From 427025592955d245997b12923111e85f07850d5f Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Thu, 7 Sep 2017 08:05:48 -0400 Subject: i40e/i40evf: fix incorrect default ITR values on driver load The ITR register expects to be programmed in units of 2 microseconds. Because of this, all of the drivers I40E_ITR_* constants are in terms of this 2 microsecond register. Unfortunately, the rx_itr_default value is expected to be programmed in microseconds. Effectively the driver defaults to an ITR value of half the expected value (in terms of minimum microseconds between interrupts). Fix this by changing the default values to be calculated using ITR_REG_TO_USEC macro which indicates that we're converting from the register units into microseconds. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++-- drivers/net/ethernet/intel/i40e/i40e_txrx.h | 6 ++++-- drivers/net/ethernet/intel/i40evf/i40e_txrx.h | 6 ++++-- drivers/net/ethernet/intel/i40evf/i40evf_main.c | 4 ++-- 4 files changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 60b11fdeca2d..d4b0cc36afb1 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -8983,8 +8983,8 @@ static int i40e_sw_init(struct i40e_pf *pf) I40E_FLAG_MSIX_ENABLED; /* Set default ITR */ - pf->rx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF; - pf->tx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF; + pf->rx_itr_default = I40E_ITR_RX_DEF; + pf->tx_itr_default = I40E_ITR_TX_DEF; /* Depending on PF configurations, it is possible that the RSS * maximum might end up larger than the available queues diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index a4e3e665a1a1..c3156aa3f709 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -38,8 +38,10 @@ #define I40E_ITR_8K 0x003E #define I40E_ITR_4K 0x007A #define I40E_MAX_INTRL 0x3B /* reg uses 4 usec resolution */ -#define I40E_ITR_RX_DEF I40E_ITR_20K -#define I40E_ITR_TX_DEF I40E_ITR_20K +#define I40E_ITR_RX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \ + I40E_ITR_DYNAMIC) +#define I40E_ITR_TX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \ + I40E_ITR_DYNAMIC) #define I40E_ITR_DYNAMIC 0x8000 /* use top bit as a flag */ #define I40E_MIN_INT_RATE 250 /* ~= 1000000 / (I40E_MAX_ITR * 2) */ #define I40E_MAX_INT_RATE 500000 /* == 1000000 / (I40E_MIN_ITR * 2) */ diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h index d8ca802a71a9..8f9830d7649a 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h @@ -38,8 +38,10 @@ #define I40E_ITR_8K 0x003E #define I40E_ITR_4K 0x007A #define I40E_MAX_INTRL 0x3B /* reg uses 4 usec resolution */ -#define I40E_ITR_RX_DEF I40E_ITR_20K -#define I40E_ITR_TX_DEF I40E_ITR_20K +#define I40E_ITR_RX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \ + I40E_ITR_DYNAMIC) +#define I40E_ITR_TX_DEF (ITR_REG_TO_USEC(I40E_ITR_20K) | \ + I40E_ITR_DYNAMIC) #define I40E_ITR_DYNAMIC 0x8000 /* use top bit as a flag */ #define I40E_MIN_INT_RATE 250 /* ~= 1000000 / (I40E_MAX_ITR * 2) */ #define I40E_MAX_INT_RATE 500000 /* == 1000000 / (I40E_MIN_ITR * 2) */ diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c index f62d9565c7b5..5bcbd46e2f6c 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -1223,7 +1223,7 @@ static int i40evf_alloc_queues(struct i40evf_adapter *adapter) tx_ring->netdev = adapter->netdev; tx_ring->dev = &adapter->pdev->dev; tx_ring->count = adapter->tx_desc_count; - tx_ring->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF); + tx_ring->tx_itr_setting = I40E_ITR_TX_DEF; if (adapter->flags & I40EVF_FLAG_WB_ON_ITR_CAPABLE) tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR; @@ -1232,7 +1232,7 @@ static int i40evf_alloc_queues(struct i40evf_adapter *adapter) rx_ring->netdev = adapter->netdev; rx_ring->dev = &adapter->pdev->dev; rx_ring->count = adapter->rx_desc_count; - rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF); + rx_ring->rx_itr_setting = I40E_ITR_RX_DEF; } adapter->num_active_queues = num_active_queues; -- cgit v1.2.3