1 /* $NetBSD: pci_usrreq.c,v 1.9 2005/06/28 00:28:42 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/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: pci_usrreq.c,v 1.9 2005/06/28 00:28:42 thorpej 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 proc *p) 60 { 61 struct pci_softc *sc; 62 int unit; 63 64 unit = minor(dev); 65 sc = device_lookup(&pci_cd, unit); 66 if (sc == NULL) 67 return (ENXIO); 68 69 return (0); 70 } 71 72 static int 73 pciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 74 { 75 struct pci_softc *sc = device_lookup(&pci_cd, minor(dev)); 76 struct pciio_bdf_cfgreg *bdfr = (void *) data; 77 struct pciio_businfo *binfo = (void *) data; 78 pcitag_t tag; 79 80 switch (cmd) { 81 case PCI_IOC_BDF_CFGREAD: 82 case PCI_IOC_BDF_CFGWRITE: 83 if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs || 84 bdfr->function > 7) 85 return (EINVAL); 86 tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device, 87 bdfr->function); 88 if (cmd == PCI_IOC_BDF_CFGREAD) 89 bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag, 90 bdfr->cfgreg.reg); 91 else { 92 if ((flag & FWRITE) == 0) 93 return (EBADF); 94 pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg, 95 bdfr->cfgreg.val); 96 } 97 break; 98 99 case PCI_IOC_BUSINFO: 100 binfo->busno = sc->sc_bus; 101 binfo->maxdevs = sc->sc_maxndevs; 102 break; 103 104 default: 105 return (ENOTTY); 106 } 107 108 return (0); 109 } 110 111 static paddr_t 112 pcimmap(dev_t dev, off_t offset, int prot) 113 { 114 #if 0 115 struct pci_softc *sc = device_lookup(&pci_cd, minor(dev)); 116 117 /* 118 * Since we allow mapping of the entire bus, we 119 * take the offset to be the address on the bus, 120 * and pass 0 as the offset into that range. 121 * 122 * XXX Need a way to deal with linear/prefetchable/etc. 123 */ 124 return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0)); 125 #else 126 /* XXX Consider this further. */ 127 return (-1); 128 #endif 129 } 130 131 const struct cdevsw pci_cdevsw = { 132 pciopen, nullclose, noread, nowrite, pciioctl, 133 nostop, notty, nopoll, pcimmap, nokqfilter, 134 }; 135 136 /* 137 * pci_devioctl: 138 * 139 * PCI ioctls that can be performed on devices directly. 140 */ 141 int 142 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, caddr_t data, 143 int flag, struct proc *p) 144 { 145 struct pciio_cfgreg *r = (void *) data; 146 147 switch (cmd) { 148 case PCI_IOC_CFGREAD: 149 case PCI_IOC_CFGWRITE: 150 if (cmd == PCI_IOC_CFGREAD) 151 r->val = pci_conf_read(pc, tag, r->reg); 152 else { 153 if ((flag & FWRITE) == 0) 154 return (EBADF); 155 pci_conf_write(pc, tag, r->reg, r->val); 156 } 157 break; 158 159 default: 160 return (EPASSTHROUGH); 161 } 162 163 return (0); 164 } 165