dma-fence-chain.h File Reference

#include <linux/dma-fence.h>
#include <linux/irq_work.h>
#include <linux/slab.h>

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Classes
struct	dma_fence_chain

Macros
#define	dma_fence_chain_alloc()    kmalloc_obj(struct dma_fence_chain)
#define	dma_fence_chain_for_each(iter, head)

Functions
struct dma_fence *	dma_fence_chain_walk (struct dma_fence *fence)
int	dma_fence_chain_find_seqno (struct dma_fence **pfence, uint64_t seqno)
void	dma_fence_chain_init (struct dma_fence_chain *chain, struct dma_fence *prev, struct dma_fence *fence, uint64_t seqno)

Macro Definition Documentation

dma_fence_chain_alloc

#define dma_fence_chain_alloc

(

)

kmalloc_obj(struct dma_fence_chain)

dma_fence_chain_alloc

Returns a new struct dma_fence_chain object or NULL on failure.

This specialized allocator has to be a macro for its allocations to be accounted separately (to have a separate alloc_tag). The typecast is intentional to enforce typesafety.

dma_fence_chain_for_each

#define dma_fence_chain_for_each	(		iter,
			head
	)

Value:

    for (iter = dma_fence_get(head); iter; \
         iter = dma_fence_chain_walk(iter))

dma_fence_chain_for_each - iterate over all fences in chain @iter: current fence @head: starting point

Iterate over all fences in the chain. We keep a reference to the current fence while inside the loop which must be dropped when breaking out.

For a deep dive iterator see dma_fence_unwrap_for_each().

Function Documentation

dma_fence_chain_find_seqno()

int dma_fence_chain_find_seqno	(	struct dma_fence **	pfence,
		uint64_t	seqno
	)

dma_fence_chain_init()

void dma_fence_chain_init	(	struct dma_fence_chain *	chain,
		struct dma_fence *	prev,
		struct dma_fence *	fence,
		uint64_t	seqno
	)

dma_fence_chain_walk()

struct dma_fence * dma_fence_chain_walk

(

struct dma_fence *

fence

)