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Commit a01ba765 authored by Alexander Aring's avatar Alexander Aring Committed by Marcel Holtmann
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ieee820154: add max csma backoffs setting support 



This patch add support for max csma backoffs setting via nl802154
framework.

Signed-off-by: default avatarAlexander Aring <alex.aring@gmail.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a8d352d4

include/net/cfg802154.h

+3 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ struct cfg802154_ops { 
	int	(*set_backoff_exponent)(struct wpan_phy *wpan_phy,

					struct wpan_dev *wpan_dev, u8 min_be,

					u8 max_be);

	int	(*set_max_csma_backoffs)(struct wpan_phy *wpan_phy,

					 struct wpan_dev *wpan_dev,

					 u8 max_csma_backoffs);

};



struct wpan_phy {

net/ieee802154/nl802154.c

+33 −0
Original line number Diff line number Diff line
@@ -642,6 +642,31 @@ nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info) 
	return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);

}



static int

nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)

{

	struct cfg802154_registered_device *rdev = info->user_ptr[0];

	struct net_device *dev = info->user_ptr[1];

	struct wpan_dev *wpan_dev = dev->ieee802154_ptr;

	u8 max_csma_backoffs;



	/* conflict here while other running iface settings */

	if (netif_running(dev))

		return -EBUSY;



	if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])

		return -EINVAL;



	max_csma_backoffs = nla_get_u8(

			info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);



	/* check 802.15.4 constraints */

	if (max_csma_backoffs > 5)

		return -EINVAL;



	return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);

}



#define NL802154_FLAG_NEED_WPAN_PHY	0x01

#define NL802154_FLAG_NEED_NETDEV	0x02

#define NL802154_FLAG_NEED_RTNL		0x04
@@ -784,6 +809,14 @@ static const struct genl_ops nl802154_ops[] = { 
		.internal_flags = NL802154_FLAG_NEED_NETDEV |

				  NL802154_FLAG_NEED_RTNL,

	},

	{

		.cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,

		.doit = nl802154_set_max_csma_backoffs,

		.policy = nl802154_policy,

		.flags = GENL_ADMIN_PERM,

		.internal_flags = NL802154_FLAG_NEED_NETDEV |

				  NL802154_FLAG_NEED_RTNL,

	},

};



/* initialisation/exit functions */

net/ieee802154/rdev-ops.h

+9 −0
Original line number Diff line number Diff line
@@ -50,4 +50,13 @@ rdev_set_backoff_exponent(struct cfg802154_registered_device *rdev, 
					       min_be, max_be);

}



static inline int

rdev_set_max_csma_backoffs(struct cfg802154_registered_device *rdev,

			   struct wpan_dev *wpan_dev,

			   const u8 max_csma_backoffs)

{

	return rdev->ops->set_max_csma_backoffs(&rdev->wpan_phy, wpan_dev,

						max_csma_backoffs);

}



#endif /* __CFG802154_RDEV_OPS */

net/mac802154/cfg.c

+16 −0
Original line number Diff line number Diff line
@@ -125,6 +125,21 @@ ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev, 
	return 0;

}



static int ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,

					    struct wpan_dev *wpan_dev,

					    const u8 max_csma_backoffs)

{

	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);



	ASSERT_RTNL();



	if (!(local->hw.flags & IEEE802154_HW_CSMA_PARAMS))

		return -EOPNOTSUPP;



	wpan_dev->csma_retries = max_csma_backoffs;

	return 0;

}



const struct cfg802154_ops mac802154_config_ops = {

	.add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,

	.del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
@@ -132,4 +147,5 @@ const struct cfg802154_ops mac802154_config_ops = { 
	.set_pan_id = ieee802154_set_pan_id,

	.set_short_addr = ieee802154_set_short_addr,

	.set_backoff_exponent = ieee802154_set_backoff_exponent,

	.set_max_csma_backoffs = ieee802154_set_max_csma_backoffs,

};