ENGR00325794 [#1087] fix video memory mutex sharing issue

the root cause is video memory mutex is not global variable,
it will cause video memory managment problem with mixed 2D/3D/VG.

kernel panic with multiple instances stress test running glesx_viv.sh.

Date: Jul 31, 2014
Signed-off-by: Xianzhong <b07117@freescale.com>
Acked-by: Jason Liu
(cherry picked from commit 6bdcb506755778501374bdb3f598af71c95a7676)

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c b/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
index 470325c98098..9d6f4fe582ed 100644
--- a/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
+++ b/drivers/mxc/gpu-viv/hal/os/linux/kernel/gc_hal_kernel_os.c
@@ -917,6 +917,9 @@ gckOS_Construct(
 
     gckOS_ImportAllocators(os);
 
+    /* Construct a video memory mutex. */
+    gcmkONERROR(gckOS_CreateMutex(os, &os->vidmemMutex));
+
     /* Return pointer to the gckOS object. */
     *Os = os;
 
@@ -1029,6 +1032,9 @@ gckOS_Destroy(
     /* Destroy debug lock mutex. */
     gcmkVERIFY_OK(gckOS_DeleteMutex(Os, Os->debugLock));
 
+    /* Destroy video memory mutex. */
+    gcmkVERIFY_OK(gckOS_DeleteMutex(Os, Os->vidmemMutex));
+
     /* Wait for all works done. */
     flush_workqueue(Os->workqueue);
 
@@ -9035,3 +9041,16 @@ gckOS_GPUPhysicalToCPUPhysical(
     return gcvSTATUS_OK;
 }
 
+gceSTATUS
+gckOS_GetVideoMemoryMutex(
+    IN gckOS Os,
+    OUT gctPOINTER *Mutex
+    )
+{
+    gcmkHEADER_ARG("Mutex=x%X", Mutex);
+
+    *Mutex = Os->vidmemMutex;
+
+    gcmkFOOTER_NO();
+    return gcvSTATUS_OK;
+}