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    Subject[PATCH v5 04/14] dma-buf/dma-resv: Add a way to set fence deadline
    Date
    From: Rob Clark <robdclark@chromium.org>

    Add a way to set a deadline on remaining resv fences according to the
    requested usage.

    Signed-off-by: Rob Clark <robdclark@chromium.org>
    Reviewed-by: Christian König <christian.koenig@amd.com>
    ---
    drivers/dma-buf/dma-resv.c | 22 ++++++++++++++++++++++
    include/linux/dma-resv.h | 2 ++
    2 files changed, 24 insertions(+)

    diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
    index 1c76aed8e262..2a594b754af1 100644
    --- a/drivers/dma-buf/dma-resv.c
    +++ b/drivers/dma-buf/dma-resv.c
    @@ -684,6 +684,28 @@ long dma_resv_wait_timeout(struct dma_resv *obj, enum dma_resv_usage usage,
    }
    EXPORT_SYMBOL_GPL(dma_resv_wait_timeout);

    +/**
    + * dma_resv_set_deadline - Set a deadline on reservation's objects fences
    + * @obj: the reservation object
    + * @usage: controls which fences to include, see enum dma_resv_usage.
    + * @deadline: the requested deadline (MONOTONIC)
    + *
    + * May be called without holding the dma_resv lock. Sets @deadline on
    + * all fences filtered by @usage.
    + */
    +void dma_resv_set_deadline(struct dma_resv *obj, enum dma_resv_usage usage,
    + ktime_t deadline)
    +{
    + struct dma_resv_iter cursor;
    + struct dma_fence *fence;
    +
    + dma_resv_iter_begin(&cursor, obj, usage);
    + dma_resv_for_each_fence_unlocked(&cursor, fence) {
    + dma_fence_set_deadline(fence, deadline);
    + }
    + dma_resv_iter_end(&cursor);
    +}
    +EXPORT_SYMBOL_GPL(dma_resv_set_deadline);

    /**
    * dma_resv_test_signaled - Test if a reservation object's fences have been
    diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h
    index 0637659a702c..8d0e34dad446 100644
    --- a/include/linux/dma-resv.h
    +++ b/include/linux/dma-resv.h
    @@ -479,6 +479,8 @@ int dma_resv_get_singleton(struct dma_resv *obj, enum dma_resv_usage usage,
    int dma_resv_copy_fences(struct dma_resv *dst, struct dma_resv *src);
    long dma_resv_wait_timeout(struct dma_resv *obj, enum dma_resv_usage usage,
    bool intr, unsigned long timeout);
    +void dma_resv_set_deadline(struct dma_resv *obj, enum dma_resv_usage usage,
    + ktime_t deadline);
    bool dma_resv_test_signaled(struct dma_resv *obj, enum dma_resv_usage usage);
    void dma_resv_describe(struct dma_resv *obj, struct seq_file *seq);

    --
    2.39.1
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