wrappers.h

/*
 * Copyright (C) 2005-2012 Philippe Gerum <rpm@xenomai.org>.
 *
 * Xenomai 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.
 *
 * Xenomai 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 Xenomai; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */
#ifndef _COBALT_ASM_GENERIC_WRAPPERS_H

#include <linux/version.h>

#ifdef CONFIG_IPIPE_LEGACY
#error "CONFIG_IPIPE_LEGACY must be switched off"
#endif

#define COBALT_BACKPORT(__sym) __cobalt_backport_ ##__sym

/*
 * To keep the #ifdefery as readable as possible, please:
 *
 * - keep the conditional structure flat, no nesting (e.g. do not fold
 *   the pre-3.11 conditions into the pre-3.14 ones).
 * - group all wrappers for a single kernel revision.
 * - list conditional blocks in order of kernel release, latest first
 * - identify the first kernel release for which the wrapper should
 *   be defined, instead of testing the existence of a preprocessor
 *   symbol, so that obsolete wrappers can be spotted.
 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
#define in_ia32_syscall() (current_thread_info()->status & TS_COMPAT)
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
#define user_msghdr msghdr
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
#include <linux/netdevice.h>

#undef alloc_netdev
#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
        alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
 
#include <linux/trace_seq.h>

static inline unsigned char *
trace_seq_buffer_ptr(struct trace_seq *s)
{
        return s->buffer + s->len;
}

#endif /* < 3.17 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,16,0)
#define smp_mb__before_atomic()  smp_mb()
#define smp_mb__after_atomic()   smp_mb()
#endif /* < 3.16 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0)
#define raw_cpu_ptr(v)  __this_cpu_ptr(v)
#endif /* < 3.15 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
#include <linux/pci.h>

#ifdef CONFIG_PCI
#define pci_enable_msix_range COBALT_BACKPORT(pci_enable_msix_range)
#ifdef CONFIG_PCI_MSI
int pci_enable_msix_range(struct pci_dev *dev,
                          struct msix_entry *entries,
                          int minvec, int maxvec);
#else /* !CONFIG_PCI_MSI */
static inline
int pci_enable_msix_range(struct pci_dev *dev,
                          struct msix_entry *entries,
                          int minvec, int maxvec)
{
        return -ENOSYS;
}
#endif /* !CONFIG_PCI_MSI */
#endif /* CONFIG_PCI */
#endif /* < 3.14 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
#include <linux/dma-mapping.h>
#include <linux/hwmon.h>

#define dma_set_mask_and_coherent COBALT_BACKPORT(dma_set_mask_and_coherent)
static inline
int dma_set_mask_and_coherent(struct device *dev, u64 mask)
{
        int rc = dma_set_mask(dev, mask);
        if (rc == 0)
                dma_set_coherent_mask(dev, mask);
        return rc;
}

#ifdef CONFIG_HWMON
#define hwmon_device_register_with_groups \
        COBALT_BACKPORT(hwmon_device_register_with_groups)
struct device *
hwmon_device_register_with_groups(struct device *dev, const char *name,
                                void *drvdata,
                                const struct attribute_group **groups);

#define devm_hwmon_device_register_with_groups \
        COBALT_BACKPORT(devm_hwmon_device_register_with_groups)
struct device *
devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
                                void *drvdata,
                                const struct attribute_group **groups);
#endif /* !CONFIG_HWMON */

#define reinit_completion(__x)  INIT_COMPLETION(*(__x))

#endif /* < 3.13 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
#define DEVICE_ATTR_RW(_name)   __ATTR_RW(_name)
#define DEVICE_ATTR_RO(_name)   __ATTR_RO(_name)
#define DEVICE_ATTR_WO(_name)   __ATTR_WO(_name)
#endif /* < 3.11 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
#error "Xenomai/cobalt requires Linux kernel 3.10 or above"
#endif /* < 3.10 */

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,0,0)
#define cobalt_get_restart_block(p)     (&task_thread_info(p)->restart_block)
#else
#define cobalt_get_restart_block(p)     (&(p)->restart_block)
#endif

#endif /* _COBALT_ASM_GENERIC_WRAPPERS_H */