From patchwork Thu Nov 4 09:04:58 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 301552 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oA48o4sm010587 for ; Thu, 4 Nov 2010 08:50:04 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753585Ab0KDIoB (ORCPT ); Thu, 4 Nov 2010 04:44:01 -0400 Received: from mga02.intel.com ([134.134.136.20]:34881 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753342Ab0KDIn6 (ORCPT ); Thu, 4 Nov 2010 04:43:58 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 04 Nov 2010 01:43:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.58,294,1286175600"; d="scan'208";a="570251148" Received: from gw-vmm.sh.intel.com (HELO localhost.localdomain.org) ([10.239.48.110]) by orsmga002.jf.intel.com with ESMTP; 04 Nov 2010 01:43:56 -0700 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.hengli.com.au, jdike@linux.intel.com Cc: Xin Xiaohui Subject: [PATCH v14 02/17] Add a new struct for device to manipulate external buffer. Date: Thu, 4 Nov 2010 17:04:58 +0800 Message-Id: <38fbf05a450b34e939aa1b0f3a5126711990f0cc.1288860477.git.xiaohui.xin@intel.com> X-Mailer: git-send-email 1.7.3 In-Reply-To: <1288861513-5707-1-git-send-email-xiaohui.xin@intel.com> References: <1288861513-5707-1-git-send-email-xiaohui.xin@intel.com> In-Reply-To: References: Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Thu, 04 Nov 2010 08:50:04 +0000 (UTC) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 46c36ff..f6b1870 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -325,6 +325,28 @@ enum netdev_state_t { __LINK_STATE_DORMANT, }; +/*The structure for mediate passthru(zero-copy). */ +struct mp_port { + /* the header len */ + int hdr_len; + /* the max payload len for one descriptor */ + int data_len; + /* the pages for DMA in one time */ + int npages; + /* the socket bind to */ + struct socket *sock; + /* the header len for virtio-net */ + int vnet_hlen; + /* the external buffer page creator */ + struct skb_ext_page *(*ctor)(struct mp_port *, + struct sk_buff *, int); + /* the hash function attached to find according + * backend ring descriptor info for one external + * buffer page. + */ + struct skb_ext_page *(*hash)(struct net_device *, + struct page *); +}; /* * This structure holds at boot time configured netdevice settings. They @@ -1045,7 +1067,8 @@ struct net_device { /* GARP */ struct garp_port *garp_port; - + /* mpassthru */ + struct mp_port *mp_port; /* class/net/name entry */ struct device dev; /* space for optional device, statistics, and wireless sysfs groups */