diff options
| author | Arthur Kiyanovski | 2018-10-11 10:26:19 +0200 |
|---|---|---|
| committer | David S. Miller | 2018-10-11 19:13:51 +0200 |
| commit | 689b2bdaaa1480ad2c14bdc4c6eaf38284549022 (patch) | |
| tree | 8eaa6a71fe4991d2c2f0384b2ac9266271278462 /drivers/net/ethernet/amazon/ena/ena_netdev.c | |
| parent | net: ena: introduce Low Latency Queues data structures according to ENA spec (diff) | |
| download | kernel-qcow2-linux-689b2bdaaa1480ad2c14bdc4c6eaf38284549022.tar.gz kernel-qcow2-linux-689b2bdaaa1480ad2c14bdc4c6eaf38284549022.tar.xz kernel-qcow2-linux-689b2bdaaa1480ad2c14bdc4c6eaf38284549022.zip | |
net: ena: add functions for handling Low Latency Queues in ena_com
This patch introduces APIs for detection, initialization, configuration
and actual usage of low latency queues(LLQ). It extends transmit API with
creation of LLQ descriptors in device memory (which include host buffers
descriptors as well as packet header)
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/amazon/ena/ena_netdev.c')
| -rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_netdev.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index e81f4bbb0600..79a4e87326b7 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -804,12 +804,13 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget) */ smp_mb(); - above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) > - ENA_TX_WAKEUP_THRESH; + above_thresh = ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq, + ENA_TX_WAKEUP_THRESH); if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) { __netif_tx_lock(txq, smp_processor_id()); - above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) > - ENA_TX_WAKEUP_THRESH; + above_thresh = + ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq, + ENA_TX_WAKEUP_THRESH); if (netif_tx_queue_stopped(txq) && above_thresh) { netif_tx_wake_queue(txq); u64_stats_update_begin(&tx_ring->syncp); @@ -1101,7 +1102,7 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi, rx_ring->next_to_clean = next_to_clean; - refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq); + refill_required = ena_com_free_desc(rx_ring->ena_com_io_sq); refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER; /* Optimization, try to batch new rx buffers */ @@ -2110,8 +2111,8 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev) * to sgl_size + 2. one for the meta descriptor and one for header * (if the header is larger than tx_max_header_size). */ - if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) < - (tx_ring->sgl_size + 2))) { + if (unlikely(!ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq, + tx_ring->sgl_size + 2))) { netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n", __func__, qid); @@ -2130,8 +2131,8 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev) */ smp_mb(); - if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq) - > ENA_TX_WAKEUP_THRESH) { + if (ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq, + ENA_TX_WAKEUP_THRESH)) { netif_tx_wake_queue(txq); u64_stats_update_begin(&tx_ring->syncp); tx_ring->tx_stats.queue_wakeup++; @@ -2804,7 +2805,7 @@ static void check_for_empty_rx_ring(struct ena_adapter *adapter) rx_ring = &adapter->rx_ring[i]; refill_required = - ena_com_sq_empty_space(rx_ring->ena_com_io_sq); + ena_com_free_desc(rx_ring->ena_com_io_sq); if (unlikely(refill_required == (rx_ring->ring_size - 1))) { rx_ring->empty_rx_queue++; |