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pci_usrreq.c revision 1.1 
      1 /*	$NetBSD: pci_usrreq.c,v 1.1 2001/09/13 21:49:40 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/param.h>
     43 #include <sys/conf.h>
     44 #include <sys/device.h>
     45 #include <sys/ioctl.h>
     46 #include <sys/proc.h>
     47 #include <sys/systm.h>
     48 #include <sys/errno.h>
     49 #include <sys/fcntl.h>
     50 
     51 #include <dev/pci/pcireg.h>
     52 #include <dev/pci/pcivar.h>
     53 #include <dev/pci/pciio.h>
     54 
     55 cdev_decl(pci);
     56 
     57 int
     58 pciopen(dev_t dev, int flags, int mode, struct proc *p)
     59 {
     60 	struct pci_softc *sc;
     61 	int unit;
     62 
     63 	unit = minor(dev);
     64 	sc = device_lookup(&pci_cd, unit);
     65 	if (sc == NULL)
     66 		return (ENXIO);
     67 
     68 	return (0);
     69 }
     70 
     71 int
     72 pciclose(dev_t dev, int flags, int mode, struct proc *p)
     73 {
     74 
     75 	return (0);
     76 }
     77 
     78 int
     79 pciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
     80 {
     81 	struct pci_softc *sc = device_lookup(&pci_cd, minor(dev));
     82 	struct pciio_bdf_cfgreg *bdfr = (void *) data;
     83 	struct pciio_businfo *binfo = (void *) data;
     84 	pcitag_t tag;
     85 
     86 	switch (cmd) {
     87 	case PCI_IOC_BDF_CFGREAD:
     88 	case PCI_IOC_BDF_CFGWRITE:
     89 		if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs ||
     90 		    bdfr->function > 7)
     91 			return (EINVAL);
     92 		tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device,
     93 		    bdfr->function);
     94 		if (cmd == PCI_IOC_BDF_CFGREAD)
     95 			bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag,
     96 			    bdfr->cfgreg.reg);
     97 		else {
     98 			if ((flag & FWRITE) == 0)
     99 				return (EBADF);
    100 			pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg,
    101 			    bdfr->cfgreg.val);
    102 		}
    103 		break;
    104 
    105 	case PCI_IOC_BUSINFO:
    106 		binfo->busno = sc->sc_bus;
    107 		binfo->maxdevs = sc->sc_maxndevs;
    108 		break;
    109 
    110 	default:
    111 		return (ENOTTY);
    112 	}
    113 
    114 	return (0);
    115 }
    116 
    117 paddr_t
    118 pcimmap(dev_t dev, off_t offset, int prot)
    119 {
    120 	struct pci_softc *sc = device_lookup(&pci_cd, minor(dev));
    121 
    122 	/*
    123 	 * Since we allow mapping of the entire bus, we
    124 	 * take the offset to be the address on the bus,
    125 	 * and pass 0 as the offset into that range.
    126 	 *
    127 	 * XXX Need a way to deal with linear/prefetchable/etc.
    128 	 */
    129 	return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0));
    130 }
    131 
    132 /*
    133  * pci_devioctl:
    134  *
    135  *	PCI ioctls that can be performed on devices directly.
    136  */
    137 int
    138 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, caddr_t data,
    139     int flag, struct proc *p)
    140 {
    141 	struct pciio_cfgreg *r = (void *) data;
    142 
    143 	switch (cmd) {
    144 	case PCI_IOC_CFGREAD:
    145 	case PCI_IOC_CFGWRITE:
    146 		if (cmd == PCI_IOC_CFGREAD)
    147 			r->val = pci_conf_read(pc, tag, r->reg);
    148 		else {
    149 			if ((flag & FWRITE) == 0)
    150 				return (EBADF);
    151 			pci_conf_write(pc, tag, r->reg, r->val);
    152 		}
    153 		break;
    154 
    155 	default:
    156 		return (ENOTTY);
    157 	}
    158 
    159 	return (0);
    160 }
    161