diff options
| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2014-02-14 02:14:40 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-03-19 17:17:21 -0700 |
| commit | 1943d8ba9507d49fa5cdb51eb1b63810d94e1969 (patch) | |
| tree | 7fe5b89bf44b8c5ec8c4f3177b0159073c94a4e8 /drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | |
| parent | 6c167f582ea93d0b66a187ec06a7c015fecd723a (diff) | |
i40e/i40evf: enable hardware feature head write back
The hardware supports a feature to avoid updating the descriptor
ring by marking each descriptor with a DD bit, and instead
writes a memory location with an update to where the driver
should clean up to. Enable this feature.
Change-ID: I5da4e0681f0b581a6401c950a81808792267fe57
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 2086a62062c..b2da079cd69 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -230,6 +230,9 @@ static int i40e_config_vsi_tx_queue(struct i40e_vf *vf, u16 vsi_idx, tx_ctx.qlen = info->ring_len; tx_ctx.rdylist = le16_to_cpu(pf->vsi[vsi_idx]->info.qs_handle[0]); tx_ctx.rdylist_act = 0; + tx_ctx.head_wb_ena = 1; + tx_ctx.head_wb_addr = info->dma_ring_addr + + (info->ring_len * sizeof(struct i40e_tx_desc)); /* clear the context in the HMC */ ret = i40e_clear_lan_tx_queue_context(hw, pf_queue_id); |