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i40e/i40evf: fix accidental write to ITR registers 

Fix a bug introduced in the force writeback code, where the interrupt
rate was set to 0 (maximum) by accident.

The driver must correctly set the NOITR fields to avoid ITR update
as a side effect of triggering the software interrupt.

Change-ID: I290851ae04ef3811c43aab5ee33242029f26c1a3
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jesse Brandeburg 2015-02-27 09:18:32 +00:00 committed by Jeff Kirsher
parent 3c8e0b989a
commit 97bf75f169
3 changed files with 5 additions and 0 deletions
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1
drivers/net/ethernet/intel/i40e/i40e_txrx.c
View File

@ -859,6 +859,7 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget)
static void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector)
{
u32 val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
I40E_PFINT_DYN_CTLN_ITR_INDX_MASK | /* set noitr */
I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK |
I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK;
/* allow 00 to be written to the index */

1
drivers/net/ethernet/intel/i40evf/i40e_txrx.c
View File

@ -371,6 +371,7 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget)
static void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector)
{
u32 val = I40E_VFINT_DYN_CTLN_INTENA_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK | /* set noitr */
I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
I40E_VFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK;
/* allow 00 to be written to the index */

3
drivers/net/ethernet/intel/i40evf/i40evf_main.c
View File

@ -244,6 +244,7 @@ void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
if (mask & (1 << (i - 1))) {
wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
I40E_VFINT_DYN_CTLN1_INTENA_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
}
}
@ -263,6 +264,7 @@ static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
if (mask & 1) {
dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
}
@ -270,6 +272,7 @@ static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
if (mask & (1 << i)) {
dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
}