msm: kgsl: Add support for Android's sync point framework
The Android sync point framework will replace the synchronization
previously implemented by genlock. This change implements the KGSL
component of the sync point framework by creating a fence that is
automatically signaled by KGSL when it's timestamp expires. The
fence FD is returned to the user driver so that another process
can wait for the sync point.
Change-Id: Ifee38dfde00e551f3524f7a37833938dcdb64905
Signed-off-by: Jeff Boody <jboody@codeaurora.org>
diff --git a/include/linux/msm_kgsl.h b/include/linux/msm_kgsl.h
index 7afc896..c8ea7e5 100644
--- a/include/linux/msm_kgsl.h
+++ b/include/linux/msm_kgsl.h
@@ -2,7 +2,7 @@
#define _MSM_KGSL_H
#define KGSL_VERSION_MAJOR 3
-#define KGSL_VERSION_MINOR 11
+#define KGSL_VERSION_MINOR 12
/*context flags */
#define KGSL_CONTEXT_SAVE_GMEM 0x00000001
@@ -426,7 +426,8 @@
/*
* A timestamp event allows the user space to register an action following an
- * expired timestamp.
+ * expired timestamp. Note IOCTL_KGSL_TIMESTAMP_EVENT has been redefined to
+ * _IOWR to support fences which need to return a fd for the priv parameter.
*/
struct kgsl_timestamp_event {
@@ -437,7 +438,7 @@
size_t len; /* Size of the event specific blob */
};
-#define IOCTL_KGSL_TIMESTAMP_EVENT \
+#define IOCTL_KGSL_TIMESTAMP_EVENT_OLD \
_IOW(KGSL_IOC_TYPE, 0x31, struct kgsl_timestamp_event)
/* A genlock timestamp event releases an existing lock on timestamp expire */
@@ -448,6 +449,14 @@
int handle; /* Handle of the genlock lock to release */
};
+/* A fence timestamp event releases an existing lock on timestamp expire */
+
+#define KGSL_TIMESTAMP_EVENT_FENCE 2
+
+struct kgsl_timestamp_event_fence {
+ int fence_fd; /* Fence to signal */
+};
+
/*
* Set a property within the kernel. Uses the same structure as
* IOCTL_KGSL_GETPROPERTY
@@ -456,6 +465,9 @@
#define IOCTL_KGSL_SETPROPERTY \
_IOW(KGSL_IOC_TYPE, 0x32, struct kgsl_device_getproperty)
+#define IOCTL_KGSL_TIMESTAMP_EVENT \
+ _IOWR(KGSL_IOC_TYPE, 0x33, struct kgsl_timestamp_event)
+
#ifdef __KERNEL__
#ifdef CONFIG_MSM_KGSL_DRM
int kgsl_gem_obj_addr(int drm_fd, int handle, unsigned long *start,