> Introduce the DPAA2 Ethernet Switch driver, which manages Datapath Switch
> (DPSW) objects discovered on the MC bus.
>
> Suggested-by: Alexandru Marginean <alexandru.marginean@xxxxxxx>
> Signed-off-by: Razvan Stefanescu <razvan.stefanescu@xxxxxxx>
> ---
> drivers/staging/fsl-dpaa2/ethsw/Makefile | 2 +-
> drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 1523 ++++++++++++++++++++++++++++++
> drivers/staging/fsl-dpaa2/ethsw/ethsw.h | 88 ++
> 3 files changed, 1612 insertions(+), 1 deletion(-)
> create mode 100644 drivers/staging/fsl-dpaa2/ethsw/ethsw.c
> create mode 100644 drivers/staging/fsl-dpaa2/ethsw/ethsw.h
>
> diff --git a/drivers/staging/fsl-dpaa2/ethsw/Makefile b/drivers/staging/fsl-
> dpaa2/ethsw/Makefile
> index db137f7..a6d72d1 100644
> --- a/drivers/staging/fsl-dpaa2/ethsw/Makefile
> +++ b/drivers/staging/fsl-dpaa2/ethsw/Makefile
> @@ -4,4 +4,4 @@
>
> obj-$(CONFIG_FSL_DPAA2_ETHSW) += dpaa2-ethsw.o
>
> -dpaa2-ethsw-objs := dpsw.o
> +dpaa2-ethsw-objs := ethsw.o dpsw.o
> diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-
> dpaa2/ethsw/ethsw.c
> new file mode 100644
> index 0000000..ae86078
> --- /dev/null
> +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
> @@ -0,0 +1,1523 @@
> +/* Copyright 2014-2016 Freescale Semiconductor Inc.
> + * Copyright 2017 NXP
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are met:
> + * * Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * * Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + * * Neither the name of the above-listed copyright holders nor the
> + * names of any contributors may be used to endorse or promote products
> + * derived from this software without specific prior written permission.
> + *
> + *
> + * ALTERNATIVELY, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") as published by the Free Software
> + * Foundation, either version 2 of that License or (at your option) any
> + * later version.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#include <linux/module.h>
> +
> +#include <linux/interrupt.h>
> +#include <linux/msi.h>
> +#include <linux/kthread.h>
> +#include <linux/workqueue.h>
> +
> +#include "../../fsl-mc/include/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_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;
> + bool is_oper;
> + int err, err2;
Mild suggestion - s/err2/ret/, just because it sounds better, at least to me (same for similar situations in the rest of the file).
> +
> + 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,
> + };
> +
> + /* 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) {
> + /* Delete previous PVID info and mark the new one */
> + if (port_priv->pvid)
> + port_priv->vlans[port_priv->pvid]
> + ^= ETHSW_VLAN_PVID;
Can it be " &= ~ETHSW_VLAN_PVID" ? Are there other implications?
> +
> + port_priv->vlans[vid] |= ETHSW_VLAN_PVID;
> + port_priv->pvid = vid;
> + } else {
> + netdev_err(netdev, "dpsw_if_set_tci err %d\n", err);
> + }
> +
> + if (is_oper) {
> + err2 = dpsw_if_enable(ethsw->mc_io, 0,
> + ethsw->dpsw_handle,
> + port_priv->idx);
> + if (err2) {
> + netdev_err(netdev,
> + "dpsw_if_enable err %d\n", err2);
> + return err2;
> + }
> + }
> + }
> +
> + return err;
> +}
> +
> +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, (int)flag);
Why is this cast necessary? Can't the API be reworked to use u8 (or, better yet, bool) instead of int?
> + 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);
> + if (err)
> + 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);
> + if (err)
> + 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);
> + if (err)
> + 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(int irq_num, void *arg)
> +{
> + return IRQ_WAKE_THREAD;
> +}
> +
> +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,
> + ethsw_irq0_handler,
> + 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;
> +
> + irq = sw_dev->irqs[DPSW_IRQ_INDEX_IF];
> + dpsw_set_irq_enable(ethsw->mc_io, 0, ethsw->dpsw_handle,
> + DPSW_IRQ_INDEX_IF, 0);
You can still print an error message here, in case something goes wrong.
> + 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);
In the error case, shouldn't there be a "ethsw_port_fdb_del_mc" ?
> +
> + 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, err2;
> + bool is_oper;
> +
> + if (!port_priv->vlans[vid])
> + return -ENOENT;
> +
> + if (port_priv->vlans[vid] & ETHSW_VLAN_PVID) {
> + struct dpsw_tci_cfg tci_cfg = { 0 };
> + /* 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);
> + goto exit_err;
> + }
> + }
> +
> + err = dpsw_if_set_tci(ethsw->mc_io, 0,
> + ethsw->dpsw_handle,
> + port_priv->idx, &tci_cfg);
> + if (!err) {
> + port_priv->vlans[vid] &= ~ETHSW_VLAN_PVID;
> + port_priv->pvid = 0;
> + } else {
> + netdev_err(netdev, "dpsw_if_set_tci err %d\n", err);
> + }
> +
> + if (is_oper) {
> + err2 = dpsw_if_enable(ethsw->mc_io, 0,
> + ethsw->dpsw_handle,
> + port_priv->idx);
> + if (err2) {
> + netdev_err(netdev, "dpsw_if_enable err %d\n",
> + err2);
> + return err2;
> + }
> + }
> +
> + if (err)
> + goto exit_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)
> + goto exit_err;
> + }
> +
> + return 0;
> +exit_err:
> + return err;
> +}
> +
> +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 ethsw_port_priv *port_priv = netdev_priv(netdev);
> +
> + /* Enable flooding */
> + return ethsw_port_set_flood(port_priv, 1);
> +}
> +
> +static int port_bridge_leave(struct net_device *netdev)
> +{
> + struct ethsw_port_priv *port_priv = netdev_priv(netdev);
> +
> + /* Disable flooding */
> + return ethsw_port_set_flood(port_priv, 0);
> +}
> +
> +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 != ðsw_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);
> + 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:
> + ethsw_port_fdb_add_uc(netdev_priv(dev), fdb_info->addr);
> + break;
> + case SWITCHDEV_FDB_DEL_TO_DEVICE:
> + ethsw_port_fdb_del_uc(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)
Minor formatting error, tab in function signature - see following function as well.
> +{
> + 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;
> +
> + destroy_workqueue(ethsw_owq);
If workqueue is destroyed here, shouldn't it be alloc'd in ethsw_open?
> +
> + 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, ðsw->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,
> + ðsw->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 = 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);
> + 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_takedown(struct fsl_mc_device *sw_dev)
> +{
> + struct device *dev = &sw_dev->dev;
> + struct ethsw_core *ethsw = dev_get_drvdata(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);
Above 2 can be grouped into ethsw_unregister_notifier.
> +
> + 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);
> +
> + 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 = ðsw_port_ops;
> + port_netdev->switchdev_ops = ðsw_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 err;
> + u16 i, j;
> +
> + /* 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, ðsw->mc_io);
> + if (err) {
> + 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) {
> + /* Cleanup previous ports only */
> + for (j = 0; j < i; j++) {
I think you can go with
for (i--; i >= 0; i--)
or better yet:
goto err_free_ports
and refactor err_free_ports to look like:
for (i--; i >= 0; i--) {
...
}
Best regards,
Bogdan P.
> + unregister_netdev(ethsw->ports[j]->netdev);
> + free_netdev(ethsw->ports[j]->netdev);
> + }
> + goto err_takedown;
> + }
> + }
> +
> + /* 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:
> + for (i = 0; i < ethsw->sw_attr.num_ifs; 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("Dual BSD/GPL");
> +MODULE_DESCRIPTION("DPAA2 Ethernet Switch Driver");
> diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.h b/drivers/staging/fsl-
> dpaa2/ethsw/ethsw.h
> new file mode 100644
> index 0000000..8c1d645
> --- /dev/null
> +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.h
> @@ -0,0 +1,88 @@
> +/* Copyright 2014-2017 Freescale Semiconductor Inc.
> + * Copyright 2017 NXP
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are met:
> + * * Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * * Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + * * Neither the name of the above-listed copyright holders nor the
> + * names of any contributors may be used to endorse or promote products
> + * derived from this software without specific prior written permission.
> + *
> + *
> + * ALTERNATIVELY, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") as published by the Free Software
> + * Foundation, either version 2 of that License or (at your option) any
> + * later version.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#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;
> +};
> +
> +/* 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 */
> --
> 1.9.1
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