Home | History | Annotate | Line # | Download | only in pci
pci_usrreq.c revision 1.18 
      1 /*	$NetBSD: pci_usrreq.c,v 1.18 2009/07/04 21:20:56 cegger 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 1.18 2009/07/04 21:20:56 cegger 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 static int
     59 pciopen(dev_t dev, int flags, int mode, struct lwp *l)
     60 {
     61 	device_t dv;
     62 
     63 	dv = device_lookup(&pci_cd, minor(dev));
     64 	if (dv == NULL)
     65 		return ENXIO;
     66 
     67 	return 0;
     68 }
     69 
     70 static int
     71 pciioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
     72 {
     73 	struct pci_softc *sc =
     74 	    device_lookup_private(&pci_cd, minor(dev));
     75 	struct pciio_bdf_cfgreg *bdfr = (void *) data;
     76 	struct pciio_businfo *binfo = (void *) data;
     77 	pcitag_t tag;
     78 
     79 	switch (cmd) {
     80 	case PCI_IOC_BDF_CFGREAD:
     81 	case PCI_IOC_BDF_CFGWRITE:
     82 		if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs ||
     83 		    bdfr->function > 7)
     84 			return EINVAL;
     85 		tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device,
     86 		    bdfr->function);
     87 		break;
     88 
     89 	default:
     90 		break;
     91 	}
     92 
     93 	switch (cmd) {
     94 	case PCI_IOC_BDF_CFGREAD:
     95 		bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag,
     96 		    bdfr->cfgreg.reg);
     97 		break;
     98 
     99 	case PCI_IOC_BDF_CFGWRITE:
    100 		if ((flag & FWRITE) == 0)
    101 			return EBADF;
    102 		pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg,
    103 		    bdfr->cfgreg.val);
    104 		break;
    105 
    106 	case PCI_IOC_BUSINFO:
    107 		binfo->busno = sc->sc_bus;
    108 		binfo->maxdevs = sc->sc_maxndevs;
    109 		break;
    110 
    111 	default:
    112 		return ENOTTY;
    113 	}
    114 
    115 	return 0;
    116 }
    117 
    118 static paddr_t
    119 pcimmap(dev_t dev, off_t offset, int prot)
    120 {
    121 #if 0
    122 	struct pci_softc *sc = device_lookup_private(&pci_cd, minor(dev));
    123 
    124 	/*
    125 	 * Since we allow mapping of the entire bus, we
    126 	 * take the offset to be the address on the bus,
    127 	 * and pass 0 as the offset into that range.
    128 	 *
    129 	 * XXX Need a way to deal with linear/prefetchable/etc.
    130 	 */
    131 	return bus_space_mmap(sc->sc_memt, offset, 0, prot, 0);
    132 #else
    133 	/* XXX Consider this further. */
    134 	return -1;
    135 #endif
    136 }
    137 
    138 const struct cdevsw pci_cdevsw = {
    139 	pciopen, nullclose, noread, nowrite, pciioctl,
    140 	nostop, notty, nopoll, pcimmap, nokqfilter, D_OTHER,
    141 };
    142 
    143 /*
    144  * pci_devioctl:
    145  *
    146  *	PCI ioctls that can be performed on devices directly.
    147  */
    148 int
    149 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, void *data,
    150     int flag, struct lwp *l)
    151 {
    152 	struct pciio_cfgreg *r = (void *) data;
    153 
    154 	switch (cmd) {
    155 	case PCI_IOC_CFGREAD:
    156 		r->val = pci_conf_read(pc, tag, r->reg);
    157 		break;
    158 
    159 	case PCI_IOC_CFGWRITE:
    160 		if ((flag & FWRITE) == 0)
    161 			return EBADF;
    162 		pci_conf_write(pc, tag, r->reg, r->val);
    163 		break;
    164 
    165 	default:
    166 		return EPASSTHROUGH;
    167 	}
    168 
    169 	return 0;
    170 }
    171