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authorChris Leech <christopher.leech@intel.com>2006-06-17 21:24:58 -0700
committerDavid S. Miller <davem@davemloft.net>2006-06-17 21:24:58 -0700
commitdb21733488f84a596faaad0d05430b3f51804692 (patch)
treea2c1f6d39ce27d2e86b395f2bf536c1ab7396411 /include/net/netdma.h
parent57c651f74cd8383df10a648e677902849de1bc0b (diff)
downloadop-kernel-dev-db21733488f84a596faaad0d05430b3f51804692.zip
op-kernel-dev-db21733488f84a596faaad0d05430b3f51804692.tar.gz
[I/OAT]: Setup the networking subsystem as a DMA client
Attempts to allocate per-CPU DMA channels Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netdma.h')
-rw-r--r--include/net/netdma.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/net/netdma.h b/include/net/netdma.h
new file mode 100644
index 0000000..cbfe89d
--- /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 <linux/config.h>
+#ifdef CONFIG_NET_DMA
+#include <linux/dmaengine.h>
+
+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 */
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