/* 
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file "COPYING" in the main directory of
 * this archive for more details.
 *
 * Copyright (C) 1997, 2001 Silicon Graphics, Inc. All rights reserved.
 *
 */

#ifndef _ASM_SN_PCI_PCIBA_H
#define _ASM_SN_PCI_PCIBA_H

#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/pci.h>

/* for application compatibility with IRIX (why do I bother?) */

#ifndef __KERNEL__
typedef u_int8_t uint8_t;
typedef u_int16_t uint16_t;
typedef u_int32_t uint32_t;
#endif

#define PCI_CFG_VENDOR_ID	PCI_VENDOR_ID
#define PCI_CFG_COMMAND		PCI_COMMAND
#define PCI_CFG_REV_ID		PCI_REVISION_ID
#define PCI_CFG_HEADER_TYPE	PCI_HEADER_TYPE
#define PCI_CFG_BASE_ADDR(n)	PCI_BASE_ADDRESS_##n


/* /hw/.../pci/[slot]/config accepts ioctls to read
 * and write specific registers as follows:
 *
 * "t" is the native type (char, short, uint32, uint64)
 * to read from CFG space; results will be arranged in
 * byte significance (ie. first byte from PCI is lowest
 * or last byte in result).
 *
 * "r" is the byte offset in PCI CFG space of the first
 * byte of the register (it's least significant byte,
 * in the little-endian PCI numbering). This can actually
 * be as much as 16 bits wide, and is intended to match
 * the layout of a "Type 1 Configuration Space" address:
 * the register number in the low eight bits, then three
 * bits for the function number and five bits for the
 * slot number.
 */
#define	PCIIOCCFGRD(t,r)	_IOR(0,(r),t)
#define	PCIIOCCFGWR(t,r)	_IOW(0,(r),t)

/* Some common config register access commands.
 * Use these as examples of how to construct
 * values for other registers you want to access.
 */

/* PCIIOCGETID: arg is ptr to 32-bit int,
 * returns the 32-bit ID value with VENDOR
 * in the bottom 16 bits and DEVICE in the top.
 */
#define	PCIIOCGETID		PCIIOCCFGRD(uint32_t,PCI_CFG_VENDOR_ID)

/* PCIIOCSETCMD: arg is ptr to a 16-bit short,
 * which will be written to the CMD register.
 */
#define	PCIIOCSETCMD		PCIIOCCFGWR(uint16_t,PCI_CFG_COMMAND)

/* PCIIOCGETREV: arg is ptr to an 8-bit char,
 * which will get the 8-bit revision number.
 */
#define	PCIIOCGETREV		PCIIOCCFGRD(uint8_t,PCI_CFG_REV_ID)

/* PCIIOCGETHTYPE: arg is ptr to an 8-bit char,
 * which will get the 8-bit header type.
 */
#define	PCIIOCGETHTYPE		PCIIOCCFGRD(uint8_t,PCI_CFG_HEADER_TYPE)

/* PCIIOCGETBASE(n): arg is ptr to a 32-bit int,
 * which will get the value of the BASE<n> register.
 */

/* FIXME chadt: this doesn't tell me whether or not this will work
   with non-constant 'n.'  */
#define	PCIIOCGETBASE(n)	PCIIOCCFGRD(uint32_t,PCI_CFG_BASE_ADDR(n))


/* /hw/.../pci/[slot]/dma accepts ioctls to allocate
 * and free physical memory for use in user-triggered
 * DMA operations.
 */
#define	PCIIOCDMAALLOC		_IOWR(0,1,uint64_t)
#define	PCIIOCDMAFREE		_IOW(0,1,uint64_t)

/* The parameter for PCIIOCDMAALLOC needs to contain
 * both the size of the request and the flag values
 * to be used in setting up the DMA.
 *

FIXME chadt: gonna have to revisit this: what flags would an IRIXer like to
 have available?

 * Any flags normally useful in pciio_dmamap
 * or pciio_dmatrans function calls can6 be used here.  */
#define	PCIIOCDMAALLOC_REQUEST_PACK(flags,size)		\
	((((uint64_t)(flags))<<32)|			\
	 (((uint64_t)(size))&0xFFFFFFFF))


#ifdef __KERNEL__
extern int pciba_init(void);
#endif


#endif	/* _ASM_SN_PCI_PCIBA_H */