diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 113 |
1 files changed, 109 insertions, 4 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 3ffc20fae4c6..ea998d2defa4 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -187,24 +187,28 @@ static void igc_clean_tx_ring(struct igc_ring *tx_ring) { u16 i = tx_ring->next_to_clean; struct igc_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i]; + u32 xsk_frames = 0; while (i != tx_ring->next_to_use) { union igc_adv_tx_desc *eop_desc, *tx_desc; switch (tx_buffer->type) { + case IGC_TX_BUFFER_TYPE_XSK: + xsk_frames++; + break; case IGC_TX_BUFFER_TYPE_XDP: xdp_return_frame(tx_buffer->xdpf); + igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); break; case IGC_TX_BUFFER_TYPE_SKB: dev_kfree_skb_any(tx_buffer->skb); + igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); break; default: netdev_warn_once(tx_ring->netdev, "Unknown Tx buffer type\n"); break; } - igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); - /* check for eop_desc to determine the end of the packet */ eop_desc = tx_buffer->next_to_watch; tx_desc = IGC_TX_DESC(tx_ring, i); @@ -234,6 +238,9 @@ static void igc_clean_tx_ring(struct igc_ring *tx_ring) } } + if (tx_ring->xsk_pool && xsk_frames) + xsk_tx_completed(tx_ring->xsk_pool, xsk_frames); + /* reset BQL for queue */ netdev_tx_reset_queue(txring_txq(tx_ring)); @@ -676,6 +683,8 @@ static void igc_configure_tx_ring(struct igc_adapter *adapter, u64 tdba = ring->dma; u32 txdctl = 0; + ring->xsk_pool = igc_get_xsk_pool(adapter, ring); + /* disable the queue */ wr32(IGC_TXDCTL(reg_idx), 0); wrfl(); @@ -2509,6 +2518,65 @@ static void igc_update_tx_stats(struct igc_q_vector *q_vector, q_vector->tx.total_packets += packets; } +static void igc_xdp_xmit_zc(struct igc_ring *ring) +{ + struct xsk_buff_pool *pool = ring->xsk_pool; + struct netdev_queue *nq = txring_txq(ring); + union igc_adv_tx_desc *tx_desc = NULL; + int cpu = smp_processor_id(); + u16 ntu = ring->next_to_use; + struct xdp_desc xdp_desc; + u16 budget; + + if (!netif_carrier_ok(ring->netdev)) + return; + + __netif_tx_lock(nq, cpu); + + budget = igc_desc_unused(ring); + + while (xsk_tx_peek_desc(pool, &xdp_desc) && budget--) { + u32 cmd_type, olinfo_status; + struct igc_tx_buffer *bi; + dma_addr_t dma; + + cmd_type = IGC_ADVTXD_DTYP_DATA | IGC_ADVTXD_DCMD_DEXT | + IGC_ADVTXD_DCMD_IFCS | IGC_TXD_DCMD | + xdp_desc.len; + olinfo_status = xdp_desc.len << IGC_ADVTXD_PAYLEN_SHIFT; + + dma = xsk_buff_raw_get_dma(pool, xdp_desc.addr); + xsk_buff_raw_dma_sync_for_device(pool, dma, xdp_desc.len); + + tx_desc = IGC_TX_DESC(ring, ntu); + tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type); + tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); + tx_desc->read.buffer_addr = cpu_to_le64(dma); + + bi = &ring->tx_buffer_info[ntu]; + bi->type = IGC_TX_BUFFER_TYPE_XSK; + bi->protocol = 0; + bi->bytecount = xdp_desc.len; + bi->gso_segs = 1; + bi->time_stamp = jiffies; + bi->next_to_watch = tx_desc; + + netdev_tx_sent_queue(txring_txq(ring), xdp_desc.len); + + ntu++; + if (ntu == ring->count) + ntu = 0; + } + + ring->next_to_use = ntu; + if (tx_desc) { + igc_flush_tx_descriptors(ring); + xsk_tx_release(pool); + } + + __netif_tx_unlock(nq); +} + /** * igc_clean_tx_irq - Reclaim resources after transmit completes * @q_vector: pointer to q_vector containing needed info @@ -2525,6 +2593,7 @@ static bool igc_clean_tx_irq(struct igc_q_vector *q_vector, int napi_budget) unsigned int i = tx_ring->next_to_clean; struct igc_tx_buffer *tx_buffer; union igc_adv_tx_desc *tx_desc; + u32 xsk_frames = 0; if (test_bit(__IGC_DOWN, &adapter->state)) return true; @@ -2555,19 +2624,22 @@ static bool igc_clean_tx_irq(struct igc_q_vector *q_vector, int napi_budget) total_packets += tx_buffer->gso_segs; switch (tx_buffer->type) { + case IGC_TX_BUFFER_TYPE_XSK: + xsk_frames++; + break; case IGC_TX_BUFFER_TYPE_XDP: xdp_return_frame(tx_buffer->xdpf); + igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); break; case IGC_TX_BUFFER_TYPE_SKB: napi_consume_skb(tx_buffer->skb, napi_budget); + igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); break; default: netdev_warn_once(tx_ring->netdev, "Unknown Tx buffer type\n"); break; } - igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); - /* clear last DMA location and unmap remaining buffers */ while (tx_desc != eop_desc) { tx_buffer++; @@ -2609,6 +2681,14 @@ static bool igc_clean_tx_irq(struct igc_q_vector *q_vector, int napi_budget) igc_update_tx_stats(q_vector, total_packets, total_bytes); + if (tx_ring->xsk_pool) { + if (xsk_frames) + xsk_tx_completed(tx_ring->xsk_pool, xsk_frames); + if (xsk_uses_need_wakeup(tx_ring->xsk_pool)) + xsk_set_tx_need_wakeup(tx_ring->xsk_pool); + igc_xdp_xmit_zc(tx_ring); + } + if (test_bit(IGC_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags)) { struct igc_hw *hw = &adapter->hw; @@ -6336,6 +6416,31 @@ void igc_enable_rx_ring(struct igc_ring *ring) igc_alloc_rx_buffers(ring, igc_desc_unused(ring)); } +static void igc_disable_tx_ring_hw(struct igc_ring *ring) +{ + struct igc_hw *hw = &ring->q_vector->adapter->hw; + u8 idx = ring->reg_idx; + u32 txdctl; + + txdctl = rd32(IGC_TXDCTL(idx)); + txdctl &= ~IGC_TXDCTL_QUEUE_ENABLE; + txdctl |= IGC_TXDCTL_SWFLUSH; + wr32(IGC_TXDCTL(idx), txdctl); +} + +void igc_disable_tx_ring(struct igc_ring *ring) +{ + igc_disable_tx_ring_hw(ring); + igc_clean_tx_ring(ring); +} + +void igc_enable_tx_ring(struct igc_ring *ring) +{ + struct igc_adapter *adapter = ring->q_vector->adapter; + + igc_configure_tx_ring(adapter, ring); +} + /** * igc_init_module - Driver Registration Routine * |