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include/net/netdma.h 1.42 KB
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  /*
   * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License as published by the Free
   * Software Foundation; either version 2 of the License, or (at your option)
   * any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc., 59
   * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
   *
   * The full GNU General Public License is included in this distribution in the
   * file called COPYING.
   */
  #ifndef NETDMA_H
  #define NETDMA_H
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  #ifdef CONFIG_NET_DMA
  #include <linux/dmaengine.h>
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  #include <linux/skbuff.h>
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  static inline struct dma_chan *get_softnet_dma(void)
  {
  	struct dma_chan *chan;
  	rcu_read_lock();
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  	chan = rcu_dereference(__get_cpu_var(softnet_data).net_dma);
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  	if (chan)
  		dma_chan_get(chan);
  	rcu_read_unlock();
  	return chan;
  }
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  int dma_skb_copy_datagram_iovec(struct dma_chan* chan,
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  		struct sk_buff *skb, int offset, struct iovec *to,
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  		size_t len, struct dma_pinned_list *pinned_list);
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  #endif /* CONFIG_NET_DMA */
  #endif /* NETDMA_H */