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linux-zen-desktop/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c

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Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#include <linux/if_bridge.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/refcount.h>
#include <linux/rtnetlink.h>
#include <linux/workqueue.h>
#include <net/arp.h>
#include <net/gre.h>
#include <net/lag.h>
#include <net/ndisc.h>
#include <net/ip6_tunnel.h>
#include "spectrum.h"
#include "spectrum_ipip.h"
#include "spectrum_span.h"
#include "spectrum_switchdev.h"
struct mlxsw_sp_span {
struct work_struct work;
struct mlxsw_sp *mlxsw_sp;
const struct mlxsw_sp_span_trigger_ops **span_trigger_ops_arr;
const struct mlxsw_sp_span_entry_ops **span_entry_ops_arr;
size_t span_entry_ops_arr_size;
struct list_head analyzed_ports_list;
struct mutex analyzed_ports_lock; /* Protects analyzed_ports_list */
struct list_head trigger_entries_list;
u16 policer_id_base;
refcount_t policer_id_base_ref_count;
atomic_t active_entries_count;
int entries_count;
struct mlxsw_sp_span_entry entries[];
};
struct mlxsw_sp_span_analyzed_port {
struct list_head list; /* Member of analyzed_ports_list */
refcount_t ref_count;
u16 local_port;
bool ingress;
};
struct mlxsw_sp_span_trigger_entry {
struct list_head list; /* Member of trigger_entries_list */
struct mlxsw_sp_span *span;
const struct mlxsw_sp_span_trigger_ops *ops;
refcount_t ref_count;
u16 local_port;
enum mlxsw_sp_span_trigger trigger;
struct mlxsw_sp_span_trigger_parms parms;
};
enum mlxsw_sp_span_trigger_type {
MLXSW_SP_SPAN_TRIGGER_TYPE_PORT,
MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL,
};
struct mlxsw_sp_span_trigger_ops {
int (*bind)(struct mlxsw_sp_span_trigger_entry *trigger_entry);
void (*unbind)(struct mlxsw_sp_span_trigger_entry *trigger_entry);
bool (*matches)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port);
int (*enable)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port, u8 tc);
void (*disable)(struct mlxsw_sp_span_trigger_entry *trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port, u8 tc);
};
static void mlxsw_sp_span_respin_work(struct work_struct *work);
static u64 mlxsw_sp_span_occ_get(void *priv)
{
const struct mlxsw_sp *mlxsw_sp = priv;
return atomic_read(&mlxsw_sp->span->active_entries_count);
}
int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
struct mlxsw_sp_span *span;
int i, entries_count, err;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_SPAN))
return -EIO;
entries_count = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_SPAN);
span = kzalloc(struct_size(span, entries, entries_count), GFP_KERNEL);
if (!span)
return -ENOMEM;
refcount_set(&span->policer_id_base_ref_count, 0);
span->entries_count = entries_count;
atomic_set(&span->active_entries_count, 0);
mutex_init(&span->analyzed_ports_lock);
INIT_LIST_HEAD(&span->analyzed_ports_list);
INIT_LIST_HEAD(&span->trigger_entries_list);
span->mlxsw_sp = mlxsw_sp;
mlxsw_sp->span = span;
for (i = 0; i < mlxsw_sp->span->entries_count; i++)
mlxsw_sp->span->entries[i].id = i;
err = mlxsw_sp->span_ops->init(mlxsw_sp);
if (err)
goto err_init;
devl_resource_occ_get_register(devlink, MLXSW_SP_RESOURCE_SPAN,
mlxsw_sp_span_occ_get, mlxsw_sp);
INIT_WORK(&span->work, mlxsw_sp_span_respin_work);
return 0;
err_init:
mutex_destroy(&mlxsw_sp->span->analyzed_ports_lock);
kfree(mlxsw_sp->span);
return err;
}
void mlxsw_sp_span_fini(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
cancel_work_sync(&mlxsw_sp->span->work);
devl_resource_occ_get_unregister(devlink, MLXSW_SP_RESOURCE_SPAN);
WARN_ON_ONCE(!list_empty(&mlxsw_sp->span->trigger_entries_list));
WARN_ON_ONCE(!list_empty(&mlxsw_sp->span->analyzed_ports_list));
mutex_destroy(&mlxsw_sp->span->analyzed_ports_lock);
kfree(mlxsw_sp->span);
}
static bool mlxsw_sp1_span_cpu_can_handle(const struct net_device *dev)
{
return !dev;
}
static int mlxsw_sp1_span_entry_cpu_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
return -EOPNOTSUPP;
}
static int
mlxsw_sp1_span_entry_cpu_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
return -EOPNOTSUPP;
}
static void
mlxsw_sp1_span_entry_cpu_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
}
static const
struct mlxsw_sp_span_entry_ops mlxsw_sp1_span_entry_ops_cpu = {
.is_static = true,
.can_handle = mlxsw_sp1_span_cpu_can_handle,
.parms_set = mlxsw_sp1_span_entry_cpu_parms,
.configure = mlxsw_sp1_span_entry_cpu_configure,
.deconfigure = mlxsw_sp1_span_entry_cpu_deconfigure,
};
static int
mlxsw_sp_span_entry_phys_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
sparmsp->dest_port = netdev_priv(to_dev);
return 0;
}
static int
mlxsw_sp_span_entry_phys_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
struct mlxsw_sp_port *dest_port = sparms.dest_port;
struct mlxsw_sp *mlxsw_sp = dest_port->mlxsw_sp;
u16 local_port = dest_port->local_port;
char mpat_pl[MLXSW_REG_MPAT_LEN];
int pa_id = span_entry->id;
/* Create a new port analayzer entry for local_port. */
mlxsw_reg_mpat_pack(mpat_pl, pa_id, local_port, true,
MLXSW_REG_MPAT_SPAN_TYPE_LOCAL_ETH);
mlxsw_reg_mpat_session_id_set(mpat_pl, sparms.session_id);
mlxsw_reg_mpat_pide_set(mpat_pl, sparms.policer_enable);
mlxsw_reg_mpat_pid_set(mpat_pl, sparms.policer_id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
}
static void
mlxsw_sp_span_entry_deconfigure_common(struct mlxsw_sp_span_entry *span_entry,
enum mlxsw_reg_mpat_span_type span_type)
{
struct mlxsw_sp_port *dest_port = span_entry->parms.dest_port;
struct mlxsw_sp *mlxsw_sp = dest_port->mlxsw_sp;
u16 local_port = dest_port->local_port;
char mpat_pl[MLXSW_REG_MPAT_LEN];
int pa_id = span_entry->id;
mlxsw_reg_mpat_pack(mpat_pl, pa_id, local_port, false, span_type);
mlxsw_reg_mpat_session_id_set(mpat_pl, span_entry->parms.session_id);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
}
static void
mlxsw_sp_span_entry_phys_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
mlxsw_sp_span_entry_deconfigure_common(span_entry,
MLXSW_REG_MPAT_SPAN_TYPE_LOCAL_ETH);
}
static const
struct mlxsw_sp_span_entry_ops mlxsw_sp_span_entry_ops_phys = {
.is_static = true,
.can_handle = mlxsw_sp_port_dev_check,
.parms_set = mlxsw_sp_span_entry_phys_parms,
.configure = mlxsw_sp_span_entry_phys_configure,
.deconfigure = mlxsw_sp_span_entry_phys_deconfigure,
};
static int mlxsw_sp_span_dmac(struct neigh_table *tbl,
const void *pkey,
struct net_device *dev,
unsigned char dmac[ETH_ALEN])
{
struct neighbour *neigh = neigh_lookup(tbl, pkey, dev);
int err = 0;
if (!neigh) {
neigh = neigh_create(tbl, pkey, dev);
if (IS_ERR(neigh))
return PTR_ERR(neigh);
}
neigh_event_send(neigh, NULL);
read_lock_bh(&neigh->lock);
if ((neigh->nud_state & NUD_VALID) && !neigh->dead)
memcpy(dmac, neigh->ha, ETH_ALEN);
else
err = -ENOENT;
read_unlock_bh(&neigh->lock);
neigh_release(neigh);
return err;
}
static int
mlxsw_sp_span_entry_unoffloadable(struct mlxsw_sp_span_parms *sparmsp)
{
sparmsp->dest_port = NULL;
return 0;
}
static struct net_device *
mlxsw_sp_span_entry_bridge_8021q(const struct net_device *br_dev,
unsigned char *dmac,
u16 *p_vid)
{
struct bridge_vlan_info vinfo;
struct net_device *edev;
u16 vid = *p_vid;
if (!vid && WARN_ON(br_vlan_get_pvid(br_dev, &vid)))
return NULL;
if (!vid || br_vlan_get_info(br_dev, vid, &vinfo) ||
!(vinfo.flags & BRIDGE_VLAN_INFO_BRENTRY))
return NULL;
edev = br_fdb_find_port(br_dev, dmac, vid);
if (!edev)
return NULL;
if (br_vlan_get_info(edev, vid, &vinfo))
return NULL;
if (vinfo.flags & BRIDGE_VLAN_INFO_UNTAGGED)
*p_vid = 0;
else
*p_vid = vid;
return edev;
}
static struct net_device *
mlxsw_sp_span_entry_bridge_8021d(const struct net_device *br_dev,
unsigned char *dmac)
{
return br_fdb_find_port(br_dev, dmac, 0);
}
static struct net_device *
mlxsw_sp_span_entry_bridge(const struct net_device *br_dev,
unsigned char dmac[ETH_ALEN],
u16 *p_vid)
{
struct mlxsw_sp_bridge_port *bridge_port;
enum mlxsw_reg_spms_state spms_state;
struct net_device *dev = NULL;
struct mlxsw_sp_port *port;
u8 stp_state;
if (br_vlan_enabled(br_dev))
dev = mlxsw_sp_span_entry_bridge_8021q(br_dev, dmac, p_vid);
else if (!*p_vid)
dev = mlxsw_sp_span_entry_bridge_8021d(br_dev, dmac);
if (!dev)
return NULL;
port = mlxsw_sp_port_dev_lower_find(dev);
if (!port)
return NULL;
bridge_port = mlxsw_sp_bridge_port_find(port->mlxsw_sp->bridge, dev);
if (!bridge_port)
return NULL;
stp_state = mlxsw_sp_bridge_port_stp_state(bridge_port);
spms_state = mlxsw_sp_stp_spms_state(stp_state);
if (spms_state != MLXSW_REG_SPMS_STATE_FORWARDING)
return NULL;
return dev;
}
static struct net_device *
mlxsw_sp_span_entry_vlan(const struct net_device *vlan_dev,
u16 *p_vid)
{
*p_vid = vlan_dev_vlan_id(vlan_dev);
return vlan_dev_real_dev(vlan_dev);
}
static struct net_device *
mlxsw_sp_span_entry_lag(struct net_device *lag_dev)
{
struct net_device *dev;
struct list_head *iter;
netdev_for_each_lower_dev(lag_dev, dev, iter)
if (netif_carrier_ok(dev) &&
net_lag_port_dev_txable(dev) &&
mlxsw_sp_port_dev_check(dev))
return dev;
return NULL;
}
static __maybe_unused int
mlxsw_sp_span_entry_tunnel_parms_common(struct net_device *edev,
union mlxsw_sp_l3addr saddr,
union mlxsw_sp_l3addr daddr,
union mlxsw_sp_l3addr gw,
__u8 ttl,
struct neigh_table *tbl,
struct mlxsw_sp_span_parms *sparmsp)
{
unsigned char dmac[ETH_ALEN];
u16 vid = 0;
if (mlxsw_sp_l3addr_is_zero(gw))
gw = daddr;
if (!edev || mlxsw_sp_span_dmac(tbl, &gw, edev, dmac))
goto unoffloadable;
if (is_vlan_dev(edev))
edev = mlxsw_sp_span_entry_vlan(edev, &vid);
if (netif_is_bridge_master(edev)) {
edev = mlxsw_sp_span_entry_bridge(edev, dmac, &vid);
if (!edev)
goto unoffloadable;
}
if (is_vlan_dev(edev)) {
if (vid || !(edev->flags & IFF_UP))
goto unoffloadable;
edev = mlxsw_sp_span_entry_vlan(edev, &vid);
}
if (netif_is_lag_master(edev)) {
if (!(edev->flags & IFF_UP))
goto unoffloadable;
edev = mlxsw_sp_span_entry_lag(edev);
if (!edev)
goto unoffloadable;
}
if (!mlxsw_sp_port_dev_check(edev))
goto unoffloadable;
sparmsp->dest_port = netdev_priv(edev);
sparmsp->ttl = ttl;
memcpy(sparmsp->dmac, dmac, ETH_ALEN);
memcpy(sparmsp->smac, edev->dev_addr, ETH_ALEN);
sparmsp->saddr = saddr;
sparmsp->daddr = daddr;
sparmsp->vid = vid;
return 0;
unoffloadable:
return mlxsw_sp_span_entry_unoffloadable(sparmsp);
}
#if IS_ENABLED(CONFIG_NET_IPGRE)
static struct net_device *
mlxsw_sp_span_gretap4_route(const struct net_device *to_dev,
__be32 *saddrp, __be32 *daddrp)
{
struct ip_tunnel *tun = netdev_priv(to_dev);
struct net_device *dev = NULL;
struct ip_tunnel_parm parms;
struct rtable *rt = NULL;
struct flowi4 fl4;
/* We assume "dev" stays valid after rt is put. */
ASSERT_RTNL();
parms = mlxsw_sp_ipip_netdev_parms4(to_dev);
ip_tunnel_init_flow(&fl4, parms.iph.protocol, *daddrp, *saddrp,
0, 0, dev_net(to_dev), parms.link, tun->fwmark, 0,
0);
rt = ip_route_output_key(tun->net, &fl4);
if (IS_ERR(rt))
return NULL;
if (rt->rt_type != RTN_UNICAST)
goto out;
dev = rt->dst.dev;
*saddrp = fl4.saddr;
if (rt->rt_gw_family == AF_INET)
*daddrp = rt->rt_gw4;
/* can not offload if route has an IPv6 gateway */
else if (rt->rt_gw_family == AF_INET6)
dev = NULL;
out:
ip_rt_put(rt);
return dev;
}
static int
mlxsw_sp_span_entry_gretap4_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
struct ip_tunnel_parm tparm = mlxsw_sp_ipip_netdev_parms4(to_dev);
union mlxsw_sp_l3addr saddr = { .addr4 = tparm.iph.saddr };
union mlxsw_sp_l3addr daddr = { .addr4 = tparm.iph.daddr };
bool inherit_tos = tparm.iph.tos & 0x1;
bool inherit_ttl = !tparm.iph.ttl;
union mlxsw_sp_l3addr gw = daddr;
struct net_device *l3edev;
if (!(to_dev->flags & IFF_UP) ||
/* Reject tunnels with GRE keys, checksums, etc. */
tparm.i_flags || tparm.o_flags ||
/* Require a fixed TTL and a TOS copied from the mirrored packet. */
inherit_ttl || !inherit_tos ||
/* A destination address may not be "any". */
mlxsw_sp_l3addr_is_zero(daddr))
return mlxsw_sp_span_entry_unoffloadable(sparmsp);
l3edev = mlxsw_sp_span_gretap4_route(to_dev, &saddr.addr4, &gw.addr4);
return mlxsw_sp_span_entry_tunnel_parms_common(l3edev, saddr, daddr, gw,
tparm.iph.ttl,
&arp_tbl, sparmsp);
}
static int
mlxsw_sp_span_entry_gretap4_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
struct mlxsw_sp_port *dest_port = sparms.dest_port;
struct mlxsw_sp *mlxsw_sp = dest_port->mlxsw_sp;
u16 local_port = dest_port->local_port;
char mpat_pl[MLXSW_REG_MPAT_LEN];
int pa_id = span_entry->id;
/* Create a new port analayzer entry for local_port. */
mlxsw_reg_mpat_pack(mpat_pl, pa_id, local_port, true,
MLXSW_REG_MPAT_SPAN_TYPE_REMOTE_ETH_L3);
mlxsw_reg_mpat_pide_set(mpat_pl, sparms.policer_enable);
mlxsw_reg_mpat_pid_set(mpat_pl, sparms.policer_id);
mlxsw_reg_mpat_eth_rspan_pack(mpat_pl, sparms.vid);
mlxsw_reg_mpat_eth_rspan_l2_pack(mpat_pl,
MLXSW_REG_MPAT_ETH_RSPAN_VERSION_NO_HEADER,
sparms.dmac, !!sparms.vid);
mlxsw_reg_mpat_eth_rspan_l3_ipv4_pack(mpat_pl,
sparms.ttl, sparms.smac,
be32_to_cpu(sparms.saddr.addr4),
be32_to_cpu(sparms.daddr.addr4));
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
}
static void
mlxsw_sp_span_entry_gretap4_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
mlxsw_sp_span_entry_deconfigure_common(span_entry,
MLXSW_REG_MPAT_SPAN_TYPE_REMOTE_ETH_L3);
}
static const struct mlxsw_sp_span_entry_ops mlxsw_sp_span_entry_ops_gretap4 = {
.can_handle = netif_is_gretap,
.parms_set = mlxsw_sp_span_entry_gretap4_parms,
.configure = mlxsw_sp_span_entry_gretap4_configure,
.deconfigure = mlxsw_sp_span_entry_gretap4_deconfigure,
};
#endif
#if IS_ENABLED(CONFIG_IPV6_GRE)
static struct net_device *
mlxsw_sp_span_gretap6_route(const struct net_device *to_dev,
struct in6_addr *saddrp,
struct in6_addr *daddrp)
{
struct ip6_tnl *t = netdev_priv(to_dev);
struct flowi6 fl6 = t->fl.u.ip6;
struct net_device *dev = NULL;
struct dst_entry *dst;
struct rt6_info *rt6;
/* We assume "dev" stays valid after dst is released. */
ASSERT_RTNL();
fl6.flowi6_mark = t->parms.fwmark;
if (!ip6_tnl_xmit_ctl(t, &fl6.saddr, &fl6.daddr))
return NULL;
dst = ip6_route_output(t->net, NULL, &fl6);
if (!dst || dst->error)
goto out;
rt6 = container_of(dst, struct rt6_info, dst);
dev = dst->dev;
*saddrp = fl6.saddr;
*daddrp = rt6->rt6i_gateway;
out:
dst_release(dst);
return dev;
}
static int
mlxsw_sp_span_entry_gretap6_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
struct __ip6_tnl_parm tparm = mlxsw_sp_ipip_netdev_parms6(to_dev);
bool inherit_tos = tparm.flags & IP6_TNL_F_USE_ORIG_TCLASS;
union mlxsw_sp_l3addr saddr = { .addr6 = tparm.laddr };
union mlxsw_sp_l3addr daddr = { .addr6 = tparm.raddr };
bool inherit_ttl = !tparm.hop_limit;
union mlxsw_sp_l3addr gw = daddr;
struct net_device *l3edev;
if (!(to_dev->flags & IFF_UP) ||
/* Reject tunnels with GRE keys, checksums, etc. */
tparm.i_flags || tparm.o_flags ||
/* Require a fixed TTL and a TOS copied from the mirrored packet. */
inherit_ttl || !inherit_tos ||
/* A destination address may not be "any". */
mlxsw_sp_l3addr_is_zero(daddr))
return mlxsw_sp_span_entry_unoffloadable(sparmsp);
l3edev = mlxsw_sp_span_gretap6_route(to_dev, &saddr.addr6, &gw.addr6);
return mlxsw_sp_span_entry_tunnel_parms_common(l3edev, saddr, daddr, gw,
tparm.hop_limit,
&nd_tbl, sparmsp);
}
static int
mlxsw_sp_span_entry_gretap6_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
struct mlxsw_sp_port *dest_port = sparms.dest_port;
struct mlxsw_sp *mlxsw_sp = dest_port->mlxsw_sp;
u16 local_port = dest_port->local_port;
char mpat_pl[MLXSW_REG_MPAT_LEN];
int pa_id = span_entry->id;
/* Create a new port analayzer entry for local_port. */
mlxsw_reg_mpat_pack(mpat_pl, pa_id, local_port, true,
MLXSW_REG_MPAT_SPAN_TYPE_REMOTE_ETH_L3);
mlxsw_reg_mpat_pide_set(mpat_pl, sparms.policer_enable);
mlxsw_reg_mpat_pid_set(mpat_pl, sparms.policer_id);
mlxsw_reg_mpat_eth_rspan_pack(mpat_pl, sparms.vid);
mlxsw_reg_mpat_eth_rspan_l2_pack(mpat_pl,
MLXSW_REG_MPAT_ETH_RSPAN_VERSION_NO_HEADER,
sparms.dmac, !!sparms.vid);
mlxsw_reg_mpat_eth_rspan_l3_ipv6_pack(mpat_pl, sparms.ttl, sparms.smac,
sparms.saddr.addr6,
sparms.daddr.addr6);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
}
static void
mlxsw_sp_span_entry_gretap6_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
mlxsw_sp_span_entry_deconfigure_common(span_entry,
MLXSW_REG_MPAT_SPAN_TYPE_REMOTE_ETH_L3);
}
static const
struct mlxsw_sp_span_entry_ops mlxsw_sp_span_entry_ops_gretap6 = {
.can_handle = netif_is_ip6gretap,
.parms_set = mlxsw_sp_span_entry_gretap6_parms,
.configure = mlxsw_sp_span_entry_gretap6_configure,
.deconfigure = mlxsw_sp_span_entry_gretap6_deconfigure,
};
#endif
static bool
mlxsw_sp_span_vlan_can_handle(const struct net_device *dev)
{
return is_vlan_dev(dev) &&
mlxsw_sp_port_dev_check(vlan_dev_real_dev(dev));
}
static int
mlxsw_sp_span_entry_vlan_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
struct net_device *real_dev;
u16 vid;
if (!(to_dev->flags & IFF_UP))
return mlxsw_sp_span_entry_unoffloadable(sparmsp);
real_dev = mlxsw_sp_span_entry_vlan(to_dev, &vid);
sparmsp->dest_port = netdev_priv(real_dev);
sparmsp->vid = vid;
return 0;
}
static int
mlxsw_sp_span_entry_vlan_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
struct mlxsw_sp_port *dest_port = sparms.dest_port;
struct mlxsw_sp *mlxsw_sp = dest_port->mlxsw_sp;
u16 local_port = dest_port->local_port;
char mpat_pl[MLXSW_REG_MPAT_LEN];
int pa_id = span_entry->id;
mlxsw_reg_mpat_pack(mpat_pl, pa_id, local_port, true,
MLXSW_REG_MPAT_SPAN_TYPE_REMOTE_ETH);
mlxsw_reg_mpat_pide_set(mpat_pl, sparms.policer_enable);
mlxsw_reg_mpat_pid_set(mpat_pl, sparms.policer_id);
mlxsw_reg_mpat_eth_rspan_pack(mpat_pl, sparms.vid);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpat), mpat_pl);
}
static void
mlxsw_sp_span_entry_vlan_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
mlxsw_sp_span_entry_deconfigure_common(span_entry,
MLXSW_REG_MPAT_SPAN_TYPE_REMOTE_ETH);
}
static const
struct mlxsw_sp_span_entry_ops mlxsw_sp_span_entry_ops_vlan = {
.can_handle = mlxsw_sp_span_vlan_can_handle,
.parms_set = mlxsw_sp_span_entry_vlan_parms,
.configure = mlxsw_sp_span_entry_vlan_configure,
.deconfigure = mlxsw_sp_span_entry_vlan_deconfigure,
};
static const
struct mlxsw_sp_span_entry_ops *mlxsw_sp1_span_entry_ops_arr[] = {
&mlxsw_sp1_span_entry_ops_cpu,
&mlxsw_sp_span_entry_ops_phys,
#if IS_ENABLED(CONFIG_NET_IPGRE)
&mlxsw_sp_span_entry_ops_gretap4,
#endif
#if IS_ENABLED(CONFIG_IPV6_GRE)
&mlxsw_sp_span_entry_ops_gretap6,
#endif
&mlxsw_sp_span_entry_ops_vlan,
};
static bool mlxsw_sp2_span_cpu_can_handle(const struct net_device *dev)
{
return !dev;
}
static int mlxsw_sp2_span_entry_cpu_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
sparmsp->dest_port = mlxsw_sp->ports[MLXSW_PORT_CPU_PORT];
return 0;
}
static int
mlxsw_sp2_span_entry_cpu_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
/* Mirroring to the CPU port is like mirroring to any other physical
* port. Its local port is used instead of that of the physical port.
*/
return mlxsw_sp_span_entry_phys_configure(span_entry, sparms);
}
static void
mlxsw_sp2_span_entry_cpu_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
enum mlxsw_reg_mpat_span_type span_type;
span_type = MLXSW_REG_MPAT_SPAN_TYPE_LOCAL_ETH;
mlxsw_sp_span_entry_deconfigure_common(span_entry, span_type);
}
static const
struct mlxsw_sp_span_entry_ops mlxsw_sp2_span_entry_ops_cpu = {
.is_static = true,
.can_handle = mlxsw_sp2_span_cpu_can_handle,
.parms_set = mlxsw_sp2_span_entry_cpu_parms,
.configure = mlxsw_sp2_span_entry_cpu_configure,
.deconfigure = mlxsw_sp2_span_entry_cpu_deconfigure,
};
static const
struct mlxsw_sp_span_entry_ops *mlxsw_sp2_span_entry_ops_arr[] = {
&mlxsw_sp2_span_entry_ops_cpu,
&mlxsw_sp_span_entry_ops_phys,
#if IS_ENABLED(CONFIG_NET_IPGRE)
&mlxsw_sp_span_entry_ops_gretap4,
#endif
#if IS_ENABLED(CONFIG_IPV6_GRE)
&mlxsw_sp_span_entry_ops_gretap6,
#endif
&mlxsw_sp_span_entry_ops_vlan,
};
static int
mlxsw_sp_span_entry_nop_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
return mlxsw_sp_span_entry_unoffloadable(sparmsp);
}
static int
mlxsw_sp_span_entry_nop_configure(struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
return 0;
}
static void
mlxsw_sp_span_entry_nop_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
}
static const struct mlxsw_sp_span_entry_ops mlxsw_sp_span_entry_ops_nop = {
.parms_set = mlxsw_sp_span_entry_nop_parms,
.configure = mlxsw_sp_span_entry_nop_configure,
.deconfigure = mlxsw_sp_span_entry_nop_deconfigure,
};
static void
mlxsw_sp_span_entry_configure(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_span_entry *span_entry,
struct mlxsw_sp_span_parms sparms)
{
int err;
if (!sparms.dest_port)
goto set_parms;
if (sparms.dest_port->mlxsw_sp != mlxsw_sp) {
dev_err(mlxsw_sp->bus_info->dev,
"Cannot mirror to a port which belongs to a different mlxsw instance\n");
sparms.dest_port = NULL;
goto set_parms;
}
err = span_entry->ops->configure(span_entry, sparms);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to offload mirror\n");
sparms.dest_port = NULL;
goto set_parms;
}
set_parms:
span_entry->parms = sparms;
}
static void
mlxsw_sp_span_entry_deconfigure(struct mlxsw_sp_span_entry *span_entry)
{
if (span_entry->parms.dest_port)
span_entry->ops->deconfigure(span_entry);
}
static int mlxsw_sp_span_policer_id_base_set(struct mlxsw_sp_span *span,
u16 policer_id)
{
struct mlxsw_sp *mlxsw_sp = span->mlxsw_sp;
u16 policer_id_base;
int err;
/* Policers set on SPAN agents must be in the range of
* `policer_id_base .. policer_id_base + max_span_agents - 1`. If the
* base is set and the new policer is not within the range, then we
* must error out.
*/
if (refcount_read(&span->policer_id_base_ref_count)) {
if (policer_id < span->policer_id_base ||
policer_id >= span->policer_id_base + span->entries_count)
return -EINVAL;
refcount_inc(&span->policer_id_base_ref_count);
return 0;
}
/* Base must be even. */
policer_id_base = policer_id % 2 == 0 ? policer_id : policer_id - 1;
err = mlxsw_sp->span_ops->policer_id_base_set(mlxsw_sp,
policer_id_base);
if (err)
return err;
span->policer_id_base = policer_id_base;
refcount_set(&span->policer_id_base_ref_count, 1);
return 0;
}
static void mlxsw_sp_span_policer_id_base_unset(struct mlxsw_sp_span *span)
{
if (refcount_dec_and_test(&span->policer_id_base_ref_count))
span->policer_id_base = 0;
}
static struct mlxsw_sp_span_entry *
mlxsw_sp_span_entry_create(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
const struct mlxsw_sp_span_entry_ops *ops,
struct mlxsw_sp_span_parms sparms)
{
struct mlxsw_sp_span_entry *span_entry = NULL;
int i;
/* find a free entry to use */
for (i = 0; i < mlxsw_sp->span->entries_count; i++) {
if (!refcount_read(&mlxsw_sp->span->entries[i].ref_count)) {
span_entry = &mlxsw_sp->span->entries[i];
break;
}
}
if (!span_entry)
return NULL;
if (sparms.policer_enable) {
int err;
err = mlxsw_sp_span_policer_id_base_set(mlxsw_sp->span,
sparms.policer_id);
if (err)
return NULL;
}
atomic_inc(&mlxsw_sp->span->active_entries_count);
span_entry->ops = ops;
refcount_set(&span_entry->ref_count, 1);
span_entry->to_dev = to_dev;
mlxsw_sp_span_entry_configure(mlxsw_sp, span_entry, sparms);
return span_entry;
}
static void mlxsw_sp_span_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_span_entry *span_entry)
{
mlxsw_sp_span_entry_deconfigure(span_entry);
atomic_dec(&mlxsw_sp->span->active_entries_count);
if (span_entry->parms.policer_enable)
mlxsw_sp_span_policer_id_base_unset(mlxsw_sp->span);
}
struct mlxsw_sp_span_entry *
mlxsw_sp_span_entry_find_by_port(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev)
{
int i;
for (i = 0; i < mlxsw_sp->span->entries_count; i++) {
struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span->entries[i];
if (refcount_read(&curr->ref_count) && curr->to_dev == to_dev)
return curr;
}
return NULL;
}
void mlxsw_sp_span_entry_invalidate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_span_entry *span_entry)
{
mlxsw_sp_span_entry_deconfigure(span_entry);
span_entry->ops = &mlxsw_sp_span_entry_ops_nop;
}
static struct mlxsw_sp_span_entry *
mlxsw_sp_span_entry_find_by_id(struct mlxsw_sp *mlxsw_sp, int span_id)
{
int i;
for (i = 0; i < mlxsw_sp->span->entries_count; i++) {
struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span->entries[i];
if (refcount_read(&curr->ref_count) && curr->id == span_id)
return curr;
}
return NULL;
}
static struct mlxsw_sp_span_entry *
mlxsw_sp_span_entry_find_by_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
const struct mlxsw_sp_span_parms *sparms)
{
int i;
for (i = 0; i < mlxsw_sp->span->entries_count; i++) {
struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span->entries[i];
if (refcount_read(&curr->ref_count) && curr->to_dev == to_dev &&
curr->parms.policer_enable == sparms->policer_enable &&
curr->parms.policer_id == sparms->policer_id &&
curr->parms.session_id == sparms->session_id)
return curr;
}
return NULL;
}
static struct mlxsw_sp_span_entry *
mlxsw_sp_span_entry_get(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
const struct mlxsw_sp_span_entry_ops *ops,
struct mlxsw_sp_span_parms sparms)
{
struct mlxsw_sp_span_entry *span_entry;
span_entry = mlxsw_sp_span_entry_find_by_parms(mlxsw_sp, to_dev,
&sparms);
if (span_entry) {
/* Already exists, just take a reference */
refcount_inc(&span_entry->ref_count);
return span_entry;
}
return mlxsw_sp_span_entry_create(mlxsw_sp, to_dev, ops, sparms);
}
static int mlxsw_sp_span_entry_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_span_entry *span_entry)
{
if (refcount_dec_and_test(&span_entry->ref_count))
mlxsw_sp_span_entry_destroy(mlxsw_sp, span_entry);
return 0;
}
static int mlxsw_sp_span_port_buffer_update(struct mlxsw_sp_port *mlxsw_sp_port, bool enable)
{
struct mlxsw_sp_hdroom hdroom;
hdroom = *mlxsw_sp_port->hdroom;
hdroom.int_buf.enable = enable;
mlxsw_sp_hdroom_bufs_reset_sizes(mlxsw_sp_port, &hdroom);
return mlxsw_sp_hdroom_configure(mlxsw_sp_port, &hdroom);
}
static int
mlxsw_sp_span_port_buffer_enable(struct mlxsw_sp_port *mlxsw_sp_port)
{
return mlxsw_sp_span_port_buffer_update(mlxsw_sp_port, true);
}
static void mlxsw_sp_span_port_buffer_disable(struct mlxsw_sp_port *mlxsw_sp_port)
{
mlxsw_sp_span_port_buffer_update(mlxsw_sp_port, false);
}
static struct mlxsw_sp_span_analyzed_port *
mlxsw_sp_span_analyzed_port_find(struct mlxsw_sp_span *span, u16 local_port,
bool ingress)
{
struct mlxsw_sp_span_analyzed_port *analyzed_port;
list_for_each_entry(analyzed_port, &span->analyzed_ports_list, list) {
if (analyzed_port->local_port == local_port &&
analyzed_port->ingress == ingress)
return analyzed_port;
}
return NULL;
}
static const struct mlxsw_sp_span_entry_ops *
mlxsw_sp_span_entry_ops(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev)
{
struct mlxsw_sp_span *span = mlxsw_sp->span;
size_t i;
for (i = 0; i < span->span_entry_ops_arr_size; ++i)
if (span->span_entry_ops_arr[i]->can_handle(to_dev))
return span->span_entry_ops_arr[i];
return NULL;
}
static void mlxsw_sp_span_respin_work(struct work_struct *work)
{
struct mlxsw_sp_span *span;
struct mlxsw_sp *mlxsw_sp;
int i, err;
span = container_of(work, struct mlxsw_sp_span, work);
mlxsw_sp = span->mlxsw_sp;
rtnl_lock();
for (i = 0; i < mlxsw_sp->span->entries_count; i++) {
struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span->entries[i];
struct mlxsw_sp_span_parms sparms = {NULL};
if (!refcount_read(&curr->ref_count))
continue;
if (curr->ops->is_static)
continue;
err = curr->ops->parms_set(mlxsw_sp, curr->to_dev, &sparms);
if (err)
continue;
if (memcmp(&sparms, &curr->parms, sizeof(sparms))) {
mlxsw_sp_span_entry_deconfigure(curr);
mlxsw_sp_span_entry_configure(mlxsw_sp, curr, sparms);
}
}
rtnl_unlock();
}
void mlxsw_sp_span_respin(struct mlxsw_sp *mlxsw_sp)
{
if (atomic_read(&mlxsw_sp->span->active_entries_count) == 0)
return;
mlxsw_core_schedule_work(&mlxsw_sp->span->work);
}
int mlxsw_sp_span_agent_get(struct mlxsw_sp *mlxsw_sp, int *p_span_id,
const struct mlxsw_sp_span_agent_parms *parms)
{
const struct net_device *to_dev = parms->to_dev;
const struct mlxsw_sp_span_entry_ops *ops;
struct mlxsw_sp_span_entry *span_entry;
struct mlxsw_sp_span_parms sparms;
int err;
ASSERT_RTNL();
ops = mlxsw_sp_span_entry_ops(mlxsw_sp, to_dev);
if (!ops) {
dev_err(mlxsw_sp->bus_info->dev, "Cannot mirror to requested destination\n");
return -EOPNOTSUPP;
}
memset(&sparms, 0, sizeof(sparms));
err = ops->parms_set(mlxsw_sp, to_dev, &sparms);
if (err)
return err;
sparms.policer_id = parms->policer_id;
sparms.policer_enable = parms->policer_enable;
sparms.session_id = parms->session_id;
span_entry = mlxsw_sp_span_entry_get(mlxsw_sp, to_dev, ops, sparms);
if (!span_entry)
return -ENOBUFS;
*p_span_id = span_entry->id;
return 0;
}
void mlxsw_sp_span_agent_put(struct mlxsw_sp *mlxsw_sp, int span_id)
{
struct mlxsw_sp_span_entry *span_entry;
ASSERT_RTNL();
span_entry = mlxsw_sp_span_entry_find_by_id(mlxsw_sp, span_id);
if (WARN_ON_ONCE(!span_entry))
return;
mlxsw_sp_span_entry_put(mlxsw_sp, span_entry);
}
static struct mlxsw_sp_span_analyzed_port *
mlxsw_sp_span_analyzed_port_create(struct mlxsw_sp_span *span,
struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
struct mlxsw_sp_span_analyzed_port *analyzed_port;
int err;
analyzed_port = kzalloc(sizeof(*analyzed_port), GFP_KERNEL);
if (!analyzed_port)
return ERR_PTR(-ENOMEM);
refcount_set(&analyzed_port->ref_count, 1);
analyzed_port->local_port = mlxsw_sp_port->local_port;
analyzed_port->ingress = ingress;
list_add_tail(&analyzed_port->list, &span->analyzed_ports_list);
/* An egress mirror buffer should be allocated on the egress port which
* does the mirroring.
*/
if (!ingress) {
err = mlxsw_sp_span_port_buffer_enable(mlxsw_sp_port);
if (err)
goto err_buffer_update;
}
return analyzed_port;
err_buffer_update:
list_del(&analyzed_port->list);
kfree(analyzed_port);
return ERR_PTR(err);
}
static void
mlxsw_sp_span_analyzed_port_destroy(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_span_analyzed_port *
analyzed_port)
{
/* Remove egress mirror buffer now that port is no longer analyzed
* at egress.
*/
if (!analyzed_port->ingress)
mlxsw_sp_span_port_buffer_disable(mlxsw_sp_port);
list_del(&analyzed_port->list);
kfree(analyzed_port);
}
int mlxsw_sp_span_analyzed_port_get(struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_span_analyzed_port *analyzed_port;
u16 local_port = mlxsw_sp_port->local_port;
int err = 0;
mutex_lock(&mlxsw_sp->span->analyzed_ports_lock);
analyzed_port = mlxsw_sp_span_analyzed_port_find(mlxsw_sp->span,
local_port, ingress);
if (analyzed_port) {
refcount_inc(&analyzed_port->ref_count);
goto out_unlock;
}
analyzed_port = mlxsw_sp_span_analyzed_port_create(mlxsw_sp->span,
mlxsw_sp_port,
ingress);
if (IS_ERR(analyzed_port))
err = PTR_ERR(analyzed_port);
out_unlock:
mutex_unlock(&mlxsw_sp->span->analyzed_ports_lock);
return err;
}
void mlxsw_sp_span_analyzed_port_put(struct mlxsw_sp_port *mlxsw_sp_port,
bool ingress)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_span_analyzed_port *analyzed_port;
u16 local_port = mlxsw_sp_port->local_port;
mutex_lock(&mlxsw_sp->span->analyzed_ports_lock);
analyzed_port = mlxsw_sp_span_analyzed_port_find(mlxsw_sp->span,
local_port, ingress);
if (WARN_ON_ONCE(!analyzed_port))
goto out_unlock;
if (!refcount_dec_and_test(&analyzed_port->ref_count))
goto out_unlock;
mlxsw_sp_span_analyzed_port_destroy(mlxsw_sp_port, analyzed_port);
out_unlock:
mutex_unlock(&mlxsw_sp->span->analyzed_ports_lock);
}
static int
__mlxsw_sp_span_trigger_port_bind(struct mlxsw_sp_span *span,
struct mlxsw_sp_span_trigger_entry *
trigger_entry, bool enable)
{
char mpar_pl[MLXSW_REG_MPAR_LEN];
enum mlxsw_reg_mpar_i_e i_e;
switch (trigger_entry->trigger) {
case MLXSW_SP_SPAN_TRIGGER_INGRESS:
i_e = MLXSW_REG_MPAR_TYPE_INGRESS;
break;
case MLXSW_SP_SPAN_TRIGGER_EGRESS:
i_e = MLXSW_REG_MPAR_TYPE_EGRESS;
break;
default:
WARN_ON_ONCE(1);
return -EINVAL;
}
if (trigger_entry->parms.probability_rate > MLXSW_REG_MPAR_RATE_MAX)
return -EINVAL;
mlxsw_reg_mpar_pack(mpar_pl, trigger_entry->local_port, i_e, enable,
trigger_entry->parms.span_id,
trigger_entry->parms.probability_rate);
return mlxsw_reg_write(span->mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
}
static int
mlxsw_sp_span_trigger_port_bind(struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
return __mlxsw_sp_span_trigger_port_bind(trigger_entry->span,
trigger_entry, true);
}
static void
mlxsw_sp_span_trigger_port_unbind(struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
__mlxsw_sp_span_trigger_port_bind(trigger_entry->span, trigger_entry,
false);
}
static bool
mlxsw_sp_span_trigger_port_matches(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port)
{
return trigger_entry->trigger == trigger &&
trigger_entry->local_port == mlxsw_sp_port->local_port;
}
static int
mlxsw_sp_span_trigger_port_enable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port, u8 tc)
{
/* Port trigger are enabled during binding. */
return 0;
}
static void
mlxsw_sp_span_trigger_port_disable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port, u8 tc)
{
}
static const struct mlxsw_sp_span_trigger_ops
mlxsw_sp_span_trigger_port_ops = {
.bind = mlxsw_sp_span_trigger_port_bind,
.unbind = mlxsw_sp_span_trigger_port_unbind,
.matches = mlxsw_sp_span_trigger_port_matches,
.enable = mlxsw_sp_span_trigger_port_enable,
.disable = mlxsw_sp_span_trigger_port_disable,
};
static int
mlxsw_sp1_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
return -EOPNOTSUPP;
}
static void
mlxsw_sp1_span_trigger_global_unbind(struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
}
static bool
mlxsw_sp1_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port)
{
WARN_ON_ONCE(1);
return false;
}
static int
mlxsw_sp1_span_trigger_global_enable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port,
u8 tc)
{
return -EOPNOTSUPP;
}
static void
mlxsw_sp1_span_trigger_global_disable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port,
u8 tc)
{
}
static const struct mlxsw_sp_span_trigger_ops
mlxsw_sp1_span_trigger_global_ops = {
.bind = mlxsw_sp1_span_trigger_global_bind,
.unbind = mlxsw_sp1_span_trigger_global_unbind,
.matches = mlxsw_sp1_span_trigger_global_matches,
.enable = mlxsw_sp1_span_trigger_global_enable,
.disable = mlxsw_sp1_span_trigger_global_disable,
};
static const struct mlxsw_sp_span_trigger_ops *
mlxsw_sp1_span_trigger_ops_arr[] = {
[MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
[MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL] =
&mlxsw_sp1_span_trigger_global_ops,
};
static int
mlxsw_sp2_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
struct mlxsw_sp *mlxsw_sp = trigger_entry->span->mlxsw_sp;
enum mlxsw_reg_mpagr_trigger trigger;
char mpagr_pl[MLXSW_REG_MPAGR_LEN];
switch (trigger_entry->trigger) {
case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
trigger = MLXSW_REG_MPAGR_TRIGGER_INGRESS_SHARED_BUFFER;
break;
case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
trigger = MLXSW_REG_MPAGR_TRIGGER_INGRESS_WRED;
break;
case MLXSW_SP_SPAN_TRIGGER_ECN:
trigger = MLXSW_REG_MPAGR_TRIGGER_EGRESS_ECN;
break;
default:
WARN_ON_ONCE(1);
return -EINVAL;
}
if (trigger_entry->parms.probability_rate > MLXSW_REG_MPAGR_RATE_MAX)
return -EINVAL;
mlxsw_reg_mpagr_pack(mpagr_pl, trigger, trigger_entry->parms.span_id,
trigger_entry->parms.probability_rate);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpagr), mpagr_pl);
}
static void
mlxsw_sp2_span_trigger_global_unbind(struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
/* There is no unbinding for global triggers. The trigger should be
* disabled on all ports by now.
*/
}
static bool
mlxsw_sp2_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port)
{
return trigger_entry->trigger == trigger;
}
static int
__mlxsw_sp2_span_trigger_global_enable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port,
u8 tc, bool enable)
{
struct mlxsw_sp *mlxsw_sp = trigger_entry->span->mlxsw_sp;
char momte_pl[MLXSW_REG_MOMTE_LEN];
enum mlxsw_reg_momte_type type;
int err;
switch (trigger_entry->trigger) {
case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
type = MLXSW_REG_MOMTE_TYPE_SHARED_BUFFER_TCLASS;
break;
case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
type = MLXSW_REG_MOMTE_TYPE_WRED;
break;
case MLXSW_SP_SPAN_TRIGGER_ECN:
type = MLXSW_REG_MOMTE_TYPE_ECN;
break;
default:
WARN_ON_ONCE(1);
return -EINVAL;
}
/* Query existing configuration in order to only change the state of
* the specified traffic class.
*/
mlxsw_reg_momte_pack(momte_pl, mlxsw_sp_port->local_port, type);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(momte), momte_pl);
if (err)
return err;
mlxsw_reg_momte_tclass_en_set(momte_pl, tc, enable);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(momte), momte_pl);
}
static int
mlxsw_sp2_span_trigger_global_enable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port,
u8 tc)
{
return __mlxsw_sp2_span_trigger_global_enable(trigger_entry,
mlxsw_sp_port, tc, true);
}
static void
mlxsw_sp2_span_trigger_global_disable(struct mlxsw_sp_span_trigger_entry *
trigger_entry,
struct mlxsw_sp_port *mlxsw_sp_port,
u8 tc)
{
__mlxsw_sp2_span_trigger_global_enable(trigger_entry, mlxsw_sp_port, tc,
false);
}
static const struct mlxsw_sp_span_trigger_ops
mlxsw_sp2_span_trigger_global_ops = {
.bind = mlxsw_sp2_span_trigger_global_bind,
.unbind = mlxsw_sp2_span_trigger_global_unbind,
.matches = mlxsw_sp2_span_trigger_global_matches,
.enable = mlxsw_sp2_span_trigger_global_enable,
.disable = mlxsw_sp2_span_trigger_global_disable,
};
static const struct mlxsw_sp_span_trigger_ops *
mlxsw_sp2_span_trigger_ops_arr[] = {
[MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
[MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL] =
&mlxsw_sp2_span_trigger_global_ops,
};
static void
mlxsw_sp_span_trigger_ops_set(struct mlxsw_sp_span_trigger_entry *trigger_entry)
{
struct mlxsw_sp_span *span = trigger_entry->span;
enum mlxsw_sp_span_trigger_type type;
switch (trigger_entry->trigger) {
case MLXSW_SP_SPAN_TRIGGER_INGRESS:
case MLXSW_SP_SPAN_TRIGGER_EGRESS:
type = MLXSW_SP_SPAN_TRIGGER_TYPE_PORT;
break;
case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
case MLXSW_SP_SPAN_TRIGGER_ECN:
type = MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL;
break;
default:
WARN_ON_ONCE(1);
return;
}
trigger_entry->ops = span->span_trigger_ops_arr[type];
}
static struct mlxsw_sp_span_trigger_entry *
mlxsw_sp_span_trigger_entry_create(struct mlxsw_sp_span *span,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port,
const struct mlxsw_sp_span_trigger_parms
*parms)
{
struct mlxsw_sp_span_trigger_entry *trigger_entry;
int err;
trigger_entry = kzalloc(sizeof(*trigger_entry), GFP_KERNEL);
if (!trigger_entry)
return ERR_PTR(-ENOMEM);
refcount_set(&trigger_entry->ref_count, 1);
trigger_entry->local_port = mlxsw_sp_port ? mlxsw_sp_port->local_port :
0;
trigger_entry->trigger = trigger;
memcpy(&trigger_entry->parms, parms, sizeof(trigger_entry->parms));
trigger_entry->span = span;
mlxsw_sp_span_trigger_ops_set(trigger_entry);
list_add_tail(&trigger_entry->list, &span->trigger_entries_list);
err = trigger_entry->ops->bind(trigger_entry);
if (err)
goto err_trigger_entry_bind;
return trigger_entry;
err_trigger_entry_bind:
list_del(&trigger_entry->list);
kfree(trigger_entry);
return ERR_PTR(err);
}
static void
mlxsw_sp_span_trigger_entry_destroy(struct mlxsw_sp_span *span,
struct mlxsw_sp_span_trigger_entry *
trigger_entry)
{
trigger_entry->ops->unbind(trigger_entry);
list_del(&trigger_entry->list);
kfree(trigger_entry);
}
static struct mlxsw_sp_span_trigger_entry *
mlxsw_sp_span_trigger_entry_find(struct mlxsw_sp_span *span,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port)
{
struct mlxsw_sp_span_trigger_entry *trigger_entry;
list_for_each_entry(trigger_entry, &span->trigger_entries_list, list) {
if (trigger_entry->ops->matches(trigger_entry, trigger,
mlxsw_sp_port))
return trigger_entry;
}
return NULL;
}
int mlxsw_sp_span_agent_bind(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port,
const struct mlxsw_sp_span_trigger_parms *parms)
{
struct mlxsw_sp_span_trigger_entry *trigger_entry;
int err = 0;
ASSERT_RTNL();
if (!mlxsw_sp_span_entry_find_by_id(mlxsw_sp, parms->span_id))
return -EINVAL;
trigger_entry = mlxsw_sp_span_trigger_entry_find(mlxsw_sp->span,
trigger,
mlxsw_sp_port);
if (trigger_entry) {
if (trigger_entry->parms.span_id != parms->span_id ||
trigger_entry->parms.probability_rate !=
parms->probability_rate)
return -EINVAL;
refcount_inc(&trigger_entry->ref_count);
goto out;
}
trigger_entry = mlxsw_sp_span_trigger_entry_create(mlxsw_sp->span,
trigger,
mlxsw_sp_port,
parms);
if (IS_ERR(trigger_entry))
err = PTR_ERR(trigger_entry);
out:
return err;
}
void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_span_trigger trigger,
struct mlxsw_sp_port *mlxsw_sp_port,
const struct mlxsw_sp_span_trigger_parms *parms)
{
struct mlxsw_sp_span_trigger_entry *trigger_entry;
ASSERT_RTNL();
if (WARN_ON_ONCE(!mlxsw_sp_span_entry_find_by_id(mlxsw_sp,
parms->span_id)))
return;
trigger_entry = mlxsw_sp_span_trigger_entry_find(mlxsw_sp->span,
trigger,
mlxsw_sp_port);
if (WARN_ON_ONCE(!trigger_entry))
return;
if (!refcount_dec_and_test(&trigger_entry->ref_count))
return;
mlxsw_sp_span_trigger_entry_destroy(mlxsw_sp->span, trigger_entry);
}
int mlxsw_sp_span_trigger_enable(struct mlxsw_sp_port *mlxsw_sp_port,
enum mlxsw_sp_span_trigger trigger, u8 tc)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_span_trigger_entry *trigger_entry;
ASSERT_RTNL();
trigger_entry = mlxsw_sp_span_trigger_entry_find(mlxsw_sp->span,
trigger,
mlxsw_sp_port);
if (WARN_ON_ONCE(!trigger_entry))
return -EINVAL;
return trigger_entry->ops->enable(trigger_entry, mlxsw_sp_port, tc);
}
void mlxsw_sp_span_trigger_disable(struct mlxsw_sp_port *mlxsw_sp_port,
enum mlxsw_sp_span_trigger trigger, u8 tc)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_span_trigger_entry *trigger_entry;
ASSERT_RTNL();
trigger_entry = mlxsw_sp_span_trigger_entry_find(mlxsw_sp->span,
trigger,
mlxsw_sp_port);
if (WARN_ON_ONCE(!trigger_entry))
return;
return trigger_entry->ops->disable(trigger_entry, mlxsw_sp_port, tc);
}
bool mlxsw_sp_span_trigger_is_ingress(enum mlxsw_sp_span_trigger trigger)
{
switch (trigger) {
case MLXSW_SP_SPAN_TRIGGER_INGRESS:
case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
return true;
case MLXSW_SP_SPAN_TRIGGER_EGRESS:
case MLXSW_SP_SPAN_TRIGGER_ECN:
return false;
}
WARN_ON_ONCE(1);
return false;
}
static int mlxsw_sp1_span_init(struct mlxsw_sp *mlxsw_sp)
{
size_t arr_size = ARRAY_SIZE(mlxsw_sp1_span_entry_ops_arr);
/* Must be first to avoid NULL pointer dereference by subsequent
* can_handle() callbacks.
*/
if (WARN_ON(mlxsw_sp1_span_entry_ops_arr[0] !=
&mlxsw_sp1_span_entry_ops_cpu))
return -EINVAL;
mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp1_span_trigger_ops_arr;
mlxsw_sp->span->span_entry_ops_arr = mlxsw_sp1_span_entry_ops_arr;
mlxsw_sp->span->span_entry_ops_arr_size = arr_size;
return 0;
}
static int mlxsw_sp1_span_policer_id_base_set(struct mlxsw_sp *mlxsw_sp,
u16 policer_id_base)
{
return -EOPNOTSUPP;
}
const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
.init = mlxsw_sp1_span_init,
.policer_id_base_set = mlxsw_sp1_span_policer_id_base_set,
};
static int mlxsw_sp2_span_init(struct mlxsw_sp *mlxsw_sp)
{
size_t arr_size = ARRAY_SIZE(mlxsw_sp2_span_entry_ops_arr);
/* Must be first to avoid NULL pointer dereference by subsequent
* can_handle() callbacks.
*/
if (WARN_ON(mlxsw_sp2_span_entry_ops_arr[0] !=
&mlxsw_sp2_span_entry_ops_cpu))
return -EINVAL;
mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp2_span_trigger_ops_arr;
mlxsw_sp->span->span_entry_ops_arr = mlxsw_sp2_span_entry_ops_arr;
mlxsw_sp->span->span_entry_ops_arr_size = arr_size;
return 0;
}
#define MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR 38
#define MLXSW_SP3_SPAN_EG_MIRROR_BUFFER_FACTOR 50
static int mlxsw_sp2_span_policer_id_base_set(struct mlxsw_sp *mlxsw_sp,
u16 policer_id_base)
{
char mogcr_pl[MLXSW_REG_MOGCR_LEN];
int err;
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
if (err)
return err;
mlxsw_reg_mogcr_mirroring_pid_base_set(mogcr_pl, policer_id_base);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mogcr), mogcr_pl);
}
const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops = {
.init = mlxsw_sp2_span_init,
.policer_id_base_set = mlxsw_sp2_span_policer_id_base_set,
};
const struct mlxsw_sp_span_ops mlxsw_sp3_span_ops = {
.init = mlxsw_sp2_span_init,
.policer_id_base_set = mlxsw_sp2_span_policer_id_base_set,
};