i40e/i40evf: unhide and enable to one prefena field

The PREFENA field in the receive host memory cache (RX-HMC)
must be visible in order to be set to 1 at driver init for
best performance.

Change-ID: I16b0bcd84cf56f4b6c938201ff5e954bee5a1992
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@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_lan_hmc.c b/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c
index d5d98fe..5c341ae 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.c
@@ -747,6 +747,7 @@ static struct i40e_context_ele i40e_hmc_rxq_ce_info[] = {
        { I40E_HMC_STORE(i40e_hmc_obj_rxq, tphdata_ena),  1,    195 },
        { I40E_HMC_STORE(i40e_hmc_obj_rxq, tphhead_ena),  1,    196 },
        { I40E_HMC_STORE(i40e_hmc_obj_rxq, lrxqthresh),   3,    198 },
+       { I40E_HMC_STORE(i40e_hmc_obj_rxq, prefena),      1,    201 },
        { 0 }
 };
 

diff --git a/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.h b/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.h
index 341de92..eb65fe2 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_lan_hmc.h
@@ -56,6 +56,7 @@ struct i40e_hmc_obj_rxq {
        u8  tphdata_ena;
        u8  tphhead_ena;
        u8  lrxqthresh;
+       u8  prefena;    /* NOTE: normally must be set to 1 at init */
 };
 
 /* Tx queue context data */

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 10f0f41..6f1c464 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -3140,6 +3140,8 @@ static void i40e_netpoll(struct net_device *netdev)
        pf->flags &= ~I40E_FLAG_IN_NETPOLL;
 }
 #endif
+       /* set the prefena field to 1 because the manual says to */
+       rx_ctx.prefena = 1;
 
 /**
  * i40e_vsi_control_tx - Start or stop a VSI's rings

diff --git a/drivers/net/ethernet/intel/i40evf/i40e_lan_hmc.h b/drivers/net/ethernet/intel/i40evf/i40e_lan_hmc.h
index 17e42ca..775fcb2 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40e_lan_hmc.h
+++ b/drivers/net/ethernet/intel/i40evf/i40e_lan_hmc.h
@@ -53,6 +53,7 @@ struct i40e_hmc_obj_rxq {
        u8  tphdata_ena;
        u8  tphhead_ena;
        u8  lrxqthresh;
+       u8  prefena;    /* NOTE: normally must be set to 1 at init */
 };
 
 /* Tx queue context data */