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dma-buf: finally make the dma_resv_list private v2

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Drivers should never touch this directly.

v2: drop kerneldoc for now internal handling

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220321135856.1331-2-christian.koenig@amd.com
This commit is contained in:
Christian König
2021-09-24 14:19:22 +02:00
parent 548e7432dc
commit 8938d48451
2 changed files with 12 additions and 25 deletions
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drivers/dma-buf/dma-resv.c
+11
View File
@@ -56,6 +56,12 @@
DEFINE_WD_CLASS(reservation_ww_class);
EXPORT_SYMBOL(reservation_ww_class);
struct dma_resv_list {
struct rcu_head rcu;
u32 shared_count, shared_max;
struct dma_fence __rcu *shared[];
};
/**
* dma_resv_list_alloc - allocate fence list
* @shared_max: number of fences we need space for
@@ -133,6 +139,11 @@ void dma_resv_fini(struct dma_resv *obj)
}
EXPORT_SYMBOL(dma_resv_fini);
static inline struct dma_resv_list *dma_resv_shared_list(struct dma_resv *obj)
{
return rcu_dereference_check(obj->fence, dma_resv_held(obj));
}
/**
* dma_resv_reserve_shared - Reserve space to add shared fences to
* a dma_resv.
include/linux/dma-resv.h
+1 -25
View File
@@ -47,18 +47,7 @@
extern struct ww_class reservation_ww_class;
/**
* struct dma_resv_list - a list of shared fences
* @rcu: for internal use
* @shared_count: table of shared fences
* @shared_max: for growing shared fence table
* @shared: shared fence table
*/
struct dma_resv_list {
struct rcu_head rcu;
u32 shared_count, shared_max;
struct dma_fence __rcu *shared[];
};
struct dma_resv_list;
/**
* struct dma_resv - a reservation object manages fences for a buffer
@@ -451,19 +440,6 @@ dma_resv_excl_fence(struct dma_resv *obj)
return rcu_dereference_check(obj->fence_excl, dma_resv_held(obj));
}
/**
* dma_resv_shared_list - get the reservation object's shared fence list
* @obj: the reservation object
*
* Returns the shared fence list. Caller must either hold the objects
* through dma_resv_lock() or the RCU read side lock through rcu_read_lock(),
* or one of the variants of each
*/
static inline struct dma_resv_list *dma_resv_shared_list(struct dma_resv *obj)
{
return rcu_dereference_check(obj->fence, dma_resv_held(obj));
}
void dma_resv_init(struct dma_resv *obj);
void dma_resv_fini(struct dma_resv *obj);
int dma_resv_reserve_shared(struct dma_resv *obj, unsigned int num_fences);