[RFC v4 02/14] drm/i915/vm_bind: Add __i915_sw_fence_await_reservation()

[Niranjana Vishwanathapura]

Add function __i915_sw_fence_await_reservation() for
asynchronous wait on a dma-resv object with specified
dma_resv_usage. This is required for async vma unbind
with vm_bind.

Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
---
 drivers/gpu/drm/i915/i915_sw_fence.c | 25 ++++++++++++++++++-------
 drivers/gpu/drm/i915/i915_sw_fence.h |  7 ++++++-
 2 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c
index 6fc0d1b89690..0ce8f4efc1ed 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.c
+++ b/drivers/gpu/drm/i915/i915_sw_fence.c
@@ -569,12 +569,11 @@ int __i915_sw_fence_await_dma_fence(struct i915_sw_fence *fence,
 	return ret;
 }
 
-int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
-				    struct dma_resv *resv,
-				    const struct dma_fence_ops *exclude,
-				    bool write,
-				    unsigned long timeout,
-				    gfp_t gfp)
+int __i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
+				      struct dma_resv *resv,
+				      enum dma_resv_usage usage,
+				      unsigned long timeout,
+				      gfp_t gfp)
 {
 	struct dma_resv_iter cursor;
 	struct dma_fence *f;
@@ -583,7 +582,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
 	debug_fence_assert(fence);
 	might_sleep_if(gfpflags_allow_blocking(gfp));
 
-	dma_resv_iter_begin(&cursor, resv, dma_resv_usage_rw(write));
+	dma_resv_iter_begin(&cursor, resv, usage);
 	dma_resv_for_each_fence_unlocked(&cursor, f) {
 		pending = i915_sw_fence_await_dma_fence(fence, f, timeout,
 							gfp);
@@ -598,6 +597,18 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
 	return ret;
 }
 
+int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
+				    struct dma_resv *resv,
+				    const struct dma_fence_ops *exclude,
+				    bool write,
+				    unsigned long timeout,
+				    gfp_t gfp)
+{
+	return __i915_sw_fence_await_reservation(fence, resv,
+						 dma_resv_usage_rw(write),
+						 timeout, gfp);
+}
+
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
 #include "selftests/lib_sw_fence.c"
 #include "selftests/i915_sw_fence.c"
diff --git a/drivers/gpu/drm/i915/i915_sw_fence.h b/drivers/gpu/drm/i915/i915_sw_fence.h
index 619fc5a22f0c..3cf4b6e16f35 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.h
+++ b/drivers/gpu/drm/i915/i915_sw_fence.h
@@ -10,13 +10,13 @@
 #define _I915_SW_FENCE_H_
 
 #include <linux/dma-fence.h>
+#include <linux/dma-resv.h>
 #include <linux/gfp.h>
 #include <linux/kref.h>
 #include <linux/notifier.h> /* for NOTIFY_DONE */
 #include <linux/wait.h>
 
 struct completion;
-struct dma_resv;
 struct i915_sw_fence;
 
 enum i915_sw_fence_notify {
@@ -89,6 +89,11 @@ int i915_sw_fence_await_dma_fence(struct i915_sw_fence *fence,
 				  unsigned long timeout,
 				  gfp_t gfp);
 
+int __i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
+				      struct dma_resv *resv,
+				      enum dma_resv_usage usage,
+				      unsigned long timeout,
+				      gfp_t gfp);
 int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
 				    struct dma_resv *resv,
 				    const struct dma_fence_ops *exclude,
-- 
2.21.0.rc0.32.g243a4c7e27