From db21733488f84a596faaad0d05430b3f51804692 Mon Sep 17 00:00:00 2001 From: Chris Leech Date: Sat, 17 Jun 2006 21:24:58 -0700 Subject: [I/OAT]: Setup the networking subsystem as a DMA client Attempts to allocate per-CPU DMA channels Signed-off-by: Chris Leech Signed-off-by: David S. Miller --- include/net/netdma.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 include/net/netdma.h (limited to 'include/net/netdma.h') diff --git a/include/net/netdma.h b/include/net/netdma.h new file mode 100644 index 000000000000..cbfe89d7e5d0 --- /dev/null +++ b/include/net/netdma.h @@ -0,0 +1,38 @@ +/* + * 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 +#include +#ifdef CONFIG_NET_DMA +#include + +static inline struct dma_chan *get_softnet_dma(void) +{ + struct dma_chan *chan; + rcu_read_lock(); + chan = rcu_dereference(__get_cpu_var(softnet_data.net_dma)); + if (chan) + dma_chan_get(chan); + rcu_read_unlock(); + return chan; +} +#endif /* CONFIG_NET_DMA */ +#endif /* NETDMA_H */ -- cgit v1.2.3