From: Rob Clark <robdclark@xxxxxxxxxxxx>
In cases where implicit sync is used, it is still useful (for things
like sub-allocation, etc) to allow userspace to opt-out of implicit
sync on per-BO basis.
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
drivers/gpu/drm/msm/msm_drv.c | 3 ++-
drivers/gpu/drm/msm/msm_gem_submit.c | 11 +++++++++++
include/uapi/drm/msm_drm.h | 4 +++-
3 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 017a512982a2..e0e1199a822f 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -45,9 +45,10 @@
* - 1.7.0 - Add MSM_PARAM_SUSPENDS to access suspend count
* - 1.8.0 - Add MSM_BO_CACHED_COHERENT for supported GPUs (a6xx)
* - 1.9.0 - Add MSM_SUBMIT_FENCE_SN_IN
+ * - 1.10.0 - Add MSM_SUBMIT_BO_NO_IMPLICIT
*/
#define MSM_VERSION_MAJOR 1
-#define MSM_VERSION_MINOR 9
+#define MSM_VERSION_MINOR 10
#define MSM_VERSION_PATCHLEVEL 0
static const struct drm_mode_config_funcs mode_config_funcs = {
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index eb3536e3d66a..8bad07a04f85 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -334,9 +334,20 @@ static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
if (ret)
return ret;
+ /* If userspace has determined that explicit fencing is
+ * used, it can disable implicit sync on the entire
+ * submit:
+ */
if (no_implicit)
continue;
+ /* Otherwise userspace can ask for implicit sync to be
+ * disabled on specific buffers. This is useful for internal
+ * usermode driver managed buffers, suballocation, etc.
+ */
+ if (submit->bos[i].flags & MSM_SUBMIT_BO_NO_IMPLICIT)
+ continue;
+
ret = drm_sched_job_add_implicit_dependencies(&submit->base,
obj,
write);
diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
index f54b48ef6a2d..329100016e7c 100644
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -222,10 +222,12 @@ struct drm_msm_gem_submit_cmd {
#define MSM_SUBMIT_BO_READ 0x0001
#define MSM_SUBMIT_BO_WRITE 0x0002
#define MSM_SUBMIT_BO_DUMP 0x0004
+#define MSM_SUBMIT_BO_NO_IMPLICIT 0x0008
#define MSM_SUBMIT_BO_FLAGS (MSM_SUBMIT_BO_READ | \
MSM_SUBMIT_BO_WRITE | \
- MSM_SUBMIT_BO_DUMP)
+ MSM_SUBMIT_BO_DUMP | \
+ MSM_SUBMIT_BO_NO_IMPLICIT)
struct drm_msm_gem_submit_bo {
__u32 flags; /* in, mask of MSM_SUBMIT_BO_x */
--
2.38.1
