mac80211/iwlwifi: move virtual A-MDPU queue bookkeeping to iwlwifi

This patch removes all the virtual A-MPDU-queue bookkeeping from
mac80211. Curiously, iwlwifi already does its own bookkeeping, so
it doesn't require much changes except where it needs to handle
starting and stopping the queues in mac80211.

To handle the queue stop/wake properly, we rewrite the software
queue number for aggregation frames and internally to iwlwifi keep
track of the queues that map into the same AC queue, and only talk
to mac80211 about the AC queue. The implementation requires calling
two new functions, iwl_stop_queue and iwl_wake_queue instead of the
mac80211 counterparts.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Reinette Chattre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 12 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 841f7f804bb6..3b83a80e3fe0 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -93,12 +93,9 @@ struct ieee80211_ht_bss_info {
  * enum ieee80211_max_queues - maximum number of queues
  *
  * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
- * @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable
- *      for A-MPDU operation.
  */
 enum ieee80211_max_queues {
         IEEE80211_MAX_QUEUES =          4,
-        IEEE80211_MAX_AMPDU_QUEUES =    16,
 };
 
 /**
@@ -952,12 +949,6 @@ enum ieee80211_hw_flags {
  *      data packets. WMM/QoS requires at least four, these
  *      queues need to have configurable access parameters.
  *
- * @ampdu_queues: number of available hardware transmit queues
- *      for A-MPDU packets, these have no access parameters
- *      because they're used only for A-MPDU frames. Note that
- *      mac80211 will not currently use any of the regular queues
- *      for aggregation.
- *
  * @rate_control_algorithm: rate control algorithm for this hardware.
  *      If unset (NULL), the default algorithm will be used. Must be
  *      set before calling ieee80211_register_hw().
@@ -982,7 +973,6 @@ struct ieee80211_hw {
         int vif_data_size;
         int sta_data_size;
         u16 queues;
-        u16 ampdu_queues;
         u16 max_listen_interval;
         s8 max_signal;
         u8 max_rates;
@@ -1372,8 +1362,8 @@ enum ieee80211_ampdu_mlme_action {
  * @get_tx_stats: Get statistics of the current TX queue status. This is used
  *      to get number of currently queued packets (queue length), maximum queue
  *      size (limit), and total number of packets sent using each TX queue
- *      (count). The 'stats' pointer points to an array that has hw->queues +
- *      hw->ampdu_queues items.
+ *      (count). The 'stats' pointer points to an array that has hw->queues
+ *      items.
  *
  * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
  *      this is only used for IBSS mode BSSID merging and debugging. Is not a