i40e: Record dma buffer info for dummy packets

Save information that we can use while cleaning the tx ring. Also record
the time_stamp since we will need it to check tx hangs.

Change-Id: Ia3f1c17f6fec9bcb7fef2542d77eac7f6c4f115c
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 2584d6b610ee92580d1ce33dee027178b8b3a537..fac4fb37f87b23a48f171b321354a040024b0c9f 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -77,7 +77,6 @@ int i40e_program_fdir_filter(struct i40e_fdir_data *fdir_data,
        /* grab the next descriptor */
        i = tx_ring->next_to_use;
        fdir_desc = I40E_TX_FDIRDESC(tx_ring, i);
-       tx_buf = &tx_ring->tx_bi[i];
 
        tx_ring->next_to_use = (i + 1 < tx_ring->count) ? i + 1 : 0;
 
@@ -129,15 +128,23 @@ int i40e_program_fdir_filter(struct i40e_fdir_data *fdir_data,
        /* Now program a dummy descriptor */
        i = tx_ring->next_to_use;
        tx_desc = I40E_TX_DESC(tx_ring, i);
+       tx_buf = &tx_ring->tx_bi[i];
 
        tx_ring->next_to_use = (i + 1 < tx_ring->count) ? i + 1 : 0;
 
+       /* record length, and DMA address */
+       dma_unmap_len_set(tx_buf, len, I40E_FDIR_MAX_RAW_PACKET_LOOKUP);
+       dma_unmap_addr_set(tx_buf, dma, dma);
+
        tx_desc->buffer_addr = cpu_to_le64(dma);
        td_cmd = I40E_TXD_CMD | I40E_TX_DESC_CMD_DUMMY;
 
        tx_desc->cmd_type_offset_bsz =
                build_ctob(td_cmd, 0, I40E_FDIR_MAX_RAW_PACKET_LOOKUP, 0);
 
+       /* set the timestamp */
+       tx_buf->time_stamp = jiffies;
+
        /* Force memory writes to complete before letting h/w
         * know there are new descriptors to fetch.  (Only
         * applicable for weak-ordered memory model archs,