From: xiaohui.xin@intel.com
To: netdev@vger.kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu,
davem@davemloft.net, herbert@gondor.apana.org.au,
jdike@linux.intel.com
Cc: Xin Xiaohui <xiaohui.xin@intel.com>
Subject: [PATCH v14 12/17] Add header file for mp device.
Date: Thu, 4 Nov 2010 17:05:08 +0800 [thread overview]
Message-ID: <a93eb7ead682e2168f1c8cfa88e44ca7873dc4ef.1288860478.git.xiaohui.xin@intel.com> (raw)
In-Reply-To: <1288861513-5707-1-git-send-email-xiaohui.xin@intel.com>
In-Reply-To: <fc6e95d63a2c62aaf77f8ded22fc43ccefcdbbff.1288860477.git.xiaohui.xin@intel.com>
From: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Zhao Yu <yzhao81new@gmail.com>
Reviewed-by: Jeff Dike <jdike@linux.intel.com>
---
include/linux/mpassthru.h | 133 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 133 insertions(+), 0 deletions(-)
create mode 100644 include/linux/mpassthru.h
diff --git a/include/linux/mpassthru.h b/include/linux/mpassthru.h
new file mode 100644
index 0000000..1115f55
--- /dev/null
+++ b/include/linux/mpassthru.h
@@ -0,0 +1,133 @@
+#ifndef __MPASSTHRU_H
+#define __MPASSTHRU_H
+
+#include <linux/types.h>
+#include <linux/if_ether.h>
+#include <linux/ioctl.h>
+
+/* ioctl defines */
+#define MPASSTHRU_BINDDEV _IOW('M', 213, int)
+#define MPASSTHRU_UNBINDDEV _IO('M', 214)
+#define MPASSTHRU_SET_MEM_LOCKED _IOW('M', 215, unsigned long)
+#define MPASSTHRU_GET_MEM_LOCKED_NEED _IOR('M', 216, unsigned long)
+
+#define COPY_THRESHOLD (L1_CACHE_BYTES * 4)
+#define COPY_HDR_LEN (L1_CACHE_BYTES < 64 ? 64 : L1_CACHE_BYTES)
+
+#define DEFAULT_NEED ((8192*2*2)*4096)
+
+struct frag {
+ u16 offset;
+ u16 size;
+};
+
+#define HASH_BUCKETS (8192*2)
+struct page_info {
+ struct list_head list;
+ struct page_info *next;
+ struct page_info *prev;
+ struct page *pages[MAX_SKB_FRAGS];
+ struct sk_buff *skb;
+ struct page_pool *pool;
+
+ /* The pointer relayed to skb, to indicate
+ * it's a external allocated skb or kernel
+ */
+ struct skb_ext_page ext_page;
+ /* flag to indicate read or write */
+#define INFO_READ 0
+#define INFO_WRITE 1
+ unsigned flags;
+ /* exact number of locked pages */
+ unsigned pnum;
+
+ /* The fields after that is for backend
+ * driver, now for vhost-net.
+ */
+ /* the kiocb structure related to */
+ struct kiocb *iocb;
+ /* the ring descriptor index */
+ unsigned int desc_pos;
+ /* the iovec coming from backend, we only
+ * need few of them */
+ struct iovec hdr[2];
+ struct iovec iov[2];
+};
+
+struct page_pool {
+ /* the queue for rx side */
+ struct list_head readq;
+ /* the lock to protect readq */
+ spinlock_t read_lock;
+ /* record the orignal rlimit */
+ struct rlimit o_rlim;
+ /* userspace wants to locked */
+ int locked_pages;
+ /* currently locked pages */
+ int cur_pages;
+ /* the memory locked before */
+ unsigned long orig_locked_vm;
+ /* the device according to */
+ struct net_device *dev;
+ /* the mp_port according to dev */
+ struct mp_port port;
+ /* the hash_table list to find each locked page */
+ struct page_info **hash_table;
+};
+
+static struct kmem_cache *ext_page_info_cache;
+
+#ifdef __KERNEL__
+#if defined(CONFIG_MEDIATE_PASSTHRU) || defined(CONFIG_MEDIATE_PASSTHRU_MODULE)
+struct socket *mp_get_socket(struct file *);
+struct page_pool *page_pool_create(struct net_device *dev,
+ struct socket *sock);
+int async_recvmsg(struct kiocb *iocb, struct page_pool *pool,
+ struct iovec *iov, int count, int flags);
+int async_sendmsg(struct sock *sk, struct kiocb *iocb,
+ struct page_pool *pool, struct iovec *iov,
+ int count);
+void async_data_ready(struct sock *sk, struct page_pool *pool);
+void dev_change_state(struct net_device *dev);
+void page_pool_destroy(struct mm_struct *mm, struct page_pool *pool);
+#else
+#include <linux/err.h>
+#include <linux/errno.h>
+struct file;
+struct socket;
+static inline struct socket *mp_get_socket(struct file *f)
+{
+ return ERR_PTR(-EINVAL);
+}
+static inline struct page_pool *page_pool_create(struct net_device *dev,
+ struct socket *sock)
+{
+ return ERR_PTR(-EINVAL);
+}
+static inline int async_recvmsg(struct kiocb *iocb, struct page_pool *pool,
+ struct iovec *iov, int count, int flags)
+{
+ return -EINVAL;
+}
+static inline int async_sendmsg(struct sock *sk, struct kiocb *iocb,
+ struct page_pool *pool, struct iovec *iov,
+ int count)
+{
+ return -EINVAL;
+}
+static inline void async_data_ready(struct sock *sk, struct page_pool *pool)
+{
+ return;
+}
+static inline void dev_change_state(struct net_device *dev)
+{
+ return;
+}
+static inline void page_pool_destroy(struct mm_struct *mm,
+ struct page_pool *pool)
+{
+ return;
+}
+#endif /* CONFIG_MEDIATE_PASSTHRU */
+#endif /* __KERNEL__ */
+#endif /* __MPASSTHRU_H */
--
1.7.3
next prev parent reply other threads:[~2010-11-04 9:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-04 9:04 [PATCH v14 00/17] Provide a zero-copy method on KVM virtio-net xiaohui.xin
2010-11-04 9:04 ` [PATCH v14 01/17] Add a new structure for skb buffer from external xiaohui.xin
2010-11-04 9:04 ` [PATCH v14 02/17] Add a new struct for device to manipulate external buffer xiaohui.xin
2010-11-04 9:04 ` [PATCH v14 03/17] Add a ndo_mp_port_prep pointer to net_device_ops xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 04/17] Add a function make external buffer owner to query capability xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 05/17] Add a function to indicate if device use external buffer xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 06/17] Use callback to deal with skb_release_data() specially xiaohui.xin
2010-11-04 9:04 ` Eric Dumazet
2010-11-04 9:07 ` Eric Dumazet
2010-11-08 8:03 ` xiaohui.xin
2010-11-08 8:24 ` Eric Dumazet
2010-11-08 8:39 ` Xin, Xiaohui
2010-11-04 9:05 ` [PATCH v14 07/17]Modify netdev_alloc_page() to get external buffer xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 08/17] Modify netdev_free_page() to release " xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 09/17] Don't do skb recycle, if device use " xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 10/17] If device is in zero-copy mode first, bonding will fail xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 11/17] Add a hook to intercept external buffers from NIC driver xiaohui.xin
2010-11-04 9:05 ` xiaohui.xin [this message]
2010-11-04 9:05 ` [PATCH v14 13/17] Add mp(mediate passthru) device xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 14/17] Add a kconfig entry and make entry for mp device xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 15/17]Provides multiple submits and asynchronous notifications xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 16/17] An example how to modifiy NIC driver to use napi_gro_frags() interface xiaohui.xin
2010-11-04 9:05 ` [PATCH v14 17/17] An example how to alloc user buffer based on " xiaohui.xin
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