diff options
| author |   Chris Leech <christopher.leech@intel.com> | 2006-06-17 21:24:58 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2006-06-17 21:24:58 -0700 |
| commit | db21733488f84a596faaad0d05430b3f51804692 (patch) | |
| tree | a2c1f6d39ce27d2e86b395f2bf536c1ab7396411 /include | |
| parent | [I/OAT]: Move PCI_DEVICE_ID_INTEL_IOAT to linux/pci_ids.h (diff) | |
| download | linux-dev-db21733488f84a596faaad0d05430b3f51804692.tar.xz linux-dev-db21733488f84a596faaad0d05430b3f51804692.zip | |
[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')
| -rw-r--r-- | include/linux/netdevice.h | 4 | ||||
| -rw-r--r-- | include/net/netdma.h | 38 |
2 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index f4169bbb60eb..b5760c67af9c 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -37,6 +37,7 @@ #include <linux/config.h> #include <linux/device.h> #include <linux/percpu.h> +#include <linux/dmaengine.h> struct divert_blk; struct vlan_group; @@ -593,6 +594,9 @@ struct softnet_data struct sk_buff *completion_queue; struct net_device backlog_dev; /* Sorry. 8) */ +#ifdef CONFIG_NET_DMA + struct dma_chan *net_dma; +#endif }; DECLARE_PER_CPU(struct softnet_data,softnet_data); 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 <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 */ |