4244db1b0b
Introduce new netlink attributes for SET_PHY_ATTRS: * CSMA minimal backoff exponent * CSMA maximal backoff exponent * CSMA retry limit * frame retransmission limit The CSMA attributes shall correspond to minBE, maxBE and maxCSMABackoffs of 802.15.4, respectively. The frame retransmission shall correspond to maxFrameRetries of 802.15.4, unless given as -1: then the old behaviour of the stack shall apply. For RF2xy, the old behaviour is to not do channel sensing at all and simply send *right now*, which is not intended behaviour for most applications and actually prohibited for some channel/page combinations. For all values except frame retransmission limit, the defaults of 802.15.4 apply. Frame retransmission limits are set to -1 to indicate backward-compatible behaviour. Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de> Signed-off-by: David S. Miller <davem@davemloft.net>
105 lines
3 KiB
C
105 lines
3 KiB
C
/*
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* Copyright (C) 2007, 2008, 2009 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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*/
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#ifndef WPAN_PHY_H
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#define WPAN_PHY_H
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#include <linux/netdevice.h>
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#include <linux/mutex.h>
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#include <linux/bug.h>
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/* According to the IEEE 802.15.4 stadard the upper most significant bits of
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* the 32-bit channel bitmaps shall be used as an integer value to specify 32
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* possible channel pages. The lower 27 bits of the channel bit map shall be
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* used as a bit mask to specify channel numbers within a channel page.
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*/
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#define WPAN_NUM_CHANNELS 27
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#define WPAN_NUM_PAGES 32
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struct wpan_phy {
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struct mutex pib_lock;
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/*
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* This is a PIB according to 802.15.4-2011.
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* We do not provide timing-related variables, as they
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* aren't used outside of driver
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*/
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u8 current_channel;
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u8 current_page;
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u32 channels_supported[32];
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s8 transmit_power;
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u8 cca_mode;
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u8 min_be;
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u8 max_be;
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u8 csma_retries;
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s8 frame_retries;
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bool lbt;
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s32 cca_ed_level;
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struct device dev;
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int idx;
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struct net_device *(*add_iface)(struct wpan_phy *phy,
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const char *name, int type);
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void (*del_iface)(struct wpan_phy *phy, struct net_device *dev);
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int (*set_txpower)(struct wpan_phy *phy, int db);
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int (*set_lbt)(struct wpan_phy *phy, bool on);
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int (*set_cca_mode)(struct wpan_phy *phy, u8 cca_mode);
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int (*set_cca_ed_level)(struct wpan_phy *phy, int level);
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int (*set_csma_params)(struct wpan_phy *phy, u8 min_be, u8 max_be,
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u8 retries);
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int (*set_frame_retries)(struct wpan_phy *phy, s8 retries);
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char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
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};
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#define to_phy(_dev) container_of(_dev, struct wpan_phy, dev)
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struct wpan_phy *wpan_phy_alloc(size_t priv_size);
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static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
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{
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phy->dev.parent = dev;
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}
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int wpan_phy_register(struct wpan_phy *phy);
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void wpan_phy_unregister(struct wpan_phy *phy);
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void wpan_phy_free(struct wpan_phy *phy);
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/* Same semantics as for class_for_each_device */
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int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
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static inline void *wpan_phy_priv(struct wpan_phy *phy)
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{
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BUG_ON(!phy);
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return &phy->priv;
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}
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struct wpan_phy *wpan_phy_find(const char *str);
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static inline void wpan_phy_put(struct wpan_phy *phy)
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{
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put_device(&phy->dev);
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}
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static inline const char *wpan_phy_name(struct wpan_phy *phy)
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{
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return dev_name(&phy->dev);
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}
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#endif
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