Commit 6dfd23d3 authored by Vladimir Oltean's avatar Vladimir Oltean Committed by David S. Miller

net: dsa: sja1105: delete vlan delta save/restore logic

With the best_effort_vlan_filtering mode now gone, the driver does not
have 3 operating modes anymore (VLAN-unaware, VLAN-aware and best effort),
but only 2.

The idea is that we will gain support for network stack I/O through a
VLAN-aware bridge, using the data plane offload framework (imprecise RX,
imprecise TX). So the VLAN-aware use case will be more functional.

But standalone ports that are part of the same switch when some other
ports are under a VLAN-aware bridge should work too. Termination on
those should work through the tag_8021q RX VLAN and TX VLAN.

This was not possible using the old logic, because:
- in VLAN-unaware mode, only the tag_8021q VLANs were committed to hw
- in VLAN-aware mode, only the bridge VLANs were committed to hw
- in best-effort VLAN mode, both the tag_8021q and bridge VLANs were
  committed to hw

The strategy for the new VLAN-aware mode is to allow the bridge and the
tag_8021q VLANs to coexist in the VLAN table at the same time.

[ yes, we need to make sure that the bridge cannot install a tag_8021q
  VLAN, but ]

This means that the save/restore logic introduced by commit ec5ae610
("net: dsa: sja1105: save/restore VLANs using a delta commit method")
does not serve a purpose any longer. We can delete it and restore the
old code that simply adds a VLAN to the VLAN table and calls it a day.

Note that we keep the sja1105_commit_pvid() function from those days,
but adapt it slightly. Ports that are under a VLAN-aware bridge use the
bridge's pvid, ports that are standalone or under a VLAN-unaware bridge
use the tag_8021q pvid, for local termination or VLAN-unaware forwarding.

Now, when the vlan_filtering property is toggled for the bridge, the
pvid of the ports beneath it is the only thing that's changing, we no
longer delete some VLANs and restore others.
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d63f8877
......@@ -226,14 +226,6 @@ struct sja1105_flow_block {
int num_virtual_links;
};
struct sja1105_bridge_vlan {
struct list_head list;
int port;
u16 vid;
bool pvid;
bool untagged;
};
struct sja1105_private {
struct sja1105_static_config static_config;
bool rgmii_rx_delay[SJA1105_MAX_NUM_PORTS];
......@@ -249,8 +241,8 @@ struct sja1105_private {
struct gpio_desc *reset_gpio;
struct spi_device *spidev;
struct dsa_switch *ds;
struct list_head dsa_8021q_vlans;
struct list_head bridge_vlans;
u16 bridge_pvid[SJA1105_MAX_NUM_PORTS];
u16 tag_8021q_pvid[SJA1105_MAX_NUM_PORTS];
struct sja1105_flow_block flow_block;
struct sja1105_port ports[SJA1105_MAX_NUM_PORTS];
/* Serializes transmission of management frames so that
......
......@@ -378,8 +378,6 @@ static int sja1105_init_static_vlan(struct sja1105_private *priv)
table->entry_count = 1;
for (port = 0; port < ds->num_ports; port++) {
struct sja1105_bridge_vlan *v;
if (dsa_is_unused_port(ds, port))
continue;
......@@ -387,22 +385,10 @@ static int sja1105_init_static_vlan(struct sja1105_private *priv)
pvid.vlan_bc |= BIT(port);
pvid.tag_port &= ~BIT(port);
v = kzalloc(sizeof(*v), GFP_KERNEL);
if (!v)
return -ENOMEM;
v->port = port;
v->vid = SJA1105_DEFAULT_VLAN;
v->untagged = true;
if (dsa_is_cpu_port(ds, port))
v->pvid = true;
list_add(&v->list, &priv->dsa_8021q_vlans);
v = kmemdup(v, sizeof(*v), GFP_KERNEL);
if (!v)
return -ENOMEM;
list_add(&v->list, &priv->bridge_vlans);
if (dsa_is_cpu_port(ds, port)) {
priv->tag_8021q_pvid[port] = SJA1105_DEFAULT_VLAN;
priv->bridge_pvid[port] = SJA1105_DEFAULT_VLAN;
}
}
((struct sja1105_vlan_lookup_entry *)table->entries)[0] = pvid;
......@@ -1990,12 +1976,29 @@ static int sja1105_pvid_apply(struct sja1105_private *priv, int port, u16 pvid)
mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
if (mac[port].vlanid == pvid)
return 0;
mac[port].vlanid = pvid;
return sja1105_dynamic_config_write(priv, BLK_IDX_MAC_CONFIG, port,
&mac[port], true);
}
static int sja1105_commit_pvid(struct dsa_switch *ds, int port)
{
struct dsa_port *dp = dsa_to_port(ds, port);
struct sja1105_private *priv = ds->priv;
u16 pvid;
if (dp->bridge_dev && br_vlan_enabled(dp->bridge_dev))
pvid = priv->bridge_pvid[port];
else
pvid = priv->tag_8021q_pvid[port];
return sja1105_pvid_apply(priv, port, pvid);
}
static enum dsa_tag_protocol
sja1105_get_tag_protocol(struct dsa_switch *ds, int port,
enum dsa_tag_protocol mp)
......@@ -2021,179 +2024,6 @@ static int sja1105_is_vlan_configured(struct sja1105_private *priv, u16 vid)
return -1;
}
static int sja1105_commit_vlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan)
{
struct sja1105_vlan_lookup_entry *vlan;
struct sja1105_table *table;
int num_vlans = 0;
int rc, i, k = 0;
/* VLAN table */
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
vlan = table->entries;
for (i = 0; i < VLAN_N_VID; i++) {
int match = sja1105_is_vlan_configured(priv, i);
if (new_vlan[i].vlanid != VLAN_N_VID)
num_vlans++;
if (new_vlan[i].vlanid == VLAN_N_VID && match >= 0) {
/* Was there before, no longer is. Delete */
dev_dbg(priv->ds->dev, "Deleting VLAN %d\n", i);
rc = sja1105_dynamic_config_write(priv,
BLK_IDX_VLAN_LOOKUP,
i, &vlan[match], false);
if (rc < 0)
return rc;
} else if (new_vlan[i].vlanid != VLAN_N_VID) {
/* Nothing changed, don't do anything */
if (match >= 0 &&
vlan[match].vlanid == new_vlan[i].vlanid &&
vlan[match].tag_port == new_vlan[i].tag_port &&
vlan[match].vlan_bc == new_vlan[i].vlan_bc &&
vlan[match].vmemb_port == new_vlan[i].vmemb_port)
continue;
/* Update entry */
dev_dbg(priv->ds->dev, "Updating VLAN %d\n", i);
rc = sja1105_dynamic_config_write(priv,
BLK_IDX_VLAN_LOOKUP,
i, &new_vlan[i],
true);
if (rc < 0)
return rc;
}
}
if (table->entry_count)
kfree(table->entries);
table->entries = kcalloc(num_vlans, table->ops->unpacked_entry_size,
GFP_KERNEL);
if (!table->entries)
return -ENOMEM;
table->entry_count = num_vlans;
vlan = table->entries;
for (i = 0; i < VLAN_N_VID; i++) {
if (new_vlan[i].vlanid == VLAN_N_VID)
continue;
vlan[k++] = new_vlan[i];
}
return 0;
}
static int sja1105_commit_pvid(struct sja1105_private *priv)
{
struct sja1105_bridge_vlan *v;
struct list_head *vlan_list;
int rc = 0;
if (priv->vlan_aware)
vlan_list = &priv->bridge_vlans;
else
vlan_list = &priv->dsa_8021q_vlans;
list_for_each_entry(v, vlan_list, list) {
if (v->pvid) {
rc = sja1105_pvid_apply(priv, v->port, v->vid);
if (rc)
break;
}
}
return rc;
}
static int
sja1105_build_bridge_vlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan)
{
struct sja1105_bridge_vlan *v;
if (!priv->vlan_aware)
return 0;
list_for_each_entry(v, &priv->bridge_vlans, list) {
int match = v->vid;
new_vlan[match].vlanid = v->vid;
new_vlan[match].vmemb_port |= BIT(v->port);
new_vlan[match].vlan_bc |= BIT(v->port);
if (!v->untagged)
new_vlan[match].tag_port |= BIT(v->port);
new_vlan[match].type_entry = SJA1110_VLAN_D_TAG;
}
return 0;
}
static int
sja1105_build_dsa_8021q_vlans(struct sja1105_private *priv,
struct sja1105_vlan_lookup_entry *new_vlan)
{
struct sja1105_bridge_vlan *v;
list_for_each_entry(v, &priv->dsa_8021q_vlans, list) {
int match = v->vid;
new_vlan[match].vlanid = v->vid;
new_vlan[match].vmemb_port |= BIT(v->port);
new_vlan[match].vlan_bc |= BIT(v->port);
if (!v->untagged)
new_vlan[match].tag_port |= BIT(v->port);
new_vlan[match].type_entry = SJA1110_VLAN_D_TAG;
}
return 0;
}
static int sja1105_build_vlan_table(struct sja1105_private *priv)
{
struct sja1105_vlan_lookup_entry *new_vlan;
struct sja1105_table *table;
int rc, i;
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
new_vlan = kcalloc(VLAN_N_VID,
table->ops->unpacked_entry_size, GFP_KERNEL);
if (!new_vlan)
return -ENOMEM;
for (i = 0; i < VLAN_N_VID; i++)
new_vlan[i].vlanid = VLAN_N_VID;
/* Bridge VLANs */
rc = sja1105_build_bridge_vlans(priv, new_vlan);
if (rc)
goto out;
/* VLANs necessary for dsa_8021q operation, given to us by tag_8021q.c:
* - RX VLANs
* - TX VLANs
* - Crosschip links
*/
rc = sja1105_build_dsa_8021q_vlans(priv, new_vlan);
if (rc)
goto out;
rc = sja1105_commit_vlans(priv, new_vlan);
if (rc)
goto out;
rc = sja1105_commit_pvid(priv);
if (rc)
goto out;
out:
kfree(new_vlan);
return rc;
}
/* The TPID setting belongs to the General Parameters table,
* which can only be partially reconfigured at runtime (and not the TPID).
* So a switch reset is required.
......@@ -2275,9 +2105,14 @@ int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,
l2_lookup_params = table->entries;
l2_lookup_params->shared_learn = !priv->vlan_aware;
rc = sja1105_build_vlan_table(priv);
if (rc)
return rc;
for (port = 0; port < ds->num_ports; port++) {
if (dsa_is_unused_port(ds, port))
continue;
rc = sja1105_commit_pvid(ds, port);
if (rc)
return rc;
}
rc = sja1105_static_config_reload(priv, SJA1105_VLAN_FILTERING);
if (rc)
......@@ -2286,71 +2121,86 @@ int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,
return rc;
}
/* Returns number of VLANs added (0 or 1) on success,
* or a negative error code.
*/
static int sja1105_vlan_add_one(struct dsa_switch *ds, int port, u16 vid,
u16 flags, struct list_head *vlan_list)
{
bool untagged = flags & BRIDGE_VLAN_INFO_UNTAGGED;
bool pvid = flags & BRIDGE_VLAN_INFO_PVID;
struct sja1105_bridge_vlan *v;
list_for_each_entry(v, vlan_list, list) {
if (v->port == port && v->vid == vid) {
/* Already added */
if (v->untagged == untagged && v->pvid == pvid)
/* Nothing changed */
return 0;
/* It's the same VLAN, but some of the flags changed
* and the user did not bother to delete it first.
* Update it and trigger sja1105_build_vlan_table.
*/
v->untagged = untagged;
v->pvid = pvid;
return 1;
}
}
static int sja1105_vlan_add(struct sja1105_private *priv, int port, u16 vid,
u16 flags)
{
struct sja1105_vlan_lookup_entry *vlan;
struct sja1105_table *table;
int match, rc;
v = kzalloc(sizeof(*v), GFP_KERNEL);
if (!v) {
dev_err(ds->dev, "Out of memory while storing VLAN\n");
return -ENOMEM;
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
match = sja1105_is_vlan_configured(priv, vid);
if (match < 0) {
rc = sja1105_table_resize(table, table->entry_count + 1);
if (rc)
return rc;
match = table->entry_count - 1;
}
v->port = port;
v->vid = vid;
v->untagged = untagged;
v->pvid = pvid;
list_add(&v->list, vlan_list);
/* Assign pointer after the resize (it's new memory) */
vlan = table->entries;
vlan[match].type_entry = SJA1110_VLAN_D_TAG;
vlan[match].vlanid = vid;
vlan[match].vlan_bc |= BIT(port);
vlan[match].vmemb_port |= BIT(port);
if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
vlan[match].tag_port &= ~BIT(port);
else
vlan[match].tag_port |= BIT(port);
return 1;
return sja1105_dynamic_config_write(priv, BLK_IDX_VLAN_LOOKUP, vid,
&vlan[match], true);
}
/* Returns number of VLANs deleted (0 or 1) */
static int sja1105_vlan_del_one(struct dsa_switch *ds, int port, u16 vid,
struct list_head *vlan_list)
static int sja1105_vlan_del(struct sja1105_private *priv, int port, u16 vid)
{
struct sja1105_bridge_vlan *v, *n;
struct sja1105_vlan_lookup_entry *vlan;
struct sja1105_table *table;
bool keep = true;
int match, rc;
list_for_each_entry_safe(v, n, vlan_list, list) {
if (v->port == port && v->vid == vid) {
list_del(&v->list);
kfree(v);
return 1;
}
}
table = &priv->static_config.tables[BLK_IDX_VLAN_LOOKUP];
match = sja1105_is_vlan_configured(priv, vid);
/* Can't delete a missing entry. */
if (match < 0)
return 0;
/* Assign pointer after the resize (it's new memory) */
vlan = table->entries;
vlan[match].vlanid = vid;
vlan[match].vlan_bc &= ~BIT(port);
vlan[match].vmemb_port &= ~BIT(port);
/* Also unset tag_port, just so we don't have a confusing bitmap
* (no practical purpose).
*/
vlan[match].tag_port &= ~BIT(port);
/* If there's no port left as member of this VLAN,
* it's time for it to go.
*/
if (!vlan[match].vmemb_port)
keep = false;
rc = sja1105_dynamic_config_write(priv, BLK_IDX_VLAN_LOOKUP, vid,
&vlan[match], keep);
if (rc < 0)
return rc;
if (!keep)
return sja1105_table_delete_entry(table, match);
return 0;
}
static int sja1105_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan,
struct netlink_ext_ack *extack)
static int sja1105_bridge_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan,
struct netlink_ext_ack *extack)
{
struct sja1105_private *priv = ds->priv;
bool vlan_table_changed = false;
int rc;
/* Be sure to deny alterations to the configuration done by tag_8021q.
......@@ -2361,34 +2211,22 @@ static int sja1105_vlan_add(struct dsa_switch *ds, int port,
return -EBUSY;
}
rc = sja1105_vlan_add_one(ds, port, vlan->vid, vlan->flags,
&priv->bridge_vlans);
if (rc < 0)
rc = sja1105_vlan_add(priv, port, vlan->vid, vlan->flags);
if (rc)
return rc;
if (rc > 0)
vlan_table_changed = true;
if (!vlan_table_changed)
return 0;
if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
priv->bridge_pvid[port] = vlan->vid;
return sja1105_build_vlan_table(priv);
return sja1105_commit_pvid(ds, port);
}
static int sja1105_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
static int sja1105_bridge_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct sja1105_private *priv = ds->priv;
bool vlan_table_changed = false;
int rc;
rc = sja1105_vlan_del_one(ds, port, vlan->vid, &priv->bridge_vlans);
if (rc > 0)
vlan_table_changed = true;
if (!vlan_table_changed)
return 0;
return sja1105_build_vlan_table(priv);
return sja1105_vlan_del(priv, port, vlan->vid);
}
static int sja1105_dsa_8021q_vlan_add(struct dsa_switch *ds, int port, u16 vid,
......@@ -2397,23 +2235,21 @@ static int sja1105_dsa_8021q_vlan_add(struct dsa_switch *ds, int port, u16 vid,
struct sja1105_private *priv = ds->priv;
int rc;
rc = sja1105_vlan_add_one(ds, port, vid, flags, &priv->dsa_8021q_vlans);
if (rc <= 0)
rc = sja1105_vlan_add(priv, port, vid, flags);
if (rc)
return rc;
return sja1105_build_vlan_table(priv);
if (flags & BRIDGE_VLAN_INFO_PVID)
priv->tag_8021q_pvid[port] = vid;
return sja1105_commit_pvid(ds, port);
}
static int sja1105_dsa_8021q_vlan_del(struct dsa_switch *ds, int port, u16 vid)
{
struct sja1105_private *priv = ds->priv;
int rc;
rc = sja1105_vlan_del_one(ds, port, vid, &priv->dsa_8021q_vlans);
if (!rc)
return 0;
return sja1105_build_vlan_table(priv);
return sja1105_vlan_del(priv, port, vid);
}
/* The programming model for the SJA1105 switch is "all-at-once" via static
......@@ -2531,7 +2367,6 @@ static int sja1105_setup(struct dsa_switch *ds)
static void sja1105_teardown(struct dsa_switch *ds)
{
struct sja1105_private *priv = ds->priv;
struct sja1105_bridge_vlan *v, *n;
int port;
rtnl_lock();
......@@ -2553,16 +2388,6 @@ static void sja1105_teardown(struct dsa_switch *ds)
sja1105_tas_teardown(ds);
sja1105_ptp_clock_unregister(ds);
sja1105_static_config_free(&priv->static_config);
list_for_each_entry_safe(v, n, &priv->dsa_8021q_vlans, list) {
list_del(&v->list);
kfree(v);
}
list_for_each_entry_safe(v, n, &priv->bridge_vlans, list) {
list_del(&v->list);
kfree(v);
}
}
static void sja1105_port_disable(struct dsa_switch *ds, int port)
......@@ -3002,8 +2827,8 @@ static const struct dsa_switch_ops sja1105_switch_ops = {
.port_bridge_flags = sja1105_port_bridge_flags,
.port_stp_state_set = sja1105_bridge_stp_state_set,
.port_vlan_filtering = sja1105_vlan_filtering,
.port_vlan_add = sja1105_vlan_add,
.port_vlan_del = sja1105_vlan_del,
.port_vlan_add = sja1105_bridge_vlan_add,
.port_vlan_del = sja1105_bridge_vlan_del,
.port_mdb_add = sja1105_mdb_add,
.port_mdb_del = sja1105_mdb_del,
.port_hwtstamp_get = sja1105_hwtstamp_get,
......@@ -3164,9 +2989,6 @@ static int sja1105_probe(struct spi_device *spi)
mutex_init(&priv->ptp_data.lock);
mutex_init(&priv->mgmt_lock);
INIT_LIST_HEAD(&priv->bridge_vlans);
INIT_LIST_HEAD(&priv->dsa_8021q_vlans);
sja1105_tas_setup(ds);
sja1105_flower_setup(ds);
......
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