StorPortFreeDmaMemory function (storport.h)
This function is the extended version of the StorPortFreeContiguousMemorySpecifyCache function. It deallocates a range of noncached memory in the nonpaged portion of the system address space.
Syntax
ULONG StorPortFreeDmaMemory(
[in] PVOID HwDeviceExtension,
[in] PVOID BaseAddress,
[in] SIZE_T NumberOfBytes,
[in] MEMORY_CACHING_TYPE CacheType,
[in_opt] PHYSICAL_ADDRESS PhysicalAddress
);
Parameters
[in] HwDeviceExtension
A pointer to the hardware device extension for the host bus adapter (HBA).
[in] BaseAddress
The base virtual address to free.
[in] NumberOfBytes
The number of bytes that are allocated to the request. This must be the same number that was supplied as a parameter when the StorPortAllocateContiguousMemorySpecifyCacheNode routine was previously called.
[in] CacheType
The cache type that is used in the call to the StorPortAllocateContiguousMemorySpecifyCacheNode routine.
[in_opt] PhysicalAddress
The physical address of the starting address of the memory block to be deallocated.
Return value
This function returns a STOR_STATUS code such as one of the following.
| Return code | Description |
|---|---|
| STOR_STATUS_NOT_IMPLEMENTED | This function is not implemented on the active operating system. |
| STOR_STATUS_SUCCESS | The operation was successful. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 10 (Version 1803) |
| Target Platform | Universal |
| Header | storport.h |