Allow userland to specify a syncobj that is waited on before a render job
starts processing.
Signed-off-by: Stefan Schake <stsch...@gmail.com>
---
drivers/gpu/drm/vc4/vc4_drv.h | 2 ++
drivers/gpu/drm/vc4/vc4_gem.c | 33 +++++++++++++++++++++++++++------
include/uapi/drm/vc4_drm.h | 9 +++++----
3 files changed, 34 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 4288615b66a2..3105df99cb12 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -10,6 +10,8 @@
#include <drm/drmP.h>
#include <drm/drm_encoder.h>
#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_syncobj.h>
+
#include "uapi/drm/vc4_drm.h"
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 2107b0daf8ef..232363488125 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -27,6 +27,7 @@
#include <linux/device.h>
#include <linux/io.h>
#include <linux/sched/signal.h>
+#include <linux/dma-fence-array.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
@@ -1115,21 +1116,18 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_vc4_submit_cl *args = data;
struct vc4_exec_info *exec;
struct ww_acquire_ctx acquire_ctx;
+ struct dma_fence *in_fence;
int ret = 0;
if ((args->flags & ~(VC4_SUBMIT_CL_USE_CLEAR_COLOR |
VC4_SUBMIT_CL_FIXED_RCL_ORDER |
VC4_SUBMIT_CL_RCL_ORDER_INCREASING_X |
- VC4_SUBMIT_CL_RCL_ORDER_INCREASING_Y)) != 0) {
+ VC4_SUBMIT_CL_RCL_ORDER_INCREASING_Y |
+ VC4_SUBMIT_CL_IMPORT_SYNCOBJ)) != 0) {
DRM_DEBUG("Unknown flags: 0x%02x\n", args->flags);
return -EINVAL;
}
- if (args->pad2 != 0) {
- DRM_DEBUG("->pad2 must be set to zero\n");
- return -EINVAL;
- }
-
exec = kcalloc(1, sizeof(*exec), GFP_KERNEL);
if (!exec) {
DRM_ERROR("malloc failure on exec struct\n");
@@ -1164,6 +1162,29 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
}
}
+ if (args->flags & VC4_SUBMIT_CL_IMPORT_SYNCOBJ) {
+ ret = drm_syncobj_find_fence(file_priv, args->in_sync,
+ &in_fence);
+ if (ret)
+ goto fail;
+
+ /* When the fence (or fence array) is exclusively from our
+ * context we can skip the wait since jobs are executed in
+ * order of their submission through this ioctl and this can
+ * only have fences from a prior job.
+ */
+ if (!dma_fence_match_context(in_fence,
+ vc4->dma_fence_context)) {
+ ret = dma_fence_wait(in_fence, true);
+ if (ret) {
+ dma_fence_put(in_fence);
+ goto fail;
+ }
+ }
+
+ dma_fence_put(in_fence);
+ }
+
if (exec->args->bin_cl_size != 0) {
ret = vc4_get_bcl(dev, exec);
if (ret)
diff --git a/include/uapi/drm/vc4_drm.h b/include/uapi/drm/vc4_drm.h
index b95a0e11cb07..389f21931c25 100644
--- a/include/uapi/drm/vc4_drm.h
+++ b/include/uapi/drm/vc4_drm.h
@@ -173,6 +173,7 @@ struct drm_vc4_submit_cl {
#define VC4_SUBMIT_CL_FIXED_RCL_ORDER (1 << 1)
#define VC4_SUBMIT_CL_RCL_ORDER_INCREASING_X (1 << 2)
#define VC4_SUBMIT_CL_RCL_ORDER_INCREASING_Y (1 << 3)
+#define VC4_SUBMIT_CL_IMPORT_SYNCOBJ (1 << 4)
__u32 flags;
/* Returned value of the seqno of this render job (for the
@@ -183,11 +184,11 @@ struct drm_vc4_submit_cl {
/* ID of the perfmon to attach to this job. 0 means no perfmon. */
__u32 perfmonid;
- /* Unused field to align this struct on 64 bits. Must be set to 0.
- * If one ever needs to add an u32 field to this struct, this field
- * can be used.
+ /* Syncobj handle to wait on. Set together with IMPORT_SYNCOBJ flag.
+ * If set, processing of this render job will not start until the
+ * syncobj is signalled.
*/
- __u32 pad2;
+ __u32 in_sync;
};
/**
--
2.14.1
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