Commit 344f8c11 authored by Alexander Aring's avatar Alexander Aring Committed by Marcel Holtmann

mac802154: use atomic ops for sequence incrementation

This patch will use atomic operations for sequence number incrementation
while MAC header generation. Upper layers like af_802154 or 6LoWPAN
could call this function in a parallel context while generating 802.15.4
MAC header before queuing into wpan interfaces transmit queue.
Signed-off-by: default avatarAlexander Aring <alex.aring@gmail.com>
Reviewed-by: default avatarStefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 4a3a8c0c
......@@ -177,9 +177,9 @@ struct wpan_dev {
__le64 extended_addr;
/* MAC BSN field */
u8 bsn;
atomic_t bsn;
/* MAC DSN field */
u8 dsn;
atomic_t dsn;
u8 min_be;
u8 max_be;
......
......@@ -431,7 +431,6 @@ struct ieee802154_mlme_ops {
*/
__le16 (*get_pan_id)(const struct net_device *dev);
__le16 (*get_short_addr)(const struct net_device *dev);
u8 (*get_dsn)(const struct net_device *dev);
};
static inline struct ieee802154_mlme_ops *
......
......@@ -69,13 +69,6 @@ static __le16 lowpan_get_short_addr(const struct net_device *dev)
return ieee802154_mlme_ops(real_dev)->get_short_addr(real_dev);
}
static u8 lowpan_get_dsn(const struct net_device *dev)
{
struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
return ieee802154_mlme_ops(real_dev)->get_dsn(real_dev);
}
static struct header_ops lowpan_header_ops = {
.create = lowpan_header_create,
};
......@@ -106,7 +99,6 @@ static const struct net_device_ops lowpan_netdev_ops = {
static struct ieee802154_mlme_ops lowpan_mlme = {
.get_pan_id = lowpan_get_pan_id,
.get_short_addr = lowpan_get_short_addr,
.get_dsn = lowpan_get_dsn,
};
static void lowpan_setup(struct net_device *dev)
......
......@@ -141,7 +141,6 @@ __le16 mac802154_dev_get_short_addr(const struct net_device *dev);
__le16 mac802154_dev_get_pan_id(const struct net_device *dev);
void mac802154_dev_set_pan_id(struct net_device *dev, __le16 val);
void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan);
u8 mac802154_dev_get_dsn(const struct net_device *dev);
int mac802154_get_params(struct net_device *dev,
struct ieee802154_llsec_params *params);
......
......@@ -368,7 +368,7 @@ static int mac802154_header_create(struct sk_buff *skb,
hdr.fc.type = cb->type;
hdr.fc.security_enabled = cb->secen;
hdr.fc.ack_request = cb->ackreq;
hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
return -EINVAL;
......@@ -468,13 +468,16 @@ ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
enum nl802154_iftype type)
{
struct wpan_dev *wpan_dev = &sdata->wpan_dev;
u8 tmp;
/* set some type-dependent values */
sdata->vif.type = type;
sdata->wpan_dev.iftype = type;
get_random_bytes(&wpan_dev->bsn, 1);
get_random_bytes(&wpan_dev->dsn, 1);
get_random_bytes(&tmp, sizeof(tmp));
atomic_set(&wpan_dev->bsn, tmp);
get_random_bytes(&tmp, sizeof(tmp));
atomic_set(&wpan_dev->dsn, tmp);
/* defaults per 802.15.4-2011 */
wpan_dev->min_be = 3;
......
......@@ -153,7 +153,6 @@ struct ieee802154_mlme_ops mac802154_mlme_wpan = {
.start_req = mac802154_mlme_start_req,
.get_pan_id = mac802154_dev_get_pan_id,
.get_short_addr = mac802154_dev_get_short_addr,
.get_dsn = mac802154_dev_get_dsn,
.llsec = &mac802154_llsec_ops,
......
......@@ -76,15 +76,6 @@ void mac802154_dev_set_pan_id(struct net_device *dev, __le16 val)
spin_unlock_bh(&sdata->mib_lock);
}
u8 mac802154_dev_get_dsn(const struct net_device *dev)
{
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
BUG_ON(dev->type != ARPHRD_IEEE802154);
return sdata->wpan_dev.dsn++;
}
void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan)
{
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
......
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