linux/drivers/net/dsa/rtl8366.c

516 lines
11 KiB
C

// SPDX-License-Identifier: GPL-2.0
/* Realtek SMI library helpers for the RTL8366x variants
* RTL8366RB and RTL8366S
*
* Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
* Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2010 Antti Seppälä <a.seppala@gmail.com>
* Copyright (C) 2010 Roman Yeryomin <roman@advem.lv>
* Copyright (C) 2011 Colin Leitner <colin.leitner@googlemail.com>
*/
#include <linux/if_bridge.h>
#include <net/dsa.h>
#include "realtek-smi.h"
int rtl8366_mc_is_used(struct realtek_smi *smi, int mc_index, int *used)
{
int ret;
int i;
*used = 0;
for (i = 0; i < smi->num_ports; i++) {
int index = 0;
ret = smi->ops->get_mc_index(smi, i, &index);
if (ret)
return ret;
if (mc_index == index) {
*used = 1;
break;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_mc_is_used);
int rtl8366_set_vlan(struct realtek_smi *smi, int vid, u32 member,
u32 untag, u32 fid)
{
struct rtl8366_vlan_4k vlan4k;
int ret;
int i;
/* Update the 4K table */
ret = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
if (ret)
return ret;
vlan4k.member = member;
vlan4k.untag = untag;
vlan4k.fid = fid;
ret = smi->ops->set_vlan_4k(smi, &vlan4k);
if (ret)
return ret;
/* Try to find an existing MC entry for this VID */
for (i = 0; i < smi->num_vlan_mc; i++) {
struct rtl8366_vlan_mc vlanmc;
ret = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
if (vid == vlanmc.vid) {
/* update the MC entry */
vlanmc.member = member;
vlanmc.untag = untag;
vlanmc.fid = fid;
ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
break;
}
}
return ret;
}
EXPORT_SYMBOL_GPL(rtl8366_set_vlan);
int rtl8366_get_pvid(struct realtek_smi *smi, int port, int *val)
{
struct rtl8366_vlan_mc vlanmc;
int ret;
int index;
ret = smi->ops->get_mc_index(smi, port, &index);
if (ret)
return ret;
ret = smi->ops->get_vlan_mc(smi, index, &vlanmc);
if (ret)
return ret;
*val = vlanmc.vid;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_get_pvid);
int rtl8366_set_pvid(struct realtek_smi *smi, unsigned int port,
unsigned int vid)
{
struct rtl8366_vlan_mc vlanmc;
struct rtl8366_vlan_4k vlan4k;
int ret;
int i;
/* Try to find an existing MC entry for this VID */
for (i = 0; i < smi->num_vlan_mc; i++) {
ret = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
if (vid == vlanmc.vid) {
ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
ret = smi->ops->set_mc_index(smi, port, i);
return ret;
}
}
/* We have no MC entry for this VID, try to find an empty one */
for (i = 0; i < smi->num_vlan_mc; i++) {
ret = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
if (vlanmc.vid == 0 && vlanmc.member == 0) {
/* Update the entry from the 4K table */
ret = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
if (ret)
return ret;
vlanmc.vid = vid;
vlanmc.member = vlan4k.member;
vlanmc.untag = vlan4k.untag;
vlanmc.fid = vlan4k.fid;
ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
ret = smi->ops->set_mc_index(smi, port, i);
return ret;
}
}
/* MC table is full, try to find an unused entry and replace it */
for (i = 0; i < smi->num_vlan_mc; i++) {
int used;
ret = rtl8366_mc_is_used(smi, i, &used);
if (ret)
return ret;
if (!used) {
/* Update the entry from the 4K table */
ret = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
if (ret)
return ret;
vlanmc.vid = vid;
vlanmc.member = vlan4k.member;
vlanmc.untag = vlan4k.untag;
vlanmc.fid = vlan4k.fid;
ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
ret = smi->ops->set_mc_index(smi, port, i);
return ret;
}
}
dev_err(smi->dev,
"all VLAN member configurations are in use\n");
return -ENOSPC;
}
EXPORT_SYMBOL_GPL(rtl8366_set_pvid);
int rtl8366_enable_vlan4k(struct realtek_smi *smi, bool enable)
{
int ret;
/* To enable 4k VLAN, ordinary VLAN must be enabled first,
* but if we disable 4k VLAN it is fine to leave ordinary
* VLAN enabled.
*/
if (enable) {
/* Make sure VLAN is ON */
ret = smi->ops->enable_vlan(smi, true);
if (ret)
return ret;
smi->vlan_enabled = true;
}
ret = smi->ops->enable_vlan4k(smi, enable);
if (ret)
return ret;
smi->vlan4k_enabled = enable;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_enable_vlan4k);
int rtl8366_enable_vlan(struct realtek_smi *smi, bool enable)
{
int ret;
ret = smi->ops->enable_vlan(smi, enable);
if (ret)
return ret;
smi->vlan_enabled = enable;
/* If we turn VLAN off, make sure that we turn off
* 4k VLAN as well, if that happened to be on.
*/
if (!enable) {
smi->vlan4k_enabled = false;
ret = smi->ops->enable_vlan4k(smi, false);
}
return ret;
}
EXPORT_SYMBOL_GPL(rtl8366_enable_vlan);
int rtl8366_reset_vlan(struct realtek_smi *smi)
{
struct rtl8366_vlan_mc vlanmc;
int ret;
int i;
rtl8366_enable_vlan(smi, false);
rtl8366_enable_vlan4k(smi, false);
/* Clear the 16 VLAN member configurations */
vlanmc.vid = 0;
vlanmc.priority = 0;
vlanmc.member = 0;
vlanmc.untag = 0;
vlanmc.fid = 0;
for (i = 0; i < smi->num_vlan_mc; i++) {
ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
int rtl8366_init_vlan(struct realtek_smi *smi)
{
int port;
int ret;
ret = rtl8366_reset_vlan(smi);
if (ret)
return ret;
/* Loop over the available ports, for each port, associate
* it with the VLAN (port+1)
*/
for (port = 0; port < smi->num_ports; port++) {
u32 mask;
if (port == smi->cpu_port)
/* For the CPU port, make all ports members of this
* VLAN.
*/
mask = GENMASK(smi->num_ports - 1, 0);
else
/* For all other ports, enable itself plus the
* CPU port.
*/
mask = BIT(port) | BIT(smi->cpu_port);
/* For each port, set the port as member of VLAN (port+1)
* and untagged, except for the CPU port: the CPU port (5) is
* member of VLAN 6 and so are ALL the other ports as well.
* Use filter 0 (no filter).
*/
dev_info(smi->dev, "VLAN%d port mask for port %d, %08x\n",
(port + 1), port, mask);
ret = rtl8366_set_vlan(smi, (port + 1), mask, mask, 0);
if (ret)
return ret;
dev_info(smi->dev, "VLAN%d port %d, PVID set to %d\n",
(port + 1), port, (port + 1));
ret = rtl8366_set_pvid(smi, port, (port + 1));
if (ret)
return ret;
}
return rtl8366_enable_vlan(smi, true);
}
EXPORT_SYMBOL_GPL(rtl8366_init_vlan);
int rtl8366_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering)
{
struct realtek_smi *smi = ds->priv;
struct rtl8366_vlan_4k vlan4k;
int ret;
if (!smi->ops->is_vlan_valid(smi, port))
return -EINVAL;
dev_info(smi->dev, "%s filtering on port %d\n",
vlan_filtering ? "enable" : "disable",
port);
/* TODO:
* The hardware support filter ID (FID) 0..7, I have no clue how to
* support this in the driver when the callback only says on/off.
*/
ret = smi->ops->get_vlan_4k(smi, port, &vlan4k);
if (ret)
return ret;
/* Just set the filter to FID 1 for now then */
ret = rtl8366_set_vlan(smi, port,
vlan4k.member,
vlan4k.untag,
1);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_vlan_filtering);
int rtl8366_vlan_prepare(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct realtek_smi *smi = ds->priv;
int ret;
if (!smi->ops->is_vlan_valid(smi, port))
return -EINVAL;
dev_info(smi->dev, "prepare VLANs %04x..%04x\n",
vlan->vid_begin, vlan->vid_end);
/* Enable VLAN in the hardware
* FIXME: what's with this 4k business?
* Just rtl8366_enable_vlan() seems inconclusive.
*/
ret = rtl8366_enable_vlan4k(smi, true);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_vlan_prepare);
void rtl8366_vlan_add(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
bool untagged = !!(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED);
bool pvid = !!(vlan->flags & BRIDGE_VLAN_INFO_PVID);
struct realtek_smi *smi = ds->priv;
u32 member = 0;
u32 untag = 0;
u16 vid;
int ret;
if (!smi->ops->is_vlan_valid(smi, port))
return;
dev_info(smi->dev, "add VLAN on port %d, %s, %s\n",
port,
untagged ? "untagged" : "tagged",
pvid ? " PVID" : "no PVID");
if (dsa_is_dsa_port(ds, port) || dsa_is_cpu_port(ds, port))
dev_err(smi->dev, "port is DSA or CPU port\n");
for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
int pvid_val = 0;
dev_info(smi->dev, "add VLAN %04x\n", vid);
member |= BIT(port);
if (untagged)
untag |= BIT(port);
/* To ensure that we have a valid MC entry for this VLAN,
* initialize the port VLAN ID here.
*/
ret = rtl8366_get_pvid(smi, port, &pvid_val);
if (ret < 0) {
dev_err(smi->dev, "could not lookup PVID for port %d\n",
port);
return;
}
if (pvid_val == 0) {
ret = rtl8366_set_pvid(smi, port, vid);
if (ret < 0)
return;
}
}
ret = rtl8366_set_vlan(smi, port, member, untag, 0);
if (ret)
dev_err(smi->dev,
"failed to set up VLAN %04x",
vid);
}
EXPORT_SYMBOL_GPL(rtl8366_vlan_add);
int rtl8366_vlan_del(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
struct realtek_smi *smi = ds->priv;
u16 vid;
int ret;
dev_info(smi->dev, "del VLAN on port %d\n", port);
for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
int i;
dev_info(smi->dev, "del VLAN %04x\n", vid);
for (i = 0; i < smi->num_vlan_mc; i++) {
struct rtl8366_vlan_mc vlanmc;
ret = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (ret)
return ret;
if (vid == vlanmc.vid) {
/* clear VLAN member configurations */
vlanmc.vid = 0;
vlanmc.priority = 0;
vlanmc.member = 0;
vlanmc.untag = 0;
vlanmc.fid = 0;
ret = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (ret) {
dev_err(smi->dev,
"failed to remove VLAN %04x\n",
vid);
return ret;
}
break;
}
}
}
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_vlan_del);
void rtl8366_get_strings(struct dsa_switch *ds, int port, u32 stringset,
uint8_t *data)
{
struct realtek_smi *smi = ds->priv;
struct rtl8366_mib_counter *mib;
int i;
if (port >= smi->num_ports)
return;
for (i = 0; i < smi->num_mib_counters; i++) {
mib = &smi->mib_counters[i];
strncpy(data + i * ETH_GSTRING_LEN,
mib->name, ETH_GSTRING_LEN);
}
}
EXPORT_SYMBOL_GPL(rtl8366_get_strings);
int rtl8366_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
struct realtek_smi *smi = ds->priv;
/* We only support SS_STATS */
if (sset != ETH_SS_STATS)
return 0;
if (port >= smi->num_ports)
return -EINVAL;
return smi->num_mib_counters;
}
EXPORT_SYMBOL_GPL(rtl8366_get_sset_count);
void rtl8366_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data)
{
struct realtek_smi *smi = ds->priv;
int i;
int ret;
if (port >= smi->num_ports)
return;
for (i = 0; i < smi->num_mib_counters; i++) {
struct rtl8366_mib_counter *mib;
u64 mibvalue = 0;
mib = &smi->mib_counters[i];
ret = smi->ops->get_mib_counter(smi, port, mib, &mibvalue);
if (ret) {
dev_err(smi->dev, "error reading MIB counter %s\n",
mib->name);
}
data[i] = mibvalue;
}
}
EXPORT_SYMBOL_GPL(rtl8366_get_ethtool_stats);