1 /* $NetBSD: pci_usrreq.c,v 1.16 2008/06/11 19:27:03 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 1.16 2008/06/11 19:27:03 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 if (cmd == PCI_IOC_BDF_CFGREAD) 88 bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag, 89 bdfr->cfgreg.reg); 90 else { 91 if ((flag & FWRITE) == 0) 92 return (EBADF); 93 pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg, 94 bdfr->cfgreg.val); 95 } 96 break; 97 98 case PCI_IOC_BUSINFO: 99 binfo->busno = sc->sc_bus; 100 binfo->maxdevs = sc->sc_maxndevs; 101 break; 102 103 default: 104 return (ENOTTY); 105 } 106 107 return (0); 108 } 109 110 static paddr_t 111 pcimmap(dev_t dev, off_t offset, int prot) 112 { 113 #if 0 114 struct pci_softc *sc = device_lookup_private(&pci_cd, minor(dev)); 115 116 /* 117 * Since we allow mapping of the entire bus, we 118 * take the offset to be the address on the bus, 119 * and pass 0 as the offset into that range. 120 * 121 * XXX Need a way to deal with linear/prefetchable/etc. 122 */ 123 return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0)); 124 #else 125 /* XXX Consider this further. */ 126 return (-1); 127 #endif 128 } 129 130 const struct cdevsw pci_cdevsw = { 131 pciopen, nullclose, noread, nowrite, pciioctl, 132 nostop, notty, nopoll, pcimmap, nokqfilter, D_OTHER, 133 }; 134 135 /* 136 * pci_devioctl: 137 * 138 * PCI ioctls that can be performed on devices directly. 139 */ 140 int 141 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, void *data, 142 int flag, struct lwp *l) 143 { 144 struct pciio_cfgreg *r = (void *) data; 145 146 switch (cmd) { 147 case PCI_IOC_CFGREAD: 148 case PCI_IOC_CFGWRITE: 149 if (cmd == PCI_IOC_CFGREAD) 150 r->val = pci_conf_read(pc, tag, r->reg); 151 else { 152 if ((flag & FWRITE) == 0) 153 return (EBADF); 154 pci_conf_write(pc, tag, r->reg, r->val); 155 } 156 break; 157 158 default: 159 return (EPASSTHROUGH); 160 } 161 162 return (0); 163 } 164