Add API entrypoints for IPC functionality

Implement three new APIs for IPC buffer sharing:
	-hsaKmtShareMemory()
	-hsaKmtRegisterSharedHandle()
	-hsaKmtRegisterSharedHandleToNodes()

Add new ioclts necessary for the above APIs.

Change-Id: Ia2b4d0dc91ec64bff959395d11c0536467404792
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>

include/hsakmt.h

@@ -406,6 +406,43 @@ hsaKmtRegisterGraphicsHandleToNodes(
     HSAuint32*      NodeArray                      //IN
     );
 
+/**
+ Export a memory buffer for sharing with other processes
+
+ NOTE: for the current revision of the thunk spec, SizeInBytes
+ must match whole allocation.
+*/
+HSAKMT_STATUS
+HSAKMTAPI
+hsaKmtShareMemory(
+	void                  *MemoryAddress,     // IN
+	HSAuint64             SizeInBytes,        // IN
+	HsaSharedMemoryHandle *SharedMemoryHandle // OUT
+);
+
+/**
+ Register shared memory handle
+*/
+HSAKMT_STATUS
+HSAKMTAPI
+hsaKmtRegisterSharedHandle(
+	const HsaSharedMemoryHandle *SharedMemoryHandle, // IN
+	void                        **MemoryAddress,     // OUT
+	HSAuint64                   *SizeInBytes         // OUT
+);
+
+/**
+ Register shared memory handle to specific nodes only
+*/
+HSAKMT_STATUS
+HSAKMTAPI
+hsaKmtRegisterSharedHandleToNodes(
+	const HsaSharedMemoryHandle *SharedMemoryHandle, // IN
+	void                        **MemoryAddress,     // OUT
+	HSAuint64                   *SizeInBytes,        // OUT
+	HSAuint64                   NumberOfNodes,       // OUT
+	HSAuint32*                  NodeArray            // OUT
+);
 
 /**
   Unregisters with KFD a memory buffer

include/hsakmttypes.h

@@ -1004,6 +1004,8 @@ typedef struct _HsaPointerInfo {
     void               *UserData;        // User data associated with the memory
 } HsaPointerInfo;
 
+typedef HSAuint32 HsaSharedMemoryHandle[8];
+
 #pragma pack(pop, hsakmttypes_h)
 
 

include/linux/kfd_ioctl.h

@@ -356,6 +356,22 @@ struct kfd_ioctl_import_dmabuf_args {
 	uint32_t dmabuf_fd;	/* to KFD */
 };
 
+struct kfd_ioctl_ipc_export_handle_args {
+	uint64_t handle;		/* to KFD */
+	uint32_t share_handle[4];	/* from KFD */
+	uint32_t gpu_id;		/* to KFD */
+	uint32_t pad;
+};
+
+struct kfd_ioctl_ipc_import_handle_args {
+	uint64_t handle;		/* from KFD */
+	uint64_t va_addr;		/* to KFD */
+	uint64_t mmap_offset;		/* from KFD */
+	uint32_t share_handle[4];	/* to KFD */
+	uint32_t gpu_id;		/* to KFD */
+	uint32_t pad;
+};
+
 struct kfd_ioctl_get_tile_config_args {
 	/* to KFD: pointer to tile array */
 	uint64_t tile_config_ptr;
@@ -482,7 +498,13 @@ struct kfd_ioctl_get_tile_config_args {
 #define AMDKFD_IOC_GET_TILE_CONFIG		\
 	AMDKFD_IOWR(0x21, struct kfd_ioctl_get_tile_config_args)
 
+#define AMDKFD_IOC_IPC_IMPORT_HANDLE		\
+	AMDKFD_IOWR(0x22, struct kfd_ioctl_ipc_import_handle_args)
+
+#define AMDKFD_IOC_IPC_EXPORT_HANDLE		\
+	AMDKFD_IOWR(0x23, struct kfd_ioctl_ipc_export_handle_args)
+
 #define AMDKFD_COMMAND_START		0x01
-#define AMDKFD_COMMAND_END		0x22
+#define AMDKFD_COMMAND_END		0x24
 
 #endif