1 /* $NetBSD: pci_usrreq.c,v 1.6 2002/10/23 09:13:33 jdolecek 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 1.6 2002/10/23 09:13:33 jdolecek 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 dev_type_open(pciopen); 59 dev_type_ioctl(pciioctl); 60 dev_type_mmap(pcimmap); 61 62 const struct cdevsw pci_cdevsw = { 63 pciopen, nullclose, noread, nowrite, pciioctl, 64 nostop, notty, nopoll, pcimmap, nokqfilter, 65 }; 66 67 int 68 pciopen(dev_t dev, int flags, int mode, struct proc *p) 69 { 70 struct pci_softc *sc; 71 int unit; 72 73 unit = minor(dev); 74 sc = device_lookup(&pci_cd, unit); 75 if (sc == NULL) 76 return (ENXIO); 77 78 return (0); 79 } 80 81 int 82 pciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 83 { 84 struct pci_softc *sc = device_lookup(&pci_cd, minor(dev)); 85 struct pciio_bdf_cfgreg *bdfr = (void *) data; 86 struct pciio_businfo *binfo = (void *) data; 87 pcitag_t tag; 88 89 switch (cmd) { 90 case PCI_IOC_BDF_CFGREAD: 91 case PCI_IOC_BDF_CFGWRITE: 92 if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs || 93 bdfr->function > 7) 94 return (EINVAL); 95 tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device, 96 bdfr->function); 97 if (cmd == PCI_IOC_BDF_CFGREAD) 98 bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag, 99 bdfr->cfgreg.reg); 100 else { 101 if ((flag & FWRITE) == 0) 102 return (EBADF); 103 pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg, 104 bdfr->cfgreg.val); 105 } 106 break; 107 108 case PCI_IOC_BUSINFO: 109 binfo->busno = sc->sc_bus; 110 binfo->maxdevs = sc->sc_maxndevs; 111 break; 112 113 default: 114 return (ENOTTY); 115 } 116 117 return (0); 118 } 119 120 paddr_t 121 pcimmap(dev_t dev, off_t offset, int prot) 122 { 123 #if 0 124 struct pci_softc *sc = device_lookup(&pci_cd, minor(dev)); 125 126 /* 127 * Since we allow mapping of the entire bus, we 128 * take the offset to be the address on the bus, 129 * and pass 0 as the offset into that range. 130 * 131 * XXX Need a way to deal with linear/prefetchable/etc. 132 */ 133 return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0)); 134 #else 135 /* XXX Consider this further. */ 136 return (-1); 137 #endif 138 } 139 140 /* 141 * pci_devioctl: 142 * 143 * PCI ioctls that can be performed on devices directly. 144 */ 145 int 146 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, caddr_t data, 147 int flag, struct proc *p) 148 { 149 struct pciio_cfgreg *r = (void *) data; 150 151 switch (cmd) { 152 case PCI_IOC_CFGREAD: 153 case PCI_IOC_CFGWRITE: 154 if (cmd == PCI_IOC_CFGREAD) 155 r->val = pci_conf_read(pc, tag, r->reg); 156 else { 157 if ((flag & FWRITE) == 0) 158 return (EBADF); 159 pci_conf_write(pc, tag, r->reg, r->val); 160 } 161 break; 162 163 default: 164 return (EPASSTHROUGH); 165 } 166 167 return (0); 168 } 169