forked from luck/tmp_suning_uos_patched
IPoIB: Refactor completion handling
Split up ipoib_ib_handle_wc() into ipoib_ib_handle_rx_wc() and ipoib_ib_handle_tx_wc() to make the code easier to read. This will also help implement NAPI in the future. Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier
parent
d81110285f
commit
2439a6e65f
@ -169,117 +169,129 @@ static int ipoib_ib_post_receives(struct net_device *dev)
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return 0;
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}
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static void ipoib_ib_handle_wc(struct net_device *dev,
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struct ib_wc *wc)
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static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
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struct sk_buff *skb;
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dma_addr_t addr;
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ipoib_dbg_data(priv, "recv completion: id %d, op %d, status: %d\n",
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wr_id, wc->opcode, wc->status);
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if (unlikely(wr_id >= ipoib_recvq_size)) {
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ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
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wr_id, ipoib_recvq_size);
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return;
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}
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skb = priv->rx_ring[wr_id].skb;
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addr = priv->rx_ring[wr_id].mapping;
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if (unlikely(wc->status != IB_WC_SUCCESS)) {
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if (wc->status != IB_WC_WR_FLUSH_ERR)
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ipoib_warn(priv, "failed recv event "
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"(status=%d, wrid=%d vend_err %x)\n",
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wc->status, wr_id, wc->vendor_err);
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dma_unmap_single(priv->ca->dma_device, addr,
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IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
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dev_kfree_skb_any(skb);
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priv->rx_ring[wr_id].skb = NULL;
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return;
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}
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/*
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* If we can't allocate a new RX buffer, dump
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* this packet and reuse the old buffer.
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*/
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if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) {
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++priv->stats.rx_dropped;
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goto repost;
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}
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ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
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wc->byte_len, wc->slid);
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dma_unmap_single(priv->ca->dma_device, addr,
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IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
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skb_put(skb, wc->byte_len);
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skb_pull(skb, IB_GRH_BYTES);
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if (wc->slid != priv->local_lid ||
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wc->src_qp != priv->qp->qp_num) {
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skb->protocol = ((struct ipoib_header *) skb->data)->proto;
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skb->mac.raw = skb->data;
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skb_pull(skb, IPOIB_ENCAP_LEN);
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dev->last_rx = jiffies;
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++priv->stats.rx_packets;
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priv->stats.rx_bytes += skb->len;
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skb->dev = dev;
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/* XXX get correct PACKET_ type here */
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skb->pkt_type = PACKET_HOST;
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netif_rx_ni(skb);
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} else {
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ipoib_dbg_data(priv, "dropping loopback packet\n");
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dev_kfree_skb_any(skb);
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}
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repost:
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if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
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ipoib_warn(priv, "ipoib_ib_post_receive failed "
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"for buf %d\n", wr_id);
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}
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static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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unsigned int wr_id = wc->wr_id;
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struct ipoib_tx_buf *tx_req;
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unsigned long flags;
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ipoib_dbg_data(priv, "called: id %d, op %d, status: %d\n",
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ipoib_dbg_data(priv, "send completion: id %d, op %d, status: %d\n",
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wr_id, wc->opcode, wc->status);
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if (wr_id & IPOIB_OP_RECV) {
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wr_id &= ~IPOIB_OP_RECV;
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if (wr_id < ipoib_recvq_size) {
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struct sk_buff *skb = priv->rx_ring[wr_id].skb;
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dma_addr_t addr = priv->rx_ring[wr_id].mapping;
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if (unlikely(wc->status != IB_WC_SUCCESS)) {
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if (wc->status != IB_WC_WR_FLUSH_ERR)
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ipoib_warn(priv, "failed recv event "
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"(status=%d, wrid=%d vend_err %x)\n",
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wc->status, wr_id, wc->vendor_err);
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dma_unmap_single(priv->ca->dma_device, addr,
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IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
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dev_kfree_skb_any(skb);
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priv->rx_ring[wr_id].skb = NULL;
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return;
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}
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/*
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* If we can't allocate a new RX buffer, dump
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* this packet and reuse the old buffer.
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*/
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if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) {
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++priv->stats.rx_dropped;
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goto repost;
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}
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ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
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wc->byte_len, wc->slid);
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dma_unmap_single(priv->ca->dma_device, addr,
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IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
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skb_put(skb, wc->byte_len);
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skb_pull(skb, IB_GRH_BYTES);
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if (wc->slid != priv->local_lid ||
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wc->src_qp != priv->qp->qp_num) {
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skb->protocol = ((struct ipoib_header *) skb->data)->proto;
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skb->mac.raw = skb->data;
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skb_pull(skb, IPOIB_ENCAP_LEN);
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dev->last_rx = jiffies;
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++priv->stats.rx_packets;
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priv->stats.rx_bytes += skb->len;
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skb->dev = dev;
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/* XXX get correct PACKET_ type here */
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skb->pkt_type = PACKET_HOST;
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netif_rx_ni(skb);
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} else {
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ipoib_dbg_data(priv, "dropping loopback packet\n");
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dev_kfree_skb_any(skb);
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}
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repost:
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if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
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ipoib_warn(priv, "ipoib_ib_post_receive failed "
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"for buf %d\n", wr_id);
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} else
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ipoib_warn(priv, "completion event with wrid %d\n",
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wr_id);
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} else {
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struct ipoib_tx_buf *tx_req;
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unsigned long flags;
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if (wr_id >= ipoib_sendq_size) {
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ipoib_warn(priv, "completion event with wrid %d (> %d)\n",
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wr_id, ipoib_sendq_size);
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return;
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}
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ipoib_dbg_data(priv, "send complete, wrid %d\n", wr_id);
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tx_req = &priv->tx_ring[wr_id];
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dma_unmap_single(priv->ca->dma_device,
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pci_unmap_addr(tx_req, mapping),
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tx_req->skb->len,
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DMA_TO_DEVICE);
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++priv->stats.tx_packets;
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priv->stats.tx_bytes += tx_req->skb->len;
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dev_kfree_skb_any(tx_req->skb);
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spin_lock_irqsave(&priv->tx_lock, flags);
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++priv->tx_tail;
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if (netif_queue_stopped(dev) &&
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test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags) &&
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priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1)
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netif_wake_queue(dev);
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spin_unlock_irqrestore(&priv->tx_lock, flags);
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if (wc->status != IB_WC_SUCCESS &&
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wc->status != IB_WC_WR_FLUSH_ERR)
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ipoib_warn(priv, "failed send event "
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"(status=%d, wrid=%d vend_err %x)\n",
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wc->status, wr_id, wc->vendor_err);
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if (unlikely(wr_id >= ipoib_sendq_size)) {
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ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
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wr_id, ipoib_sendq_size);
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return;
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}
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tx_req = &priv->tx_ring[wr_id];
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dma_unmap_single(priv->ca->dma_device,
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pci_unmap_addr(tx_req, mapping),
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tx_req->skb->len,
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DMA_TO_DEVICE);
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++priv->stats.tx_packets;
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priv->stats.tx_bytes += tx_req->skb->len;
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dev_kfree_skb_any(tx_req->skb);
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spin_lock_irqsave(&priv->tx_lock, flags);
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++priv->tx_tail;
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if (netif_queue_stopped(dev) &&
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test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags) &&
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priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1)
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netif_wake_queue(dev);
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spin_unlock_irqrestore(&priv->tx_lock, flags);
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if (wc->status != IB_WC_SUCCESS &&
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wc->status != IB_WC_WR_FLUSH_ERR)
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ipoib_warn(priv, "failed send event "
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"(status=%d, wrid=%d vend_err %x)\n",
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wc->status, wr_id, wc->vendor_err);
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}
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static void ipoib_ib_handle_wc(struct net_device *dev, struct ib_wc *wc)
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{
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if (wc->wr_id & IPOIB_OP_RECV)
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ipoib_ib_handle_rx_wc(dev, wc);
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else
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ipoib_ib_handle_tx_wc(dev, wc);
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}
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void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
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