Re: [PATCH v4 04/14] dma-buf/dma-resv: Add a way to set fence deadline

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Am 18.02.23 um 22:15 schrieb Rob Clark:
From: Rob Clark <robdclark@xxxxxxxxxxxx>

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

Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
  drivers/dma-buf/dma-resv.c | 19 +++++++++++++++++++
  include/linux/dma-resv.h   |  2 ++
  2 files changed, 21 insertions(+)

diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index 1c76aed8e262..0c86f6d577ab 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -684,6 +684,25 @@ 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)

Please add an additional description line, something like "Can be called without holding the dma_resv lock and sets @deadline on all fences filtered by @usage.".

With that done the patch is Reviewed-by: Christian König <christian.koenig@xxxxxxx>

Regards,
Christian.

+ */
+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);




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