+#define MFI_STAT_OK 0x00
+#define MFI_DCMD_PD_GET_LIST 0x02010000
+/*
+* Number of mailbox bytes in DCMD message frame
+*/
+#define MFI_MBOX_SIZE 12
+#define MAX_IOCTL_SGE 16
+#define MFI_FRAME_DIR_NONE 0x0000
+#define MFI_FRAME_DIR_WRITE 0x0008
+#define MFI_FRAME_DIR_READ 0x0010
+#define MFI_FRAME_DIR_BOTH 0x0018
+
+#define MAX_SYS_PDS 240