diff options
Diffstat (limited to 'drivers/net/ethernet/intel/i40evf/i40e_txrx.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 94 |
1 files changed, 8 insertions, 86 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 7e91d825c760..830979380466 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -140,65 +140,6 @@ static inline u32 i40e_get_head(struct i40e_ring *tx_ring) return le32_to_cpu(*(volatile __le32 *)head); } -/** - * i40e_get_tx_pending - how many tx descriptors not processed - * @tx_ring: the ring of descriptors - * - * Since there is no access to the ring head register - * in XL710, we need to use our local copies - **/ -static u32 i40e_get_tx_pending(struct i40e_ring *ring) -{ - u32 head, tail; - - head = i40e_get_head(ring); - tail = readl(ring->tail); - - if (head != tail) - return (head < tail) ? - tail - head : (tail + ring->count - head); - - return 0; -} - -/** - * i40e_check_tx_hang - Is there a hang in the Tx queue - * @tx_ring: the ring of descriptors - **/ -static bool i40e_check_tx_hang(struct i40e_ring *tx_ring) -{ - u32 tx_done = tx_ring->stats.packets; - u32 tx_done_old = tx_ring->tx_stats.tx_done_old; - u32 tx_pending = i40e_get_tx_pending(tx_ring); - bool ret = false; - - clear_check_for_tx_hang(tx_ring); - - /* Check for a hung queue, but be thorough. This verifies - * that a transmit has been completed since the previous - * check AND there is at least one packet pending. The - * ARMED bit is set to indicate a potential hang. The - * bit is cleared if a pause frame is received to remove - * false hang detection due to PFC or 802.3x frames. By - * requiring this to fail twice we avoid races with - * PFC clearing the ARMED bit and conditions where we - * run the check_tx_hang logic with a transmit completion - * pending but without time to complete it yet. - */ - if ((tx_done_old == tx_done) && tx_pending) { - /* make sure it is true for two checks in a row */ - ret = test_and_set_bit(__I40E_HANG_CHECK_ARMED, - &tx_ring->state); - } else if (tx_done_old == tx_done && - (tx_pending < I40E_MIN_DESC_PENDING) && (tx_pending > 0)) { - /* update completed stats and disarm the hang check */ - tx_ring->tx_stats.tx_done_old = tx_done; - clear_bit(__I40E_HANG_CHECK_ARMED, &tx_ring->state); - } - - return ret; -} - #define WB_STRIDE 0x3 /** @@ -304,6 +245,10 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) tx_ring->q_vector->tx.total_bytes += total_bytes; tx_ring->q_vector->tx.total_packets += total_packets; + /* check to see if there are any non-cache aligned descriptors + * waiting to be written back, and kick the hardware to force + * them to be written back in case of napi polling + */ if (budget && !((i & WB_STRIDE) == WB_STRIDE) && !test_bit(__I40E_DOWN, &tx_ring->vsi->state) && @@ -312,29 +257,6 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) else tx_ring->arm_wb = false; - if (check_for_tx_hang(tx_ring) && i40e_check_tx_hang(tx_ring)) { - /* schedule immediate reset if we believe we hung */ - dev_info(tx_ring->dev, "Detected Tx Unit Hang\n" - " VSI <%d>\n" - " Tx Queue <%d>\n" - " next_to_use <%x>\n" - " next_to_clean <%x>\n", - tx_ring->vsi->seid, - tx_ring->queue_index, - tx_ring->next_to_use, i); - - netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); - - dev_info(tx_ring->dev, - "tx hang detected on queue %d, resetting adapter\n", - tx_ring->queue_index); - - tx_ring->netdev->netdev_ops->ndo_tx_timeout(tx_ring->netdev); - - /* the adapter is about to reset, no point in enabling stuff */ - return true; - } - netdev_tx_completed_queue(netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index), total_packets, total_bytes); @@ -355,16 +277,16 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) } } - return budget > 0; + return !!budget; } /** - * i40e_force_wb -Arm hardware to do a wb on noncache aligned descriptors + * i40evf_force_wb -Arm hardware to do a wb on noncache aligned descriptors * @vsi: the VSI we care about * @q_vector: the vector on which to force writeback * **/ -static void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector) +static void i40evf_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector) { u16 flags = q_vector->tx.ring[0].flags; @@ -1385,7 +1307,7 @@ int i40evf_napi_poll(struct napi_struct *napi, int budget) /* If work not completed, return budget and polling will return */ if (!clean_complete) { if (arm_wb) - i40e_force_wb(vsi, q_vector); + i40evf_force_wb(vsi, q_vector); return budget; } |