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-rw-r--r--drivers/net/wireless/iwlegacy/4965-mac.c27
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,
1411 il4965_rx_stats(il, rxb); 1411 il4965_rx_stats(il, rxb);
1412} 1412}
1413 1413
1414
1415/*
1416 * mac80211 queues, ACs, hardware queues, FIFOs.
1417 *
1418 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
1419 *
1420 * Mac80211 uses the following numbers, which we get as from it
1421 * by way of skb_get_queue_mapping(skb):
1422 *
1423 * VO 0
1424 * VI 1
1425 * BE 2
1426 * BK 3
1427 *
1428 *
1429 * Regular (not A-MPDU) frames are put into hardware queues corresponding
1430 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
1431 * own queue per aggregation session (RA/TID combination), such queues are
1432 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
1433 * order to map frames to the right queue, we also need an AC->hw queue
1434 * mapping. This is implemented here.
1435 *
1436 * Due to the way hw queues are set up (by the hw specific modules like
1437 * iwl-4965.c), the AC->hw queue mapping is the identity
1438 * mapping.
1439 */
1440
1414static const u8 tid_to_ac[] = { 1441static const u8 tid_to_ac[] = {
1415 IEEE80211_AC_BE, 1442 IEEE80211_AC_BE,
1416 IEEE80211_AC_BK, 1443 IEEE80211_AC_BK,