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Commit 298deef1 authored by Anjali Singhai Jain's avatar Anjali Singhai Jain Committed by Jeff Kirsher
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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: default avatarAnjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: default avatarKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent b912b2f8

drivers/net/ethernet/intel/i40e/i40e_txrx.c

+8 −1
Original line number Diff line number Diff line
@@ -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,