Linux-libre 4.2-gnu

1 files changed, 79 insertions, 4 deletions

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 6043734ea..09ff09f82 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1230,7 +1230,6 @@ static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
 		new_skb = skb_realloc_headroom(skb, sizeof(*status));
 		dev_kfree_skb(skb);
 		if (!new_skb) {
-			dev->stats.tx_errors++;
 			dev->stats.tx_dropped++;
 			return NULL;
 		}
@@ -1465,7 +1464,6 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
 
 		if (unlikely(!skb)) {
 			dev->stats.rx_dropped++;
-			dev->stats.rx_errors++;
 			goto next;
 		}
 
@@ -1493,7 +1491,6 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
 		if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
 			netif_err(priv, rx_status, dev,
 				  "dropping fragmented packet!\n");
-			dev->stats.rx_dropped++;
 			dev->stats.rx_errors++;
 			dev_kfree_skb_any(skb);
 			goto next;
@@ -1515,7 +1512,6 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
 				dev->stats.rx_frame_errors++;
 			if (dma_flag & DMA_RX_LG)
 				dev->stats.rx_length_errors++;
-			dev->stats.rx_dropped++;
 			dev->stats.rx_errors++;
 			dev_kfree_skb_any(skb);
 			goto next;
@@ -2130,6 +2126,8 @@ static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
 	int ret = 0;
 	int timeout = 0;
 	u32 reg;
+	u32 dma_ctrl;
+	int i;
 
 	/* Disable TDMA to stop add more frames in TX DMA */
 	reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
@@ -2173,6 +2171,20 @@ static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
 		ret = -ETIMEDOUT;
 	}
 
+	dma_ctrl = 0;
+	for (i = 0; i < priv->hw_params->rx_queues; i++)
+		dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+	reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
+	reg &= ~dma_ctrl;
+	bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
+
+	dma_ctrl = 0;
+	for (i = 0; i < priv->hw_params->tx_queues; i++)
+		dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
+	reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
+	reg &= ~dma_ctrl;
+	bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
+
 	return ret;
 }
 
@@ -2770,12 +2782,75 @@ static int bcmgenet_close(struct net_device *dev)
 	return ret;
 }
 
+static void bcmgenet_dump_tx_queue(struct bcmgenet_tx_ring *ring)
+{
+	struct bcmgenet_priv *priv = ring->priv;
+	u32 p_index, c_index, intsts, intmsk;
+	struct netdev_queue *txq;
+	unsigned int free_bds;
+	unsigned long flags;
+	bool txq_stopped;
+
+	if (!netif_msg_tx_err(priv))
+		return;
+
+	txq = netdev_get_tx_queue(priv->dev, ring->queue);
+
+	spin_lock_irqsave(&ring->lock, flags);
+	if (ring->index == DESC_INDEX) {
+		intsts = ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
+		intmsk = UMAC_IRQ_TXDMA_DONE | UMAC_IRQ_TXDMA_MBDONE;
+	} else {
+		intsts = ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
+		intmsk = 1 << ring->index;
+	}
+	c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
+	p_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_PROD_INDEX);
+	txq_stopped = netif_tx_queue_stopped(txq);
+	free_bds = ring->free_bds;
+	spin_unlock_irqrestore(&ring->lock, flags);
+
+	netif_err(priv, tx_err, priv->dev, "Ring %d queue %d status summary\n"
+		  "TX queue status: %s, interrupts: %s\n"
+		  "(sw)free_bds: %d (sw)size: %d\n"
+		  "(sw)p_index: %d (hw)p_index: %d\n"
+		  "(sw)c_index: %d (hw)c_index: %d\n"
+		  "(sw)clean_p: %d (sw)write_p: %d\n"
+		  "(sw)cb_ptr: %d (sw)end_ptr: %d\n",
+		  ring->index, ring->queue,
+		  txq_stopped ? "stopped" : "active",
+		  intsts & intmsk ? "enabled" : "disabled",
+		  free_bds, ring->size,
+		  ring->prod_index, p_index & DMA_P_INDEX_MASK,
+		  ring->c_index, c_index & DMA_C_INDEX_MASK,
+		  ring->clean_ptr, ring->write_ptr,
+		  ring->cb_ptr, ring->end_ptr);
+}
+
 static void bcmgenet_timeout(struct net_device *dev)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
+	u32 int0_enable = 0;
+	u32 int1_enable = 0;
+	unsigned int q;
 
 	netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n");
 
+	for (q = 0; q < priv->hw_params->tx_queues; q++)
+		bcmgenet_dump_tx_queue(&priv->tx_rings[q]);
+	bcmgenet_dump_tx_queue(&priv->tx_rings[DESC_INDEX]);
+
+	bcmgenet_tx_reclaim_all(dev);
+
+	for (q = 0; q < priv->hw_params->tx_queues; q++)
+		int1_enable |= (1 << q);
+
+	int0_enable = UMAC_IRQ_TXDMA_DONE;
+
+	/* Re-enable TX interrupts if disabled */
+	bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
+	bcmgenet_intrl2_1_writel(priv, int1_enable, INTRL2_CPU_MASK_CLEAR);
+
 	dev->trans_start = jiffies;
 
 	dev->stats.tx_errors++;