Am 02.11.18 um 09:25 schrieb Chunming Zhou:
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
Signed-off-by: Chunming Zhou <david1.zhou@xxxxxxx>
Cc: Daniel Rakos <Daniel.Rakos@xxxxxxx>
Cc: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
Cc: Bas Nieuwenhuizen <bas@xxxxxxxxxxxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_internal.h | 2 +
drivers/gpu/drm/drm_ioctl.c | 2 +
drivers/gpu/drm/drm_syncobj.c | 115 ++++++++++++++++++++++++++++-----
include/uapi/drm/drm.h | 18 ++++++
4 files changed, 121 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 0c4eb4a9ab31..566d44e3c782 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -183,6 +183,8 @@ int drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 94bd872d56c4..a9a17ed35cc4 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -675,6 +675,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_WAIT, drm_syncobj_wait_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, drm_syncobj_timeline_wait_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_RESET, drm_syncobj_reset_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 4dca5f7e8c4b..9dc54a345480 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -153,11 +153,12 @@ static void drm_syncobj_add_callback_locked(struct drm_syncobj *syncobj,
}
static void drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj,
+ uint64_t point,
struct dma_fence **fence,
struct drm_syncobj_cb *cb,
drm_syncobj_func_t func)
{
- u64 pt_value = 0;
+ u64 pt_value = point;
WARN_ON(*fence);
@@ -854,6 +855,7 @@ struct syncobj_wait_entry {
struct dma_fence *fence;
struct dma_fence_cb fence_cb;
struct drm_syncobj_cb syncobj_cb;
+ u64 point;
};
static void syncobj_wait_fence_func(struct dma_fence *fence,
@@ -871,12 +873,13 @@ static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait =
container_of(cb, struct syncobj_wait_entry, syncobj_cb);
- drm_syncobj_search_fence(syncobj, 0, 0, &wait->fence);
+ drm_syncobj_search_fence(syncobj, wait->point, 0, &wait->fence);
wake_up_process(wait->task);
}
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,
@@ -884,12 +887,37 @@ 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;
+ }
+
+
Double empty line here.
+ if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) {
+ struct dma_fence *fence;
+ for (i = 0; i < count; ++i) {
+ timeout = drm_syncobj_search_fence(syncobjs[i], points[i],
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT,
+ &fence);
+ if (timeout)
+ goto err_free_points;
+ }
+ goto err_free_points;
A comment would be nice here to note that we only wait for the fences to
become available.
Alternatively it might be a good idea to make this an separate IOCTL.
Apart from those nit picks looks quite good to me,
Christian.
+ }
+ 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
@@ -898,7 +926,8 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
signaled_count = 0;
for (i = 0; i < count; ++i) {
entries[i].task = current;
- drm_syncobj_search_fence(syncobjs[i], 0, 0,
+ entries[i].point = points[i];
+ drm_syncobj_search_fence(syncobjs[i], points[i], 0,
&entries[i].fence);
if (!entries[i].fence) {
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
@@ -934,6 +963,7 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
continue;
drm_syncobj_fence_get_or_add_callback(syncobjs[i],
+ entries[i].point,
&entries[i].fence,
&entries[i].syncobj_cb,
syncobj_wait_syncobj_func);
@@ -996,6 +1026,9 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
}
kfree(entries);
+err_free_points:
+ kfree(points);
+
return timeout;
}
@@ -1034,19 +1067,33 @@ static signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec)
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;
}
@@ -1132,13 +1179,49 @@ 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);
return ret;
}
+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_COMPLETED |
+ 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)
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index cebdb2541eb7..c8bc1414753d 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -738,6 +738,10 @@ struct drm_syncobj_handle {
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1)
+/* wait for time point to be completed */
+#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_COMPLETED (1 << 2)
+/* wait for time point to become available */
+#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 << 3)
struct drm_syncobj_wait {
__u64 handles;
/* absolute timeout */
@@ -748,6 +752,19 @@ struct drm_syncobj_wait {
__u32 pad;
};
+struct drm_syncobj_timeline_wait {
+ __u64 handles;
+ /* wait on specific timeline point for every handles*/
+ __u64 points;
+ /* absolute timeout */
+ __s64 timeout_nsec;
+ __u32 count_handles;
+ __u32 flags;
+ __u32 first_signaled; /* only valid when not waiting all */
+ __u32 pad;
+};
+
+
struct drm_syncobj_array {
__u64 handles;
__u32 count_handles;
@@ -910,6 +927,7 @@ extern "C" {
#define DRM_IOCTL_MODE_GET_LEASE DRM_IOWR(0xC8, struct drm_mode_get_lease)
#define DRM_IOCTL_MODE_REVOKE_LEASE DRM_IOWR(0xC9, struct drm_mode_revoke_lease)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
/**
* Device specific ioctls should only be in their respective headers
* The device specific ioctl range is from 0x40 to 0x9f.
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