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pci_usrreq.c revision 1.3.2.2 
      1 /*	$NetBSD: pci_usrreq.c,v 1.3.2.2 2002/01/10 19:56:55 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * User -> kernel interface for PCI bus access.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: pci_usrreq.c,v 1.3.2.2 2002/01/10 19:56:55 thorpej Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/conf.h>
     47 #include <sys/device.h>
     48 #include <sys/ioctl.h>
     49 #include <sys/proc.h>
     50 #include <sys/systm.h>
     51 #include <sys/errno.h>
     52 #include <sys/fcntl.h>
     53 
     54 #include <dev/pci/pcireg.h>
     55 #include <dev/pci/pcivar.h>
     56 #include <dev/pci/pciio.h>
     57 
     58 cdev_decl(pci);
     59 
     60 int
     61 pciopen(dev_t dev, int flags, int mode, struct proc *p)
     62 {
     63 	struct pci_softc *sc;
     64 	int unit;
     65 
     66 	unit = minor(dev);
     67 	sc = device_lookup(&pci_cd, unit);
     68 	if (sc == NULL)
     69 		return (ENXIO);
     70 
     71 	return (0);
     72 }
     73 
     74 int
     75 pciclose(dev_t dev, int flags, int mode, struct proc *p)
     76 {
     77 
     78 	return (0);
     79 }
     80 
     81 int
     82 pciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
     83 {
     84 	struct pci_softc *sc = device_lookup(&pci_cd, minor(dev));
     85 	struct pciio_bdf_cfgreg *bdfr = (void *) data;
     86 	struct pciio_businfo *binfo = (void *) data;
     87 	pcitag_t tag;
     88 
     89 	switch (cmd) {
     90 	case PCI_IOC_BDF_CFGREAD:
     91 	case PCI_IOC_BDF_CFGWRITE:
     92 		if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs ||
     93 		    bdfr->function > 7)
     94 			return (EINVAL);
     95 		tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device,
     96 		    bdfr->function);
     97 		if (cmd == PCI_IOC_BDF_CFGREAD)
     98 			bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag,
     99 			    bdfr->cfgreg.reg);
    100 		else {
    101 			if ((flag & FWRITE) == 0)
    102 				return (EBADF);
    103 			pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg,
    104 			    bdfr->cfgreg.val);
    105 		}
    106 		break;
    107 
    108 	case PCI_IOC_BUSINFO:
    109 		binfo->busno = sc->sc_bus;
    110 		binfo->maxdevs = sc->sc_maxndevs;
    111 		break;
    112 
    113 	default:
    114 		return (ENOTTY);
    115 	}
    116 
    117 	return (0);
    118 }
    119 
    120 paddr_t
    121 pcimmap(dev_t dev, off_t offset, int prot)
    122 {
    123 #if 0
    124 	struct pci_softc *sc = device_lookup(&pci_cd, minor(dev));
    125 
    126 	/*
    127 	 * Since we allow mapping of the entire bus, we
    128 	 * take the offset to be the address on the bus,
    129 	 * and pass 0 as the offset into that range.
    130 	 *
    131 	 * XXX Need a way to deal with linear/prefetchable/etc.
    132 	 */
    133 	return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0));
    134 #else
    135 	/* XXX Consider this further. */
    136 	return (-1);
    137 #endif
    138 }
    139 
    140 /*
    141  * pci_devioctl:
    142  *
    143  *	PCI ioctls that can be performed on devices directly.
    144  */
    145 int
    146 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, caddr_t data,
    147     int flag, struct proc *p)
    148 {
    149 	struct pciio_cfgreg *r = (void *) data;
    150 
    151 	switch (cmd) {
    152 	case PCI_IOC_CFGREAD:
    153 	case PCI_IOC_CFGWRITE:
    154 		if (cmd == PCI_IOC_CFGREAD)
    155 			r->val = pci_conf_read(pc, tag, r->reg);
    156 		else {
    157 			if ((flag & FWRITE) == 0)
    158 				return (EBADF);
    159 			pci_conf_write(pc, tag, r->reg, r->val);
    160 		}
    161 		break;
    162 
    163 	default:
    164 		return (ENOTTY);
    165 	}
    166 
    167 	return (0);
    168 }
    169