern struct notifier_block ocelot_switchdev_blocking_nb;
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#define ocelot_field_write(ocelot, reg, val) regmap_field_write((ocelot)->regfields[(reg)], (val))
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#define ocelot_field_read(ocelot, reg, val) regmap_field_read((ocelot)->regfields[(reg)], (val))
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#endif
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