1 /* $NetBSD: pci_usrreq.c,v 1.2 2001/09/13 22:00:58 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/param.h> 43 #include <sys/conf.h> 44 #include <sys/device.h> 45 #include <sys/ioctl.h> 46 #include <sys/proc.h> 47 #include <sys/systm.h> 48 #include <sys/errno.h> 49 #include <sys/fcntl.h> 50 51 #include <dev/pci/pcireg.h> 52 #include <dev/pci/pcivar.h> 53 #include <dev/pci/pciio.h> 54 55 cdev_decl(pci); 56 57 int 58 pciopen(dev_t dev, int flags, int mode, struct proc *p) 59 { 60 struct pci_softc *sc; 61 int unit; 62 63 unit = minor(dev); 64 sc = device_lookup(&pci_cd, unit); 65 if (sc == NULL) 66 return (ENXIO); 67 68 return (0); 69 } 70 71 int 72 pciclose(dev_t dev, int flags, int mode, struct proc *p) 73 { 74 75 return (0); 76 } 77 78 int 79 pciioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 80 { 81 struct pci_softc *sc = device_lookup(&pci_cd, minor(dev)); 82 struct pciio_bdf_cfgreg *bdfr = (void *) data; 83 struct pciio_businfo *binfo = (void *) data; 84 pcitag_t tag; 85 86 switch (cmd) { 87 case PCI_IOC_BDF_CFGREAD: 88 case PCI_IOC_BDF_CFGWRITE: 89 if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs || 90 bdfr->function > 7) 91 return (EINVAL); 92 tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device, 93 bdfr->function); 94 if (cmd == PCI_IOC_BDF_CFGREAD) 95 bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag, 96 bdfr->cfgreg.reg); 97 else { 98 if ((flag & FWRITE) == 0) 99 return (EBADF); 100 pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg, 101 bdfr->cfgreg.val); 102 } 103 break; 104 105 case PCI_IOC_BUSINFO: 106 binfo->busno = sc->sc_bus; 107 binfo->maxdevs = sc->sc_maxndevs; 108 break; 109 110 default: 111 return (ENOTTY); 112 } 113 114 return (0); 115 } 116 117 paddr_t 118 pcimmap(dev_t dev, off_t offset, int prot) 119 { 120 #if 0 121 struct pci_softc *sc = device_lookup(&pci_cd, minor(dev)); 122 123 /* 124 * Since we allow mapping of the entire bus, we 125 * take the offset to be the address on the bus, 126 * and pass 0 as the offset into that range. 127 * 128 * XXX Need a way to deal with linear/prefetchable/etc. 129 */ 130 return (bus_space_mmap(sc->sc_memt, offset, 0, prot, 0)); 131 #else 132 /* XXX Consider this further. */ 133 return (-1); 134 #endif 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, caddr_t data, 144 int flag, struct proc *p) 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 (ENOTTY); 162 } 163 164 return (0); 165 } 166