These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 18 insertions, 23 deletions

diff --git a/kernel/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/kernel/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index cf32a778e..3ae9726ef 100644
--- a/kernel/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/kernel/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -332,7 +332,7 @@ static void ipoib_cm_init_rx_wr(struct net_device *dev,
 	int i;
 
 	for (i = 0; i < priv->cm.num_frags; ++i)
-		sge[i].lkey = priv->mr->lkey;
+		sge[i].lkey = priv->pd->local_dma_lkey;
 
 	sge[0].length = IPOIB_CM_HEAD_SIZE;
 	for (i = 1; i < priv->cm.num_frags; ++i)
@@ -694,24 +694,21 @@ repost:
 static inline int post_send(struct ipoib_dev_priv *priv,
 			    struct ipoib_cm_tx *tx,
 			    unsigned int wr_id,
-			    u64 addr, int len)
+			    struct ipoib_tx_buf *tx_req)
 {
 	struct ib_send_wr *bad_wr;
 
-	priv->tx_sge[0].addr          = addr;
-	priv->tx_sge[0].length        = len;
+	ipoib_build_sge(priv, tx_req);
 
-	priv->tx_wr.num_sge	= 1;
-	priv->tx_wr.wr_id	= wr_id | IPOIB_OP_CM;
+	priv->tx_wr.wr.wr_id	= wr_id | IPOIB_OP_CM;
 
-	return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr);
+	return ib_post_send(tx->qp, &priv->tx_wr.wr, &bad_wr);
 }
 
 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
-	struct ipoib_cm_tx_buf *tx_req;
-	u64 addr;
+	struct ipoib_tx_buf *tx_req;
 	int rc;
 
 	if (unlikely(skb->len > tx->mtu)) {
@@ -735,24 +732,21 @@ void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_
 	 */
 	tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)];
 	tx_req->skb = skb;
-	addr = ib_dma_map_single(priv->ca, skb->data, skb->len, DMA_TO_DEVICE);
-	if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
+
+	if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
 		++dev->stats.tx_errors;
 		dev_kfree_skb_any(skb);
 		return;
 	}
 
-	tx_req->mapping = addr;
-
 	skb_orphan(skb);
 	skb_dst_drop(skb);
 
-	rc = post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1),
-		       addr, skb->len);
+	rc = post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), tx_req);
 	if (unlikely(rc)) {
 		ipoib_warn(priv, "post_send failed, error %d\n", rc);
 		++dev->stats.tx_errors;
-		ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE);
+		ipoib_dma_unmap_tx(priv, tx_req);
 		dev_kfree_skb_any(skb);
 	} else {
 		dev->trans_start = jiffies;
@@ -777,7 +771,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	struct ipoib_cm_tx *tx = wc->qp->qp_context;
 	unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM;
-	struct ipoib_cm_tx_buf *tx_req;
+	struct ipoib_tx_buf *tx_req;
 	unsigned long flags;
 
 	ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n",
@@ -791,7 +785,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
 
 	tx_req = &tx->tx_ring[wr_id];
 
-	ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE);
+	ipoib_dma_unmap_tx(priv, tx_req);
 
 	/* FIXME: is this right? Shouldn't we only increment on success? */
 	++dev->stats.tx_packets;
@@ -854,7 +848,7 @@ int ipoib_cm_dev_open(struct net_device *dev)
 	}
 
 	ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num),
-			   0, NULL);
+			   0);
 	if (ret) {
 		printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name,
 		       IPOIB_CM_IETF_ID | priv->qp->qp_num);
@@ -1036,6 +1030,9 @@ static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ipoib_
 
 	struct ib_qp *tx_qp;
 
+	if (dev->features & NETIF_F_SG)
+		attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
+
 	tx_qp = ib_create_qp(priv->pd, &attr);
 	if (PTR_ERR(tx_qp) == -EINVAL) {
 		ipoib_warn(priv, "can't use GFP_NOIO for QPs on device %s, using GFP_KERNEL\n",
@@ -1170,7 +1167,7 @@ err_tx:
 static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(p->dev);
-	struct ipoib_cm_tx_buf *tx_req;
+	struct ipoib_tx_buf *tx_req;
 	unsigned long begin;
 
 	ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n",
@@ -1197,8 +1194,7 @@ timeout:
 
 	while ((int) p->tx_tail - (int) p->tx_head < 0) {
 		tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)];
-		ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len,
-				    DMA_TO_DEVICE);
+		ipoib_dma_unmap_tx(priv, tx_req);
 		dev_kfree_skb_any(tx_req->skb);
 		++p->tx_tail;
 		netif_tx_lock_bh(p->dev);
@@ -1455,7 +1451,6 @@ static void ipoib_cm_stale_task(struct work_struct *work)
 	spin_unlock_irq(&priv->lock);
 }
 
-
 static ssize_t show_mode(struct device *d, struct device_attribute *attr,
 			 char *buf)
 {