Commit 44baaa43 authored by Razvan Stefanescu's avatar Razvan Stefanescu Committed by Greg Kroah-Hartman

staging: fsl-dpaa2/ethsw: Add Freescale DPAA2 Ethernet Switch driver

Introduce the DPAA2 Ethernet Switch driver, which manages Datapath Switch
(DPSW) objects discovered on the MC bus.
Suggested-by: default avatarAlexandru Marginean <alexandru.marginean@nxp.com>
Signed-off-by: default avatarRazvan Stefanescu <razvan.stefanescu@nxp.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0006351f
......@@ -7,4 +7,4 @@
obj-$(CONFIG_FSL_DPAA2_ETHSW) += dpaa2-ethsw.o
dpaa2-ethsw-objs := dpsw.o
dpaa2-ethsw-objs := ethsw.o dpsw.o
// SPDX-License-Identifier: GPL-2.0
/*
* DPAA2 Ethernet Switch driver
*
* Copyright 2014-2016 Freescale Semiconductor Inc.
* Copyright 2017-2018 NXP
*
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/msi.h>
#include <linux/kthread.h>
#include <linux/workqueue.h>
#include <linux/fsl/mc.h>
#include "ethsw.h"
static struct workqueue_struct *ethsw_owq;
/* Minimal supported DPSW version */
#define DPSW_MIN_VER_MAJOR 8
#define DPSW_MIN_VER_MINOR 0
#define DEFAULT_VLAN_ID 1
static int ethsw_add_vlan(struct ethsw_core *ethsw, u16 vid)
{
int err;
struct dpsw_vlan_cfg vcfg = {
.fdb_id = 0,
};
if (ethsw->vlans[vid]) {
dev_err(ethsw->dev, "VLAN already configured\n");
return -EEXIST;
}
err = dpsw_vlan_add(ethsw->mc_io, 0,
ethsw->dpsw_handle, vid, &vcfg);
if (err) {
dev_err(ethsw->dev, "dpsw_vlan_add err %d\n", err);
return err;
}
ethsw->vlans[vid] = ETHSW_VLAN_MEMBER;
return 0;
}
static int ethsw_port_set_tci(struct ethsw_port_priv *port_priv,
struct dpsw_tci_cfg *tci_cfg)
{
struct ethsw_core *ethsw = port_priv->ethsw_data;
struct net_device *netdev = port_priv->netdev;
bool is_oper;
int err, ret;
/* Interface needs to be down to change PVID */
is_oper = netif_oper_up(netdev);
if (is_oper) {
err = dpsw_if_disable(ethsw->mc_io, 0,
ethsw->dpsw_handle,
port_priv->idx);
if (err) {
netdev_err(netdev, "dpsw_if_disable err %d\n", err);
return err;
}
}
err = dpsw_if_set_tci(ethsw->mc_io, 0, ethsw->dpsw_handle,
port_priv->idx, tci_cfg);
if (err) {
netdev_err(netdev, "dpsw_if_set_tci err %d\n", err);
goto set_tci_error;
}
/* Delete previous PVID info and mark the new one */
if (port_priv->pvid)
port_priv->vlans[port_priv->pvid] &= ~ETHSW_VLAN_PVID;
port_priv->vlans[tci_cfg->vlan_id] |= ETHSW_VLAN_PVID;
port_priv->pvid = tci_cfg->vlan_id;
set_tci_error:
if (is_oper) {
ret = dpsw_if_enable(ethsw->mc_io, 0,
ethsw->dpsw_handle,
port_priv->idx);
if (ret) {
netdev_err(netdev, "dpsw_if_enable err %d\n", ret);
return ret;
}
}
return err;
}
static int ethsw_port_add_vlan(struct ethsw_port_priv *port_priv,
u16 vid, u16 flags)
{
struct ethsw_core *ethsw = port_priv->ethsw_data;
struct net_device *netdev = port_priv->netdev;
struct dpsw_vlan_if_cfg vcfg;
int err;
if (port_priv->vlans[vid]) {
netdev_warn(netdev, "VLAN %d already configured\n", vid);
return -EEXIST;
}
vcfg.num_ifs = 1;
vcfg.if_id[0] = port_priv->idx;
err = dpsw_vlan_add_if(ethsw->mc_io, 0, ethsw->dpsw_handle, vid, &vcfg);
if (err) {
netdev_err(netdev, "dpsw_vlan_add_if err %d\n", err);
return err;
}
port_priv->vlans[vid] = ETHSW_VLAN_MEMBER;
if (flags & BRIDGE_VLAN_INFO_UNTAGGED) {
err = dpsw_vlan_add_if_untagged(ethsw->mc_io, 0,
ethsw->dpsw_handle,
vid, &vcfg);
if (err) {
netdev_err(netdev,
"dpsw_vlan_add_if_untagged err %d\n", err);
return err;
}
port_priv->vlans[vid] |= ETHSW_VLAN_UNTAGGED;
}
if (flags & BRIDGE_VLAN_INFO_PVID) {
struct dpsw_tci_cfg tci_cfg = {
.pcp = 0,
.dei = 0,
.vlan_id = vid,
};
err = ethsw_port_set_tci(port_priv, &tci_cfg);
if (err)
return err;
}
return 0;
}
static int ethsw_set_learning(struct ethsw_core *ethsw, u8 flag)
{
enum dpsw_fdb_learning_mode learn_mode;
int err;
if (flag)
learn_mode = DPSW_FDB_LEARNING_MODE_HW;
else
learn_mode = DPSW_FDB_LEARNING_MODE_DIS;
err = dpsw_fdb_set_learning_mode(ethsw->mc_io, 0, ethsw->dpsw_handle, 0,
learn_mode);
if (err) {
dev_err(ethsw->dev, "dpsw_fdb_set_learning_mode err %d\n", err);
return err;
}
ethsw->learning = !!flag;
return 0;
}
static int ethsw_port_set_flood(struct ethsw_port_priv *port_priv, u8 flag)
{
int err;
err = dpsw_if_set_flooding(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx, flag);
if (err) {
netdev_err(port_priv->netdev,
"dpsw_fdb_set_learning_mode err %d\n", err);
return err;
}
port_priv->flood = !!flag;
return 0;
}
static int ethsw_port_set_stp_state(struct ethsw_port_priv *port_priv, u8 state)
{
struct dpsw_stp_cfg stp_cfg = {
.vlan_id = DEFAULT_VLAN_ID,
.state = state,
};
int err;
if (!netif_oper_up(port_priv->netdev) || state == port_priv->stp_state)
return 0; /* Nothing to do */
err = dpsw_if_set_stp(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx, &stp_cfg);
if (err) {
netdev_err(port_priv->netdev,
"dpsw_if_set_stp err %d\n", err);
return err;
}
port_priv->stp_state = state;
return 0;
}
static int ethsw_dellink_switch(struct ethsw_core *ethsw, u16 vid)
{
struct ethsw_port_priv *ppriv_local = NULL;
int i, err;
if (!ethsw->vlans[vid])
return -ENOENT;
err = dpsw_vlan_remove(ethsw->mc_io, 0, ethsw->dpsw_handle, vid);
if (err) {
dev_err(ethsw->dev, "dpsw_vlan_remove err %d\n", err);
return err;
}
ethsw->vlans[vid] = 0;
for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
ppriv_local = ethsw->ports[i];
ppriv_local->vlans[vid] = 0;
}
return 0;
}
static int ethsw_port_fdb_add_uc(struct ethsw_port_priv *port_priv,
const unsigned char *addr)
{
struct dpsw_fdb_unicast_cfg entry = {0};
int err;
entry.if_egress = port_priv->idx;
entry.type = DPSW_FDB_ENTRY_STATIC;
ether_addr_copy(entry.mac_addr, addr);
err = dpsw_fdb_add_unicast(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
0, &entry);
if (err)
netdev_err(port_priv->netdev,
"dpsw_fdb_add_unicast err %d\n", err);
return err;
}
static int ethsw_port_fdb_del_uc(struct ethsw_port_priv *port_priv,
const unsigned char *addr)
{
struct dpsw_fdb_unicast_cfg entry = {0};
int err;
entry.if_egress = port_priv->idx;
entry.type = DPSW_FDB_ENTRY_STATIC;
ether_addr_copy(entry.mac_addr, addr);
err = dpsw_fdb_remove_unicast(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
0, &entry);
/* Silently discard error for calling multiple times the del command */
if (err && err != -ENXIO)
netdev_err(port_priv->netdev,
"dpsw_fdb_remove_unicast err %d\n", err);
return err;
}
static int ethsw_port_fdb_add_mc(struct ethsw_port_priv *port_priv,
const unsigned char *addr)
{
struct dpsw_fdb_multicast_cfg entry = {0};
int err;
ether_addr_copy(entry.mac_addr, addr);
entry.type = DPSW_FDB_ENTRY_STATIC;
entry.num_ifs = 1;
entry.if_id[0] = port_priv->idx;
err = dpsw_fdb_add_multicast(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
0, &entry);
/* Silently discard error for calling multiple times the add command */
if (err && err != -ENXIO)
netdev_err(port_priv->netdev, "dpsw_fdb_add_multicast err %d\n",
err);
return err;
}
static int ethsw_port_fdb_del_mc(struct ethsw_port_priv *port_priv,
const unsigned char *addr)
{
struct dpsw_fdb_multicast_cfg entry = {0};
int err;
ether_addr_copy(entry.mac_addr, addr);
entry.type = DPSW_FDB_ENTRY_STATIC;
entry.num_ifs = 1;
entry.if_id[0] = port_priv->idx;
err = dpsw_fdb_remove_multicast(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
0, &entry);
/* Silently discard error for calling multiple times the del command */
if (err && err != -ENAVAIL)
netdev_err(port_priv->netdev,
"dpsw_fdb_remove_multicast err %d\n", err);
return err;
}
static void port_get_stats(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
u64 tmp;
int err;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_ING_FRAME, &stats->rx_packets);
if (err)
goto error;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_EGR_FRAME, &stats->tx_packets);
if (err)
goto error;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_ING_BYTE, &stats->rx_bytes);
if (err)
goto error;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_EGR_BYTE, &stats->tx_bytes);
if (err)
goto error;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_ING_FRAME_DISCARD,
&stats->rx_dropped);
if (err)
goto error;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_ING_FLTR_FRAME,
&tmp);
if (err)
goto error;
stats->rx_dropped += tmp;
err = dpsw_if_get_counter(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
DPSW_CNT_EGR_FRAME_DISCARD,
&stats->tx_dropped);
if (err)
goto error;
return;
error:
netdev_err(netdev, "dpsw_if_get_counter err %d\n", err);
}
static bool port_has_offload_stats(const struct net_device *netdev,
int attr_id)
{
return (attr_id == IFLA_OFFLOAD_XSTATS_CPU_HIT);
}
static int port_get_offload_stats(int attr_id,
const struct net_device *netdev,
void *sp)
{
switch (attr_id) {
case IFLA_OFFLOAD_XSTATS_CPU_HIT:
port_get_stats((struct net_device *)netdev, sp);
return 0;
}
return -EINVAL;
}
static int port_change_mtu(struct net_device *netdev, int mtu)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err;
err = dpsw_if_set_max_frame_length(port_priv->ethsw_data->mc_io,
0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx,
(u16)ETHSW_L2_MAX_FRM(mtu));
if (err) {
netdev_err(netdev,
"dpsw_if_set_max_frame_length() err %d\n", err);
return err;
}
netdev->mtu = mtu;
return 0;
}
static int port_carrier_state_sync(struct net_device *netdev)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
struct dpsw_link_state state;
int err;
err = dpsw_if_get_link_state(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx, &state);
if (err) {
netdev_err(netdev, "dpsw_if_get_link_state() err %d\n", err);
return err;
}
WARN_ONCE(state.up > 1, "Garbage read into link_state");
if (state.up != port_priv->link_state) {
if (state.up)
netif_carrier_on(netdev);
else
netif_carrier_off(netdev);
port_priv->link_state = state.up;
}
return 0;
}
static int port_open(struct net_device *netdev)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err;
/* No need to allow Tx as control interface is disabled */
netif_tx_stop_all_queues(netdev);
err = dpsw_if_enable(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx);
if (err) {
netdev_err(netdev, "dpsw_if_enable err %d\n", err);
return err;
}
/* sync carrier state */
err = port_carrier_state_sync(netdev);
if (err) {
netdev_err(netdev,
"port_carrier_state_sync err %d\n", err);
goto err_carrier_sync;
}
return 0;
err_carrier_sync:
dpsw_if_disable(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx);
return err;
}
static int port_stop(struct net_device *netdev)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err;
err = dpsw_if_disable(port_priv->ethsw_data->mc_io, 0,
port_priv->ethsw_data->dpsw_handle,
port_priv->idx);
if (err) {
netdev_err(netdev, "dpsw_if_disable err %d\n", err);
return err;
}
return 0;
}
static netdev_tx_t port_dropframe(struct sk_buff *skb,
struct net_device *netdev)
{
/* we don't support I/O for now, drop the frame */
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
static const struct net_device_ops ethsw_port_ops = {
.ndo_open = port_open,
.ndo_stop = port_stop,
.ndo_set_mac_address = eth_mac_addr,
.ndo_change_mtu = port_change_mtu,
.ndo_has_offload_stats = port_has_offload_stats,
.ndo_get_offload_stats = port_get_offload_stats,
.ndo_start_xmit = port_dropframe,
};
static void ethsw_links_state_update(struct ethsw_core *ethsw)
{
int i;
for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
port_carrier_state_sync(ethsw->ports[i]->netdev);
}
static irqreturn_t ethsw_irq0_handler_thread(int irq_num, void *arg)
{
struct device *dev = (struct device *)arg;
struct ethsw_core *ethsw = dev_get_drvdata(dev);
/* Mask the events and the if_id reserved bits to be cleared on read */
u32 status = DPSW_IRQ_EVENT_LINK_CHANGED | 0xFFFF0000;
int err;
err = dpsw_get_irq_status(ethsw->mc_io, 0, ethsw->dpsw_handle,
DPSW_IRQ_INDEX_IF, &status);
if (err) {
dev_err(dev, "Can't get irq status (err %d)", err);
err = dpsw_clear_irq_status(ethsw->mc_io, 0, ethsw->dpsw_handle,
DPSW_IRQ_INDEX_IF, 0xFFFFFFFF);
if (err)
dev_err(dev, "Can't clear irq status (err %d)", err);
goto out;
}
if (status & DPSW_IRQ_EVENT_LINK_CHANGED)
ethsw_links_state_update(ethsw);
out:
return IRQ_HANDLED;
}
static int ethsw_setup_irqs(struct fsl_mc_device *sw_dev)
{
struct device *dev = &sw_dev->dev;
struct ethsw_core *ethsw = dev_get_drvdata(dev);
u32 mask = DPSW_IRQ_EVENT_LINK_CHANGED;
struct fsl_mc_device_irq *irq;
int err;
err = fsl_mc_allocate_irqs(sw_dev);
if (err) {
dev_err(dev, "MC irqs allocation failed\n");
return err;
}
if (WARN_ON(sw_dev->obj_desc.irq_count != DPSW_IRQ_NUM)) {
err = -EINVAL;
goto free_irq;
}
err = dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
DPSW_IRQ_INDEX_IF, 0);
if (err) {
dev_err(dev, "dpsw_set_irq_enable err %d\n", err);
goto free_irq;
}
irq = sw_dev->irqs[DPSW_IRQ_INDEX_IF];
err = devm_request_threaded_irq(dev, irq->msi_desc->irq,
NULL,
ethsw_irq0_handler_thread,
IRQF_NO_SUSPEND | IRQF_ONESHOT,
dev_name(dev), dev);
if (err) {
dev_err(dev, "devm_request_threaded_irq(): %d", err);
goto free_irq;
}
err = dpsw_set_irq_mask(ethsw->mc_io, 0, ethsw->dpsw_handle,
DPSW_IRQ_INDEX_IF, mask);
if (err) {
dev_err(dev, "dpsw_set_irq_mask(): %d", err);
goto free_devm_irq;
}
err = dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
DPSW_IRQ_INDEX_IF, 1);
if (err) {
dev_err(dev, "dpsw_set_irq_enable(): %d", err);
goto free_devm_irq;
}
return 0;
free_devm_irq:
devm_free_irq(dev, irq->msi_desc->irq, dev);
free_irq:
fsl_mc_free_irqs(sw_dev);
return err;
}
static void ethsw_teardown_irqs(struct fsl_mc_device *sw_dev)
{
struct device *dev = &sw_dev->dev;
struct ethsw_core *ethsw = dev_get_drvdata(dev);
struct fsl_mc_device_irq *irq;
int err;
irq = sw_dev->irqs[DPSW_IRQ_INDEX_IF];
err = dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
DPSW_IRQ_INDEX_IF, 0);
if (err)
dev_err(dev, "dpsw_set_irq_enable err %d\n", err);
fsl_mc_free_irqs(sw_dev);
}
static int swdev_port_attr_get(struct net_device *netdev,
struct switchdev_attr *attr)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
attr->u.ppid.id_len = 1;
attr->u.ppid.id[0] = port_priv->ethsw_data->dev_id;
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
attr->u.brport_flags =
(port_priv->ethsw_data->learning ? BR_LEARNING : 0) |
(port_priv->flood ? BR_FLOOD : 0);
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
attr->u.brport_flags_support = BR_LEARNING | BR_FLOOD;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int port_attr_stp_state_set(struct net_device *netdev,
struct switchdev_trans *trans,
u8 state)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
if (switchdev_trans_ph_prepare(trans))
return 0;
return ethsw_port_set_stp_state(port_priv, state);
}
static int port_attr_br_flags_set(struct net_device *netdev,
struct switchdev_trans *trans,
unsigned long flags)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err = 0;
if (switchdev_trans_ph_prepare(trans))
return 0;
/* Learning is enabled per switch */
err = ethsw_set_learning(port_priv->ethsw_data, flags & BR_LEARNING);
if (err)
goto exit;
err = ethsw_port_set_flood(port_priv, flags & BR_FLOOD);
exit:
return err;
}
static int swdev_port_attr_set(struct net_device *netdev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
{
int err = 0;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
err = port_attr_stp_state_set(netdev, trans,
attr->u.stp_state);
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
err = port_attr_br_flags_set(netdev, trans,
attr->u.brport_flags);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
/* VLANs are supported by default */
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int port_vlans_add(struct net_device *netdev,
const struct switchdev_obj_port_vlan *vlan,
struct switchdev_trans *trans)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int vid, err;
if (switchdev_trans_ph_prepare(trans))
return 0;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
if (!port_priv->ethsw_data->vlans[vid]) {
/* this is a new VLAN */
err = ethsw_add_vlan(port_priv->ethsw_data, vid);
if (err)
return err;
port_priv->ethsw_data->vlans[vid] |= ETHSW_VLAN_GLOBAL;
}
err = ethsw_port_add_vlan(port_priv, vid, vlan->flags);
if (err)
break;
}
return err;
}
static int port_lookup_address(struct net_device *netdev, int is_uc,
const unsigned char *addr)
{
struct netdev_hw_addr_list *list = (is_uc) ? &netdev->uc : &netdev->mc;
struct netdev_hw_addr *ha;
netif_addr_lock_bh(netdev);
list_for_each_entry(ha, &list->list, list) {
if (ether_addr_equal(ha->addr, addr)) {
netif_addr_unlock_bh(netdev);
return 1;
}
}
netif_addr_unlock_bh(netdev);
return 0;
}
static int port_mdb_add(struct net_device *netdev,
const struct switchdev_obj_port_mdb *mdb,
struct switchdev_trans *trans)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err;
if (switchdev_trans_ph_prepare(trans))
return 0;
/* Check if address is already set on this port */
if (port_lookup_address(netdev, 0, mdb->addr))
return -EEXIST;
err = ethsw_port_fdb_add_mc(port_priv, mdb->addr);
if (err)
return err;
err = dev_mc_add(netdev, mdb->addr);
if (err) {
netdev_err(netdev, "dev_mc_add err %d\n", err);
ethsw_port_fdb_del_mc(port_priv, mdb->addr);
}
return err;
}
static int swdev_port_obj_add(struct net_device *netdev,
const struct switchdev_obj *obj,
struct switchdev_trans *trans)
{
int err;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = port_vlans_add(netdev,
SWITCHDEV_OBJ_PORT_VLAN(obj),
trans);
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
err = port_mdb_add(netdev,
SWITCHDEV_OBJ_PORT_MDB(obj),
trans);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int ethsw_port_del_vlan(struct ethsw_port_priv *port_priv, u16 vid)
{
struct ethsw_core *ethsw = port_priv->ethsw_data;
struct net_device *netdev = port_priv->netdev;
struct dpsw_vlan_if_cfg vcfg;
int i, err;
if (!port_priv->vlans[vid])
return -ENOENT;
if (port_priv->vlans[vid] & ETHSW_VLAN_PVID) {
struct dpsw_tci_cfg tci_cfg = { 0 };
err = ethsw_port_set_tci(port_priv, &tci_cfg);
if (err)
return err;
}
vcfg.num_ifs = 1;
vcfg.if_id[0] = port_priv->idx;
if (port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED) {
err = dpsw_vlan_remove_if_untagged(ethsw->mc_io, 0,
ethsw->dpsw_handle,
vid, &vcfg);
if (err) {
netdev_err(netdev,
"dpsw_vlan_remove_if_untagged err %d\n",
err);
}
port_priv->vlans[vid] &= ~ETHSW_VLAN_UNTAGGED;
}
if (port_priv->vlans[vid] & ETHSW_VLAN_MEMBER) {
err = dpsw_vlan_remove_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
vid, &vcfg);
if (err) {
netdev_err(netdev,
"dpsw_vlan_remove_if err %d\n", err);
return err;
}
port_priv->vlans[vid] &= ~ETHSW_VLAN_MEMBER;
/* Delete VLAN from switch if it is no longer configured on
* any port
*/
for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
if (ethsw->ports[i]->vlans[vid] & ETHSW_VLAN_MEMBER)
return 0; /* Found a port member in VID */
ethsw->vlans[vid] &= ~ETHSW_VLAN_GLOBAL;
err = ethsw_dellink_switch(ethsw, vid);
if (err)
return err;
}
return 0;
}
static int port_vlans_del(struct net_device *netdev,
const struct switchdev_obj_port_vlan *vlan)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int vid, err;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
err = ethsw_port_del_vlan(port_priv, vid);
if (err)
break;
}
return err;
}
static int port_mdb_del(struct net_device *netdev,
const struct switchdev_obj_port_mdb *mdb)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err;
if (!port_lookup_address(netdev, 0, mdb->addr))
return -ENOENT;
err = ethsw_port_fdb_del_mc(port_priv, mdb->addr);
if (err)
return err;
err = dev_mc_del(netdev, mdb->addr);
if (err) {
netdev_err(netdev, "dev_mc_del err %d\n", err);
return err;
}
return err;
}
static int swdev_port_obj_del(struct net_device *netdev,
const struct switchdev_obj *obj)
{
int err;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = port_vlans_del(netdev, SWITCHDEV_OBJ_PORT_VLAN(obj));
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
err = port_mdb_del(netdev, SWITCHDEV_OBJ_PORT_MDB(obj));
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static const struct switchdev_ops ethsw_port_switchdev_ops = {
.switchdev_port_attr_get = swdev_port_attr_get,
.switchdev_port_attr_set = swdev_port_attr_set,
.switchdev_port_obj_add = swdev_port_obj_add,
.switchdev_port_obj_del = swdev_port_obj_del,
};
/* For the moment, only flood setting needs to be updated */
static int port_bridge_join(struct net_device *netdev,
struct net_device *upper_dev)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
struct ethsw_core *ethsw = port_priv->ethsw_data;
int i, err;
for (i = 0; i < ethsw->sw_attr.num_ifs; i++)
if (ethsw->ports[i]->bridge_dev &&
(ethsw->ports[i]->bridge_dev != upper_dev)) {
netdev_err(netdev,
"Another switch port is connected to %s\n",
ethsw->ports[i]->bridge_dev->name);
return -EINVAL;
}
/* Enable flooding */
err = ethsw_port_set_flood(port_priv, 1);
if (!err)
port_priv->bridge_dev = upper_dev;
return err;
}
static int port_bridge_leave(struct net_device *netdev)
{
struct ethsw_port_priv *port_priv = netdev_priv(netdev);
int err;
/* Disable flooding */
err = ethsw_port_set_flood(port_priv, 0);
if (!err)
port_priv->bridge_dev = NULL;
return err;
}
static int port_netdevice_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
struct netdev_notifier_changeupper_info *info = ptr;
struct net_device *upper_dev;
int err = 0;
if (netdev->netdev_ops != &ethsw_port_ops)
return NOTIFY_DONE;
/* Handle just upper dev link/unlink for the moment */
if (event == NETDEV_CHANGEUPPER) {
upper_dev = info->upper_dev;
if (netif_is_bridge_master(upper_dev)) {
if (info->linking)
err = port_bridge_join(netdev, upper_dev);
else
err = port_bridge_leave(netdev);
}
}
return notifier_from_errno(err);
}
static struct notifier_block port_nb __read_mostly = {
.notifier_call = port_netdevice_event,
};
struct ethsw_switchdev_event_work {
struct work_struct work;
struct switchdev_notifier_fdb_info fdb_info;
struct net_device *dev;
unsigned long event;
};
static void ethsw_switchdev_event_work(struct work_struct *work)
{
struct ethsw_switchdev_event_work *switchdev_work =
container_of(work, struct ethsw_switchdev_event_work, work);
struct net_device *dev = switchdev_work->dev;
struct switchdev_notifier_fdb_info *fdb_info;
struct ethsw_port_priv *port_priv;
rtnl_lock();
port_priv = netdev_priv(dev);
fdb_info = &switchdev_work->fdb_info;
switch (switchdev_work->event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
if (is_unicast_ether_addr(fdb_info->addr))
ethsw_port_fdb_add_uc(netdev_priv(dev), fdb_info->addr);
else
ethsw_port_fdb_add_mc(netdev_priv(dev), fdb_info->addr);
break;
case SWITCHDEV_FDB_DEL_TO_DEVICE:
if (is_unicast_ether_addr(fdb_info->addr))
ethsw_port_fdb_del_uc(netdev_priv(dev), fdb_info->addr);
else
ethsw_port_fdb_del_mc(netdev_priv(dev), fdb_info->addr);
break;
}
rtnl_unlock();
kfree(switchdev_work->fdb_info.addr);
kfree(switchdev_work);
dev_put(dev);
}
/* Called under rcu_read_lock() */
static int port_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
struct ethsw_switchdev_event_work *switchdev_work;
struct switchdev_notifier_fdb_info *fdb_info = ptr;
switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
if (!switchdev_work)
return NOTIFY_BAD;
INIT_WORK(&switchdev_work->work, ethsw_switchdev_event_work);
switchdev_work->dev = dev;
switchdev_work->event = event;
switch (event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
case SWITCHDEV_FDB_DEL_TO_DEVICE:
memcpy(&switchdev_work->fdb_info, ptr,
sizeof(switchdev_work->fdb_info));
switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
if (!switchdev_work->fdb_info.addr)
goto err_addr_alloc;
ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
fdb_info->addr);
/* Take a reference on the device to avoid being freed. */
dev_hold(dev);
break;
default:
return NOTIFY_DONE;
}
queue_work(ethsw_owq, &switchdev_work->work);
return NOTIFY_DONE;
err_addr_alloc:
kfree(switchdev_work);
return NOTIFY_BAD;
}
static struct notifier_block port_switchdev_nb = {
.notifier_call = port_switchdev_event,
};
static int ethsw_register_notifier(struct device *dev)
{
int err;
err = register_netdevice_notifier(&port_nb);
if (err) {
dev_err(dev, "Failed to register netdev notifier\n");
return err;
}
err = register_switchdev_notifier(&port_switchdev_nb);
if (err) {
dev_err(dev, "Failed to register switchdev notifier\n");
goto err_switchdev_nb;
}
return 0;
err_switchdev_nb:
unregister_netdevice_notifier(&port_nb);
return err;
}
static int ethsw_open(struct ethsw_core *ethsw)
{
struct ethsw_port_priv *port_priv = NULL;
int i, err;
err = dpsw_enable(ethsw->mc_io, 0, ethsw->dpsw_handle);
if (err) {
dev_err(ethsw->dev, "dpsw_enable err %d\n", err);
return err;
}
for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
port_priv = ethsw->ports[i];
err = dev_open(port_priv->netdev);
if (err) {
netdev_err(port_priv->netdev, "dev_open err %d\n", err);
return err;
}
}
return 0;
}
static int ethsw_stop(struct ethsw_core *ethsw)
{
struct ethsw_port_priv *port_priv = NULL;
int i, err;
for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
port_priv = ethsw->ports[i];
dev_close(port_priv->netdev);
}
err = dpsw_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);
if (err) {
dev_err(ethsw->dev, "dpsw_disable err %d\n", err);
return err;
}
return 0;
}
static int ethsw_init(struct fsl_mc_device *sw_dev)
{
struct device *dev = &sw_dev->dev;
struct ethsw_core *ethsw = dev_get_drvdata(dev);
u16 version_major, version_minor, i;
struct dpsw_stp_cfg stp_cfg;
int err;
ethsw->dev_id = sw_dev->obj_desc.id;
err = dpsw_open(ethsw->mc_io, 0, ethsw->dev_id, &ethsw->dpsw_handle);
if (err) {
dev_err(dev, "dpsw_open err %d\n", err);
return err;
}
err = dpsw_get_attributes(ethsw->mc_io, 0, ethsw->dpsw_handle,
&ethsw->sw_attr);
if (err) {
dev_err(dev, "dpsw_get_attributes err %d\n", err);
goto err_close;
}
err = dpsw_get_api_version(ethsw->mc_io, 0,
&version_major,
&version_minor);
if (err) {
dev_err(dev, "dpsw_get_api_version err %d\n", err);
goto err_close;
}
/* Minimum supported DPSW version check */
if (version_major < DPSW_MIN_VER_MAJOR ||
(version_major == DPSW_MIN_VER_MAJOR &&
version_minor < DPSW_MIN_VER_MINOR)) {
dev_err(dev, "DPSW version %d:%d not supported. Use %d.%d or greater.\n",
version_major,
version_minor,
DPSW_MIN_VER_MAJOR, DPSW_MIN_VER_MINOR);
err = -ENOTSUPP;
goto err_close;
}
err = dpsw_reset(ethsw->mc_io, 0, ethsw->dpsw_handle);
if (err) {
dev_err(dev, "dpsw_reset err %d\n", err);
goto err_close;
}
err = dpsw_fdb_set_learning_mode(ethsw->mc_io, 0, ethsw->dpsw_handle, 0,
DPSW_FDB_LEARNING_MODE_HW);
if (err) {
dev_err(dev, "dpsw_fdb_set_learning_mode err %d\n", err);
goto err_close;
}
stp_cfg.vlan_id = DEFAULT_VLAN_ID;
stp_cfg.state = DPSW_STP_STATE_FORWARDING;
for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
err = dpsw_if_set_stp(ethsw->mc_io, 0, ethsw->dpsw_handle, i,
&stp_cfg);
if (err) {
dev_err(dev, "dpsw_if_set_stp err %d for port %d\n",
err, i);
goto err_close;
}
err = dpsw_if_set_broadcast(ethsw->mc_io, 0,
ethsw->dpsw_handle, i, 1);
if (err) {
dev_err(dev,
"dpsw_if_set_broadcast err %d for port %d\n",
err, i);
goto err_close;
}
}
ethsw_owq = alloc_ordered_workqueue("%s_ordered", WQ_MEM_RECLAIM,
"ethsw");
if (!ethsw_owq) {
err = -ENOMEM;
goto err_close;
}
err = ethsw_register_notifier(dev);
if (err)
goto err_destroy_ordered_workqueue;
return 0;
err_destroy_ordered_workqueue:
destroy_workqueue(ethsw_owq);
err_close:
dpsw_close(ethsw->mc_io, 0, ethsw->dpsw_handle);
return err;
}
static int ethsw_port_init(struct ethsw_port_priv *port_priv, u16 port)
{
const char def_mcast[ETH_ALEN] = {0x01, 0x00, 0x5e, 0x00, 0x00, 0x01};
struct net_device *netdev = port_priv->netdev;
struct ethsw_core *ethsw = port_priv->ethsw_data;
struct dpsw_tci_cfg tci_cfg = {0};
struct dpsw_vlan_if_cfg vcfg;
int err;
/* Switch starts with all ports configured to VLAN 1. Need to
* remove this setting to allow configuration at bridge join
*/
vcfg.num_ifs = 1;
vcfg.if_id[0] = port_priv->idx;
err = dpsw_vlan_remove_if_untagged(ethsw->mc_io, 0, ethsw->dpsw_handle,
DEFAULT_VLAN_ID, &vcfg);
if (err) {
netdev_err(netdev, "dpsw_vlan_remove_if_untagged err %d\n",
err);
return err;
}
err = ethsw_port_set_tci(port_priv, &tci_cfg);
if (err)
return err;
err = dpsw_vlan_remove_if(ethsw->mc_io, 0, ethsw->dpsw_handle,
DEFAULT_VLAN_ID, &vcfg);
if (err) {
netdev_err(netdev, "dpsw_vlan_remove_if err %d\n", err);
return err;
}
err = ethsw_port_fdb_add_mc(port_priv, def_mcast);
return err;
}
static void ethsw_unregister_notifier(struct device *dev)
{
int err;
err = unregister_switchdev_notifier(&port_switchdev_nb);
if (err)
dev_err(dev,
"Failed to unregister switchdev notifier (%d)\n", err);
err = unregister_netdevice_notifier(&port_nb);
if (err)
dev_err(dev,
"Failed to unregister netdev notifier (%d)\n", err);
}
static void ethsw_takedown(struct fsl_mc_device *sw_dev)
{
struct device *dev = &sw_dev->dev;
struct ethsw_core *ethsw = dev_get_drvdata(dev);
int err;
ethsw_unregister_notifier(dev);
err = dpsw_close(ethsw->mc_io, 0, ethsw->dpsw_handle);
if (err)
dev_warn(dev, "dpsw_close err %d\n", err);
}
static int ethsw_remove(struct fsl_mc_device *sw_dev)
{
struct ethsw_port_priv *port_priv;
struct ethsw_core *ethsw;
struct device *dev;
int i;
dev = &sw_dev->dev;
ethsw = dev_get_drvdata(dev);
ethsw_teardown_irqs(sw_dev);
destroy_workqueue(ethsw_owq);
rtnl_lock();
ethsw_stop(ethsw);
rtnl_unlock();
for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
port_priv = ethsw->ports[i];
unregister_netdev(port_priv->netdev);
free_netdev(port_priv->netdev);
}
kfree(ethsw->ports);
ethsw_takedown(sw_dev);
fsl_mc_portal_free(ethsw->mc_io);
kfree(ethsw);
dev_set_drvdata(dev, NULL);
return 0;
}
static int ethsw_probe_port(struct ethsw_core *ethsw, u16 port_idx)
{
struct ethsw_port_priv *port_priv;
struct device *dev = ethsw->dev;
struct net_device *port_netdev;
int err;
port_netdev = alloc_etherdev(sizeof(struct ethsw_port_priv));
if (!port_netdev) {
dev_err(dev, "alloc_etherdev error\n");
return -ENOMEM;
}
port_priv = netdev_priv(port_netdev);
port_priv->netdev = port_netdev;
port_priv->ethsw_data = ethsw;
port_priv->idx = port_idx;
port_priv->stp_state = BR_STATE_FORWARDING;
/* Flooding is implicitly enabled */
port_priv->flood = true;
SET_NETDEV_DEV(port_netdev, dev);
port_netdev->netdev_ops = &ethsw_port_ops;
port_netdev->switchdev_ops = &ethsw_port_switchdev_ops;
/* Set MTU limits */
port_netdev->min_mtu = ETH_MIN_MTU;
port_netdev->max_mtu = ETHSW_MAX_FRAME_LENGTH;
err = register_netdev(port_netdev);
if (err < 0) {
dev_err(dev, "register_netdev error %d\n", err);
free_netdev(port_netdev);
return err;
}
ethsw->ports[port_idx] = port_priv;
return ethsw_port_init(port_priv, port_idx);
}
static int ethsw_probe(struct fsl_mc_device *sw_dev)
{
struct device *dev = &sw_dev->dev;
struct ethsw_core *ethsw;
int i, err;
/* Allocate switch core*/
ethsw = kzalloc(sizeof(*ethsw), GFP_KERNEL);
if (!ethsw)
return -ENOMEM;
ethsw->dev = dev;
dev_set_drvdata(dev, ethsw);
err = fsl_mc_portal_allocate(sw_dev, 0, &ethsw->mc_io);
if (err) {
if (err == -ENXIO)
err = -EPROBE_DEFER;
else
dev_err(dev, "fsl_mc_portal_allocate err %d\n", err);
goto err_free_drvdata;
}
err = ethsw_init(sw_dev);
if (err)
goto err_free_cmdport;
/* DEFAULT_VLAN_ID is implicitly configured on the switch */
ethsw->vlans[DEFAULT_VLAN_ID] = ETHSW_VLAN_MEMBER;
/* Learning is implicitly enabled */
ethsw->learning = true;
ethsw->ports = kcalloc(ethsw->sw_attr.num_ifs, sizeof(*ethsw->ports),
GFP_KERNEL);
if (!(ethsw->ports)) {
err = -ENOMEM;
goto err_takedown;
}
for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
err = ethsw_probe_port(ethsw, i);
if (err)
goto err_free_ports;
}
/* Switch starts up enabled */
rtnl_lock();
err = ethsw_open(ethsw);
rtnl_unlock();
if (err)
goto err_free_ports;
/* Setup IRQs */
err = ethsw_setup_irqs(sw_dev);
if (err)
goto err_stop;
dev_info(dev, "probed %d port switch\n", ethsw->sw_attr.num_ifs);
return 0;
err_stop:
rtnl_lock();
ethsw_stop(ethsw);
rtnl_unlock();
err_free_ports:
/* Cleanup registered ports only */
for (i--; i >= 0; i--) {
unregister_netdev(ethsw->ports[i]->netdev);
free_netdev(ethsw->ports[i]->netdev);
}
kfree(ethsw->ports);
err_takedown:
ethsw_takedown(sw_dev);
err_free_cmdport:
fsl_mc_portal_free(ethsw->mc_io);
err_free_drvdata:
kfree(ethsw);
dev_set_drvdata(dev, NULL);
return err;
}
static const struct fsl_mc_device_id ethsw_match_id_table[] = {
{
.vendor = FSL_MC_VENDOR_FREESCALE,
.obj_type = "dpsw",
},
{ .vendor = 0x0 }
};
MODULE_DEVICE_TABLE(fslmc, ethsw_match_id_table);
static struct fsl_mc_driver eth_sw_drv = {
.driver = {
.name = KBUILD_MODNAME,
.owner = THIS_MODULE,
},
.probe = ethsw_probe,
.remove = ethsw_remove,
.match_id_table = ethsw_match_id_table
};
module_fsl_mc_driver(eth_sw_drv);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DPAA2 Ethernet Switch Driver");
// SPDX-License-Identifier: GPL-2.0
/*
* DPAA2 Ethernet Switch declarations
*
* Copyright 2014-2016 Freescale Semiconductor Inc.
* Copyright 2017-2018 NXP
*
*/
#ifndef __ETHSW_H
#define __ETHSW_H
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_vlan.h>
#include <uapi/linux/if_bridge.h>
#include <net/switchdev.h>
#include <linux/if_bridge.h>
#include "dpsw.h"
/* Number of IRQs supported */
#define DPSW_IRQ_NUM 2
#define ETHSW_VLAN_MEMBER 1
#define ETHSW_VLAN_UNTAGGED 2
#define ETHSW_VLAN_PVID 4
#define ETHSW_VLAN_GLOBAL 8
/* Maximum Frame Length supported by HW (currently 10k) */
#define DPAA2_MFL (10 * 1024)
#define ETHSW_MAX_FRAME_LENGTH (DPAA2_MFL - VLAN_ETH_HLEN - ETH_FCS_LEN)
#define ETHSW_L2_MAX_FRM(mtu) ((mtu) + VLAN_ETH_HLEN + ETH_FCS_LEN)
struct ethsw_core;
/* Per port private data */
struct ethsw_port_priv {
struct net_device *netdev;
u16 idx;
struct ethsw_core *ethsw_data;
u8 link_state;
u8 stp_state;
bool flood;
u8 vlans[VLAN_VID_MASK + 1];
u16 pvid;
struct net_device *bridge_dev;
};
/* Switch data */
struct ethsw_core {
struct device *dev;
struct fsl_mc_io *mc_io;
u16 dpsw_handle;
struct dpsw_attr sw_attr;
int dev_id;
struct ethsw_port_priv **ports;
u8 vlans[VLAN_VID_MASK + 1];
bool learning;
};
#endif /* __ETHSW_H */
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