xnu-792.25.20.tar.gz

[apple/xnu.git] / iokit / Kernel / IOMapper.cpp

diff --git a/iokit/Kernel/IOMapper.cpp b/iokit/Kernel/IOMapper.cpp
index f9be2591553576e46775a756bb992a8aa6572bb2..f2f0633c3f96ff865e5059fe3e498951c224ac1c 100644 (file)
--- a/iokit/Kernel/IOMapper.cpp
+++ b/iokit/Kernel/IOMapper.cpp
@@ -23,10 +23,16 @@
 #include <IOKit/IOMapper.h>
 #include <libkern/c++/OSData.h>
 
+#include "IOCopyMapper.h"
+
+__BEGIN_DECLS
+extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
+__END_DECLS
+
 #define super IOService
 OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
 
-OSMetaClassDefineReservedUnused(IOMapper, 0);
+OSMetaClassDefineReservedUsed(IOMapper, 0);
 OSMetaClassDefineReservedUnused(IOMapper, 1);
 OSMetaClassDefineReservedUnused(IOMapper, 2);
 OSMetaClassDefineReservedUnused(IOMapper, 3);
@@ -130,98 +136,44 @@ void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
         iovmInsert(addr, offset + i, pageList[i].phys_addr);
 }
 
-struct ARTTableData {
-    void *v;
-    upl_t u[0];
-};
-#define getARTDataP(data) ((ARTTableData *) (data)->getBytesNoCopy())
-
-OSData *
-IOMapper::NewARTTable(IOByteCount size,
-                      void ** virtAddrP, ppnum_t *physAddrP)
+OSData * IOMapper::
+NewARTTable(IOByteCount size, void ** virtAddrP, ppnum_t *physAddrP)
 {
-    OSData *ret;
+    if (!virtAddrP || !physAddrP)
+       return 0;
+
     kern_return_t kr;
-    vm_address_t startUpl;
-    ARTTableData *dataP;
-    unsigned int dataSize;
-    upl_page_info_t *pl = 0;
+    vm_address_t address;
 
-    // Each UPL can deal with about one meg at the moment
     size = round_page_32(size);
-    dataSize = sizeof(ARTTableData) + sizeof(upl_t) * size / (1024 * 1024);
-    ret = OSData::withCapacity(dataSize);
-    if (!ret)
+    kr = kmem_alloc_contig(kernel_map, &address, size, PAGE_MASK, 0);
+    if (kr)
         return 0;
 
-    // Append 0's to the buffer, in-other-words reset to nulls.
-    ret->appendBytes(NULL, sizeof(ARTTableData));
-    dataP = getARTDataP(ret);
+    ppnum_t pagenum = pmap_find_phys(kernel_pmap, (addr64_t) address);
+    if (pagenum)
+       *physAddrP = pagenum;
+    else {
+       FreeARTTable((OSData *) address, size);
+       address = 0;
+    }
 
-    kr = kmem_alloc_contig(kernel_map, &startUpl, size, PAGE_MASK, 0);
-    if (kr)
-        return 0;
+    *virtAddrP = (void *) address;
 
-    dataP->v = (void *) startUpl;
-
-    do {
-        upl_t iopl;
-        int upl_flags = UPL_SET_INTERNAL | UPL_SET_LITE
-                      | UPL_SET_IO_WIRE | UPL_COPYOUT_FROM;
-        vm_size_t iopl_size = size;
-
-        kr = vm_map_get_upl(kernel_map,
-                            (vm_map_offset_t)startUpl,
-                            &iopl_size,
-                            &iopl,
-                            0,
-                            0,
-                            &upl_flags,
-                            0);
-        if (kr) {
-            panic("IOMapper:vm_map_get_upl returned 0x%x\n");
-            goto bail;
-        }
-
-        if (!ret->appendBytes(&iopl, sizeof(upl_t)))
-            goto bail;
-            
-        startUpl += iopl_size;
-        size -= iopl_size;
-    } while(size);
-
-    // Need to re-establish the dataP as the OSData may have grown.
-    dataP = getARTDataP(ret);
-
-    // Now grab the page entry of the first page and get its phys addr
-    pl = UPL_GET_INTERNAL_PAGE_LIST(dataP->u[0]);
-    *physAddrP = pl->phys_addr;
-    *virtAddrP = dataP->v;
-
-    return ret;
-
-bail:
-    FreeARTTable(ret, size);
-    return 0;
+    return (OSData *) address;
 }
 
 void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
 {
-    assert(artHandle);
-
-    ARTTableData *dataP = getARTDataP(artHandle);
+    vm_address_t address = (vm_address_t) artHandle;
 
-    int numupls = ((artHandle->getLength() - sizeof(*dataP)) / sizeof(upl_t));
-    for (int i = 0; i < numupls; i++) {
-        upl_abort(dataP->u[i], 0);
-        upl_deallocate(dataP->u[i]);
-    }
+    size = round_page_32(size);
+    kmem_free(kernel_map, address, size);      // Just panic if address is 0
+}
 
-    if (dataP->v) {
-        size = round_page_32(size);
-        kmem_free(kernel_map, (vm_address_t) dataP->v, size);
-    }
-    artHandle->release();
+bool IOMapper::getBypassMask(addr64_t *maskP) const
+{
+    return false;
 }
 
 __BEGIN_DECLS
@@ -385,4 +337,24 @@ void IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
         ml_phys_write_double((vm_offset_t) address, value);
 }
 
+mach_vm_address_t IOMallocPhysical(mach_vm_size_t size, mach_vm_address_t mask)
+{
+    mach_vm_address_t address = 0;
+    if (gIOCopyMapper)
+    {
+       address = ptoa_64(gIOCopyMapper->iovmAlloc(atop_64(round_page(size))));
+    }
+
+    return (address);
+}
+
+void IOFreePhysical(mach_vm_address_t address, mach_vm_size_t size)
+{
+    if (gIOCopyMapper)
+    {
+       gIOCopyMapper->iovmFree(atop_64(address), atop_64(round_page(size)));
+    }
+}
+
+
 __END_DECLS