text: // SPDX-License-Identifier: GPL-2.0
  #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;
  
  	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);
  
  	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;
  
  	/*
  	 * 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);
  
  	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 wireless_dev *mesh_wdev;
  	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;
  
  		if (priv->mesh_dev) {
  			mesh_wdev = priv->mesh_dev->ieee80211_ptr;
  			ie->val.mesh_id_len = mesh_wdev->mesh_id_up_len;
  			memcpy(ie->val.mesh_id, mesh_wdev->ssid,
  						mesh_wdev->mesh_id_up_len);
  		}
  
  		ie->len = sizeof(struct mrvl_meshie_val) -
  			IEEE80211_MAX_SSID_LEN + ie->val.mesh_id_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, ie->val.mesh_id_len,
  		    ie->val.mesh_id);
  
  	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);
  
  	ret = kstrtoul(buf, 10, &retry_limit);
  	if (ret)
  		return ret;
  	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);
  	if (ret)
  		pr_err("failed to create boot_opts_group.\n");
  
  	ret = sysfs_create_group(&(dev->dev.kobj), &mesh_ie_group);
  	if (ret)
  		pr_err("failed to create mesh_ie_group.\n");
  }
  
  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;
  
  	/* 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);
  
  	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;
  
  	if (priv->mesh_tlv) {
  		device_remove_file(&dev->dev, &dev_attr_lbs_mesh);
  		ret = 1;
  	}
  
  	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_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);
  
  	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;
  
  	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:
  	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;
  
  	/* 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;
  
  	if (priv->mesh_tlv) {
  		sprintf(mesh_wdev->ssid, "mesh");
  		mesh_wdev->mesh_id_up_len = 4;
  	}
  
  	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:
  	return ret;
  }
  
  void lbs_remove_mesh(struct lbs_private *priv)
  {
  	struct net_device *mesh_dev;
  
  	mesh_dev = priv->mesh_dev;
  	if (!mesh_dev)
  		return;
  
  	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);
  }
  
  
  /***************************************************************************
   * 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 mesh_stat_strings[MESH_STATS_NUM][ETH_GSTRING_LEN] = {
  	"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;
  
  	/* 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;
  }
  
  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)
  {
  	switch (stringset) {
  	case ETH_SS_STATS:
  		memcpy(s, mesh_stat_strings, sizeof(mesh_stat_strings));
  		break;
  	}
  }
  