mac80211: use multi-queue master netdevice

This patch updates mac80211 and drivers to be multi-queue aware and
use that instead of the internal queue mapping. Also does a number
of cleanups in various pieces of the code that fall out and reduces
internal mac80211 state size.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 22 insertions, 7 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 8f1ff7ef1667..97d4a537ca2f 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1634,12 +1634,32 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
         if (result < 0)
                 return result;
 
+        /*
+         * We use the number of queues for feature tests (QoS, HT) internally
+         * so restrict them appropriately.
+         */
+#ifdef CONFIG_MAC80211_QOS
+        if (hw->queues > IEEE80211_MAX_QUEUES)
+                hw->queues = IEEE80211_MAX_QUEUES;
+        if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
+                hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
+        if (hw->queues < 4)
+                hw->ampdu_queues = 0;
+#else
+        hw->queues = 1;
+        hw->ampdu_queues = 0;
+#endif
+
         /* for now, mdev needs sub_if_data :/ */
-        mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
-                            "wmaster%d", ether_setup);
+        mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data),
+                               "wmaster%d", ether_setup,
+                               ieee80211_num_queues(hw));
         if (!mdev)
                 goto fail_mdev_alloc;
 
+        if (ieee80211_num_queues(hw) > 1)
+                mdev->features |= NETIF_F_MULTI_QUEUE;
+
         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
         mdev->ieee80211_ptr = &sdata->wdev;
         sdata->wdev.wiphy = local->hw.wiphy;
@@ -1728,11 +1748,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                 goto fail_wep;
         }
 
-        if (hw->queues > IEEE80211_MAX_QUEUES)
-                hw->queues = IEEE80211_MAX_QUEUES;
-        if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
-                hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
-
         ieee80211_install_qdisc(local->mdev);
 
         /* add one default STA interface */