sfc: Support for byte queue limits

Changes to sfc to use byte queue limits.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c
index df88c54..ab4c635 100644 (file)
--- a/drivers/net/ethernet/sfc/tx.c
+++ b/drivers/net/ethernet/sfc/tx.c
@@ -31,7 +31,9 @@
 #define EFX_TXQ_THRESHOLD(_efx) ((_efx)->txq_entries / 2u)
 
 static void efx_dequeue_buffer(struct efx_tx_queue *tx_queue,
-                              struct efx_tx_buffer *buffer)
+                              struct efx_tx_buffer *buffer,
+                              unsigned int *pkts_compl,
+                              unsigned int *bytes_compl)
 {
        if (buffer->unmap_len) {
                struct pci_dev *pci_dev = tx_queue->efx->pci_dev;
@@ -48,6 +50,8 @@ static void efx_dequeue_buffer(struct efx_tx_queue *tx_queue,
        }
 
        if (buffer->skb) {
+               (*pkts_compl)++;
+               (*bytes_compl) += buffer->skb->len;
                dev_kfree_skb_any((struct sk_buff *) buffer->skb);
                buffer->skb = NULL;
                netif_vdbg(tx_queue->efx, tx_done, tx_queue->efx->net_dev,
@@ -250,6 +254,8 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
        buffer->skb = skb;
        buffer->continuation = false;
 
+       netdev_tx_sent_queue(tx_queue->core_txq, skb->len);
+
        /* Pass off to hardware */
        efx_nic_push_buffers(tx_queue);
 
@@ -267,10 +273,11 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
  unwind:
        /* Work backwards until we hit the original insert pointer value */
        while (tx_queue->insert_count != tx_queue->write_count) {
+               unsigned int pkts_compl = 0, bytes_compl = 0;
                --tx_queue->insert_count;
                insert_ptr = tx_queue->insert_count & tx_queue->ptr_mask;
                buffer = &tx_queue->buffer[insert_ptr];
-               efx_dequeue_buffer(tx_queue, buffer);
+               efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl);
                buffer->len = 0;
        }
 
@@ -293,7 +300,9 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
  * specified index.
  */
 static void efx_dequeue_buffers(struct efx_tx_queue *tx_queue,
-                               unsigned int index)
+                               unsigned int index,
+                               unsigned int *pkts_compl,
+                               unsigned int *bytes_compl)
 {
        struct efx_nic *efx = tx_queue->efx;
        unsigned int stop_index, read_ptr;
@@ -311,7 +320,7 @@ static void efx_dequeue_buffers(struct efx_tx_queue *tx_queue,
                        return;
                }
 
-               efx_dequeue_buffer(tx_queue, buffer);
+               efx_dequeue_buffer(tx_queue, buffer, pkts_compl, bytes_compl);
                buffer->continuation = true;
                buffer->len = 0;
 
@@ -422,10 +431,12 @@ void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index)
 {
        unsigned fill_level;
        struct efx_nic *efx = tx_queue->efx;
+       unsigned int pkts_compl = 0, bytes_compl = 0;
 
        EFX_BUG_ON_PARANOID(index > tx_queue->ptr_mask);
 
-       efx_dequeue_buffers(tx_queue, index);
+       efx_dequeue_buffers(tx_queue, index, &pkts_compl, &bytes_compl);
+       netdev_tx_completed_queue(tx_queue->core_txq, pkts_compl, bytes_compl);
 
        /* See if we need to restart the netif queue.  This barrier
         * separates the update of read_count from the test of the
@@ -515,13 +526,15 @@ void efx_release_tx_buffers(struct efx_tx_queue *tx_queue)
 
        /* Free any buffers left in the ring */
        while (tx_queue->read_count != tx_queue->write_count) {
+               unsigned int pkts_compl = 0, bytes_compl = 0;
                buffer = &tx_queue->buffer[tx_queue->read_count & tx_queue->ptr_mask];
-               efx_dequeue_buffer(tx_queue, buffer);
+               efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl);
                buffer->continuation = true;
                buffer->len = 0;
 
                ++tx_queue->read_count;
        }
+       netdev_tx_reset_queue(tx_queue->core_txq);
 }
 
 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue)
@@ -1163,6 +1176,8 @@ static int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue,
        /* Pass off to hardware */
        efx_nic_push_buffers(tx_queue);
 
+       netdev_tx_sent_queue(tx_queue->core_txq, skb->len);
+
        tx_queue->tso_bursts++;
        return NETDEV_TX_OK;