From e112373fd6aa280bd2cbc0d5cc3809115325a1be Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Mon, 14 Jul 2008 23:48:52 -0700 Subject: [PATCH] IPoIB/cm: Reduce connected mode TX object size Since IPoIB connected mode does not NETIF_F_SG, we only have one DMA mapping per send, so we don't need a mapping[] array. Define a new struct with a single u64 mapping member and use it for the CM tx_ring. Signed-off-by: Eli Cohen Signed-off-by: Roland Dreier --- drivers/infiniband/ulp/ipoib/ipoib.h | 7 ++++++- drivers/infiniband/ulp/ipoib/ipoib_cm.c | 12 ++++++------ 2 files changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h index a89b9fbe1ef4..0281c8fecc90 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib.h +++ b/drivers/infiniband/ulp/ipoib/ipoib.h @@ -157,6 +157,11 @@ struct ipoib_tx_buf { u64 mapping[MAX_SKB_FRAGS + 1]; }; +struct ipoib_cm_tx_buf { + struct sk_buff *skb; + u64 mapping; +}; + struct ib_cm_id; struct ipoib_cm_data { @@ -215,7 +220,7 @@ struct ipoib_cm_tx { struct net_device *dev; struct ipoib_neigh *neigh; struct ipoib_path *path; - struct ipoib_tx_buf *tx_ring; + struct ipoib_cm_tx_buf *tx_ring; unsigned tx_head; unsigned tx_tail; unsigned long flags; diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c index 87f9f3ef3b2d..0f2d3045061a 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c @@ -703,7 +703,7 @@ static inline int post_send(struct ipoib_dev_priv *priv, 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_tx_buf *tx_req; + struct ipoib_cm_tx_buf *tx_req; u64 addr; if (unlikely(skb->len > tx->mtu)) { @@ -734,7 +734,7 @@ void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_ return; } - tx_req->mapping[0] = addr; + tx_req->mapping = addr; if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), addr, skb->len))) { @@ -759,7 +759,7 @@ 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_tx_buf *tx_req; + struct ipoib_cm_tx_buf *tx_req; unsigned long flags; ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", @@ -773,7 +773,7 @@ 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[0], tx_req->skb->len, DMA_TO_DEVICE); + ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE); /* FIXME: is this right? Shouldn't we only increment on success? */ ++dev->stats.tx_packets; @@ -1143,7 +1143,7 @@ err_tx: static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) { struct ipoib_dev_priv *priv = netdev_priv(p->dev); - struct ipoib_tx_buf *tx_req; + struct ipoib_cm_tx_buf *tx_req; unsigned long flags; unsigned long begin; @@ -1171,7 +1171,7 @@ 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[0], tx_req->skb->len, + ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(tx_req->skb); ++p->tx_tail; -- 2.30.2