iwlwifi: pcie: configure more RFH settings

Fine tune RFH registers further:
* Set default queue explicitly
* Set RFH to drop frames exceeding RB size
* Set the maximum rx transfer size to DRAM to 128 instead of 64

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
index c0db681d66d1..398dd9332345 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
@@ -783,16 +783,26 @@ static void iwl_pcie_rx_mq_hw_init(struct iwl_trans *trans)
          * Single frame mode
          * Rx buffer size 4 or 8k or 12k
          * Min RB size 4 or 8
+         * Drop frames that exceed RB size
          * 512 RBDs
          */
         iwl_write_prph(trans, RFH_RXF_DMA_CFG,
                        RFH_DMA_EN_ENABLE_VAL |
                        rb_size | RFH_RXF_DMA_SINGLE_FRAME_MASK |
                        RFH_RXF_DMA_MIN_RB_4_8 |
+                       RFH_RXF_DMA_DROP_TOO_LARGE_MASK |
                        RFH_RXF_DMA_RBDCB_SIZE_512);
 
+        /*
+         * Activate DMA snooping.
+         * Set RX DMA chunk size to 128 bit
+         * Default queue is 0
+         */
         iwl_write_prph(trans, RFH_GEN_CFG, RFH_GEN_CFG_RFH_DMA_SNOOP |
-                                          RFH_GEN_CFG_SERVICE_DMA_SNOOP);
+                       RFH_GEN_CFG_RB_CHUNK_SIZE |
+                       (DEFAULT_RXQ_NUM << RFH_GEN_CFG_DEFAULT_RXQ_NUM_POS) |
+                       RFH_GEN_CFG_SERVICE_DMA_SNOOP);
+        /* Enable the relevant rx queues */
         iwl_write_prph(trans, RFH_RXF_RXQ_ACTIVE, enabled);
 
         /* Set interrupt coalescing timer to default (2048 usecs) */