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linux/net/mac802154/cfg.c
Miquel Raynal 781830c800 net: mac802154: Set durations automatically 
As depicted in the IEEE 802.15.4 specification, modulation/bands are
tight to a number of page/channels so we can for most of them derive the
durations automatically.

The two locations that must call this new helper to set the variou
symbol durations are:
- when manually requesting a channel change though the netlink interface
- at PHY creation, once the device driver has set the default
  page/channel

If an information is missing, the symbol duration is not touched, a
debug message is eventually printed. This keeps the compatibility with
the unconverted drivers for which it was too complicated for me to find
their precise information. If they initially provided a symbol duration,
it would be kept. If they don't, the symbol duration value is left
untouched.

Once the symbol duration derived, the lifs and sifs durations are
updated as well.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20220201180629.93410-4-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
2022-02-10 15:41:58 +01:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Authors:
* Alexander Aring <aar@pengutronix.de>
*
* Based on: net/mac80211/cfg.c
*/
#include <net/rtnetlink.h>
#include <net/cfg802154.h>
#include "ieee802154_i.h"
#include "driver-ops.h"
#include "cfg.h"
static struct net_device *
ieee802154_add_iface_deprecated(struct wpan_phy *wpan_phy,
const char *name,
unsigned char name_assign_type, int type)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
struct net_device *dev;
rtnl_lock();
dev = ieee802154_if_add(local, name, name_assign_type, type,
cpu_to_le64(0x0000000000000000ULL));
rtnl_unlock();
return dev;
}
static void ieee802154_del_iface_deprecated(struct wpan_phy *wpan_phy,
struct net_device *dev)
{
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
ieee802154_if_remove(sdata);
}
#ifdef CONFIG_PM
static int ieee802154_suspend(struct wpan_phy *wpan_phy)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
if (!local->open_count)
goto suspend;
ieee802154_stop_queue(&local->hw);
synchronize_net();
/* stop hardware - this must stop RX */
ieee802154_stop_device(local);
suspend:
local->suspended = true;
return 0;
}
static int ieee802154_resume(struct wpan_phy *wpan_phy)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
/* nothing to do if HW shouldn't run */
if (!local->open_count)
goto wake_up;
/* restart hardware */
ret = drv_start(local);
if (ret)
return ret;
wake_up:
ieee802154_wake_queue(&local->hw);
local->suspended = false;
return 0;
}
#else
#define ieee802154_suspend NULL
#define ieee802154_resume NULL
#endif
static int
ieee802154_add_iface(struct wpan_phy *phy, const char *name,
unsigned char name_assign_type,
enum nl802154_iftype type, __le64 extended_addr)
{
struct ieee802154_local *local = wpan_phy_priv(phy);
struct net_device *err;
err = ieee802154_if_add(local, name, name_assign_type, type,
extended_addr);
return PTR_ERR_OR_ZERO(err);
}
static int
ieee802154_del_iface(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev)
{
ieee802154_if_remove(IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev));
return 0;
}
static int
ieee802154_set_channel(struct wpan_phy *wpan_phy, u8 page, u8 channel)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy->current_page == page &&
wpan_phy->current_channel == channel)
return 0;
ret = drv_set_channel(local, page, channel);
if (!ret) {
wpan_phy->current_page = page;
wpan_phy->current_channel = channel;
ieee802154_configure_durations(wpan_phy);
}
return ret;
}
static int
ieee802154_set_cca_mode(struct wpan_phy *wpan_phy,
const struct wpan_phy_cca *cca)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy_cca_cmp(&wpan_phy->cca, cca))
return 0;
ret = drv_set_cca_mode(local, cca);
if (!ret)
wpan_phy->cca = *cca;
return ret;
}
static int
ieee802154_set_cca_ed_level(struct wpan_phy *wpan_phy, s32 ed_level)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy->cca_ed_level == ed_level)
return 0;
ret = drv_set_cca_ed_level(local, ed_level);
if (!ret)
wpan_phy->cca_ed_level = ed_level;
return ret;
}
static int
ieee802154_set_tx_power(struct wpan_phy *wpan_phy, s32 power)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
ASSERT_RTNL();
if (wpan_phy->transmit_power == power)
return 0;
ret = drv_set_tx_power(local, power);
if (!ret)
wpan_phy->transmit_power = power;
return ret;
}
static int
ieee802154_set_pan_id(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le16 pan_id)
{
int ret;
ASSERT_RTNL();
if (wpan_dev->pan_id == pan_id)
return 0;
ret = mac802154_wpan_update_llsec(wpan_dev->netdev);
if (!ret)
wpan_dev->pan_id = pan_id;
return ret;
}
static int
ieee802154_set_backoff_exponent(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
u8 min_be, u8 max_be)
{
ASSERT_RTNL();
wpan_dev->min_be = min_be;
wpan_dev->max_be = max_be;
return 0;
}
static int
ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le16 short_addr)
{
ASSERT_RTNL();
wpan_dev->short_addr = short_addr;
return 0;
}
static int
ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
u8 max_csma_backoffs)
{
ASSERT_RTNL();
wpan_dev->csma_retries = max_csma_backoffs;
return 0;
}
static int
ieee802154_set_max_frame_retries(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
s8 max_frame_retries)
{
ASSERT_RTNL();
wpan_dev->frame_retries = max_frame_retries;
return 0;
}
static int
ieee802154_set_lbt_mode(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
bool mode)
{
ASSERT_RTNL();
wpan_dev->lbt = mode;
return 0;
}
static int
ieee802154_set_ackreq_default(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, bool ackreq)
{
ASSERT_RTNL();
wpan_dev->ackreq = ackreq;
return 0;
}
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static void
ieee802154_get_llsec_table(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_llsec_table **table)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
*table = &sdata->sec.table;
}
static void
ieee802154_lock_llsec_table(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
mutex_lock(&sdata->sec_mtx);
}
static void
ieee802154_unlock_llsec_table(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
mutex_unlock(&sdata->sec_mtx);
}
static int
ieee802154_set_llsec_params(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_params *params,
int changed)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_set_params(&sdata->sec, params, changed);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_get_llsec_params(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev,
struct ieee802154_llsec_params *params)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_get_params(&sdata->sec, params);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_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)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_key_add(&sdata->sec, id, key);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_llsec_key(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_key_id *id)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_key_del(&sdata->sec, id);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_seclevel(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_seclevel *sl)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_seclevel_add(&sdata->sec, sl);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_seclevel(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_seclevel *sl)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_seclevel_del(&sdata->sec, sl);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_device(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
const struct ieee802154_llsec_device *dev_desc)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_dev_add(&sdata->sec, dev_desc);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_device(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le64 extended_addr)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_dev_del(&sdata->sec, extended_addr);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_add_devkey(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le64 extended_addr,
const struct ieee802154_llsec_device_key *key)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_devkey_add(&sdata->sec, extended_addr, key);
mutex_unlock(&sdata->sec_mtx);
return res;
}
static int
ieee802154_del_devkey(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
__le64 extended_addr,
const struct ieee802154_llsec_device_key *key)
{
struct net_device *dev = wpan_dev->netdev;
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
int res;
mutex_lock(&sdata->sec_mtx);
res = mac802154_llsec_devkey_del(&sdata->sec, extended_addr, key);
mutex_unlock(&sdata->sec_mtx);
return res;
}
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
const struct cfg802154_ops mac802154_config_ops = {
.add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
.del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
.suspend = ieee802154_suspend,
.resume = ieee802154_resume,
.add_virtual_intf = ieee802154_add_iface,
.del_virtual_intf = ieee802154_del_iface,
.set_channel = ieee802154_set_channel,
.set_cca_mode = ieee802154_set_cca_mode,
.set_cca_ed_level = ieee802154_set_cca_ed_level,
.set_tx_power = ieee802154_set_tx_power,
.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,
.set_max_frame_retries = ieee802154_set_max_frame_retries,
.set_lbt_mode = ieee802154_set_lbt_mode,
.set_ackreq_default = ieee802154_set_ackreq_default,
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
.get_llsec_table = ieee802154_get_llsec_table,
.lock_llsec_table = ieee802154_lock_llsec_table,
.unlock_llsec_table = ieee802154_unlock_llsec_table,
/* TODO above */
.set_llsec_params = ieee802154_set_llsec_params,
.get_llsec_params = ieee802154_get_llsec_params,
.add_llsec_key = ieee802154_add_llsec_key,
.del_llsec_key = ieee802154_del_llsec_key,
.add_seclevel = ieee802154_add_seclevel,
.del_seclevel = ieee802154_del_seclevel,
.add_device = ieee802154_add_device,
.del_device = ieee802154_del_device,
.add_devkey = ieee802154_add_devkey,
.del_devkey = ieee802154_del_devkey,
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
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