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| author | Maarten Lankhorst <maarten.lankhorst@canonical.com> | 2014-07-01 12:57:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-08 13:36:14 -0700 |
| commit | 0ba6b8fb91fc051535c7612f6241c8197d92323b (patch) | |
| tree | 94d403c4d80ad8b1974ec075047d4838ab6c9f7c /include/linux/reservation.h | |
| parent | 0f0d8406fb9c3c5ed1b1609a0f51c504c5b37aea (diff) | |
| download | linux-0-day-0ba6b8fb91fc051535c7612f6241c8197d92323b.tar.gz linux-0-day-0ba6b8fb91fc051535c7612f6241c8197d92323b.tar.xz | |
reservation: add support for fences to enable cross-device synchronisation
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/reservation.h')
| -rw-r--r-- | include/linux/reservation.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/linux/reservation.h b/include/linux/reservation.h index 813dae960ebdc..f3f57460a205f 100644 --- a/include/linux/reservation.h +++ b/include/linux/reservation.h @@ -6,7 +6,7 @@ * Copyright (C) 2012 Texas Instruments * * Authors: - * Rob Clark <rob.clark@linaro.org> + * Rob Clark <robdclark@gmail.com> * Maarten Lankhorst <maarten.lankhorst@canonical.com> * Thomas Hellstrom <thellstrom-at-vmware-dot-com> * @@ -40,22 +40,40 @@ #define _LINUX_RESERVATION_H #include <linux/ww_mutex.h> +#include <linux/fence.h> +#include <linux/slab.h> extern struct ww_class reservation_ww_class; struct reservation_object { struct ww_mutex lock; + + struct fence *fence_excl; + struct fence **fence_shared; + u32 fence_shared_count, fence_shared_max; }; 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; } static inline void reservation_object_fini(struct reservation_object *obj) { + int i; + + 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); + ww_mutex_destroy(&obj->lock); } |