Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

[mirror_ubuntu-hirsute-kernel.git] / drivers / net / dsa / ocelot / felix.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright 2019 NXP Semiconductors
 */
#include <uapi/linux/if_bridge.h>
#include <soc/mscc/ocelot_vcap.h>
#include <soc/mscc/ocelot_qsys.h>
#include <soc/mscc/ocelot_sys.h>
#include <soc/mscc/ocelot_dev.h>
#include <soc/mscc/ocelot_ana.h>
#include <soc/mscc/ocelot.h>
#include <linux/packing.h>
#include <linux/module.h>
#include <linux/of_net.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <net/pkt_sched.h>
#include <net/dsa.h>
#include "felix.h"

static enum dsa_tag_protocol felix_get_tag_protocol(struct dsa_switch *ds,
                                                    int port,
                                                    enum dsa_tag_protocol mp)
{
        return DSA_TAG_PROTO_OCELOT;
}

static int felix_set_ageing_time(struct dsa_switch *ds,
                                 unsigned int ageing_time)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_set_ageing_time(ocelot, ageing_time);

        return 0;
}

static int felix_fdb_dump(struct dsa_switch *ds, int port,
                          dsa_fdb_dump_cb_t *cb, void *data)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_fdb_dump(ocelot, port, cb, data);
}

static int felix_fdb_add(struct dsa_switch *ds, int port,
                         const unsigned char *addr, u16 vid)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_fdb_add(ocelot, port, addr, vid);
}

static int felix_fdb_del(struct dsa_switch *ds, int port,
                         const unsigned char *addr, u16 vid)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_fdb_del(ocelot, port, addr, vid);
}

static void felix_bridge_stp_state_set(struct dsa_switch *ds, int port,
                                       u8 state)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_bridge_stp_state_set(ocelot, port, state);
}

static int felix_bridge_join(struct dsa_switch *ds, int port,
                             struct net_device *br)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_port_bridge_join(ocelot, port, br);
}

static void felix_bridge_leave(struct dsa_switch *ds, int port,
                               struct net_device *br)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_port_bridge_leave(ocelot, port, br);
}

/* This callback needs to be present */
static int felix_vlan_prepare(struct dsa_switch *ds, int port,
                              const struct switchdev_obj_port_vlan *vlan)
{
        return 0;
}

static int felix_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_port_vlan_filtering(ocelot, port, enabled);

        return 0;
}

static void felix_vlan_add(struct dsa_switch *ds, int port,
                           const struct switchdev_obj_port_vlan *vlan)
{
        struct ocelot *ocelot = ds->priv;
        u16 vid;
        int err;

        for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
                err = ocelot_vlan_add(ocelot, port, vid,
                                      vlan->flags & BRIDGE_VLAN_INFO_PVID,
                                      vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED);
                if (err) {
                        dev_err(ds->dev, "Failed to add VLAN %d to port %d: %d\n",
                                vid, port, err);
                        return;
                }
        }
}

static int felix_vlan_del(struct dsa_switch *ds, int port,
                          const struct switchdev_obj_port_vlan *vlan)
{
        struct ocelot *ocelot = ds->priv;
        u16 vid;
        int err;

        for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
                err = ocelot_vlan_del(ocelot, port, vid);
                if (err) {
                        dev_err(ds->dev, "Failed to remove VLAN %d from port %d: %d\n",
                                vid, port, err);
                        return err;
                }
        }
        return 0;
}

static int felix_port_enable(struct dsa_switch *ds, int port,
                             struct phy_device *phy)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_port_enable(ocelot, port, phy);

        return 0;
}

static void felix_port_disable(struct dsa_switch *ds, int port)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_port_disable(ocelot, port);
}

static void felix_phylink_validate(struct dsa_switch *ds, int port,
                                   unsigned long *supported,
                                   struct phylink_link_state *state)
{
        struct ocelot *ocelot = ds->priv;
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };

        if (state->interface != PHY_INTERFACE_MODE_NA &&
            state->interface != ocelot_port->phy_mode) {
                bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
                return;
        }

        /* No half-duplex. */
        phylink_set_port_modes(mask);
        phylink_set(mask, Autoneg);
        phylink_set(mask, Pause);
        phylink_set(mask, Asym_Pause);
        phylink_set(mask, 10baseT_Full);
        phylink_set(mask, 100baseT_Full);
        phylink_set(mask, 1000baseT_Full);

        if (state->interface == PHY_INTERFACE_MODE_INTERNAL ||
            state->interface == PHY_INTERFACE_MODE_2500BASEX ||
            state->interface == PHY_INTERFACE_MODE_USXGMII) {
                phylink_set(mask, 2500baseT_Full);
                phylink_set(mask, 2500baseX_Full);
        }

        bitmap_and(supported, supported, mask,
                   __ETHTOOL_LINK_MODE_MASK_NBITS);
        bitmap_and(state->advertising, state->advertising, mask,
                   __ETHTOOL_LINK_MODE_MASK_NBITS);
}

static int felix_phylink_mac_pcs_get_state(struct dsa_switch *ds, int port,
                                           struct phylink_link_state *state)
{
        struct ocelot *ocelot = ds->priv;
        struct felix *felix = ocelot_to_felix(ocelot);

        if (felix->info->pcs_link_state)
                felix->info->pcs_link_state(ocelot, port, state);

        return 0;
}

static void felix_phylink_mac_config(struct dsa_switch *ds, int port,
                                     unsigned int link_an_mode,
                                     const struct phylink_link_state *state)
{
        struct ocelot *ocelot = ds->priv;
        struct ocelot_port *ocelot_port = ocelot->ports[port];
        struct felix *felix = ocelot_to_felix(ocelot);
        u32 mac_fc_cfg;

        /* Take port out of reset by clearing the MAC_TX_RST, MAC_RX_RST and
         * PORT_RST bits in CLOCK_CFG
         */
        ocelot_port_writel(ocelot_port, DEV_CLOCK_CFG_LINK_SPEED(state->speed),
                           DEV_CLOCK_CFG);

        /* Flow control. Link speed is only used here to evaluate the time
         * specification in incoming pause frames.
         */
        mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(state->speed);

        /* handle Rx pause in all cases, with 2500base-X this is used for rate
         * adaptation.
         */
        mac_fc_cfg |= SYS_MAC_FC_CFG_RX_FC_ENA;

        if (state->pause & MLO_PAUSE_TX)
                mac_fc_cfg |= SYS_MAC_FC_CFG_TX_FC_ENA |
                              SYS_MAC_FC_CFG_PAUSE_VAL_CFG(0xffff) |
                              SYS_MAC_FC_CFG_FC_LATENCY_CFG(0x7) |
                              SYS_MAC_FC_CFG_ZERO_PAUSE_ENA;
        ocelot_write_rix(ocelot, mac_fc_cfg, SYS_MAC_FC_CFG, port);

        ocelot_write_rix(ocelot, 0, ANA_POL_FLOWC, port);

        if (felix->info->pcs_init)
                felix->info->pcs_init(ocelot, port, link_an_mode, state);
}

static void felix_phylink_mac_an_restart(struct dsa_switch *ds, int port)
{
        struct ocelot *ocelot = ds->priv;
        struct felix *felix = ocelot_to_felix(ocelot);

        if (felix->info->pcs_an_restart)
                felix->info->pcs_an_restart(ocelot, port);
}

static void felix_phylink_mac_link_down(struct dsa_switch *ds, int port,
                                        unsigned int link_an_mode,
                                        phy_interface_t interface)
{
        struct ocelot *ocelot = ds->priv;
        struct ocelot_port *ocelot_port = ocelot->ports[port];

        ocelot_port_writel(ocelot_port, 0, DEV_MAC_ENA_CFG);
        ocelot_rmw_rix(ocelot, 0, QSYS_SWITCH_PORT_MODE_PORT_ENA,
                       QSYS_SWITCH_PORT_MODE, port);
}

static void felix_phylink_mac_link_up(struct dsa_switch *ds, int port,
                                      unsigned int link_an_mode,
                                      phy_interface_t interface,
                                      struct phy_device *phydev,
                                      int speed, int duplex,
                                      bool tx_pause, bool rx_pause)
{
        struct ocelot *ocelot = ds->priv;
        struct ocelot_port *ocelot_port = ocelot->ports[port];

        /* Enable MAC module */
        ocelot_port_writel(ocelot_port, DEV_MAC_ENA_CFG_RX_ENA |
                           DEV_MAC_ENA_CFG_TX_ENA, DEV_MAC_ENA_CFG);

        /* Enable receiving frames on the port, and activate auto-learning of
         * MAC addresses.
         */
        ocelot_write_gix(ocelot, ANA_PORT_PORT_CFG_LEARNAUTO |
                         ANA_PORT_PORT_CFG_RECV_ENA |
                         ANA_PORT_PORT_CFG_PORTID_VAL(port),
                         ANA_PORT_PORT_CFG, port);

        /* Core: Enable port for frame transfer */
        ocelot_write_rix(ocelot, QSYS_SWITCH_PORT_MODE_INGRESS_DROP_MODE |
                         QSYS_SWITCH_PORT_MODE_SCH_NEXT_CFG(1) |
                         QSYS_SWITCH_PORT_MODE_PORT_ENA,
                         QSYS_SWITCH_PORT_MODE, port);
}

static void felix_get_strings(struct dsa_switch *ds, int port,
                              u32 stringset, u8 *data)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_get_strings(ocelot, port, stringset, data);
}

static void felix_get_ethtool_stats(struct dsa_switch *ds, int port, u64 *data)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_get_ethtool_stats(ocelot, port, data);
}

static int felix_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_get_sset_count(ocelot, port, sset);
}

static int felix_get_ts_info(struct dsa_switch *ds, int port,
                             struct ethtool_ts_info *info)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_get_ts_info(ocelot, port, info);
}

static int felix_parse_ports_node(struct felix *felix,
                                  struct device_node *ports_node,
                                  phy_interface_t *port_phy_modes)
{
        struct ocelot *ocelot = &felix->ocelot;
        struct device *dev = felix->ocelot.dev;
        struct device_node *child;

        for_each_available_child_of_node(ports_node, child) {
                phy_interface_t phy_mode;
                u32 port;
                int err;

                /* Get switch port number from DT */
                if (of_property_read_u32(child, "reg", &port) < 0) {
                        dev_err(dev, "Port number not defined in device tree "
                                "(property \"reg\")\n");
                        of_node_put(child);
                        return -ENODEV;
                }

                /* Get PHY mode from DT */
                err = of_get_phy_mode(child, &phy_mode);
                if (err) {
                        dev_err(dev, "Failed to read phy-mode or "
                                "phy-interface-type property for port %d\n",
                                port);
                        of_node_put(child);
                        return -ENODEV;
                }

                err = felix->info->prevalidate_phy_mode(ocelot, port, phy_mode);
                if (err < 0) {
                        dev_err(dev, "Unsupported PHY mode %s on port %d\n",
                                phy_modes(phy_mode), port);
                        return err;
                }

                port_phy_modes[port] = phy_mode;
        }

        return 0;
}

static int felix_parse_dt(struct felix *felix, phy_interface_t *port_phy_modes)
{
        struct device *dev = felix->ocelot.dev;
        struct device_node *switch_node;
        struct device_node *ports_node;
        int err;

        switch_node = dev->of_node;

        ports_node = of_get_child_by_name(switch_node, "ports");
        if (!ports_node) {
                dev_err(dev, "Incorrect bindings: absent \"ports\" node\n");
                return -ENODEV;
        }

        err = felix_parse_ports_node(felix, ports_node, port_phy_modes);
        of_node_put(ports_node);

        return err;
}

static int felix_init_structs(struct felix *felix, int num_phys_ports)
{
        struct ocelot *ocelot = &felix->ocelot;
        phy_interface_t *port_phy_modes;
        resource_size_t switch_base;
        struct resource res;
        int port, i, err;

        ocelot->num_phys_ports = num_phys_ports;
        ocelot->ports = devm_kcalloc(ocelot->dev, num_phys_ports,
                                     sizeof(struct ocelot_port *), GFP_KERNEL);
        if (!ocelot->ports)
                return -ENOMEM;

        ocelot->map             = felix->info->map;
        ocelot->stats_layout    = felix->info->stats_layout;
        ocelot->num_stats       = felix->info->num_stats;
        ocelot->shared_queue_sz = felix->info->shared_queue_sz;
        ocelot->num_mact_rows   = felix->info->num_mact_rows;
        ocelot->vcap_is2_keys   = felix->info->vcap_is2_keys;
        ocelot->vcap_is2_actions= felix->info->vcap_is2_actions;
        ocelot->vcap            = felix->info->vcap;
        ocelot->ops             = felix->info->ops;

        port_phy_modes = kcalloc(num_phys_ports, sizeof(phy_interface_t),
                                 GFP_KERNEL);
        if (!port_phy_modes)
                return -ENOMEM;

        err = felix_parse_dt(felix, port_phy_modes);
        if (err) {
                kfree(port_phy_modes);
                return err;
        }

        switch_base = pci_resource_start(felix->pdev,
                                         felix->info->switch_pci_bar);

        for (i = 0; i < TARGET_MAX; i++) {
                struct regmap *target;

                if (!felix->info->target_io_res[i].name)
                        continue;

                memcpy(&res, &felix->info->target_io_res[i], sizeof(res));
                res.flags = IORESOURCE_MEM;
                res.start += switch_base;
                res.end += switch_base;

                target = ocelot_regmap_init(ocelot, &res);
                if (IS_ERR(target)) {
                        dev_err(ocelot->dev,
                                "Failed to map device memory space\n");
                        kfree(port_phy_modes);
                        return PTR_ERR(target);
                }

                ocelot->targets[i] = target;
        }

        err = ocelot_regfields_init(ocelot, felix->info->regfields);
        if (err) {
                dev_err(ocelot->dev, "failed to init reg fields map\n");
                kfree(port_phy_modes);
                return err;
        }

        for (port = 0; port < num_phys_ports; port++) {
                struct ocelot_port *ocelot_port;
                void __iomem *port_regs;

                ocelot_port = devm_kzalloc(ocelot->dev,
                                           sizeof(struct ocelot_port),
                                           GFP_KERNEL);
                if (!ocelot_port) {
                        dev_err(ocelot->dev,
                                "failed to allocate port memory\n");
                        kfree(port_phy_modes);
                        return -ENOMEM;
                }

                memcpy(&res, &felix->info->port_io_res[port], sizeof(res));
                res.flags = IORESOURCE_MEM;
                res.start += switch_base;
                res.end += switch_base;

                port_regs = devm_ioremap_resource(ocelot->dev, &res);
                if (IS_ERR(port_regs)) {
                        dev_err(ocelot->dev,
                                "failed to map registers for port %d\n", port);
                        kfree(port_phy_modes);
                        return PTR_ERR(port_regs);
                }

                ocelot_port->phy_mode = port_phy_modes[port];
                ocelot_port->ocelot = ocelot;
                ocelot_port->regs = port_regs;
                ocelot->ports[port] = ocelot_port;
        }

        kfree(port_phy_modes);

        if (felix->info->mdio_bus_alloc) {
                err = felix->info->mdio_bus_alloc(ocelot);
                if (err < 0)
                        return err;
        }

        return 0;
}

/* Hardware initialization done here so that we can allocate structures with
 * devm without fear of dsa_register_switch returning -EPROBE_DEFER and causing
 * us to allocate structures twice (leak memory) and map PCI memory twice
 * (which will not work).
 */
static int felix_setup(struct dsa_switch *ds)
{
        struct ocelot *ocelot = ds->priv;
        struct felix *felix = ocelot_to_felix(ocelot);
        int port, err;

        err = felix_init_structs(felix, ds->num_ports);
        if (err)
                return err;

        ocelot_init(ocelot);

        for (port = 0; port < ds->num_ports; port++) {
                ocelot_init_port(ocelot, port);

                /* Bring up the CPU port module and configure the NPI port */
                if (dsa_is_cpu_port(ds, port))
                        ocelot_configure_cpu(ocelot, port,
                                             OCELOT_TAG_PREFIX_NONE,
                                             OCELOT_TAG_PREFIX_LONG);
        }

        /* Include the CPU port module in the forwarding mask for unknown
         * unicast - the hardware default value for ANA_FLOODING_FLD_UNICAST
         * excludes BIT(ocelot->num_phys_ports), and so does ocelot_init, since
         * Ocelot relies on whitelisting MAC addresses towards PGID_CPU.
         */
        ocelot_write_rix(ocelot,
                         ANA_PGID_PGID_PGID(GENMASK(ocelot->num_phys_ports, 0)),
                         ANA_PGID_PGID, PGID_UC);

        ds->mtu_enforcement_ingress = true;
        /* It looks like the MAC/PCS interrupt register - PM0_IEVENT (0x8040)
         * isn't instantiated for the Felix PF.
         * In-band AN may take a few ms to complete, so we need to poll.
         */
        ds->pcs_poll = true;

        return 0;
}

static void felix_teardown(struct dsa_switch *ds)
{
        struct ocelot *ocelot = ds->priv;
        struct felix *felix = ocelot_to_felix(ocelot);

        if (felix->info->mdio_bus_free)
                felix->info->mdio_bus_free(ocelot);

        /* stop workqueue thread */
        ocelot_deinit(ocelot);
}

static int felix_hwtstamp_get(struct dsa_switch *ds, int port,
                              struct ifreq *ifr)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_hwstamp_get(ocelot, port, ifr);
}

static int felix_hwtstamp_set(struct dsa_switch *ds, int port,
                              struct ifreq *ifr)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_hwstamp_set(ocelot, port, ifr);
}

static bool felix_rxtstamp(struct dsa_switch *ds, int port,
                           struct sk_buff *skb, unsigned int type)
{
        struct skb_shared_hwtstamps *shhwtstamps;
        struct ocelot *ocelot = ds->priv;
        u8 *extraction = skb->data - ETH_HLEN - OCELOT_TAG_LEN;
        u32 tstamp_lo, tstamp_hi;
        struct timespec64 ts;
        u64 tstamp, val;

        ocelot_ptp_gettime64(&ocelot->ptp_info, &ts);
        tstamp = ktime_set(ts.tv_sec, ts.tv_nsec);

        packing(extraction, &val,  116, 85, OCELOT_TAG_LEN, UNPACK, 0);
        tstamp_lo = (u32)val;

        tstamp_hi = tstamp >> 32;
        if ((tstamp & 0xffffffff) < tstamp_lo)
                tstamp_hi--;

        tstamp = ((u64)tstamp_hi << 32) | tstamp_lo;

        shhwtstamps = skb_hwtstamps(skb);
        memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
        shhwtstamps->hwtstamp = tstamp;
        return false;
}

static bool felix_txtstamp(struct dsa_switch *ds, int port,
                           struct sk_buff *clone, unsigned int type)
{
        struct ocelot *ocelot = ds->priv;
        struct ocelot_port *ocelot_port = ocelot->ports[port];

        if (!ocelot_port_add_txtstamp_skb(ocelot_port, clone))
                return true;

        return false;
}

static int felix_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_port_set_maxlen(ocelot, port, new_mtu);

        return 0;
}

static int felix_get_max_mtu(struct dsa_switch *ds, int port)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_get_max_mtu(ocelot, port);
}

static int felix_cls_flower_add(struct dsa_switch *ds, int port,
                                struct flow_cls_offload *cls, bool ingress)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_cls_flower_replace(ocelot, port, cls, ingress);
}

static int felix_cls_flower_del(struct dsa_switch *ds, int port,
                                struct flow_cls_offload *cls, bool ingress)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_cls_flower_destroy(ocelot, port, cls, ingress);
}

static int felix_cls_flower_stats(struct dsa_switch *ds, int port,
                                  struct flow_cls_offload *cls, bool ingress)
{
        struct ocelot *ocelot = ds->priv;

        return ocelot_cls_flower_stats(ocelot, port, cls, ingress);
}

static int felix_port_policer_add(struct dsa_switch *ds, int port,
                                  struct dsa_mall_policer_tc_entry *policer)
{
        struct ocelot *ocelot = ds->priv;
        struct ocelot_policer pol = {
                .rate = div_u64(policer->rate_bytes_per_sec, 1000) * 8,
                .burst = div_u64(policer->rate_bytes_per_sec *
                                 PSCHED_NS2TICKS(policer->burst),
                                 PSCHED_TICKS_PER_SEC),
        };

        return ocelot_port_policer_add(ocelot, port, &pol);
}

static void felix_port_policer_del(struct dsa_switch *ds, int port)
{
        struct ocelot *ocelot = ds->priv;

        ocelot_port_policer_del(ocelot, port);
}

static const struct dsa_switch_ops felix_switch_ops = {
        .get_tag_protocol       = felix_get_tag_protocol,
        .setup                  = felix_setup,
        .teardown               = felix_teardown,
        .set_ageing_time        = felix_set_ageing_time,
        .get_strings            = felix_get_strings,
        .get_ethtool_stats      = felix_get_ethtool_stats,
        .get_sset_count         = felix_get_sset_count,
        .get_ts_info            = felix_get_ts_info,
        .phylink_validate       = felix_phylink_validate,
        .phylink_mac_link_state = felix_phylink_mac_pcs_get_state,
        .phylink_mac_config     = felix_phylink_mac_config,
        .phylink_mac_an_restart = felix_phylink_mac_an_restart,
        .phylink_mac_link_down  = felix_phylink_mac_link_down,
        .phylink_mac_link_up    = felix_phylink_mac_link_up,
        .port_enable            = felix_port_enable,
        .port_disable           = felix_port_disable,
        .port_fdb_dump          = felix_fdb_dump,
        .port_fdb_add           = felix_fdb_add,
        .port_fdb_del           = felix_fdb_del,
        .port_bridge_join       = felix_bridge_join,
        .port_bridge_leave      = felix_bridge_leave,
        .port_stp_state_set     = felix_bridge_stp_state_set,
        .port_vlan_prepare      = felix_vlan_prepare,
        .port_vlan_filtering    = felix_vlan_filtering,
        .port_vlan_add          = felix_vlan_add,
        .port_vlan_del          = felix_vlan_del,
        .port_hwtstamp_get      = felix_hwtstamp_get,
        .port_hwtstamp_set      = felix_hwtstamp_set,
        .port_rxtstamp          = felix_rxtstamp,
        .port_txtstamp          = felix_txtstamp,
        .port_change_mtu        = felix_change_mtu,
        .port_max_mtu           = felix_get_max_mtu,
        .port_policer_add       = felix_port_policer_add,
        .port_policer_del       = felix_port_policer_del,
        .cls_flower_add         = felix_cls_flower_add,
        .cls_flower_del         = felix_cls_flower_del,
        .cls_flower_stats       = felix_cls_flower_stats,
};

static struct felix_info *felix_instance_tbl[] = {
        [FELIX_INSTANCE_VSC9959] = &felix_info_vsc9959,
};

static irqreturn_t felix_irq_handler(int irq, void *data)
{
        struct ocelot *ocelot = (struct ocelot *)data;

        /* The INTB interrupt is used for both PTP TX timestamp interrupt
         * and preemption status change interrupt on each port.
         *
         * - Get txtstamp if have
         * - TODO: handle preemption. Without handling it, driver may get
         *   interrupt storm.
         */

        ocelot_get_txtstamp(ocelot);

        return IRQ_HANDLED;
}

static int felix_pci_probe(struct pci_dev *pdev,
                           const struct pci_device_id *id)
{
        enum felix_instance instance = id->driver_data;
        struct dsa_switch *ds;
        struct ocelot *ocelot;
        struct felix *felix;
        int err;

        err = pci_enable_device(pdev);
        if (err) {
                dev_err(&pdev->dev, "device enable failed\n");
                goto err_pci_enable;
        }

        /* set up for high or low dma */
        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err) {
                err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
                if (err) {
                        dev_err(&pdev->dev,
                                "DMA configuration failed: 0x%x\n", err);
                        goto err_dma;
                }
        }

        felix = kzalloc(sizeof(struct felix), GFP_KERNEL);
        if (!felix) {
                err = -ENOMEM;
                dev_err(&pdev->dev, "Failed to allocate driver memory\n");
                goto err_alloc_felix;
        }

        pci_set_drvdata(pdev, felix);
        ocelot = &felix->ocelot;
        ocelot->dev = &pdev->dev;
        felix->pdev = pdev;
        felix->info = felix_instance_tbl[instance];

        pci_set_master(pdev);

        err = devm_request_threaded_irq(&pdev->dev, pdev->irq, NULL,
                                        &felix_irq_handler, IRQF_ONESHOT,
                                        "felix-intb", ocelot);
        if (err) {
                dev_err(&pdev->dev, "Failed to request irq\n");
                goto err_alloc_irq;
        }

        ocelot->ptp = 1;

        ds = kzalloc(sizeof(struct dsa_switch), GFP_KERNEL);
        if (!ds) {
                err = -ENOMEM;
                dev_err(&pdev->dev, "Failed to allocate DSA switch\n");
                goto err_alloc_ds;
        }

        ds->dev = &pdev->dev;
        ds->num_ports = felix->info->num_ports;
        ds->ops = &felix_switch_ops;
        ds->priv = ocelot;
        felix->ds = ds;

        err = dsa_register_switch(ds);
        if (err) {
                dev_err(&pdev->dev, "Failed to register DSA switch: %d\n", err);
                goto err_register_ds;
        }

        return 0;

err_register_ds:
        kfree(ds);
err_alloc_ds:
err_alloc_irq:
err_alloc_felix:
        kfree(felix);
err_dma:
        pci_disable_device(pdev);
err_pci_enable:
        return err;
}

static void felix_pci_remove(struct pci_dev *pdev)
{
        struct felix *felix;

        felix = pci_get_drvdata(pdev);

        dsa_unregister_switch(felix->ds);

        kfree(felix->ds);
        kfree(felix);

        pci_disable_device(pdev);
}

static struct pci_device_id felix_ids[] = {
        {
                /* NXP LS1028A */
                PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0xEEF0),
                .driver_data = FELIX_INSTANCE_VSC9959,
        },
        { 0, }
};
MODULE_DEVICE_TABLE(pci, felix_ids);

static struct pci_driver felix_pci_driver = {
        .name           = KBUILD_MODNAME,
        .id_table       = felix_ids,
        .probe          = felix_pci_probe,
        .remove         = felix_pci_remove,
};

module_pci_driver(felix_pci_driver);

MODULE_DESCRIPTION("Felix Switch driver");
MODULE_LICENSE("GPL v2");