xnu-2050.48.11.tar.gz

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

diff --git a/iokit/IOKit/IOMemoryDescriptor.h b/iokit/IOKit/IOMemoryDescriptor.h
index 6e6961136a1c66d78d415102df025dd372ad671b..a44ce6f40cb6da6e43a9734fc4a071de7b3d9a94 100644 (file)
--- a/iokit/IOKit/IOMemoryDescriptor.h
+++ b/iokit/IOKit/IOMemoryDescriptor.h
@@ -38,6 +38,7 @@
 
 class IOMemoryMap;
 class IOMapper;
+class IOService;
 
 /*
  * Direction of transfer, with respect to the described memory.
@@ -83,7 +84,8 @@ enum {
 
     kIOMemoryAsReference       = 0x00000100,
     kIOMemoryBufferPageable    = 0x00000400,
-    kIOMemoryMapperNone                = 0x00000800,
+    kIOMemoryMapperNone                = 0x00000800,   // Shared with Buffer MD
+    kIOMemoryHostOnly           = 0x00001000,   // Never DMA accessible
 #ifdef XNU_KERNEL_PRIVATE
     kIOMemoryRedirected                = 0x00004000,
     kIOMemoryPreparedReadOnly  = 0x00008000,
@@ -116,6 +118,26 @@ enum
 
 #define        IOMEMORYDESCRIPTOR_SUPPORTS_DMACOMMAND  1
 
+struct IODMAMapSpecification
+{
+       uint64_t    alignment;
+       IOService * device;
+       uint32_t    options;
+       uint8_t     numAddressBits;
+       uint8_t     resvA[3];
+       uint32_t    resvB[4];
+};
+
+enum
+{
+    kIODMAMapWriteAccess          = 0x00000002,
+    kIODMAMapPhysicallyContiguous = 0x00000010,
+    kIODMAMapDeviceMemory         = 0x00000020,
+    kIODMAMapPagingPath           = 0x00000040,
+    kIODMAMapIdentityMap          = 0x00000080,
+};
+
+
 enum 
 {
     kIOPreparationIDUnprepared = 0,
@@ -134,19 +156,10 @@ class IOMemoryDescriptor : public OSObject
     OSDeclareDefaultStructors(IOMemoryDescriptor);
 
 protected:
-/*! @struct ExpansionData
-    @discussion This structure will be used to expand the capablilties of this class in the future.
-    */    
-    struct ExpansionData {
-        void *                         devicePager;
-        unsigned int                   pagerContig:1;
-        unsigned int                   unused:31;
-       IOMemoryDescriptor *            memory;
-    };
 
 /*! @var reserved
     Reserved for future use.  (Internal use only)  */
-    ExpansionData * reserved;
+    struct IOMemoryDescriptorReserved * reserved;
 
 protected:
     OSSet *            _mappings;
@@ -238,6 +251,18 @@ typedef IOOptionBits DMACommandOps;
 #endif /* !__LP64__ */
 
     virtual uint64_t getPreparationID( void );
+    void             setPreparationID( void );
+
+#ifdef XNU_KERNEL_PRIVATE
+    IOMemoryDescriptorReserved * getKernelReserved( void );
+    IOReturn dmaMap(
+       IOMapper                    * mapper,
+       const IODMAMapSpecification * mapSpec,
+       uint64_t                      offset,
+       uint64_t                      length,
+       uint64_t                    * address,
+       ppnum_t                     * mapPages);
+#endif
        
 private:
     OSMetaClassDeclareReservedUsed(IOMemoryDescriptor, 0);
@@ -767,6 +792,11 @@ public:
     IOReturn userClientUnmap();
 #endif /* XNU_KERNEL_PRIVATE */
 
+    IOReturn wireRange(
+       uint32_t                options,
+        mach_vm_size_t         offset,
+        mach_vm_size_t         length);
+
     OSMetaClassDeclareReservedUnused(IOMemoryMap, 0);
     OSMetaClassDeclareReservedUnused(IOMemoryMap, 1);
     OSMetaClassDeclareReservedUnused(IOMemoryMap, 2);
@@ -834,6 +864,19 @@ public:
 
     virtual uint64_t getPreparationID( void );
 
+#ifdef XNU_KERNEL_PRIVATE
+    // Internal APIs may be made virtual at some time in the future.
+    IOReturn wireVirtual(IODirection forDirection);
+    IOReturn dmaMap(
+       IOMapper                    * mapper,
+       const IODMAMapSpecification * mapSpec,
+       uint64_t                      offset,
+       uint64_t                      length,
+       uint64_t                    * address,
+       ppnum_t                     * mapPages);
+    bool initMemoryEntries(size_t size, IOMapper * mapper);
+#endif
+
 private:
 
 #ifndef __LP64__
@@ -842,8 +885,6 @@ private:
     virtual void unmapFromKernel();
 #endif /* !__LP64__ */
 
-    // Internal APIs may be made virtual at some time in the future.
-    IOReturn wireVirtual(IODirection forDirection);
     void *createNamedEntry();
 
     // Internal