xnu-4570.51.1.tar.gz

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

diff --git a/iokit/IOKit/IOMapper.h b/iokit/IOKit/IOMapper.h
index f59b9b0533a80ae1a811254f93533ccba2bfc6a8..4fe1ccf43fb96b1598b947a54786761ed50079d4 100644 (file)
--- a/iokit/IOKit/IOMapper.h
+++ b/iokit/IOKit/IOMapper.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2016 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -38,27 +38,28 @@ __BEGIN_DECLS
 // These are C accessors to the system mapper for non-IOKit clients
 ppnum_t IOMapperIOVMAlloc(unsigned pages);
 void IOMapperIOVMFree(ppnum_t addr, unsigned pages);
-
 ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page);
-void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset,
-                            ppnum_t *pageList, unsigned pageCount);
-void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset,
-                            upl_page_info_t *pageList, unsigned pageCount);
+
 __END_DECLS
 
 #if __cplusplus
 
 #include <IOKit/IOService.h>
 #include <IOKit/IOMemoryDescriptor.h>
+#include <IOKit/IODMACommand.h>
 
 class OSData;
 
+extern const OSSymbol * gIOMapperIDKey;
+
 class IOMapper : public IOService
 {
     OSDeclareAbstractStructors(IOMapper);
 
     // Give the platform expert access to setMapperRequired();
     friend class IOPlatformExpert;
+    friend class IOMemoryDescriptor;
+    friend class IOGeneralMemoryDescriptor;
 
 private:
     enum SystemMapperState {
@@ -68,47 +69,62 @@ private:
         kWaitMask  = 3,
     };
 protected:
-    void *fTable;
-    ppnum_t fTablePhys;
-    IOItemCount fTableSize;
-    OSData *fTableHandle;
+#ifdef XNU_KERNEL_PRIVATE
+    uint64_t   __reservedA[6];
+    kern_allocation_name_t fAllocName;
+    uint32_t   __reservedB;
+    uint32_t   fPageSize;
+#else
+    uint64_t __reserved[8];
+#endif
     bool fIsSystem;
 
-    virtual bool start(IOService *provider);
-    virtual void free();
-
     static void setMapperRequired(bool hasMapper);
     static void waitForSystemMapper();
 
     virtual bool initHardware(IOService *provider) = 0;
 
-    virtual bool allocTable(IOByteCount size);
-
 public:
-    // Static routines capable of allocating tables that are physically
-    // contiguous in real memory space.
-    static OSData * NewARTTable(IOByteCount size,
-                                void ** virtAddrP, ppnum_t *physAddrP);
-    static void FreeARTTable(OSData *handle, IOByteCount size);
-
+    virtual bool start(IOService *provider) APPLE_KEXT_OVERRIDE;
+    virtual void free() APPLE_KEXT_OVERRIDE;
 
     // To get access to the system mapper IOMapper::gSystem 
     static IOMapper *gSystem;
 
-    virtual ppnum_t iovmAlloc(IOItemCount pages) = 0;
-    virtual void iovmFree(ppnum_t addr, IOItemCount pages) = 0;
-
-    virtual void iovmInsert(ppnum_t addr, IOItemCount offset, ppnum_t page) = 0;
-    virtual void iovmInsert(ppnum_t addr, IOItemCount offset,
-                            ppnum_t *pageList, IOItemCount pageCount);
-    virtual void iovmInsert(ppnum_t addr, IOItemCount offset,
-                            upl_page_info_t *pageList, IOItemCount pageCount);
     static void checkForSystemMapper()
-        { if ((vm_address_t) gSystem & kWaitMask) waitForSystemMapper(); };
+        { if ((uintptr_t) gSystem & kWaitMask) waitForSystemMapper(); }
+
+    static IOMapper * copyMapperForDevice(IOService * device);
+    static IOMapper * copyMapperForDeviceWithIndex(IOService * device, unsigned int index);
+
+    // { subclasses
+
+    virtual uint64_t getPageSize(void) const = 0;
+
+    virtual IOReturn iovmMapMemory(IOMemoryDescriptor          * memory,
+                                  uint64_t                      descriptorOffset,
+                                  uint64_t                      length,
+                                  uint32_t                      mapOptions,
+                                  const IODMAMapSpecification * mapSpecification,
+                                  IODMACommand                * dmaCommand,
+                                  const IODMAMapPageList      * pageList,
+                                  uint64_t                    * mapAddress,
+                                  uint64_t                    * mapLength) = 0;
+
+    virtual IOReturn iovmUnmapMemory(IOMemoryDescriptor * memory, 
+                                    IODMACommand       * dmaCommand, 
+                                    uint64_t             mapAddress,
+                                    uint64_t             mapLength) = 0;
+
+    virtual IOReturn iovmInsert(uint32_t options,
+                               uint64_t mapAddress,
+                               uint64_t offset, 
+                               uint64_t physicalAddress, 
+                               uint64_t length) = 0;
+
+    virtual uint64_t mapToPhysicalAddress(uint64_t mappedAddress) = 0;
 
-    // Function will panic if the given address is not found in a valid
-    // iovm mapping.
-    virtual addr64_t mapAddr(IOPhysicalAddress addr) = 0;
+    // }
 
 private:
     OSMetaClassDeclareReservedUnused(IOMapper, 0);