iwlwifi: advertise maximal MPDU length when Rx MQ is supported

The new hardware that supports multiple queue also
de-aggregates A-MSDUs. This means that we can advertise
the maximal size of A-MSDUs regardless of the receive
buffer's size.
In order to be able to forcefully use a lower A-MSDU size,
add a default value for the module parameter. Pre-9000
will have a default of 4K, and 9000 will have 12K.
Setting the amsdu_size module parameter to 4K will limit
the A-MSDU on 9000 as well.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index a68054f127fa..64d2b4f04ac2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -603,6 +603,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
         switch (iwlwifi_mod_params.amsdu_size) {
+        case IWL_AMSDU_DEF:
         case IWL_AMSDU_4K:
                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
                 break;
@@ -617,6 +618,10 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
                        iwlwifi_mod_params.amsdu_size);
                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
         }
+
+        /* the hardware splits the A-MSDU */
+        if (mvm->cfg->mq_rx_supported)
+                trans_cfg.rx_buf_size = IWL_AMSDU_4K;
         trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
                                                IWL_UCODE_TLV_API_WIDE_CMD_HDR);