diff options
| -rw-r--r-- | drivers/net/wireless/iwlegacy/4965-mac.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlegacy/4965-mac.c b/drivers/net/wireless/iwlegacy/4965-mac.c index d817d8d3fe18..a8a6461d103f 100644 --- a/drivers/net/wireless/iwlegacy/4965-mac.c +++ b/drivers/net/wireless/iwlegacy/4965-mac.c @@ -1411,6 +1411,33 @@ void il4965_reply_stats(struct il_priv *il, il4965_rx_stats(il, rxb); } + +/* + * mac80211 queues, ACs, hardware queues, FIFOs. + * + * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues + * + * Mac80211 uses the following numbers, which we get as from it + * by way of skb_get_queue_mapping(skb): + * + * VO 0 + * VI 1 + * BE 2 + * BK 3 + * + * + * Regular (not A-MPDU) frames are put into hardware queues corresponding + * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their + * own queue per aggregation session (RA/TID combination), such queues are + * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In + * order to map frames to the right queue, we also need an AC->hw queue + * mapping. This is implemented here. + * + * Due to the way hw queues are set up (by the hw specific modules like + * iwl-4965.c), the AC->hw queue mapping is the identity + * mapping. + */ + static const u8 tid_to_ac[] = { IEEE80211_AC_BE, IEEE80211_AC_BK, |