[PATCH 09/10] drm/syncobj: add timeline signal ioctl for syncobj v2

Chunming Zhou
2018-12-07T15:54:21Z

v2: individually allocate chain array, since chain node is free independently.

Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
---
drivers/gpu/drm/drm_internal.h | 2 +
drivers/gpu/drm/drm_ioctl.c | 2 +
drivers/gpu/drm/drm_syncobj.c | 81 ++++++++++++++++++++++++++++++++++
include/uapi/drm/drm.h | 1 +
4 files changed, 86 insertions(+)

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 06c2adc4950e..d7a19bd89cb2 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -186,6 +186,8 @@ 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,
struct drm_file *file_private);
+int drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index e9d4bed12783..a50dc62dc87b 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -683,6 +683,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL, drm_syncobj_timeline_signal_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_QUERY, drm_syncobj_query_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE, drm_crtc_get_sequence_ioctl, DRM_UNLOCKED),
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 82f0ab96813e..84a52da5ed7b 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -1178,6 +1178,87 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
return ret;
}

+int
+drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_timeline_array *args = data;
+ struct drm_syncobj **syncobjs;
+ struct dma_fence_chain **chains;
+ uint64_t *points;
+ uint32_t i, j, timeline_count = 0;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -EOPNOTSUPP;
+
+ if (args->pad != 0)
+ 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;
+
+ points = kmalloc_array(args->count_handles, sizeof(*points),
+ GFP_KERNEL);
+ if (!points) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (!u64_to_user_ptr(args->points)) {
+ memset(points, 0, args->count_handles * sizeof(uint64_t));
+ } else if (copy_from_user(points, u64_to_user_ptr(args->points),
+ sizeof(uint64_t) * args->count_handles)) {
+ ret = -EFAULT;
+ goto err_points;
+ }
+
+
+ for (i = 0; i < args->count_handles; i++) {
+ if (points[i])
+ timeline_count++;
+ }
+ chains = kmalloc_array(timeline_count, sizeof(void *), GFP_KERNEL);
+ if (!chains) {
+ ret = -ENOMEM;
+ goto err_points;
+ }
+ for (i = 0; i < timeline_count; i++) {
+ chains[i] = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
+ if (!chains[i]) {
+ for (j = 0; j < i; j++)
+ kfree(chains[j]);
+ ret = -ENOMEM;
+ goto err_chains;
+ }
+ }
+
+ for (i = 0, j = 0; i < args->count_handles; i++) {
+ if (points[i]) {
+ struct dma_fence *fence = dma_fence_get_stub();
+
+ drm_syncobj_add_point(syncobjs[i], chains[j++],
+ fence, points[i]);
+ dma_fence_put(fence);
+ } else
+ drm_syncobj_assign_null_handle(syncobjs[i]);
+ }
+err_chains:
+ kfree(chains);
+err_points:
+ kfree(points);
+out:
+ drm_syncobj_array_free(syncobjs, args->count_handles);
+
+ return ret;
+}
+
int drm_syncobj_query_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 4c1e2e6579fa..fe00b74268eb 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -943,6 +943,7 @@ extern "C" {
#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
#define DRM_IOCTL_SYNCOBJ_QUERY DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
#define DRM_IOCTL_SYNCOBJ_TRANSFER DRM_IOWR(0xCC, struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL DRM_IOWR(0xCD, struct drm_syncobj_timeline_array)

/**
* Device specific ioctls should only be in their respective headers
--
2.17.1

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