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linux/include/net/cfg802154.h
Jakub Kicinski c304eddcec net: wrap the wireless pointers in struct net_device in an ifdef 
Most protocol-specific pointers in struct net_device are under
a respective ifdef. Wireless is the notable exception. Since
there's a sizable number of custom-built kernels for datacenter
workloads which don't build wireless it seems reasonable to
ifdefy those pointers as well.

While at it move IPv4 and IPv6 pointers up, those are special
for obvious reasons.

Acked-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> # ieee802154
Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-22 21:51:54 +01:00

423 lines
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2007, 2008, 2009 Siemens AG
*
* Written by:
* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
*/
#ifndef __NET_CFG802154_H
#define __NET_CFG802154_H
#include <linux/ieee802154.h>
#include <linux/netdevice.h>
#include <linux/mutex.h>
#include <linux/bug.h>
#include <net/nl802154.h>
struct wpan_phy;
struct wpan_phy_cca;
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
struct ieee802154_llsec_device_key;
struct ieee802154_llsec_seclevel;
struct ieee802154_llsec_params;
struct ieee802154_llsec_device;
struct ieee802154_llsec_table;
struct ieee802154_llsec_key_id;
struct ieee802154_llsec_key;
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
struct cfg802154_ops {
struct net_device * (*add_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
const char *name,
unsigned char name_assign_type,
int type);
void (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
struct net_device *dev);
int (*suspend)(struct wpan_phy *wpan_phy);
int (*resume)(struct wpan_phy *wpan_phy);
int (*add_virtual_intf)(struct wpan_phy *wpan_phy,
const char *name,
unsigned char name_assign_type,
enum nl802154_iftype type,
__le64 extended_addr);
int (*del_virtual_intf)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev);
int (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
int (*set_cca_mode)(struct wpan_phy *wpan_phy,
const struct wpan_phy_cca *cca);
int (*set_cca_ed_level)(struct wpan_phy *wpan_phy, s32 ed_level);
int (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power);
int (*set_pan_id)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, __le16 pan_id);
int (*set_short_addr)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, __le16 short_addr);
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);
int (*set_max_frame_retries)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
s8 max_frame_retries);
int (*set_lbt_mode)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, bool mode);
int (*set_ackreq_default)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, bool ackreq);
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
void (*get_llsec_table)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_llsec_table **table);
void (*lock_llsec_table)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev);
void (*unlock_llsec_table)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev);
/* TODO remove locking/get table callbacks, this is part of the
* nl802154 interface and should be accessible from ieee802154 layer.
*/
int (*get_llsec_params)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_llsec_params *params);
int (*set_llsec_params)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_params *params,
int changed);
int (*add_llsec_key)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_key_id *id,
const struct ieee802154_llsec_key *key);
int (*del_llsec_key)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_key_id *id);
int (*add_seclevel)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_seclevel *sl);
int (*del_seclevel)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_seclevel *sl);
int (*add_device)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_device *dev);
int (*del_device)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, __le64 extended_addr);
int (*add_devkey)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
__le64 extended_addr,
const struct ieee802154_llsec_device_key *key);
int (*del_devkey)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
__le64 extended_addr,
const struct ieee802154_llsec_device_key *key);
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
static inline bool
wpan_phy_supported_bool(bool b, enum nl802154_supported_bool_states st)
{
switch (st) {
case NL802154_SUPPORTED_BOOL_TRUE:
return b;
case NL802154_SUPPORTED_BOOL_FALSE:
return !b;
case NL802154_SUPPORTED_BOOL_BOTH:
return true;
default:
WARN_ON(1);
}
return false;
}
struct wpan_phy_supported {
u32 channels[IEEE802154_MAX_PAGE + 1],
cca_modes, cca_opts, iftypes;
enum nl802154_supported_bool_states lbt;
u8 min_minbe, max_minbe, min_maxbe, max_maxbe,
min_csma_backoffs, max_csma_backoffs;
s8 min_frame_retries, max_frame_retries;
size_t tx_powers_size, cca_ed_levels_size;
const s32 *tx_powers, *cca_ed_levels;
};
struct wpan_phy_cca {
enum nl802154_cca_modes mode;
enum nl802154_cca_opts opt;
};
static inline bool
wpan_phy_cca_cmp(const struct wpan_phy_cca *a, const struct wpan_phy_cca *b)
{
if (a->mode != b->mode)
return false;
if (a->mode == NL802154_CCA_ENERGY_CARRIER)
return a->opt == b->opt;
return true;
}
/**
* @WPAN_PHY_FLAG_TRANSMIT_POWER: Indicates that transceiver will support
* transmit power setting.
* @WPAN_PHY_FLAG_CCA_ED_LEVEL: Indicates that transceiver will support cca ed
* level setting.
* @WPAN_PHY_FLAG_CCA_MODE: Indicates that transceiver will support cca mode
* setting.
*/
enum wpan_phy_flags {
WPAN_PHY_FLAG_TXPOWER = BIT(1),
WPAN_PHY_FLAG_CCA_ED_LEVEL = BIT(2),
WPAN_PHY_FLAG_CCA_MODE = BIT(3),
};
struct wpan_phy {
/* If multiple wpan_phys are registered and you're handed e.g.
* a regular netdev with assigned ieee802154_ptr, you won't
* know whether it points to a wpan_phy your driver has registered
* or not. Assign this to something global to your driver to
* help determine whether you own this wpan_phy or not.
*/
const void *privid;
u32 flags;
/*
* This is a PIB according to 802.15.4-2011.
* We do not provide timing-related variables, as they
* aren't used outside of driver
*/
u8 current_channel;
u8 current_page;
struct wpan_phy_supported supported;
/* current transmit_power in mBm */
s32 transmit_power;
struct wpan_phy_cca cca;
__le64 perm_extended_addr;
/* current cca ed threshold in mBm */
s32 cca_ed_level;
/* PHY depended MAC PIB values */
/* 802.15.4 acronym: Tdsym in nsec */
u32 symbol_duration;
/* lifs and sifs periods timing */
u16 lifs_period;
u16 sifs_period;
struct device dev;
/* the network namespace this phy lives in currently */
possible_net_t _net;
char priv[] __aligned(NETDEV_ALIGN);
};
static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy)
{
return read_pnet(&wpan_phy->_net);
}
static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net)
{
write_pnet(&wpan_phy->_net, net);
}
/**
* struct ieee802154_addr - IEEE802.15.4 device address
* @mode: Address mode from frame header. Can be one of:
* - @IEEE802154_ADDR_NONE
* - @IEEE802154_ADDR_SHORT
* - @IEEE802154_ADDR_LONG
* @pan_id: The PAN ID this address belongs to
* @short_addr: address if @mode is @IEEE802154_ADDR_SHORT
* @extended_addr: address if @mode is @IEEE802154_ADDR_LONG
*/
struct ieee802154_addr {
u8 mode;
__le16 pan_id;
union {
__le16 short_addr;
__le64 extended_addr;
};
};
struct ieee802154_llsec_key_id {
u8 mode;
u8 id;
union {
struct ieee802154_addr device_addr;
__le32 short_source;
__le64 extended_source;
};
};
#define IEEE802154_LLSEC_KEY_SIZE 16
struct ieee802154_llsec_key {
u8 frame_types;
u32 cmd_frame_ids;
/* TODO replace with NL802154_KEY_SIZE */
u8 key[IEEE802154_LLSEC_KEY_SIZE];
};
struct ieee802154_llsec_key_entry {
struct list_head list;
struct ieee802154_llsec_key_id id;
struct ieee802154_llsec_key *key;
};
struct ieee802154_llsec_params {
bool enabled;
__be32 frame_counter;
u8 out_level;
struct ieee802154_llsec_key_id out_key;
__le64 default_key_source;
__le16 pan_id;
__le64 hwaddr;
__le64 coord_hwaddr;
__le16 coord_shortaddr;
};
struct ieee802154_llsec_table {
struct list_head keys;
struct list_head devices;
struct list_head security_levels;
};
struct ieee802154_llsec_seclevel {
struct list_head list;
u8 frame_type;
u8 cmd_frame_id;
bool device_override;
u32 sec_levels;
};
struct ieee802154_llsec_device {
struct list_head list;
__le16 pan_id;
__le16 short_addr;
__le64 hwaddr;
u32 frame_counter;
bool seclevel_exempt;
u8 key_mode;
struct list_head keys;
};
struct ieee802154_llsec_device_key {
struct list_head list;
struct ieee802154_llsec_key_id key_id;
u32 frame_counter;
};
struct wpan_dev_header_ops {
/* TODO create callback currently assumes ieee802154_mac_cb inside
* skb->cb. This should be changed to give these information as
* parameter.
*/
int (*create)(struct sk_buff *skb, struct net_device *dev,
const struct ieee802154_addr *daddr,
const struct ieee802154_addr *saddr,
unsigned int len);
};
struct wpan_dev {
struct wpan_phy *wpan_phy;
int iftype;
/* the remainder of this struct should be private to cfg802154 */
struct list_head list;
struct net_device *netdev;
const struct wpan_dev_header_ops *header_ops;
/* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
struct net_device *lowpan_dev;
u32 identifier;
/* MAC PIB */
__le16 pan_id;
__le16 short_addr;
__le64 extended_addr;
/* MAC BSN field */
atomic_t bsn;
/* MAC DSN field */
atomic_t dsn;
u8 min_be;
u8 max_be;
u8 csma_retries;
s8 frame_retries;
bool lbt;
bool promiscuous_mode;
/* fallback for acknowledgment bit setting */
bool ackreq;
};
#define to_phy(_dev) container_of(_dev, struct wpan_phy, dev)
#if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN)
static inline int
wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
const struct ieee802154_addr *daddr,
const struct ieee802154_addr *saddr,
unsigned int len)
{
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len);
}
#endif
struct wpan_phy *
wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
{
phy->dev.parent = dev;
}
int wpan_phy_register(struct wpan_phy *phy);
void wpan_phy_unregister(struct wpan_phy *phy);
void wpan_phy_free(struct wpan_phy *phy);
/* Same semantics as for class_for_each_device */
int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
static inline void *wpan_phy_priv(struct wpan_phy *phy)
{
BUG_ON(!phy);
return &phy->priv;
}
struct wpan_phy *wpan_phy_find(const char *str);
static inline void wpan_phy_put(struct wpan_phy *phy)
{
put_device(&phy->dev);
}
static inline const char *wpan_phy_name(struct wpan_phy *phy)
{
return dev_name(&phy->dev);
}
void ieee802154_configure_durations(struct wpan_phy *phy);
#endif /* __NET_CFG802154_H */
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