FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/pci_usrreq.c

     /*      $NetBSD: pci_usrreq.c,v 1.8 2003/06/29 22:30:27 fvdl Exp $      */
     
     /*
      * Copyright 2001 Wasabi Systems, Inc.
      * All rights reserved.
      *
      * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      *
      * 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 for the NetBSD Project by
     *      Wasabi Systems, Inc.
     * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     *    or promote products derived from this software without specific prior
     *    written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
     * 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.
     */
    
    /*
     * User -> kernel interface for PCI bus access.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: pci_usrreq.c,v 1.8 2003/06/29 22:30:27 fvdl Exp $");
    
    #include <sys/param.h>
    #include <sys/conf.h>
    #include <sys/device.h>
    #include <sys/ioctl.h>
    #include <sys/proc.h>
    #include <sys/systm.h>
    #include <sys/errno.h>
    #include <sys/fcntl.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pciio.h>
    
    dev_type_open(pciopen);
    dev_type_ioctl(pciioctl);
    dev_type_mmap(pcimmap);
    
    const struct cdevsw pci_cdevsw = {
            pciopen, nullclose, noread, nowrite, pciioctl,
            nostop, notty, nopoll, pcimmap, nokqfilter,
    };
    
    int
    pciopen(dev_t dev, int flags, int mode, struct proc *p)
    {
            struct pci_softc *sc;
            int unit;
    
            unit = minor(dev);
            sc = device_lookup(&pci_cd, unit);
            if (sc == NULL)
                    return (ENXIO);
    
            return (0);
    }
    
    int
    pciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
    {
            struct pci_softc *sc = device_lookup(&pci_cd, minor(dev));
            struct pciio_bdf_cfgreg *bdfr = (void *) data;
            struct pciio_businfo *binfo = (void *) data;
            pcitag_t tag;
    
            switch (cmd) {
            case PCI_IOC_BDF_CFGREAD:
            case PCI_IOC_BDF_CFGWRITE:
                    if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs ||
                        bdfr->function > 7)
                            return (EINVAL);
                    tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device,
                        bdfr->function);
                    if (cmd == PCI_IOC_BDF_CFGREAD)
                            bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag,
                                bdfr->cfgreg.reg);
                   else {
                           if ((flag & FWRITE) == 0)
                                   return (EBADF);
                           pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg,
                               bdfr->cfgreg.val);
                   }
                   break;
   
           case PCI_IOC_BUSINFO:
                   binfo->busno = sc->sc_bus;
                   binfo->maxdevs = sc->sc_maxndevs;
                   break;
   
           default:
                   return (ENOTTY);
           }
   
           return (0);
   }
   
   paddr_t
   pcimmap(dev_t dev, off_t offset, int prot)
   {
   #if 0
           struct pci_softc *sc = device_lookup(&pci_cd, minor(dev));
   
           /*
            * Since we allow mapping of the entire bus, we
            * take the offset to be the address on the bus,
            * and pass 0 as the offset into that range.
            *
            * XXX Need a way to deal with linear/prefetchable/etc.
            */
           return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0));
   #else
           /* XXX Consider this further. */
           return (-1);
   #endif
   }
   
   /*
    * pci_devioctl:
    *
    *      PCI ioctls that can be performed on devices directly.
    */
   int
   pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, caddr_t data,
       int flag, struct proc *p)
   {
           struct pciio_cfgreg *r = (void *) data;
   
           switch (cmd) {
           case PCI_IOC_CFGREAD:
           case PCI_IOC_CFGWRITE:
                   if (cmd == PCI_IOC_CFGREAD)
                           r->val = pci_conf_read(pc, tag, r->reg);
                   else {
                           if ((flag & FWRITE) == 0)
                                   return (EBADF);
                           pci_conf_write(pc, tag, r->reg, r->val);
                   }
                   break;
   
           default:
                   return (EPASSTHROUGH);
           }
   
           return (0);
   }

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