diff options
| -rw-r--r-- | drivers/staging/fsl-dpaa2/ethsw/Makefile | 2 | ||||
| -rw-r--r-- | drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 1507 | ||||
| -rw-r--r-- | drivers/staging/fsl-dpaa2/ethsw/ethsw.h | 65 |
3 files changed, 1573 insertions, 1 deletions
diff --git a/drivers/staging/fsl-dpaa2/ethsw/Makefile b/drivers/staging/fsl-dpaa2/ethsw/Makefile index 9846e61c4ffd..7755603b1462 100644 --- a/drivers/staging/fsl-dpaa2/ethsw/Makefile +++ b/drivers/staging/fsl-dpaa2/ethsw/Makefile @@ -7,4 +7,4 @@ 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 000000000000..5aa6e95050c1 --- /dev/null +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c @@ -0,0 +1,1507 @@ +// 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 != 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, 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, 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 = 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 = 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 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, ðsw->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"); diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.h b/drivers/staging/fsl-dpaa2/ethsw/ethsw.h new file mode 100644 index 000000000000..da607b49d4ff --- /dev/null +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.h @@ -0,0 +1,65 @@ +// 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 */ |