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realtek: add driver support for routing offload

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Add generic support for listening to FIB and Event notifier updates and
use this information to hook into the L3 hardware capabilities of the
RTL SoCs.

Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
This commit is contained in:
Birger Koblitz 2021-09-10 15:04:27 +02:00 committed by John Crispin
parent 35b3c4c212
commit 03e1d93e07
2 changed files with 946 additions and 20 deletions
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815
target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/common.c
View File

@ -7,6 +7,7 @@
#include <net/neighbour.h>
#include <net/netevent.h>
#include <linux/inetdevice.h>
#include <linux/rhashtable.h>
#include <asm/mach-rtl838x/mach-rtl83xx.h>
#include "rtl83xx.h"
@ -495,6 +496,105 @@ int rtl83xx_packet_cntr_alloc(struct rtl838x_switch_priv *priv)
return idx;
}
/*
* Add an L2 nexthop entry for the L3 routing system / PIE forwarding in the SoC
* Use VID and MAC in rtl838x_l2_entry to identify either a free slot in the L2 hash table
* or mark an existing entry as a nexthop by setting it's nexthop bit
* Called from the L3 layer
* The index in the L2 hash table is filled into nh->l2_id;
*/
int rtl83xx_l2_nexthop_add(struct rtl838x_switch_priv *priv, struct rtl83xx_nexthop *nh)
{
struct rtl838x_l2_entry e;
u64 seed = priv->r->l2_hash_seed(nh->mac, nh->rvid);
u32 key = priv->r->l2_hash_key(priv, seed);
int i, idx = -1;
u64 entry;
pr_debug("%s searching for %08llx vid %d with key %d, seed: %016llx\n",
__func__, nh->mac, nh->rvid, key, seed);
e.type = L2_UNICAST;
u64_to_ether_addr(nh->mac, &e.mac[0]);
e.port = nh->port;
// Loop over all entries in the hash-bucket and over the second block on 93xx SoCs
for (i = 0; i < priv->l2_bucket_size; i++) {
entry = priv->r->read_l2_entry_using_hash(key, i, &e);
if (!e.valid || ((entry & 0x0fffffffffffffffULL) == seed)) {
idx = i > 3 ? ((key >> 14) & 0xffff) | i >> 1
: ((key << 2) | i) & 0xffff;
break;
}
}
if (idx < 0) {
pr_err("%s: No more L2 forwarding entries available\n", __func__);
return -1;
}
// Found an existing (e->valid is true) or empty entry, make it a nexthop entry
nh->l2_id = idx;
if (e.valid) {
nh->port = e.port;
nh->vid = e.vid; // Save VID
nh->rvid = e.rvid;
nh->dev_id = e.stack_dev;
// If the entry is already a valid next hop entry, don't change it
if (e.next_hop)
return 0;
} else {
e.valid = true;
e.is_static = true;
e.rvid = nh->rvid;
e.is_ip_mc = false;
e.is_ipv6_mc = false;
e.block_da = false;
e.block_sa = false;
e.suspended = false;
e.age = 0; // With port-ignore
e.port = priv->port_ignore;
u64_to_ether_addr(nh->mac, &e.mac[0]);
}
e.next_hop = true;
e.nh_route_id = nh->id; // NH route ID takes place of VID
e.nh_vlan_target = false;
priv->r->write_l2_entry_using_hash(idx >> 2, idx & 0x3, &e);
return 0;
}
/*
* Removes a Layer 2 next hop entry in the forwarding database
* If it was static, the entire entry is removed, otherwise the nexthop bit is cleared
* and we wait until the entry ages out
*/
int rtl83xx_l2_nexthop_rm(struct rtl838x_switch_priv *priv, struct rtl83xx_nexthop *nh)
{
struct rtl838x_l2_entry e;
u32 key = nh->l2_id >> 2;
int i = nh->l2_id & 0x3;
u64 entry = entry = priv->r->read_l2_entry_using_hash(key, i, &e);
pr_debug("%s: id %d, key %d, index %d\n", __func__, nh->l2_id, key, i);
if (!e.valid) {
dev_err(priv->dev, "unknown nexthop, id %x\n", nh->l2_id);
return -1;
}
if (e.is_static)
e.valid = false;
e.next_hop = false;
e.vid = nh->vid; // Restore VID
e.rvid = nh->rvid;
priv->r->write_l2_entry_using_hash(key, i, &e);
return 0;
}
static int rtl83xx_handle_changeupper(struct rtl838x_switch_priv *priv,
struct net_device *ndev,
struct netdev_notifier_changeupper_info *info)
@ -594,6 +694,671 @@ static int rtl83xx_netdevice_event(struct notifier_block *this,
return NOTIFY_DONE;
}
const static struct rhashtable_params route_ht_params = {
.key_len = sizeof(u32),
.key_offset = offsetof(struct rtl83xx_route, gw_ip),
.head_offset = offsetof(struct rtl83xx_route, linkage),
};
/*
* Updates an L3 next hop entry in the ROUTING table
*/
static int rtl83xx_l3_nexthop_update(struct rtl838x_switch_priv *priv, __be32 ip_addr, u64 mac)
{
struct rtl83xx_route *r;
struct rhlist_head *tmp, *list;
rcu_read_lock();
list = rhltable_lookup(&priv->routes, &ip_addr, route_ht_params);
if (!list) {
rcu_read_unlock();
return -ENOENT;
}
rhl_for_each_entry_rcu(r, tmp, list, linkage) {
pr_info("%s: Setting up fwding: ip %pI4, GW mac %016llx\n",
__func__, &ip_addr, mac);
// Reads the ROUTING table entry associated with the route
priv->r->route_read(r->id, r);
pr_info("Route with id %d to %pI4 / %d\n", r->id, &r->dst_ip, r->prefix_len);
r->nh.mac = r->nh.gw = mac;
r->nh.port = priv->port_ignore;
r->nh.id = r->id;
// Do we need to explicitly add a DMAC entry with the route's nh index?
if (priv->r->set_l3_egress_mac)
priv->r->set_l3_egress_mac(r->id, mac);
// Update ROUTING table: map gateway-mac and switch-mac id to route id
rtl83xx_l2_nexthop_add(priv, &r->nh);
r->attr.valid = true;
r->attr.action = ROUTE_ACT_FORWARD;
r->attr.type = 0;
r->attr.hit = false; // Reset route-used indicator
// Add PIE entry with dst_ip and prefix_len
r->pr.dip = r->dst_ip;
r->pr.dip_m = inet_make_mask(r->prefix_len);
if (r->is_host_route) {
int slot = priv->r->find_l3_slot(r, false);
pr_info("%s: Got slot for route: %d\n", __func__, slot);
priv->r->host_route_write(slot, r);
} else {
priv->r->route_write(r->id, r);
r->pr.fwd_sel = true;
r->pr.fwd_data = r->nh.l2_id;
r->pr.fwd_act = PIE_ACT_ROUTE_UC;
}
if (priv->r->set_l3_nexthop)
priv->r->set_l3_nexthop(r->nh.id, r->nh.l2_id, r->nh.if_id);
if (r->pr.id < 0) {
r->pr.packet_cntr = rtl83xx_packet_cntr_alloc(priv);
if (r->pr.packet_cntr >= 0) {
pr_info("Using packet counter %d\n", r->pr.packet_cntr);
r->pr.log_sel = true;
r->pr.log_data = r->pr.packet_cntr;
}
priv->r->pie_rule_add(priv, &r->pr);
} else {
int pkts = priv->r->packet_cntr_read(r->pr.packet_cntr);
pr_info("%s: total packets: %d\n", __func__, pkts);
priv->r->pie_rule_write(priv, r->pr.id, &r->pr);
}
}
rcu_read_unlock();
return 0;
}
static int rtl83xx_port_ipv4_resolve(struct rtl838x_switch_priv *priv,
struct net_device *dev, __be32 ip_addr)
{
struct neighbour *n = neigh_lookup(&arp_tbl, &ip_addr, dev);
int err = 0;
u64 mac;
if (!n) {
n = neigh_create(&arp_tbl, &ip_addr, dev);
if (IS_ERR(n))
return PTR_ERR(n);
}
/* If the neigh is already resolved, then go ahead and
* install the entry, otherwise start the ARP process to
* resolve the neigh.
*/
if (n->nud_state & NUD_VALID) {
mac = ether_addr_to_u64(n->ha);
pr_info("%s: resolved mac: %016llx\n", __func__, mac);
rtl83xx_l3_nexthop_update(priv, ip_addr, mac);
} else {
pr_info("%s: need to wait\n", __func__);
neigh_event_send(n, NULL);
}
neigh_release(n);
return err;
}
struct rtl83xx_walk_data {
struct rtl838x_switch_priv *priv;
int port;
};
static int rtl83xx_port_lower_walk(struct net_device *lower, struct netdev_nested_priv *_priv)
{
struct rtl83xx_walk_data *data = (struct rtl83xx_walk_data *)_priv->data;
struct rtl838x_switch_priv *priv = data->priv;
int ret = 0;
int index;
index = rtl83xx_port_is_under(lower, priv);
data->port = index;
if (index >= 0) {
pr_debug("Found DSA-port, index %d\n", index);
ret = 1;
}
return ret;
}
int rtl83xx_port_dev_lower_find(struct net_device *dev, struct rtl838x_switch_priv *priv)
{
struct rtl83xx_walk_data data;
struct netdev_nested_priv _priv;
data.priv = priv;
data.port = 0;
_priv.data = (void *)&data;
netdev_walk_all_lower_dev(dev, rtl83xx_port_lower_walk, &_priv);
return data.port;
}
static struct rtl83xx_route *rtl83xx_route_alloc(struct rtl838x_switch_priv *priv, u32 ip)
{
struct rtl83xx_route *r;
int idx = 0, err;
mutex_lock(&priv->reg_mutex);
idx = find_first_zero_bit(priv->route_use_bm, MAX_ROUTES);
pr_debug("%s id: %d, ip %pI4\n", __func__, idx, &ip);
r = kzalloc(sizeof(*r), GFP_KERNEL);
if (!r) {
mutex_unlock(&priv->reg_mutex);
return r;
}
r->id = idx;
r->gw_ip = ip;
r->pr.id = -1; // We still need to allocate a rule in HW
r->is_host_route = false;
err = rhltable_insert(&priv->routes, &r->linkage, route_ht_params);
if (err) {
pr_err("Could not insert new rule\n");
mutex_unlock(&priv->reg_mutex);
goto out_free;
}
set_bit(idx, priv->route_use_bm);
mutex_unlock(&priv->reg_mutex);
return r;
out_free:
kfree(r);
return NULL;
}
static struct rtl83xx_route *rtl83xx_host_route_alloc(struct rtl838x_switch_priv *priv, u32 ip)
{
struct rtl83xx_route *r;
int idx = 0, err;
mutex_lock(&priv->reg_mutex);
idx = find_first_zero_bit(priv->host_route_use_bm, MAX_HOST_ROUTES);
pr_debug("%s id: %d, ip %pI4\n", __func__, idx, &ip);
r = kzalloc(sizeof(*r), GFP_KERNEL);
if (!r) {
mutex_unlock(&priv->reg_mutex);
return r;
}
/* We require a unique route ID irrespective of whether it is a prefix or host
* route (on RTL93xx) as we use this ID to associate a DMAC and next-hop entry */
r->id = idx + MAX_ROUTES;
r->gw_ip = ip;
r->pr.id = -1; // We still need to allocate a rule in HW
r->is_host_route = true;
err = rhltable_insert(&priv->routes, &r->linkage, route_ht_params);
if (err) {
pr_err("Could not insert new rule\n");
mutex_unlock(&priv->reg_mutex);
goto out_free;
}
set_bit(idx, priv->host_route_use_bm);
mutex_unlock(&priv->reg_mutex);
return r;
out_free:
kfree(r);
return NULL;
}
static void rtl83xx_route_rm(struct rtl838x_switch_priv *priv, struct rtl83xx_route *r)
{
int id;
if (rhltable_remove(&priv->routes, &r->linkage, route_ht_params))
dev_warn(priv->dev, "Could not remove route\n");
if (r->is_host_route) {
id = priv->r->find_l3_slot(r, false);
pr_debug("%s: Got id for host route: %d\n", __func__, id);
r->attr.valid = false;
priv->r->host_route_write(id, r);
clear_bit(r->id - MAX_ROUTES, priv->host_route_use_bm);
} else {
// If there is a HW representation of the route, delete it
if (priv->r->route_lookup_hw) {
id = priv->r->route_lookup_hw(r);
pr_info("%s: Got id for prefix route: %d\n", __func__, id);
r->attr.valid = false;
priv->r->route_write(id, r);
}
clear_bit(r->id, priv->route_use_bm);
}
kfree(r);
}
static int rtl83xx_fib4_del(struct rtl838x_switch_priv *priv,
struct fib_entry_notifier_info *info)
{
struct fib_nh *nh = fib_info_nh(info->fi, 0);
struct rtl83xx_route *r;
struct rhlist_head *tmp, *list;
pr_debug("In %s, ip %pI4, len %d\n", __func__, &info->dst, info->dst_len);
rcu_read_lock();
list = rhltable_lookup(&priv->routes, &nh->fib_nh_gw4, route_ht_params);
if (!list) {
rcu_read_unlock();
pr_err("%s: no such gateway: %pI4\n", __func__, &nh->fib_nh_gw4);
return -ENOENT;
}
rhl_for_each_entry_rcu(r, tmp, list, linkage) {
if (r->dst_ip == info->dst && r->prefix_len == info->dst_len) {
pr_info("%s: found a route with id %d, nh-id %d\n",
__func__, r->id, r->nh.id);
break;
}
}
rcu_read_unlock();
rtl83xx_l2_nexthop_rm(priv, &r->nh);
pr_debug("%s: Releasing packet counter %d\n", __func__, r->pr.packet_cntr);
set_bit(r->pr.packet_cntr, priv->packet_cntr_use_bm);
priv->r->pie_rule_rm(priv, &r->pr);
rtl83xx_route_rm(priv, r);
nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
return 0;
}
/*
* On the RTL93xx, an L3 termination endpoint MAC address on which the router waits
* for packets to be routed needs to be allocated.
*/
static int rtl83xx_alloc_router_mac(struct rtl838x_switch_priv *priv, u64 mac)
{
int i, free_mac = -1;
struct rtl93xx_rt_mac m;
mutex_lock(&priv->reg_mutex);
for (i = 0; i < MAX_ROUTER_MACS; i++) {
priv->r->get_l3_router_mac(i, &m);
if (free_mac < 0 && !m.valid) {
free_mac = i;
continue;
}
if (m.valid && m.mac == mac) {
free_mac = i;
break;
}
}
if (free_mac < 0) {
pr_err("No free router MACs, cannot offload\n");
mutex_unlock(&priv->reg_mutex);
return -1;
}
m.valid = true;
m.mac = mac;
m.p_type = 0; // An individual port, not a trunk port
m.p_id = 0x3f; // Listen on any port
m.p_id_mask = 0;
m.vid = 0; // Listen on any VLAN...
m.vid_mask = 0; // ... so mask needs to be 0
m.mac_mask = 0xffffffffffffULL; // We want an exact match of the interface MAC
m.action = L3_FORWARD; // Route the packet
priv->r->set_l3_router_mac(free_mac, &m);
mutex_unlock(&priv->reg_mutex);
return 0;
}
static int rtl83xx_alloc_egress_intf(struct rtl838x_switch_priv *priv, u64 mac, int vlan)
{
int i, free_mac = -1;
struct rtl838x_l3_intf intf;
u64 m;
mutex_lock(&priv->reg_mutex);
for (i = 0; i < MAX_SMACS; i++) {
m = priv->r->get_l3_egress_mac(L3_EGRESS_DMACS + i);
if (free_mac < 0 && !m) {
free_mac = i;
continue;
}
if (m == mac) {
mutex_unlock(&priv->reg_mutex);
return i;
}
}
if (free_mac < 0) {
pr_err("No free egress interface, cannot offload\n");
return -1;
}
// Set up default egress interface 1
intf.vid = vlan;
intf.smac_idx = free_mac;
intf.ip4_mtu_id = 1;
intf.ip6_mtu_id = 1;
intf.ttl_scope = 1; // TTL
intf.hl_scope = 1; // Hop Limit
intf.ip4_icmp_redirect = intf.ip6_icmp_redirect = 2; // FORWARD
intf.ip4_pbr_icmp_redirect = intf.ip6_pbr_icmp_redirect = 2; // FORWARD;
priv->r->set_l3_egress_intf(free_mac, &intf);
priv->r->set_l3_egress_mac(L3_EGRESS_DMACS + free_mac, mac);
mutex_unlock(&priv->reg_mutex);
return free_mac;
}
static int rtl83xx_fib4_add(struct rtl838x_switch_priv *priv,
struct fib_entry_notifier_info *info)
{
struct fib_nh *nh = fib_info_nh(info->fi, 0);
struct net_device *dev = fib_info_nh(info->fi, 0)->fib_nh_dev;
int port;
struct rtl83xx_route *r;
bool to_localhost;
int vlan = is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0;
pr_debug("In %s, ip %pI4, len %d\n", __func__, &info->dst, info->dst_len);
if (!info->dst) {
pr_info("Not offloading default route for now\n");
return 0;
}
pr_debug("GW: %pI4, interface name %s, mac %016llx, vlan %d\n", &nh->fib_nh_gw4, dev->name,
ether_addr_to_u64(dev->dev_addr), vlan
);
port = rtl83xx_port_dev_lower_find(dev, priv);
if (port < 0)
return -1;
// For now we only work with routes that have a gateway and are not ourself
// if ((!nh->fib_nh_gw4) && (info->dst_len != 32))
// return 0;
if ((info->dst & 0xff) == 0xff)
return 0;
// Do not offload routes to 192.168.100.x
if ((info->dst & 0xffffff00) == 0xc0a86400)
return 0;
// Do not offload routes to 127.x.x.x
if ((info->dst & 0xff000000) == 0x7f000000)
return 0;
// Allocate route or host-route (entry if hardware supports this)
if (info->dst_len == 32 && priv->r->host_route_write)
r = rtl83xx_host_route_alloc(priv, nh->fib_nh_gw4);
else
r = rtl83xx_route_alloc(priv, nh->fib_nh_gw4);
if (!r) {
pr_err("%s: No more free route entries\n", __func__);
return -1;
}
r->dst_ip = info->dst;
r->prefix_len = info->dst_len;
r->nh.rvid = vlan;
to_localhost = !nh->fib_nh_gw4;
if (priv->r->set_l3_router_mac) {
u64 mac = ether_addr_to_u64(dev->dev_addr);
pr_debug("Local route and router mac %016llx\n", mac);
if (rtl83xx_alloc_router_mac(priv, mac))
goto out_free_rt;
// vid = 0: Do not care about VID
r->nh.if_id = rtl83xx_alloc_egress_intf(priv, mac, vlan);
if (r->nh.if_id < 0)
goto out_free_rmac;
if (to_localhost) {
int slot;
r->nh.mac = mac;
r->nh.port = priv->port_ignore;
r->attr.valid = true;
r->attr.action = ROUTE_ACT_TRAP2CPU;
r->attr.type = 0;
slot = priv->r->find_l3_slot(r, false);
pr_debug("%s: Got slot for route: %d\n", __func__, slot);
priv->r->host_route_write(slot, r);
}
}
// We need to resolve the mac address of the GW
if (!to_localhost)
rtl83xx_port_ipv4_resolve(priv, dev, nh->fib_nh_gw4);
nh->fib_nh_flags |= RTNH_F_OFFLOAD;
return 0;
out_free_rmac:
out_free_rt:
return 0;
}
static int rtl83xx_fib6_add(struct rtl838x_switch_priv *priv,
struct fib6_entry_notifier_info *info)
{
pr_debug("In %s\n", __func__);
// nh->fib_nh_flags |= RTNH_F_OFFLOAD;
return 0;
}
struct net_event_work {
struct work_struct work;
struct rtl838x_switch_priv *priv;
u64 mac;
u32 gw_addr;
};
static void rtl83xx_net_event_work_do(struct work_struct *work)
{
struct net_event_work *net_work =
container_of(work, struct net_event_work, work);
struct rtl838x_switch_priv *priv = net_work->priv;
rtl83xx_l3_nexthop_update(priv, net_work->gw_addr, net_work->mac);
}
static int rtl83xx_netevent_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct rtl838x_switch_priv *priv;
struct net_device *dev;
struct neighbour *n = ptr;
int err, port;
struct net_event_work *net_work;
priv = container_of(this, struct rtl838x_switch_priv, ne_nb);
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
INIT_WORK(&net_work->work, rtl83xx_net_event_work_do);
net_work->priv = priv;
switch (event) {
case NETEVENT_NEIGH_UPDATE:
if (n->tbl != &arp_tbl)
return NOTIFY_DONE;
dev = n->dev;
port = rtl83xx_port_dev_lower_find(dev, priv);
if (port < 0 || !(n->nud_state & NUD_VALID)) {
pr_debug("%s: Neigbour invalid, not updating\n", __func__);
kfree(net_work);
return NOTIFY_DONE;
}
net_work->mac = ether_addr_to_u64(n->ha);
net_work->gw_addr = *(__be32 *) n->primary_key;
pr_debug("%s: updating neighbour on port %d, mac %016llx\n",
__func__, port, net_work->mac);
schedule_work(&net_work->work);
if (err)
netdev_warn(dev, "failed to handle neigh update (err %d)\n", err);
break;
}
return NOTIFY_DONE;
}
struct rtl83xx_fib_event_work {
struct work_struct work;
union {
struct fib_entry_notifier_info fen_info;
struct fib6_entry_notifier_info fen6_info;
struct fib_rule_notifier_info fr_info;
};
struct rtl838x_switch_priv *priv;
bool is_fib6;
unsigned long event;
};
static void rtl83xx_fib_event_work_do(struct work_struct *work)
{
struct rtl83xx_fib_event_work *fib_work =
container_of(work, struct rtl83xx_fib_event_work, work);
struct rtl838x_switch_priv *priv = fib_work->priv;
struct fib_rule *rule;
int err;
/* Protect internal structures from changes */
rtnl_lock();
pr_debug("%s: doing work, event %ld\n", __func__, fib_work->event);
switch (fib_work->event) {
case FIB_EVENT_ENTRY_ADD:
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_APPEND:
if (fib_work->is_fib6) {
err = rtl83xx_fib6_add(priv, &fib_work->fen6_info);
} else {
err = rtl83xx_fib4_add(priv, &fib_work->fen_info);
fib_info_put(fib_work->fen_info.fi);
}
if (err)
pr_err("%s: FIB4 failed\n", __func__);
break;
case FIB_EVENT_ENTRY_DEL:
rtl83xx_fib4_del(priv, &fib_work->fen_info);
fib_info_put(fib_work->fen_info.fi);
break;
case FIB_EVENT_RULE_ADD:
case FIB_EVENT_RULE_DEL:
rule = fib_work->fr_info.rule;
if (!fib4_rule_default(rule))
pr_err("%s: FIB4 default rule failed\n", __func__);
fib_rule_put(rule);
break;
}
rtnl_unlock();
kfree(fib_work);
}
/* Called with rcu_read_lock() */
static int rtl83xx_fib_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct fib_notifier_info *info = ptr;
struct rtl838x_switch_priv *priv;
struct rtl83xx_fib_event_work *fib_work;
if ((info->family != AF_INET && info->family != AF_INET6 &&
info->family != RTNL_FAMILY_IPMR &&
info->family != RTNL_FAMILY_IP6MR))
return NOTIFY_DONE;
priv = container_of(this, struct rtl838x_switch_priv, fib_nb);
fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
if (!fib_work)
return NOTIFY_BAD;
INIT_WORK(&fib_work->work, rtl83xx_fib_event_work_do);
fib_work->priv = priv;
fib_work->event = event;
fib_work->is_fib6 = false;
switch (event) {
case FIB_EVENT_ENTRY_ADD:
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_APPEND:
case FIB_EVENT_ENTRY_DEL:
pr_debug("%s: FIB_ENTRY ADD/DELL, event %ld\n", __func__, event);
if (info->family == AF_INET) {
struct fib_entry_notifier_info *fen_info = ptr;
if (fen_info->fi->fib_nh_is_v6) {
NL_SET_ERR_MSG_MOD(info->extack,
"IPv6 gateway with IPv4 route is not supported");
kfree(fib_work);
return notifier_from_errno(-EINVAL);
}
memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
/* Take referece on fib_info to prevent it from being
* freed while work is queued. Release it afterwards.
*/
fib_info_hold(fib_work->fen_info.fi);
} else if (info->family == AF_INET6) {
struct fib6_entry_notifier_info *fen6_info = ptr;
pr_warn("%s: FIB_RULE ADD/DELL for IPv6 not supported\n", __func__);
kfree(fib_work);
return notifier_from_errno(-EINVAL);
}
break;
case FIB_EVENT_RULE_ADD:
case FIB_EVENT_RULE_DEL:
pr_debug("%s: FIB_RULE ADD/DELL, event: %ld\n", __func__, event);
memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
fib_rule_get(fib_work->fr_info.rule);
break;
}
schedule_work(&fib_work->work);
return NOTIFY_DONE;
}
static int __init rtl83xx_sw_probe(struct platform_device *pdev)
{
int err = 0, i;
@ -623,6 +1388,8 @@ static int __init rtl83xx_sw_probe(struct platform_device *pdev)
priv->ds->ops = &rtl83xx_switch_ops;
priv->dev = dev;
mutex_init(&priv->reg_mutex);
priv->family_id = soc_info.family;
priv->id = soc_info.id;
switch(soc_info.family) {
@ -751,18 +1518,51 @@ static int __init rtl83xx_sw_probe(struct platform_device *pdev)
rtl83xx_setup_qos(priv);
priv->r->l3_setup(priv);
/* Clear all destination ports for mirror groups */
for (i = 0; i < 4; i++)
priv->mirror_group_ports[i] = -1;
/*
* Register netdevice event callback to catch changes in link aggregation groups
*/
priv->nb.notifier_call = rtl83xx_netdevice_event;
if (register_netdevice_notifier(&priv->nb)) {
priv->nb.notifier_call = NULL;
dev_err(dev, "Failed to register LAG netdev notifier\n");
if (register_netdevice_notifier(&priv->nb)) {
priv->nb.notifier_call = NULL;
dev_err(dev, "Failed to register LAG netdev notifier\n");
goto err_register_nb;
}
// Initialize hash table for L3 routing
rhltable_init(&priv->routes, &route_ht_params);
/*
* Register netevent notifier callback to catch notifications about neighboring
* changes to update nexthop entries for L3 routing.
*/
priv->ne_nb.notifier_call = rtl83xx_netevent_event;
if (register_netevent_notifier(&priv->ne_nb)) {
priv->ne_nb.notifier_call = NULL;
dev_err(dev, "Failed to register netevent notifier\n");
goto err_register_ne_nb;
}
priv->fib_nb.notifier_call = rtl83xx_fib_event;
/*
* Register Forwarding Information Base notifier to offload routes where
* where possible
* Only FIBs pointing to our own netdevs are programmed into
* the device, so no need to pass a callback.
*/
err = register_fib_notifier(&init_net, &priv->fib_nb, NULL, NULL);
if (err)
goto err_register_fib_nb;
// TODO: put this into l2_setup()
// Flood BPDUs to all ports including cpu-port
if (soc_info.family != RTL9300_FAMILY_ID) { // TODO: Port this functionality
if (soc_info.family != RTL9300_FAMILY_ID) {
bpdu_mask = soc_info.family == RTL8380_FAMILY_ID ? 0x1FFFFFFF : 0x1FFFFFFFFFFFFF;
priv->r->set_port_reg_be(bpdu_mask, priv->r->rma_bpdu_fld_pmask);
@ -772,6 +1572,13 @@ static int __init rtl83xx_sw_probe(struct platform_device *pdev)
rtl838x_dbgfs_init(priv);
}
return 0;
err_register_fib_nb:
unregister_netevent_notifier(&priv->ne_nb);
err_register_ne_nb:
unregister_netdevice_notifier(&priv->nb);
err_register_nb:
return err;
}

151
target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.h
View File

@ -66,29 +66,28 @@
#define RTL838X_VLAN_PROFILE(idx) (0x3A88 + ((idx) << 2))
#define RTL838X_VLAN_PORT_EGR_FLTR (0x3A84)
#define RTL838X_VLAN_PORT_PB_VLAN (0x3C00)
#define RTL838X_VLAN_PORT_IGR_FLTR(port) (0x3A7C + (((port >> 4) << 2)))
#define RTL838X_VLAN_PORT_IGR_FLTR_0 (0x3A7C)
#define RTL838X_VLAN_PORT_IGR_FLTR_1 (0x3A7C + 4)
#define RTL838X_VLAN_PORT_IGR_FLTR (0x3A7C)
#define RTL838X_VLAN_PORT_TAG_STS_CTRL (0xA530)
#define RTL839X_VLAN_PROFILE(idx) (0x25C0 + (((idx) << 3)))
#define RTL839X_VLAN_CTRL (0x26D4)
#define RTL839X_VLAN_PORT_PB_VLAN (0x26D8)
#define RTL839X_VLAN_PORT_IGR_FLTR(port) (0x27B4 + (((port >> 4) << 2)))
#define RTL839X_VLAN_PORT_EGR_FLTR(port) (0x27C4 + (((port >> 5) << 2)))
#define RTL839X_VLAN_PORT_IGR_FLTR (0x27B4)
#define RTL839X_VLAN_PORT_EGR_FLTR (0x27C4)
#define RTL839X_VLAN_PORT_TAG_STS_CTRL (0x6828)
#define RTL839X_VLAN_PORT_TAG_STS_CTRL (0x6828)
#define RTL930X_VLAN_PROFILE_SET(idx) (0x9c60 + (((idx) * 20)))
#define RTL930X_VLAN_CTRL (0x82D4)
#define RTL930X_VLAN_PORT_PB_VLAN (0x82D8)
#define RTL930X_VLAN_PORT_IGR_FLTR(port) (0x83C0 + (((port >> 4) << 2)))
#define RTL930X_VLAN_PORT_IGR_FLTR (0x83C0)
#define RTL930X_VLAN_PORT_EGR_FLTR (0x83C8)
#define RTL930X_VLAN_PORT_TAG_STS_CTRL (0xCE24)
#define RTL931X_VLAN_PROFILE_SET(idx) (0x9800 + (((idx) * 28)))
#define RTL931X_VLAN_CTRL (0x94E4)
#define RTL931X_VLAN_PORT_IGR_FLTR(port) (0x96B4 + (((port >> 4) << 2)))
#define RTL931X_VLAN_PORT_EGR_FLTR(port) (0x96C4 + (((port >> 5) << 2)))
#define RTL931X_VLAN_PORT_IGR_FLTR (0x96B4)
#define RTL931X_VLAN_PORT_EGR_FLTR (0x96C4)
#define RTL931X_VLAN_PORT_TAG_CTRL (0x4860)
/* Table access registers */
@ -379,6 +378,35 @@
#define PIE_ACT_ROUTE_UC 6
#define PIE_ACT_VID_ASSIGN 0
// L3 actions
#define L3_FORWARD 0
#define L3_DROP 1
#define L3_TRAP2CPU 2
#define L3_COPY2CPU 3
#define L3_TRAP2MASTERCPU 4
#define L3_COPY2MASTERCPU 5
#define L3_HARDDROP 6
// Route actions
#define ROUTE_ACT_FORWARD 0
#define ROUTE_ACT_TRAP2CPU 1
#define ROUTE_ACT_COPY2CPU 2
#define ROUTE_ACT_DROP 3
/* L3 Routing */
#define RTL839X_ROUTING_SA_CTRL 0x6afc
#define RTL930X_L3_HOST_TBL_CTRL (0xAB48)
#define RTL930X_L3_IPUC_ROUTE_CTRL (0xAB4C)
#define RTL930X_L3_IP6UC_ROUTE_CTRL (0xAB50)
#define RTL930X_L3_IPMC_ROUTE_CTRL (0xAB54)
#define RTL930X_L3_IP6MC_ROUTE_CTRL (0xAB58)
#define RTL930X_L3_IP_MTU_CTRL(i) (0xAB5C + ((i >> 1) << 2))
#define RTL930X_L3_IP6_MTU_CTRL(i) (0xAB6C + ((i >> 1) << 2))
#define RTL930X_L3_HW_LU_KEY_CTRL (0xAC9C)
#define RTL930X_L3_HW_LU_KEY_IP_CTRL (0xACA0)
#define RTL930X_L3_HW_LU_CTRL (0xACC0)
#define RTL930X_L3_IP_ROUTE_CTRL 0xab44
#define MAX_VLANS 4096
#define MAX_LAGS 16
#define MAX_PRIOS 8
@ -389,6 +417,14 @@
#define MAX_PIE_ENTRIES (18 * PIE_BLOCK_SIZE)
#define N_FIXED_FIELDS 12
#define MAX_COUNTERS 2048
#define MAX_ROUTES 512
#define MAX_HOST_ROUTES 1536
#define MAX_INTF_MTUS 8
#define DEFAULT_MTU 1536
#define MAX_INTERFACES 100
#define MAX_ROUTER_MACS 64
#define L3_EGRESS_DMACS 2048
#define MAX_SMACS 64
enum phy_type {
PHY_NONE = 0,
@ -614,17 +650,52 @@ struct pie_rule {
bool bypass_ibc_sc; // Bypass Ingress Bandwidth Control and Storm Control
};
struct rtl838x_nexthop {
u16 id; // ID in HW Nexthop table
u32 ip; // IP Addres of nexthop
struct rtl838x_l3_intf {
u16 vid;
u8 smac_idx;
u8 ip4_mtu_id;
u8 ip6_mtu_id;
u16 ip4_mtu;
u16 ip6_mtu;
u8 ttl_scope;
u8 hl_scope;
u8 ip4_icmp_redirect;
u8 ip6_icmp_redirect;
u8 ip4_pbr_icmp_redirect;
u8 ip6_pbr_icmp_redirect;
};
/*
* An entry in the RTL93XX SoC's ROUTER_MAC tables setting up a termination point
* for the L3 routing system. Packets arriving and matching an entry in this table
* will be considered for routing.
* Mask fields state whether the corresponding data fields matter for matching
*/
struct rtl93xx_rt_mac {
bool valid; // Valid or not
bool p_type; // Individual (0) or trunk (1) port
bool p_mask; // Whether the port type is used
u8 p_id;
u8 p_id_mask; // Mask for the port
u8 action; // Routing action performed: 0: FORWARD, 1: DROP, 2: TRAP2CPU
// 3: COPY2CPU, 4: TRAP2MASTERCPU, 5: COPY2MASTERCPU, 6: HARDDROP
u16 vid;
u16 vid_mask;
u64 mac; // MAC address used as source MAC in the routed packet
u64 mac_mask;
};
struct rtl83xx_nexthop {
u16 id; // ID: L3_NEXT_HOP table-index or route-index set in L2_NEXT_HOP
u32 dev_id;
u16 port;
u16 vid;
u16 fid;
u64 mac;
u16 vid; // VLAN-ID for L2 table entry (saved from L2-UC entry)
u16 rvid; // Relay VID/FID for the L2 table entry
u64 mac; // The MAC address of the entry in the L2_NEXT_HOP table
u16 mac_id;
u16 l2_id; // Index of this next hop forwarding entry in L2 FIB table
u16 if_id;
u64 gw; // The gateway MAC address packets are forwarded to
int if_id; // Interface (into L3_EGR_INTF_IDX)
};
struct rtl838x_switch_priv;
@ -638,6 +709,32 @@ struct rtl83xx_flow {
u32 flags;
};
struct rtl93xx_route_attr {
bool valid;
bool hit;
bool ttl_dec;
bool ttl_check;
bool dst_null;
bool qos_as;
u8 qos_prio;
u8 type;
u8 action;
};
struct rtl83xx_route {
u32 gw_ip; // IP of the route's gateway
u32 dst_ip; // IP of the destination net
struct in6_addr dst_ip6;
int prefix_len; // Network prefix len of the destination net
bool is_host_route;
int id; // ID number of this route
struct rhlist_head linkage;
u16 switch_mac_id; // Index into switch's own MACs, RTL839X only
struct rtl83xx_nexthop nh;
struct pie_rule pr;
struct rtl93xx_route_attr attr;
};
struct rtl838x_reg {
void (*mask_port_reg_be)(u64 clear, u64 set, int reg);
void (*set_port_reg_be)(u64 set, int reg);
@ -713,6 +810,19 @@ struct rtl838x_reg {
void (*l2_learning_setup)(void);
u32 (*packet_cntr_read)(int counter);
void (*packet_cntr_clear)(int counter);
void (*route_read)(int idx, struct rtl83xx_route *rt);
void (*route_write)(int idx, struct rtl83xx_route *rt);
void (*host_route_write)(int idx, struct rtl83xx_route *rt);
int (*l3_setup)(struct rtl838x_switch_priv *priv);
void (*set_l3_nexthop)(int idx, u16 dmac_id, u16 interface);
void (*get_l3_nexthop)(int idx, u16 *dmac_id, u16 *interface);
u64 (*get_l3_egress_mac)(u32 idx);
void (*set_l3_egress_mac)(u32 idx, u64 mac);
int (*find_l3_slot)(struct rtl83xx_route *rt, bool must_exist);
int (*route_lookup_hw)(struct rtl83xx_route *rt);
void (*get_l3_router_mac)(u32 idx, struct rtl93xx_rt_mac *m);
void (*set_l3_router_mac)(u32 idx, struct rtl93xx_rt_mac *m);
void (*set_l3_egress_intf)(int idx, struct rtl838x_l3_intf *intf);
};
struct rtl838x_switch_priv {
@ -740,7 +850,9 @@ struct rtl838x_switch_priv {
int n_lags;
u64 lags_port_members[MAX_LAGS];
struct net_device *lag_devs[MAX_LAGS];
struct notifier_block nb;
struct notifier_block nb; // TODO: change to different name
struct notifier_block ne_nb;
struct notifier_block fib_nb;
bool eee_enabled;
unsigned long int mc_group_bm[MAX_MC_GROUPS >> 5];
int n_pie_blocks;
@ -749,8 +861,15 @@ struct rtl838x_switch_priv {
int n_counters;
unsigned long int octet_cntr_use_bm[MAX_COUNTERS >> 5];
unsigned long int packet_cntr_use_bm[MAX_COUNTERS >> 4];
struct rhltable routes;
unsigned long int route_use_bm[MAX_ROUTES >> 5];
unsigned long int host_route_use_bm[MAX_HOST_ROUTES >> 5];
struct rtl838x_l3_intf *interfaces[MAX_INTERFACES];
u16 intf_mtus[MAX_INTF_MTUS];
int intf_mtu_count[MAX_INTF_MTUS];
};
void rtl838x_dbgfs_init(struct rtl838x_switch_priv *priv);
void rtl930x_dbgfs_init(struct rtl838x_switch_priv *priv);
#endif /* _RTL838X_H */