From dbadbbe235f82f13224c85d29e65cf859afaa18c Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Thu, 7 Sep 2017 08:05:49 -0400 Subject: i40e/i40evf: always set the CLEARPBA flag when re-enabling interrupts In the past we changed driver behavior to not clear the PBA when re-enabling interrupts. This change was motivated by the flawed belief that clearing the PBA would cause a lost interrupt if a receive interrupt occurred while interrupts were disabled. According to empirical testing this isn't the case. Additionally, the data sheet specifically says that we should set the CLEARPBA bit when re-enabling interrupts in a polling setup. This reverts commit 40d72a509862 ("i40e/i40evf: don't lose interrupts") Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e.h | 5 +---- drivers/net/ethernet/intel/i40e/i40e_main.c | 11 +++++------ drivers/net/ethernet/intel/i40e/i40e_txrx.c | 6 ++---- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 2 +- drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 4 +--- 5 files changed, 10 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index 7baf6d8a84dd..8139b4ee1dc3 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -949,9 +949,6 @@ static inline void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector) struct i40e_hw *hw = &pf->hw; u32 val; - /* definitely clear the PBA here, as this function is meant to - * clean out all previous interrupts AND enable the interrupt - */ val = I40E_PFINT_DYN_CTLN_INTENA_MASK | I40E_PFINT_DYN_CTLN_CLEARPBA_MASK | (I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT); @@ -960,7 +957,7 @@ static inline void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector) } void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf); -void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf, bool clearpba); +void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf); int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); int i40e_open(struct net_device *netdev); int i40e_close(struct net_device *netdev); diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index d4b0cc36afb1..00a83afb02e9 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -3403,15 +3403,14 @@ void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf) /** * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0 * @pf: board private structure - * @clearpba: true when all pending interrupt events should be cleared **/ -void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf, bool clearpba) +void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf) { struct i40e_hw *hw = &pf->hw; u32 val; val = I40E_PFINT_DYN_CTL0_INTENA_MASK | - (clearpba ? I40E_PFINT_DYN_CTL0_CLEARPBA_MASK : 0) | + I40E_PFINT_DYN_CTL0_CLEARPBA_MASK | (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT); wr32(hw, I40E_PFINT_DYN_CTL0, val); @@ -3597,7 +3596,7 @@ static int i40e_vsi_enable_irq(struct i40e_vsi *vsi) for (i = 0; i < vsi->num_q_vectors; i++) i40e_irq_dynamic_enable(vsi, i); } else { - i40e_irq_dynamic_enable_icr0(pf, true); + i40e_irq_dynamic_enable_icr0(pf); } i40e_flush(&pf->hw); @@ -3746,7 +3745,7 @@ enable_intr: wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask); if (!test_bit(__I40E_DOWN, pf->state)) { i40e_service_event_schedule(pf); - i40e_irq_dynamic_enable_icr0(pf, false); + i40e_irq_dynamic_enable_icr0(pf); } return ret; @@ -8455,7 +8454,7 @@ static int i40e_setup_misc_vector(struct i40e_pf *pf) i40e_flush(hw); - i40e_irq_dynamic_enable_icr0(pf, true); + i40e_irq_dynamic_enable_icr0(pf); return err; } diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 3bd176606c09..616abf79253e 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2202,9 +2202,7 @@ static u32 i40e_buildreg_itr(const int type, const u16 itr) u32 val; val = I40E_PFINT_DYN_CTLN_INTENA_MASK | - /* Don't clear PBA because that can cause lost interrupts that - * came in while we were cleaning/polling - */ + I40E_PFINT_DYN_CTLN_CLEARPBA_MASK | (type << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT) | (itr << I40E_PFINT_DYN_CTLN_INTERVAL_SHIFT); @@ -2241,7 +2239,7 @@ static inline void i40e_update_enable_itr(struct i40e_vsi *vsi, /* If we don't have MSIX, then we only need to re-enable icr0 */ if (!(vsi->back->flags & I40E_FLAG_MSIX_ENABLED)) { - i40e_irq_dynamic_enable_icr0(vsi->back, false); + i40e_irq_dynamic_enable_icr0(vsi->back); return; } diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index c062d74d21f3..10298956a81b 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -1358,7 +1358,7 @@ err_alloc: i40e_free_vfs(pf); err_iov: /* Re-enable interrupt 0. */ - i40e_irq_dynamic_enable_icr0(pf, false); + i40e_irq_dynamic_enable_icr0(pf); return ret; } diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 37e1de886d48..fe817e2b6fef 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -1409,9 +1409,7 @@ static u32 i40e_buildreg_itr(const int type, const u16 itr) u32 val; val = I40E_VFINT_DYN_CTLN1_INTENA_MASK | - /* Don't clear PBA because that can cause lost interrupts that - * came in while we were cleaning/polling - */ + I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK | (type << I40E_VFINT_DYN_CTLN1_ITR_INDX_SHIFT) | (itr << I40E_VFINT_DYN_CTLN1_INTERVAL_SHIFT); -- cgit v1.2.3