#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/hardirq.h>
#include <linux/netdevice.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <linux/kthread.h>
#include <linux/kfifo.h>
#include <net/cfg80211.h>

#include "mesh.h"
#include "decl.h"
#include "cmd.h"


static int lbs_add_mesh(struct lbs_private *priv);

/***************************************************************************
 * Mesh command handling
 */

static int lbs_mesh_access(struct lbs_private *priv, uint16_t cmd_action,
                    struct cmd_ds_mesh_access *cmd)
{
        int ret;

        lbs_deb_enter_args(LBS_DEB_CMD, "action %d", cmd_action);

        cmd->hdr.command = cpu_to_le16(CMD_MESH_ACCESS);
        cmd->hdr.size = cpu_to_le16(sizeof(*cmd));
        cmd->hdr.result = 0;

        cmd->action = cpu_to_le16(cmd_action);

        ret = lbs_cmd_with_response(priv, CMD_MESH_ACCESS, cmd);

        lbs_deb_leave(LBS_DEB_CMD);
        return ret;
}

static int __lbs_mesh_config_send(struct lbs_private *priv,
                                  struct cmd_ds_mesh_config *cmd,
                                  uint16_t action, uint16_t type)
{
        int ret;
        u16 command = CMD_MESH_CONFIG_OLD;

        lbs_deb_enter(LBS_DEB_CMD);

        /*
         * Command id is 0xac for v10 FW along with mesh interface
         * id in bits 14-13-12.
         */
        if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
                command = CMD_MESH_CONFIG |
                          (MESH_IFACE_ID << MESH_IFACE_BIT_OFFSET);

        cmd->hdr.command = cpu_to_le16(command);
        cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_mesh_config));
        cmd->hdr.result = 0;

        cmd->type = cpu_to_le16(type);
        cmd->action = cpu_to_le16(action);

        ret = lbs_cmd_with_response(priv, command, cmd);

        lbs_deb_leave(LBS_DEB_CMD);
        return ret;
}

static int lbs_mesh_config_send(struct lbs_private *priv,
                         struct cmd_ds_mesh_config *cmd,
                         uint16_t action, uint16_t type)
{
        int ret;

        if (!(priv->fwcapinfo & FW_CAPINFO_PERSISTENT_CONFIG))
                return -EOPNOTSUPP;

        ret = __lbs_mesh_config_send(priv, cmd, action, type);
        return ret;
}

/* This function is the CMD_MESH_CONFIG legacy function.  It only handles the
 * START and STOP actions.  The extended actions supported by CMD_MESH_CONFIG
 * are all handled by preparing a struct cmd_ds_mesh_config and passing it to
 * lbs_mesh_config_send.
 */
static int lbs_mesh_config(struct lbs_private *priv, uint16_t action,
                uint16_t chan)
{
        struct cmd_ds_mesh_config cmd;
        struct mrvl_meshie *ie;

        memset(&cmd, 0, sizeof(cmd));
        cmd.channel = cpu_to_le16(chan);
        ie = (struct mrvl_meshie *)cmd.data;

        switch (action) {
        case CMD_ACT_MESH_CONFIG_START:
                ie->id = WLAN_EID_VENDOR_SPECIFIC;
                ie->val.oui[0] = 0x00;
                ie->val.oui[1] = 0x50;
                ie->val.oui[2] = 0x43;
                ie->val.type = MARVELL_MESH_IE_TYPE;
                ie->val.subtype = MARVELL_MESH_IE_SUBTYPE;
                ie->val.version = MARVELL_MESH_IE_VERSION;
                ie->val.active_protocol_id = MARVELL_MESH_PROTO_ID_HWMP;
                ie->val.active_metric_id = MARVELL_MESH_METRIC_ID;
                ie->val.mesh_capability = MARVELL_MESH_CAPABILITY;
                ie->val.mesh_id_len = priv->mesh_ssid_len;
                memcpy(ie->val.mesh_id, priv->mesh_ssid, priv->mesh_ssid_len);
                ie->len = sizeof(struct mrvl_meshie_val) -
                        IEEE80211_MAX_SSID_LEN + priv->mesh_ssid_len;
                cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie_val));
                break;
        case CMD_ACT_MESH_CONFIG_STOP:
                break;
        default:
                return -1;
        }
        lbs_deb_cmd("mesh config action %d type %x channel %d SSID %*pE\n",
                    action, priv->mesh_tlv, chan, priv->mesh_ssid_len,
                    priv->mesh_ssid);

        return __lbs_mesh_config_send(priv, &cmd, action, priv->mesh_tlv);
}

int lbs_mesh_set_channel(struct lbs_private *priv, u8 channel)
{
        priv->mesh_channel = channel;
        return lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, channel);
}

static uint16_t lbs_mesh_get_channel(struct lbs_private *priv)
{
        return priv->mesh_channel ?: 1;
}

/***************************************************************************
 * Mesh sysfs support
 */

/*
 * Attributes exported through sysfs
 */

/**
 * lbs_anycast_get - Get function for sysfs attribute anycast_mask
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t lbs_anycast_get(struct device *dev,
                struct device_attribute *attr, char * buf)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_access mesh_access;
        int ret;

        memset(&mesh_access, 0, sizeof(mesh_access));

        ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access);
        if (ret)
                return ret;

        return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
}

/**
 * lbs_anycast_set - Set function for sysfs attribute anycast_mask
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t lbs_anycast_set(struct device *dev,
                struct device_attribute *attr, const char * buf, size_t count)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_access mesh_access;
        uint32_t datum;
        int ret;

        memset(&mesh_access, 0, sizeof(mesh_access));
        sscanf(buf, "%x", &datum);
        mesh_access.data[0] = cpu_to_le32(datum);

        ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * lbs_prb_rsp_limit_get - Get function for sysfs attribute prb_rsp_limit
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t lbs_prb_rsp_limit_get(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_access mesh_access;
        int ret;
        u32 retry_limit;

        memset(&mesh_access, 0, sizeof(mesh_access));
        mesh_access.data[0] = cpu_to_le32(CMD_ACT_GET);

        ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
                        &mesh_access);
        if (ret)
                return ret;

        retry_limit = le32_to_cpu(mesh_access.data[1]);
        return snprintf(buf, 10, "%d\n", retry_limit);
}

/**
 * lbs_prb_rsp_limit_set - Set function for sysfs attribute prb_rsp_limit
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t lbs_prb_rsp_limit_set(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_access mesh_access;
        int ret;
        unsigned long retry_limit;

        memset(&mesh_access, 0, sizeof(mesh_access));
        mesh_access.data[0] = cpu_to_le32(CMD_ACT_SET);

        if (!kstrtoul(buf, 10, &retry_limit))
                return -ENOTSUPP;
        if (retry_limit > 15)
                return -ENOTSUPP;

        mesh_access.data[1] = cpu_to_le32(retry_limit);

        ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
                        &mesh_access);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * lbs_mesh_get - Get function for sysfs attribute mesh
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t lbs_mesh_get(struct device *dev,
                struct device_attribute *attr, char * buf)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        return snprintf(buf, 5, "0x%X\n", !!priv->mesh_dev);
}

/**
 * lbs_mesh_set - Set function for sysfs attribute mesh
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t lbs_mesh_set(struct device *dev,
                struct device_attribute *attr, const char * buf, size_t count)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        int enable;

        sscanf(buf, "%x", &enable);
        enable = !!enable;
        if (enable == !!priv->mesh_dev)
                return count;

        if (enable)
                lbs_add_mesh(priv);
        else
                lbs_remove_mesh(priv);

        return count;
}

/*
 * lbs_mesh attribute to be exported per ethX interface
 * through sysfs (/sys/class/net/ethX/lbs_mesh)
 */
static DEVICE_ATTR(lbs_mesh, 0644, lbs_mesh_get, lbs_mesh_set);

/*
 * anycast_mask attribute to be exported per mshX interface
 * through sysfs (/sys/class/net/mshX/anycast_mask)
 */
static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set);

/*
 * prb_rsp_limit attribute to be exported per mshX interface
 * through sysfs (/sys/class/net/mshX/prb_rsp_limit)
 */
static DEVICE_ATTR(prb_rsp_limit, 0644, lbs_prb_rsp_limit_get,
                lbs_prb_rsp_limit_set);

static struct attribute *lbs_mesh_sysfs_entries[] = {
        &dev_attr_anycast_mask.attr,
        &dev_attr_prb_rsp_limit.attr,
        NULL,
};

static const struct attribute_group lbs_mesh_attr_group = {
        .attrs = lbs_mesh_sysfs_entries,
};


/***************************************************************************
 * Persistent configuration support
 */

static int mesh_get_default_parameters(struct device *dev,
                                       struct mrvl_mesh_defaults *defs)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_config cmd;
        int ret;

        memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_GET,
                                   CMD_TYPE_MESH_GET_DEFAULTS);

        if (ret)
                return -EOPNOTSUPP;

        memcpy(defs, &cmd.data[0], sizeof(struct mrvl_mesh_defaults));

        return 0;
}

/**
 * bootflag_get - Get function for sysfs attribute bootflag
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t bootflag_get(struct device *dev,
                            struct device_attribute *attr, char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        return snprintf(buf, 12, "%d\n", le32_to_cpu(defs.bootflag));
}

/**
 * bootflag_set - Set function for sysfs attribute bootflag
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t bootflag_set(struct device *dev, struct device_attribute *attr,
                            const char *buf, size_t count)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_config cmd;
        uint32_t datum;
        int ret;

        memset(&cmd, 0, sizeof(cmd));
        ret = sscanf(buf, "%d", &datum);
        if ((ret != 1) || (datum > 1))
                return -EINVAL;

        *((__le32 *)&cmd.data[0]) = cpu_to_le32(!!datum);
        cmd.length = cpu_to_le16(sizeof(uint32_t));
        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_BOOTFLAG);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * boottime_get - Get function for sysfs attribute boottime
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t boottime_get(struct device *dev,
                            struct device_attribute *attr, char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        return snprintf(buf, 12, "%d\n", defs.boottime);
}

/**
 * boottime_set - Set function for sysfs attribute boottime
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t boottime_set(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_config cmd;
        uint32_t datum;
        int ret;

        memset(&cmd, 0, sizeof(cmd));
        ret = sscanf(buf, "%d", &datum);
        if ((ret != 1) || (datum > 255))
                return -EINVAL;

        /* A too small boot time will result in the device booting into
         * standalone (no-host) mode before the host can take control of it,
         * so the change will be hard to revert.  This may be a desired
         * feature (e.g to configure a very fast boot time for devices that
         * will not be attached to a host), but dangerous.  So I'm enforcing a
         * lower limit of 20 seconds:  remove and recompile the driver if this
         * does not work for you.
         */
        datum = (datum < 20) ? 20 : datum;
        cmd.data[0] = datum;
        cmd.length = cpu_to_le16(sizeof(uint8_t));
        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_BOOTTIME);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * channel_get - Get function for sysfs attribute channel
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t channel_get(struct device *dev,
                           struct device_attribute *attr, char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        return snprintf(buf, 12, "%d\n", le16_to_cpu(defs.channel));
}

/**
 * channel_set - Set function for sysfs attribute channel
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t channel_set(struct device *dev, struct device_attribute *attr,
                           const char *buf, size_t count)
{
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        struct cmd_ds_mesh_config cmd;
        uint32_t datum;
        int ret;

        memset(&cmd, 0, sizeof(cmd));
        ret = sscanf(buf, "%d", &datum);
        if (ret != 1 || datum < 1 || datum > 11)
                return -EINVAL;

        *((__le16 *)&cmd.data[0]) = cpu_to_le16(datum);
        cmd.length = cpu_to_le16(sizeof(uint16_t));
        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_DEF_CHANNEL);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * mesh_id_get - Get function for sysfs attribute mesh_id
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t mesh_id_get(struct device *dev, struct device_attribute *attr,
                           char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        if (defs.meshie.val.mesh_id_len > IEEE80211_MAX_SSID_LEN) {
                dev_err(dev, "inconsistent mesh ID length\n");
                defs.meshie.val.mesh_id_len = IEEE80211_MAX_SSID_LEN;
        }

        memcpy(buf, defs.meshie.val.mesh_id, defs.meshie.val.mesh_id_len);
        buf[defs.meshie.val.mesh_id_len] = '\n';
        buf[defs.meshie.val.mesh_id_len + 1] = '\0';

        return defs.meshie.val.mesh_id_len + 1;
}

/**
 * mesh_id_set - Set function for sysfs attribute mesh_id
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t mesh_id_set(struct device *dev, struct device_attribute *attr,
                           const char *buf, size_t count)
{
        struct cmd_ds_mesh_config cmd;
        struct mrvl_mesh_defaults defs;
        struct mrvl_meshie *ie;
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        int len;
        int ret;

        if (count < 2 || count > IEEE80211_MAX_SSID_LEN + 1)
                return -EINVAL;

        memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
        ie = (struct mrvl_meshie *) &cmd.data[0];

        /* fetch all other Information Element parameters */
        ret = mesh_get_default_parameters(dev, &defs);

        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));

        /* transfer IE elements */
        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));

        len = count - 1;
        memcpy(ie->val.mesh_id, buf, len);
        /* SSID len */
        ie->val.mesh_id_len = len;
        /* IE len */
        ie->len = sizeof(struct mrvl_meshie_val) - IEEE80211_MAX_SSID_LEN + len;

        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_MESH_IE);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * protocol_id_get - Get function for sysfs attribute protocol_id
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t protocol_id_get(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        return snprintf(buf, 5, "%d\n", defs.meshie.val.active_protocol_id);
}

/**
 * protocol_id_set - Set function for sysfs attribute protocol_id
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t protocol_id_set(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
{
        struct cmd_ds_mesh_config cmd;
        struct mrvl_mesh_defaults defs;
        struct mrvl_meshie *ie;
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        uint32_t datum;
        int ret;

        memset(&cmd, 0, sizeof(cmd));
        ret = sscanf(buf, "%d", &datum);
        if ((ret != 1) || (datum > 255))
                return -EINVAL;

        /* fetch all other Information Element parameters */
        ret = mesh_get_default_parameters(dev, &defs);

        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));

        /* transfer IE elements */
        ie = (struct mrvl_meshie *) &cmd.data[0];
        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
        /* update protocol id */
        ie->val.active_protocol_id = datum;

        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_MESH_IE);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * metric_id_get - Get function for sysfs attribute metric_id
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t metric_id_get(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        return snprintf(buf, 5, "%d\n", defs.meshie.val.active_metric_id);
}

/**
 * metric_id_set - Set function for sysfs attribute metric_id
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t metric_id_set(struct device *dev, struct device_attribute *attr,
                             const char *buf, size_t count)
{
        struct cmd_ds_mesh_config cmd;
        struct mrvl_mesh_defaults defs;
        struct mrvl_meshie *ie;
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        uint32_t datum;
        int ret;

        memset(&cmd, 0, sizeof(cmd));
        ret = sscanf(buf, "%d", &datum);
        if ((ret != 1) || (datum > 255))
                return -EINVAL;

        /* fetch all other Information Element parameters */
        ret = mesh_get_default_parameters(dev, &defs);

        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));

        /* transfer IE elements */
        ie = (struct mrvl_meshie *) &cmd.data[0];
        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
        /* update metric id */
        ie->val.active_metric_id = datum;

        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_MESH_IE);
        if (ret)
                return ret;

        return strlen(buf);
}

/**
 * capability_get - Get function for sysfs attribute capability
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer where data will be returned
 */
static ssize_t capability_get(struct device *dev,
                struct device_attribute *attr, char *buf)
{
        struct mrvl_mesh_defaults defs;
        int ret;

        ret = mesh_get_default_parameters(dev, &defs);

        if (ret)
                return ret;

        return snprintf(buf, 5, "%d\n", defs.meshie.val.mesh_capability);
}

/**
 * capability_set - Set function for sysfs attribute capability
 * @dev: the &struct device
 * @attr: device attributes
 * @buf: buffer that contains new attribute value
 * @count: size of buffer
 */
static ssize_t capability_set(struct device *dev, struct device_attribute *attr,
                              const char *buf, size_t count)
{
        struct cmd_ds_mesh_config cmd;
        struct mrvl_mesh_defaults defs;
        struct mrvl_meshie *ie;
        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
        uint32_t datum;
        int ret;

        memset(&cmd, 0, sizeof(cmd));
        ret = sscanf(buf, "%d", &datum);
        if ((ret != 1) || (datum > 255))
                return -EINVAL;

        /* fetch all other Information Element parameters */
        ret = mesh_get_default_parameters(dev, &defs);

        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));

        /* transfer IE elements */
        ie = (struct mrvl_meshie *) &cmd.data[0];
        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
        /* update value */
        ie->val.mesh_capability = datum;

        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
                                   CMD_TYPE_MESH_SET_MESH_IE);
        if (ret)
                return ret;

        return strlen(buf);
}


static DEVICE_ATTR(bootflag, 0644, bootflag_get, bootflag_set);
static DEVICE_ATTR(boottime, 0644, boottime_get, boottime_set);
static DEVICE_ATTR(channel, 0644, channel_get, channel_set);
static DEVICE_ATTR(mesh_id, 0644, mesh_id_get, mesh_id_set);
static DEVICE_ATTR(protocol_id, 0644, protocol_id_get, protocol_id_set);
static DEVICE_ATTR(metric_id, 0644, metric_id_get, metric_id_set);
static DEVICE_ATTR(capability, 0644, capability_get, capability_set);

static struct attribute *boot_opts_attrs[] = {
        &dev_attr_bootflag.attr,
        &dev_attr_boottime.attr,
        &dev_attr_channel.attr,
        NULL
};

static const struct attribute_group boot_opts_group = {
        .name = "boot_options",
        .attrs = boot_opts_attrs,
};

static struct attribute *mesh_ie_attrs[] = {
        &dev_attr_mesh_id.attr,
        &dev_attr_protocol_id.attr,
        &dev_attr_metric_id.attr,
        &dev_attr_capability.attr,
        NULL
};

static const struct attribute_group mesh_ie_group = {
        .name = "mesh_ie",
        .attrs = mesh_ie_attrs,
};

static void lbs_persist_config_init(struct net_device *dev)
{
        int ret;
        ret = sysfs_create_group(&(dev->dev.kobj), &boot_opts_group);
        ret = sysfs_create_group(&(dev->dev.kobj), &mesh_ie_group);
}

static void lbs_persist_config_remove(struct net_device *dev)
{
        sysfs_remove_group(&(dev->dev.kobj), &boot_opts_group);
        sysfs_remove_group(&(dev->dev.kobj), &mesh_ie_group);
}


/***************************************************************************
 * Initializing and starting, stopping mesh
 */

/*
 * Check mesh FW version and appropriately send the mesh start
 * command
 */
int lbs_init_mesh(struct lbs_private *priv)
{
        int ret = 0;

        lbs_deb_enter(LBS_DEB_MESH);

        /* Determine mesh_fw_ver from fwrelease and fwcapinfo */
        /* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
        /* 5.110.22 have mesh command with 0xa3 command id */
        /* 10.0.0.p0 FW brings in mesh config command with different id */
        /* Check FW version MSB and initialize mesh_fw_ver */
        if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) {
                /* Enable mesh, if supported, and work out which TLV it uses.
                   0x100 + 291 is an unofficial value used in 5.110.20.pXX
                   0x100 + 37 is the official value used in 5.110.21.pXX
                   but we check them in that order because 20.pXX doesn't
                   give an error -- it just silently fails. */

                /* 5.110.20.pXX firmware will fail the command if the channel
                   doesn't match the existing channel. But only if the TLV
                   is correct. If the channel is wrong, _BOTH_ versions will
                   give an error to 0x100+291, and allow 0x100+37 to succeed.
                   It's just that 5.110.20.pXX will not have done anything
                   useful */

                priv->mesh_tlv = TLV_TYPE_OLD_MESH_ID;
                if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1)) {
                        priv->mesh_tlv = TLV_TYPE_MESH_ID;
                        if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
                                priv->mesh_tlv = 0;
                }
        } else
        if ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
                (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)) {
                /* 10.0.0.pXX new firmwares should succeed with TLV
                 * 0x100+37; Do not invoke command with old TLV.
                 */
                priv->mesh_tlv = TLV_TYPE_MESH_ID;
                if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
                        priv->mesh_tlv = 0;
        }

        /* Stop meshing until interface is brought up */
        lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, 1);

        if (priv->mesh_tlv) {
                sprintf(priv->mesh_ssid, "mesh");
                priv->mesh_ssid_len = 4;
                ret = 1;
        }

        lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
        return ret;
}

void lbs_start_mesh(struct lbs_private *priv)
{
        lbs_add_mesh(priv);

        if (device_create_file(&priv->dev->dev, &dev_attr_lbs_mesh))
                netdev_err(priv->dev, "cannot register lbs_mesh attribute\n");
}

int lbs_deinit_mesh(struct lbs_private *priv)
{
        struct net_device *dev = priv->dev;
        int ret = 0;

        lbs_deb_enter(LBS_DEB_MESH);

        if (priv->mesh_tlv) {
                device_remove_file(&dev->dev, &dev_attr_lbs_mesh);
                ret = 1;
        }

        lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
        return ret;
}


/**
 * lbs_mesh_stop - close the mshX interface
 *
 * @dev:        A pointer to &net_device structure
 * returns:     0
 */
static int lbs_mesh_stop(struct net_device *dev)
{
        struct lbs_private *priv = dev->ml_priv;

        lbs_deb_enter(LBS_DEB_MESH);
        lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
                lbs_mesh_get_channel(priv));

        spin_lock_irq(&priv->driver_lock);

        netif_stop_queue(dev);
        netif_carrier_off(dev);

        spin_unlock_irq(&priv->driver_lock);

        lbs_update_mcast(priv);
        if (!lbs_iface_active(priv))
                lbs_stop_iface(priv);

        lbs_deb_leave(LBS_DEB_MESH);
        return 0;
}

/**
 * lbs_mesh_dev_open - open the mshX interface
 *
 * @dev:        A pointer to &net_device structure
 * returns:     0 or -EBUSY if monitor mode active
 */
static int lbs_mesh_dev_open(struct net_device *dev)
{
        struct lbs_private *priv = dev->ml_priv;
        int ret = 0;

        lbs_deb_enter(LBS_DEB_NET);
        if (!priv->iface_running) {
                ret = lbs_start_iface(priv);
                if (ret)
                        goto out;
        }

        spin_lock_irq(&priv->driver_lock);

        if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
                ret = -EBUSY;
                spin_unlock_irq(&priv->driver_lock);
                goto out;
        }

        netif_carrier_on(dev);

        if (!priv->tx_pending_len)
                netif_wake_queue(dev);

        spin_unlock_irq(&priv->driver_lock);

        ret = lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
                lbs_mesh_get_channel(priv));

out:
        lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
        return ret;
}

static const struct net_device_ops mesh_netdev_ops = {
        .ndo_open               = lbs_mesh_dev_open,
        .ndo_stop               = lbs_mesh_stop,
        .ndo_start_xmit         = lbs_hard_start_xmit,
        .ndo_set_mac_address    = lbs_set_mac_address,
        .ndo_set_rx_mode        = lbs_set_multicast_list,
};

/**
 * lbs_add_mesh - add mshX interface
 *
 * @priv:       A pointer to the &struct lbs_private structure
 * returns:     0 if successful, -X otherwise
 */
static int lbs_add_mesh(struct lbs_private *priv)
{
        struct net_device *mesh_dev = NULL;
        struct wireless_dev *mesh_wdev;
        int ret = 0;

        lbs_deb_enter(LBS_DEB_MESH);

        /* Allocate a virtual mesh device */
        mesh_wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
        if (!mesh_wdev) {
                lbs_deb_mesh("init mshX wireless device failed\n");
                ret = -ENOMEM;
                goto done;
        }

        mesh_dev = alloc_netdev(0, "msh%d", NET_NAME_UNKNOWN, ether_setup);
        if (!mesh_dev) {
                lbs_deb_mesh("init mshX device failed\n");
                ret = -ENOMEM;
                goto err_free_wdev;
        }

        mesh_wdev->iftype = NL80211_IFTYPE_MESH_POINT;
        mesh_wdev->wiphy = priv->wdev->wiphy;
        mesh_wdev->netdev = mesh_dev;

        mesh_dev->ml_priv = priv;
        mesh_dev->ieee80211_ptr = mesh_wdev;
        priv->mesh_dev = mesh_dev;

        mesh_dev->netdev_ops = &mesh_netdev_ops;
        mesh_dev->ethtool_ops = &lbs_ethtool_ops;
        eth_hw_addr_inherit(mesh_dev, priv->dev);

        SET_NETDEV_DEV(priv->mesh_dev, priv->dev->dev.parent);

        mesh_dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
        /* Register virtual mesh interface */
        ret = register_netdev(mesh_dev);
        if (ret) {
                pr_err("cannot register mshX virtual interface\n");
                goto err_free_netdev;
        }

        ret = sysfs_create_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
        if (ret)
                goto err_unregister;

        lbs_persist_config_init(mesh_dev);

        /* Everything successful */
        ret = 0;
        goto done;

err_unregister:
        unregister_netdev(mesh_dev);

err_free_netdev:
        free_netdev(mesh_dev);

err_free_wdev:
        kfree(mesh_wdev);

done:
        lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
        return ret;
}

void lbs_remove_mesh(struct lbs_private *priv)
{
        struct net_device *mesh_dev;

        mesh_dev = priv->mesh_dev;
        if (!mesh_dev)
                return;

        lbs_deb_enter(LBS_DEB_MESH);
        netif_stop_queue(mesh_dev);
        netif_carrier_off(mesh_dev);
        sysfs_remove_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
        lbs_persist_config_remove(mesh_dev);
        unregister_netdev(mesh_dev);
        priv->mesh_dev = NULL;
        kfree(mesh_dev->ieee80211_ptr);
        free_netdev(mesh_dev);
        lbs_deb_leave(LBS_DEB_MESH);
}


/***************************************************************************
 * Sending and receiving
 */
struct net_device *lbs_mesh_set_dev(struct lbs_private *priv,
        struct net_device *dev, struct rxpd *rxpd)
{
        if (priv->mesh_dev) {
                if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID) {
                        if (rxpd->rx_control & RxPD_MESH_FRAME)
                                dev = priv->mesh_dev;
                } else if (priv->mesh_tlv == TLV_TYPE_MESH_ID) {
                        if (rxpd->u.bss.bss_num == MESH_IFACE_ID)
                                dev = priv->mesh_dev;
                }
        }
        return dev;
}


void lbs_mesh_set_txpd(struct lbs_private *priv,
        struct net_device *dev, struct txpd *txpd)
{
        if (dev == priv->mesh_dev) {
                if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID)
                        txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
                else if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
                        txpd->u.bss.bss_num = MESH_IFACE_ID;
        }
}


/***************************************************************************
 * Ethtool related
 */

static const char * const mesh_stat_strings[] = {
                        "drop_duplicate_bcast",
                        "drop_ttl_zero",
                        "drop_no_fwd_route",
                        "drop_no_buffers",
                        "fwded_unicast_cnt",
                        "fwded_bcast_cnt",
                        "drop_blind_table",
                        "tx_failed_cnt"
};

void lbs_mesh_ethtool_get_stats(struct net_device *dev,
        struct ethtool_stats *stats, uint64_t *data)
{
        struct lbs_private *priv = dev->ml_priv;
        struct cmd_ds_mesh_access mesh_access;
        int ret;

        lbs_deb_enter(LBS_DEB_ETHTOOL);

        /* Get Mesh Statistics */
        ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_STATS, &mesh_access);

        if (ret) {
                memset(data, 0, MESH_STATS_NUM*(sizeof(uint64_t)));
                return;
        }

        priv->mstats.fwd_drop_rbt = le32_to_cpu(mesh_access.data[0]);
        priv->mstats.fwd_drop_ttl = le32_to_cpu(mesh_access.data[1]);
        priv->mstats.fwd_drop_noroute = le32_to_cpu(mesh_access.data[2]);
        priv->mstats.fwd_drop_nobuf = le32_to_cpu(mesh_access.data[3]);
        priv->mstats.fwd_unicast_cnt = le32_to_cpu(mesh_access.data[4]);
        priv->mstats.fwd_bcast_cnt = le32_to_cpu(mesh_access.data[5]);
        priv->mstats.drop_blind = le32_to_cpu(mesh_access.data[6]);
        priv->mstats.tx_failed_cnt = le32_to_cpu(mesh_access.data[7]);

        data[0] = priv->mstats.fwd_drop_rbt;
        data[1] = priv->mstats.fwd_drop_ttl;
        data[2] = priv->mstats.fwd_drop_noroute;
        data[3] = priv->mstats.fwd_drop_nobuf;
        data[4] = priv->mstats.fwd_unicast_cnt;
        data[5] = priv->mstats.fwd_bcast_cnt;
        data[6] = priv->mstats.drop_blind;
        data[7] = priv->mstats.tx_failed_cnt;

        lbs_deb_enter(LBS_DEB_ETHTOOL);
}

int lbs_mesh_ethtool_get_sset_count(struct net_device *dev, int sset)
{
        struct lbs_private *priv = dev->ml_priv;

        if (sset == ETH_SS_STATS && dev == priv->mesh_dev)
                return MESH_STATS_NUM;

        return -EOPNOTSUPP;
}

void lbs_mesh_ethtool_get_strings(struct net_device *dev,
        uint32_t stringset, uint8_t *s)
{
        int i;

        lbs_deb_enter(LBS_DEB_ETHTOOL);

        switch (stringset) {
        case ETH_SS_STATS:
                for (i = 0; i < MESH_STATS_NUM; i++) {
                        memcpy(s + i * ETH_GSTRING_LEN,
                                        mesh_stat_strings[i],
                                        ETH_GSTRING_LEN);
                }
                break;
        }
        lbs_deb_enter(LBS_DEB_ETHTOOL);
}