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authorChunming Zhou <david1.zhou@amd.com>2019-04-01 17:50:57 +0800
committerChristian König <christian.koenig@amd.com>2019-04-01 12:06:11 +0200
commit01d6c357837918d8186b9f520e167d98e3d560cc (patch)
tree1d691c84d55e6f25060ab6c40788c312197bded3 /drivers/gpu/drm/drm_syncobj.c
parent44f8a1396e83f1030eaf18591b3f106235118a64 (diff)
drm/syncobj: add support for timeline point wait v8
points array is one-to-one match with syncobjs array. v2: add seperate ioctl for timeline point wait, otherwise break uapi. v3: userspace can specify two kinds waits:: a. Wait for time point to be completed. b. and wait for time point to become available v4: rebase v5: add comment for xxx_WAIT_AVAILABLE v6: rebase and rework on new container v7: drop _WAIT_COMPLETED, it is the default anyway v8: correctly handle garbage collected fences Signed-off-by: Chunming Zhou <david1.zhou@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Cc: Tobias Hector <Tobias.Hector@amd.com> Cc: Jason Ekstrand <jason@jlekstrand.net> Cc: Dave Airlie <airlied@redhat.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Link: https://patchwork.freedesktop.org/patch/295782/?series=58813&rev=1
Diffstat (limited to 'drivers/gpu/drm/drm_syncobj.c')
-rw-r--r--drivers/gpu/drm/drm_syncobj.c153
1 files changed, 124 insertions, 29 deletions
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index dbe4a1c75fbc..b1262e92011c 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -61,6 +61,7 @@ struct syncobj_wait_entry {
struct task_struct *task;
struct dma_fence *fence;
struct dma_fence_cb fence_cb;
+ u64 point;
};
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
@@ -95,6 +96,8 @@ EXPORT_SYMBOL(drm_syncobj_find);
static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait)
{
+ struct dma_fence *fence;
+
if (wait->fence)
return;
@@ -103,11 +106,15 @@ static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
* have the lock, try one more time just to be sure we don't add a
* callback when a fence has already been set.
*/
- if (syncobj->fence)
- wait->fence = dma_fence_get(
- rcu_dereference_protected(syncobj->fence, 1));
- else
+ fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1));
+ if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
+ dma_fence_put(fence);
list_add_tail(&wait->node, &syncobj->cb_list);
+ } else if (!fence) {
+ wait->fence = dma_fence_get_stub();
+ } else {
+ wait->fence = fence;
+ }
spin_unlock(&syncobj->lock);
}
@@ -150,10 +157,8 @@ void drm_syncobj_add_point(struct drm_syncobj *syncobj,
dma_fence_chain_init(chain, prev, fence, point);
rcu_assign_pointer(syncobj->fence, &chain->base);
- list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
- list_del_init(&cur->node);
+ list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
syncobj_wait_syncobj_func(syncobj, cur);
- }
spin_unlock(&syncobj->lock);
/* Walk the chain once to trigger garbage collection */
@@ -185,10 +190,8 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
rcu_assign_pointer(syncobj->fence, fence);
if (fence != old_fence) {
- list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
- list_del_init(&cur->node);
+ list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
syncobj_wait_syncobj_func(syncobj, cur);
- }
}
spin_unlock(&syncobj->lock);
@@ -645,13 +648,27 @@ static void syncobj_wait_fence_func(struct dma_fence *fence,
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait)
{
+ struct dma_fence *fence;
+
/* This happens inside the syncobj lock */
- wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
- lockdep_is_held(&syncobj->lock)));
+ fence = rcu_dereference_protected(syncobj->fence,
+ lockdep_is_held(&syncobj->lock));
+ dma_fence_get(fence);
+ if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
+ dma_fence_put(fence);
+ return;
+ } else if (!fence) {
+ wait->fence = dma_fence_get_stub();
+ } else {
+ wait->fence = fence;
+ }
+
wake_up_process(wait->task);
+ list_del_init(&wait->node);
}
static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
+ void __user *user_points,
uint32_t count,
uint32_t flags,
signed long timeout,
@@ -659,12 +676,27 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
{
struct syncobj_wait_entry *entries;
struct dma_fence *fence;
+ uint64_t *points;
uint32_t signaled_count, i;
- entries = kcalloc(count, sizeof(*entries), GFP_KERNEL);
- if (!entries)
+ points = kmalloc_array(count, sizeof(*points), GFP_KERNEL);
+ if (points == NULL)
return -ENOMEM;
+ if (!user_points) {
+ memset(points, 0, count * sizeof(uint64_t));
+
+ } else if (copy_from_user(points, user_points,
+ sizeof(uint64_t) * count)) {
+ timeout = -EFAULT;
+ goto err_free_points;
+ }
+
+ entries = kcalloc(count, sizeof(*entries), GFP_KERNEL);
+ if (!entries) {
+ timeout = -ENOMEM;
+ goto err_free_points;
+ }
/* Walk the list of sync objects and initialize entries. We do
* this up-front so that we can properly return -EINVAL if there is
* a syncobj with a missing fence and then never have the chance of
@@ -672,9 +704,13 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
*/
signaled_count = 0;
for (i = 0; i < count; ++i) {
+ struct dma_fence *fence;
+
entries[i].task = current;
- entries[i].fence = drm_syncobj_fence_get(syncobjs[i]);
- if (!entries[i].fence) {
+ entries[i].point = points[i];
+ fence = drm_syncobj_fence_get(syncobjs[i]);
+ if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) {
+ dma_fence_put(fence);
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
continue;
} else {
@@ -683,7 +719,13 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
}
}
- if (dma_fence_is_signaled(entries[i].fence)) {
+ if (fence)
+ entries[i].fence = fence;
+ else
+ entries[i].fence = dma_fence_get_stub();
+
+ if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
+ dma_fence_is_signaled(entries[i].fence)) {
if (signaled_count == 0 && idx)
*idx = i;
signaled_count++;
@@ -716,7 +758,8 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
if (!fence)
continue;
- if (dma_fence_is_signaled(fence) ||
+ if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
+ dma_fence_is_signaled(fence) ||
(!entries[i].fence_cb.func &&
dma_fence_add_callback(fence,
&entries[i].fence_cb,
@@ -761,6 +804,9 @@ cleanup_entries:
}
kfree(entries);
+err_free_points:
+ kfree(points);
+
return timeout;
}
@@ -800,19 +846,33 @@ EXPORT_SYMBOL(drm_timeout_abs_to_jiffies);
static int drm_syncobj_array_wait(struct drm_device *dev,
struct drm_file *file_private,
struct drm_syncobj_wait *wait,
- struct drm_syncobj **syncobjs)
+ struct drm_syncobj_timeline_wait *timeline_wait,
+ struct drm_syncobj **syncobjs, bool timeline)
{
- signed long timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
+ signed long timeout = 0;
uint32_t first = ~0;
- timeout = drm_syncobj_array_wait_timeout(syncobjs,
- wait->count_handles,
- wait->flags,
- timeout, &first);
- if (timeout < 0)
- return timeout;
-
- wait->first_signaled = first;
+ if (!timeline) {
+ timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
+ timeout = drm_syncobj_array_wait_timeout(syncobjs,
+ NULL,
+ wait->count_handles,
+ wait->flags,
+ timeout, &first);
+ if (timeout < 0)
+ return timeout;
+ wait->first_signaled = first;
+ } else {
+ timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec);
+ timeout = drm_syncobj_array_wait_timeout(syncobjs,
+ u64_to_user_ptr(timeline_wait->points),
+ timeline_wait->count_handles,
+ timeline_wait->flags,
+ timeout, &first);
+ if (timeout < 0)
+ return timeout;
+ timeline_wait->first_signaled = first;
+ }
return 0;
}
@@ -898,7 +958,7 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
return ret;
ret = drm_syncobj_array_wait(dev, file_private,
- args, syncobjs);
+ args, NULL, syncobjs, false);
drm_syncobj_array_free(syncobjs, args->count_handles);
@@ -906,6 +966,41 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
}
int
+drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_timeline_wait *args = data;
+ struct drm_syncobj **syncobjs;
+ int ret = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE))
+ return -EINVAL;
+
+ if (args->count_handles == 0)
+ return -EINVAL;
+
+ ret = drm_syncobj_array_find(file_private,
+ u64_to_user_ptr(args->handles),
+ args->count_handles,
+ &syncobjs);
+ if (ret < 0)
+ return ret;
+
+ ret = drm_syncobj_array_wait(dev, file_private,
+ NULL, args, syncobjs, true);
+
+ drm_syncobj_array_free(syncobjs, args->count_handles);
+
+ return ret;
+}
+
+
+int
drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private)
{