mirror of https://gitee.com/openkylin/linux.git
1075 lines
27 KiB
C
1075 lines
27 KiB
C
/*
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* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <rdma/ib_cache.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include "ipoib.h"
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#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
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static int data_debug_level;
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module_param(data_debug_level, int, 0644);
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MODULE_PARM_DESC(data_debug_level,
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"Enable data path debug tracing if > 0");
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#endif
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static DEFINE_MUTEX(pkey_mutex);
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struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
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struct ib_pd *pd, struct ib_ah_attr *attr)
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{
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struct ipoib_ah *ah;
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ah = kmalloc(sizeof *ah, GFP_KERNEL);
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if (!ah)
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return NULL;
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ah->dev = dev;
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ah->last_send = 0;
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kref_init(&ah->ref);
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ah->ah = ib_create_ah(pd, attr);
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if (IS_ERR(ah->ah)) {
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kfree(ah);
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ah = NULL;
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} else
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ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah);
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return ah;
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}
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void ipoib_free_ah(struct kref *kref)
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{
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struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
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struct ipoib_dev_priv *priv = netdev_priv(ah->dev);
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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list_add_tail(&ah->list, &priv->dead_ahs);
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spin_unlock_irqrestore(&priv->lock, flags);
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}
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static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
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u64 mapping[IPOIB_UD_RX_SG])
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{
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if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
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ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_UD_HEAD_SIZE,
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DMA_FROM_DEVICE);
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ib_dma_unmap_page(priv->ca, mapping[1], PAGE_SIZE,
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DMA_FROM_DEVICE);
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} else
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ib_dma_unmap_single(priv->ca, mapping[0],
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IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
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DMA_FROM_DEVICE);
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}
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static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv,
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struct sk_buff *skb,
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unsigned int length)
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{
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if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
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skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
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unsigned int size;
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/*
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* There is only two buffers needed for max_payload = 4K,
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* first buf size is IPOIB_UD_HEAD_SIZE
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*/
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skb->tail += IPOIB_UD_HEAD_SIZE;
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skb->len += length;
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size = length - IPOIB_UD_HEAD_SIZE;
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frag->size = size;
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skb->data_len += size;
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skb->truesize += size;
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} else
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skb_put(skb, length);
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}
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static int ipoib_ib_post_receive(struct net_device *dev, int id)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct ib_recv_wr *bad_wr;
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int ret;
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priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
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priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0];
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priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1];
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ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
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if (unlikely(ret)) {
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ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
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ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping);
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dev_kfree_skb_any(priv->rx_ring[id].skb);
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priv->rx_ring[id].skb = NULL;
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}
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return ret;
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}
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static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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struct sk_buff *skb;
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int buf_size;
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u64 *mapping;
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if (ipoib_ud_need_sg(priv->max_ib_mtu))
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buf_size = IPOIB_UD_HEAD_SIZE;
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else
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buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
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skb = dev_alloc_skb(buf_size + 4);
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if (unlikely(!skb))
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return NULL;
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/*
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* IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
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* header. So we need 4 more bytes to get to 48 and align the
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* IP header to a multiple of 16.
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*/
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skb_reserve(skb, 4);
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mapping = priv->rx_ring[id].mapping;
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mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size,
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DMA_FROM_DEVICE);
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if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0])))
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goto error;
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if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
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struct page *page = alloc_page(GFP_ATOMIC);
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if (!page)
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goto partial_error;
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skb_fill_page_desc(skb, 0, page, 0, PAGE_SIZE);
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mapping[1] =
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ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[0].page,
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0, PAGE_SIZE, DMA_FROM_DEVICE);
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if (unlikely(ib_dma_mapping_error(priv->ca, mapping[1])))
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goto partial_error;
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}
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priv->rx_ring[id].skb = skb;
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return skb;
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partial_error:
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ib_dma_unmap_single(priv->ca, mapping[0], buf_size, DMA_FROM_DEVICE);
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error:
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dev_kfree_skb_any(skb);
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return NULL;
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}
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static int ipoib_ib_post_receives(struct net_device *dev)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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int i;
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for (i = 0; i < ipoib_recvq_size; ++i) {
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if (!ipoib_alloc_rx_skb(dev, i)) {
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ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
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return -ENOMEM;
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}
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if (ipoib_ib_post_receive(dev, i)) {
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ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
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return -EIO;
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}
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}
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return 0;
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}
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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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u64 mapping[IPOIB_UD_RX_SG];
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ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
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wr_id, 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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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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ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping);
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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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* Drop packets that this interface sent, ie multicast packets
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* that the HCA has replicated.
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*/
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if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
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goto repost;
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memcpy(mapping, priv->rx_ring[wr_id].mapping,
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IPOIB_UD_RX_SG * sizeof *mapping);
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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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++dev->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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ipoib_ud_dma_unmap_rx(priv, mapping);
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ipoib_ud_skb_put_frags(priv, skb, wc->byte_len);
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skb_pull(skb, IB_GRH_BYTES);
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skb->protocol = ((struct ipoib_header *) skb->data)->proto;
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skb_reset_mac_header(skb);
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skb_pull(skb, IPOIB_ENCAP_LEN);
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dev->last_rx = jiffies;
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++dev->stats.rx_packets;
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dev->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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if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
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skb->ip_summed = CHECKSUM_UNNECESSARY;
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if (dev->features & NETIF_F_LRO)
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lro_receive_skb(&priv->lro.lro_mgr, skb, NULL);
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else
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netif_receive_skb(skb);
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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 int ipoib_dma_map_tx(struct ib_device *ca,
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struct ipoib_tx_buf *tx_req)
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{
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struct sk_buff *skb = tx_req->skb;
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u64 *mapping = tx_req->mapping;
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int i;
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int off;
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if (skb_headlen(skb)) {
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mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
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DMA_TO_DEVICE);
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if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
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return -EIO;
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off = 1;
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} else
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off = 0;
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for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
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skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
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mapping[i + off] = ib_dma_map_page(ca, frag->page,
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frag->page_offset, frag->size,
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DMA_TO_DEVICE);
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if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
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goto partial_error;
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}
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return 0;
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partial_error:
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for (; i > 0; --i) {
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skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
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ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE);
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}
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if (off)
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ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
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return -EIO;
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}
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static void ipoib_dma_unmap_tx(struct ib_device *ca,
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struct ipoib_tx_buf *tx_req)
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{
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struct sk_buff *skb = tx_req->skb;
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u64 *mapping = tx_req->mapping;
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int i;
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int off;
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if (skb_headlen(skb)) {
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ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
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off = 1;
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} else
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off = 0;
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for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
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skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
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ib_dma_unmap_page(ca, mapping[i + off], frag->size,
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DMA_TO_DEVICE);
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}
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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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ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
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wr_id, wc->status);
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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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ipoib_dma_unmap_tx(priv->ca, tx_req);
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++dev->stats.tx_packets;
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dev->stats.tx_bytes += tx_req->skb->len;
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dev_kfree_skb_any(tx_req->skb);
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++priv->tx_tail;
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if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
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netif_queue_stopped(dev) &&
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test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
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netif_wake_queue(dev);
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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 int poll_tx(struct ipoib_dev_priv *priv)
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{
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int n, i;
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n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
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for (i = 0; i < n; ++i)
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ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i);
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return n == MAX_SEND_CQE;
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}
|
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|
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int ipoib_poll(struct napi_struct *napi, int budget)
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{
|
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struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
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struct net_device *dev = priv->dev;
|
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int done;
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int t;
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int n, i;
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done = 0;
|
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|
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poll_more:
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while (done < budget) {
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int max = (budget - done);
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|
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t = min(IPOIB_NUM_WC, max);
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n = ib_poll_cq(priv->recv_cq, t, priv->ibwc);
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for (i = 0; i < n; i++) {
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struct ib_wc *wc = priv->ibwc + i;
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|
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if (wc->wr_id & IPOIB_OP_RECV) {
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++done;
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if (wc->wr_id & IPOIB_OP_CM)
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ipoib_cm_handle_rx_wc(dev, wc);
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else
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ipoib_ib_handle_rx_wc(dev, wc);
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} else
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ipoib_cm_handle_tx_wc(priv->dev, wc);
|
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}
|
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|
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if (n != t)
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break;
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}
|
|
|
|
if (done < budget) {
|
|
if (dev->features & NETIF_F_LRO)
|
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lro_flush_all(&priv->lro.lro_mgr);
|
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|
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netif_rx_complete(dev, napi);
|
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if (unlikely(ib_req_notify_cq(priv->recv_cq,
|
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IB_CQ_NEXT_COMP |
|
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IB_CQ_REPORT_MISSED_EVENTS)) &&
|
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netif_rx_reschedule(dev, napi))
|
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goto poll_more;
|
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}
|
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|
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return done;
|
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}
|
|
|
|
void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
|
|
{
|
|
struct net_device *dev = dev_ptr;
|
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struct ipoib_dev_priv *priv = netdev_priv(dev);
|
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|
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netif_rx_schedule(dev, &priv->napi);
|
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}
|
|
|
|
static void drain_tx_cq(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
netif_tx_lock(dev);
|
|
while (poll_tx(priv))
|
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; /* nothing */
|
|
|
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if (netif_queue_stopped(dev))
|
|
mod_timer(&priv->poll_timer, jiffies + 1);
|
|
|
|
netif_tx_unlock(dev);
|
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}
|
|
|
|
void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev_ptr);
|
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|
|
mod_timer(&priv->poll_timer, jiffies);
|
|
}
|
|
|
|
static inline int post_send(struct ipoib_dev_priv *priv,
|
|
unsigned int wr_id,
|
|
struct ib_ah *address, u32 qpn,
|
|
struct ipoib_tx_buf *tx_req,
|
|
void *head, int hlen)
|
|
{
|
|
struct ib_send_wr *bad_wr;
|
|
int i, off;
|
|
struct sk_buff *skb = tx_req->skb;
|
|
skb_frag_t *frags = skb_shinfo(skb)->frags;
|
|
int nr_frags = skb_shinfo(skb)->nr_frags;
|
|
u64 *mapping = tx_req->mapping;
|
|
|
|
if (skb_headlen(skb)) {
|
|
priv->tx_sge[0].addr = mapping[0];
|
|
priv->tx_sge[0].length = skb_headlen(skb);
|
|
off = 1;
|
|
} else
|
|
off = 0;
|
|
|
|
for (i = 0; i < nr_frags; ++i) {
|
|
priv->tx_sge[i + off].addr = mapping[i + off];
|
|
priv->tx_sge[i + off].length = frags[i].size;
|
|
}
|
|
priv->tx_wr.num_sge = nr_frags + off;
|
|
priv->tx_wr.wr_id = wr_id;
|
|
priv->tx_wr.wr.ud.remote_qpn = qpn;
|
|
priv->tx_wr.wr.ud.ah = address;
|
|
|
|
if (head) {
|
|
priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size;
|
|
priv->tx_wr.wr.ud.header = head;
|
|
priv->tx_wr.wr.ud.hlen = hlen;
|
|
priv->tx_wr.opcode = IB_WR_LSO;
|
|
} else
|
|
priv->tx_wr.opcode = IB_WR_SEND;
|
|
|
|
return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
|
|
}
|
|
|
|
void ipoib_send(struct net_device *dev, struct sk_buff *skb,
|
|
struct ipoib_ah *address, u32 qpn)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_tx_buf *tx_req;
|
|
int hlen;
|
|
void *phead;
|
|
|
|
if (skb_is_gso(skb)) {
|
|
hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
|
|
phead = skb->data;
|
|
if (unlikely(!skb_pull(skb, hlen))) {
|
|
ipoib_warn(priv, "linear data too small\n");
|
|
++dev->stats.tx_dropped;
|
|
++dev->stats.tx_errors;
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
} else {
|
|
if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
|
|
ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
|
|
skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
|
|
++dev->stats.tx_dropped;
|
|
++dev->stats.tx_errors;
|
|
ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
|
|
return;
|
|
}
|
|
phead = NULL;
|
|
hlen = 0;
|
|
}
|
|
|
|
ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
|
|
skb->len, address, qpn);
|
|
|
|
/*
|
|
* We put the skb into the tx_ring _before_ we call post_send()
|
|
* because it's entirely possible that the completion handler will
|
|
* run before we execute anything after the post_send(). That
|
|
* means we have to make sure everything is properly recorded and
|
|
* our state is consistent before we call post_send().
|
|
*/
|
|
tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
|
|
tx_req->skb = skb;
|
|
if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
|
|
++dev->stats.tx_errors;
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL)
|
|
priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
|
|
else
|
|
priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
|
|
|
|
if (++priv->tx_outstanding == ipoib_sendq_size) {
|
|
ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
|
|
if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
|
|
ipoib_warn(priv, "request notify on send CQ failed\n");
|
|
netif_stop_queue(dev);
|
|
}
|
|
|
|
if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
|
|
address->ah, qpn, tx_req, phead, hlen))) {
|
|
ipoib_warn(priv, "post_send failed\n");
|
|
++dev->stats.tx_errors;
|
|
--priv->tx_outstanding;
|
|
ipoib_dma_unmap_tx(priv->ca, tx_req);
|
|
dev_kfree_skb_any(skb);
|
|
if (netif_queue_stopped(dev))
|
|
netif_wake_queue(dev);
|
|
} else {
|
|
dev->trans_start = jiffies;
|
|
|
|
address->last_send = priv->tx_head;
|
|
++priv->tx_head;
|
|
skb_orphan(skb);
|
|
|
|
}
|
|
|
|
if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
|
|
while (poll_tx(priv))
|
|
; /* nothing */
|
|
}
|
|
|
|
static void __ipoib_reap_ah(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ipoib_ah *ah, *tah;
|
|
LIST_HEAD(remove_list);
|
|
unsigned long flags;
|
|
|
|
netif_tx_lock_bh(dev);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
|
|
if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
|
|
list_del(&ah->list);
|
|
ib_destroy_ah(ah->ah);
|
|
kfree(ah);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
netif_tx_unlock_bh(dev);
|
|
}
|
|
|
|
void ipoib_reap_ah(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
|
|
struct net_device *dev = priv->dev;
|
|
|
|
__ipoib_reap_ah(dev);
|
|
|
|
if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
|
|
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
|
|
round_jiffies_relative(HZ));
|
|
}
|
|
|
|
static void ipoib_ib_tx_timer_func(unsigned long ctx)
|
|
{
|
|
drain_tx_cq((struct net_device *)ctx);
|
|
}
|
|
|
|
int ipoib_ib_dev_open(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
int ret;
|
|
|
|
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
|
|
ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
|
|
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
|
|
return -1;
|
|
}
|
|
set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
|
|
|
|
ret = ipoib_init_qp(dev);
|
|
if (ret) {
|
|
ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
|
|
return -1;
|
|
}
|
|
|
|
ret = ipoib_ib_post_receives(dev);
|
|
if (ret) {
|
|
ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
|
|
ipoib_ib_dev_stop(dev, 1);
|
|
return -1;
|
|
}
|
|
|
|
ret = ipoib_cm_dev_open(dev);
|
|
if (ret) {
|
|
ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
|
|
ipoib_ib_dev_stop(dev, 1);
|
|
return -1;
|
|
}
|
|
|
|
clear_bit(IPOIB_STOP_REAPER, &priv->flags);
|
|
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
|
|
round_jiffies_relative(HZ));
|
|
|
|
set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipoib_pkey_dev_check_presence(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
u16 pkey_index = 0;
|
|
|
|
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
|
|
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
|
|
else
|
|
set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
|
|
}
|
|
|
|
int ipoib_ib_dev_up(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
ipoib_pkey_dev_check_presence(dev);
|
|
|
|
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
|
|
ipoib_dbg(priv, "PKEY is not assigned.\n");
|
|
return 0;
|
|
}
|
|
|
|
set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
|
|
|
|
return ipoib_mcast_start_thread(dev);
|
|
}
|
|
|
|
int ipoib_ib_dev_down(struct net_device *dev, int flush)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
ipoib_dbg(priv, "downing ib_dev\n");
|
|
|
|
clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
|
|
netif_carrier_off(dev);
|
|
|
|
/* Shutdown the P_Key thread if still active */
|
|
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
|
|
mutex_lock(&pkey_mutex);
|
|
set_bit(IPOIB_PKEY_STOP, &priv->flags);
|
|
cancel_delayed_work(&priv->pkey_poll_task);
|
|
mutex_unlock(&pkey_mutex);
|
|
if (flush)
|
|
flush_workqueue(ipoib_workqueue);
|
|
}
|
|
|
|
ipoib_mcast_stop_thread(dev, flush);
|
|
ipoib_mcast_dev_flush(dev);
|
|
|
|
ipoib_flush_paths(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int recvs_pending(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
int pending = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < ipoib_recvq_size; ++i)
|
|
if (priv->rx_ring[i].skb)
|
|
++pending;
|
|
|
|
return pending;
|
|
}
|
|
|
|
void ipoib_drain_cq(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
int i, n;
|
|
|
|
/*
|
|
* We call completion handling routines that expect to be
|
|
* called from the BH-disabled NAPI poll context, so disable
|
|
* BHs here too.
|
|
*/
|
|
local_bh_disable();
|
|
|
|
do {
|
|
n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
|
|
for (i = 0; i < n; ++i) {
|
|
/*
|
|
* Convert any successful completions to flush
|
|
* errors to avoid passing packets up the
|
|
* stack after bringing the device down.
|
|
*/
|
|
if (priv->ibwc[i].status == IB_WC_SUCCESS)
|
|
priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
|
|
|
|
if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
|
|
if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
|
|
ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
|
|
else
|
|
ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
|
|
} else
|
|
ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
|
|
}
|
|
} while (n == IPOIB_NUM_WC);
|
|
|
|
while (poll_tx(priv))
|
|
; /* nothing */
|
|
|
|
local_bh_enable();
|
|
}
|
|
|
|
int ipoib_ib_dev_stop(struct net_device *dev, int flush)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
struct ib_qp_attr qp_attr;
|
|
unsigned long begin;
|
|
struct ipoib_tx_buf *tx_req;
|
|
int i;
|
|
|
|
clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
|
|
|
|
ipoib_cm_dev_stop(dev);
|
|
|
|
/*
|
|
* Move our QP to the error state and then reinitialize in
|
|
* when all work requests have completed or have been flushed.
|
|
*/
|
|
qp_attr.qp_state = IB_QPS_ERR;
|
|
if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
|
|
ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
|
|
|
|
/* Wait for all sends and receives to complete */
|
|
begin = jiffies;
|
|
|
|
while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
|
|
if (time_after(jiffies, begin + 5 * HZ)) {
|
|
ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
|
|
priv->tx_head - priv->tx_tail, recvs_pending(dev));
|
|
|
|
/*
|
|
* assume the HW is wedged and just free up
|
|
* all our pending work requests.
|
|
*/
|
|
while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
|
|
tx_req = &priv->tx_ring[priv->tx_tail &
|
|
(ipoib_sendq_size - 1)];
|
|
ipoib_dma_unmap_tx(priv->ca, tx_req);
|
|
dev_kfree_skb_any(tx_req->skb);
|
|
++priv->tx_tail;
|
|
--priv->tx_outstanding;
|
|
}
|
|
|
|
for (i = 0; i < ipoib_recvq_size; ++i) {
|
|
struct ipoib_rx_buf *rx_req;
|
|
|
|
rx_req = &priv->rx_ring[i];
|
|
if (!rx_req->skb)
|
|
continue;
|
|
ipoib_ud_dma_unmap_rx(priv,
|
|
priv->rx_ring[i].mapping);
|
|
dev_kfree_skb_any(rx_req->skb);
|
|
rx_req->skb = NULL;
|
|
}
|
|
|
|
goto timeout;
|
|
}
|
|
|
|
ipoib_drain_cq(dev);
|
|
|
|
msleep(1);
|
|
}
|
|
|
|
ipoib_dbg(priv, "All sends and receives done.\n");
|
|
|
|
timeout:
|
|
del_timer_sync(&priv->poll_timer);
|
|
qp_attr.qp_state = IB_QPS_RESET;
|
|
if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
|
|
ipoib_warn(priv, "Failed to modify QP to RESET state\n");
|
|
|
|
/* Wait for all AHs to be reaped */
|
|
set_bit(IPOIB_STOP_REAPER, &priv->flags);
|
|
cancel_delayed_work(&priv->ah_reap_task);
|
|
if (flush)
|
|
flush_workqueue(ipoib_workqueue);
|
|
|
|
begin = jiffies;
|
|
|
|
while (!list_empty(&priv->dead_ahs)) {
|
|
__ipoib_reap_ah(dev);
|
|
|
|
if (time_after(jiffies, begin + HZ)) {
|
|
ipoib_warn(priv, "timing out; will leak address handles\n");
|
|
break;
|
|
}
|
|
|
|
msleep(1);
|
|
}
|
|
|
|
ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
priv->ca = ca;
|
|
priv->port = port;
|
|
priv->qp = NULL;
|
|
|
|
if (ipoib_transport_dev_init(dev, ca)) {
|
|
printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func,
|
|
(unsigned long) dev);
|
|
|
|
if (dev->flags & IFF_UP) {
|
|
if (ipoib_ib_dev_open(dev)) {
|
|
ipoib_transport_dev_cleanup(dev);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
|
|
enum ipoib_flush_level level)
|
|
{
|
|
struct ipoib_dev_priv *cpriv;
|
|
struct net_device *dev = priv->dev;
|
|
u16 new_index;
|
|
|
|
mutex_lock(&priv->vlan_mutex);
|
|
|
|
/*
|
|
* Flush any child interfaces too -- they might be up even if
|
|
* the parent is down.
|
|
*/
|
|
list_for_each_entry(cpriv, &priv->child_intfs, list)
|
|
__ipoib_ib_dev_flush(cpriv, level);
|
|
|
|
mutex_unlock(&priv->vlan_mutex);
|
|
|
|
if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
|
|
ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
|
|
return;
|
|
}
|
|
|
|
if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
|
|
ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
|
|
return;
|
|
}
|
|
|
|
if (level == IPOIB_FLUSH_HEAVY) {
|
|
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
|
|
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
|
|
ipoib_ib_dev_down(dev, 0);
|
|
ipoib_ib_dev_stop(dev, 0);
|
|
if (ipoib_pkey_dev_delay_open(dev))
|
|
return;
|
|
}
|
|
|
|
/* restart QP only if P_Key index is changed */
|
|
if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
|
|
new_index == priv->pkey_index) {
|
|
ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
|
|
return;
|
|
}
|
|
priv->pkey_index = new_index;
|
|
}
|
|
|
|
if (level == IPOIB_FLUSH_LIGHT) {
|
|
ipoib_mark_paths_invalid(dev);
|
|
ipoib_mcast_dev_flush(dev);
|
|
}
|
|
|
|
if (level >= IPOIB_FLUSH_NORMAL)
|
|
ipoib_ib_dev_down(dev, 0);
|
|
|
|
if (level == IPOIB_FLUSH_HEAVY) {
|
|
ipoib_ib_dev_stop(dev, 0);
|
|
ipoib_ib_dev_open(dev);
|
|
}
|
|
|
|
/*
|
|
* The device could have been brought down between the start and when
|
|
* we get here, don't bring it back up if it's not configured up
|
|
*/
|
|
if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
|
|
if (level >= IPOIB_FLUSH_NORMAL)
|
|
ipoib_ib_dev_up(dev);
|
|
ipoib_mcast_restart_task(&priv->restart_task);
|
|
}
|
|
}
|
|
|
|
void ipoib_ib_dev_flush_light(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, flush_light);
|
|
|
|
__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT);
|
|
}
|
|
|
|
void ipoib_ib_dev_flush_normal(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, flush_normal);
|
|
|
|
__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL);
|
|
}
|
|
|
|
void ipoib_ib_dev_flush_heavy(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, flush_heavy);
|
|
|
|
__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY);
|
|
}
|
|
|
|
void ipoib_ib_dev_cleanup(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
ipoib_dbg(priv, "cleaning up ib_dev\n");
|
|
|
|
ipoib_mcast_stop_thread(dev, 1);
|
|
ipoib_mcast_dev_flush(dev);
|
|
|
|
ipoib_transport_dev_cleanup(dev);
|
|
}
|
|
|
|
/*
|
|
* Delayed P_Key Assigment Interim Support
|
|
*
|
|
* The following is initial implementation of delayed P_Key assigment
|
|
* mechanism. It is using the same approach implemented for the multicast
|
|
* group join. The single goal of this implementation is to quickly address
|
|
* Bug #2507. This implementation will probably be removed when the P_Key
|
|
* change async notification is available.
|
|
*/
|
|
|
|
void ipoib_pkey_poll(struct work_struct *work)
|
|
{
|
|
struct ipoib_dev_priv *priv =
|
|
container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
|
|
struct net_device *dev = priv->dev;
|
|
|
|
ipoib_pkey_dev_check_presence(dev);
|
|
|
|
if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
|
|
ipoib_open(dev);
|
|
else {
|
|
mutex_lock(&pkey_mutex);
|
|
if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
|
|
queue_delayed_work(ipoib_workqueue,
|
|
&priv->pkey_poll_task,
|
|
HZ);
|
|
mutex_unlock(&pkey_mutex);
|
|
}
|
|
}
|
|
|
|
int ipoib_pkey_dev_delay_open(struct net_device *dev)
|
|
{
|
|
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
|
|
|
/* Look for the interface pkey value in the IB Port P_Key table and */
|
|
/* set the interface pkey assigment flag */
|
|
ipoib_pkey_dev_check_presence(dev);
|
|
|
|
/* P_Key value not assigned yet - start polling */
|
|
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
|
|
mutex_lock(&pkey_mutex);
|
|
clear_bit(IPOIB_PKEY_STOP, &priv->flags);
|
|
queue_delayed_work(ipoib_workqueue,
|
|
&priv->pkey_poll_task,
|
|
HZ);
|
|
mutex_unlock(&pkey_mutex);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|