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<div>can you make the parameter optional? Otherwise looks good to me.<br>
<br>
-David<br>
<br>
-------- Original Message --------<br>
Subject: [PATCH 1/2] drm/syncobj: add an output syncobj parameter to find_fence<br>
From: Lionel Landwerlin <br>
To: intel-gfx@lists.freedesktop.org<br>
CC: Lionel Landwerlin ,"Koenig, Christian" ,"Zhou, David(ChunMing)" ,Eric Anholt ,DRI-Devel
<br>
<br>
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<font size="2"><span style="font-size:11pt;">
<div class="PlainText">[CAUTION: External Email]<br>
<br>
We would like to get both the fence & the syncobj in i915 rather than<br>
doing 2 calls to drm_syncobj_find() & drm_syncobj_find_fence().<br>
<br>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com><br>
Cc: Christian Koenig <Christian.Koenig@amd.com><br>
Cc: David(ChunMing) Zhou <David1.Zhou@amd.com><br>
Cc: Eric Anholt <eric@anholt.net><br>
CC: DRI-Devel <dri-devel@lists.freedesktop.org><br>
---<br>
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c |  4 ++-<br>
 drivers/gpu/drm/drm_syncobj.c          | 45 +++++++++++++++++---------<br>
 drivers/gpu/drm/v3d/v3d_gem.c          |  5 ++-<br>
 include/drm/drm_syncobj.h              |  1 +<br>
 4 files changed, 38 insertions(+), 17 deletions(-)<br>
<br>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c<br>
index 2f6239b6be6f..09fde3c73a2c 100644<br>
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c<br>
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c<br>
@@ -1124,10 +1124,11 @@ static int amdgpu_syncobj_lookup_and_add_to_sync(struct amdgpu_cs_parser *p,<br>
                                                 uint32_t handle, u64 point,<br>
                                                 u64 flags)<br>
 {<br>
+       struct drm_syncobj *syncobj;<br>
        struct dma_fence *fence;<br>
        int r;<br>
<br>
-       r = drm_syncobj_find_fence(p->filp, handle, point, flags, &fence);<br>
+       r = drm_syncobj_find_fence(p->filp, handle, point, flags, &syncobj, &fence);<br>
        if (r) {<br>
                DRM_ERROR("syncobj %u failed to find fence @ %llu (%d)!\n",<br>
                          handle, point, r);<br>
@@ -1136,6 +1137,7 @@ static int amdgpu_syncobj_lookup_and_add_to_sync(struct amdgpu_cs_parser *p,<br>
<br>
        r = amdgpu_sync_fence(p->adev, &p->job->sync, fence, true);<br>
        dma_fence_put(fence);<br>
+       drm_syncobj_put(syncobj);<br>
<br>
        return r;<br>
 }<br>
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c<br>
index 3d400905100b..f2fd0c1fb1d3 100644<br>
--- a/drivers/gpu/drm/drm_syncobj.c<br>
+++ b/drivers/gpu/drm/drm_syncobj.c<br>
@@ -222,29 +222,32 @@ static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)<br>
  * @handle: sync object handle to lookup.<br>
  * @point: timeline point<br>
  * @flags: DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT or not<br>
+ * @syncobj: out parameter for the syncobj<br>
  * @fence: out parameter for the fence<br>
  *<br>
  * This is just a convenience function that combines drm_syncobj_find() and<br>
  * drm_syncobj_fence_get().<br>
  *<br>
- * Returns 0 on success or a negative error value on failure. On success @fence<br>
- * contains a reference to the fence, which must be released by calling<br>
- * dma_fence_put().<br>
+ * Returns 0 on success or a negative error value on failure. On<br>
+ * success @syncobj and @fence contains a reference respectively to<br>
+ * the syncobj and to the fence, which must be released by calling<br>
+ * respectively drm_syncobj_put() and dma_fence_put().<br>
  */<br>
 int drm_syncobj_find_fence(struct drm_file *file_private,<br>
                           u32 handle, u64 point, u64 flags,<br>
+                          struct drm_syncobj **syncobj,<br>
                           struct dma_fence **fence)<br>
 {<br>
-       struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);<br>
        struct syncobj_wait_entry wait;<br>
        u64 timeout = nsecs_to_jiffies64(DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT);<br>
        int ret;<br>
<br>
-       if (!syncobj)<br>
+       *syncobj = drm_syncobj_find(file_private, handle);<br>
+<br>
+       if (!(*syncobj))<br>
                return -ENOENT;<br>
<br>
-       *fence = drm_syncobj_fence_get(syncobj);<br>
-       drm_syncobj_put(syncobj);<br>
+       *fence = drm_syncobj_fence_get(*syncobj);<br>
<br>
        if (*fence) {<br>
                ret = dma_fence_chain_find_seqno(fence, point);<br>
@@ -255,13 +258,15 @@ int drm_syncobj_find_fence(struct drm_file *file_private,<br>
                ret = -EINVAL;<br>
        }<br>
<br>
-       if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))<br>
+       if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) {<br>
+               drm_syncobj_put(*syncobj);<br>
                return ret;<br>
+       }<br>
<br>
        memset(&wait, 0, sizeof(wait));<br>
        wait.task = current;<br>
        wait.point = point;<br>
-       drm_syncobj_fence_add_wait(syncobj, &wait);<br>
+       drm_syncobj_fence_add_wait(*syncobj, &wait);<br>
<br>
        do {<br>
                set_current_state(TASK_INTERRUPTIBLE);<br>
@@ -286,7 +291,10 @@ int drm_syncobj_find_fence(struct drm_file *file_private,<br>
        *fence = wait.fence;<br>
<br>
        if (wait.node.next)<br>
-               drm_syncobj_remove_wait(syncobj, &wait);<br>
+               drm_syncobj_remove_wait(*syncobj, &wait);<br>
+<br>
+       if (ret)<br>
+               drm_syncobj_put(*syncobj);<br>
<br>
        return ret;<br>
 }<br>
@@ -531,6 +539,7 @@ static int drm_syncobj_export_sync_file(struct drm_file *file_private,<br>
                                        int handle, int *p_fd)<br>
 {<br>
        int ret;<br>
+       struct drm_syncobj *syncobj;<br>
        struct dma_fence *fence;<br>
        struct sync_file *sync_file;<br>
        int fd = get_unused_fd_flags(O_CLOEXEC);<br>
@@ -538,13 +547,14 @@ static int drm_syncobj_export_sync_file(struct drm_file *file_private,<br>
        if (fd < 0)<br>
                return fd;<br>
<br>
-       ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence);<br>
+       ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &syncobj, &fence);<br>
        if (ret)<br>
                goto err_put_fd;<br>
<br>
        sync_file = sync_file_create(fence);<br>
<br>
        dma_fence_put(fence);<br>
+       drm_syncobj_put(syncobj);<br>
<br>
        if (!sync_file) {<br>
                ret = -EINVAL;<br>
@@ -682,7 +692,8 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,<br>
 static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,<br>
                                            struct drm_syncobj_transfer *args)<br>
 {<br>
-       struct drm_syncobj *timeline_syncobj = NULL;<br>
+       struct drm_syncobj *timeline_syncobj;<br>
+       struct drm_syncobj *src_syncobj;<br>
        struct dma_fence *fence;<br>
        struct dma_fence_chain *chain;<br>
        int ret;<br>
@@ -693,7 +704,7 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,<br>
        }<br>
        ret = drm_syncobj_find_fence(file_private, args->src_handle,<br>
                                     args->src_point, args->flags,<br>
-                                    &fence);<br>
+                                    &src_syncobj, &fence);<br>
        if (ret)<br>
                goto err;<br>
        chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);<br>
@@ -704,6 +715,7 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,<br>
        drm_syncobj_add_point(timeline_syncobj, chain, fence, args->dst_point);<br>
 err1:<br>
        dma_fence_put(fence);<br>
+       drm_syncobj_put(src_syncobj);<br>
 err:<br>
        drm_syncobj_put(timeline_syncobj);<br>
<br>
@@ -714,7 +726,8 @@ static int<br>
 drm_syncobj_transfer_to_binary(struct drm_file *file_private,<br>
                               struct drm_syncobj_transfer *args)<br>
 {<br>
-       struct drm_syncobj *binary_syncobj = NULL;<br>
+       struct drm_syncobj *binary_syncobj;<br>
+       struct drm_syncobj *src_syncobj;<br>
        struct dma_fence *fence;<br>
        int ret;<br>
<br>
@@ -722,11 +735,13 @@ drm_syncobj_transfer_to_binary(struct drm_file *file_private,<br>
        if (!binary_syncobj)<br>
                return -ENOENT;<br>
        ret = drm_syncobj_find_fence(file_private, args->src_handle,<br>
-                                    args->src_point, args->flags, &fence);<br>
+                                    args->src_point, args->flags,<br>
+                                    &src_syncobj, &fence);<br>
        if (ret)<br>
                goto err;<br>
        drm_syncobj_replace_fence(binary_syncobj, fence);<br>
        dma_fence_put(fence);<br>
+       drm_syncobj_put(src_syncobj);<br>
 err:<br>
        drm_syncobj_put(binary_syncobj);<br>
<br>
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c<br>
index 27e0f87075d9..26bd3a2e39ca 100644<br>
--- a/drivers/gpu/drm/v3d/v3d_gem.c<br>
+++ b/drivers/gpu/drm/v3d/v3d_gem.c<br>
@@ -431,6 +431,7 @@ v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,<br>
             struct v3d_job *job, void (*free)(struct kref *ref),<br>
             u32 in_sync)<br>
 {<br>
+       struct drm_syncobj *in_syncobj = NULL;<br>
        struct dma_fence *in_fence = NULL;<br>
        int ret;<br>
<br>
@@ -443,10 +444,12 @@ v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,<br>
<br>
        xa_init_flags(&job->deps, XA_FLAGS_ALLOC);<br>
<br>
-       ret = drm_syncobj_find_fence(file_priv, in_sync, 0, 0, &in_fence);<br>
+       ret = drm_syncobj_find_fence(file_priv, in_sync, 0, 0, &syncobj, &in_fence);<br>
        if (ret == -EINVAL)<br>
                goto fail;<br>
<br>
+       drm_syncobj_put(in_sync);<br>
+<br>
        ret = drm_gem_fence_array_add(&job->deps, in_fence);<br>
        if (ret)<br>
                goto fail;<br>
diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h<br>
index 6cf7243a1dc5..08eca690f783 100644<br>
--- a/include/drm/drm_syncobj.h<br>
+++ b/include/drm/drm_syncobj.h<br>
@@ -121,6 +121,7 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,<br>
                               struct dma_fence *fence);<br>
 int drm_syncobj_find_fence(struct drm_file *file_private,<br>
                           u32 handle, u64 point, u64 flags,<br>
+                          struct drm_syncobj **syncobj,<br>
                           struct dma_fence **fence);<br>
 void drm_syncobj_free(struct kref *kref);<br>
 int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,<br>
--<br>
2.21.0.392.gf8f6787159e<br>
<br>
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