LCOV - code coverage report
Current view: top level - include/linux - dma-fence-array.h (source / functions) Hit Total Coverage
Test: Real Lines: 0 2 0.0 %
Date: 2020-10-17 15:46:16 Functions: 0 0 -
Legend: Neither, QEMU, Real, Both Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0-only */
       2                 :            : /*
       3                 :            :  * fence-array: aggregates fence to be waited together
       4                 :            :  *
       5                 :            :  * Copyright (C) 2016 Collabora Ltd
       6                 :            :  * Copyright (C) 2016 Advanced Micro Devices, Inc.
       7                 :            :  * Authors:
       8                 :            :  *      Gustavo Padovan <gustavo@padovan.org>
       9                 :            :  *      Christian König <christian.koenig@amd.com>
      10                 :            :  */
      11                 :            : 
      12                 :            : #ifndef __LINUX_DMA_FENCE_ARRAY_H
      13                 :            : #define __LINUX_DMA_FENCE_ARRAY_H
      14                 :            : 
      15                 :            : #include <linux/dma-fence.h>
      16                 :            : #include <linux/irq_work.h>
      17                 :            : 
      18                 :            : /**
      19                 :            :  * struct dma_fence_array_cb - callback helper for fence array
      20                 :            :  * @cb: fence callback structure for signaling
      21                 :            :  * @array: reference to the parent fence array object
      22                 :            :  */
      23                 :            : struct dma_fence_array_cb {
      24                 :            :         struct dma_fence_cb cb;
      25                 :            :         struct dma_fence_array *array;
      26                 :            : };
      27                 :            : 
      28                 :            : /**
      29                 :            :  * struct dma_fence_array - fence to represent an array of fences
      30                 :            :  * @base: fence base class
      31                 :            :  * @lock: spinlock for fence handling
      32                 :            :  * @num_fences: number of fences in the array
      33                 :            :  * @num_pending: fences in the array still pending
      34                 :            :  * @fences: array of the fences
      35                 :            :  * @work: internal irq_work function
      36                 :            :  */
      37                 :            : struct dma_fence_array {
      38                 :            :         struct dma_fence base;
      39                 :            : 
      40                 :            :         spinlock_t lock;
      41                 :            :         unsigned num_fences;
      42                 :            :         atomic_t num_pending;
      43                 :            :         struct dma_fence **fences;
      44                 :            : 
      45                 :            :         struct irq_work work;
      46                 :            : };
      47                 :            : 
      48                 :            : extern const struct dma_fence_ops dma_fence_array_ops;
      49                 :            : 
      50                 :            : /**
      51                 :            :  * dma_fence_is_array - check if a fence is from the array subsclass
      52                 :            :  * @fence: fence to test
      53                 :            :  *
      54                 :            :  * Return true if it is a dma_fence_array and false otherwise.
      55                 :            :  */
      56                 :            : static inline bool dma_fence_is_array(struct dma_fence *fence)
      57                 :            : {
      58                 :          0 :         return fence->ops == &dma_fence_array_ops;
      59                 :            : }
      60                 :            : 
      61                 :            : /**
      62                 :            :  * to_dma_fence_array - cast a fence to a dma_fence_array
      63                 :            :  * @fence: fence to cast to a dma_fence_array
      64                 :            :  *
      65                 :            :  * Returns NULL if the fence is not a dma_fence_array,
      66                 :            :  * or the dma_fence_array otherwise.
      67                 :            :  */
      68                 :            : static inline struct dma_fence_array *
      69                 :            : to_dma_fence_array(struct dma_fence *fence)
      70                 :            : {
      71                 :          0 :         if (fence->ops != &dma_fence_array_ops)
      72                 :            :                 return NULL;
      73                 :            : 
      74                 :            :         return container_of(fence, struct dma_fence_array, base);
      75                 :            : }
      76                 :            : 
      77                 :            : struct dma_fence_array *dma_fence_array_create(int num_fences,
      78                 :            :                                                struct dma_fence **fences,
      79                 :            :                                                u64 context, unsigned seqno,
      80                 :            :                                                bool signal_on_any);
      81                 :            : 
      82                 :            : bool dma_fence_match_context(struct dma_fence *fence, u64 context);
      83                 :            : 
      84                 :            : #endif /* __LINUX_DMA_FENCE_ARRAY_H */
    

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