iwmc3200wifi: rx aggregation support

When the device receives an A-MSDU frame (indicated by flag
IWM_RX_TICKET_AMSDU_MSK), use ieee80211_amsdu_to_8023s to convert
it to a list of 802.3 frames and handled them to upper layer.

Cc: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 41 insertions, 5 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/rx.c b/drivers/net/wireless/iwmc3200wifi/rx.c
index 72c27a3e5528..6bd253ac533f 100644
--- a/drivers/net/wireless/iwmc3200wifi/rx.c
+++ b/drivers/net/wireless/iwmc3200wifi/rx.c
@@ -1534,6 +1534,33 @@ static void classify8023(struct sk_buff *skb)
         }
 }
 
+static void iwm_rx_process_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
+{
+        struct wireless_dev *wdev = iwm_to_wdev(iwm);
+        struct net_device *ndev = iwm_to_ndev(iwm);
+        struct sk_buff_head list;
+        struct sk_buff *frame;
+
+        IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
+
+        __skb_queue_head_init(&list);
+        ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
+
+        while ((frame = __skb_dequeue(&list))) {
+                ndev->stats.rx_packets++;
+                ndev->stats.rx_bytes += frame->len;
+
+                frame->protocol = eth_type_trans(frame, ndev);
+                frame->ip_summed = CHECKSUM_NONE;
+                memset(frame->cb, 0, sizeof(frame->cb));
+
+                if (netif_rx_ni(frame) == NET_RX_DROP) {
+                        IWM_ERR(iwm, "Packet dropped\n");
+                        ndev->stats.rx_dropped++;
+                }
+        }
+}
+
 static void iwm_rx_process_packet(struct iwm_priv *iwm,
                                   struct iwm_rx_packet *packet,
                                   struct iwm_rx_ticket_node *ticket_node)
@@ -1548,25 +1575,34 @@ static void iwm_rx_process_packet(struct iwm_priv *iwm,
         switch (le16_to_cpu(ticket_node->ticket->action)) {
         case IWM_RX_TICKET_RELEASE:
                 IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
-                classify8023(skb);
+
                 iwm_rx_adjust_packet(iwm, packet, ticket_node);
+                skb->dev = iwm_to_ndev(iwm);
+                classify8023(skb);
+
+                if (le16_to_cpu(ticket_node->ticket->flags) &
+                    IWM_RX_TICKET_AMSDU_MSK) {
+                        iwm_rx_process_amsdu(iwm, skb);
+                        break;
+                }
+
                 ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
                 if (ret < 0) {
                         IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
                                    "%d\n", ret);
+                        kfree_skb(packet->skb);
                         break;
                 }
 
                 IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
 
-                skb->dev = iwm_to_ndev(iwm);
+                ndev->stats.rx_packets++;
+                ndev->stats.rx_bytes += skb->len;
+
                 skb->protocol = eth_type_trans(skb, ndev);
                 skb->ip_summed = CHECKSUM_NONE;
                 memset(skb->cb, 0, sizeof(skb->cb));
 
-                ndev->stats.rx_packets++;
-                ndev->stats.rx_bytes += skb->len;
-
                 if (netif_rx_ni(skb) == NET_RX_DROP) {
                         IWM_ERR(iwm, "Packet dropped\n");
                         ndev->stats.rx_dropped++;