Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/drm/drm_backport.h
/*
* Copyright (C) 2013 Red Hat
*
* This file is subject to the terms and conditions of the GNU General Public
* License v2. See the file COPYING in the main directory of this archive for
* more details.
*/
#ifndef DRM_BACKPORT_H_
#define DRM_BACKPORT_H_
#include <linux/hrtimer.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/console.h>
#include <linux/refcount.h>
#include <linux/time64.h>
static inline time64_t ktime_get_real_seconds(void)
{
return get_seconds();
}
/**
* ktime_mono_to_real - Convert monotonic time to clock realtime
*/
static inline ktime_t ktime_mono_to_real(ktime_t mono)
{
return ktime_sub(mono, ktime_get_monotonic_offset());
}
static inline void get_monotonic_boottime64(struct timespec64 *ts)
{
*ts = ktime_to_timespec64(ktime_get_boottime());
}
/*
*
*/
/**
* list_last_entry - get the last element from a list
* @ptr: the list head to take the element from.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_struct within the struct.
*
* Note, that list is expected to be not empty.
*/
#define list_last_entry(ptr, type, member) \
list_entry((ptr)->prev, type, member)
#define module_param_named_unsafe(name, value, type, perm) \
module_param_named(name, value, type, perm)
#define module_param_unsafe(name, type, perm) \
module_param(name, type, perm)
/*
*
*/
#include <linux/mm.h>
#define SHRINK_STOP (~0UL)
/*
* A callback you can register to apply pressure to ageable caches.
*
* @count_objects should return the number of freeable items in the cache. If
* there are no objects to free or the number of freeable items cannot be
* determined, it should return 0. No deadlock checks should be done during the
* count callback - the shrinker relies on aggregating scan counts that couldn't
* be executed due to potential deadlocks to be run at a later call when the
* deadlock condition is no longer pending.
*
* @scan_objects will only be called if @count_objects returned a non-zero
* value for the number of freeable objects. The callout should scan the cache
* and attempt to free items from the cache. It should then return the number
* of objects freed during the scan, or SHRINK_STOP if progress cannot be made
* due to potential deadlocks. If SHRINK_STOP is returned, then no further
* attempts to call the @scan_objects will be made from the current reclaim
* context.
*
* @flags determine the shrinker abilities, like numa awareness
*/
struct shrinker2 {
unsigned long (*count_objects)(struct shrinker2 *,
struct shrink_control *sc);
unsigned long (*scan_objects)(struct shrinker2 *,
struct shrink_control *sc);
int seeks; /* seeks to recreate an obj */
long batch; /* reclaim batch size, 0 = default */
unsigned long flags;
/* These are for internal use */
struct list_head list;
/* objs pending delete, per node */
atomic_long_t *nr_deferred;
/* compat: */
struct shrinker compat;
};
int register_shrinker2(struct shrinker2 *shrinker);
void unregister_shrinker2(struct shrinker2 *shrinker);
#define shrinker shrinker2
#define register_shrinker register_shrinker2
#define unregister_shrinker unregister_shrinker2
/*
*
*/
extern struct workqueue_struct *system_power_efficient_wq;
/*
*
*/
#include <linux/rculist.h>
#define cpu_relax_lowlatency() cpu_relax()
#define pagefault_disabled() in_atomic()
static inline int arch_phys_wc_index(int handle)
{
#ifdef CONFIG_X86
int phys_wc_to_mtrr_index(int handle);
return phys_wc_to_mtrr_index(handle);
#else
return -1;
#endif
}
/*
* avoiding/emulating 87521e16a7abbf3fa337f56cb4d1e18247f15e8a upstream:
*/
enum acpi_backlight_type {
acpi_backlight_undef = -1,
acpi_backlight_none = 0,
acpi_backlight_video,
acpi_backlight_vendor,
acpi_backlight_native,
};
static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
int acpi_video_backlight_support(void);
#if IS_ENABLED(CONFIG_ACPI_VIDEO)
bool acpi_video_verify_backlight_support(void);
if (acpi_video_backlight_support() &&
!acpi_video_verify_backlight_support())
return acpi_backlight_native;
#else
if (acpi_video_backlight_support())
return acpi_backlight_native;
#endif
return acpi_backlight_undef;
}
static inline bool apple_gmux_present(void) { return false; }
static inline bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev) { return false; }
/* cmpxchg_relaxed */
#ifndef cmpxchg_relaxed
#define cmpxchg_relaxed cmpxchg
#define cmpxchg_acquire cmpxchg
#define cmpxchg_release cmpxchg
#endif
static inline int register_vmap_purge_notifier(struct notifier_block *nb)
{
return 0;
}
static inline int unregister_vmap_purge_notifier(struct notifier_block *nb)
{
return 0;
}
enum mutex_trylock_recursive_enum {
MUTEX_TRYLOCK_FAILED = 0,
MUTEX_TRYLOCK_SUCCESS = 1,
MUTEX_TRYLOCK_RECURSIVE,
};
static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task)
{
if (!mutex_is_locked(mutex))
return false;
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)
return mutex->owner == task;
#else
/* Since UP may be pre-empted, we cannot assume that we own the lock */
return false;
#endif
}
static inline __deprecated __must_check enum mutex_trylock_recursive_enum
mutex_trylock_recursive(struct mutex *lock)
{
/* BACKPORT NOTE:
* Different from upstream to avoid backporting
* 3ca0ff571b092ee4d807f1168caa428d95b0173b, but functionally
* equivalent for i915 to previous behavior
*/
if (unlikely(mutex_is_locked_by(lock, current)))
return MUTEX_TRYLOCK_RECURSIVE;
return mutex_trylock(lock);
}
/*
* On x86 PAT systems we have memory tracking that keeps track of
* the allowed mappings on memory ranges. This tracking works for
* all the in-kernel mapping APIs (ioremap*), but where the user
* wishes to map a range from a physical device into user memory
* the tracking won't be updated. This API is to be used by
* drivers which remap physical device pages into userspace,
* and wants to make sure they are mapped WC and not UC.
*
* BACKPORT NOTES: If:
*
* 87744ab3832b mm: fix cache mode tracking in vm_insert_mixed()
*
* gets backported, then we want to backport:
*
* 8ef4227615e1 x86/io: add interface to reserve io memtype for a resource range. (v1.1)
*
* and drop these next two stubs
*/
static inline int arch_io_reserve_memtype_wc(resource_size_t base,
resource_size_t size)
{
return 0;
}
static inline void arch_io_free_memtype_wc(resource_size_t base,
resource_size_t size)
{
}
static inline int __must_check down_write_killable(struct rw_semaphore *sem)
{
down_write(sem);
return 0;
}
static inline long __drm_get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, unsigned long nr_pages, int write,
int force, struct page **pages, struct vm_area_struct **vmas)
{
return get_user_pages(tsk, mm, start, nr_pages, write, force, pages, vmas);
}
#define get_user_pages_remote(c, mm, start, nr_pages, write, pages, vmas, locked) \
__drm_get_user_pages(c, mm, start, nr_pages, write, 0, pages, vmas)
#define get_user_pages(start, nr_pages, write, pages, vmas) \
__drm_get_user_pages(current, current->mm, start, nr_pages, write, 0, pages, vmas)
#define smp_store_mb(var, value) set_mb(var, value)
#ifndef atomic_set_release
#define atomic_set_release(v, i) smp_store_release(&(v)->counter, (i))
#endif
#ifdef CONFIG_X86
#ifndef atomic_andnot
static inline void atomic_andnot(int i, atomic_t *v)
{
atomic_and(~i, v);
}
#endif
#endif
/* drm_panel stubs to make i915 happy.. I don't think we support any hw
* using DSI and panel stuff without some work will be unhappy on power
* or anything else w/ CONFIG_OF..
*/
struct drm_panel;
struct drm_connector;
static inline void drm_panel_init(struct drm_panel *panel) {}
static inline int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
{
return -ENXIO;
}
static inline int drm_panel_detach(struct drm_panel *panel)
{
return 0;
}
static inline int drm_panel_add(struct drm_panel *panel)
{
return -ENXIO;
}
static inline void drm_panel_remove(struct drm_panel *panel) {}
typedef wait_queue_t wait_queue_entry_t;
#define __add_wait_queue_entry_tail __add_wait_queue_tail
unsigned int swiotlb_max_size(void);
#define swiotlb_max_segment swiotlb_max_size
#define SLAB_TYPESAFE_BY_RCU SLAB_DESTROY_BY_RCU
#include <linux/fs.h>
static inline int call_mmap(struct file *file, struct vm_area_struct *vma)
{
return file->f_op->mmap(file, vma);
}
static inline void mmgrab(struct mm_struct *mm)
{
atomic_inc(&mm->mm_count);
}
/*
* since we just use get_user()/put_user() for unsafe_put_user()
* and unsafe_get_user(), these can be no-op
*/
#define user_access_begin() do {} while (0)
#define user_access_end() do {} while (0)
#define unsafe_put_user(x, ptr, err_label) \
do { \
int __pu_err = put_user(x, ptr); \
if (unlikely(__pu_err)) goto err_label; \
} while (0)
#define unsafe_get_user(x, ptr, err_label) \
do { \
int __gu_err = get_user(x, ptr); \
if (unlikely(__gu_err)) goto err_label; \
} while (0)
/*
* We don't have the commits in the rhel7 kernel which necessitate
* this flag, so it is just zero. Define it as an enum so if someone
* does backport the pci/pm patches, it won't go unnoticed that this
* needs to be removed. See bac2a909a096c9110525c18cbb8ce73c660d5f71
* and 4d071c3238987325b9e50e33051a40d1cce311cc upstream.
*/
enum {
PCI_DEV_FLAGS_NEEDS_RESUME = 0,
};
#define get_random_u32() ((u32)get_random_int())
#define dev_pm_set_driver_flags(...) do { } while (0)
#define __GFP_RETRY_MAYFAIL __GFP_REPEAT
/* TODO partial backport of a55bbd375d1802141f0f043e2cd08f85c23d6209 */
#define idr_for_each_entry_continue(idp, entry, id) \
for ((entry) = idr_get_next((idp), &(id)); \
entry; \
++id, (entry) = idr_get_next((idp), &(id)))
/* until 8eb8284b412906181357c2b0110d879d5af95e52 is backported: */
#define kmem_cache_create_usercopy(n, s, a, f, uo, us, c) \
kmem_cache_create(n, s, a, f, c)
int __init drm_backport_init(void);
void __exit drm_backport_exit(void);
#undef pr_fmt
#endif /* DRM_BACKPORT_H_ */
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