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mvebu: Add BQL patch for mvneta driver.

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This adds the patch submitted to upstream that adds BQL to the mvneta
driver: https://patchwork.kernel.org/patch/9328413/. Helps latency under
load when the physical link is saturated.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
This commit is contained in:
Toke Høiland-Jørgensen 2016-11-21 11:12:09 +01:00 committed by John Crispin
parent a72e1692b8
commit 8aa9f6bd71
1 changed files with 83 additions and 0 deletions
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83
target/linux/mvebu/patches-4.4/147-net-mvneta-add-BQL-support.patch Normal file
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@ -0,0 +1,83 @@
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -1695,8 +1695,10 @@ static struct mvneta_tx_queue *mvneta_tx
/* Free tx queue skbuffs */
static void mvneta_txq_bufs_free(struct mvneta_port *pp,
- struct mvneta_tx_queue *txq, int num)
+ struct mvneta_tx_queue *txq, int num,
+ struct netdev_queue *nq)
{
+ unsigned int bytes_compl = 0, pkts_compl = 0;
int i;
for (i = 0; i < num; i++) {
@@ -1704,6 +1706,11 @@ static void mvneta_txq_bufs_free(struct
txq->txq_get_index;
struct sk_buff *skb = txq->tx_skb[txq->txq_get_index];
+ if (skb) {
+ bytes_compl += skb->len;
+ pkts_compl++;
+ }
+
mvneta_txq_inc_get(txq);
if (!IS_TSO_HEADER(txq, tx_desc->buf_phys_addr))
@@ -1714,6 +1721,8 @@ static void mvneta_txq_bufs_free(struct
continue;
dev_kfree_skb_any(skb);
}
+
+ netdev_tx_completed_queue(nq, pkts_compl, bytes_compl);
}
/* Handle end of transmission */
@@ -1727,7 +1736,7 @@ static void mvneta_txq_done(struct mvnet
if (!tx_done)
return;
- mvneta_txq_bufs_free(pp, txq, tx_done);
+ mvneta_txq_bufs_free(pp, txq, tx_done, nq);
txq->count -= tx_done;
@@ -2334,6 +2343,8 @@ out:
struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id);
+ netdev_tx_sent_queue(nq, len);
+
txq->count += frags;
mvneta_txq_pend_desc_add(pp, txq, frags);
@@ -2358,9 +2369,10 @@ static void mvneta_txq_done_force(struct
struct mvneta_tx_queue *txq)
{
+ struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id);
int tx_done = txq->count;
- mvneta_txq_bufs_free(pp, txq, tx_done);
+ mvneta_txq_bufs_free(pp, txq, tx_done, nq);
/* reset txq */
txq->count = 0;
@@ -2841,6 +2853,8 @@ static int mvneta_txq_init(struct mvneta
static void mvneta_txq_deinit(struct mvneta_port *pp,
struct mvneta_tx_queue *txq)
{
+ struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id);
+
kfree(txq->tx_skb);
if (txq->tso_hdrs)
@@ -2852,6 +2866,8 @@ static void mvneta_txq_deinit(struct mvn
txq->size * MVNETA_DESC_ALIGNED_SIZE,
txq->descs, txq->descs_phys);
+ netdev_tx_reset_queue(nq);
+
txq->descs = NULL;
txq->last_desc = 0;
txq->next_desc_to_proc = 0;