GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-22 23:04:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

reservation: update api and add some helpers

Browse source 
Move the list of shared fences to a struct, and return it in
reservation_object_get_list().
Add reservation_object_get_excl to get the exclusive fence.

Add reservation_object_reserve_shared(), which reserves space
in the reservation_object for 1 more shared fence.

reservation_object_add_shared_fence() and
reservation_object_add_excl_fence() are used to assign a new
fence to a reservation_object pointer, to complete a reservation.

Changes since v1:
- Add reservation_object_get_excl, reorder code a bit.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maarten Lankhorst 2014-07-01 12:57:54 +02:00 • committed by Greg Kroah-Hartman
parent 9b495a5887
commit 04a5faa8cb
4 changed files with 229 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

56
include/linux/reservation.h
View file

@ -45,36 +45,78 @@
extern struct ww_class reservation_ww_class;
struct reservation_object_list {
u32 shared_count, shared_max;
struct fence *shared[];
};
struct reservation_object {
struct ww_mutex lock;
struct fence *fence_excl;
struct fence **fence_shared;
u32 fence_shared_count, fence_shared_max;
struct reservation_object_list *fence;
struct reservation_object_list *staged;
};
#define reservation_object_assert_held(obj) \
lockdep_assert_held(&(obj)->lock.base)
static inline void
reservation_object_init(struct reservation_object *obj)
{
ww_mutex_init(&obj->lock, &reservation_ww_class);
obj->fence_shared_count = obj->fence_shared_max = 0;
obj->fence_shared = NULL;
obj->fence_excl = NULL;
obj->fence = NULL;
obj->staged = NULL;
}
static inline void
reservation_object_fini(struct reservation_object *obj)
{
int i;
struct reservation_object_list *fobj;
/*
* This object should be dead and all references must have
* been released to it.
*/
if (obj->fence_excl)
fence_put(obj->fence_excl);
for (i = 0; i < obj->fence_shared_count; ++i)
fence_put(obj->fence_shared[i]);
kfree(obj->fence_shared);
fobj = obj->fence;
if (fobj) {
for (i = 0; i < fobj->shared_count; ++i)
fence_put(fobj->shared[i]);
kfree(fobj);
}
kfree(obj->staged);
ww_mutex_destroy(&obj->lock);
}
static inline struct reservation_object_list *
reservation_object_get_list(struct reservation_object *obj)
{
reservation_object_assert_held(obj);
return obj->fence;
}
static inline struct fence *
reservation_object_get_excl(struct reservation_object *obj)
{
reservation_object_assert_held(obj);
return obj->fence_excl;
}
int reservation_object_reserve_shared(struct reservation_object *obj);
void reservation_object_add_shared_fence(struct reservation_object *obj,
struct fence *fence);
void reservation_object_add_excl_fence(struct reservation_object *obj,
struct fence *fence);
#endif /* _LINUX_RESERVATION_H */