xnu-4570.51.1.tar.gz

[apple/xnu.git] / iokit / IOKit / IOMemoryDescriptor.h

diff --git a/iokit/IOKit/IOMemoryDescriptor.h b/iokit/IOKit/IOMemoryDescriptor.h
index c284aaa1224bc201380a288000ac8910a22b6612..35c3305816d0fa46e8fa86ec655b0007d3c81ff9 100644 (file)
--- a/iokit/IOKit/IOMemoryDescriptor.h
+++ b/iokit/IOKit/IOMemoryDescriptor.h
@@ -73,18 +73,6 @@ enum IODirection
      kIODirectionCompleteWithDataValid = 0x00000080,
 };
 
-
-#if XNU_KERNEL_PRIVATE
-enum
-{
-     // prepare/complete() notify DMA command active
-    kIODirectionDMACommand         = 0x00000100,
-    kIODirectionDMACommandMask     = 0x0001FE00,
-    kIODirectionDMACommandShift    = 9,
-};
-#endif
-
-
 #ifdef __LP64__
 typedef IOOptionBits IODirection;
 #endif /* __LP64__ */
@@ -124,6 +112,7 @@ enum {
 #ifdef XNU_KERNEL_PRIVATE
     kIOMemoryMapCopyOnWrite    = 0x00020000,
 #endif
+    kIOMemoryRemote            = 0x00040000,
     kIOMemoryThreadSafe                = 0x00100000,   // Shared with Buffer MD
     kIOMemoryClearEncrypt      = 0x00200000,   // Shared with Buffer MD
     kIOMemoryUseReserve        = 0x00800000,   // Shared with Buffer MD
@@ -217,6 +206,7 @@ enum  {
     kIOMDSetDMAInactive           = kIOMDDMAActive,
     kIOMDAddDMAMapSpec            = 0x04000000,
     kIOMDDMAMap                   = 0x05000000,
+    kIOMDDMAUnmap                 = 0x06000000,
     kIOMDDMACommandOperationMask  = 0xFF000000,
 };
 struct IOMDDMACharacteristics {
@@ -244,8 +234,14 @@ struct IOMDDMAWalkSegmentArgs {
     UInt64 fOffset;                    // Input/Output offset
     UInt64 fIOVMAddr, fLength;         // Output variables
     UInt8 fMapped;                     // Input Variable, Require mapped IOVMA
+    UInt64 fMappedBase;                        // Input base of mapping
 };
 typedef UInt8 IOMDDMAWalkSegmentState[128];
+// fMapped:
+enum
+{
+       kIOMDDMAWalkMappedLocal = 2
+};
 
 #endif /* KERNEL_PRIVATE */
 
@@ -286,17 +282,22 @@ protected:
 #ifdef XNU_KERNEL_PRIVATE
 public:
     struct IOMemoryReference * _memRef;
+    vm_tag_t _kernelTag;
+    vm_tag_t _userTag;
+    int16_t _dmaReferences;
+    uint16_t _internalFlags;
+    kern_allocation_name_t _mapName;
 protected:
-#else
-    void * __iomd_reserved5;
-#endif
+#else /* XNU_KERNEL_PRIVATE */
+    void *             __iomd_reserved5;
+    uint16_t           __iomd_reserved1[4];
+    uintptr_t          __iomd_reserved2;
+#endif /* XNU_KERNEL_PRIVATE */
 
-#ifdef __LP64__
-    uint64_t           __iomd_reserved1;
-    uint64_t           __iomd_reserved2;
-    uint64_t           __iomd_reserved3;
-    uint64_t           __iomd_reserved4;
-#else /* !__LP64__ */
+    uintptr_t          __iomd_reserved3;
+    uintptr_t          __iomd_reserved4;
+
+#ifndef __LP64__
     IODirection         _direction;        /* use _flags instead */
 #endif /* !__LP64__ */
     IOByteCount         _length;           /* length of all ranges */
@@ -399,6 +400,16 @@ typedef IOOptionBits DMACommandOps;
        uint64_t                      length,
        uint64_t                    * mapAddress,
        uint64_t                    * mapLength);
+    IOReturn dmaUnmap(
+       IOMapper                    * mapper,
+       IODMACommand                * command,
+       uint64_t                      offset,
+       uint64_t                      mapAddress,
+       uint64_t                      mapLength);
+    void dmaMapRecord(
+       IOMapper                    * mapper,
+       IODMACommand                * command,
+       uint64_t                      mapLength);
 
     void     setVMTags(vm_tag_t kernelTag, vm_tag_t userTag);
     vm_tag_t getVMTag(vm_map_t map);
@@ -617,6 +628,13 @@ public:
 
     virtual IOOptionBits getTag( void );
 
+/*! @function getFlags
+    @abstract Accessor to the retrieve the options the memory descriptor was created with.
+    @discussion Accessor to the retrieve the options the memory descriptor was created with, and flags with its state. These bits are defined by the kIOMemory* enum.
+    @result The flags bitfield. */
+
+    uint64_t getFlags(void);
+
 /*! @function readBytes
     @abstract Copy data from the memory descriptor's buffer to the specified buffer.
     @discussion This method copies data from the memory descriptor's memory at the given offset, to the caller's buffer.  The memory descriptor MUST have the kIODirectionOut direcction bit set  and be prepared.  kIODirectionOut means that this memory descriptor will be output to an external device, so readBytes is used to get memory into a local buffer for a PIO transfer to the device.