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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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de5506e155
Provides for pinning user space pages in memory, copying to iovecs, and copying from sk_buffs including fragmented and chained sk_buffs. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
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* Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The full GNU General Public License is included in this distribution in the
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* file called COPYING.
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*/
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#ifndef NETDMA_H
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#define NETDMA_H
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#include <linux/config.h>
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#ifdef CONFIG_NET_DMA
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#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)
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{
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struct dma_chan *chan;
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rcu_read_lock();
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chan = rcu_dereference(__get_cpu_var(softnet_data.net_dma));
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if (chan)
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dma_chan_get(chan);
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rcu_read_unlock();
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return chan;
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}
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int dma_skb_copy_datagram_iovec(struct dma_chan* chan,
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const 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 */
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#endif /* NETDMA_H */
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