/*      $OpenBSD: pci_map.c,v 1.6 2001/06/13 08:25:25 niklas Exp $     *//*	$NetBSD: pci_map.c,v 1.7 2000/05/10 16:58:42 thorpej Exp $	*//*- * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum; by William R. Studenmund; by Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *        This product includes software developed by the NetBSD *        Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its *    contributors may be used to endorse or promote products derived *    from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. *//* * PCI device mapping. */#include <sys/param.h>#include <sys/systm.h>#include <sys/device.h>#include <dev/pci/pcireg.h>#include <dev/pci/pcivar.h>static int nbsd_pci_io_find __P((pci_chipset_tag_t, pcitag_t, int, pcireg_t,    bus_addr_t *, bus_size_t *, int *));static int nbsd_pci_mem_find __P((pci_chipset_tag_t, pcitag_t, int, pcireg_t,    bus_addr_t *, bus_size_t *, int *));static intnbsd_pci_io_find(pc, tag, reg, type, basep, sizep, flagsp)	pci_chipset_tag_t pc;	pcitag_t tag;	int reg;	pcireg_t type;	bus_addr_t *basep;	bus_size_t *sizep;	int *flagsp;{	pcireg_t address, mask;	int s;	if (reg < PCI_MAPREG_START || reg >= PCI_MAPREG_END || (reg & 3))		panic("pci_io_find: bad request");	/*	 * Section 6.2.5.1, `Address Maps', tells us that:	 *	 * 1) The builtin software should have already mapped the device in a	 * reasonable way.	 *	 * 2) A device which wants 2^n bytes of memory will hardwire the bottom	 * n bits of the address to 0.  As recommended, we write all 1s and see	 * what we get back.	 */	s = splhigh();	address = pci_conf_read(pc, tag, reg);	//printf("tag=%x,reg=%x,value=%x\n",tag,reg,address);	pci_conf_write(pc, tag, reg, 0xffffffff);	mask = pci_conf_read(pc, tag, reg);	pci_conf_write(pc, tag, reg, address);	splx(s);	if (PCI_MAPREG_TYPE(address) != PCI_MAPREG_TYPE_IO) {		printf("pci_io_find: expected type i/o, found mem\n");		return (1);	}	if (PCI_MAPREG_IO_SIZE(mask) == 0) {		printf("pci_io_find: void region\n");		return (1);	}	if (basep != 0)		*basep = PCI_MAPREG_IO_ADDR(address);	if (sizep != 0)		*sizep = PCI_MAPREG_IO_SIZE(mask);	if (flagsp != 0)		*flagsp = 0;	return (0);}static intnbsd_pci_mem_find(pc, tag, reg, type, basep, sizep, flagsp)	pci_chipset_tag_t pc;	pcitag_t tag;	int reg;	pcireg_t type;	bus_addr_t *basep;	bus_size_t *sizep;	int *flagsp;{	pcireg_t address, mask, address1 = 0, mask1 = 0xffffffff;	u_int64_t waddress, wmask;	int s, is64bit;	is64bit = (PCI_MAPREG_MEM_TYPE(type) == PCI_MAPREG_MEM_TYPE_64BIT);	if (reg < PCI_MAPREG_START || reg >= PCI_MAPREG_END || (reg & 3))		panic("pci_mem_find: bad request");	if (is64bit && (reg + 4) >= PCI_MAPREG_END)		panic("pci_mem_find: bad 64-bit request");	/*	 * Section 6.2.5.1, `Address Maps', tells us that:	 *	 * 1) The builtin software should have already mapped the device in a	 * reasonable way.	 *	 * 2) A device which wants 2^n bytes of memory will hardwire the bottom	 * n bits of the address to 0.  As recommended, we write all 1s and see	 * what we get back.	 */	s = splhigh();	address = pci_conf_read(pc, tag, reg);	pci_conf_write(pc, tag, reg, 0xffffffff);	mask = pci_conf_read(pc, tag, reg);	pci_conf_write(pc, tag, reg, address);	if (is64bit) {		address1 = pci_conf_read(pc, tag, reg + 4);		pci_conf_write(pc, tag, reg + 4, 0xffffffff);		mask1 = pci_conf_read(pc, tag, reg + 4);		pci_conf_write(pc, tag, reg + 4, address1);	}	splx(s);	if (PCI_MAPREG_TYPE(address) != PCI_MAPREG_TYPE_MEM) {		printf("pci_mem_find: expected type mem, found i/o\n");		return (1);	}	if (type != -1 && 	    PCI_MAPREG_MEM_TYPE(address) != PCI_MAPREG_MEM_TYPE(type)) {		printf("pci_mem_find: expected mem type %08x, found %08x\n",		    PCI_MAPREG_MEM_TYPE(type),		    PCI_MAPREG_MEM_TYPE(address));		return (1);	}	waddress = (u_int64_t)address1 << 32UL | address;	wmask = (u_int64_t)mask1 << 32UL | mask;	if (PCI_MAPREG_MEM64_SIZE(wmask) == 0) {		printf("pci_mem_find: void region\n");		return (1);	}	switch (PCI_MAPREG_MEM_TYPE(address)) {	case PCI_MAPREG_MEM_TYPE_32BIT:	case PCI_MAPREG_MEM_TYPE_32BIT_1M:		break;	case PCI_MAPREG_MEM_TYPE_64BIT:		/*		 * Handle the case of a 64-bit memory register on a		 * platform with 32-bit addressing.  Make sure that		 * the address assigned and the device's memory size		 * fit in 32 bits.  We implicitly assume that if		 * bus_addr_t is 64-bit, then so is bus_size_t.		 */		if (sizeof(u_int64_t) > sizeof(bus_addr_t) &&		    (address1 != 0 || mask1 != 0xffffffff)) {			printf("pci_mem_find: 64-bit memory map which is "			    "inaccessible on a 32-bit platform\n");			return (1);		}		break;	default:		printf("pci_mem_find: reserved mapping register type\n");		return (1);	}	if (sizeof(u_int64_t) > sizeof(bus_addr_t)) {		if (basep != 0)			*basep = PCI_MAPREG_MEM_ADDR(address);		if (sizep != 0)			*sizep = PCI_MAPREG_MEM_SIZE(mask);	} else {		if (basep != 0)			*basep = PCI_MAPREG_MEM64_ADDR(waddress);		if (sizep != 0)			*sizep = PCI_MAPREG_MEM64_SIZE(wmask);	}	if (flagsp != 0)		*flagsp = PCI_MAPREG_MEM_CACHEABLE(address)#ifndef __OpenBSD__		    ? BUS_SPACE_MAP_CACHEABLE : 0#endif		  ;	return (0);}intpci_io_find(pc, pcitag, reg, iobasep, iosizep)	pci_chipset_tag_t pc;	pcitag_t pcitag;	int reg;	bus_addr_t *iobasep;	bus_size_t *iosizep;{	return (nbsd_pci_io_find(pc, pcitag, reg, 0, iobasep, iosizep, 0));}intpci_mem_find(pc, pcitag, reg, membasep, memsizep, cacheablep)	pci_chipset_tag_t pc;	pcitag_t pcitag;	int reg;	bus_addr_t *membasep;	bus_size_t *memsizep;	int *cacheablep;{	return (nbsd_pci_mem_find(pc, pcitag, reg, -1, membasep, memsizep,				  cacheablep));}pcireg_tpci_mapreg_type(pc, tag, reg)	pci_chipset_tag_t pc;	pcitag_t tag;	int reg;{	pcireg_t rv;	rv = pci_conf_read(pc, tag, reg);	if (PCI_MAPREG_TYPE(rv) == PCI_MAPREG_TYPE_IO)		rv &= PCI_MAPREG_TYPE_MASK;	else		rv &= PCI_MAPREG_TYPE_MASK|PCI_MAPREG_MEM_TYPE_MASK;	return (rv);}intpci_mapreg_info(pc, tag, reg, type, basep, sizep, flagsp)	pci_chipset_tag_t pc;	pcitag_t tag;	int reg;	pcireg_t type;	bus_addr_t *basep;	bus_size_t *sizep;	int *flagsp;{	if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_IO)		return (nbsd_pci_io_find(pc, tag, reg, type, basep, sizep,		    flagsp));	else		return (nbsd_pci_mem_find(pc, tag, reg, type, basep, sizep,		    flagsp));}intpci_mapreg_map(pa, reg, type, busflags, tagp, handlep, basep, sizep, maxsize)	struct pci_attach_args *pa;	int reg, busflags;	pcireg_t type;	bus_space_tag_t *tagp;	bus_space_handle_t *handlep;	bus_addr_t *basep;	bus_size_t *sizep;	bus_size_t maxsize;{	bus_space_tag_t tag;	bus_space_handle_t handle;	bus_addr_t base;	bus_size_t size;	int flags;	if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_IO) {		if ((pa->pa_flags & PCI_FLAGS_IO_ENABLED) == 0)			return (1);		if (nbsd_pci_io_find(pa->pa_pc, pa->pa_tag, reg, type, &base,				     &size, &flags))			return (1);		tag = pa->pa_iot;	} else {		if ((pa->pa_flags & PCI_FLAGS_MEM_ENABLED) == 0)			return (1);		if (nbsd_pci_mem_find(pa->pa_pc, pa->pa_tag, reg, type, &base,				      &size, &flags))			return (1);		tag = pa->pa_memt;	}	/* The caller can request limitation of the mapping's size. */	if (maxsize != 0 && size > maxsize) {#ifdef DEBUG		printf("pci_mapreg_map: limited PCI mapping from %lx to %lx\n",		    (u_long)size, (u_long)maxsize);#endif		size = maxsize;	}	if (bus_space_map(tag, base, size, busflags | flags, &handle))		return (1);	if (tagp != NULL)		*tagp = tag;	if (handlep != NULL)		*handlep = handle;	if (basep != NULL)		*basep = base;	if (sizep != NULL)		*sizep = size;	return (0);}