text: #ifndef _UAPI_MSM_ION_H
  #define _UAPI_MSM_ION_H
  
  #include "ion.h"
  
  enum msm_ion_heap_types {
  	ION_HEAP_TYPE_MSM_START = ION_HEAP_TYPE_CUSTOM + 1,
  	ION_HEAP_TYPE_SECURE_DMA = ION_HEAP_TYPE_MSM_START,
  	ION_HEAP_TYPE_REMOVED,
  	/*
  	 * if you add a heap type here you should also add it to
  	 * heap_types_info[] in msm_ion.c
  	 */
  };
  
  /**
   * These are the only ids that should be used for Ion heap ids.
   * The ids listed are the order in which allocation will be attempted
   * if specified. Don't swap the order of heap ids unless you know what
   * you are doing!
   * Id's are spaced by purpose to allow new Id's to be inserted in-between (for
   * possible fallbacks)
   */
  
  enum ion_heap_ids {
  	INVALID_HEAP_ID = -1,
  	ION_CP_MM_HEAP_ID = 8,
  	ION_SECURE_HEAP_ID = 9,
  	ION_CP_MFC_HEAP_ID = 12,
  	ION_CP_WB_HEAP_ID = 16, /* 8660 only */
  	ION_CAMERA_HEAP_ID = 20, /* 8660 only */
  	ION_SYSTEM_CONTIG_HEAP_ID = 21,
  	ION_ADSP_HEAP_ID = 22,
  	ION_PIL1_HEAP_ID = 23, /* Currently used for other PIL images */
  	ION_SF_HEAP_ID = 24,
  	ION_SYSTEM_HEAP_ID = 25,
  	ION_PIL2_HEAP_ID = 26, /* Currently used for modem firmware images */
  	ION_QSECOM_HEAP_ID = 27,
  	ION_AUDIO_HEAP_ID = 28,
  
  	ION_MM_FIRMWARE_HEAP_ID = 29,
  
  	ION_HEAP_ID_RESERVED = 31 /** Bit reserved for ION_FLAG_SECURE flag */
  };
  
  /*
   * The IOMMU heap is deprecated! Here are some aliases for backwards
   * compatibility:
   */
  #define ION_IOMMU_HEAP_ID ION_SYSTEM_HEAP_ID
  #define ION_HEAP_TYPE_IOMMU ION_HEAP_TYPE_SYSTEM
  
  enum ion_fixed_position {
  	NOT_FIXED,
  	FIXED_LOW,
  	FIXED_MIDDLE,
  	FIXED_HIGH,
  };
  
  enum cp_mem_usage {
  	VIDEO_BITSTREAM = 0x1,
  	VIDEO_PIXEL = 0x2,
  	VIDEO_NONPIXEL = 0x3,
  	DISPLAY_SECURE_CP_USAGE = 0x4,
  	CAMERA_SECURE_CP_USAGE = 0x5,
  	MAX_USAGE = 0x6,
  	UNKNOWN = 0x7FFFFFFF,
  };
  
  /**
   * Flags to be used when allocating from the secure heap for
   * content protection
   */
  #define ION_FLAG_CP_TOUCH (1 << 17)
  #define ION_FLAG_CP_BITSTREAM (1 << 18)
  #define ION_FLAG_CP_PIXEL  (1 << 19)
  #define ION_FLAG_CP_NON_PIXEL (1 << 20)
  #define ION_FLAG_CP_CAMERA (1 << 21)
  #define ION_FLAG_CP_HLOS (1 << 22)
  #define ION_FLAG_CP_HLOS_FREE (1 << 23)
  #define ION_FLAG_CP_SEC_DISPLAY (1 << 25)
  #define ION_FLAG_CP_APP (1 << 26)
  
  /**
   * Flag to allow non continguous allocation of memory from secure
   * heap
   */
  #define ION_FLAG_ALLOW_NON_CONTIG (1 << 24)
  
  /**
   * Flag to use when allocating to indicate that a heap is secure.
   */
  #define ION_FLAG_SECURE (1 << ION_HEAP_ID_RESERVED)
  
  /**
   * Flag for clients to force contiguous memort allocation
   *
   * Use of this flag is carefully monitored!
   */
  #define ION_FLAG_FORCE_CONTIGUOUS (1 << 30)
  
  /*
   * Used in conjunction with heap which pool memory to force an allocation
   * to come from the page allocator directly instead of from the pool allocation
   */
  #define ION_FLAG_POOL_FORCE_ALLOC (1 << 16)
  
  /**
  * Deprecated! Please use the corresponding ION_FLAG_*
  */
  #define ION_SECURE ION_FLAG_SECURE
  #define ION_FORCE_CONTIGUOUS ION_FLAG_FORCE_CONTIGUOUS
  
  /**
   * Macro should be used with ion_heap_ids defined above.
   */
  #define ION_HEAP(bit) (1 << (bit))
  
  #define ION_ADSP_HEAP_NAME	"adsp"
  #define ION_SYSTEM_HEAP_NAME	"system"
  #define ION_VMALLOC_HEAP_NAME	ION_SYSTEM_HEAP_NAME
  #define ION_KMALLOC_HEAP_NAME	"kmalloc"
  #define ION_AUDIO_HEAP_NAME	"audio"
  #define ION_SF_HEAP_NAME	"sf"
  #define ION_MM_HEAP_NAME	"mm"
  #define ION_CAMERA_HEAP_NAME	"camera_preview"
  #define ION_IOMMU_HEAP_NAME	"iommu"
  #define ION_MFC_HEAP_NAME	"mfc"
  #define ION_WB_HEAP_NAME	"wb"
  #define ION_MM_FIRMWARE_HEAP_NAME	"mm_fw"
  #define ION_PIL1_HEAP_NAME  "pil_1"
  #define ION_PIL2_HEAP_NAME  "pil_2"
  #define ION_SECURE_HEAP_NAME	"secure_heap"
  #define ION_QSECOM_HEAP_NAME	"qsecom"
  
  #define ION_SET_CACHED(__cache)		(__cache | ION_FLAG_CACHED)
  #define ION_SET_UNCACHED(__cache)	(__cache & ~ION_FLAG_CACHED)
  
  #define ION_IS_CACHED(__flags)	((__flags) & ION_FLAG_CACHED)
  
  /* struct ion_flush_data - data passed to ion for flushing caches
   *
   * @handle:	handle with data to flush
   * @fd:		fd to flush
   * @vaddr:	userspace virtual address mapped with mmap
   * @offset:	offset into the handle to flush
   * @length:	length of handle to flush
   *
   * Performs cache operations on the handle. If p is the start address
   * of the handle, p + offset through p + offset + length will have
   * the cache operations performed
   */
  struct ion_flush_data {
  	ion_user_handle_t handle;
  	int fd;
  	void *vaddr;
  	unsigned int offset;
  	unsigned int length;
  };
  
  
  struct ion_prefetch_data {
  	int heap_id;
  	unsigned long len;
  };
  
  #define ION_IOC_MSM_MAGIC 'M'
  
  /**
   * DOC: ION_IOC_CLEAN_CACHES - clean the caches
   *
   * Clean the caches of the handle specified.
   */
  #define ION_IOC_CLEAN_CACHES	_IOWR(ION_IOC_MSM_MAGIC, 0, \
  						struct ion_flush_data)
  /**
   * DOC: ION_IOC_INV_CACHES - invalidate the caches
   *
   * Invalidate the caches of the handle specified.
   */
  #define ION_IOC_INV_CACHES	_IOWR(ION_IOC_MSM_MAGIC, 1, \
  						struct ion_flush_data)
  /**
   * DOC: ION_IOC_CLEAN_INV_CACHES - clean and invalidate the caches
   *
   * Clean and invalidate the caches of the handle specified.
   */
  #define ION_IOC_CLEAN_INV_CACHES	_IOWR(ION_IOC_MSM_MAGIC, 2, \
  						struct ion_flush_data)
  
  #define ION_IOC_PREFETCH		_IOWR(ION_IOC_MSM_MAGIC, 3, \
  						struct ion_prefetch_data)
  
  #define ION_IOC_DRAIN			_IOWR(ION_IOC_MSM_MAGIC, 4, \
  						struct ion_prefetch_data)
  
  #endif
  