347 lines
10 KiB
C
347 lines
10 KiB
C
/*********************************************************
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* Copyright (C) 2002 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*********************************************************/
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#ifndef __COMPAT_NETDEVICE_H__
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# define __COMPAT_NETDEVICE_H__
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/pci.h>
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/*
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* The enet_statistics structure moved from linux/if_ether.h to
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* linux/netdevice.h and is renamed net_device_stats in 2.1.25 --hpreg
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*/
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 1, 25)
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# include <linux/if_ether.h>
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# define net_device_stats enet_statistics
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#endif
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/* The netif_rx_ni() API appeared in 2.4.8 --hpreg */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 8)
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# define netif_rx_ni netif_rx
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#endif
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/* The device struct was renamed net_device in 2.3.14 --hpreg */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 3, 14)
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# define net_device device
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#endif
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/*
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* SET_MODULE_OWNER appeared sometime during 2.3.x. It was setting
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* dev->owner = THIS_MODULE until 2.5.70, where netdevice refcounting
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* was completely changed. SET_MODULE_OWNER was nop for whole
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* 2.6.x series, and finally disappeared in 2.6.24.
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*
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* MOD_xxx_USE_COUNT wrappers are here, as they must be mutually
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* exclusive with SET_MODULE_OWNER call.
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*/
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0)
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# define COMPAT_SET_MODULE_OWNER(dev) do {} while (0)
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# define COMPAT_NETDEV_MOD_INC_USE_COUNT MOD_INC_USE_COUNT
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# define COMPAT_NETDEV_MOD_DEC_USE_COUNT MOD_DEC_USE_COUNT
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#else
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# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
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# define COMPAT_SET_MODULE_OWNER(dev) SET_MODULE_OWNER(dev)
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# else
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# define COMPAT_SET_MODULE_OWNER(dev) do {} while (0)
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# endif
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# define COMPAT_NETDEV_MOD_INC_USE_COUNT do {} while (0)
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# define COMPAT_NETDEV_MOD_DEC_USE_COUNT do {} while (0)
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#endif
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/*
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* SET_NETDEV_DEV appeared sometime during 2.5.x, and later was
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* crossported to various 2.4.x kernels (as dummy macro).
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*/
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#ifdef SET_NETDEV_DEV
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# define COMPAT_SET_NETDEV_DEV(dev, pdev) SET_NETDEV_DEV(dev, pdev)
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#else
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# define COMPAT_SET_NETDEV_DEV(dev, pdev) do {} while (0)
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#endif
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/*
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* Build alloc_etherdev API on the top of init_etherdev. For 2.0.x kernels
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* we must provide dummy init method, otherwise register_netdev does
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* nothing.
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*/
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 3)
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 2, 0)
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int
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vmware_dummy_init(struct net_device *dev)
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{
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return 0;
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}
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#endif
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static inline struct net_device*
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compat_alloc_etherdev(int priv_size)
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{
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struct net_device* dev;
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int size = sizeof *dev + priv_size;
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/*
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* The name is dynamically allocated before 2.4.0, but
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* is an embedded array in later kernels.
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*/
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0)
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size += sizeof("ethXXXXXXX");
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#endif
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dev = kmalloc(size, GFP_KERNEL);
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if (dev) {
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memset(dev, 0, size);
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if (priv_size) {
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dev->priv = dev + 1;
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}
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0)
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dev->name = (char *)(dev + 1) + priv_size;
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 2, 0)
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dev->init = vmware_dummy_init;
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#endif
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if (init_etherdev(dev, 0) != dev) {
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kfree(dev);
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dev = NULL;
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}
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}
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return dev;
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}
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#else
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#define compat_alloc_etherdev(sz) alloc_etherdev(sz)
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#endif
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/*
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* alloc_netdev and free_netdev are there since 2.4.23. Their use is mandatory
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* since 2.6.24.
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*/
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 23)
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static inline struct net_device *
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compat_alloc_netdev(int priv_size,
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const char *mask,
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void (*setup)(struct net_device *))
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{
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struct net_device *dev;
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int netdev_size = sizeof *dev;
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int alloc_size;
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# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0)
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netdev_size += IFNAMSIZ;
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# endif
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alloc_size = netdev_size + priv_size;
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dev = kmalloc(alloc_size, GFP_KERNEL);
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if (dev) {
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memset(dev, 0, alloc_size);
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dev->priv = (char*)dev + netdev_size;
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setup(dev);
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# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0)
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dev->name = (char*)(dev + 1);
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# endif
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strcpy(dev->name, mask);
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}
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return dev;
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}
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# define compat_free_netdev(dev) kfree(dev)
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#else
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# define compat_alloc_netdev(size, mask, setup) alloc_netdev(size, mask, setup)
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# define compat_free_netdev(dev) free_netdev(dev)
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#endif
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/* netdev_priv() appeared in 2.6.3 */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 3)
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# define compat_netdev_priv(netdev) (netdev)->priv
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#else
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# define compat_netdev_priv(netdev) netdev_priv(netdev)
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#endif
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/*
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* In 3.1 merge window feature maros were removed from mainline,
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* so let's add back ones we care about.
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*/
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#if !defined(HAVE_NET_DEVICE_OPS) && \
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LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
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# define HAVE_NET_DEVICE_OPS 1
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 9)
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# define COMPAT_NETDEV_TX_OK NETDEV_TX_OK
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# define COMPAT_NETDEV_TX_BUSY NETDEV_TX_BUSY
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#else
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# define COMPAT_NETDEV_TX_OK 0
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# define COMPAT_NETDEV_TX_BUSY 1
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#endif
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/* unregister_netdevice_notifier was not safe prior to 2.6.17 */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 17) && \
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!defined(ATOMIC_NOTIFIER_INIT)
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/* pre 2.6.17 and not patched */
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static inline int compat_unregister_netdevice_notifier(struct notifier_block *nb) {
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int err;
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rtnl_lock();
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err = unregister_netdevice_notifier(nb);
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rtnl_unlock();
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return err;
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}
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#else
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/* post 2.6.17 or patched */
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#define compat_unregister_netdevice_notifier(_nb) \
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unregister_netdevice_notifier(_nb);
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) || defined(__VMKLNX__)
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# define compat_netif_napi_add(dev, napi, poll, quota) \
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netif_napi_add(dev, napi, poll, quota)
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# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30) || \
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defined VMW_NETIF_SINGLE_NAPI_PARM
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# define compat_napi_complete(dev, napi) napi_complete(napi)
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# define compat_napi_schedule(dev, napi) napi_schedule(napi)
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# else
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# define compat_napi_complete(dev, napi) netif_rx_complete(dev, napi)
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# define compat_napi_schedule(dev, napi) netif_rx_schedule(dev, napi)
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# endif
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# define compat_napi_enable(dev, napi) napi_enable(napi)
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# define compat_napi_disable(dev, napi) napi_disable(napi)
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#else
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# define compat_napi_complete(dev, napi) netif_rx_complete(dev)
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# define compat_napi_schedule(dev, napi) netif_rx_schedule(dev)
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# define compat_napi_enable(dev, napi) netif_poll_enable(dev)
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# define compat_napi_disable(dev, napi) netif_poll_disable(dev)
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/* RedHat ported GRO to 2.6.18 bringing new napi_struct with it */
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# if defined NETIF_F_GRO
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# define compat_netif_napi_add(netdev, napi, pollcb, quota) \
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do { \
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(netdev)->poll = (pollcb); \
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(netdev)->weight = (quota);\
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(napi)->dev = (netdev); \
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} while (0)
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# else
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struct napi_struct {
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int dummy;
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};
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# define compat_netif_napi_add(dev, napi, pollcb, quota) \
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do { \
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(dev)->poll = (pollcb); \
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(dev)->weight = (quota);\
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} while (0)
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# endif
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#endif
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#ifdef NETIF_F_TSO6
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# define COMPAT_NETIF_F_TSO (NETIF_F_TSO6 | NETIF_F_TSO)
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#else
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# define COMPAT_NETIF_F_TSO (NETIF_F_TSO)
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
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# define compat_netif_tx_lock(dev) netif_tx_lock(dev)
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# define compat_netif_tx_unlock(dev) netif_tx_unlock(dev)
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#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
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# define compat_netif_tx_lock(dev) spin_lock(&dev->xmit_lock)
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# define compat_netif_tx_unlock(dev) spin_unlock(&dev->xmit_lock)
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#else
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/* Vendor backporting (SLES 10) has muddled the tx_lock situation. Pick whichever
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* of the above works for you. */
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# define compat_netif_tx_lock(dev) do {} while (0)
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# define compat_netif_tx_unlock(dev) do {} while (0)
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
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# define COMPAT_VLAN_GROUP_ARRAY_LEN VLAN_N_VID
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# define compat_flush_scheduled_work(work) cancel_work_sync(work)
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#else
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# define COMPAT_VLAN_GROUP_ARRAY_LEN VLAN_GROUP_ARRAY_LEN
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# define compat_flush_scheduled_work(work) flush_scheduled_work()
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#endif
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/*
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* For kernel versions older than 2.6.29, where pci_msi_enabled is not
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* available, check if
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* 1. CONFIG_PCI_MSI is present
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* 2. kernel version is newer than 2.6.25 (because multiqueue is not
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* supporter) in kernels older than that)
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* 3. msi can be enabled. If it fails it means that MSI is not available.
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* When all the above are true, return non-zero so that multiple queues will be
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* allowed in the driver.
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*/
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
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# define compat_multiqueue_allowed(dev) pci_msi_enabled()
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#else
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# if defined CONFIG_PCI_MSI && LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 25)
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static inline int
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compat_multiqueue_allowed(struct pci_dev *dev)
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{
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int ret;
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if (!pci_enable_msi(dev))
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ret = 1;
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else
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ret = 0;
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pci_disable_msi(dev);
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return ret;
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}
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# else
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# define compat_multiqueue_allowed(dev) (0)
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# endif
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
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# define compat_vlan_get_protocol(skb) vlan_get_protocol(skb)
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#else
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# define compat_vlan_get_protocol(skb) (skb->protocol)
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 3, 0)
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typedef netdev_features_t compat_netdev_features_t;
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#else
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typedef u32 compat_netdev_features_t;
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) || defined(VMW_NETIF_TRANS_UPDATE)
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#define compat_netif_trans_update(d) netif_trans_update(d)
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#else
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#define compat_netif_trans_update(d) do { (d)->trans_start = jiffies; } while (0)
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#endif
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#endif /* __COMPAT_NETDEVICE_H__ */
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