msm: kgsl: add IOCTL_KGSL_GPUMEM_ALLOC_ID
Previously, the gpu address has been used to uniquely
identify each memory allocation. Upcoming patches will
introduce cases where an allocation does not always
have a gpu address, so an additional id is needed.
IOCTL_KGSL_GPUMEM_ALLOC_ID allocates pages and returns
an id.
IOCTL_KGSL_GPUMEM_FREE_ID frees an id. KGSL_SHAREDMEM_FREE
can still be used to free by GPU address, if it exists.
The id can also be passed to mmap(), shifted left by
PAGE_SIZE to get a CPU mapping for the buffer.
IOCTL_KGSL_GPUMEM_ALLOC_GET_INFO can be called to retrieve
the id and other information about the buffer.
Change-Id: I4b45f0660cb9d4a5fb1323ccc6c4aa360791c1ec
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_device.h b/drivers/gpu/msm/kgsl_device.h
index f6ff824..1980e9a 100644
--- a/drivers/gpu/msm/kgsl_device.h
+++ b/drivers/gpu/msm/kgsl_device.h
@@ -264,6 +264,7 @@
pid_t pid;
spinlock_t mem_lock;
struct rb_root mem_rb;
+ struct idr mem_idr;
struct kgsl_pagetable *pagetable;
struct list_head list;
struct kobject kobj;