1 /* $NetBSD: pci_usrreq.c,v 1.15 2008/03/23 16:40:12 cube 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 1.15 2008/03/23 16:40:12 cube 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 int unit; 63 64 unit = minor(dev); 65 dv = device_lookup(&pci_cd, unit); 66 if (dv == NULL) 67 return (ENXIO); 68 69 return (0); 70 } 71 72 static int 73 pciioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 74 { 75 struct pci_softc *sc = 76 device_lookup_private(&pci_cd, minor(dev)); 77 struct pciio_bdf_cfgreg *bdfr = (void *) data; 78 struct pciio_businfo *binfo = (void *) data; 79 pcitag_t tag; 80 81 switch (cmd) { 82 case PCI_IOC_BDF_CFGREAD: 83 case PCI_IOC_BDF_CFGWRITE: 84 if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs || 85 bdfr->function > 7) 86 return (EINVAL); 87 tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device, 88 bdfr->function); 89 if (cmd == PCI_IOC_BDF_CFGREAD) 90 bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag, 91 bdfr->cfgreg.reg); 92 else { 93 if ((flag & FWRITE) == 0) 94 return (EBADF); 95 pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg, 96 bdfr->cfgreg.val); 97 } 98 break; 99 100 case PCI_IOC_BUSINFO: 101 binfo->busno = sc->sc_bus; 102 binfo->maxdevs = sc->sc_maxndevs; 103 break; 104 105 default: 106 return (ENOTTY); 107 } 108 109 return (0); 110 } 111 112 static paddr_t 113 pcimmap(dev_t dev, off_t offset, int prot) 114 { 115 #if 0 116 struct pci_softc *sc = device_lookup_private(&pci_cd, minor(dev)); 117 118 /* 119 * Since we allow mapping of the entire bus, we 120 * take the offset to be the address on the bus, 121 * and pass 0 as the offset into that range. 122 * 123 * XXX Need a way to deal with linear/prefetchable/etc. 124 */ 125 return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0)); 126 #else 127 /* XXX Consider this further. */ 128 return (-1); 129 #endif 130 } 131 132 const struct cdevsw pci_cdevsw = { 133 pciopen, nullclose, noread, nowrite, pciioctl, 134 nostop, notty, nopoll, pcimmap, nokqfilter, D_OTHER, 135 }; 136 137 /* 138 * pci_devioctl: 139 * 140 * PCI ioctls that can be performed on devices directly. 141 */ 142 int 143 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, void *data, 144 int flag, struct lwp *l) 145 { 146 struct pciio_cfgreg *r = (void *) data; 147 148 switch (cmd) { 149 case PCI_IOC_CFGREAD: 150 case PCI_IOC_CFGWRITE: 151 if (cmd == PCI_IOC_CFGREAD) 152 r->val = pci_conf_read(pc, tag, r->reg); 153 else { 154 if ((flag & FWRITE) == 0) 155 return (EBADF); 156 pci_conf_write(pc, tag, r->reg, r->val); 157 } 158 break; 159 160 default: 161 return (EPASSTHROUGH); 162 } 163 164 return (0); 165 } 166