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| author | Alexander Aring <alex.aring@gmail.com> | 2014-11-12 19:51:56 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-11-13 04:51:58 +0100 |
| commit | 61f2dcba9a03d4fd9342f0d6821af0a46c7098e9 (patch) | |
| tree | 0244a0a47ebe5e22ae41ecff1d7f897c253fef6e /net/mac802154/main.c | |
| parent | a930430b047a0cc118bfc47ca54fcdfbadf091d2 (diff) | |
| download | linux-61f2dcba9a03d4fd9342f0d6821af0a46c7098e9.tar.gz linux-61f2dcba9a03d4fd9342f0d6821af0a46c7098e9.tar.bz2 linux-61f2dcba9a03d4fd9342f0d6821af0a46c7098e9.zip | |
mac802154: add interframe spacing time handling
This patch adds a new interframe spacing time handling into mac802154
layer. Interframe spacing time is a time period between each transmit.
This patch adds a high resolution timer into mac802154 and starts on
xmit complete with corresponding interframe spacing expire time if
ifs_handling is true. We make it variable because it depends if
interframe spacing time is handled by transceiver or mac802154. At the
timer complete function we wake the netdev queue again. This avoids
new frame transmit in range of interframe spacing time.
For synced driver we add no handling of interframe spacing time. This
is currently a lack of support in all synced xmit drivers. I suppose
it's working because the latency of workqueue which is needed to call
spi_sync.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/mac802154/main.c')
| -rw-r--r-- | net/mac802154/main.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/mac802154/main.c b/net/mac802154/main.c index 46c76e005446..0af1be64e8ad 100644 --- a/net/mac802154/main.c +++ b/net/mac802154/main.c @@ -125,6 +125,18 @@ void ieee802154_free_hw(struct ieee802154_hw *hw) } EXPORT_SYMBOL(ieee802154_free_hw); +static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy) +{ + /* TODO warn on empty symbol_duration + * Should be done when all drivers sets this value. + */ + + wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD * + wpan_phy->symbol_duration; + wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD * + wpan_phy->symbol_duration; +} + int ieee802154_register_hw(struct ieee802154_hw *hw) { struct ieee802154_local *local = hw_to_local(hw); @@ -138,8 +150,13 @@ int ieee802154_register_hw(struct ieee802154_hw *hw) goto out; } + hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + local->ifs_timer.function = ieee802154_xmit_ifs_timer; + wpan_phy_set_dev(local->phy, local->hw.parent); + ieee802154_setup_wpan_phy_pib(local->phy); + rc = wpan_phy_register(local->phy); if (rc < 0) goto out_wq; |