/* Unit definitions */
#define FSR_CTLUNIT (-1)
#define FSR_UNITNONE (-1)
#define MAXRESERVEDUNIT 15 /*200*/

/* Generally, if you want to request ownership of a specific arbitrary unit, 
   pick a number under MAXRESERVEDUNIT. The device will randomly hand out
	 unused unit positions over MAXRESERVEDUNIT */

struct FSRUnit {
	struct Node fsru_Node; /* fakesr private */
	ULONG fsru_Num;
	ULONG (*fsru_BeginIO)(void *IORequest);
	ULONG (*fsru_AbortIO)(void *IORequest);
	ULONG (*fsru_Open)(void *IORequest); /* called on unit OpenDevice */
	ULONG (*fsru_Close)(void *IORequest); /* called on unit CloseDevice */
	void *fsru_UserData[5];
};

/* for FSR_CTLUNIT access, you MUST use a struct IOStdReq */
/* by convention you should use a struct IOExtSer for all
other unit accesses, although it is not required, if the 
unit's owner supports other structures */

/* extended commands for FSR_CTLUNIT */
#define FSRCMD_ADDUNIT (CMD_NONSTD+1)
/* for FSRCMD_ADDUNIT set Unit->fsru_Num equal to the desired unit number,
or FSR_UNITNONE if you don't care. set io_Data to a pointer to your
struct FSRUnit. */


#define FSRCMD_REMUNIT (CMD_NONSTD+2) 
/* set io_Data to a pointer to the FSRUnit you want to remove */

/* fakesr FSR_CTLUNIT DOES NOT support control commands sent 
   from interrupt code. Don't try it.
	 HOWEVER: Individual units may support such accesses */
 
/* Errors */
#define FSRCTLERR_NONUNIQUE 1 /* possible error return from FSR_CTLUNIT */